Novel needle biopsy needle applied through ultrasonic bronchoscope

Abstract

The invention relates to the technical field of medical instruments, in particular to a novel puncture biopsy needle applied through an ultrasonic bronchoscope, which comprises an ultrasonic bronchoscope body, a shooting part, an excitation part and a biopsy part, the shooting part comprises a shell, a fixing clamp, an inclined convex block, a driving hammer, a thick spring, a firing pin, a delay top ring and a thin spring, the biopsy part comprises an outer sheath, an inner core and a biopsy inner needle. The driving hammer is stimulated to eject the fixing clamp open, so that the firing pin impacts the inner core to drive the biopsy inner needle to enter a septum focus beside a trachea or a bronchus of a patient, and the thin spring delays to drive the delay ejection ring to impact the sheath to cut off the focus, so that the puncture force does not need to be manually controlled or the focus is repeatedly pulled and inserted; the biopsy of the mediastinal focus beside the trachea or the bronchus can be completed by the aid of the biopsy forceps, the positive rate of obtaining effective specimens is increased, the operation difficulty of medical staff is reduced, the biopsy forceps are efficient and rapid, and complications are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, in particular to a novel puncture biopsy needle applied via an ultrasonic bronchoscope. Background Art

[0002] A bronchoscope is a medical device that is placed into the patient's lower respiratory tract through the mouth or nose and is used for observation, biopsy sampling, bacteriological and cytological examination of lobar, segmental and subsegmental bronchial lesions. It can be used for photography, teaching and dynamic recording with a TV system. The connected biopsy sampling accessories can assist in the discovery of early lesions. It is suitable for bronchial and lung disease research and postoperative examinations. Most lung and airway diseases, such as tumors, interstitial lung disease, granulomatous diseases and certain infectious diseases require bronchoscopic biopsy to confirm the diagnosis; the bronchoscope can be equipped with various other accessories such as biopsy needles, biopsy clips, cell brushes, infusion tubes, straws, etc., to cooperate with the completion of biopsy, injection of drugs, suction of sputum and other tasks. Among them, the biopsy needle is a medical device for sampling living tissue and aspirating cells for testing.

[0003] The patent with application number CN220695293U discloses a biopsy needle, including a shell, a needle body and a driving assembly. The shell is provided with a first opening. The needle body is inserted into the shell and extends out from the first opening, and the axial direction of the needle body includes a first direction and a second direction in opposite directions. The driving assembly includes a rack and a pressing member, the pressing member is rotatably connected to the shell, the rack is arranged in the shell and connected to the needle body, the pressing member includes a gear portion arranged in the shell and a pressing portion inserted outside the shell, and the gear portion is meshed with the rack. The rotation direction of the pressing member includes a first circumferential direction and a second circumferential direction in opposite directions, the pressing member is configured to drive the needle body to move in the first direction after obtaining pressure along the first circumferential direction, so as to drive the needle body to pierce the living body and obtain a sample, and the pressing member is also configured to drive the needle body to move in the second direction after obtaining pressure along the second circumferential direction. The biopsy needle provided by the patent adopts a transmission method in which the pressing member cooperates with the rack, simplifies the structure, and is easy to operate.

[0004] The above patent does use a rack transmission mechanism to drive the needle body to move, replacing the existing driving method of directly using a push rod to push the needle body. However, when medical staff hold the bronchoscope with one hand, they need to use appropriate force with the other hand to perform a puncture biopsy, which is often inconvenient for reciprocating operations. The reciprocating insertion and withdrawal of the biopsy needle will also increase the risk of complications for patients, such as pneumothorax, chest pain, drainage and bleeding. Moreover, the above patent only improves the driving method of the puncture needle body, and in terms of the sampling method of the puncture needle body, the negative pressure needle aspiration biopsy method currently widely used in clinical practice still faces problems such as unstable sampling quality and low positive rate of obtaining effective specimens. Summary of the invention

