Medical catheter and ablation instrument

Abstract

The utility model belongs to the field of medical instruments and discloses a medical catheter and an ablatometer, the medical catheter comprises a catheter body, a deformable body and a first optical fiber sensor, and the catheter body is provided with a far end used for being inserted into the body of a patient; the deformable body is arranged at the far end of the tube body; the first optical fiber sensor is arranged on the deformable body and used for measuring the force borne by the deformable body; wherein a plurality of first grooves distributed at intervals are formed in the outer side face of the deformable body, and at least one first groove extends in the axial direction of the deformable body in a non-spiral mode and rotates in the circumferential direction of the deformable body. According to the utility model, the deformation amount of the deformable body can be improved, the sensitivity of the force sensor is improved, and the anti-electromagnetic interference performance is high, thereby facilitating the improvement of the precision and reliability of force measurement.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to a medical catheter and an ablation device using the medical catheter. Background Technology

[0002] This technology provides a medical catheter for ablation therapy. In practice, medical personnel insert the distal end of the catheter through a tiny incision on the patient's skin. Once the distal end reaches and contacts the lesion, the ablation procedure can be initiated. Clinical studies have shown that the contact force between the catheter and the lesion is a key factor affecting the cure rate and safety of the ablation procedure. Insufficient contact force leads to a higher risk of recurrence, while excessive contact force poses a risk of cardiac wall damage or even perforation. Therefore, high-precision and reliable monitoring of the contact force between the catheter and the lesion can improve the cure rate and safety of ablation procedures and lower the surgical threshold.

[0003] To monitor the contact force between medical catheters and lesion tissue, a proposed technique involves placing a deformable body and a force sensor at the distal end of the catheter to measure the force value. This technique utilizes multiple slits spaced axially along the outer surface of the deformable body to achieve deformation under stress. The force sensor is either an electromagnetic sensor or a strain gauge located outside the deformable body. Since temperature affects the force measurement results, this technique employs a thermocouple as the temperature sensing element for temperature detection.

[0004] The medical catheters provided by the above-mentioned related technologies still have the following shortcomings in specific applications: (1) Due to the unreasonable structural design of the deformable body, the deformability of the deformable body is small and stress concentration is easy to occur; (2) When the force sensor uses an electromagnetic sensor, the force sensor is easily affected by electromagnetic interference, resulting in poor signal quality of the force sensor and low accuracy of force measurement; (3) When the force sensor uses a strain gauge, the force sensor is limited by environmental conditions such as temperature and humidity, resulting in large error in force measurement and low accuracy of force measurement; in addition, since the strain gauge needs to carry current, there are certain safety hazards in the use of the medical catheter. (4) Using a thermocouple as a temperature sensing element, on the one hand, the thermocouple will occupy a large end space of the medical catheter, which is not conducive to the miniaturization design of the medical catheter; on the other hand, an additional demodulation circuit is required to connect to the thermocouple, which is not conducive to reducing the cost of the ablation device. Utility Model Content

[0005] The first objective of this invention is to provide a medical catheter that addresses the technical problems of small deformability and low force measurement accuracy in related medical catheters.

[0006] To achieve the above objectives, the present invention provides a medical catheter, comprising:

[0007] A tube having a distal end for insertion into a patient;

[0008] A deformable variant, wherein the deformable variant is disposed at the distal end of the tube body;

[0009] A first fiber optic sensor is disposed on the deformable body for measuring the force acting on the deformable body;

[0010] The outer surface of the deformable body is provided with a plurality of spaced first grooves, at least one of which extends non-spirally along the axial direction of the deformable body and rotates around the circumference of the deformable body.

[0011] In one implementation, each of the first grooves extends non-spirally along the axial direction of the deformable and rotates circumferentially about the deformable.

[0012] In one embodiment, the first groove has a first end and a second end away from the first end, the first end and the second end being misaligned in the axial direction of the deformable body and in the circumferential direction of the deformable body.

[0013] In one embodiment, the first groove extends in a stepped, wavy, or serrated manner along the axial direction of the deformable shape.

[0014] Alternatively, the first groove has a first end and a second end away from the first end, the first groove extending from the first end in a stepped, wavy, or serrated manner to the second end.

[0015] In one embodiment, the first groove includes a plurality of sub-grooves connected in sequence, each sub-grooves including a first groove segment, a second groove segment and a connecting groove segment, wherein the connecting groove segment is bent or flexed and connected between the first groove segment and the second groove segment;

[0016] Wherein, the first groove segment and the second groove segment satisfy at least one of the following conditions: the extension direction of the first groove segment is different from the extension direction of the second groove segment; the inclination angle of the first groove segment relative to an axial end face of the deformable body is different from the inclination angle of the second groove segment relative to that axial end face; and the bending curvature of the first groove segment is different from the bending curvature of the second groove segment.

[0017] In one implementation, the extension direction of the first groove segment is different from that of the second groove segment, including: both the first groove segment and the second groove segment extend along a curved trajectory, and the bending direction of the first groove segment is different from that of the second groove segment; or, both the first groove segment and the second groove segment extend along a broken line trajectory, and the bending direction of the first groove segment is different from that of the second groove segment; or, one of the first groove segment and the second groove segment extends along a straight trajectory and the other extends along a curved trajectory; or, one of the first groove segment and the second groove segment extends along a straight trajectory and the other extends along a broken line trajectory; or, one of the first groove segment and the second groove segment extends along a curved trajectory and the other extends along a broken line trajectory.

[0018] Alternatively, the inclination angle of the first groove segment relative to an axial end face of the deformable variant is different from the inclination angle of the second groove segment relative to that axial end face, including: both the first groove segment and the second groove segment extend along a straight trajectory, and the inclination angle of the first groove segment relative to an axial end face of the deformable variant is different from the inclination angle of the second groove segment relative to that axial end face.

[0019] Alternatively, the curvature of the first groove segment may differ from that of the second groove segment, including: both the first and second groove segments extend along a curved trajectory, and the curvature of the first groove segment may differ from that of the second groove segment.

[0020] In one embodiment, both the first groove segment and the second groove segment extend along a straight trajectory, and the inclination angle of one of the first groove segment and the second groove segment relative to an axial end face of the deformable is greater than or equal to 0° and less than 45°, while the inclination angle of the other segment relative to the axial end face is greater than or equal to 45° and less than or equal to 90°.

[0021] Alternatively, both the first and second groove segments extend along a straight trajectory, and one of the first and second groove segments has an inclination angle relative to an axial end face of the deformable shape that is greater than or equal to 0° and less than 45°, while the other has an inclination angle relative to that axial end face that is greater than 90° and less than 180°.

[0022] In one embodiment, the connecting groove segment is configured with an arc bend, an acute angle bend, or an obtuse angle bend.

[0023] In one embodiment, there are multiple first grooves, and the multiple first grooves are distributed circumferentially around the deformable shape.

[0024] In one embodiment, the number of the first grooves is at least three, and the at least three first grooves are distributed at equal intervals.

[0025] In one embodiment, the projected portions of two adjacent first grooves overlap on the axial end face of the deformable shape;

[0026] And / or, the projections of any two of the first grooves onto any plane parallel to the central axis of the deformable shape are spaced apart.

[0027] In one embodiment, the projections of the plurality of first grooves on the axial end face of the deformable shape are connected to form a complete circle.

[0028] And / or, each circumferential portion of the pattern formed by the projections of the plurality of first grooves onto the axial end face of the deformable body is formed by the partial overlapping projections of at least two first grooves.

[0029] In one embodiment, the outer surface of the deformable shape is further provided with a second groove, in which the first optical fiber sensor is disposed and passes through at least one portion of the first groove.

[0030] In one embodiment, the second groove extends in a direction parallel to the axial direction of the deformable shape.

[0031] In one embodiment, the number of the first fiber optic sensors is at least three, and the outer surface of the deformable body is provided with at least three second grooves, which are distributed circumferentially around the deformable body, and each second groove is provided with one of the first fiber optic sensors.

[0032] In one embodiment, the medical catheter further includes at least one second optical fiber sensor, and the outer surface of the deformable body is provided with at least one third groove, each of the third grooves being provided with a second optical fiber sensor, the second optical fiber sensor being used to measure the temperature of the deformable body;

[0033] The at least one second fiber optic sensor and the at least three first fiber optic sensors are distributed circumferentially around the deformable shape;

[0034] The medical catheter also includes an optoelectronic connector and multiple transmission optical fibers. The number of transmission optical fibers is equal to the sum of the number of the first optical fiber sensors and the number of the second optical fiber sensors. Each of the first optical fiber sensors and each of the second optical fiber sensors is connected to one end of the optoelectronic connector through one of the transmission optical fibers. The other end of the optoelectronic connector has an interface. There is one interface, and the interface is used to output force measurement information and temperature measurement information.

[0035] In one implementation, each of the first optical fiber sensors is integrally formed with one of the transmission optical fibers;

[0036] And / or, each of the second optical fiber sensors is integrally formed with one of the transmission optical fibers.

[0037] In one embodiment, the first optical fiber sensor includes a first grating segment, a first optical fiber segment, and a second optical fiber segment. The two ends of the first grating segment are respectively connected to the first optical fiber segment and the second optical fiber segment. The first optical fiber segment is bonded to the deformable body with adhesive, and the second optical fiber segment is bonded to the deformable body with adhesive.

[0038] In one embodiment, the deformable shape and the first optical fiber sensor are disposed within the tube.

[0039] The second objective of this invention is to provide a medical catheter, which includes:

[0040] A tube having a distal end for insertion into a patient;

[0041] A deformable variant, wherein the deformable variant is disposed at the distal end of the tube body;

[0042] A first fiber optic sensor is disposed on the deformable body for measuring the force acting on the deformable body;

[0043] The outer surface of the deformable body is provided with a plurality of spaced first grooves, at least one of the first grooves is non-spiral extending, and the first groove has a first end and a second end away from the first end. The first end and the second end are misaligned in the axial direction of the deformable body and in the circumferential direction of the deformable body.

[0044] In one embodiment, the first groove extends from the first end in a stepped, wavy, or serrated manner to the second end;

[0045] And / or, the first groove includes a plurality of sequentially connected sub-grooves, each sub-grooves including a first groove segment, a second groove segment and a connecting groove segment, the connecting groove segment being bent or flexed and connected between the first groove segment and the second groove segment, wherein the first groove segment and the second groove segment satisfy at least one of the following conditions: the extension direction of the first groove segment is different from the extension direction of the second groove segment; the inclination angle of the first groove segment relative to an axial end face of the deformable body is different from the inclination angle of the second groove segment relative to that axial end face; and the curvature of the first groove segment is different from the curvature of the second groove segment.

[0046] In one embodiment, the outer surface of the deformable shape is further provided with a second groove, in which the first optical fiber sensor is disposed and passes through at least one portion of the first groove.

[0047] In one embodiment, the number of the first fiber optic sensors is at least three, and the outer surface of the deformable body is provided with at least three second grooves, which are distributed circumferentially around the deformable body, and each second groove is provided with a first fiber optic sensor;

[0048] The medical catheter also includes at least one second optical fiber sensor, and the outer surface of the deformable body is provided with at least one third groove, each of the third grooves being provided with a second optical fiber sensor, the second optical fiber sensor being used to measure the temperature of the deformable body;

[0049] The at least one second fiber optic sensor and the at least three first fiber optic sensors are distributed circumferentially around the deformable shape;

[0050] The medical catheter also includes an optoelectronic connector and multiple transmission optical fibers. The number of transmission optical fibers is equal to the sum of the number of the first optical fiber sensors and the number of the second optical fiber sensors. Each of the first optical fiber sensors and each of the second optical fiber sensors is connected to one end of the optoelectronic connector via one of the transmission optical fibers. The other end of the optoelectronic connector has an interface. The number of interfaces is one, and the interface is used to output force measurement information and temperature measurement information.

[0051] In one embodiment, the first optical fiber sensor includes a first grating segment, a first optical fiber segment, and a second optical fiber segment. The two ends of the first grating segment are respectively connected to the first optical fiber segment and the second optical fiber segment. The first optical fiber segment is bonded to the deformable body with adhesive, and the second optical fiber segment is bonded to the deformable body with adhesive.

[0052] The third objective of this utility model is to provide a medical catheter, which includes:

[0053] A tube having a distal end for insertion into a patient;

[0054] A deformable variant, wherein the deformable variant is disposed at the distal end of the tube body;

[0055] A first fiber optic sensor is disposed on the deformable body for measuring the force acting on the deformable body;

[0056] The deformable body has a plurality of spaced first grooves on its outer surface. At least one first groove includes a plurality of sequentially connected sub-grooves. Each sub-groove includes a first groove segment, a second groove segment, and a connecting groove segment. The connecting groove segment is bent or flexed and connected between the first groove segment and the second groove segment.

[0057] The first groove segment and the second groove segment satisfy at least one of the following conditions: the extension direction of the first groove segment is different from the extension direction of the second groove segment; the inclination angle of the first groove segment relative to an axial end face of the deformable body is different from the inclination angle of the second groove segment relative to that axial end face; and the curvature of the first groove segment is different from the curvature of the second groove segment.

