Semi-automatic biopsy needle and puncture system for endoscopy

Abstract

The present application discloses a semi-automatic biopsy needle and puncture system for endoscopy, wherein the semi-automatic biopsy needle comprises a housing and a needle core and a needle tube which are nested from the inside to the outside in sequence, wherein the proximal end of the needle core serves as a driving end and extends out of the needle tube, and further comprises a slider, an elastic member, a limiting tooth and a push rod, wherein the slider is slidably installed in the housing, and the proximal end of the needle tube is fixed to the slider, and a plurality of gear-position latches are arranged on the slider; the elastic member is installed in the housing to drive the slider to move toward the distal end; the limiting tooth is movably installed in the housing and cooperates with the gear-position latches to limit the movement of the slider toward the distal end; the push rod is fixed to the driving end of the needle core, and the push rod at least comprises an operating part located outside the housing, a transmission part which is unidirectionally linked with the slider to only drive the slider to move toward the proximal end, and an unlocking part which drives the limiting tooth to separate from the gear-position latches. Compared with the prior art, the setting of a plurality of gear-position latches in this scheme can adjust the puncture depth of the needle core, so as to control the depth of the needle core puncturing the tissue.

Description

Technical Field

[0001] The present application relates to the field of medical equipment, and in particular to a semi-automatic biopsy needle and puncture system for endoscopy. Background Art

[0002] Lung cancer has become one of the malignant tumors with the fastest growing incidence and mortality, and the greatest threat to people's health and life. The diagnosis of lung cancer needs to rely on clinical symptoms, signs, imaging examinations and pathological examinations. The most effective way is to perform a biopsy through histopathological examination, and in pathological examination, bronchoscopic biopsy is more widely used.

[0003] The commonly used biopsy instruments for obtaining tissue specimens under existing bronchoscopes are biopsy forceps and biopsy needles. Among them, biopsy forceps are mainly used for biopsy of lesions in the lumen, but the biopsy specimens obtained are small, and there are disadvantages of incomplete specimens and being squeezed, and multiple clamping of samples is required to complete an effective biopsy. The existing biopsy tools for lesions outside the lumen or near the lumen are mainly puncture needles, which require the operator to connect negative pressure at the distal end of the puncture needle and manually move the puncture needle repeatedly in the lesion to achieve cutting sampling, but the sampling rate is low, the operation is complicated, and repeated cutting also has the disadvantage of destroying tissue integrity. Therefore, the present invention intends to develop a flexible semi-automatic biopsy needle for use under endoscopy, which realizes semi-automatic cutting sampling of target lesions (such as peripheral lung nodules or masses, enlarged lymph nodes in the chest, etc.) under endoscopy, and achieves the purpose of obtaining larger and more complete samples on the basis of convenience and safety. Summary of the invention

[0004] In order to solve the above technical problems, the present application discloses a semi-automatic biopsy needle for endoscopy, which has a distal end and a proximal end relative to each other. The semi-automatic biopsy needle comprises a shell and a needle core and a needle tube nested in sequence from the inside to the outside. The proximal end of the needle core serves as a driving end and extends out of the needle tube. The semi-automatic biopsy needle also comprises:

[0005] A slider is slidably mounted in the housing, the proximal end of the needle tube is fixed to the slider, and a plurality of gear teeth are arranged on the slider;

[0006] An elastic member installed in the housing to drive the slider to move toward the distal end;

[0007] A limiting tooth, movably installed in the housing and cooperating with the gear locking tooth to limit the movement of the slider toward the distal end;

[0008] A push rod is fixed to the driving end of the needle core, and the push rod at least includes an operating part located outside the shell, a transmission part that is unidirectionally linked with the slider and only drives the slider to move toward the proximal end, and an unlocking part that drives the limit tooth to separate from the gear latch tooth.

[0009] Several optional methods are also provided below, but they are not intended to be additional limitations on the above-mentioned overall solution, but are merely further supplements or preferences. Under the premise that there are no technical or logical contradictions, each optional method can be combined with the above-mentioned overall solution separately, and multiple optional methods can also be combined.

