Percutaneous tunnel-type bendable ultrasonic pulmonary endoscope

Abstract

A percutaneous tunnel-type bendable ultrasonic pulmonary endoscope, comprising an adjustable bent sheath assembly and an ultrasonic puncture assembly (1). The adjustable bent sheath assembly comprises an adjustable bent sheath body (2) and a traction member. The ultrasonic puncture assembly (1) comprises: a puncture rod, the adjustable bent sheath body (2) being coaxially sleeved outside the puncture rod, and the puncture rod being provided with an instrument channel; a split puncture head, the split puncture head being arranged at a distal end of the puncture rod and having an open state and a closed state; an ultrasonic probe (102), the ultrasonic probe (102) being arranged in the instrument channel; and a telescopic control part (103), the telescopic control part (103) being detachably mounted at a proximal end of the puncture rod and driving the ultrasonic probe (102) to move in the instrument channel. When the split puncture head is in the open state, the telescopic control part (103) drives the ultrasonic probe (102) to penetrate out of the split puncture head. The percutaneous tunnel-type bendable ultrasonic pulmonary endoscope can ultrasonically and accurately guide a puncture needle (101) to reach a focus in real time, thereby increasing the diagnosis rate of pulmonary nodules, decreasing the number of punctures (complications) to the maximum extent, and reducing the radiation dose.

Description

A percutaneous tunnel-type flexible ultrasound pulmonary endoscope Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a percutaneous tunnel-type flexible ultrasonic lung endoscope. Background Art

[0002] Lung nodules can be clearly diagnosed through interventional techniques such as bronchoscopy or percutaneous lung puncture. Existing transbronchial biopsy methods are unable or difficult to reach peripheral and extratracheal lesions, and the overall diagnosis rate is low, especially for small peripheral nodules. The supporting equipment is expensive, the operation is complicated, and the technical threshold is high. The percutaneous lung puncture biopsy method also has an unsatisfactory diagnosis rate. The puncture needle used is an inflexible hard needle, which is restricted by respiratory movement during the puncture process. The number of punctures and CT scans required is more, and the patient's radiation dose and lung damage (pneumothorax and bleeding) are greater. Summary of the Invention

[0003] In response to the defects in the existing technology, the purpose of the present invention is to provide a percutaneous tunnel-type flexible ultrasonic pulmonary endoscope, which integrates the functions of puncture, ultrasound guidance, and adjustable bending. The puncture needle can reach the lesion under the real-time and precise guidance of ultrasound, thereby improving the diagnosis rate of lung nodules, minimizing the number of punctures (complications) and reducing the radiation dose. It not only overcomes the shortcomings of bronchoscopes that are unable or difficult to reach peripheral and extratracheal lesions, expensive supporting equipment, and high technical barriers, but also makes up for the inherent defects of percutaneous lung puncture such as the inability to eliminate respiratory activity, the inability to adjust the direction in real time, large puncture damage and high radiation dose.

[0004] The present invention provides a percutaneous tunnel-type flexible ultrasonic pulmonary endoscope, comprising an adjustable curved sheath assembly and an ultrasonic puncture assembly;

[0005] The adjustable bending sheath tube assembly includes an adjustable bending sheath tube body and a traction member; the adjustable bending sheath tube body includes a bending adjustment section, the traction member is connected to the bending adjustment section, and the traction member pulls the bending adjustment section to drive the bending adjustment section to bend;

[0006] The ultrasonic puncture assembly comprises:

[0007] The puncture rod, wherein the adjustable bending sheath body is coaxially sleeved outside the puncture rod, and the puncture rod has an instrument channel;

[0008] A petal-shaped puncture head is provided at the distal end of the puncture rod and is composed of a plurality of elastic conical petals. The petal-shaped puncture head has an open state and a closed state. In the closed state, the petal-shaped puncture head has a conical structure. In the open state, the petal-shaped puncture head has a hollow cylindrical structure with a plurality of conical notches at the distal end.

[0009] an ultrasonic probe, the ultrasonic probe being disposed in the instrument channel;

[0010] A telescopic control portion is detachably mounted on the proximal end of the puncture rod, and the telescopic control portion drives the ultrasonic probe to move within the instrument channel; when the petal-shaped puncture head is in an open state, the telescopic control portion drives the ultrasonic probe to pass through the petal-shaped puncture head.

[0011] In one embodiment of the present invention, the telescopic control unit includes:

[0012] an inner shell of the telescopic portion, the inner shell of the telescopic portion being coaxially sleeved on the outside of the puncture rod;

[0013] An ultrasonic probe traction member, the ultrasonic probe traction member being sleeved over the puncture rod, the puncture rod being provided with a limiting groove communicating with the instrument channel, the length direction of the limiting groove being consistent with the axial direction of the puncture rod, the inner wall of the ultrasonic probe traction member being fixedly connected to the outer wall of the ultrasonic probe via a connecting member, and the connecting member being slidably disposed within the limiting groove;

[0014] A telescopic control driving member drives the ultrasonic probe traction member to move along the length direction of the limiting groove.

[0015] In one embodiment of the present invention, the telescopic control driving member includes a return spring, a rotating wheel, a top wheel and a limiting sleeve arranged in the inner shell of the telescopic part;

[0016] The rotating wheel is slidably sleeved outside the puncture rod, the limiting sleeve is fixed in the inner shell of the telescopic part and the limiting sleeve is coaxially sleeved outside the puncture rod, one end of the return spring abuts against the rotating wheel, and the other end of the return spring abuts against the inner wall of the inner shell of the telescopic part;

[0017] The end of the rotating wheel facing the limiting sleeve is provided with a first locking member and a second locking member along its axial direction, and the end of the limiting sleeve facing the rotating wheel is provided with a third locking member adapted to both the first locking member and the second locking member.

