Rotation speed measuring device for optical coherence tomography imaging catheter

Abstract

The utility model discloses a rotating speed measuring device for an optical coherence tomography imaging catheter, which comprises a base and a photosensitive sensor, a detection cavity and a channel communicated with the detection cavity are formed on the base, the base is arranged in a shading manner at least on the cavity wall of each side of the detection cavity, the channel transversely extends to penetrate through the outer wall of at least one end of the base, and the photosensitive sensor is arranged on the base. A to-be-detected catheter is movably arranged in a penetrating manner until a to-be-detected pipe section of the to-be-detected catheter is driven to be exposed in the detection cavity; the photosensitive sensors are arranged in the detection cavity and located beside the channel at intervals, the sensing faces of the photosensitive sensors face the channel, and sensing signals are triggered when the to-be-detected guide pipe receives light emitted by the to-be-detected pipe section in the rotating process of the to-be-detected guide pipe. The detection structure and the detection operation can be simplified, and the detection accuracy can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument detection technical field, concretely relates to a kind of rotational speed measuring device for optical coherence tomography imaging catheter. BACKGROUND

[0002] Optical coherence tomography (Optical Coherence Tomography, OCT) is a kind of non-invasive imaging technology, which uses near-infrared light to obtain high-resolution images inside biological tissues. OCT technology can be applied in the treatment of heart blood vessels, etc. Generally, medical equipment based on OCT technology includes an imaging catheter and a drive module. Traditional OCT imaging catheters generally include an imaging probe and a catheter cavity. The imaging probe mainly includes a developing ring, an optical fiber, a pull wire, a torque tube and an optical fiber connector. The optical fiber functions as a light beam transmission and signal collection. The optical fiber is protected by the pull wire, and the optical fiber is rotated by the pull wire during high-speed rotation. The farthest end of the pull wire is provided with a developing ring for tracking the position of the imaging point in the blood vessel in real time under X-ray. The torque tube provides force transmission for high-speed rotation of the pull wire. The optical fiber connector at the proximal end is used to realize mechanical docking and optical fiber alignment between the imaging catheter and the motion control part, and is powered by the motion control part to drive the imaging probe to complete the functions of rotation and withdrawal.

[0003] In actual application, since the torque tube is generally a thin metal spring tube, it is easy to lose force during the transmission from the proximal to the distal end in the high-speed rotation state, resulting in a possible deviation in the rotational speed of different pipe sections of the imaging catheter from the proximal to the distal end. If the above deviation can be accurately measured, it will help to improve the overall use quality through subsequent structural improvement or algorithm compensation. SUMMARY

[0004] The main purpose of the utility model is to provide a rotational speed measuring device for optical coherence tomography imaging catheter, which can more simply and accurately measure the rotational speed of at least one to-be-measured pipe section in the imaging catheter.

[0005] To achieve the above purpose, the utility model provides a rotational speed measuring device for optical coherence tomography imaging catheter, which comprises:

[0006] A base is formed with a detection cavity and a channel communicating with the detection cavity, the base is provided with light shielding at least at each side cavity wall of the detection cavity, and the channel extends transversely to at least one end outer wall of the base to allow the to-be-measured catheter to move through to expose the to-be-measured pipe section in the detection cavity; and

[0007] A photosensitive sensor is arranged in the detection cavity and is located beside the channel, the sensing surface of the photosensitive sensor faces the channel, and the photosensitive sensor triggers a sensing signal when receiving the light emitted from the to-be-detected pipe section during rotation of the to-be-detected pipe section.

[0008] Optionally, the rotational speed measuring device for the optical coherence tomography imaging pipe further comprises a transparent insertion pipe, the inner diameter of the insertion pipe is equivalent to the outer diameter of the to-be-detected pipe, and the insertion pipe is used for allowing the to-be-detected pipe to move therethrough.

[0009] The insertion pipe is fixedly arranged in the channel, or the insertion pipe is movably arranged in the channel in the transverse direction.

[0010] Optionally, the rotational speed measuring device for the optical coherence tomography imaging pipe further comprises a traction structure, the traction structure is arranged outside the base and is connected with a matching structure arranged on the to-be-detected pipe, and the traction structure is movable in the transverse direction under the driving of an external force to drive the to-be-detected pipe to move through the channel.

[0011] Optionally, a first sliding groove is formed in the vertical side wall and / or the longitudinal side wall of the base, and the first sliding groove extends in the transverse direction.

[0012] The matching structure is formed by an iron-containing part of the to-be-detected pipe, the traction structure is slidingly installed in the first sliding groove, and at least a part of the traction structure is made of a magnetic material.