[0058] In one implementation, the extension direction of the first groove segment is different from that of the second groove segment, including: both the first groove segment and the second groove segment extend along a curved trajectory, and the bending direction of the first groove segment is different from that of the second groove segment; or, both the first groove segment and the second groove segment extend along a broken line trajectory, and the bending direction of the first groove segment is different from that of the second groove segment; or, one of the first groove segment and the second groove segment extends along a straight trajectory and the other extends along a curved trajectory; or, one of the first groove segment and the second groove segment extends along a straight trajectory and the other extends along a broken line trajectory; or, one of the first groove segment and the second groove segment extends along a curved trajectory and the other extends along a broken line trajectory.

[0059] Alternatively, the inclination angle of the first groove segment relative to an axial end face of the deformable variant is different from the inclination angle of the second groove segment relative to that axial end face, including: both the first groove segment and the second groove segment extend along a straight trajectory, and the inclination angle of the first groove segment relative to an axial end face of the deformable variant is different from the inclination angle of the second groove segment relative to that axial end face.

[0060] Alternatively, the curvature of the first groove segment may differ from that of the second groove segment, including: both the first and second groove segments extend along a curved trajectory, and the curvature of the first groove segment may differ from that of the second groove segment.

[0061] In one embodiment, both the first groove segment and the second groove segment extend along a straight trajectory, and the inclination angle of one of the first groove segment and the second groove segment relative to an axial end face of the deformable is greater than or equal to 0° and less than 45°, while the inclination angle of the other segment relative to the axial end face is greater than or equal to 45° and less than or equal to 90°.

[0062] Alternatively, both the first and second groove segments extend along a straight trajectory, and one of the first and second groove segments has an inclination angle relative to an axial end face of the deformable shape that is greater than or equal to 0° and less than 45°, while the other has an inclination angle relative to that axial end face that is greater than 90° and less than 180°.

[0063] In one embodiment, the number of the first fiber optic sensors is at least three, and the outer surface of the deformable body is provided with at least three second grooves, which are distributed circumferentially around the deformable body, and each second groove is provided with a first fiber optic sensor;

[0064] The medical catheter also includes at least one second optical fiber sensor, and the outer surface of the deformable body is provided with at least one third groove, each of the third grooves being provided with a second optical fiber sensor, the second optical fiber sensor being used to measure the temperature of the deformable body;

[0065] The at least one second fiber optic sensor and the at least three first fiber optic sensors are distributed circumferentially around the deformable shape;

[0066] The medical catheter also includes an optoelectronic connector and multiple transmission optical fibers. The number of transmission optical fibers is equal to the sum of the number of the first optical fiber sensors and the number of the second optical fiber sensors. Each of the first optical fiber sensors and each of the second optical fiber sensors is connected to one end of the optoelectronic connector via one of the transmission optical fibers. The other end of the optoelectronic connector has an interface. The number of interfaces is one, and the interface is used to output force measurement information and temperature measurement information.

[0067] In one embodiment, the first optical fiber sensor includes a first grating segment, a first optical fiber segment, and a second optical fiber segment. The two ends of the first grating segment are respectively connected to the first optical fiber segment and the second optical fiber segment. The first optical fiber segment is bonded to the deformable body with adhesive, and the second optical fiber segment is bonded to the deformable body with adhesive.

[0068] The fourth objective of this utility model is to provide a medical catheter, which includes:

[0069] A tube having a distal end for insertion into a patient's body;

[0070] A deformable variant, wherein the deformable variant is disposed at the distal end;

[0071] A first fiber optic sensor is disposed on the deformable body for measuring the force acting on the deformable body;

[0072] The outer surface of the deformable body is provided with a plurality of spaced first grooves, at least one of which extends in a stepped, wavy, or serrated manner along the axial direction of the deformable body and rotates around the circumference of the deformable body.

[0073] In one embodiment, the outer surface of the deformable shape is further provided with a second groove, in which the first optical fiber sensor is disposed and passes through at least one portion of the first groove.

[0074] In one embodiment, the number of the first fiber optic sensors is at least three, and the outer surface of the deformable body is provided with at least three second grooves, which are distributed circumferentially around the deformable body, and each second groove is provided with a first fiber optic sensor;

[0075] The medical catheter also includes at least one second optical fiber sensor, and the outer surface of the deformable body is provided with at least one third groove, each of the third grooves being provided with a second optical fiber sensor, the second optical fiber sensor being used to measure the temperature of the deformable body;

[0076] The at least one second fiber optic sensor and the at least three first fiber optic sensors are distributed circumferentially around the deformable shape;

[0077] The medical catheter also includes an optoelectronic connector and multiple transmission optical fibers. The number of transmission optical fibers is equal to the sum of the number of the first optical fiber sensors and the number of the second optical fiber sensors. Each of the first optical fiber sensors and each of the second optical fiber sensors is connected to one end of the optoelectronic connector via one of the transmission optical fibers. The other end of the optoelectronic connector has an interface. The number of interfaces is one, and the interface is used to output force measurement information and temperature measurement information.

[0078] In one embodiment, the first optical fiber sensor includes a first grating segment, a first optical fiber segment, and a second optical fiber segment. The two ends of the first grating segment are respectively connected to the first optical fiber segment and the second optical fiber segment. The first optical fiber segment is bonded to the deformable body with adhesive, and the second optical fiber segment is bonded to the deformable body with adhesive.

[0079] The fifth objective of this utility model is to provide a medical catheter, which includes:

[0080] A tube having a distal end for insertion into a patient's body;

[0081] A deformable variant, wherein the deformable variant is disposed at the distal end;

[0082] A first fiber optic sensor is disposed on the deformable body for measuring the force acting on the deformable body;

[0083] The outer surface of the deformable body is provided with a plurality of spaced first grooves. Each first groove has a first end and a second end away from the first end. The first end and the second end are misaligned in the axial direction of the deformable body and in the circumferential direction of the deformable body. At least one of the first grooves extends from the first end in a stepped, wavy, or serrated manner to the second end.

[0084] In one embodiment, the outer surface of the deformable shape is further provided with a second groove, in which the first optical fiber sensor is disposed and passes through at least one portion of the first groove.

[0085] In one embodiment, the number of the first fiber optic sensors is at least three, and the outer surface of the deformable body is provided with at least three second grooves, which are distributed circumferentially around the deformable body, and each second groove is provided with a first fiber optic sensor;

[0086] The medical catheter also includes at least one second optical fiber sensor, and the outer surface of the deformable body is provided with at least one third groove, each of the third grooves being provided with a second optical fiber sensor, the second optical fiber sensor being used to measure the temperature of the deformable body;

[0087] The at least one second fiber optic sensor and the at least three first fiber optic sensors are distributed circumferentially around the deformable shape;

[0088] The medical catheter also includes an optoelectronic connector and multiple transmission optical fibers. The number of transmission optical fibers is equal to the sum of the number of the first optical fiber sensors and the number of the second optical fiber sensors. Each of the first optical fiber sensors and each of the second optical fiber sensors is connected to one end of the optoelectronic connector via one of the transmission optical fibers. The other end of the optoelectronic connector has an interface. The number of interfaces is one, and the interface is used to output force measurement information and temperature measurement information.

[0089] In one embodiment, the first optical fiber sensor includes a first grating segment, a first optical fiber segment, and a second optical fiber segment. The two ends of the first grating segment are respectively connected to the first optical fiber segment and the second optical fiber segment. The first optical fiber segment is bonded to the deformable body with adhesive, and the second optical fiber segment is bonded to the deformable body with adhesive.

[0090] The sixth objective of this utility model is to provide a medical catheter, which includes:

[0091] A tube having a distal end for insertion into a patient;

[0092] A deformable variant, wherein the deformable variant is disposed at the distal end of the tube body;

[0093] A first fiber optic sensor is disposed on the deformable body for measuring the force acting on the deformable body;

[0094] A second fiber optic sensor is disposed on the deformable body for measuring the temperature of the deformable body;

[0095] The number of the first fiber optic sensors is at least three;

[0096] The number of the second fiber optic sensors is at least one;

[0097] The at least one second fiber optic sensor and the at least three first fiber optic sensors are distributed circumferentially around the deformable shape;

[0098] The medical catheter also includes an optoelectronic connector and multiple transmission optical fibers. The number of transmission optical fibers is equal to the sum of the number of the first optical fiber sensors and the number of the second optical fiber sensors. Each of the first optical fiber sensors and each of the second optical fiber sensors is connected to one end of the optoelectronic connector via one of the transmission optical fibers. The other end of the optoelectronic connector has an interface. The number of interfaces is one, and the interface is used to output force measurement information and temperature measurement information.

[0099] In one embodiment, the outer surface of the deformable shape is further provided with at least three second grooves, and each of the first fiber optic sensors is disposed in one of the second grooves;

[0100] And / or, the outer surface of the deformable shape is further provided with at least one third groove, and each of the second fiber optic sensors is disposed in one of the third grooves.

[0101] In one embodiment, the first optical fiber sensor includes a first grating segment, a first optical fiber segment, and a second optical fiber segment. The two ends of the first grating segment are respectively connected to the first optical fiber segment and the second optical fiber segment. The first optical fiber segment is bonded to the deformable body with adhesive, and the second optical fiber segment is bonded to the deformable body with adhesive.

[0102] The seventh objective of this utility model is to provide an ablation device, which includes:

[0103] The aforementioned medical catheters;

[0104] The main unit, wherein the end of the medical catheter furthest from the deformable shape is connected to the main unit;

[0105] The host includes a housing, a demodulation device, a radio frequency source, and a display screen. The demodulation device and the radio frequency source are located inside the housing, and the display screen is at least partially exposed outside the housing. The demodulation device is used to analyze the force measurement information fed back by the medical catheter to obtain a measured force value. The display screen is used to display the measured force value. The radio frequency source is used to discharge to human tissue through the medical catheter.

[0106] In one embodiment, the number of the first fiber optic sensors is at least three, and the outer surface of the deformable body is provided with at least three second grooves, which are distributed circumferentially around the deformable body, and each second groove is provided with a first fiber optic sensor;

[0107] The medical catheter also includes at least one second optical fiber sensor, and the outer surface of the deformable body is provided with at least one third groove, each of the third grooves being provided with a second optical fiber sensor, the second optical fiber sensor being used to measure the temperature of the deformable body;

[0108] The at least one second fiber optic sensor and the at least three first fiber optic sensors are distributed circumferentially around the deformable shape;

[0109] The medical catheter also includes an optoelectronic connector and multiple transmission optical fibers. The number of transmission optical fibers is equal to the sum of the number of the first optical fiber sensors and the number of the second optical fiber sensors. Each of the first optical fiber sensors and each of the second optical fiber sensors is connected to one end of the optoelectronic connector through one of the transmission optical fibers. The other end of the optoelectronic connector has an interface. The number of interfaces is one, and the interface is used to output force measurement information and temperature measurement information.

[0110] The ablation device also includes a cable, with its two ends connected to the interface and the host respectively.

[0111] The medical catheter and ablation device provided by this invention, by providing a first groove on the outer surface of a deformable body, and setting the first groove to extend non-spirally along the axial direction and rotate around the circumference of the deformable body, allows the deformable body to achieve greater deformation under force, thus increasing the deformability of the deformable body. Furthermore, this invention measures the force on the deformable body by incorporating a first fiber optic sensor. On the one hand, the large deformation of the deformable body improves the sensitivity of force measurement; on the other hand, the high sensitivity and strong anti-electromagnetic interference characteristics of the fiber optic sensor improve the accuracy and reliability of force measurement. Attached Figure Description

[0112] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0113] Figure 1 This is a schematic diagram of the ablation device provided in this embodiment of the utility model;

[0114] Figure 2 This is a schematic diagram of the structure of the medical catheter provided in this embodiment of the utility model;

[0115] Figure 3 This is a schematic diagram of the structure of the medical catheter provided in this embodiment of the present invention after removing the tube body, handle, and photoelectric connector;

[0116] Figure 4 yes Figure 3 A schematic diagram of the structure after removing the end electrodes;

[0117] Figure 5 This is a three-dimensional assembly diagram of the first fiber optic sensor and the deformable shape provided in this embodiment of the utility model;

[0118] Figure 6 This is a schematic diagram showing the distribution of the first and second fiber optic sensors in deformable forms provided in this embodiment of the present invention.

[0119] Figure 7 This is a schematic diagram of one embodiment of the first groove provided in this utility model;

[0120] Figure 8 This is a schematic diagram of another embodiment of the first groove provided in this utility model;

[0121] Figure 9 This is a schematic diagram of another embodiment of the first groove provided in this utility model;

[0122] Figure 10 This is a schematic diagram of yet another embodiment of the first groove provided in this utility model;

[0123] Figure 11 This is a schematic diagram of yet another embodiment of the first groove provided in this utility model.