[0018] The top wheel is coaxially slidably sleeved outside the limiting sleeve, and the top wheel is in contact with the rotating wheel. When an external force drives the top wheel to slide along the central axis of the limiting sleeve, the top wheel drives the rotating wheel to slide along the central axis of the limiting sleeve, so that the first locking member and the third locking member are locked or the second locking member and the third locking member are locked.

[0019] In one embodiment of the present invention, the first locking member is a plurality of oblique openings formed on an end surface of the rotating wheel facing the limiting sleeve, and the plurality of oblique openings are distributed in a ring shape along the central axis of the rotating wheel;

[0020] The second locking member includes a plurality of annularly distributed top posts formed on an end surface of the rotating wheel facing the limiting sleeve, the plurality of top posts surrounding the plurality of oblique openings, and the ends of the top posts facing the limiting sleeve having an oblique surface; the third locking member includes a plurality of oblique grooves formed on the end of the limiting sleeve facing the rotating wheel; the oblique openings, the top posts, and the oblique grooves are provided in equal numbers;

[0021] The top wheel is provided with a plurality of top surfaces distributed in an annular shape on one end thereof facing the rotating wheel;

[0022] The top surface contacts the inclined surface, and when an external force drives the top wheel to slide along the central axis of the limiting sleeve, the top wheel drives the rotating wheel to slide along the central axis of the limiting sleeve, so that the inclined mouth is clamped in the inclined groove to form a lock or the inclined surface is clamped in the inclined groove to form a lock.

[0023] In one embodiment of the present invention, a plurality of open sliding grooves are formed on one end of the limiting sleeve facing the rotating wheel, and the extending direction of the open sliding grooves is consistent with the axial direction of the limiting sleeve;

[0024] The top surface contacts the inclined surface, and when an external force drives the top wheel to slide along the central axis of the limiting sleeve, the top wheel drives the top column to slide into or out of the open sliding groove.

[0025] In one embodiment of the present invention, a guide protrusion is provided in the top wheel, and the guide protrusion is slidably disposed in the open sliding groove.

[0026] In one embodiment of the present invention, a plurality of buckles are provided along the circumference of one end of the rotating wheel facing the ultrasonic probe pulling member, and the ultrasonic probe pulling member is clamped between the plurality of buckles.

[0027] In one embodiment of the present invention, a pushing member is provided on the top wheel.

[0028] In one embodiment of the present invention, the telescopic control unit further includes a telescopic unit housing, the telescopic unit housing being coaxially sleeved on the outside of the telescopic unit inner housing, and the return spring, the rotating wheel, the top wheel, the limiting sleeve, and the ultrasound probe traction member are all disposed within the telescopic unit inner housing;

[0029] The telescopic portion shell is further provided with a push-pull groove extending along its axial direction. One end of the pushing member is fixed to the outside of the top wheel, and the other end of the pushing member passes through the push-pull groove and is located outside the telescopic portion shell.

[0030] In one embodiment of the present invention, a telescopic housing cover is threadedly mounted on the proximal end of the telescopic housing, and the telescopic housing cover is provided with an insert extending axially along the telescopic housing;

[0031] The telescopic control part also includes a fastening nut, which includes a first internal thread and a first external thread. The fastening nut is coaxially sleeved on the outside of the puncture needle rod, and the fastening nut is located between the puncture needle rod and the limiting sleeve; the inner wall of the limiting sleeve is provided with a second internal thread adapted to the first external thread, and the outside of the puncture needle rod is provided with a second external thread adapted to the first internal thread; the fastening nut is provided with an opening for inserting the insertion rod on the end surface facing the telescopic part shell.

[0032] In one embodiment of the present invention, the adjustable bending sheath tube body includes a tube body and a tube blade provided at the distal end of the tube body, and the distal end surface of the tube blade has a cutting edge.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] 1. The percutaneous tunnel-type flexible ultrasonic pulmonary endoscope provided by the present invention integrates the functions of puncture, ultrasound guidance, and adjustable bending. It can accurately puncture the lesion with the needle under the real-time and precise guidance of ultrasound, thereby improving the diagnosis rate of lung nodules, minimizing the number of punctures (complications) and reducing the radiation dose. It overcomes the shortcomings of bronchoscopes that are unable or difficult to reach peripheral and extratracheal lesions, expensive supporting equipment, and high technical barriers, and makes up for the inherent defects of percutaneous lung puncture, such as the inability to eliminate respiratory activity, the inability to adjust the direction in real time, the large puncture damage, and the high radiation dose.

[0035] 2. During use of the percutaneous tunnel-type flexible ultrasonic pulmonary endoscope provided by the present invention, after the distal end of the puncture needle reaches the lesion location, the instrument channel is also used for other diagnostic and treatment instruments (such as ablation needles, biopsy needles, etc.) to directly reach the lesion location for diagnosis and treatment, thereby improving treatment efficiency.

[0036] 3. In the percutaneous tunnel-type flexible ultrasonic pulmonary endoscope provided by the present invention, after the distal end of the puncture needle punctures into the lesion tissue, the distal end of the adjustable bend sheath body remains outside the lesion tissue, which can avoid the needle tract implantation of tumor cells remaining on the adjustable bend sheath body when the adjustable bend sheath body is withdrawn after the operation.

[0037] 4. In the percutaneous tunnel-type flexible ultrasonic pulmonary endoscope provided by the present invention, the adjustable sheath tube body includes a tube body and a tube blade arranged at the distal end of the tube body. The distal end face of the tube blade has a cutting edge. During the puncture process, the distal end of the adjustable sheath tube body (the cutting edge of the tube blade) is punctured together with the puncture needle, which can reduce the overall puncture force of the pulmonary endoscope during the puncture process and make the puncture process smoother.