[0013] Optionally, the base comprises:

[0014] A base is provided, a detection groove is formed in the vertical side or the longitudinal side of the base, and the channel is formed in the transverse direction of the base.

[0015] A mounting bracket is arranged in the detection groove and is located beside the channel, a first mounting hole is formed in the mounting bracket and faces the channel, and the first mounting hole is used for fixedly mounting the photosensitive sensor; and

[0016] A cover plate is movably mounted at the opening of the detection groove, and the cover plate cooperates with the base to define the detection groove when the cover plate covers the opening of the detection groove.

[0017] Optionally, a second mounting hole is further formed in the mounting bracket and faces the channel, and the first mounting hole and the second mounting hole are arranged on the longitudinal sides of the channel.

[0018] The rotational speed measuring device for the optical coherence tomography imaging pipe further comprises:

[0019] a laser emitter fixedly installed at the second mounting hole and having a laser emitting surface configured to emit laser light towards the channel; and

[0020] a reflective film layer fixedly arranged at a radial side of the pipe segment to be measured so as to reflect the laser light emitted by the laser emitter to the sensing surface of the photosensitive sensor when the pipe segment to be measured is rotated to receive the laser light.

[0021] Optionally, the mounting bracket further comprises a first window between the first mounting hole and the second mounting hole, and a first positioning mark arranged beside the first window, the first positioning mark being configured to position the reflective film layer movably arranged at the first window.

[0022] Optionally, the base further comprises a second window arranged at a lateral side of the detection groove, and a second positioning mark arranged beside the second window, the second positioning mark being configured to position the pipe segment to be measured movably arranged in the channel.

[0023] Optionally, the base further comprises a second sliding groove arranged at each lateral side of the detection groove and extending to the second window in a lateral direction.

[0024] The cover plate is slidably installed at the second sliding groove.

[0025] Optionally, the base further comprises a mounting groove arranged at a lateral side of the detection groove, the mounting groove being provided with a through hole communicating with the detection groove.

[0026] The rotational speed measurement device for the optical coherence tomography imaging catheter further comprises a circuit board and a connecting cable, the circuit board being fixedly installed at the mounting groove, and at least part of the connecting cable being arranged through the through hole and connected to the circuit board and the photosensitive sensor.

[0027] The utility model provides a technical scheme provided by the utility model discloses when needing to measure the rotating speed of the to be measured pipe section of the to be measured catheter, first, the to be measured catheter is arranged in the through -hole, makes the to be measured pipe section show in the detection cavity, and is in the induction range of photosensitive inductor. Then the operation and the external drive module of to be measured catheter drive connection start running, drive to be measured pipe section rotates around the own axis. In the rotating process, the light directly emitted by the light source device fixed at the preset side wall of to be measured pipe section or the light reflected after the preset side wall of to be measured pipe section emits the light of external light source device can be received periodically by the sensing surface of photosensitive inductor, so that photosensitive inductor can regularly trigger at least one induction signal when to be measured pipe section rotates a week. The induction signal can be used for comparison analysis with the output signal of external drive module subsequently, and finally obtains the deviation data between the output rotating speed of external drive module and the actual rotating speed at to be measured pipe section. Since the photosensitive inductor is spaced apart from the to be measured catheter, non-contact detection can be realized. Compared with contact detection, the application helps to eliminate the adverse load of the detector on the to be measured pipe section during rotation, and in combination with the light shielding arrangement at the detection cavity, the light can be more accurately and efficiently sensed by the photosensitive inductor. The application helps to simplify the detection structure and operation, and improve the detection accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can obtain other drawings from the structures shown in the drawings without creating labor.

[0029] Figure 1 It is the main structure exploded schematic view of the first embodiment of the rotating speed measuring device for optical coherence tomography imaging catheter provided by the utility model;

[0030] Figure 2 It is Figure 1 It is the top view schematic view of the rotating speed measuring device for optical coherence tomography imaging catheter in the embodiment;

[0031] Figure 3 It is Figure 2 It is the sectional structure schematic view of A-A in the embodiment;

[0032] Figure 4 It is the main structure exploded schematic view of the second embodiment of the rotating speed measuring device for optical coherence tomography imaging catheter provided by the utility model;

[0033] Figure 5 It is Figure 4Fig. 1 is a top view of a schematic diagram of a rotational speed measuring device for an optical coherence tomography imaging catheter;

[0034] Figure 6 For Figure 5 Fig. 2 is a schematic diagram of a cross-sectional structure at B-B;

[0035] Figure 7 For Figure 4 Fig. 3 is a schematic diagram of a perspective view of a mounting bracket;

[0036] Figure 8 For Figure 4 Fig. 4 is a schematic diagram of a side view of the mounting bracket.