[0010] Optionally, the slider is directly or indirectly provided with a gear position mark, and the housing is provided with a window corresponding to the position of the gear position mark.

[0011] Optionally, the slider has a top side and a bottom side opposite to each other, the needle tube and the gear mark are both located on the top side of the slider, and the gear teeth are arranged in sequence from the proximal end to the distal end on the bottom side of the slider;

[0012] Each gear-position latching tooth has a guiding tooth surface facing the proximal end and a locking tooth surface facing the distal end, and the limiting tooth is limited by the locking tooth surface corresponding to the position.

[0013] Optionally, the bottom surface of the sliding block has a slot at a position adjacent to the distal end, and the transmission portion of the push rod is combined with the slot to act on a slot wall of the slot facing the distal end.

[0014] Optionally, the shell includes an upper cover and a lower cover that are interlocked, the upper cover and the lower cover form an installation chamber for accommodating the slider, the window is opened in the upper cover, and the limiting tooth is located in the lower cover.

[0015] Optionally, handles are fixed on two opposite sides of the lower cover.

[0016] Optionally, the push rod extends through the bottom side of the lower cover, an avoidance groove is provided on the bottom side of the lower cover, and the transmission part of the push rod extends into the installation chamber through the avoidance groove.

[0017] Optionally, the shell further includes a cover plate, which is buckled onto the bottom side of the lower cover.

[0018] Optionally, the limiting tooth and the lower cover are an integral structure, and the limiting tooth is configured to be switchable between the following states:

[0019] The locking position abuts against the corresponding gear teeth to keep the slider in the current gear position;

[0020] The unlocking position is a position in which the unlocking portion of the push rod is separated from the gear teeth by its own deformation, allowing the slider to drive the needle tube to move toward the distal end under the drive of the elastic member.

[0021] Optionally, the elastic member is a compression spring abutting between the housing and the proximal side of the slider.

[0022] Optionally, the transmission portion of the push rod is hook-shaped, and the unlocking portion is located at the distal end side of the transmission portion.

[0023] Optionally, the proximal side of the limiting tooth has a guiding slope that cooperates with the unlocking portion.

[0024] Optionally, a limit block is movably installed on the proximal side of the shell, and the limit block has a first position that interferes with the push rod and a second position that avoids the push rod.

[0025] Optionally, the push rod has the following features when moving toward the distal end:

[0026] In the third position, the operating portion abuts against the limit block in the first position, and the limit tooth is in the locking position;

[0027] In the fourth position, the operating portion passes over the limiting block in the second position until it abuts against the proximal end side of the shell, and the unlocking portion abuts against the limiting tooth, driving the limiting tooth to enter the unlocking position.

[0028] Optionally, a sliding groove for the limit block to slide is provided on the proximal side of the shell, so as to limit the movement path of the limit block.

[0029] Optionally, the limit block has a locking groove, and the proximal side of the shell is provided with a locking piece that matches the locking groove to limit the limit block.

[0030] Optionally, the locking member includes:

[0031] A column, one end of which is connected to the proximal side of the housing and the other end of which passes through the locking slot;

[0032] The limiting head is fixed to one end of the column passing through the locking slot and is limited by the locking slot.

[0033] Optionally, the locking member is a fastening screw, and the shell is provided with a screw groove threadably connected to the fastening screw.

[0034] Optionally, the semi-automatic biopsy needle further comprises a length adjustment tube connected to the distal end of the shell, and the needle tube and the needle core further extend toward the distal end through the interior of the length adjustment tube.

[0035] Optionally, the length adjustment tube includes:

[0036] A first sleeve, one end of which is connected to the housing;

[0037] A second sleeve, slidably sleeved with the first sleeve;

[0038] The fastener acts on the first sleeve and the second sleeve to limit the relative position of the two.

[0039] Optionally, the proximal end of the first sleeve is threadedly connected to the shell, and the second sleeve is sleeved on the outer circumference of the first sleeve.