[0038] 5. In the percutaneous tunnel-type flexible ultrasonic pulmonary endoscope provided by the present invention, the ultrasonic probe can be extended or retracted into the instrument channel, thereby expanding the clinical application range of the pulmonary endoscope. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Other features, objects and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0040] FIG1 is a schematic diagram of the external structure of a percutaneous tunnel-type flexible ultrasonic pulmonary endoscope provided by the present invention;

[0041] FIG2 is a schematic diagram of the explosion structure of the ultrasonic puncture assembly of the present invention;

[0042] FIG3 is a schematic diagram of the appearance structure of the telescopic control drive member assembled outside the puncture needle;

[0043] FIG4 is an axial cross-sectional view of FIG3;

[0044] FIG5 is a partial cross-sectional view of the telescopic control portion when the ultrasound probe is located in the instrument channel;

[0045] FIG6 is a partial cross-sectional view of the telescopic control portion when the ultrasound probe is extended into the instrument channel;

[0046] FIG7 is a schematic diagram of the appearance structure of the telescopic control unit;

[0047] FIG8 is a diagram showing the state of the telescopic control portion when the ultrasound probe is extended out of the instrument channel and the push piece is pushed toward the distal end of the puncture needle;

[0048] FIG9 is a diagram showing the telescopic control portion in a state where the ultrasonic probe is extended out of the instrument channel and the rotary wheel push column is pushed out of the open slot of the limiting sleeve;

[0049] FIG10 is a diagram showing the telescopic control portion when the ultrasonic probe is extended out of the instrument channel and the front inclined surface of the rotating wheel top is stuck in the inclined groove of the limiting sleeve;

[0050] FIG11 is a diagram showing the state of the telescopic control portion when the ultrasonic probe is retracted into the instrument channel and the push piece is pushed toward the distal end of the puncture needle;

[0051] FIG12 is a diagram showing the telescopic control portion in a state where the ultrasonic probe is retracted into the instrument channel and the rotary wheel push column is pushed out of the inclined slot of the limiting sleeve;

[0052] FIG13 is a diagram showing the telescopic control portion when the ultrasonic probe is retracted into the instrument channel and the top column of the rotating wheel slides into the open sliding groove until the oblique opening of the rotating wheel is engaged with the oblique groove of the limiting sleeve;

[0053] Figure 14 is a schematic diagram of the structure of the fastening nut and the telescopic housing cover;

[0054] Figure 15 is a schematic diagram of the locking member structure;

[0055] The correspondence between each mark and component name is as follows: ultrasonic puncture assembly 1, puncture needle 101, puncture needle sealing ring 1011, anti-drop sleeve 1012, ultrasonic probe 102, telescopic control part 103, locking ring 1031, extrusion plate 10311, extrusion clamping ring 10312, telescopic part outer shell 1032, telescopic part outer shell cover 10321, telescopic part inner shell 1033, telescopic part inner shell cover 10331, puncture push block 10332, return spring 1034, ultrasonic probe traction part 1035, rotating wheel 1036, top wheel 1037, push piece 10371, limiting sleeve 1038, fastening nut 1039, equipment connection end 104, adjustable bending sheath body 2, operating handle 3, channel entrance unit 4, bending adjustment operating part 6. DETAILED DESCRIPTION

[0056] The present invention will be described in detail below with reference to specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those skilled in the art, several changes and improvements can be made without departing from the scope of the present invention. These all fall within the scope of protection of the present invention.

[0057] In the description of the present invention, it should be understood that the terms "one end", "the other end", "outside", "upper", "inside", "horizontal", "coaxial", "center", "end", "length", "outer end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the present invention.

[0058] In addition, in the description of the present invention, “a plurality of” means at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0059] In the field of medical devices, the end closest to the operator during operation is generally referred to as the "proximal end or tail end," and the end farther from the operator during operation is referred to as the "distal end or head end." This principle is used to define the "proximal end" and "distal end" of any component of the percutaneous, flexible, tunneled ultrasound pneumonoscope in the present invention. "Axial" generally refers to the length of the tube or sheath during delivery, and "radial" generally refers to the direction perpendicular to the "axial" direction of the tube or sheath, or to the direction perpendicular to the line connecting the distal and proximal centers of the medical device. This principle is used to define the "axial" and "radial" of any component of the percutaneous, flexible, tunneled ultrasound pneumonoscope in the present invention.

[0060] Example

[0061] 1 , this embodiment provides a percutaneous tunnel-type flexible ultrasonic pulmonary endoscope, comprising an adjustable sheath assembly and an ultrasonic puncture assembly.

[0062] Among them, the adjustable bending sheath tube assembly includes an adjustable bending sheath tube body and a traction piece; the adjustable bending sheath tube body includes a bending adjustment section, the traction piece is connected to the bending adjustment section, and the traction piece pulls the bending adjustment section to drive the bending adjustment section to bend.

[0063] Wherein, as shown in FIG2 , the ultrasonic puncture assembly includes:

[0064] The puncture rod, the adjustable bending sheath body is coaxially sleeved outside the puncture rod, and the puncture rod has an instrument channel;

[0065] A petal-shaped puncture head is provided at the distal end of the puncture rod and is composed of a plurality of elastic conical petals. The petal-shaped puncture head has an open state and a closed state. In the closed state, the petal-shaped puncture head has a conical structure (as shown in FIG5 ). In the open state, the petal-shaped puncture head has a hollow cylindrical structure with a plurality of conical notches at the distal end (as shown in FIG6 ).

[0066] Ultrasonic probe, which is placed in the instrument channel;

[0067] The telescopic control part is detachably mounted on the proximal end of the puncture rod, and drives the ultrasonic probe to move forward and backward along the axis of the instrument channel; when the petal-shaped puncture head is in the open state, the telescopic control part drives the ultrasonic probe to pass through the petal-shaped puncture head (as shown in Figure 6).