[0037] BRIEF DESCRIPTION OF DRAWINGS

[0038] 100 base; 101 detection cavity; 110 base; 111 detection groove; 112 passage; 113 first sliding groove; 114 second window; 115 second positioning mark; 116 second sliding groove; 117 mounting groove; 118 through hole; 120 mounting bracket; 121 first mounting hole; 122 second mounting hole; 123 first window; 124 first positioning mark; 130 cover plate; 200 cannula; 300 traction structure.

[0039] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0041] It should be noted that if the present application embodiments involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0042] In addition, if the description of "first", "second" and the like is involved in the embodiments of the utility model, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. For example, "A and / or B" includes A scheme, or B scheme, or A and B simultaneously meet the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, also not within the protection scope required by the utility model.

[0043] Please refer to Figures 1 to 8 The utility model provides a kind of rotational speed measuring device for optical coherence tomography imaging catheter (hereinafter referred to as rotational speed measuring device, and optical coherence tomography imaging catheter is referred to as measured catheter).

[0044] It can be understood that, in actual application, optical coherence tomography imaging catheter is drivenly connected with driving module, so as to be rotated around its own axis under the driving of driving module. When carrying out rotational speed detection operation, similarly, the proximal section of measured catheter is drivenly connected with driving module, and by collecting the output data (such as the output data of encoder) of driving module, the first rotation angle of the proximal section of measured catheter can be accurately obtained. The rotational speed measuring device provided by the present application is mainly used for measuring the rotation angle of any pipe section (i.e. measured pipe section) of the distal section of measured catheter, to obtain the second rotation angle. By comparing the second rotation angle and the first rotation angle, whether the rotational speed of measured pipe section exists deviation and whether the deviation amount exceeds the preset deviation threshold can be known.

[0045] For the convenience of understanding, in the following embodiments, the rotational speed measuring device as a whole is defined to have transverse, longitudinal and vertical directions which are arranged in cross. Among them, the transverse direction generally corresponds to the extension direction of the measured catheter.

[0046] In view of the above, the rotating speed measurement device of the optical coherence tomography imaging catheter specifically comprises a base 100 and a photosensitive sensor. The base 100 is formed with a detection cavity 101 and a channel 112 communicating with the detection cavity 101, the base 100 is provided with light shielding at least at each side cavity wall of the detection cavity 101, and the channel 112 extends laterally to at least one end outer wall of the base 100 to allow the catheter to be movably arranged through the channel 112 so that the to-be-measured pipe section of the catheter is exposed in the detection cavity 101; the photosensitive sensor is arranged in the detection cavity 101 and is spaced apart from the side of the channel 112, the sensing surface of the photosensitive sensor faces the channel 112, and the photosensitive sensor triggers an induction signal when receiving the light emitted by the to-be-measured pipe section during rotation of the to-be-measured pipe section.

[0047] In the technical scheme, when the rotating speed of the to-be-measured pipe section of the to-be-measured catheter needs to be measured, the to-be-measured catheter is arranged through the channel 112, so that the to-be-measured pipe section is exposed in the detection cavity 101 and is within the sensing range of the photosensitive sensor. Then, the external driving module connected with the to-be-measured catheter is started to drive the to-be-measured pipe section to rotate around the axis. During the rotation, the light directly emitted by the light source device arranged at the preset side wall of the to-be-measured pipe section or the light reflected by the preset side wall of the to-be-measured pipe section to the external light source device is periodically received by the sensing surface of the photosensitive sensor, so that the photosensitive sensor can regularly trigger at least one induction signal (for example, a relatively strong signal formed when the light is substantially perpendicular to the sensing surface, which is used as an induction signal) when the to-be-measured pipe section rotates one revolution. The induction signal can be used for comparison and analysis with the output signal of the external driving module, and finally the deviation data between the output rotating speed of the external driving module and the actual rotating speed of the to-be-measured pipe section is obtained. Since the photosensitive sensor is spaced apart from the to-be-measured catheter, non-contact detection can be achieved. Compared with contact detection, the application can help to eliminate the adverse load of the detector on the to-be-measured pipe section during rotation; and in combination with the light shielding arrangement at the detection cavity 101, the light can be more accurately and efficiently sensed by the photosensitive sensor. The application can help to simplify the detection structure and operation and improve the detection accuracy.

[0048] In the present application, the specific form of the base 100 is not limited, which can be but is not limited to a block structure as shown in Figures 1 to 8 The base 100 can be formed in any way to form the detection cavity 101 and / or the channel 112, for example, it can be formed by an integral injection molding process. Alternatively, the base 100 can be provided to include at least two single bodies that are detachably connected, and when the single bodies are connected, the detection cavity 101 and / or the channel 112 can be defined. When at least one single body is detached, the detection cavity 101 and / or the channel 112 are opened, facilitating the disassembly and replacement of the photosensitive sensor and the like.