[0040] Optionally, a first mounting hole is formed on the side wall of the second sleeve, and the fastener is a fastening screw threadedly connected to the first mounting hole, and one end of the fastening screw is in abutment with the outer wall of the first sleeve.

[0041] Optionally, a limiting step is provided on an outer wall of one end of the first sleeve inside the second sleeve, and an anti-dropping screw cooperating with the limiting step is passed through a side wall of the second sleeve.

[0042] Optionally, the semi-automatic biopsy needle further comprises a connecting assembly connected to the distal end of the second sleeve, wherein the connecting assembly has an adapting structure corresponding to the channel opening of the endoscope.

[0043] Optionally, the connection component includes:

[0044] A joint, movably sleeved at the distal end of the second sleeve;

[0045] A connecting piece is threadedly connected to the joint and can be snap-fitted with the endoscope channel opening.

[0046] Optionally, the outer side wall of the second sleeve has a boss, the distal end of the second sleeve is threaded with a plug, the boss and the plug are respectively located at two axial ends of the joint to axially position the joint.

[0047] Optionally, the plug has a through hole for the needle tube to pass through.

[0048] Optionally, the distal side wall of the needle core has a sampling groove, and the distal end of the needle tube can pass over and open the sampling groove;

[0049] The distal ends of the needle core and the needle tube converge to form a sharp point.

[0050] The present application also provides a puncture system, which comprises the semi-automatic biopsy needle and the endoscopic device described in the present application;

[0051] The endoscope device comprises at least one working channel for the needle core and the needle tube to extend, an endoscope channel opening communicating with the working channel is provided at the proximal end of the endoscope device, and the semi-automatic biopsy needle is connected to the endoscope channel opening.

[0052] The endoscopic semi-automatic biopsy needle and puncture system in the present application controls the puncture depth of the needle core, and the sampling groove on the needle core can achieve the purpose of satisfying the requirements with a single sampling, thereby reducing the duration of the operation and alleviating the operator's workload and sampling difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 A schematic diagram of the structure of a puncture system in an embodiment provided in the present application;

[0054] Figure 2 for Figure 1 Schematic diagram of the exploded structure of the puncture system;

[0055] Figure 3 for Figure 1 Cross-sectional view of the semi-automatic biopsy needle;

[0056] Figure 4 for Figure 3 Partial view of the semi-automatic biopsy needle;

[0057] Figure 5 for Figure 4 A structural schematic diagram of the puncture state of the semi-automatic biopsy needle;

[0058] Figure 6 for Figure 4 A structural schematic diagram of the puncture state of the semi-automatic biopsy needle;

[0059] Figure 7 for Figure 1 Partial cross-sectional view of the semi-automatic biopsy needle;

[0060] Figure 8 for Figure 1 Schematic diagram of the structure of the middle needle tube and the needle core;

[0061] Fig. 9 for Figure 1 Schematic diagram of the structure of the middle needle tube and the needle core;

[0062] Fig.10 for Figure 1 Schematic diagram of the exploded structure of the middle shell;

[0063] Fig.11 for Figure 3 A schematic diagram of the structure of the middle housing and the push rod;

[0064] Fig.12 for Fig.11 Schematic diagram of the exploded structure of the middle housing and the push rod;

[0065] Fig.13 for Figure 3 A schematic diagram of the structure of the middle slider and the gear position mark;

[0066] Fig.14 for Fig.13 Schematic diagram of the exploded structure of the middle slider and gear position mark;

[0067] Fig.15 for Figure 1 A schematic diagram of a structure in which the limit block is in a first position;

[0068] Fig.16 for Figure 1 A schematic diagram of a structure in which the limit block is in the second position;

[0069] Fig.17 for Figure 2 Schematic diagram of the structure of the middle joint;

[0070] Fig.18 for Figure 2 Schematic diagram of the structure of the middle plug;

[0071] Fig.19 for Figure 2 Schematic diagram of the structure of the connecting parts;

[0072] Fig. 20 for Figure 2 Schematic diagram of the structure of the endoscope channel opening.