[0068] In one embodiment, the elastic conical petal is a metal sheet structure and is elastic;

[0069] 5 and 6 , when the percutaneous tunnel-type flexible ultrasonic pulmonary endoscope in this embodiment is in use, the telescopic control unit drives the ultrasonic probe 102 to move in the instrument channel along the proximal to distal direction of the instrument channel until the multiple elastic conical petals are stretched open by the ultrasonic probe 102, and the petal-shaped puncture head is in an open state. The ultrasonic probe passes through the petal-shaped puncture head. When the ultrasonic probe 102 needs to be retracted into the instrument channel, the telescopic control unit drives the ultrasonic probe 102 to move along the distal to proximal direction of the instrument channel until the ultrasonic probe 102 enters the instrument channel. At this time, the multiple elastic conical petals return to their original state due to elastic force, and at this time, the petal-shaped puncture head is in a closed state.

[0070] In one embodiment, the telescopic control part is detachably mounted on the proximal end of the puncture rod. After the petal-shaped puncture head punctures the interior of the lesion tissue, the telescopic control part is removed from the puncture rod and the ultrasound probe 102 is removed from the instrument channel, so that other diagnostic and treatment instruments can directly reach the lesion location through the instrument channel.

[0071] 2 to 7 , the telescopic control unit includes:

[0072] The telescopic portion inner shell 1033 is coaxially sleeved on the outside of the puncture rod;

[0073] The ultrasonic probe traction member 1035 is disposed within the telescopic portion inner shell 1033. A limiting slot is defined on the puncture rod, the length of which is consistent with the length of the puncture rod. The ultrasonic probe traction member 1035 partially passes through the limiting slot and is positioned within the instrument channel. The portion of the ultrasonic probe traction member 1035 located within the instrument channel is connected to the ultrasonic probe 102.

[0074] The ultrasonic probe pulling member 1035 is sleeved on the outside of the puncture rod 101. The puncture rod 101 is provided with a limiting groove connected to the instrument channel. The length direction of the limiting groove is consistent with the axial direction of the puncture rod, and the proximal end of the limiting groove extends to the proximal end surface of the puncture rod. That is, the ultrasonic probe pulling member 1035 can slide along the limiting groove toward the proximal end of the puncture rod until it slides out of the limiting groove. At this time, the ultrasonic probe pulling member 1035 slides out of the proximal end of the puncture rod 101, and the ultrasonic probe pulling member 1035 is separated from the puncture rod 101. The ultrasonic probe in this embodiment includes a guide portion and a probe portion provided at the head end of the guide portion, wherein the connecting member includes a connecting protrusion provided on the inner wall of the ultrasonic probe pulling member, and the side of the connecting protrusion facing away from the inner wall of the ultrasonic probe pulling member 1035 passes through the limiting groove and is connected to the outer wall of the guide portion.

[0075] The telescopic control driving member drives the ultrasonic probe traction member 1035 to move along the length direction of the limiting groove, wherein the length direction of the limiting groove is consistent with the axial direction of the puncture rod, limiting the ultrasonic probe traction member 1035 to only slide back and forth along the axial direction of the puncture rod 101.

[0076] Specifically, as shown in Figures 2 to 7, the telescopic control drive member includes a return spring 1034, a rotating wheel 1036, a top wheel 1037 and a limiting sleeve 1038 provided in the inner shell of the telescopic portion;

[0077] The rotating wheel 1036 is slidably mounted on the outside of the puncture rod, the limiting sleeve 1038 is fixed in the telescopic portion inner shell 1033 and the limiting sleeve 1038 is coaxially mounted on the outside of the puncture rod, one end of the return spring 1037 abuts against the rotating wheel 1036, and the other end of the return spring 1034 abuts against the inner wall of the telescopic portion inner shell 1033; one end of the return spring 1034 is tightly attached to the telescopic portion inner shell 1033, and the other end is tightly attached to the rotating wheel 1036, providing a backward thrust for the rotating wheel 1036;

[0078] The end of the rotating wheel 1036 facing the limiting sleeve 1038 is provided with a first locking member and a second locking member along its axial direction. The end of the limiting sleeve 1038 facing the rotating wheel is provided with a third locking member that is compatible with both the first locking member and the second locking member.

[0079] The top wheel 1037 is coaxially slidably sleeved outside the limiting sleeve 1038, and the top wheel 1037 is in contact with the rotating wheel 1036. When an external force drives the top wheel 1037 to slide along the central axis of the limiting sleeve 1038, the top wheel 1037 drives the rotating wheel 1036 to slide along the central axis of the limiting sleeve 1038, so that a lock is formed between the first locking member and the third locking member or a lock is formed between the second locking member and the third locking member.

[0080] Furthermore, the first locking member is a plurality of oblique openings 10361 formed on one end of the rotating wheel 1036 facing the limiting sleeve 1038 , and the plurality of oblique openings 10361 are distributed in a ring shape along the central axis of the rotating wheel 1036 ;

[0081] The second locking member includes a plurality of annularly distributed top posts 10362 disposed on the end surface of the rotating wheel 1036 facing the limiting sleeve 1038. The top posts 10362 surround a plurality of oblique openings 10361, and the ends of the top posts 10362 facing the limiting sleeve 1038 have an oblique surface. The third locking member includes a plurality of oblique slots 10381 formed on the end surface of the limiting sleeve 1038 facing the rotating wheel 1036. The oblique openings 10361, top posts 10362, and oblique slots 10381 are provided in equal numbers.

[0082] The top wheel 1037 contacts the inclined surface of one end of the top column 10362 toward the limiting sleeve 1038. When external force drives the top wheel 1037 to slide along the central axis of the limiting sleeve 1038, the top wheel 1037 drives the rotating wheel 1036 to slide along the central axis of the limiting sleeve 1038, so that the inclined mouth 10361 is stuck in the inclined groove 10381 to form a lock or the inclined surface of one end of the top column 10362 toward the limiting sleeve is stuck in the inclined groove 10381 to form a lock.