[0049] As Figures 1 to 8 shown in the embodiment, the base 100 comprises a base 110, a mounting bracket 120 and a cover plate 130. Among them, the vertical side or longitudinal side of the base 110 is provided with a detection groove 111, and the base 110 is provided with a channel 112 along the transverse direction; the mounting bracket 120 is arranged in the detection groove 111 and located beside the channel 112, the first mounting hole 121 is provided in the mounting bracket 120 towards the channel 112, and the first mounting hole 121 is used for fixing and installing the photosensitive sensor; the cover plate 130 is hingedly installed at the slot opening of the detection groove 111, and when the slot opening of the detection groove 111 is closed, it cooperates with the base 110 to define the detection groove 111.

[0050] The base 110 is used to place the rotational speed measuring device at a position adjacent to the driving module. As known from the above, the transverse direction generally corresponds to the extension direction of the measured pipe during the detection process. Then in a specific application, when the base 110 is placed on a horizontal surface such as a platform or a table top, the measured pipe extends along the horizontal direction and rotates. At this time, the base 110 can be provided with structures for easy placement on the horizontal surface according to actual needs, such as quick connection structure, anti-slip structure, walking structure, etc. In another specific application, the base 110 can be hung on a vertical surface, at this time the measured pipe extends along the direction of gravity and rotates, compared with the scheme of extending along the horizontal direction, it helps to reduce the adverse effects of local lateral bending deformation of the measured pipe segment due to the influence of gravity on normal rotation. At this time, for the same reason, the base 110 can be provided with structures for easy placement on the vertical surface according to actual needs, such as hanging structure, anti-shaking structure, etc. Of course, in another application, the operator can directly hold the base 110 to perform rotational speed detection operation, then at this time the base 110 can be provided with a holding structure according to actual needs, such as setting the overall shape of the base 110 to be a handle or a gun body, etc., without limitation.

[0051] The mounting bracket 120 is mainly used to limit the installation of the photosensitive sensor in the detection groove 111; and the cover plate 130 is mainly used to close the slot opening of the detection groove 111 and define the detection cavity 101. Based on this, for example Figures 1 to 3 As shown in the structure, the mounting bracket 120 and the cover plate 130 can be integrally formed as one part. When the photosensitive sensor is installed at the first mounting hole 121, the sensing surface of the photosensitive sensor faces the inside of the detection groove 111, and the remaining part of the photosensitive sensor is enough to cover the first mounting hole 121, ensuring that the photosensitive sensor and the mounting bracket 120 as a whole can achieve the purpose of closing the cover plate 130. Or as Figures 4 to 8 As shown in the structure, the mounting bracket 120 and the cover plate 130 can be separately provided as two parts, and the two parts can be independent and not interfere with each other, or can be detachably or non-detachably connected.

[0052] The mounting bracket 120 and / or the cover plate 130 are generally configured to be detachably connected to the base 110, but the specific disassembly manner is not limited, for example, the mounting bracket 120 can be clamped and fixed in the detection groove 111 by size design, or be screw-fixed in the detection groove 111 by screws and the like. The cover plate 130 is the same. In a specific embodiment, the base 110 is provided with a second sliding groove 116 on both sides of the groove width of the detection groove 111; the cover plate 130 can be slidably mounted in the second sliding groove 116, which facilitates the opening and closing movement of the cover plate 130 relative to the slot opening of the detection groove 111, and ensures that the cover plate 130 is not easily separated from the base 110, avoiding the loss of parts.

[0053] In addition, after the detection cavity 101 is defined as described above, at least the side cavity walls of the detection cavity 101 are provided with light shielding to form a dark environment in the detection cavity 101 to prevent external light sources from affecting the sensing of the photosensitive sensor. Specifically but not limitedly, the base 110 and the cover plate 130 can be made of light shielding material as a whole or in part. When the base 110 and the cover plate 130 are made of light-transmitting material, a light shielding material layer can be provided on the inner cavity surface of the detection cavity 101 and / or the outer surface of the base 110 / cover plate 130. The light shielding material layer can be a light shielding paint coated on the above-mentioned surfaces, a light shielding film layer attached to the above-mentioned surfaces, etc. When the light shielding material layer is not limited to be connected and fixed with the above-mentioned surfaces or integrally formed, the light shielding material layer can be further movably arranged relative to the base 110 and / or the cover plate 130, having a light shielding state when covering the above-mentioned surfaces and a light-transmitting state when being detached from the above-mentioned at least one surface. When in the light-transmitting state, the light-transmitting part can facilitate the operator to visually check, for example, whether the photosensitive sensor is installed in place, whether the insertion of the to-be-measured conduit in the channel 112 is deformed, whether the position of the to-be-measured pipe section at the detection cavity 101 meets the requirements, etc.