[0005] In order to overcome the defects in the prior art, the purpose of the present invention is to provide a new puncture biopsy needle applied via ultrasonic bronchoscope to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides a novel puncture biopsy needle for use with an ultrasonic bronchoscope, comprising an ultrasonic bronchoscope body, wherein the ultrasonic bronchoscope body comprises a handle, a side passage tube arranged on one side of the handle, and a hose connected to the lower end of the handle, wherein the lower end of the hose is a bendable lens, and the side passage tube is connected to the inside of the handle and forms a puncture channel with the lower end of the hose; It includes a biopsy part arranged in the puncture channel, a shooting part arranged at the side passage and used to control the expansion and contraction of the biopsy part for sampling, and an exciting part arranged below the middle of the shooting part and used to trigger the shooting part, and the lower end of the shooting part is sleeve-connected with the upper end of the biopsy part; The shooting part includes a cylindrical shell, two wing shells arranged on both sides of the middle part of the shell, a fixing clip arranged between a pair of wing shells, a hammer slidably inserted in the upper part of the shell, a thick spring arranged at the upper end of the hammer, a firing pin arranged at the lower end of the hammer, a delay top ring sleeved at the lower end of the firing pin, a thin spring arranged between the delay top ring and the hammer, and a limit cavity opened at the lower part of the shell; The excitation part includes a blocking block for blocking the hammer, and the biopsy part includes a cylindrical outer sheath slidably inserted in the lower end of the outer shell, a limiting ring fixedly sleeved on the outside of the outer sheath, a circumcision ring arranged at the lower end of the outer sheath, an inner core slidably inserted in the outer sheath, and a biopsy inner needle arranged at the lower end of the inner core, a scraping groove is provided on one side of the biopsy inner needle close to the needle head, the limiting ring is sleeved with the limiting cavity, and clamping grooves are symmetrically provided on the outer wall of the upper end of the outer sheath, a pair of the clamping grooves are clamped with two of the fixing clips, and when the hammer moves toward the upper end of the outer sheath, a pair of fixing clips are triggered to unfold and release the outer sheath.

[0007] As a further improvement of the technical solution, the biopsy inner needle is divided into a beveled needle at the lower end of the scraping groove, and the length of the outer sheath is greater than or equal to the length of the hose; a limiting needle tip is integrally formed at the lower end of the needle, and the limiting needle tip is adapted to the size of the lower end of the outer sheath; the two wing shells are symmetrical to each other and the spaces inside the shells are fan-shaped, the upper end of the fixing clamp on the same side is hinged at the center of the fan-shaped circle in the wing shell, and a concave-shaped clamp is integrally formed at the lower end of the fixing clamp, and convex-shaped clamp grooves matching the clamp are provided on both sides of the outer upper end of the outer sheath.

[0008] As a further improvement of the present technical solution, the firing pin is cylindrical in shape and its outer diameter is equal to the outer diameter of the inner core, a chamfer is provided at the circular edge of the lower end of the firing pin for easy insertion into the upper end port of the outer sheath, a first pin is integrally formed at the lower end of the firing pin, a first slot matching the first pin is provided at the upper end of the inner core, and the inner and outer diameters of the delay top ring are equal to the inner and outer diameters of the outer sheath.

[0009] As a further improvement of the present technical solution, the thin spring is fixedly connected between the hammer and the delay top ring, and the thin spring is also slidably sleeved on the outside of the firing pin. The two fixing clamps have inclined protrusions integrally formed on their mutually opposing inner sides, and the shortest distance between the two inclined protrusions is greater than the outer diameter of the thin spring and smaller than the outer diameter of the hammer.

[0010] As a further improvement of the technical solution, clamp springs are connected between the two outer walls of the two fixing clamps that are opposite to each other and the inner shell wall of the corresponding wing shell, and the wing shell, the clamp springs, the fixing clamps and the upper section of the outer sheath are all in the same plane; a fixing buckle is hinged on the lower outer wall of the outer shell, and a fixing column matching the fixing buckle is fixed on the side through pipe.

[0011] As a further improvement of the technical solution, the hammer is made of cylindrical metal material, and the outer diameter of the hammer is larger than the outer diameter of the delay top ring; the outer sheath and the inner core are both made of tough silicone material for bending with the hose, the thick spring, the hammer, the firing pin, the outer sheath and the limit ring are all coaxially arranged, and when the hammer slides downward, the lower end of the hammer can contact the inclined protrusion.

[0012] As a further improvement of the present technical solution, the length of the firing pin is equal to the sliding stroke of the limiting ring, the length of the firing pin is greater than or equal to the length of the biopsy inner needle, the distance between the lower end of the hammer and the oblique protrusion is less than or equal to the distance between the firing pin and the inner core, and the expansion and contraction amount of the thick spring is greater than or equal to the distance between the hammer and the outer sheath.

[0013] As a further improvement of the present technical solution, the limiting ring is cylindrical in shape and a trapezoidal groove is coaxially provided at its lower end, a plurality of second pins are vertically and evenly spaced integrally formed at the circumferential edge of the trapezoidal groove, the limiting cavity is cylindrical in shape and a plurality of second slots are provided on the circular inner groove plane at its lower end corresponding to each of the second pins, a plurality of clamping balls for clamping the outer sheath and the inner core are integrally formed at equal intervals in the trapezoidal groove.