[0083] A plurality of open sliding grooves 10382 are formed on one end of the limiting sleeve 1038 facing the rotating wheel 1036 . The extending direction of the open sliding grooves 10382 is consistent with the axial direction of the limiting sleeve 1038 .

[0084] The top wheel 1037 contacts the inclined surface of the top column 10362 toward one end of the limiting sleeve 1038. When an external force drives the top wheel 1037 to slide along the central axis of the limiting sleeve 1038, the top wheel 1037 drives the top column 10362 to slide into or out of the open sliding groove 10382.

[0085] Furthermore, a guide protrusion is provided in the top wheel 1037, and the guide protrusion is slidably arranged in the open slide groove 10382. Through the cooperation between the guide protrusion and the open slide groove 10382, the movement direction of the top wheel 1037 is restricted, so that the top wheel 1037 always moves axially along the limit sleeve 1038 under the action of external force.

[0086] The ultrasound probe puller 1035 is mounted on the ultrasound probe 102, securing the ultrasound probe 102 to each other. As shown in FIG7 , a rotating wheel 1036 is provided with multiple buckles along its circumference at one end thereof. The ultrasound probe puller 1035 is positioned between the buckles, securing the ultrasound probe puller 1035 to the rotating wheel 1036. The ultrasound probe puller 1035 slides back and forth with the rotating wheel 1036. This sliding movement of the ultrasound probe puller 1035 causes the ultrasound probe 102 to extend and retract along the axis of the instrument channel. The proximal end of the ultrasound probe 102 is connected to an image display device via the device connection port 104. The imaging device processes the image information captured by the ultrasound probe 102 and intuitively presents the processed ultrasound image information to medical personnel via a display.

[0087] A pushing member is provided on the top wheel 1037 , and external force applies power to the top wheel 1037 through the pushing member to make it move axially along the limiting sleeve 1038 , thereby improving operational convenience.

[0088] 5 and 6 , the telescopic control part in this embodiment further includes a telescopic part outer shell 1032 , which is coaxially sleeved on the outside of the telescopic part inner shell 1033 , and the return spring 1034 , the rotating wheel 1036 , the top wheel 1037 , the limiting sleeve 1038 and the ultrasonic probe traction part 1035 are all arranged inside the telescopic part inner shell 1033 .

[0089] The telescopic portion shell 1032 is also provided with a push-pull groove extending along its axial direction. One end of the push member is fixed to the outer wall of the top wheel 1037, and the other end of the push member passes through the push-pull groove and is located outside the telescopic portion shell 1032. The length direction of the push-pull groove is consistent with the axial direction of the limit sleeve 1038 and the axial direction of the puncture rod.

[0090] 5 and 6 , the telescopic control part in this embodiment further includes a telescopic part outer shell cover 10321 and a telescopic part inner shell cover 10331. The telescopic part inner shell cover 10331 is threadedly mounted on the proximal end of the telescopic part inner shell 1033. The proximal end of the telescopic part outer shell 1032 is threadedly mounted with the telescopic part outer shell cover 10321. The telescopic part outer shell cover 10321 is coaxially sleeved on the outside of the telescopic part inner shell cover 10331.

[0091] As shown in Figures 5-7, a fastening nut is coaxially provided inside the tail end of the limiting sleeve 1038, and the fastening nut 1039 includes a first internal thread and a first external thread. The fastening nut 1039 is coaxially sleeved on the outside of the puncture needle rod, and the fastening nut 1039 is located between the puncture needle rod and the limiting sleeve 1038. The inner wall of the limiting sleeve 1038 is provided with a second internal thread that is compatible with the first external thread, and the outside of the puncture needle rod is provided with a second external thread that is compatible with the first internal thread.

[0092] 14 , the telescopic housing cover 10321 is provided with an insert extending axially along the telescopic housing 10321 ; and the fastening nut 1039 is provided with an opening on the end surface facing the telescopic housing 10321 for inserting the insert.

[0093] Furthermore, a sealing ring groove is provided on the outside of the puncture needle rod in this embodiment at a position corresponding to the distal end surface of the inner shell 1033 of the telescopic part, and a puncture needle sealing ring 1011 is provided in the sealing ring groove. The removal sleeve 1012 is placed on the puncture needle sealing ring 1011 to prevent the puncture needle sealing ring 1011 from falling off.

[0094] The pushing member includes a pushing piece 10371 and a connecting part. The pushing piece 10371 is located outside the telescopic part shell 1032. One end of the connecting part is connected to the pushing piece 10371, and the other end of the connecting part is tightly matched with the external boss of the top wheel 1037. Pushing the pushing piece 10371 back and forth along the push-pull groove can drive the top wheel 1037 to slide back and forth along the axial direction of the limiting sleeve 1038; the top wheel 1037 is outerly mounted on the limiting sleeve 1038, and the guide protrusion on the inner side of the top wheel 1037 is embedded in the open sliding groove 10382 on the limiting sleeve 1038, which limits the top wheel 1037 to only slide axially along the puncture rod 101, and also ensures that the top wheel 1037 can slide smoothly, as shown in Figure 7.

[0095] Pushing the push piece 10371 forward drives the top wheel 1037 to slide forward, and the top surface 10372 will be in close contact with the inclined surface at the top of the top column 10362, and push the rotating wheel 1036 to slide forward (at this time, because the top column 10362 is embedded in the axial open sliding groove 10382 on the limiting sleeve 1038, the rotating wheel 1036 can only slide axially). Continue to push the push piece 10371 forward (the top wheel 1037 pushes the rotating wheel 1036 to slide forward) until the top column 10362 slides out of the open sliding groove 10382 (at this time, the top column 10362 is not restricted by the axial open sliding groove 10382 on the limiting sleeve 1038, so the rotating wheel 1036 can both slide forward and backward along the axial direction and rotate around its own axis). , stop pushing the push piece 1037 forward, because the return spring 1034 applies a backward thrust to the rotating wheel 1036, the inclined surface of the end of the top column 10362 toward the limiting sleeve 1038 will slide along the inclined surface of the top surface 10372 and the inclined surface of the inclined groove 10381 at the front end of the limiting sleeve 1038, so that the rotating wheel 1036 rotates around its own axis (due to the inclined surface restrictions of the top surface 10372 and the inclined groove 10381, the rotating wheel 1036 can only rotate around its own axis in one direction) while sliding backward, and finally the front end of the top column 10362 is stuck in the inclined groove 10381. At this time, the ultrasonic probe 102 extends from the inner cavity of the ultrasonic puncture unit 1 and cannot slide backward, as shown in Figures 8-10.