[0124] Reference numerals: 100, Medical catheter; 110, Tube body; 120, Deformable part; 121, First groove; 1210, Sub-groove; 1211, First groove segment; 1212, Second groove segment; 1213, Connecting groove segment; 122, Second groove; 123, Third groove; 124, First axial end face; 125, Second axial end face; 130, First fiber optic sensor; 140, Second fiber optic sensor; 150, Handle; 160, End electrode; 170, Optoelectronic connector; 180, Transmission fiber; 200, Main unit; 300, Cable. Detailed Implementation

[0125] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0126] This invention is applicable to scenarios requiring the insertion of medical catheters into patients for examination and treatment. Patients can be human or animal requiring examination or treatment. This invention improves the accuracy of force measurement during catheter insertion into patients through structural design.

[0127] like Figures 1 to 3 As shown, a medical catheter 100 provided in a first aspect of this utility model includes a deformable shape 120 and a first fiber optic sensor 130. The first fiber optic sensor 130 is disposed on the deformable shape 120 for measuring the force acting on the deformable shape 120. The deformable shape 120 can deform under force, and after the force applied to the deformable shape 120 is removed, the deformable shape 120 can return to its original shape. The first fiber optic sensor 130 can measure the external force acting on the deformable shape 120. The deformable shape 120 and the first fiber optic sensor 130 can constitute the end actuator of the medical catheter 100. In specific applications, the medical catheter 100 is inserted into the patient's body at the end where the deformable shape 120 and the first fiber optic sensor 130 are located. The first fiber optic sensor 130 can monitor the contact force between the medical catheter 100 and the patient's internal tissues. In this implementation scheme, an optical fiber sensor is used as the force sensor. On the one hand, the high sensitivity and strong anti-electromagnetic interference characteristics of the optical fiber sensor can be used to improve the accuracy and reliability of force measurement. On the other hand, the small size of the optical fiber sensor can be used to reduce the volume of the medical catheter 100.

[0128] Reference Figures 1 to 3As shown, in one embodiment, the medical catheter 100 also includes a tube body 110 having a distal end for insertion into a patient. A deformable portion 120 is disposed at the distal end of the tube body 110. The deformable portion 120 is only disposed at one end of the tube body 110, rather than extending through the entire tube body 110. The tube body 110 is an elongated, flexible tube. The tube body 110 is used to pull the deformable portion 120 into the patient's body.

[0129] Reference Figure 4 As shown, in one embodiment, the outer surface of the deformable variant 120 is provided with a first groove 121. The first groove 121 is mainly used to enhance the deformability of the deformable variant 120.

[0130] Reference Figure 4 and Figure 5 As shown, in one embodiment, the first groove 121 extends non-spirally along the axial direction of the deformable variant 120 and rotates circumferentially around the deformable variant 120. The non-spiral extension of the first groove 121 means that the first groove 121 extends continuously from one end to the other without a spiral, rather than being discontinuously spaced. In this embodiment, the first groove 121 is not a spiral groove, and the first groove 121 extends both axially and circumferentially around the deformable variant 120 (i.e., rotates circumferentially around the deformable variant 120), meaning the first groove 121 is a non-spiral groove with extension components in both the axial and circumferential directions. By adopting the first groove 121 configuration of this embodiment, the deformability of the deformable variant 120 can be increased, thereby improving the sensitivity and accuracy of the first fiber optic sensor 130.

[0131] In one implementation, there are multiple first grooves 121, meaning that the outer surface of the deformable body 120 is provided with multiple spaced-apart first grooves 121. At least one first groove 121 extends non-spirally along the axial direction of the deformable body 120 and rotates about the circumference of the deformable body 120. In this embodiment, "multiple" refers to at least two. The spaced distribution of multiple first grooves 121 can help increase the deformation of the deformable body 120. Of course, in specific applications, as an alternative implementation, the number of first grooves 121 can also be one.

[0132] In one implementation, each first groove 121 extends non-spirally along the axial direction of the deformable variant 120 and rotates circumferentially about the deformable variant 120. This helps to ensure that each first groove 121 has a good effect on increasing the deformation of the deformable variant 120. Of course, in specific applications, as an alternative implementation, at least one first groove 121 may not extend non-spirally along the axial direction of the deformable variant 120 and / or may not rotate circumferentially about the deformable variant 120.

[0133] In one embodiment, the deformable shape 120 has a first central axis, and the outer surface of the deformable shape 120 is arranged around the first central axis, that is, the outer surface of the deformable shape 120 is a surface of revolution.

[0134] As one implementation, the outer surface of the deformable body 120 is a cylindrical surface, which has a simple structure, is easy to manufacture, and facilitates the fitting of the deformable body 120 with the tube body 110.

[0135] In one embodiment, the first groove 121 has a first end and a second end away from the first end. The first end and the second end are offset in the axial direction of the deformable variant 120 and in the circumferential direction of the deformable variant 120. This allows the first groove 121 to extend along the axial direction of the deformable variant 120 and rotate around the circumferential direction of the deformable variant 120, thereby facilitating an increase in the deformability of the deformable variant 120. Specifically, the first groove 121 extends continuously from the first end to the second end. The first end and the second end being offset in the axial direction of the deformable variant 120 means that when the deformable variant 120 is placed vertically, the projections of the first end and the second end are in different orientations in the lateral projection (front view projection, rear view projection, left view projection, or right view projection) of the deformable variant 120, that is, the first end and the second end do not overlap in the lateral projection of the deformable variant 120. The first end and the second end are offset in the circumferential direction of the deformable variant 120, meaning that when the deformable variant 120 is placed vertically in the axial direction, the projections of the first end and the second end are in different orientations in the vertical projection (top view or bottom view) of the deformable variant 120, that is, the first end and the second end do not overlap in the vertical projection of the deformable variant 120.

[0136] In the above embodiment, the first end and the second end are offset in the axial direction of the deformable variant 120, and are also offset in the circumferential direction of the deformable variant 120. Alternatively, in an alternative embodiment, the first end and the second end may be offset only in the axial direction of the deformable variant 120, without offset in the circumferential direction. For example, the first end and the second end may be spaced apart in the axial direction of the deformable variant 120, and the second end may be rotated 360° relative to the first end, meaning the first groove 121 rotates 360° around the circumference of the deformable variant 120. In this alternative embodiment, in the vertical projection (top view or bottom view) of the deformable variant 120, the projections of the first end and the second end are in the same orientation, meaning the first end and the second end overlap in the vertical projection of the deformable variant 120.

[0137] Reference Figure 5 and Figures 7 to 11As shown, in one embodiment, the first groove 121 includes a plurality of sequentially connected sub-grooves 1210. Each sub-groove 1210 includes a first groove segment 1211, a second groove segment 1212, and a connecting groove segment 1213. The connecting groove segment 1213 is bent or flexed and connected between the first groove segment 1211 and the second groove segment 1212. The first groove segment 1211 and the second groove segment 1212 satisfy at least one of the following conditions: the extension direction of the first groove segment 1211 (including at least one of a straight extension direction, a bending direction, and a flexural direction) is different from the extension direction of the second groove segment 1212; the inclination angle of the first groove segment 1211 relative to an axial end face of the deformable variant 120 is different from the inclination angle of the second groove segment 1212 relative to the same axial end face; and the curvature of the first groove segment 1211 is different from the curvature of the second groove segment 1212. The inclination angle of the first groove segment 1211 relative to an axial end face of the deformable variant 120 is, in other words, the inclination angle of the first groove segment 1211 relative to the horizontal plane when the axial direction of the deformable variant 120 is vertical. The inclination angle of the second groove segment 1212 relative to an axial end face of the deformable variant 120 is, in other words, the inclination angle of the first groove segment 1211 relative to an axial end face of the deformable variant 120 is different from the inclination angle of the second groove segment 1212 relative to that axial end face; that is, the inclination angle of the first groove segment 1211 relative to an axial end face of the deformable variant 120 is greater than or less than the inclination angle of the second groove segment 1212 relative to that axial end face. The curvature of the first groove segment 1211 is different from the curvature of the second groove segment 1212; that is, the curvature of the first groove segment 1211 is greater than or less than the curvature of the second groove segment 1212. The inclination angle of the first groove segment 1211 relative to an axial end face of the deformable variant 120 is different from the inclination angle of the second groove segment 1212 relative to the same axial end face. Therefore, the inclination slope of the first groove segment 1211 relative to an axial end face of the deformable variant 120 is different from the inclination slope of the second groove segment 1212 relative to the same axial end face of the deformable variant 120. In this embodiment, "multiple" refers to at least two. In this embodiment, the first groove 121 is formed by a plurality of repeating sub-grooves 1210 connected sequentially, and each sub-grooves 1210 includes a first groove segment 1211 and a second groove segment 1212. At least one of the extension direction, inclination angle, and curvature of the first groove segment 1211 and the second groove segment 1212 is different, so that the first groove segment 1211 and the second groove segment 1212 can respectively increase the deformability of the deformable variant 120 in different directions.

[0138] Reference Figure 5 and Figures 7 to 11As shown, specifically, the deformable form 120 has a first axial end face 124 and a second axial end face 125, which are spaced apart along the axial direction of the deformable form 120. The inclination angle of the first groove segment 1211 and the second groove segment 1212 relative to an axial end face of the deformable form 120 can be an inclination angle relative to the first axial end face 124 or an inclination angle relative to the second axial end face 125, but the inclination angle of the first groove segment 1211 and the second groove segment 1212 is an inclination angle relative to the same axial end face of the deformable form 120. For ease of understanding in conjunction with the accompanying drawings, unless otherwise specified, the inclination angle of the first groove segment 1211 and the second groove segment 1212 relative to an axial end face of the deformable form 120 will be described using the inclination angle of the first groove segment 1211 and the second groove segment 1212 relative to the first axial end face 124 as an example.

[0139] In one implementation, the inclination angle of the first groove segment 1211 relative to an axial end face of the deformable variant 120 is different from the inclination angle of the second groove segment 1212 relative to that axial end face, or the curvature of the first groove segment 1211 is different from the curvature of the second groove segment 1212.

[0140] Reference Figure 5 , Figure 7 and Figure 10 As shown, in one embodiment, the inclination angle of the first groove segment 1211 relative to an axial end face of the deformable variant 120 is different from the inclination angle of the second groove segment 1212 relative to the axial end face. This includes: both the first groove segment 1211 and the second groove segment 1212 extend along a straight trajectory, and the inclination angle of the first groove segment 1211 relative to an axial end face of the deformable variant 120 is different from the inclination angle of the second groove segment 1212 relative to the axial end face.

[0141] Reference Figure 9 As shown, in one embodiment, the curvature of the first groove segment 1211 is different from that of the second groove segment 1212, including: both the first groove segment 1211 and the second groove segment 1212 extend along a curved trajectory, and the curvature of the first groove segment 1211 is different from that of the second groove segment 1212.

[0142] Reference Figure 8 and Figure 11As shown, in one embodiment, the extension direction of the first groove segment 1211 is different from the extension direction of the second groove segment 1212, including: both the first groove segment 1211 and the second groove segment 1212 extend along a curved trajectory, and the bending direction of the first groove segment 1211 is different from the bending direction of the second groove segment 1212; or, both the first groove segment 1211 and the second groove segment 1212 extend along a broken line trajectory, and the bending direction of the first groove segment 1211 is different from the bending direction of the second groove segment 1212; or, one of the first groove segment 1211 and the second groove segment 1212 extends along a straight line trajectory, and the other extends along a curved trajectory; or, one of the first groove segment 1211 and the second groove segment 1212 extends along a straight line trajectory, and the other extends along a broken line trajectory; or, one of the first groove segment 1211 and the second groove segment 1212 extends along a curved trajectory, and the other extends along a broken line trajectory. The broken line trajectory includes at least two non-collinear straight line segments that are sequentially bent and connected. In this implementation plan, the extension direction includes at least one of the following: a straight extension direction, a bending direction, and a curving direction.

[0143] Reference Figure 5 and Figure 7 As shown, in one configuration of the first groove segment 1211 and the second groove segment 1212, both the first groove segment 1211 and the second groove segment 1212 extend along a straight trajectory, meaning both are straight groove segments. The inclination angle of the first groove segment 1211 relative to an axial end face of the deformable variant 120 is different from the inclination angle of the second groove segment 1212 relative to that axial end face; that is, the inclination slope of the first groove segment 1211 relative to an axial end face of the deformable variant 120 is different from the inclination slope of the second groove segment 1212 relative to that axial end face. The inclination slope of the first groove segment 1211 is greater than or less than the inclination slope of the second groove segment 1212. In this embodiment, both the first groove segment 1211 and the second groove segment 1212 are configured as straight groove segments, which facilitates the processing of the first groove segment 1211 and the second groove segment 1212. By setting the inclination slope of the first groove segment 1211 and the inclination slope of the second groove segment 1212 to be different, the first groove segment 1211 and the second groove segment 1212 can respectively increase the deformability of the deformable body 120 in different directions, thereby achieving the purpose of enhancing the deformability of the deformable body 120.