[0054] As described above, the photosensitive sensor is used to receive light emitted by the to-be-measured pipe section when rotating through a side wall:

[0055] Specifically, in an embodiment, when the to-be-measured pipe section is a distal section of an imaging conduit, a light source device (such as a light-emitting part of an optical fiber) is fixed at the distal section of the imaging conduit, and the light source device emits light laterally from a radial side of the imaging conduit. That is, light can be directly emitted periodically toward the photosensitive sensor during rotation to complete the sensing process. Therefore, in this scenario, only the photosensitive sensor needs to be started.

[0056] Or in another embodiment, when the pipe section to be measured is specifically the middle section of the imaging catheter, that is, the pipe section to be measured cannot directly emit light, further, the rotating speed measuring device for the optical coherence tomography imaging catheter further comprises a laser emitter and a reflective film layer. At this time, the laser emitter is fixedly installed in the detection cavity 101, and the emitting surface of the laser emitter can emit laser towards the channel 112; the reflective film layer is used to be fixedly arranged on the radial side of the pipe section to be measured, so as to reflect the laser emitted by the laser emitter to the sensing surface of the photosensitive sensor when the pipe section to be measured is driven to rotate. By arranging the reflective film layer, the specific position of the pipe section to be measured can be indicated. When the pipe section to be measured drives the reflective film layer to be arranged in place and rotates, the reflective film layer can periodically reflect the laser emitted by the laser emitter, and the reflected light can be received by the photosensitive sensor. Therefore, in this case, the laser emitter and the photosensitive sensor need to be controlled to start running.

[0057] When the mounting bracket 120 is arranged as described above, the mounting bracket 120 is further provided with a second mounting hole 122 penetrating towards the channel 112, and the first mounting hole 121 and the second mounting hole 122 are arranged on the longitudinal two sides of the channel 112. Specifically, refer to Figures 7 to 8 , the mounting bracket 120 can be specifically arranged as a curved structure spanning the two sides of the channel 112 in the longitudinal direction, having a middle bracket section arranged corresponding to the channel 112, and two outer bracket sections arranged on the longitudinal two sides of the middle bracket section, and the first mounting hole 121 and the second mounting hole 122 are arranged at the two outer bracket sections, and in order to make the laser emitted by the laser reflector better received by the photosensitive sensor after being reflected by the reflective film layer, the two outer bracket sections can be arranged at an angle, and the specific angle value is not limited, for example, it can be specifically 90°.

[0058] Further, the mounting bracket 120 is further provided with a first window 123 between the first mounting hole 121 and the second mounting hole 122, and a first positioning mark 124 is arranged beside the first window 123, which is used to position the reflective film layer movably penetrating the first window 123. That is, the first window 123 is arranged at the middle bracket section, which is a window structure that can be visually observed by the operator, which can be a directly hollowed hole structure, or a structure covered with a transparent cover at the hole structure, or the middle bracket section of the mounting bracket 120 is made of transparent material to directly form the first window 123. The first window 123 can be used by the operator to visually check whether the position of the reflective film layer of the pipe section to be measured in the detection cavity 101 is arranged in place. The first positioning mark 124 is mainly used to indicate the accurate arrangement position of the reflective film layer, which can be but is not limited to pattern mark, text mark, color mark, etc.

[0059] Furthermore, to make the on / off control of the photosensor and laser emitter more convenient and intelligent, and to better receive the sensor signals from the photosensor, in one embodiment, the base 110 also has a mounting groove 117 on one side of the detection groove 111. The mounting groove 117 has a through hole 118 communicating with the detection groove 111. The rotation speed measuring device for the optical coherence tomography imaging guide tube also includes a circuit board and connecting cables. The circuit board is fixedly mounted in the mounting groove 117, and at least part of the connecting cables pass through the through hole 118 and connect the circuit board and the photosensor. The circuit board can compile relevant programs according to actual needs, such as the aforementioned switching programs for the photosensor and laser emitter, and the programs for transmitting and receiving the sensor signals from the photosensor. The connecting cables are routed through the through hole 118 to better connect the circuit board and the photosensor and laser reflector. The remaining connecting cables can be routed on the other side, for example, by forming a wiring hole through the outer wall of the base 110 on one side of the mounting groove 117, and leading the connecting cables outward through the wiring hole.