[0014] As a further improvement of the present technical solution, the excitation part includes two symmetrical side panels fixedly arranged on one side of the shell, two fixed shafts connected between the two side plates, a blocking block and a wrench hinged on the upper fixed shaft, and two symmetrical hook blocks hinged on the lower fixed shaft.

[0015] As a further improvement of the technical solution, a protrusion for contacting and blocking the lower end of the hammer is integrally formed at the lower part of the upper edge of the blocking block, and the blocking block never contacts the fixed shaft at the bottom, and a hole is provided in the outer shell corresponding to the protrusion; the blocking block is located at the symmetry axis of the two side plates, and two symmetrical wing rods are integrally formed on the left and right sides of the blocking block corresponding to the bottom of the protrusion, a U-shaped hook groove is provided at the upper end of the hook block, and the wing rod is always located in the hook groove on the same side, and a clamping slot is provided at the corresponding bottom of the fixed shaft for the wrench, the hook block extends backward at the lower part of the hook groove and is inserted into the clamping slot, and the hook block does not contact the wrench at the upper part of the hook groove.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The novel puncture biopsy needle used by ultrasonic bronchoscope is provided with a shell, a fixing clamp, an oblique protrusion, a hammer, a thick spring, a firing needle, a delayed top ring and a thin spring in a shooting part, and an outer sheath, an inner core, a biopsy inner needle and a scraping groove in a biopsy part, so that after the thick spring is released to stimulate the hammer, the hammer first pushes open the fixing clamp, so that the firing needle impacts the inner core to drive the biopsy inner needle into the mediastinal lesion beside the patient's trachea or bronchus, and the thin spring delays and drives the delayed top ring to impact the outer sheath to cut off the lesion ring on the scraping groove, so that the biopsy of the mediastinal lesion beside the trachea or bronchus can be completed without manual control of the puncture force or repeated insertion and withdrawal of the lesion, thereby improving the positive rate of obtaining effective specimens, reducing the difficulty of operation for medical staff, being efficient and fast, and reducing the occurrence of complications.

[0017] 2. The new puncture biopsy needle used in ultrasonic bronchoscope has an excitation part, including a fixed axis, a blocking block, a protrusion, a wing rod, a hook block, a hook groove, a wrench and a hook groove, so that the trigger device can eject the biopsy inner needle and the outer sheath, which is simple and convenient, and all of them are mechanical structures without electronic components, and have high reliability. The limiting cavity, the second slot, the limiting ring fixed outside the outer sheath, the second pin, the first slot on the inner core, and the first pin at the lower end of the firing pin are set to limit the ejection stroke of the biopsy outer sheath and the biopsy inner needle, thereby fixing the penetration depth of the biopsy needle and reducing the safety risk of medical devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings described herein are only for explanation purposes and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the various components in the figures are only schematic, used to help understand the present invention, and are not specifically limited to the shapes and proportional dimensions of the various components of the present invention. Those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to the teachings of the present invention.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is one of the partial structural schematic diagrams of the biopsy part in the present invention; Figure 3 This is the second schematic diagram of the local structure of the biopsy part in the present invention; Figure 4 The third schematic diagram of the local structure of the biopsy part in the present invention; Figure 5 It is a schematic diagram of the partial cross-section structure of the shooting part of the present invention; Figure 6 It is a schematic diagram of the partial cross-sectional structure of the shooting part in the present invention; Figure 7 For the present invention Figure 5 A partial enlarged view of point B in the middle; Figure 8 This is a disassembled diagram of the fixing clip and the outer sheath in the present invention; Fig. 9 It is a schematic diagram of the structure of the limiting ring in the present invention; Fig.10 For the present invention Figure 1 A partial enlarged view of the middle A; Fig.11 It is an assembly and disassembly diagram of the shooting part and the exciting part in the present invention; Fig.12 It is one of the partial structural schematic diagrams of the excitation part in the present invention; Fig.13 For the present invention Fig.11 A partial enlarged view of point C in the middle; Fig.14 This is the second schematic diagram of the local structure of the excitation part in the present invention; Fig.15 The third schematic diagram of the local structure of the excitation part in the present invention; Fig.16 It is a schematic diagram of the structure of the blocking block in the present invention; The meaning of each number in the figure is: 1. Ultrasonic bronchoscope body; 10. Handle; 11. Side passage tube; 111. Fixed clamp column; 12. Flexible tube; 120. Bendable lens; 2. Shooting part; 20. Shell; 201. Wing shell; 202. Clip spring; 203. Fixing buckle; 21. Fixing clip; 210. Clip; 211. Oblique protrusion; 22. Hammer; 220. Thick spring; 221. Firing pin; 2210. First latch; 23. Delay top ring; 24. Thin spring; 25. Limiting cavity; 250. Second slot; 3. Excitation unit; 30. Side plate; 301. Fixed shaft; 31. Stop block; 310. Protrusion; 311. Wing rod; 32. Hook block; 320. Hook groove; 33. Wrench; 330. Card slot; 4. Biopsy part; 40. Outer sheath; 401. Clamping groove; 402. Limiting ring; 4020. Trapezoidal groove; 4021. Second latch; 4022. Clamping ball; 403. Circumcision ring; 41. Inner core; 410. First slot; 411. Biopsy inner needle; 4110. Scraping groove; 4111. Bevel needle; 4112. Limiting needle tip. DETAILED DESCRIPTION