[0096] Push the push piece 10371 forward again to drive the top wheel 1037 to slide forward, and the top surface 10372 is pressed against the inclined surface of the top column 10362 toward one end of the limiting sleeve 1038, pushing the rotating wheel 1036 to slide forward (at this time, due to the restriction of the inclined groove 10381, the top wheel 1037 can only slide axially), so that it exits the inclined groove 10381. After the restriction of the inclined groove 10381 is released, due to the backward thrust applied by the return spring 1034, the inclined surface of the top column 10362 toward one end of the limiting sleeve 1038 slides along the top surface 10372 and the inclined groove 10381 at the front end of the limiting sleeve 1038. The rotating wheel 1036 is driven to rotate around its own axis (due to the inclined surface restriction of the top surface 10372 and the inclined groove 10381, the rotating wheel 1036 can only rotate around its own axis in one direction) and slide backward. When the top column 10362 slides into the open groove 10382, the rotating wheel 1036 stops rotating due to the restriction of the open groove 10382 and can only slide backward along the open groove 10382 until the inclined opening 10361 is tightly fitted with the inclined groove 10381. At this time, the ultrasonic probe 102 is retracted into the inner cavity of the ultrasonic puncture unit 1 and cannot slide backward, as shown in Figures 11-13.

[0097] The insert strip on the telescopic shell cover 10321 is inserted into the slot of the fastening nut 1039 , and the fastening nut 1039 can be tightened or unscrewed by rotating the telescopic shell cover 10321 clockwise or counterclockwise around the axis of the telescopic shell cover 10321 .

[0098] Rotate the telescopic outer shell cover 10321 clockwise (facing the distal end of the pulmonary endoscope) to drive the fastening nut 1039 to screw into the limiting sleeve 1038, so that the external thread and internal thread of the fastening nut 1039 are respectively engaged with the internal thread in the limiting sleeve 1038 and the external thread of the tail section of the puncture rod 101 and tightened, so that the re-puncture part (including: puncture needle 101, puncture needle sealing ring 1011, anti-drop sleeve 1012, ultrasonic probe 102, telescopic inner shell 1033, telescopic inner shell cover 10331, puncture push block 10332, reset spring 1034, ultrasonic probe traction part 1035, rotating wheel 1036, top wheel 1037, push piece 10371, limiting sleeve 1038, fastening nut 1039) becomes an interconnected whole.

[0099] Furthermore, the percutaneous tunnel-type flexible ultrasonic pulmonary endoscope in this embodiment also includes a puncture push block 10332. As shown in Figures 5-7, the puncture push block 10332 includes a force-applying part and a connecting part. A guide groove extending along its axial direction is provided on the telescopic part shell 1032. The force-applying part is located outside the telescopic part shell 1032, and one end of the connecting part is connected to the force-applying part. The other end of the connecting part passes through the guide groove and is connected to the external groove of the telescopic part inner shell 1033. Pushing the puncture push block 10332 forward can make the re-puncture part slide forward inside the telescopic part shell 1032 and the telescopic part shell cover 10321 until the puncture needle punctures the inside of the lesion, leaving the distal end of the adjustable curved sheath tube body 2 outside the lesion tissue, so as to realize the separation of the distal end of the adjustable curved sheath tube body 2 and the distal end of the puncture needle during diagnosis and treatment, thereby avoiding tumor cells remaining on the adjustable curved sheath tube body 2, which may cause needle tract implantation when the pulmonary endoscope is withdrawn after the operation is completed.

[0100] 15, a locking ring 1031 is threadedly connected to the distal end of the telescopic housing 1032, and an extrusion clamping ring 10312 is provided inside the distal end of the telescopic housing 1032 and between the puncture rod 101 and the telescopic housing 1032. The inner wall of the extrusion clamping ring 10312 contacts the outer wall of the puncture rod 101, and the outer wall of the extrusion clamping ring 10312 contacts the inner wall of the telescopic housing 1032. A squeezing plate 10311 is provided on the side of the locking ring 10312 facing the squeezing clamping ring 10312. A boss is also provided in the telescopic housing 1032. The boss is located on the side of the squeezing clamping ring 10312 away from the locking ring 1031. Both sides of the squeezing clamping ring 10312 in the axial direction are in contact with the squeezing plate 10311 and the boss respectively. After completing the re-puncture, the locking ring 1031 is rotated clockwise (facing the distal end of the pulmonary endoscope) to increase the pressure of the squeezing plate 10311 on the soft squeezing clamping ring 1031 2, the extrusion of the clamping ring 10312 is deformed and the inner diameter is reduced, thereby clamping the puncture needle, locking the re-puncture part so that it is relatively fixed with the telescopic shell 1032; the telescopic shell cover 10321 is rotated counterclockwise (facing the distal end of the pulmonary endoscope), driving the fastening nut 1039 to be unscrewed from the limiting sleeve 1038, so that the external thread and internal thread of the fastening nut 1039 are respectively disengaged from the internal thread in the limiting sleeve 1038 and the external thread of the tail section of the puncture needle 101. After removing the fastening nut 1039, the re-puncture part (except the puncture needle, puncture needle sealing ring 1011, and anti-detachment sleeve 1012) can be taken out from the telescopic shell 1032, so that the instrument channel in the puncture needle is empty, and then the telescopic shell cover 10321 is covered as a guide channel to guide diagnostic and treatment devices such as ablation needles and biopsy needles into the instrument channel, reach the lesion through the instrument channel and perform diagnosis and treatment.