[0144] As a further embodiment of the first arrangement of the first groove segment 1211 and the second groove segment 1212 described above, both the first groove segment 1211 and the second groove segment 1212 extend along a straight trajectory, and the inclination angle of one of the first groove segment 1211 and the second groove segment 1212 relative to an axial end face of the deformable variant 120 is greater than or equal to 0° and less than 45°, while the inclination angle of the other relative to the axial end face is greater than or equal to 45° and less than or equal to 90°. The groove segment with an inclination angle greater than or equal to 0° and less than 45° can be used to enhance the deformability of the deformable variant 120 in the axial direction. The groove segment with an inclination angle greater than or equal to 45° and less than or equal to 90° can be used to enhance the deformability of the deformable variant 120 in the radial direction. In this embodiment, by optimizing the inclination angles of the first groove segment 1211 and the second groove segment 1212 relative to the same axial end face of the deformable body 120, the first groove segment 1211 and the second groove segment 1212 can be used to enhance the deformability of the deformable body 120 in the axial and radial directions, respectively, thereby effectively increasing the deformability of the deformable body 120. Of course, in specific applications, the inclination method of the first groove segment 1211 and the second groove segment 1212 is not limited to this. For example, as an alternative embodiment, both the first groove segment 1211 and the second groove segment 1212 extend along a straight trajectory, and the inclination angle of one of the first groove segment 1211 and the second groove segment 1212 relative to an axial end face of the deformable body 120 is greater than or equal to 0° and less than 45°, and the inclination angle of the other relative to the axial end face is greater than 90° and less than 180°. In this way, the purpose of enhancing the deformability of the deformable body 120 in different directions can also be achieved by using the first groove segment 1211 and the second groove segment 1212 respectively.

[0145] As a further embodiment of the first arrangement of the first groove segment 1211 and the second groove segment 1212 described above, the inclination angle of the first groove segment 1211 relative to an axial end face of the deformable body 120 is greater than or equal to 0° and less than 20°, and the inclination angle of the second groove segment 1212 relative to the axial end face is greater than or equal to 70° and less than or equal to 110°. In this embodiment, the inclination angle of the first groove segment 1211 is close to 0°, which is beneficial to enhancing the deformability of the deformable body 120 in the axial direction, and the inclination angle of the second groove segment 1212 is close to 90°, which is beneficial to enhancing the deformability of the deformable body 120 in the radial direction. Of course, in specific applications, as an alternative embodiment, the inclination angle of the second groove segment 1212 relative to an axial end face of the deformable body 120 may also be greater than or equal to 0° and less than 20°, and the inclination angle of the first groove segment 1211 relative to the axial end face may be greater than or equal to 70° and less than or equal to 110°.

[0146] Reference Figure 5 and Figure 7As shown, in a further embodiment of the first arrangement of the first groove segment 1211 and the second groove segment 1212 described above, the first groove 121 extends in a stepped shape along the axial direction of the deformable variant 120. The stepped shape is also called a step shape. Each sub-groove 1210 forms a step (or level), and the edges of each step can be rounded, acute, obtuse, or right-angled. The first groove 121 extends step-by-step along the axial direction of the deformable variant 120. Specifically, the first groove 121 has a first end and a second end away from the first end, and the first groove 121 extends in a stepped shape from the first end to the second end. This arrangement can effectively increase the deformability of the deformable variant 120 in different directions. Of course, in specific applications, the shape of the first groove 121 is not limited to this; for example, refer to… Figure 10 As shown, as an alternative implementation, the first groove 121 may also extend in a serrated shape along the axial direction of the deformable variant 120, that is, the first groove 121 extends in a serrated shape from the first end to the second end.

[0147] Reference Figure 3 , Figure 8 and Figure 9 As shown, in a second configuration of the first groove segment 1211 and the second groove segment 1212, both the first groove segment 1211 and the second groove segment 1212 extend along a curved trajectory, and the bending direction of the first groove segment 1211 is different from that of the second groove segment 1212 and / or the curvature of the first groove segment 1211 is different from that of the second groove segment 1212. The curved trajectory can be an arc trajectory or other curved trajectories. In this embodiment, both the first groove segment 1211 and the second groove segment 1212 are curved groove segments. The configuration of the first groove segment 1211 and the second groove segment 1212 can be such that the bending directions are different but the curvatures are the same; or the bending directions are the same but the curvatures are different; or the bending directions and curvatures are both different. These configurations can all achieve the purpose of enhancing the deformability of the deformable body 120 in different directions using the first groove segment 1211 and the second groove segment 1212.

[0148] Reference Figure 3 and Figure 8 As shown, as a further embodiment of the second arrangement of the first groove segment 1211 and the second groove segment 1212 described above, the first groove 121 extends in a wavy shape along the axial direction of the deformable variant 120. Specifically, the first groove 121 has a first end and a second end away from the first end, and the first groove 121 extends in a wavy shape from the first end to the second end.

[0149] Reference Figure 3 and Figure 11As shown, as a third configuration of the first groove segment 1211 and the second groove segment 1212, both the first groove segment 1211 and the second groove segment 1212 extend along a broken line trajectory, and the bending direction of the first groove segment 1211 is different from that of the second groove segment 1212. The broken line trajectory is formed by connecting at least two straight lines that bend at an angle. In this embodiment, both the first groove segment 1211 and the second groove segment 1212 are broken line type groove segments. By setting the bending direction of the first groove segment 1211 to be different from that of the second groove segment 1212, the purpose of enhancing the deformability of the deformable body 120 in different directions can also be achieved by utilizing the first groove segment 1211 and the second groove segment 1212.

[0150] As a fourth arrangement of the first slot segment 1211 and the second slot segment 1212, one of the first slot segment 1211 and the second slot segment 1212 extends along a straight trajectory, and the other extends along a curved trajectory. By adopting this arrangement, the purpose of enhancing the deformability of the deformable body 120 in different directions can also be achieved by utilizing the first slot segment 1211 and the second slot segment 1212.

[0151] As a fifth arrangement of the first slot segment 1211 and the second slot segment 1212, one of the first slot segment 1211 and the second slot segment 1212 extends along a straight trajectory, and the other extends along a broken trajectory. By adopting this arrangement, the purpose of enhancing the deformability of the deformable body 120 in different directions can also be achieved by utilizing the first slot segment 1211 and the second slot segment 1212.

[0152] As a sixth arrangement of the first groove segment 1211 and the second groove segment 1212, one of the first groove segment 1211 and the second groove segment 1212 extends along a curved trajectory, and the other extends along a broken line trajectory. By adopting this arrangement, the purpose of enhancing the deformability of the deformable body 120 in different directions can also be achieved by utilizing the first groove segment 1211 and the second groove segment 1212.

[0153] In one implementation, the connecting groove segment 1213 is curved in an arc, which is equivalent to rounding or chamfering the corners at the connection between the first groove segment 1211 and the second groove segment 1212, thereby reducing stress concentration. Of course, in specific applications, the arrangement of the connecting groove segment 1213 is not limited to this. For example, as an alternative implementation, the connecting groove segment 1213 is bent at an acute angle or an obtuse angle, which is equivalent to chamfering the corners between the first groove segment 1211 and the second groove segment 1212, also helping to reduce stress concentration. Alternatively, as another alternative implementation, the connecting groove segment 1213 can also be bent at a right angle.

[0154] In one implementation, there are multiple first grooves 121, and the multiple first grooves 121 are distributed circumferentially around the deformable body 120, which helps to further increase the deformability of the deformable body 120.

[0155] In one implementation, the number of first grooves 121 is at least three, and the at least three first grooves 121 are equally spaced, that is, the distance between any two adjacent first grooves 121 is equal. Specifically, the distance between each group of identical parts of any two adjacent first grooves 121 is equal, and the distance between each group of two adjacent first grooves 121 is equal to the distance between other groups of two adjacent first grooves 121. In this implementation, when the deformable body 120 is subjected to external force, the deformation caused by the force is relatively uniform, thereby improving the sensitivity and accuracy of the first fiber optic sensor 130 in measuring force.

[0156] In one implementation, the projections of two adjacent first grooves 121 on the axial end face of the deformable variant 120 overlap, that is, the top-view projections or bottom-view projections of two adjacent first grooves 121 on the axial end face of the deformable variant 120 overlap. This ensures that when the deformable variant 120 is subjected to an axial external force, it has at least two axial deformation positions, thereby increasing the axial deformability of the deformable variant 120 and consequently improving the sensitivity and accuracy of force measurement. The projection of the first groove 121 on the axial end face of the deformable variant 120 refers to the top-view or bottom-view projection of the first groove 121 on the axial end face of the deformable variant 120.

[0157] In one implementation, the projections of any two first grooves 121 onto any plane parallel to the central axis of the deformable variant 120 are spaced apart. This ensures that when the deformable variant 120 is subjected to a radial external force, it has at least two radial deformation positions, thereby improving the radial deformability of the deformable variant 120 and consequently enhancing the sensitivity and accuracy of force measurement. The projections of the first grooves 121 onto any plane parallel to the central axis of the deformable variant 120 include: when the central axis of the deformable variant 120 is vertical, the first groove 121's frontal projection, rearward projection, leftward projection, rightward projection, or lateral projection from other orientations.

[0158] In one implementation, the projections of the plurality of first grooves 121 onto the axial end face of the deformable variant 120 are connected to form a complete circle, that is, in the orthographic projection of the plurality of first grooves 121 onto the axial end face of the deformable variant 120, the projections of the plurality of first grooves 121 are connected to form a circumferentially closed shape. This facilitates ensuring that the deformable variant 120 can deform regardless of which part of the circumference is subjected to force. The projections of the plurality of first grooves 121 onto the axial end face of the deformable variant 120 are either top-view or bottom-view projections of the plurality of first grooves 121 onto the axial end face of the deformable variant 120.

[0159] In one implementation, each circumferential portion of the pattern formed by the projections of the plurality of first grooves 121 onto the axial end face of the deformable variant 120 is formed by the overlapping projections of portions of at least two first grooves 121. That is, in each circumferential orientation of the deformable variant 120, portions of at least two first grooves 121 are distributed at axial intervals along the deformable variant 120. This ensures that when the deformable variant 120 is subjected to an axial external force in each circumferential orientation, it has at least two axial deformation positions, thereby improving the axial deformability of the deformable variant 120 and thus enhancing the sensitivity and accuracy of force measurement.

[0160] In one embodiment, the outer surface of the deformable form 120 is further provided with a second groove 122, and the first fiber optic sensor 130 is disposed in the second groove 122 and passes through at least one part of the first groove 121. In this embodiment, by accommodating the first fiber optic sensor 130 through the second groove 122, the structural compactness of the medical catheter 100 can be improved, thereby facilitating the miniaturization design of the medical catheter 100; on the other hand, the second groove 122 can be used to protect the first fiber optic sensor 130.

[0161] In one embodiment, the second groove 122 extends in a direction parallel to the axial direction of the deformable shape 120. In this embodiment, the second groove 122 is a straight groove, which facilitates the processing of the second groove 122 and allows the first fiber optic sensor 130 to be placed in a straight line.

[0162] In one implementation, the number of first fiber optic sensors 130 is multiple, that is, the number of first fiber optic sensors 130 is two or more.

[0163] In one implementation, the number of first fiber optic sensors 130 is at least three, and the at least three first fiber optic sensors 130 are distributed circumferentially around the deformable shape 120. This arrangement allows the medical catheter 100 to measure forces in three dimensions, thereby improving the accuracy of force measurement.

[0164] Reference Figure 1 , Figure 4 and Figure 6As shown, in one embodiment, the medical catheter 100 further includes at least one second fiber optic sensor 140, which is disposed on the deformable shape 120 for measuring the temperature of the deformable shape 120. In this embodiment, using the second fiber optic sensor 140 to detect temperature reduces the end space of the medical catheter 100 compared to using a thermocouple. Furthermore, the second fiber optic sensor 140 for temperature detection and the first fiber optic sensor 130 for force detection can share a demodulation circuit, eliminating the need for a separate demodulation circuit for temperature detection, thereby reducing costs.

[0165] In one implementation, at least one second fiber optic sensor 140 and at least three first fiber optic sensors 130 are distributed circumferentially around the deformable shape 120.

[0166] In one implementation, at least three first fiber optic sensors 130 are distributed at equal intervals around the deformable shape 120 in the circumferential direction, and a second fiber optic sensor 140 is disposed between any two adjacent first fiber optic sensors 130.

[0167] In one embodiment, the outer surface of the deformable form 120 is provided with at least three second grooves 122, which are distributed circumferentially around the deformable form 120, and each second groove 122 is provided with a first fiber optic sensor 130. In this embodiment, the number of second grooves 122 is at least three, and the number of second grooves 122 is the same as the number of first fiber optic sensors 130, so as to meet the installation requirements of at least three first fiber optic sensors 130.