[0020] The details of the present invention can be more clearly understood by combining the accompanying drawings with the description of the specific embodiments of the present invention. However, the specific embodiments of the present invention described herein are only used for the purpose of explaining the present invention and cannot be understood as limiting the present invention in any way. Under the guidance of the present invention, technicians can conceive of any possible variations based on the present invention, which should be regarded as falling within the scope of the present invention. The terms "installation" and "connection" should be understood in a broad sense, which can be directly connected or indirectly connected through an intermediate medium.

[0021] The terms "central axis", "vertical", "horizontal", "front", "back", "up", "down", "left", "right", "top", "bottom", "inside", "outside" and the like used herein to indicate positions or positional relationships are based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, in the description of the present invention, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0022] See also Figure 1-Figure 16 As shown, the present invention provides a novel puncture biopsy needle for use with an ultrasonic bronchoscope, comprising an ultrasonic bronchoscope body 1, wherein the ultrasonic bronchoscope body 1 comprises a handle 10, a side passage 11 disposed on one side of the handle 10, and a hose 12 connected to the lower end of the handle 10, wherein the lower end of the hose 12 is a bendable lens 120, and the side passage 11 is connected to the inside of the handle 10, and forms a puncture channel with the lower end of the hose 12; It includes a biopsy part 4 arranged in the puncture channel, a shooting part 2 arranged at the side passage 11 and used to control the expansion and contraction of the biopsy part 4 for sampling, and an exciting part 3 arranged below the middle of the shooting part 2 and used to trigger the shooting part 2. The lower end of the shooting part 2 is sleeve-connected with the upper end of the biopsy part 4. The shooting part 2 includes a cylindrical shell 20, two wing shells 201 arranged on both sides of the middle of the shell 20, a fixing clamp 21 arranged between the pair of wing shells 201, a hammer 22 slidably inserted in the upper section of the shell 20, a thick spring 220 arranged at the upper end of the hammer 22, a firing pin 221 arranged at the lower end of the hammer, a delay top ring 23 sleeved on the lower end of the firing pin 221, a thin spring 24 arranged between the delay top ring 23 and the hammer 22, and a limit cavity 25 opened at the lower part of the shell 20; The excitation part 3 includes a blocking block 31 for blocking the hammer 22, and the biopsy part 4 includes a cylindrical outer sheath 40 slidably inserted in the lower end of the outer shell 20, a limiting ring 402 fixedly sleeved on the outside of the outer sheath 40, a circumcision ring 403 arranged at the lower end of the outer sheath 40, an inner core 41 slidably inserted in the outer sheath 40, and a biopsy inner needle 411 arranged at the lower end of the inner core 41, a scraping groove 4110 is provided on one side of the biopsy inner needle 411 near the needle head, the limiting ring 402 is sleeved with the limiting cavity 25, and the upper end outer wall of the outer sheath 40 is symmetrically provided with clamping grooves 401, a pair of clamping grooves 401 are clamped with two fixing clips 21, and when the hammer 22 moves toward the upper end of the outer sheath 40, the pair of fixing clips 21 are triggered to unfold and release the outer sheath 40.