[0073] The reference numerals in the figures are described as follows:

[0074] 100, semi-automatic biopsy needle; 101, distal end; 102, proximal end;

[0075] 10. needle tube; 11. needle core; 111. driving end; 112. sampling slot; 13. sharp part;

[0076] 20. Shell; 21. Upper cover; 211. Window; 212. First card block; 22. Lower cover; 221. Holding handle; 222. Avoidance slide groove; 223. Guide slide groove; 224. Through hole; 225. First card slot; 226. Second card slot; 23. Installation chamber; 24. Cover plate; 241. Second card block;

[0077] 30. Slider; 31. Gear position latch; 311. Guide tooth surface; 312. Locking tooth surface; 32. Slot; 33. Gear position mark; 331. Snap-fit ​​block; 34. Elastic member; 35. Guide portion; 36. Snap-fit ​​groove;

[0078] 40. Limiting tooth; 41. Guide slope; 42. Cantilever; 43. Tooth tip;

[0079] 50. Push rod; 51. Operating part; 52. Transmission part; 53. Unlocking part; 54. Fixing block;

[0080] 60, limit block; 61, slide slot; 62, lock slot; 63, locking piece; 631, column; 632, limit head; 64, fixing plate;

[0081] 70. Length adjustment tube; 71. First sleeve; 711. Position limiting step; 72. Second sleeve; 73. Fastener; 74. Anti-slip screw;

[0082] 80. Connecting assembly; 81. Connector; 811. First part; 812. Second part; 82. Connector; 821. Snap-fit ​​groove; 822. Supporting groove; 823. Screw-fit column; 83. Plug; 831. Through hole; 832. Screw-fit section; 833. Extension section; 84. Boss;

[0083] 90. Tube body; 91. Endoscope channel opening; 92. Annular groove. DETAILED DESCRIPTION

[0084] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0085] It should be noted that when a component is referred to as being "connected" to another component, it may be directly connected to the other component or there may be a central component. When a component is referred to as being "disposed on" another component, it may be directly disposed on the other component or there may be a central component at the same time.

[0086] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0087] Reference Figure 1 To Attachment Figure 7 As shown, the present application discloses a semi-automatic biopsy needle 100 for endoscopy, which has a distal end 101 and a proximal end 102 opposite to each other. The semi-automatic biopsy needle 100 includes a housing 20 and a needle core 11 and a needle tube 10 nested in sequence from the inside to the outside. The proximal end of the needle core 11 serves as a driving end 111 and extends out of the needle tube 10. The semi-automatic biopsy needle 100 also includes:

[0088] The slider 30 is slidably mounted in the housing 20 , the proximal end of the needle tube 10 is fixed to the slider 30 , and a plurality of gear teeth 31 are arranged on the slider 30 ;

[0089] An elastic member 34 is installed in the housing 20 to drive the slider 30 to move toward the distal end;

[0090] The limiting tooth 40 is movably installed in the housing 20 and cooperates with the gear locking tooth 31 to limit the slider 30 from moving toward the distal end;

[0091] The push rod 50 is fixed to the driving end 111 of the needle core 11, and the push rod 50 at least includes an operating part 51 located outside the shell 20, a transmission part 52 that is unidirectionally linked with the slider 30 and only drives the slider 30 to move toward the proximal end, and an unlocking part 53 that drives the limit tooth 40 to separate from the gear latch tooth 31.

[0092] Unless otherwise specified, the “distal end 101 ” in this embodiment and the following embodiments refers to the end close to the lesion, that is, away from the operator, and the “proximal end 102 ” refers to the opposite.

[0093] The semi-automatic biopsy needle 100 of this embodiment is provided with a plurality of gears to facilitate control of the puncture depth. When the gear is preset, the push rod 50 can be pulled, and the push rod 50 drives the needle core 11, the slider 30 and the needle tube 10 to move toward the proximal end as a whole. At this time, the slider 30 compresses the elastic member 34. When the limit tooth 40 cooperates with the corresponding gear latch tooth 31, the push rod 50 is stopped from being pulled, and the slider 30 is kept at the current gear by the limit tooth 40. The current gear also determines the maximum length of the needle core 11 that can be exposed when the needle core 11 and the distal end of the needle tube 10 cooperate with each other.