[0168] In one embodiment, the outer surface of the deformable form 120 is provided with at least one third groove 123, and each third groove 123 is provided with a second fiber optic sensor 140. In this embodiment, by accommodating the second fiber optic sensor 140 through the third groove 123, the structural compactness of the medical catheter 100 can be improved, thereby facilitating the miniaturization design of the medical catheter 100; on the other hand, the third groove 123 can be used to protect the second fiber optic sensor 140.

[0169] Reference Figures 1 to 4As shown, in one embodiment, the medical catheter 100 further includes a photoelectric connector 170 and multiple transmission optical fibers 180. The number of transmission optical fibers 180 is equal to the sum of the number of first optical fiber sensors 130 and the number of second optical fiber sensors 140. Each first optical fiber sensor 130 and each second optical fiber sensor 140 is connected to one end of the photoelectric connector 170 via a transmission optical fiber 180. The other end of the photoelectric connector 170 has an interface for outputting force measurement information and temperature measurement information. In this embodiment, the transmission optical fibers 180 are used to transmit the measurement information of the first optical fiber sensors 130 and the second optical fiber sensors 140 to the photoelectric connector 170, and then to the demodulation device. The first optical fiber sensor 130 used for force measurement and the second optical fiber sensor 140 used for temperature measurement share the same photoelectric connector 170, which helps to reduce the number of components and lower costs, and also helps to reduce the demand for demodulation devices.

[0170] In one implementation, the number of interfaces is one. This interface enables the multiplexing of wavelength division multiplexing (WDM) interfaces, allowing for the output of multiple force and temperature measurement information. This improves the integration of the optocoupler 170, allowing force and temperature measurements to share the same demodulation device, significantly reducing the number of demodulation devices, and thus facilitating a reduction in the number of components and lower costs.

[0171] In one implementation, the tube 110 has a proximal end that is connected to the photoelectric connector 170. During a specific examination or treatment, the proximal end of the tube 110 is located outside the patient's body.

[0172] In one implementation, the number of second grooves 122 is equal to the number of first fiber optic sensors 130, and the number of third grooves 123 is equal to the number of second fiber optic sensors 140. Each first fiber optic sensor 130 is disposed in one second groove 122, and each second fiber optic sensor 140 is disposed in one third groove 123.

[0173] In one implementation, there are three first fiber optic sensors 130 and one second fiber optic sensor 140. There are three second grooves 122 and one third groove 123. One second fiber optic sensor 140 and three first fiber optic sensors 130 are distributed circumferentially around the deformable shape 120. This arrangement allows for the measurement of force in three dimensions and temperature, while also keeping the number of fiber optic sensors relatively low, thus reducing the cost of the medical catheter 100.

[0174] In one implementation, each first fiber optic sensor 130 is integrally formed with a corresponding transmission fiber 180. In specific applications, the first fiber optic sensor 130 can be formed by processing a portion of a fiber, with the remainder serving as the transmission fiber 180. This eliminates the need for the assembly and connection process between the first fiber optic sensor 130 and the transmission fiber 180.

[0175] In one implementation, each second fiber optic sensor 140 is integrally formed with a corresponding transmission fiber 180. In specific applications, the second fiber optic sensor 140 can be formed by processing a portion of a fiber, with the remainder serving as the transmission fiber 180. This eliminates the need for the assembly and connection process between the second fiber optic sensor 140 and the transmission fiber 180.

[0176] In one implementation, the first fiber optic sensor 130 is an FBG (Fiber Bragg Grating) strain sensor. The FBG strain sensor utilizes the photosensitivity of the fiber material. A Bragg grating is etched onto the fiber core using an ultraviolet laser. The Bragg grating itself reflects light of a specific wavelength. When the deformable part 120 deforms, changing the period of the Bragg grating's light, the reflected wavelength also changes accordingly. The change in the reflected wavelength is measured by a demodulation device to obtain the strain value, thereby achieving force measurement.

[0177] In one implementation, the second fiber optic sensor 140 is an FBG strain sensor. The principle of the second fiber optic sensor 140 is the same as that of the first fiber optic sensor 130, and will not be described in detail here. In this implementation, in order to improve the integration of the device, multiple FBG strain sensors of different bands are selected as force sensors and temperature sensors. The pigtails of the optical fibers are integrated into a single interface through an optoelectronic connector 170. This interface enables the output of multiple measurement information of force and temperature, effectively reducing the number of demodulation devices and the cost of the ablation device.

[0178] In one embodiment, the first fiber optic sensor 130 includes a first grating segment, a first fiber segment, and a second fiber segment. The two ends of the first grating segment are respectively connected to the first fiber segment and the second fiber segment. The first fiber segment and the second fiber segment are bonded to the deformable body 120 with adhesive. Because the medical catheter 100 is small in size and requires high sensitivity, the bonding process of the first fiber optic sensor 130 to the deformable body 120 has a significant impact on its performance. In this embodiment, the two ends of the first fiber optic sensor 130 are bonded to the deformable body 120 with adhesive, while the middle grating portion (the first grating segment) is suspended, meaning the middle grating portion is not bonded to the deformable body 120 with adhesive. This installation method reduces the coupling effect of adhesive on the signal, thereby improving the sensitivity and signal quality of the first fiber optic sensor 130.

[0179] In one embodiment, the second fiber optic sensor 140 includes a second grating segment, a third fiber optic segment, and a fourth fiber optic segment. The two ends of the second grating segment are respectively connected to the third and fourth fiber optic segments. The third and fourth fiber optic segments are bonded to the deformable body 120 with adhesive, and the same principle applies to the bonding of the second fiber optic sensor 140 to the deformable body 120. The bonding principle of the second fiber optic sensor 140 to the deformable body 120 is similar to that of the first fiber optic sensor 130 to the deformable body 120, and will not be detailed here.

[0180] In one embodiment, the deformable shape 120 and the first fiber optic sensor 130 are disposed within the tube body 110. The tube body 110 can protect the deformable shape 120 and the first fiber optic sensor 130.

[0181] In one embodiment, the second fiber optic sensor 140 is disposed inside the tube body 110. The tube body 110 can protect the second fiber optic sensor 140.

[0182] Reference Figures 1 to 3 As shown, in one embodiment, the medical catheter 100 also includes a handle 150, with one end of the multiple transmission optical fibers 180 extending away from the deformable form 120 through the handle 150 and connecting to the optoelectronic connector 170. During a specific examination or treatment, the handle 150 is located outside the patient's body for the operator to hold and manipulate the catheter body 110 to drive the deformable form 120 and the optical fiber sensors (including the first optical fiber sensor 130 and the second optical fiber sensor 140) into the patient's body.

[0183] Reference Figures 1 to 3 As shown, in one embodiment, the medical catheter 100 further includes a distal electrode 160, which is located at the distal end of the catheter body 110. The distal electrode 160 is used to discharge electricity to achieve a therapeutic function.

[0184] In one embodiment, the medical catheter 100 also includes a ring electrode, which is sleeved outside the catheter body 110 and positioned close to the distal end. The ring electrode is used to acquire electrocardiogram signals and to acquire the impedance value of the medical catheter 100 in contact with the human body.

[0185] The medical catheter 100 provided in the first aspect of this utility model, through optimized design of the deformable variant 120 structure, enhances both the axial and radial deformation capabilities of the deformable variant 120, thereby enabling the deformable variant 120 to achieve greater deformation and improving the sensitivity and accuracy of fiber optic sensor measurements. Furthermore, wavelength division multiplexing of multiple fiber optic sensors enables multi-parameter measurement, reducing the need for demodulation devices and thus lowering costs. In the small medical catheter 100, the fiber optic sensor employs a bonding process with both ends glued and the middle grating area suspended, which improves the sensitivity and signal quality of the fiber optic sensor.

[0186] A medical catheter 100 provided in a second aspect of this utility model includes a tube body 110, a deformable part 120, and a first fiber optic sensor 130. The tube body 110 has a distal end for insertion into a patient's body; the deformable part 120 is disposed at the distal end of the tube body 110; the first fiber optic sensor 130 is disposed on the deformable part 120 for measuring the force acting on the deformable part 120; wherein, a first groove 121 is provided on the outer surface of the deformable part 120, the first groove 121 is non-spiral extending, and the first groove 121 has a first end and a second end away from the first end, the first end and the second end are offset in the axial direction of the deformable part 120, and the first end and the second end are offset in the circumferential direction of the deformable part 120. The medical catheter 100 provided in the second aspect of this utility model is characterized by a non-spiral groove having an extension component in both the axial and circumferential directions on the outer surface of the deformable part 120. By adopting the first groove 121 configuration of this embodiment, the deformability of the deformable body 120 can be increased, thereby improving the sensitivity and accuracy of the first fiber optic sensor 130 measurement.

[0187] In one embodiment, there are multiple first grooves 121, that is, multiple spaced-apart first grooves 121 are provided on the outer surface of the deformable form 120. At least one first groove 121 extends non-spirally, and the first end and the second end of the first groove 121 are misaligned in the axial direction of the deformable form 120, and the first end and the second end are misaligned in the circumferential direction of the deformable form 120.

[0188] In one implementation, each first groove 121 extends in a non-spiral manner, and the first end and the second end of each first groove 121 are misaligned in the axial direction of the deformable variant 120 and misaligned in the circumferential direction of the deformable variant 120.

[0189] In one embodiment, the first groove 121 extends from the first end in a stepped, wavy, or serrated manner to the second end.

[0190] In one embodiment, the first groove 121 includes a plurality of sequentially connected sub-grooves 1210. Each sub-groove 1210 includes a first groove segment 1211, a second groove segment 1212, and a connecting groove segment 1213. The connecting groove segment 1213 is bent or flexed and connected between the first groove segment 1211 and the second groove segment 1212. The first groove segment 1211 and the second groove segment 1212 satisfy at least one of the following conditions: the extension direction of the first groove segment 1211 is different from the extension direction of the second groove segment 1212; the inclination angle of the first groove segment 1211 relative to an axial end face of the deformable body 120 is different from the inclination angle of the second groove segment 1212 relative to the same axial end face; and the curvature of the first groove segment 1211 is different from the curvature of the second groove segment 1212.

[0191] In one embodiment, the outer side of the deformable shape 120 is also provided with a second groove 122, and the first fiber optic sensor 130 is disposed in the second groove 122 and passes through at least one part of the first groove 121.

[0192] In one implementation, the number of first fiber optic sensors 130 is at least three.

[0193] In one embodiment, the medical catheter 100 also includes at least one second fiber optic sensor 140, which is disposed on the deformable body 120 for measuring the temperature of the deformable body 120.

[0194] In one implementation, at least one second fiber optic sensor 140 and at least three first fiber optic sensors 130 are distributed circumferentially around the deformable shape 120.

[0195] In one embodiment, the medical catheter 100 further includes a photoelectric connector 170 and multiple transmission optical fibers 180. The number of transmission optical fibers 180 is equal to the sum of the number of first optical fiber sensors 130 and the number of second optical fiber sensors 140. Each first optical fiber sensor 130 and each second optical fiber sensor 140 are connected to one end of the photoelectric connector 170 through a single transmission optical fiber 180. The other end of the photoelectric connector 170 has an interface, which is used to output force measurement information and temperature measurement information.

[0196] In one embodiment, the outer surface of the deformable variant 120 is provided with at least three second grooves 122. The at least three second grooves 122 are distributed circumferentially around the deformable variant 120, and each second groove 122 is provided with a first fiber optic sensor 130.

[0197] In one embodiment, the outer surface of the deformable variant 120 is provided with at least one third groove 123, and each third groove 123 is provided with a second fiber optic sensor 140.

[0198] In one embodiment, the first optical fiber sensor 130 includes a first grating segment, a first optical fiber segment, and a second optical fiber segment. The two ends of the first grating segment are respectively connected to the first optical fiber segment and the second optical fiber segment. The first optical fiber segment is bonded to the deformable body 120 with adhesive, and the second optical fiber segment is bonded to the deformable body 120 with adhesive.

[0199] Apart from the above, other parts and principles of the medical catheter 100 provided in the second aspect of the present invention can be referred to the medical catheter 100 provided in the first aspect of the present invention, and will not be described in detail here.

[0200] A third aspect of this utility model provides a medical catheter 100, comprising a tube body 110, a deformable part 120, and a first fiber optic sensor 130. The tube body 110 has a distal end for insertion into a patient's body; the deformable part 120 is disposed at the distal end of the tube body 110; the first fiber optic sensor 130 is disposed on the deformable part 120 for measuring the force acting on the deformable part 120; wherein, the outer surface of the deformable part 120 is provided with a first groove 121, the first groove 121 including a plurality of sequentially connected sub-grooves 1210, the sub-grooves 1210 including a first groove segment 1211, a second groove segment 1211, a third ... The first groove segment 1212 and the connecting groove segment 1213 are bent or flexed and connected between the first groove segment 1211 and the second groove segment 1212. The first groove segment 1211 and the second groove segment 1212 satisfy at least one of the following conditions: the extension direction of the first groove segment 1211 is different from the extension direction of the second groove segment 1212; the inclination angle of the first groove segment 1211 relative to an axial end face of the deformable body 120 is different from the inclination angle of the second groove segment 1212 relative to the same axial end face; and the bending curvature of the first groove segment 1211 is different from the bending curvature of the second groove segment 1212. In this embodiment, the first groove segment 1211 and the second groove segment 1212 of the first groove 121 can respectively increase the deformability of the deformable body 120 in different directions, thereby achieving the purpose of increasing the deformability of the deformable body 120.