[0023] Among them, the biopsy inner needle 411 is divided into an oblique needle head 4111 at the lower end of the scraping groove 4110, the lower end of the oblique needle head 4111 can puncture into the lesion tissue, and the upper end of the oblique needle head 4111 can cooperate with the circumcision ring 403 to remove the biopsy tissue in the scraping groove 4110; the length of the outer sheath 40 is greater than or equal to the length of the hose 12, so as to match the ultrasonic bronchoscope body 1 so that the biopsy inner needle 411 can reach the lesion; the lower end of the needle head 4111 is integrally formed with a limiting needle tip 4112, and the limiting needle tip 4112 is adapted to the size of the lower end of the outer sheath 40, so as to limit the needle tip 411 2 can limit the outer sheath 40 from sliding beyond the depth where the biopsy inner needle 411 is located, and facilitate the removal of the biopsy inner needle 411 after the biopsy to remove the lesion tissue; the two wing shells 201 are symmetrical to each other and the space inside the shells is fan-shaped. The upper end of the fixing clamp 21 on the same side is hinged at the center of the fan-shaped circle in the wing shell 201, and a concave clamp head 210 is integrally formed at the lower end of the fixing clamp 21. Both sides of the outer upper end of the outer sheath 40 are provided with convex clamping grooves 401 matching the clamp head 210; therefore, when the clamp head 210 clamps the clamping groove 401 of the outer sheath 40, the outer sheath 40 and the inner core 41 can be fixed without sliding or rotating.

[0024] Specifically, the firing pin 221 is cylindrical in shape and its outer diameter is equal to the outer diameter of the inner core 41. The firing pin 221 has a chamfered edge at the lower circular edge to facilitate insertion into the upper port of the outer sheath 40, so that the firing pin 221 can be inserted into the outer sheath 40 to impact the inner core 41; a first pin 2210 is integrally formed at the lower end of the firing pin 221, and a first slot 410 matching the first pin 2210 is provided at the upper end of the inner core 41. After the firing pin 221 impacts the inner core 41, the first pin 2210 can be inserted into the first slot 410, so that the inner core 41 no longer slides too much; the inner and outer diameters of the delay top ring 23 are equal to the inner and outer diameters of the outer sheath 40, so that the impact of the delay top ring 23 can only act on the outer sheath 40.

[0025] Furthermore, the fine spring 24 is fixedly connected between the hammer 22 and the delay top ring 23, and the fine spring 24 is also slidably sleeved on the outside of the firing pin 221, so that the delay top ring 23 can slide later than the firing pin 221, and the two fixing clamps 21 are integrally formed with inclined protrusions 211 on the inner sides opposite to each other. The shortest distance between the two inclined protrusions 211 is greater than the outer diameter of the fine spring 24 and smaller than the outer diameter of the hammer 22, thereby ensuring that the firing pin 221, the delay top ring 23 and the fine spring 24 will not contact the inclined protrusions 211 when sliding.

[0026] Preferably, a clamp spring 202 is connected between the two opposite outer walls of the two fixing clamps 21 and the inner shell wall of the corresponding wing shell 201, and the wing shell 201, the clamp spring 202, the fixing clamp 21 and the upper section of the outer sheath 40 are all in the same plane, and the clamp spring 202 can give a certain combined force to the two fixing clamps 21 when the fixing clamp 21 has not been pushed open by the hammer 22; a fixing buckle 203 is hinged on the lower outer wall of the outer shell 20, and a fixing column 111 matching the fixing buckle 203 is fixed on the side passage 11. When the medical staff completely slides and inserts the biopsy part 4 into the side passage 11, the fixing buckle 203 can facilitate fixing the shooting part 2 at the side passage 11.

[0027] Secondly, the hammer 22 is made of cylindrical metal, and the outer diameter of the hammer 22 is larger than the outer diameter of the delay top ring 23, so that when the hammer 22 is released by the thick spring 220 to slide, the hammer 22 will not exceed the chuck 210; the outer sheath 40 and the inner core 41 are both made of tough silicone material for bending with the hose 12, and both can achieve accurate transmission of the excitation force when bending in the bronchoscope. The thick spring 220, hammer 22, firing pin 221, outer sheath 40 and limit ring 402 are all coaxially arranged, and when the hammer 22 slides downward, the lower end of the hammer 22 can contact the inclined protrusion 211.