[0101] In one embodiment, the adjustable bending sheath tube body 2 includes a tube body and a tube blade provided at the distal end of the tube body. The distal end face of the tube blade has a cutting edge. The setting of the cutting edge enables the sheath tube and the puncture needle to be punctured together.

[0102] As shown in Figure 1, the adjustable sheath tube assembly in this embodiment also includes an operating handle 3, which is installed at the proximal end of the tube body. The distal end of the traction member is connected to the bending adjustment section, and the proximal end of the traction member is connected to the operating handle 3. The traction member is pulled by the operating handle 3, and then the traction member pulls the bending adjustment section to drive the bending adjustment section to bend.

[0103] The operating handle 3 in this embodiment includes a handle outer shell and a bending operating part 6 installed on the handle outer shell. The proximal end of the traction part is connected to the bending operating part 6. The handle outer shell includes a head end opening and a tail end opening that are relatively arranged. The proximal end of the tube body is sealed and fixedly installed in the head end opening, and a channel entrance unit 4 is installed at the tail end opening. In this embodiment, the locking ring 1031 is rotatably installed on the channel entrance unit 4. The distal end of the puncture needle 101 enters the handle shell through the channel entrance unit 4 and then enters the adjustable bending sheath tube body 2 through the head end opening, and extends out of the adjustable bending sheath tube body 2 from the distal end of the tube blade.

[0104] In the percutaneous tunnel-type flexible ultrasonic pulmonary endoscope in this embodiment, the instrument channel in the puncture needle can be used for the ultrasonic probe 102 to pass through and extend from the distal end of the adjustable curved sheath body 2 to perform ultrasonic real-time navigation and monitoring (monitoring the real-time status of ablation during the operation), and can also be used for diagnostic and treatment instruments to pass through to reach the lesion.

[0105] The puncture needle 101 enters the adjustable sheath body 2 through the tail opening and the head opening in sequence. The petal-shaped puncture head of the puncture needle 101 extends from the distal end of the adjustable sheath body 2, and the telescopic control part 103 is connected and locked with the channel entrance unit 4. When it is necessary to puncture harder tissue (such as skin, muscle, chest wall, etc.), the ultrasonic probe 102 can be retracted into the instrument channel, and puncture is performed through the petal-shaped puncture head or the blade of the puncture needle; when puncturing softer tissue in the lungs and the location of the lesion is more complex, with large blood vessels or important organs around it, and the puncture path needs to be turned to reach the lesion location, the ultrasonic probe 102 can be extended from the inner cavity of the instrument channel to detect the exact location of the large blood vessels and important organs in the puncture path, lock the exact location of the lesion, and achieve precise navigation of the puncture path. The operator uses the image information provided by the ultrasonic probe 102 to bend the adjustable sheath, change the puncture direction, avoid large blood vessels and important organs, and accurately puncture to the vicinity of the lesion (1 cm away from the lesion). After the distal end of the puncture needle 101 is facing the center of the lesion tissue, the adjustable sheath body 2 is fixed, the ultrasonic probe 102 is retracted into the instrument channel, and the puncture part (including: puncture needle 101, puncture needle sealing ring 1011, anti-drop sleeve 1012, ultrasonic probe 102, telescopic part inner shell 1033, telescopic part inner shell cover 10331, puncture push block 10332, reset spring 1034, ultrasonic probe traction part 1035, rotating wheel 1036, top wheel 1037, push The adjustable sheath body 2 is left outside the lesion tissue (to avoid needle tract implantation of tumor cells remaining on the sheath when the adjustable sheath is removed after the operation). The locking ring 1031 is then tightened to allow the squeezing clamping ring 10312 to clamp the puncture needle 101. The fastening nut 1039 is finally removed to remove the re-puncture part (except the puncture needle 101, the puncture needle sealing ring 1011, and the anti-detachment sleeve 1012) from the telescopic housing 1032 (the ultrasonic probe 102 is removed from the inner cavity of the puncture needle 101), leaving a cavity path for other diagnostic and treatment instruments to directly reach the lesion location through the cavity.

[0106] The above describes specific embodiments of the present invention. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art may make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. The embodiments of this application and the features in the embodiments may be combined with each other in any manner unless there is a conflict.

Claims

1. A percutaneous tunnel-type flexible ultrasonic pulmonary endoscope, characterized in that: It includes an adjustable curved sheath tube component and an ultrasonic puncture component; The adjustable bending sheath tube assembly comprises an adjustable bending sheath tube body and a traction member; the adjustable bending sheath tube body comprises a bending adjustment section, the traction member is connected to the bending adjustment section, and the traction member pulls the bending adjustment section to drive the bending adjustment section to bend; The ultrasonic puncture assembly comprises: The puncture rod, the adjustable bending sheath tube body is coaxially sleeved outside the puncture rod, and the puncture rod has an instrument channel; A petal-shaped puncture head, which is arranged at the distal end of the puncture rod and is composed of a plurality of elastic conical petals; the petal-shaped puncture head has an open state and a closed state. In the closed state, the petal-shaped puncture head is a cone-shaped structure, and in the open state, the petal-shaped puncture head is a hollow cylindrical structure with a plurality of conical notches at the distal end; an ultrasonic probe, wherein the ultrasonic probe is disposed in the instrument channel; A telescopic control part, wherein the telescopic control part is detachably mounted on the proximal end of the puncture rod, and the telescopic control part drives the ultrasonic probe to move in the instrument channel; when the petal-shaped puncture head is in an open state, the telescopic control part drives the ultrasonic probe to pass through the petal-shaped puncture head.