[0201] In one embodiment, there are multiple first grooves 121, that is, the outer surface of the deformable 120 is provided with multiple spaced first grooves 121. At least one first groove 121 includes multiple sub-grooves 1210 connected in sequence, and the sub-grooves 1210 include a first groove segment 1211, a second groove segment 1212 and a connecting groove segment 1213.

[0202] In one embodiment, each first groove 121 includes a plurality of sub-grooves 1210 connected in sequence, the sub-grooves 1210 including a first groove segment 1211, a second groove segment 1212 and a connecting groove segment 1213.

[0203] In one implementation, the extension direction of the first groove segment 1211 is different from the extension direction of the second groove segment 1212, including: both the first groove segment 1211 and the second groove segment 1212 extend along a curved trajectory, and the bending direction of the first groove segment 1211 is different from the bending direction of the second groove segment 1212; or, both the first groove segment 1211 and the second groove segment 1212 extend along a broken line trajectory, and the bending direction of the first groove segment 1211 is different from the bending direction of the second groove segment 1212; or, one of the first groove segment 1211 and the second groove segment 1212 extends along a straight trajectory and the other extends along a curved trajectory; or, one of the first groove segment 1211 and the second groove segment 1212 extends along a straight trajectory and the other extends along a broken line trajectory; or, one of the first groove segment 1211 and the second groove segment 1212 extends along a curved trajectory and the other extends along a broken line trajectory.

[0204] In one implementation, the inclination angle of the first groove segment 1211 relative to the axial end face of the deformable variant 120 is different from the inclination angle of the second groove segment 1212 relative to the axial end face of the deformable variant 120. This includes the following: both the first groove segment 1211 and the second groove segment 1212 extend along a straight trajectory, and the inclination angle of the first groove segment 1211 relative to the axial end face of the deformable variant 120 is different from the inclination angle of the second groove segment 1212 relative to the axial end face of the deformable variant 120.

[0205] In one implementation, the curvature of the first groove segment 1211 is different from that of the second groove segment 1212, including: both the first groove segment 1211 and the second groove segment 1212 extend along a curved trajectory, and the curvature of the first groove segment 1211 is different from that of the second groove segment 1212.

[0206] In one embodiment, both the first groove segment 1211 and the second groove segment 1212 extend along a straight trajectory, and the inclination angle of one of the first groove segment 1211 and the second groove segment 1212 relative to an axial end face of the deformable variant 120 is greater than or equal to 0° and less than 45°, while the inclination angle of the other relative to the axial end face is greater than or equal to 45° and less than or equal to 90°; or, both the first groove segment 1211 and the second groove segment 1212 extend along a straight trajectory, and the inclination angle of one of the first groove segment 1211 and the second groove segment 1212 relative to an axial end face of the deformable variant 120 is greater than or equal to 0° and less than 45°, while the inclination angle of the other relative to the axial end face is greater than 90° and less than 180°.

[0207] In one implementation, the number of first fiber optic sensors 130 is at least three.

[0208] In one embodiment, the medical catheter 100 also includes at least one second fiber optic sensor 140, which is disposed on the deformable body 120 for measuring the temperature of the deformable body 120.

[0209] In one implementation, at least one second fiber optic sensor 140 and at least three first fiber optic sensors 130 are distributed circumferentially around the deformable shape 120.

[0210] In one embodiment, the medical catheter 100 further includes a photoelectric connector 170 and multiple transmission optical fibers 180. The number of transmission optical fibers 180 is equal to the sum of the number of first optical fiber sensors 130 and the number of second optical fiber sensors 140. Each first optical fiber sensor 130 and each second optical fiber sensor 140 are connected to one end of the photoelectric connector 170 through a single transmission optical fiber 180. The other end of the photoelectric connector 170 has an interface, which is used to output force measurement information and temperature measurement information.

[0211] In one embodiment, the outer surface of the deformable variant 120 is provided with at least three second grooves 122. The at least three second grooves 122 are distributed circumferentially around the deformable variant 120, and each second groove 122 is provided with a first fiber optic sensor 130.

[0212] In one embodiment, the outer surface of the deformable variant 120 is provided with at least one third groove 123, and each third groove 123 is provided with a second fiber optic sensor 140.

[0213] In one embodiment, the first optical fiber sensor 130 includes a first grating segment, a first optical fiber segment, and a second optical fiber segment. The two ends of the first grating segment are respectively connected to the first optical fiber segment and the second optical fiber segment. The first optical fiber segment is bonded to the deformable body 120 with adhesive, and the second optical fiber segment is bonded to the deformable body 120 with adhesive.

[0214] Apart from the above, other parts and principles of the medical catheter 100 provided in the third aspect of the present utility model can be referred to the medical catheter 100 provided in the first and second aspects of the present utility model, and will not be described in detail here.

[0215] A fourth aspect of this utility model provides a medical catheter 100, including a tube body 110, a deformable shape 120, and a first fiber optic sensor 130. The tube body 110 has a distal end for insertion into a patient's body; the deformable shape 120 is disposed at the distal end; the first fiber optic sensor 130 is disposed on the deformable shape 120 for measuring the force acting on the deformable shape 120; wherein, the outer surface of the deformable shape 120 is provided with a first groove 121, which extends in a stepped, wavy, or serrated manner along the axial direction of the deformable shape 120 and rotates circumferentially around the deformable shape 120. In this embodiment, by providing a first groove 121 extending in a stepped, wavy, or serrated manner on the outside of the deformable shape 120 and rotating circumferentially around the deformable shape 120, the deformability of the deformable shape 120 can be increased.

[0216] In one embodiment, there are multiple first grooves 121, that is, multiple spaced-apart first grooves 121 are provided on the outer surface of the deformable form 120. At least one first groove 121 extends in a stepped, wavy, or serrated manner along the axial direction of the deformable form 120 and rotates around the circumference of the deformable form 120.

[0217] In one implementation, each first groove 121 extends in a stepped, wavy, or serrated manner along the axial direction of the deformable 120 and rotates about the circumference of the deformable 120.

[0218] In one embodiment, the outer side of the deformable shape 120 is also provided with a second groove 122, and the first fiber optic sensor 130 is disposed in the second groove 122 and passes through at least one part of the first groove 121.

[0219] In one implementation, the number of first fiber optic sensors 130 is at least three.

[0220] In one embodiment, the medical catheter 100 also includes at least one second fiber optic sensor 140, which is disposed on the deformable body 120 for measuring the temperature of the deformable body 120.

[0221] In one implementation, at least one second fiber optic sensor 140 and at least three first fiber optic sensors 130 are distributed circumferentially around the deformable shape 120.

[0222] In one embodiment, the medical catheter 100 further includes a photoelectric connector 170 and multiple transmission optical fibers 180. The number of transmission optical fibers 180 is equal to the sum of the number of first optical fiber sensors 130 and the number of second optical fiber sensors 140. Each first optical fiber sensor 130 and each second optical fiber sensor 140 are connected to one end of the photoelectric connector 170 through a single transmission optical fiber 180. The other end of the photoelectric connector 170 has an interface, which is used to output force measurement information and temperature measurement information.

[0223] In one embodiment, the number of second grooves 122 is at least three, that is, at least three second grooves 122 are provided on the outer surface of the deformable shape 120. The at least three second grooves 122 are distributed circumferentially around the deformable shape 120, and each second groove 122 is provided with a first optical fiber sensor 130.

[0224] In one embodiment, the outer surface of the deformable variant 120 is provided with at least one third groove 123, and each third groove 123 is provided with a second fiber optic sensor 140.

[0225] In one embodiment, the first optical fiber sensor 130 includes a first grating segment, a first optical fiber segment, and a second optical fiber segment. The two ends of the first grating segment are respectively connected to the first optical fiber segment and the second optical fiber segment. The first optical fiber segment is bonded to the deformable body 120 with adhesive, and the second optical fiber segment is bonded to the deformable body 120 with adhesive.

[0226] Apart from the above, other parts and principles of the medical catheter 100 provided in the fourth aspect of the present invention can be referred to the medical catheter 100 provided in the first to third aspects of the present invention, and will not be described in detail here.

[0227] A medical catheter 100 provided in the fifth aspect of this utility model includes a tube body 110, a deformable part 120, and a first fiber optic sensor 130. The tube body 110 has a distal end for insertion into a patient's body. The deformable part 120 is disposed at the distal end. The first fiber optic sensor 130 is disposed on the deformable part 120 for measuring the force on the deformable part 120. The outer surface of the deformable part 120 is provided with a first groove 121. The first groove 121 has a first end and a second end away from the first end. The first end and the second end are offset in the axial direction of the deformable part 120 and in the circumferential direction of the deformable part 120. The first groove 121 extends from the first end in a stepped, wavy, or serrated manner to the second end. In this embodiment, by providing a first groove 121 that extends in a stepped, wavy, or serrated manner and rotates circumferentially around the deformable shape 120, the deformability of the deformable shape 120 can be increased.

[0228] In one embodiment, there are multiple first grooves 121, that is, the outer surface of the deformable 120 is provided with multiple spaced first grooves 121. At least one first groove 121 extends from the first end in a stepped, wavy, or serrated manner to the second end.

[0229] In one embodiment, each first groove 121 extends from the first end in a stepped, wavy, or serrated manner to the second end.

[0230] In one embodiment, the outer side of the deformable shape 120 is also provided with a second groove 122, and the first fiber optic sensor 130 is disposed in the second groove 122 and passes through at least one part of the first groove 121.

[0231] In one embodiment, the number of first fiber optic sensors 130 is at least three; the medical catheter 100 also includes at least one second fiber optic sensor 140, which is disposed on the deformable body 120 for measuring the temperature of the deformable body 120; at least one second fiber optic sensor 140 and at least three first fiber optic sensors 130 are distributed circumferentially around the deformable body 120; the medical catheter 100 also includes an optocoupler 170 and multiple transmission optical fibers 180, the number of transmission optical fibers 180 being equal to the sum of the number of first fiber optic sensors 130 and the number of second fiber optic sensors 140, and each first fiber optic sensor 130 and each second fiber optic sensor 140 are respectively connected to one end of the optocoupler 170 through one transmission optical fiber 180, and the other end of the optocoupler 170 forms an interface, the number of which is one, and the interface is used to output force measurement information and temperature measurement information.

[0232] In one embodiment, the outer surface of the deformable body 120 is provided with at least three second grooves 122, the at least three second grooves 122 are distributed circumferentially around the deformable body 120, and each second groove 122 is provided with a first fiber optic sensor 130.

[0233] In one embodiment, the outer surface of the deformable variant 120 is provided with at least one third groove 123, and each third groove 123 is provided with a second fiber optic sensor 140.

[0234] In one embodiment, the first optical fiber sensor 130 includes a first grating segment, a first optical fiber segment, and a second optical fiber segment. The two ends of the first grating segment are respectively connected to the first optical fiber segment and the second optical fiber segment. The first optical fiber segment is bonded to the deformable body 120 with adhesive, and the second optical fiber segment is bonded to the deformable body 120 with adhesive.

[0235] Apart from the above, other parts and principles of the medical catheter 100 provided in the fifth aspect of the present invention can be referred to the medical catheter 100 provided in the first to fourth aspects of the present invention, and will not be described in detail here.

[0236] A medical catheter 100 provided in the sixth aspect of this utility model includes a tube body 110, a deformable shape 120, a first fiber optic sensor 130, and a second fiber optic sensor 140. The tube body 110 has a distal end for insertion into a patient's body; the deformable shape 120 is disposed at the distal end of the tube body 110; the first fiber optic sensor 130 is disposed on the deformable shape 120 for measuring the force acting on the deformable shape 120; the second fiber optic sensor 140 is disposed on the deformable shape 120 for measuring the temperature of the deformable shape 120; wherein the number of first fiber optic sensors 130 is at least three; the number of second fiber optic sensors 140 is at least one; at least A second fiber optic sensor 140 and at least three first fiber optic sensors 130 are circumferentially spaced around a deformable structure 120. The medical catheter 100 also includes a photoelectric connector 170 and multiple transmission fibers 180. The number of transmission fibers 180 is equal to the sum of the number of first fiber optic sensors 130 and the number of second fiber optic sensors 140. Each first fiber optic sensor 130 and each second fiber optic sensor 140 is connected to one end of the photoelectric connector 170 via a single transmission fiber 180. The other end of the photoelectric connector 170 has an interface, which is used to output force measurement information and temperature measurement information. In this embodiment, the first fiber optic sensor 130 for force measurement and the second fiber optic sensor 140 for temperature measurement share the same photoelectric connector 170, which helps to reduce the number of components and lower costs, as well as reduce the need for demodulation devices.