[0028] Specifically, the length of the firing pin 221 is equal to the sliding stroke of the limiting ring 402, and the length of the firing pin 221 is greater than or equal to the length of the biopsy inner needle 411, so that the biopsy inner needle 411 and the corresponding section of the outer sheath 40 can completely puncture into the lesion site, and the outer sheath 40 will be restricted by the limiting ring 402 so that it will not puncture too much. The distance between the lower end of the hammer 22 and the oblique protrusion 211 is less than or equal to the distance between the firing pin 221 and the inner core 41, so as to ensure that before the firing pin 221 hits the inner core 41, the hammer 22 can contact the oblique protrusion 211 to push open the fixing clamp 21 to release the outer sheath 40 and the inner core 41, thereby allowing the outer sheath 40 and the inner core 41 to be impacted and slide downward, and the expansion and contraction amount of the thick spring 220 is greater than or equal to the distance between the hammer 22 and the outer sheath 40, so that the firing pin 221 can be completely inserted into the outer sheath 40.

[0029] Preferably, the limiting ring 402 is cylindrical in shape and has a trapezoidal groove 4020 coaxially formed at its lower end, and a plurality of second latch pins 4021 are integrally formed vertically and evenly spaced at the circumferential edge of the trapezoidal groove 4020; the limiting cavity 25 is cylindrical in shape and has a plurality of second slots 250 formed on the circular inner groove plane at its lower end corresponding to each second latch pin 4021; the trapezoidal groove 4020 has a plurality of integrally formed slots 250 for clamping the outer sheath 40 and the inner core 41 at equal intervals in the groove Dry clamping ball 4022; when the limit ring 402 slides downward to the limit distance along with the outer sheath 40, the second pin 4021 can be inserted into the second slot 250, thereby preventing the outer sheath 40 from continuing to slide, and at the same time the clamping ball 4022 squeezes the circular inner groove plane at the lower end of the limit cavity 25, so that the inclined groove surface of the trapezoidal groove 4020 forces the clamping ball 4022 to shrink toward the axis of the inner core 41, thereby preventing the inner core 41 and the outer sheath 40 from continuing to slide, reducing the risk of excessive puncture.

[0030] In addition, the excitation part 3 includes two symmetrical side panels 30 fixedly arranged on one side of the outer shell 20, two fixed shafts 301 connected between the two side panels 30, a blocking block 31 and a wrench 33 hinged on the upper fixed shaft 301, and two symmetrical hook blocks 32 hinged on the lower fixed shaft 301.

[0031] Preferably, a protrusion 310 for contacting and blocking the lower end of the hammer 22 is integrally formed at the lower part of the upper edge of the blocking block 31, and the blocking block 31 never contacts the lower fixed shaft 301, and a hole is provided at the corresponding protrusion 310 of the shell 20. When the excitation unit 3 is in operation, the excitation unit 3 will not contact the shell 20; the blocking block 31 is located at the symmetry axis of the two side plates 30, and two symmetrical wing rods 311 are integrally formed at the lower parts of the left and right sides of the blocking block 31 corresponding to the protrusions 310. A U-shaped hook groove 320 is provided at the upper end of the hook block 32, and the wing rod 311 is always located in the hook groove 320 on the same side. A slot 330 is provided at the corresponding lower part of the fixed shaft 301 for the wrench 33, and the hook block 32 extends backward at the lower part of the hook groove 320 and is inserted in the slot 330, and the upper part of the hook block 32 does not contact the wrench 33; Fig.15 When the operator pulls the wrench 33, the hook block 32 rotates along the corresponding fixed axis 301, and the hook block 32 disengages from the slot 330 at the lower part of the hook slot 320, so that the limit of the hook slot 320 on the wing rod 311 becomes loose, and at the same time, with the extension force of the thick spring 220 acting on the protrusion 310, the blocking block 31 rotates along the corresponding fixed axis 301, thereby causing the protrusion 310 to rotate and descend and release the hammer 22.

[0032] The working principle of the present invention is as follows: the medical staff operator controls the flexible lens 120 to extend from the nose of the anesthetized patient to the side of the mediastinal lesion in the trachea or bronchus according to the relevant operations of the ultrasonic bronchoscope body 1; then, the lower end of the outer sheath 40 of the biopsy part 4 is slowly slid and inserted into the side tube 11 to reach the flexible lens 120, and the hinged fixing buckle 203 is rotated to snap into the fixing clamp column 111; then, the wrench 33 is pulled to release the hammer 22, and the hammer 22 contacts the inclined protrusion 211 to push open the fixing clamp 21 to release the outer sheath 40 and the inner core 41, and the firing pin 221 slides downward with the hammer 22, and the firing pin 221 is inserted into the outer sheath 40 to impact the inner core 41, so that the biopsy part 4 The inner needle 411 penetrates into the lesion, and then the delayed top ring 23 delays the impact on the outer sheath 40, so that the circumcision ring 403 also slides downward to remove the biopsy tissue in the scraping groove 4110; at the same time, the first pin 2210 is inserted into the first slot 410 so that the inner core 41 is fixed at the lower end of the firing pin 221 and will not penetrate too deeply or retract; the limiting ring 402 is also slidably inserted into the lowest part of the limiting cavity 25, and the second pin 4021 is inserted into the second slot 250, so that the outer sheath 40 that slides with the delayed sliding of the firing pin 221 cannot continue to slide, and will not penetrate too deeply or retract, and the clamping ball 4022 is then tightened inward to clamp the outer sheath 40 and the inner core 41; Afterwards, open the fixing buckle 203, hold the shooting part 2 and pull out the biopsy part 4; finally, hold the outer sheath 40 with one hand, clamp the limiting needle tip 4112 with tweezers or other sterile clamping tools after disinfection and pull out the biopsy inner needle 411, and take the lesion tissue on the scraping groove 4110 for inspection.