[0094] After adjusting the relative position between the distal end of the needle core 11 and the target tissue, push the push rod 50 to make the needle core 11 puncture into the target component. After the needle core 11 punctures in place, the unlocking part 53 drives the limiting tooth 40 to separate from the gear locking tooth 31 through the push rod 50. At this time, under the action of the elastic member 34, the slider 30 slides to the distal end, and the slider 30 drives the needle tube 10 to cooperate with the needle core 11 to cut the tissue to complete the cutting action. The adjustment of the gear position and the release of the slider 30 are both achieved through the push rod 50, which reduces the number of control components and further optimizes the structure.

[0095] The shape of the housing 20 is not strictly limited. For example, the housing 20 is roughly in the shape of a cube, a round rod, etc., and along the movement direction of the needle core 11, the housing 20 as a whole is in the shape of a strip having a length direction. In order to facilitate the assembly of other components, a split structure can be adopted, that is, the housing 20 includes two half shells that are interlocked. Of course, in order to facilitate local maintenance or operation, it can also be divided into more parts. In order to facilitate the mutual fixation between the two half shells, various methods such as buckles and screws can be used.

[0096] The cross section of the needle tube 10 is not strictly limited (e.g., a circular ring in the figure); the proximal end of the needle tube 10 is connected to the slider 30 by bonding or the like, and both ends of the needle tube 10 are open so that the needle core 11 can pass through the needle tube 10. The needle tube 10 and the needle core 11 are coaxially arranged; when the needle core 11 penetrates into the needle tube 10, the outer wall of the needle core 11 can be in contact with the inner wall of the needle tube 10.

[0097] The driving end 111 of the needle core 11 is fixed to the push rod 50 by bonding or other methods, and the push rod 50 can drive the needle core 11 to move through the driving end 111. There is no strict restriction on the driving end 111 of the needle core 11. For example, the portion of the needle core 11 exposed outside the needle tube 10 is the driving end 111.

[0098] The slider 30 can reciprocate along the axis of the needle tube 10 or the needle core 11 in the housing 20. For example, in order to limit the movement path of the housing 20, two opposite sides of the slider 30 are provided with guide portions 35, and the inner wall of the housing 20 is provided with guide grooves 223 that cooperate with the guide portions 35, so as to limit the movement path of the slider 30.

[0099] A plurality of gear latches 31 are arranged in sequence along the movement direction of the slider 30; the cooperation between the gear latches 31 and the limit teeth 40 can adjust the puncture depth of the needle core 11, thereby controlling the depth of the needle core 11 puncturing the tissue, so that the semi-automatic biopsy needle 100 can be controlled during puncture.

[0100] The gear teeth 31 are arranged in pairs, and the gear teeth 31 of the same pair are respectively located on two opposite sides of the slider 30. Correspondingly, the limiting teeth 40 cooperate with the gear teeth 31 in the same pair. The number of the gear teeth 31 is adjusted according to the actual application, such as 2 pairs, 3 pairs, or 4 pairs or more. In the figure, the number of the gear teeth 31 is 4 pairs.

[0101] The operating portion 51 on the push rod 50 is not strictly limited. For example, the portion of the push rod 50 exposed outside the housing 20 is the operating end. As shown in the figure, the operating portion 51 is roughly L-shaped.

[0102] In this embodiment, if Figures 8 to 9 As shown, the distal side wall of the needle core 11 has a sampling groove 112 , and the distal end of the needle tube 10 can pass over and open the sampling groove 112 .

[0103] When the needle core 11 punctures the tissue, part of the tissue will be placed in the sampling groove 112. The distal end of the needle tube 10 passes over the sampling groove 112 and cuts the tissue so that the part of the tissue remains in the sampling groove 112. Single sampling can meet the inspection needs and the operation is simple.