[0237] In one implementation, the number of interfaces is one. This interface enables the multiplexing of wavelength division multiplexing (WDM) interfaces, allowing for the output of multiple force and temperature measurement information. This improves the integration of the optocoupler 170, allowing force and temperature measurements to share the same demodulation device, significantly reducing the number of demodulation devices, and thus facilitating a reduction in the number of components and lower costs.

[0238] In one embodiment, the outer side of the deformable shape 120 is also provided with a second groove 122, and the first fiber optic sensor 130 is disposed in the first groove 121 within the second groove 122.

[0239] In one embodiment, the number of second grooves 122 is at least three, that is, the outer side of the deformable 120 is provided with at least three second grooves 122, and each first fiber optic sensor 130 is disposed in one second groove 122.

[0240] In one embodiment, the outer surface of the deformable variant 120 is also provided with at least one third groove 123, and each second fiber optic sensor 140 is disposed in a third groove 123.

[0241] In one embodiment, the first optical fiber sensor 130 includes a first grating segment, a first optical fiber segment, and a second optical fiber segment. The two ends of the first grating segment are respectively connected to the first optical fiber segment and the second optical fiber segment. The first optical fiber segment is bonded to the deformable body 120 with adhesive, and the second optical fiber segment is bonded to the deformable body 120 with adhesive.

[0242] Apart from the above, other parts and principles of the medical catheter 100 provided in the sixth aspect of the present invention can be referred to the medical catheter 100 provided in the first to fifth aspects of the present invention, and will not be described in detail here.

[0243] Reference Figures 1 to 11As shown, a seventh aspect of this utility model provides an ablation device, which includes a main unit 200 and a medical catheter 100, any one of the first to sixth aspects described above. The end of the medical catheter 100 furthest from the deformable variant 120 is connected to the main unit 200. The main unit 200 includes a housing, a demodulation device, a radio frequency (RF) source, and a display screen. The demodulation device and the RF source are housed within the housing, while the display screen is at least partially exposed outside the housing. The demodulation device analyzes the force measurement information fed back by the medical catheter 100 to obtain a measured force value. The display screen displays the measured force value, and the RF source discharges onto human tissue through the medical catheter 100. In specific applications, the distal end of the medical catheter 100 can be inserted into the human body first. The demodulation device processes the measurement information from the first fiber optic sensor 130 to obtain the force of contact between the medical catheter 100 and the human tissue. After the examination is completed, the RF source then discharges onto the human tissue through the medical catheter 100. The above-mentioned medical catheter 100 is used in this implementation plan, which can help improve the accuracy and reliability of measuring the contact force between the medical catheter 100 and the lesion tissue.

[0244] In one implementation, the number of first fiber optic sensors 130 is at least three; the medical catheter 100 also includes at least one second fiber optic sensor 140, which is disposed on the deformable body 120 for measuring the temperature of the deformable body 120; at least one second fiber optic sensor 140 and at least three first fiber optic sensors 130 are distributed circumferentially around the deformable body 120; the medical catheter 100 also includes an optoelectronic connector 170 and multiple transmission optical fibers 180, the number of transmission optical fibers 180 being equal to the sum of the number of first fiber optic sensors 130 and the number of second fiber optic sensors 140, and each first fiber optic sensor 130 and each second fiber optic sensor 140 are respectively connected to one end of the optoelectronic connector 170 through a transmission optical fiber 180, the other end of the optoelectronic connector 170 forming an interface, the number of interfaces being one, and the interface being used to output force measurement information and temperature measurement information; the ablation device also includes a cable 300, the two ends of which are respectively connected to the interface and the host 200.

[0245] In one embodiment, the outer surface of the deformable body 120 is provided with at least three second grooves 122, the at least three second grooves 122 are distributed circumferentially around the deformable body 120, and each second groove 122 is provided with a first fiber optic sensor 130.

[0246] In one embodiment, the outer surface of the deformable variant 120 is provided with at least one third groove 123, and each third groove 123 is provided with a second fiber optic sensor 140.

[0247] In one implementation, at least three first fiber optic sensors 130 are distributed at equal intervals around the deformable shape 120 in the circumferential direction, and there is one second fiber optic sensor 140, which is disposed between two adjacent first fiber optic sensors 130.

[0248] In addition to the above, other parts and principles of the medical catheter 100 of the ablation device provided in the seventh aspect of the present invention can be referred to the medical catheter 100 provided in the first to sixth aspects of the present invention, and will not be described in detail here.

[0249] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A medical catheter, characterized by: include: A tube having a distal end for insertion into a patient; A deformable variant, wherein the deformable variant is disposed at the distal end of the tube body; a first optical fiber sensor disposed on the deformable body ， for measuring a force experienced by the deformable body; The outer surface of the deformable body is provided with a plurality of spaced first grooves, at least one of which extends non-spirally along the axial direction of the deformable body and rotates around the circumference of the deformable body.

2. The medical catheter of claim 1, wherein: Each of the first grooves extends non-spirally along the axial direction of the deformable and rotates circumferentially about the deformable.

3. The medical catheter of claim 1, wherein: The first groove has a first end and a second end away from the first end, the first end and the second end being misaligned in the axial direction of the deformable body and in the circumferential direction of the deformable body.

4. The medical catheter of claim 1, wherein: The first groove extends in a stepped, wavy, or serrated manner along the axial direction of the deformable shape. Alternatively, the first groove has a first end and a second end away from the first end, the first groove extending from the first end in a stepped, wavy, or serrated manner to the second end.

5. The medical catheter of claim 1, wherein: The first groove includes a plurality of sub-grooves connected in sequence. Each sub-grooves includes a first groove segment, a second groove segment, and a connecting groove segment. The connecting groove segment is bent or flexed and connected between the first groove segment and the second groove segment. Wherein, the first groove segment and the second groove segment satisfy at least one of the following conditions: the extension direction of the first groove segment is different from the extension direction of the second groove segment; the inclination angle of the first groove segment relative to an axial end face of the deformable body is different from the inclination angle of the second groove segment relative to that axial end face; and the bending curvature of the first groove segment is different from the bending curvature of the second groove segment.

6. The medical catheter of claim 5, wherein: The extension direction of the first groove segment is different from that of the second groove segment, including: both the first groove segment and the second groove segment extend along a curved trajectory, and the bending direction of the first groove segment is different from that of the second groove segment; or, both the first groove segment and the second groove segment extend along a broken line trajectory, and the bending direction of the first groove segment is different from that of the second groove segment; or, one of the first groove segment and the second groove segment extends along a straight trajectory and the other extends along a curved trajectory; or, one of the first groove segment and the second groove segment extends along a straight trajectory and the other extends along a broken line trajectory; or, one of the first groove segment and the second groove segment extends along a curved trajectory and the other extends along a broken line trajectory. Alternatively, the inclination angle of the first groove segment relative to an axial end face of the deformable variant is different from the inclination angle of the second groove segment relative to that axial end face, including: both the first groove segment and the second groove segment extend along a straight trajectory, and the inclination angle of the first groove segment relative to an axial end face of the deformable variant is different from the inclination angle of the second groove segment relative to that axial end face. Alternatively, the curvature of the first groove segment may differ from that of the second groove segment, including: both the first and second groove segments extend along a curved trajectory, and the curvature of the first groove segment may differ from that of the second groove segment.

7. The medical catheter of claim 6, wherein: The first groove segment and the second groove segment both extend along a straight line, and one of the first groove segment and the second groove segment is inclined to an axial end surface of the deformable body by an angle greater than or equal to 0° and less than 45°, and the other is inclined to the axial end surface by an angle greater than 90° and less than 180°. The first groove segment and the second groove segment both extend along a straight line, and one of the first groove segment and the second groove segment is inclined to an axial end surface of the deformable body by an angle greater than or equal to 0° and less than 45°, and the other is inclined to the axial end surface by an angle greater than 90° and less than 180°.

8. A medical catheter according to any one of claims 5 to 7, wherein: The connecting groove segment is arranged in a circular arc or an acute angle or an obtuse angle.

9. The medical catheter of any one of claims 1 to 7, wherein: The first grooves are spaced apart around the circumference of the deformable body.

10. The medical catheter of claim 1, wherein: The number of the first grooves is at least three, and the at least three first grooves are equally spaced apart.

11. The medical catheter of claim 1, wherein: The projections of two adjacent first grooves on the axial end surface of the deformable body overlap. The projections of any two first grooves on any plane parallel to the central axis of the deformable body are spaced apart.

12. The medical catheter of any one of claims 1 to 7 or 10 or 11, characterized in that: The projections of the first grooves on the axial end surface of the deformable body form a complete circle. The projections of the first grooves on the axial end surface of the deformable body form a pattern, and each circumferential part of the pattern is formed by overlapping projections of at least two first grooves.

13. The medical catheter of any one of claims 1 to 7 or 10 or 11, wherein: The outer side surface of the deformable body is further provided with a second groove, and the first optical fiber sensor is arranged in the second groove and passes through a part of at least one first groove.

14. The medical catheter of claim 13, wherein: The second groove extends in a direction parallel to the axial direction of the deformable body.

15. The medical catheter of any one of claims 1 to 7 or 10 or 11, wherein: The number of the first optical fiber sensors is at least three, and the outer side of the deformable body is provided with at least three second grooves ， The at least three second grooves are spaced around the circumference of the deformable body, and each of the second grooves is provided with one of the first optical fiber sensors.

16. The medical catheter of claim 15, wherein: The medical catheter further comprises at least one second optical fiber sensor, and the outer side surface of the deformable body is provided with at least one third groove, each of which is provided with one second optical fiber sensor, and the second optical fiber sensor is used to measure the temperature of the deformable body. The at least one second optical fiber sensor and the at least three first optical fiber sensors are spaced apart around the circumference of the deformable body. The medical catheter further comprises an optoelectronic connector and a plurality of transmission optical fibers, the number of the transmission optical fibers is equal to the sum of the number of the first optical fiber sensors and the number of the second optical fiber sensors, and each of the first optical fiber sensors and each of the second optical fiber sensors is connected to one end of the optoelectronic connector through one of the transmission optical fibers, and the other end of the optoelectronic connector is formed with an interface, the number of the interface is one, and the interface is used to output the measurement information of force and the measurement information of temperature.

17. The medical catheter of claim 16, wherein: Each of the first optical fiber sensors corresponds to one of the transmission optical fibers and is integrally formed with the transmission optical fiber. Each of the second optical fiber sensors corresponds to one of the transmission optical fibers and is integrally formed with the transmission optical fiber.

18. The medical catheter of any one of claims 1 to 7 or 10 or 11, wherein: The first optical fiber sensor comprises a first grating segment, a first optical fiber segment and a second optical fiber segment, the two ends of the first grating segment are connected to the first optical fiber segment and the second optical fiber segment respectively, the first optical fiber segment is bonded to the deformable body by glue, and the second optical fiber segment is bonded to the deformable body by glue.

19. The medical catheter of any one of claims 1 to 7 or 10 or 11, wherein: The deformable body and the first optical fiber sensor are arranged in the tube body.

20. A medical catheter, characterized by: It comprises: a tube body having a distal end for insertion into a patient's body; a deformable body arranged at the distal end of the tube body; a first optical fiber sensor arranged on the deformable body for measuring the force received by the deformable body; wherein the outer side of the deformable body is provided with a plurality of first grooves arranged at intervals, at least one of the first grooves extends in a non-helical manner, and the first groove has a first end and a second end away from the first end, the first end and the second end are arranged in a staggered manner in the axial direction of the deformable body, and the first end and the second end are arranged in a staggered manner in the circumferential direction of the deformable body.

21. The medical catheter of claim 20, wherein: The first groove extends from the first end in a stepped manner or in a wavy manner or in a zigzag manner to the second end; and / or, the first groove comprises a plurality of sequentially connected sub-grooves, each of the sub-grooves comprises a first groove segment, a second groove segment and a connecting groove segment, the connecting groove segment is bent or curvedly connected between the first groove segment and the second groove segment, wherein the first groove segment and the second groove segment satisfy at least one of the following conditions: the extension direction of the first groove segment is different from the extension direction of the second groove segment, the inclination angle of the first groove segment relative to an axial end surface of the deformable body is different from the inclination angle of the second groove segment relative to the axial end surface, and the bending curvature of the first groove segment is different from the bending curvature of the second groove segment.

22. The medical catheter of claim 20, wherein: The outer side of the deformable body is further provided with a second groove, and the first optical fiber sensor is arranged in the second groove and passes through part of at least one of the first grooves.