[0033] Finally, it should be noted that the above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A novel puncture biopsy needle for use with an ultrasonic bronchoscope, comprising an ultrasonic bronchoscope body (1), the ultrasonic bronchoscope body (1) comprising a handle (10), a side passage tube (11) arranged on one side of the handle (10), and a hose (12) connected to the lower end of the handle (10), the lower end of the hose (12) being a bendable lens (120), the side passage tube (11) being in communication with the interior of the handle (10), and forming a puncture channel between the side passage tube (11) and the lower end of the hose (12); Features: It comprises a biopsy part (4) arranged in the puncture channel, a shooting part (2) arranged at the side passage (11) and used to control the biopsy part (4) to retract and sample, and an exciting part (3) arranged below the middle of the shooting part (2) and used to trigger the shooting part (2), wherein the lower end of the shooting part (2) is sleeve-connected with the upper end of the biopsy part (4); The shooting part (2) comprises a cylindrical shell (20), two wing shells (201) arranged on both sides of the middle part of the shell (20), a fixing clamp (21) arranged between the pair of wing shells (201), a hammer (22) slidably inserted into the upper part of the shell (20), a thick spring (220) arranged at the upper end of the hammer (22), a firing pin (221) arranged at the lower end of the hammer, a delay top ring (23) sleeved on the lower end of the firing pin (221), a thin spring (24) arranged between the delay top ring (23) and the hammer (22), and a limit cavity (25) opened at the lower part of the shell (20); The excitation section (3) comprises a blocking block (31) for blocking the hammer (22); the biopsy section (4) comprises a cylindrical outer sheath (40) slidably inserted in the lower end of the outer shell (20), a limiting ring (402) fixedly sleeved on the outside of the outer sheath (40), a circumcision ring (403) arranged at the lower end of the outer sheath (40), an inner core (41) slidably inserted in the outer sheath (40), and a biopsy inner needle arranged at the lower end of the inner core (41). (411), a scraping groove (4110) is provided on one side of the biopsy inner needle (411) near the needle tip, the limiting ring (402) is sleeved with the limiting cavity (25), the upper outer wall of the outer sheath (40) is symmetrically provided with clamping grooves (401), a pair of the clamping grooves (401) is clamped with the two fixing clips (21), and when the hammer (22) moves toward the upper end of the outer sheath (40), it triggers the pair of fixing clips (21) to unfold and release the outer sheath (40).

2. The novel puncture biopsy needle for use via ultrasonic bronchoscope according to claim 1, characterized in that: The biopsy inner needle (411) is divided into an oblique needle head (4111) at the lower end of the scraping groove (4110); the length of the outer sheath (40) is greater than or equal to the length of the hose (12); a limiting needle tip (4112) is integrally formed at the lower end of the needle head (4111), and the limiting needle tip (4112) is adapted to the size of the lower end of the outer sheath (40); the two wing shells (201) are symmetrical to each other and the spaces inside the shells are both fan-shaped, the upper end of the fixing clamp (21) on the same side is hinged at the center of the fan-shaped circle inside the wing shell (201), and a concave clamp head (210) is integrally formed at the lower end of the fixing clamp (21), and convex clamp grooves (401) matching the clamp head (210) are provided on both sides of the outer upper end of the outer sheath (40).

3. The novel puncture biopsy needle for use via ultrasonic bronchoscope according to claim 1, characterized in that: The firing pin (221) is cylindrical in shape and its outer diameter is equal to the outer diameter of the inner core (41); a chamfer is provided at the circular edge of the lower end of the firing pin (221) for easy insertion into the upper end port of the outer sheath (40); a first latch (2210) is integrally formed at the lower end of the firing pin (221); a first slot (410) matching the first latch (2210) is provided at the upper end of the inner core (41); and the inner and outer diameters of the delay top ring (23) are equal to the inner and outer diameters of the outer sheath (40).