[0060] Furthermore, based on one or more of the above embodiments, it can be understood that the catheter under test can be directly inserted into the channel 112. Alternatively, in another design, the rotation speed measuring device for the optical coherence tomography imaging catheter also includes a transparent insert 200, the inner diameter of which is approximately equal to the outer diameter of the catheter under test, for the catheter to be inserted flexibly. The insert 200 helps to reduce the molding quality requirements at the channel 112 on the base 100; at the same time, the insert 200 facilitates the insertion of the catheter under test. Without the insert 200, the catheter under test would deform upon reaching, for example, the detection cavity 101, and might bend within the detection cavity 101, affecting the detection data. Specifically, for example, the insert 200 can be directly constructed from a glass tube, possessing both sufficient structural strength and meeting the transparency requirement. Furthermore, the inner and outer walls of the glass tube are relatively smoother, which facilitates the insertion of the cannula 200 within the channel 112 and the insertion of the catheter under test within the cannula 200. It also helps to reduce the probability of localized bending or deformation of the catheter under test due to excessive interference between the catheter under test and the inner wall during insertion.

[0061] Next, the cannula 200 can be fixedly inserted into the channel 112, so that each time a test is performed, only the step of inserting the catheter to be tested into the cannula 200 is required.

[0062] Or the cannula 200 is movably adjusted along the transverse direction to be arranged at the passage 112. In this way, according to actual needs, the step of first operating the to-be-tested catheter to be inserted into the cannula 200 outside the passage 112, with the aid of the transparent visualization of the cannula 200, can help to better achieve the insertion of the to-be-tested catheter, so that after the to-be-tested catheter is completely or preliminarily inserted into the cannula 200, the cannula 200 and the to-be-tested catheter are jointly inserted into the passage 112. Of course, when the rotational speed of different to-be-tested pipe sections of the same to-be-tested catheter needs to be measured, the to-be-tested pipe section currently needed to be measured can also be moved into position by operating the transverse movement adjustment of the cannula 200 at the passage 112. Based on this, further, a locking structure can be arranged between the cannula 200 and the base 110, and the locking structure has a locked state and an unlocked state. When the cannula 200 and / or the to-be-tested catheter need to be moved and adjusted, the locking structure is operated to be in the unlocked state; when the to-be-tested pipe section that has been adjusted to position needs to be measured, the locking structure is operated to be in the locked state. The locking structure can be, but is not limited to, a magnetic attraction structure that realizes mutual switching between the locked state and the unlocked state through magnetic attraction; it can also be a gear and a rack that realize mutual switching between the locked state and the unlocked state through meshing, and the like.

[0063] In addition, also in order to be able to measure the rotational speed of different to-be-tested pipe sections of the same to-be-tested catheter, when the detection cavity 101 is long enough along the transverse direction, at least one of the light-sensitive sensor, the laser emitter, and the mounting bracket 120 can be movably adjusted along the transverse direction. By adjusting the transverse position of the light-sensitive sensor, the laser emitter, and / or the mounting bracket 120, the to-be-tested catheter can be avoided to be moved, and the purpose of measuring the rotational speed of different to-be-tested pipe sections of the same to-be-tested catheter can be achieved. The driving force of the transverse movement adjustment can be manually operated by an operator, or can be automatically operated by a specially arranged power mechanism.

[0064] On the basis of the above, when the relative position of the to-be-tested pipe relative to at least one of the light-sensitive sensor, the laser emitter, and the mounting bracket 120 changes in the transverse direction, further, a positioning structure or a mechanism of a calibration position can be arranged in the detection cavity 101 or outside, to ensure that each relative movement can be accurately positioned. The mechanism of the calibration position can be, but is not limited to, for example, a displacement sensor; the positioning structure can be, but is not limited to, a positioning mark, etc. Specifically, in an embodiment, the base 110 further has a second window 114 on the transverse side of the detection groove 111, and a second positioning mark 115 is arranged beside the second window 114. The second positioning mark 115 is used to position the to-be-tested pipe segment movably arranged in the channel 112. Similarly to the first window 123, the second window 114 is a window structure that can be directly hollowed into a hole structure, or can be a structure covered with a transparent cover, or the corresponding part of the base 110 can be made of transparent material to directly form the second window 114. The second window 114 can be used by the operator to visually check whether the position of the to-be-tested pipe segment in the detection cavity 101 is moved to the right position. The second positioning mark 115 is mainly used to indicate the accurate installation position of the to-be-tested pipe segment, which can be, but is not limited to, a pattern mark, a character mark, a color mark, etc., and is specifically, for example, a scale mark.

[0065] In addition, when the second sliding groove 116 is arranged as described above, the second sliding groove 116 can extend to the second window 114 in the transverse direction. In this way, on the one hand, it helps to reasonably utilize the second window 114 to expand the movement space range of the cover plate 130; on the other hand, it helps to increase the plate surface of the cover plate 130 to be larger than the slot of the detection groove 111, so that the part of the second window 114 close to the detection cavity 101 can be shielded during the detection process, thereby further ensuring the quality of the dark environment in the detection cavity 101.