2. The percutaneous tunnel-type flexible ultrasonic pulmonary endoscope according to claim 1, characterized in that: The telescopic control unit comprises: An inner shell of the telescopic part, wherein the inner shell of the telescopic part is coaxially sleeved outside the puncture rod; An ultrasonic probe traction member, the ultrasonic probe traction member is sleeved outside the puncture rod, a limiting groove connected to the instrument channel is provided on the puncture rod, the length direction of the limiting groove is consistent with the axial direction of the puncture rod, the inner wall of the ultrasonic probe traction member is fixedly connected to the outer wall of the ultrasonic probe through a connecting member, and the connecting member is slidably arranged in the limiting groove; A telescopic control driving member drives the ultrasonic probe traction member to move along the length direction of the limiting groove.

3. The percutaneous tunnel-type flexible ultrasonic pulmonary endoscope according to claim 2, characterized in that: The telescopic control driving member comprises a return spring, a rotating wheel, a top wheel and a limit sleeve arranged in the inner shell of the telescopic part; The rotating wheel is slidably sleeved outside the puncture rod, the limiting sleeve is fixed inside the inner shell of the telescopic part and the limiting sleeve is coaxially sleeved outside the puncture rod, one end of the reset spring abuts against the rotating wheel, and the other end of the reset spring abuts against the inner wall of the inner shell of the telescopic part; The end of the rotating wheel facing the limiting sleeve is provided with a first locking member and a second locking member along its axial direction, and the end of the limiting sleeve facing the rotating wheel is provided with a third locking member adapted to both the first locking member and the second locking member. The top wheel coaxial sliding sleeve is arranged outside the limiting sleeve, and the top wheel is in contact with the rotating wheel. When an external force drives the top wheel to slide along the central axis of the limiting sleeve, the top wheel drives the rotating wheel to slide along the central axis of the limiting sleeve, so that the first locking member and the third locking member are locked or the second locking member and the third locking member are locked.

4. The percutaneous tunnel-type flexible ultrasonic pulmonary endoscope according to claim 3, characterized in that: The first locking member is a plurality of oblique openings formed on an end surface of the rotating wheel facing the limiting sleeve, and the plurality of oblique openings are distributed in a ring shape along the central axis of the rotating wheel; The second locking member includes a plurality of top posts distributed in an annular shape and formed on the end surface of one end of the rotating wheel facing the limiting sleeve, the plurality of top posts surround the plurality of oblique openings, and the end of the top post facing the limiting sleeve has an inclined surface; the third locking member includes a plurality of oblique grooves formed on the end of the limiting sleeve facing the rotating wheel; the oblique openings, the top posts and the oblique grooves are provided in equal numbers; A plurality of top surfaces distributed in an annular shape are formed on one end of the top wheel facing the rotating wheel; The top surface contacts the inclined surface, and when an external force drives the top wheel to slide along the central axis of the limiting sleeve, the top wheel drives the rotating wheel to slide along the central axis of the limiting sleeve, so that the inclined mouth is clamped in the inclined groove to form a lock or the inclined surface is clamped in the inclined groove to form a lock.

5. The percutaneous tunnel-type flexible ultrasonic pulmonary endoscope according to claim 4, characterized in that: A plurality of open sliding grooves are provided on one end of the limiting sleeve facing the rotating wheel, and the extending direction of the open sliding grooves is consistent with the axial direction of the limiting sleeve; The top surface contacts the inclined surface, and when an external force drives the top wheel to slide along the central axis of the limiting sleeve, the top wheel drives the top column to slide into or out of the open sliding groove.

6. The percutaneous tunnel-type flexible ultrasonic pulmonary endoscope according to claim 5, characterized in that: A guide protrusion is arranged in the top wheel, and the guide protrusion is slidably arranged in the open sliding groove.

7. The percutaneous tunnel-type flexible ultrasonic pulmonary endoscope according to claim 3, characterized in that: One end of the rotating wheel facing the ultrasonic probe traction member is provided with a plurality of buckles along its circumference, and the ultrasonic probe traction member is clamped between the plurality of buckles.

8. The percutaneous tunnel-type flexible ultrasonic pulmonary endoscope according to claim 3, characterized in that: The top wheel is provided with a pushing member.

9. The percutaneous tunnel-type flexible ultrasonic lung endoscope according to claim 8, characterized in that: The telescopic control part further comprises a telescopic part outer shell, the telescopic part outer shell is coaxially sleeved outside the telescopic part inner shell, and the reset spring, the rotating wheel, the top wheel, the limiting sleeve and the ultrasonic probe traction member are all arranged inside the telescopic part inner shell; The telescopic portion shell is also provided with a push-pull groove extending along its axial direction. One end of the pushing member is fixed to the outside of the top wheel, and the other end of the pushing member passes through the push-pull groove and is located outside the telescopic portion shell.

10. The percutaneous tunnel-type flexible ultrasonic pulmonary endoscope according to claim 9, characterized in that: A telescopic housing cover is threadedly mounted on the proximal end of the telescopic housing, and the telescopic housing cover is provided with an insert extending along the axial direction of the telescopic housing; The telescopic control part also includes a fastening nut, which includes a first internal thread and a first external thread. The fastening nut is coaxially sleeved outside the puncture needle rod, and the fastening nut is located between the puncture needle rod and the limiting sleeve; the inner wall of the limiting sleeve is provided with a second internal thread that is compatible with the first external thread, and the outside of the puncture needle rod is provided with a second external thread that is compatible with the first internal thread; the fastening nut is provided with an opening for inserting the insertion strip on the end surface facing the outer shell of the telescopic part.

11. The percutaneous tunnel-type flexible ultrasonic pulmonary endoscope according to claim 1, characterized in that: The adjustable bending sheath tube body comprises a tube body and a tube blade arranged at the distal end of the tube body, and the distal end surface of the tube blade has a cutting edge.

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