4. The novel puncture biopsy needle for use via ultrasonic bronchoscope according to claim 1, characterized in that: The thin spring (24) is fixedly connected between the hammer (22) and the delay top ring (23), and the thin spring (24) is also slidably sleeved on the outside of the firing pin (221). The two fixing clamps (21) are integrally formed with oblique protrusions (211) on the inner sides opposite to each other, and the shortest distance between the two oblique protrusions (211) is greater than the outer diameter of the thin spring (24) and smaller than the outer diameter of the hammer (22).

5. The novel puncture biopsy needle for use via ultrasonic bronchoscope according to claim 1, characterized in that: A clamp spring (202) is connected between two opposite outer side walls of the two fixing clamps (21) and the inner shell wall of the corresponding wing shell (201); the wing shell (201), the clamp spring (202), the fixing clamp (21) and the upper section of the outer sheath (40) are all located in the same plane; a fixing buckle (203) is hingedly connected to the lower outer side wall of the outer shell (20); and a fixing clamp column (111) matching the fixing buckle (203) is fixed to the side passage (11).

6. The novel puncture biopsy needle for use via ultrasonic bronchoscope according to claim 4, characterized in that: The hammer (22) is made of metal in a cylindrical shape, and the outer diameter of the hammer (22) is greater than the outer diameter of the delay top ring (23); the outer sheath (40) and the inner core (41) are both made of a tough silicone material that can bend with the hose (12); the thick spring (220), the hammer (22), the firing pin (221), the outer sheath (40) and the limit ring (402) are all coaxially arranged, and when the hammer (22) slides downward, the lower end of the hammer (22) can contact the inclined protrusion (211).

7. The novel puncture biopsy needle for use via ultrasonic bronchoscope according to claim 4, characterized in that: The length of the firing pin (221) is equal to the sliding stroke of the limiting ring (402), the length of the firing pin (221) is greater than or equal to the length of the biopsy inner needle (411), the distance between the lower end of the hammer (22) and the inclined protrusion (211) is less than or equal to the distance between the firing pin (221) and the inner core (41), and the expansion and contraction amount of the thick spring (220) is greater than or equal to the distance between the hammer (22) and the outer sheath (40).

8. The novel puncture biopsy needle for use via ultrasonic bronchoscope according to claim 1, characterized in that: The limiting ring (402) is cylindrical in shape and has a trapezoidal groove (4020) coaxially formed at its lower end; a plurality of second latch pins (4021) are integrally formed vertically and evenly spaced at the circumferential edge of the trapezoidal groove (4020); the limiting cavity (25) is cylindrical in shape and has a plurality of second slots (250) formed on the circular inner groove plane at its lower end corresponding to each second latch pin (4021); a plurality of clamping balls (4022) for clamping the outer sheath (40) and the inner core (41) are integrally formed at even intervals in the groove of the trapezoidal groove (4020).

9. The novel puncture biopsy needle for use via ultrasonic bronchoscope according to claim 1, characterized in that: The excitation portion (3) comprises two symmetrical side plates (30) fixedly arranged on one side of the housing (20), two fixed shafts (301) connected between the two side plates (30), a blocking block (31) and a wrench (33) hinged on the upper fixed shaft (301), and two symmetrical hook blocks (32) hinged on the lower fixed shaft (301).

10. The novel puncture biopsy needle for use via ultrasonic bronchoscope according to claim 9, characterized in that: A protrusion (310) for contacting and blocking the lower end of the hammer (22) is integrally formed at the lower portion of the upper edge of the blocking block (31), and the blocking block (31) never contacts the lower fixed shaft (301), and a hole is provided in the housing (20) corresponding to the protrusion (310); the blocking block (31) is located at the symmetry axis of the two side plates (30), and two wings symmetrical to each other are integrally formed on the left and right sides of the blocking block (31) corresponding to the lower portion of the protrusion (310). The hook block (32) is provided with a U-shaped hook groove (320) at the upper end thereof, the wing rod (311) is always located in the hook groove (320) on the same side, the wrench (33) is provided with a clamping groove (330) below the corresponding fixed shaft (301), the hook block (32) extends backward at the lower part of the hook groove (320) and is inserted into the clamping groove (330), and the hook block (32) does not contact the wrench (33) at the upper part of the hook groove (320).

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