[0066] In view of the above, the channel 112 can be a single end through the base 100, forming an opening for insertion; or the channel 112 can also be opposite ends through the base 100, forming two openings for insertion or passage. At this time, the length of the insertion tube 200 can be set to be exactly equal to the length of the channel 112, appropriately less than the length of the channel 112, or appropriately greater than the length of the channel 112 so that part of the tube extends outside the opening. For example, when the measurement of the to-be-measured tube segment located in the middle segment is required, the appropriate extension of the insertion tube 200 can accommodate the distal segment of the to-be-measured catheter, accommodate and protect the optical lens and the like arranged at the distal segment of the to-be-measured catheter, and can support the to-be-measured catheter to extend naturally in the transverse direction without generating lateral bending deformation. At this time, at least part of the tube segment of the insertion tube 200 can be arranged to have a transverse extension adjustment function, which can be elongated to extend outside the opening when needed, and retracted to avoid forming an interference protrusion on the outer wall of the base 100 when not needed. The extension adjustment function can be realized by elastic deformation of an elastic material or by structural extension and contraction such as a bellows.

[0067] Based on one or more of the above embodiments, when the to-be-measured catheter needs to be directly passed through the channel 112; or when the insertion tube 200 is fixedly arranged in the channel 112, and the to-be-measured catheter needs to be passed through the insertion tube 200 in the channel 112, further, the rotational speed measurement device for the optical coherence tomography imaging catheter further comprises a traction structure 300, which is arranged outside the base 100 and is connected with the matching structure arranged at the to-be-measured catheter. The traction structure 300 is movable in the transverse direction under the driving of an external force, so as to drive the to-be-measured catheter to move and pass through the channel 112. When the traction structure 300 is connected with the matching structure, the linkage connection between the traction structure 300 and the to-be-measured catheter can be realized. In this way, when the traction structure 300 is driven to move in the transverse direction by the external force, the to-be-measured catheter can be simultaneously driven to move in the transverse direction, thereby ensuring that the to-be-measured catheter is inserted into the channel 112 or the insertion tube 200 in the channel 112. Since the traction structure 300 is directly arranged outside the base 100, the driving of the external force can be directly manually operated by an operator; or can be automatically operated by a specially arranged power component.

[0068] Specifically, in an embodiment, the vertical side outer wall and / or the longitudinal side outer wall of the base 100 is provided with a first sliding groove 113 extending in the transverse direction; the iron-containing part of the catheter to be measured constitutes a matching structure, the traction structure 300 is slidingly installed in the first sliding groove 113, and at least a part of the traction structure 300 is made of a magnetic material. The magnetic material is, for example, a magnet, and the matching structure can be a magnet or a structure containing iron, cobalt and nickel, so that the traction structure 300 and the matching structure can be magnetically attracted and separated. The matching structure can be a structure specially and additionally arranged on the catheter to be measured, or a component inherent to the catheter to be measured and directly constituting the matching structure. For example, when the catheter to be measured contains a metal spring wire, the metal spring wire directly constitutes the matching structure and can be magnetically attracted to the magnetic structure.

[0069] The above description is only preferred embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation made by using the content of the present application and the drawings, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A rotational speed measuring device for an optical coherence tomography imaging catheter, characterized by, The device comprises: a base, which is formed with a detection cavity and a channel communicating with the detection cavity, the base being provided with light shielding at least at each side cavity wall of the detection cavity, the channel extending transversely to at least one end outer wall of the base to allow a catheter to be movably arranged through the channel so that a to-be-detected pipe section of the catheter is exposed in the detection cavity; and a photosensitive sensor, which is arranged in the detection cavity and is spaced apart from the channel, the photosensitive sensor having a sensing surface facing the channel and being triggered to generate a sensing signal when the sensing surface receives light emitted from the to-be-detected pipe section during rotation of the catheter.

2. The rotational speed measuring device for an optical coherence tomography imaging catheter of claim 1, wherein, The device for measuring the rotating speed of the OCT imaging catheter further comprises a transparent insertion tube, which has an inner diameter corresponding to an outer diameter of the to-be-detected catheter, and is used for movably arranging the to-be-detected catheter therethrough. The insertion tube is fixedly arranged in the channel, or is movably arranged in the channel in a transverse direction.

3. The rotational speed measuring device for an optical coherence tomography imaging catheter of claim 1, wherein, The device for measuring the rotating speed of the OCT imaging catheter further comprises a traction structure, which is exposed outside the base and is connected with a cooperating structure arranged on the to-be-detected catheter, and is movable in a transverse direction under an external force to drive the to-be-detected catheter to move through the channel.