23. The medical catheter of any one of claims 20 to 22, wherein: The number of the first optical fiber sensors is at least three, the outer side of the deformable body is provided with at least three second grooves, the at least three second grooves are arranged at intervals in the circumferential direction of the deformable body, and each of the second grooves is provided with one of the first optical fiber sensors; The medical catheter further comprises at least one second optical fiber sensor, the outer side of the deformable body is provided with at least one third groove, each of the third grooves is provided with one of the second optical fiber sensors, and the second optical fiber sensor is used for measuring the temperature of the deformable body; The at least one second optical fiber sensor and the at least three first optical fiber sensors are arranged at intervals in the circumferential direction of the deformable body; The medical catheter further comprises an optoelectronic connector and a plurality of transmission optical fibers, the number of the transmission optical fibers is equal to the sum of the number of the first optical fiber sensors and the number of the second optical fiber sensors, each of the first optical fiber sensors and each of the second optical fiber sensors is connected to one end of the optoelectronic connector through one of the transmission optical fibers, the other end of the optoelectronic connector is formed with an interface, the number of the interface is one, and the interface is used for outputting the measurement information of the force and the measurement information of the temperature.

24. The medical catheter of any one of claims 20 to 22, wherein: The first fiber sensor comprises a first grating segment, a first fiber segment and a second fiber segment, two ends of the first grating segment are connected to the first fiber segment and the second fiber segment respectively, the first fiber segment is bonded to the deformable body by glue, and the second fiber segment is bonded to the deformable body by glue.

25. A medical catheter, characterized by: Comprise: a tube body having a distal end for insertion into a patient; a deformable body provided at the distal end of the tube body; a first optical fiber sensor disposed on the deformable body ， for measuring a force experienced by the deformable body; wherein the outer side of the deformable body is provided with a plurality of first grooves distributed at intervals, at least one of the first grooves comprises a plurality of sequentially connected sub-grooves, each of the sub-grooves comprises a first groove segment, a second groove segment and a connecting groove segment, the connecting groove segment is bent or curvedly connected between the first groove segment and the second groove segment; the first groove segment and the second groove segment satisfy at least one of the following conditions: the extension direction of the first groove segment is different from the extension direction of the second groove segment, the inclination angle of the first groove segment relative to an axial end face of the deformable body is different from the inclination angle of the second groove segment relative to the axial end face, and the bending curvature of the first groove segment is different from the bending curvature of the second groove segment.

26. The medical catheter of claim 25, wherein: the extension direction of the first groove segment is different from the extension direction of the second groove segment, which includes that the first groove segment and the second groove segment both extend along a curved trajectory, and the bending direction of the first groove segment is different from the bending direction of the second groove segment; or the first groove segment and the second groove segment both extend along a broken line trajectory, and the bending direction of the first groove segment is different from the bending direction of the second groove segment; or one of the first groove segment and the second groove segment extends along a straight line trajectory, and the other one extends along a curved trajectory; or one of the first groove segment and the second groove segment extends along a straight line trajectory, and the other one extends along a broken line trajectory; or one of the first groove segment and the second groove segment extends along a curved trajectory, and the other one extends along a broken line trajectory; or the inclination angle of the first groove segment relative to an axial end face of the deformable body is different from the inclination angle of the second groove segment relative to the axial end face of the deformable body, which includes that the first groove segment and the second groove segment both extend along a straight line trajectory, and the inclination angle of the first groove segment relative to an axial end face of the deformable body is different from the inclination angle of the second groove segment relative to the axial end face of the deformable body; or the bending curvature of the first groove segment is different from the bending curvature of the second groove segment, which includes that the first groove segment and the second groove segment both extend along a curved trajectory, and the bending curvature of the first groove segment is different from the bending curvature of the second groove segment.

27. The medical catheter of claim 26, wherein: the first groove segment and the second groove segment both extend along a straight line trajectory, and one of the first groove segment and the second groove segment has an inclination angle relative to an axial end face of the deformable body greater than or equal to 0° and less than 45°, and the other one has an inclination angle relative to the axial end face greater than or equal to 45° and less than or equal to 90°; Alternatively, the first groove segment and the second groove segment both extend along a straight trajectory, and one of the first groove segment and the second groove segment has an inclination angle relative to an axial end surface of the deformable body greater than or equal to 0° and less than 45°, and the other has an inclination angle relative to the axial end surface greater than 90° and less than 180°.

28. The medical catheter of any one of claims 25 to 27, wherein: The number of the first fiber sensors is at least three, and the outer side surface of the deformable body is provided with at least three second grooves which are spaced apart around the circumference of the deformable body, and each of the second grooves is provided with one of the first fiber sensors. The medical catheter further comprises at least one second fiber sensor, and the outer side surface of the deformable body is provided with at least one third groove, and each of the third grooves is provided with one of the second fiber sensors, and the second fiber sensor is used for measuring the temperature of the deformable body. The at least one second fiber sensor and the at least three first fiber sensors are spaced apart around the circumference of the deformable body. The medical catheter further comprises an optoelectronic connector and a plurality of transmission optical fibers, the number of the transmission optical fibers is equal to the sum of the number of the first fiber sensors and the number of the second fiber sensors, and each of the first fiber sensors and each of the second fiber sensors is connected to one end of the optoelectronic connector through one of the transmission optical fibers, and the other end of the optoelectronic connector is formed with an interface, the number of the interface is one, and the interface is used for outputting the measurement information of force and the measurement information of temperature.

29. The medical catheter of any one of claims 25 to 27, wherein: The first fiber sensor comprises a first grating segment, a first optical fiber segment and a second optical fiber segment, two ends of the first grating segment are connected to the first optical fiber segment and the second optical fiber segment respectively, the first optical fiber segment is bonded to the deformable body by glue, and the second optical fiber segment is bonded to the deformable body by glue.

30. A medical catheter, characterized by: Comprise: a tube body having a distal end for insertion into a patient; a deformable body provided at the distal end; a first fiber sensor provided on the deformable body for measuring a force received by the deformable body; wherein an outer side surface of the deformable body is provided with a plurality of first grooves spaced apart, and at least one of the first grooves extends in a stepped manner or in a wavy manner or in a sawtooth manner along an axial direction of the deformable body and rotates around a circumference of the deformable body.

31. The medical catheter of claim 30, wherein: The outer side surface of the deformable body is further provided with a second groove, and the first fiber sensor is arranged in the second groove and passes through a part of the at least one first groove.

32. The medical catheter according to claim 30 or 31, wherein: The number of the first fiber sensors is at least three, and the outer side surface of the deformable body is provided with at least three second grooves which are spaced apart around the circumference of the deformable body, and each of the second grooves is provided with one of the first fiber sensors. The medical catheter further comprises at least one second fiber sensor, and the outer side surface of the deformable body is provided with at least one third groove, and each of the third grooves is provided with one of the second fiber sensors, and the second fiber sensor is used for measuring the temperature of the deformable body. The at least one second fiber sensor and the at least three first fiber sensors are spaced apart around the circumference of the deformable body. The at least one second fiber sensor and the at least three first fiber sensors are spaced apart around the circumference of the deformable body. The medical catheter further comprises an optoelectrical connector and a plurality of transmission optical fibers, the number of the transmission optical fibers is equal to the sum of the number of the first fiber sensors and the number of the second fiber sensors, and each of the first fiber sensors and each of the second fiber sensors is connected to one end of the optoelectrical connector through one of the transmission optical fibers, the other end of the optoelectrical connector is formed with an interface, the number of the interface is one, and the interface is used to output the measured information of force and the measured information of temperature.

33. The medical catheter according to claim 30 or 31, wherein: The first fiber sensor comprises a first grating segment, a first optical fiber segment and a second optical fiber segment, two ends of the first grating segment are connected to the first optical fiber segment and the second optical fiber segment respectively, the first optical fiber segment is bonded to the deformable body by glue, and the second optical fiber segment is bonded to the deformable body by glue.

34. A medical catheter, characterized by: Comprise: a tube body having a distal end for insertion into a patient; a deformable body provided at the distal end; a first fiber sensor provided on the deformable body for measuring force received by the deformable body; wherein an outer side of the deformable body is provided with a plurality of first grooves spaced apart, the first grooves have a first end portion and a second end portion away from the first end portion, the first end portion and the second end portion are arranged in a staggered manner in the axial direction of the deformable body, and the first end portion and the second end portion are arranged in a staggered manner in the circumferential direction of the deformable body, at least one of the first grooves extends from the first end portion in a stepped manner or in a wavy manner or in a zigzag manner to the second end portion.

35. The medical catheter of claim 34, wherein: The outer side of the deformable body is further provided with a second groove, and the first fiber sensor is arranged in the second groove and passes through part of the at least one first groove.

36. The medical catheter according to claim 34 or 35, wherein: The number of the first fiber sensors is at least three, the outer side of the deformable body is provided with at least three second grooves, the at least three second grooves are spaced apart around the circumference of the deformable body, and each of the second grooves is provided with one of the first fiber sensors; The medical catheter further comprises at least one second fiber sensor, the outer side of the deformable body is provided with at least one third groove, each of the third grooves is provided with one of the second fiber sensors, and the second fiber sensor is used to measure the temperature of the deformable body; The at least one second fiber sensor and the at least three first fiber sensors are spaced apart around the circumference of the deformable body. The medical catheter further comprises an optoelectrical connector and a plurality of transmission optical fibers, the number of the transmission optical fibers is equal to the sum of the number of the first fiber sensors and the number of the second fiber sensors, and each of the first fiber sensors and each of the second fiber sensors is connected to one end of the optoelectrical connector through one of the transmission optical fibers, the other end of the optoelectrical connector is formed with an interface, the number of the interface is one, and the interface is used to output the measured information of force and the measured information of temperature.

37. The medical catheter of claims 34 or 35, wherein: The first fiber sensor comprises a first grating segment, a first fiber segment and a second fiber segment, two ends of the first grating segment are connected to the first fiber segment and the second fiber segment respectively, the first fiber segment is bonded to the deformable body by glue, and the second fiber segment is bonded to the deformable body by glue.

38. A medical catheter, characterized by: Comprise: a tube body having a distal end for insertion into a patient; a deformable body provided at the distal end of the tube body; a first fiber sensor provided on the deformable body for measuring the force received by the deformable body; a second fiber sensor provided on the deformable body for measuring the temperature of the deformable body; wherein the number of first fiber sensors is at least three; the number of second fiber sensors is at least one; the at least one second fiber sensor and the at least three first fiber sensors are spaced apart around the circumference of the deformable body; the medical catheter further comprises an optoelectronic connector and a plurality of transmission optical fibers, the number of transmission optical fibers is equal to the sum of the number of first fiber sensors and the number of second fiber sensors, and each first fiber sensor and each second fiber sensor is connected to one end of the optoelectronic connector through one transmission optical fiber, the other end of the optoelectronic connector is formed with an interface, the number of interfaces is one, and the interface is used to output the measured information of force and temperature.

39. The medical catheter of claim 38, wherein: The outer side of the deformable body is further provided with at least three second grooves, each first fiber sensor is arranged in one second groove; and / or, the outer side of the deformable body is further provided with at least one third groove, each second fiber sensor is arranged in one third groove.

40. The medical catheter according to claim 38 or 39, wherein: The first fiber sensor comprises a first grating segment, a first fiber segment and a second fiber segment, two ends of the first grating segment are connected to the first fiber segment and the second fiber segment respectively, the first fiber segment is bonded to the deformable body by glue, and the second fiber segment is bonded to the deformable body by glue.

41. An ablation instrument, characterized by: Comprise: the medical catheter of any one of claims 1 to 40; a host computer, one end of the medical catheter away from the deformable body is connected to the host computer; wherein the host computer comprises a housing, a demodulation device, a radio frequency source and a display screen, the demodulation device and the radio frequency source are arranged in the housing, the display screen is at least partially exposed outside the housing, the demodulation device is used to analyze the measured force value of the force measurement information fed back by the medical catheter, the display screen is used to display the measured force value, and the radio frequency source is used to discharge the human body tissue through the medical catheter.

42. The ablation instrument of claim 41, wherein: The number of first fiber sensors is at least three, the outer side of the deformable body is provided with at least three second grooves, the at least three second grooves are spaced apart around the circumference of the deformable body, and each second groove is provided with one first fiber sensor; The medical catheter further comprises at least one second optical fiber sensor, and an outer side of the deformable body is provided with at least one third groove, each of the third grooves is provided with one second optical fiber sensor, and the second optical fiber sensor is used for measuring the temperature of the deformable body; The at least one second optical fiber sensor and the at least three first optical fiber sensors are spaced apart around the circumference of the deformable body; The medical catheter further comprises an optical-electrical connector and a plurality of transmission optical fibers, the number of the transmission optical fibers is equal to the sum of the number of the first optical fiber sensors and the number of the second optical fiber sensors, each of the first optical fiber sensors and each of the second optical fiber sensors is connected to one end of the optical-electrical connector through one of the transmission optical fibers, the other end of the optical-electrical connector is formed with an interface, the number of the interface is one, and the interface is used for outputting the measurement information of the force and the measurement information of the temperature; The ablation instrument further comprises a cable, and two ends of the cable are connected to the interface and the host computer respectively.

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