4. The rotational speed measuring device for an optical coherence tomography imaging catheter of claim 3, wherein, A first sliding groove is formed in a vertical side outer wall and / or a longitudinal side outer wall of the base and extends in a transverse direction. An iron-containing part of the to-be-detected catheter forms the cooperating structure, the traction structure is slidingly installed in the first sliding groove, and at least a part of the traction structure is made of a magnetic material.

5. The rotational speed measuring device for an optical coherence tomography imaging catheter of claim 1, wherein, The device comprises: a base, which is formed with a detection cavity and a channel communicating with the detection cavity, the base being provided with light shielding at least at each side cavity wall of the detection cavity, the channel extending transversely to at least one end outer wall of the base to allow a catheter to be movably arranged through the channel so that a to-be-detected pipe section of the catheter is exposed in the detection cavity; and a photosensitive sensor, which is arranged in the detection cavity and is spaced apart from the channel, the photosensitive sensor having a sensing surface facing the channel and being triggered to generate a sensing signal when the sensing surface receives light emitted from the to-be-detected pipe section during rotation of the catheter. The device for measuring the rotating speed of the OCT imaging catheter further comprises a transparent insertion tube, which has an inner diameter corresponding to an outer diameter of the to-be-detected catheter, and is used for movably arranging the to-be-detected catheter therethrough.

6. The rotational speed measuring device for an optical coherence tomography imaging catheter of claim 5, wherein, The insertion tube is fixedly arranged in the channel, or is movably arranged in the channel in a transverse direction. The device for measuring the rotating speed of the OCT imaging catheter further comprises a traction structure, which is exposed outside the base and is connected with a cooperating structure arranged on the to-be-detected catheter, and is movable in a transverse direction under an external force to drive the to-be-detected catheter to move through the channel. A first sliding groove is formed in a vertical side outer wall and / or a longitudinal side outer wall of the base and extends in a transverse direction. An iron-containing part of the to-be-detected catheter forms the cooperating structure, the traction structure is slidingly installed in the first sliding groove, and at least a part of the traction structure is made of a magnetic material.

7. The rotational speed measuring device for an optical coherence tomography imaging catheter of claim 6, wherein, The device comprises: a base, which is formed with a detection cavity and a channel communicating with the detection cavity, the base being provided with light shielding at least at each side cavity wall of the detection cavity, the channel extending transversely to at least one end outer wall of the base to allow a catheter to be movably arranged through the channel so that a to-be-detected pipe section of the catheter is exposed in the detection cavity; and a photosensitive sensor, which is arranged in the detection cavity and is spaced apart from the channel, the photosensitive sensor having a sensing surface facing the channel and being triggered to generate a sensing signal when the sensing surface receives light emitted from the to-be-detected pipe section during rotation of the catheter. The device for measuring the rotating speed of the OCT imaging catheter further comprises a transparent insertion tube, which has an inner diameter corresponding to an outer diameter of the to-be-detected catheter, and is used for movably arranging the to-be-detected catheter therethrough. The insertion tube is fixedly arranged in the channel, or is movably arranged in the channel in a transverse direction. The device for measuring the rotating speed of the OCT imaging catheter further comprises a traction structure, which is exposed outside the base and is connected with a cooperating structure arranged on the to-be-detected catheter, and is movable in a transverse direction under an external force to drive the to-be-detected catheter to move through the channel. A first sliding groove is formed in a vertical side outer wall and / or a longitudinal side outer wall of the base and extends in a transverse direction. An iron-containing part of the to-be-detected catheter forms the cooperating structure, the traction structure is slidingly installed in the first sliding groove, and at least a part of the traction structure is made of a magnetic material.

8. The rotational speed measuring device for an optical coherence tomography imaging catheter of claim 5, wherein, The base further has a second window formed on one lateral side of the detection groove, and a second positioning mark is arranged beside the second window, which is used to position the pipe section to be detected which is movably arranged in the channel.

9. The rotational speed measuring device for an optical coherence tomography imaging catheter of claim 8, wherein, The base has a second sliding groove formed on each side of the groove width of the detection groove, which extends to the second window in the lateral direction. The cover plate is slidably arranged in the second sliding groove.

10. The rotational speed measuring device for an optical coherence tomography imaging catheter of claim 5, wherein, The base further has a mounting groove formed on one lateral side of the detection groove, and the mounting groove is provided with a through hole which is communicated with the detection groove. The rotating speed measuring device for the optical coherence tomography imaging catheter further comprises a circuit board and a connecting cable, the circuit board is fixedly arranged in the mounting groove, at least part of the connecting cable is arranged in the through hole and connected with the circuit board and the photosensitive sensor.

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