[0104] The distal ends of the needle core 11 and the needle tube 10 converge to form a sharp portion 13, so that the needle core 11 can puncture the tissue and the needle tube 10 can cut the tissue. The needle core 11 is made of nickel-titanium alloy, and the needle tube 10 is a bundled tube needle tube 10, so as to have good bending performance.

[0105] In this embodiment, if Fig.10 As shown, the housing 20 includes an upper cover 21 and a lower cover 22 that are buckled together. The upper cover 21 and the lower cover 22 form an installation chamber 23, and the installation chamber 23 is used to accommodate components such as the slider 30.

[0106] The lower cover 22 is roughly a box structure, the top side and the distal side of the lower cover 22 are open, and the proximal side of the lower cover 22 is provided with a through hole 224 for the needle core 11 to pass through; the upper cover 21 is roughly an L-shaped structure, and the upper cover 21 seals the top side and the distal side of the lower cover 22.

[0107] A plurality of first clamping blocks 212 are disposed on two opposite sides of the upper cover 21 , and a first clamping groove 225 engaged with the corresponding first clamping blocks 212 is disposed on the inner side wall of the lower cover 22 , so as to fix the lower cover 22 and the upper cover 21 to each other.

[0108] Two opposite sides of the lower cover 22 are fixed with gripping handles 221 for the operator to grip the housing 20. The gripping handles 221 are protruding from the outer side of the lower cover 22, and the outer surface of the gripping handles 221 is provided with anti-slip grooves.

[0109] In this embodiment, if Figure 11 to Figure 12 As shown, an avoidance slot 222 is provided on the bottom side of the lower cover 22 , the push rod 50 extends through the bottom side of the lower cover 22 , and the transmission part 52 of the push rod 50 extends into the installation chamber 23 through the avoidance slot 222 .

[0110] The push rod 50 has guide grooves on two opposite sides, and the guide grooves are combined with the inner wall of the avoidance slot 222 to limit the movement path of the push rod 50. The push rod 50 has two oppositely arranged fixing blocks 54, which are located on both sides of the slot wall of the avoidance slot 222 and form the guide groove.

[0111] The housing 20 further includes a cover plate 24 , which is buckled onto the bottom side of the lower cover 22 and can shield the push rod 50 and the avoidance slide groove 222 and other components.

[0112] The cover plate 24 is a plate-shaped structure, wherein a plurality of second clamping blocks 241 are disposed on two opposite sides of the cover plate 24 , and the inner side wall of the lower cover 22 is provided with second clamping grooves 226 that are engaged with the corresponding second clamping blocks 241 , so as to fix the lower cover 22 and the cover plate 24 to each other.

[0113] In this embodiment, the slider 30 is directly or indirectly provided with a gear mark 33 , and the housing 20 is provided with a window 211 corresponding to the position of the gear mark 33 . The window 211 is provided on the upper cover 21 .

[0114] The gear mark 33 is in the shape of a plate; the gear mark 33 is located between the slider 30 and the upper cover 21, and a plurality of marks are arranged on the side of the gear mark 33 facing the upper cover 21, and the plurality of marks are arranged in sequence along the sliding direction of the slider 30. For example, from the distal end to the proximal end of the gear mark 33, the plurality of marks are marked 1, 2, 3, and 4 in sequence, representing the puncture depths of the needle core 11 of 10 mm, 20 mm, 30 mm, and 40 mm, respectively.

[0115] The slider 30 has a relative top side and a bottom side, the needle tube 10 and the gear mark 33 are both located on the top side of the slider 30, and the gear teeth 31 are arranged in sequence on the bottom side of the slider 30 from the proximal end to the distal end; each gear tooth 31 has a guiding tooth surface 311 facing the proximal end and a locking tooth surface 312 facing the distal end, the limiting tooth 40 can pass over the guiding tooth surface 311, and the limiting tooth 40 is limited by the locking tooth surface 312 at the corresponding position.

[0116] The bottom surface of the slider 30 is provided with a slot 32 near the distal end, and the transmission part 52 of the push rod 50 is combined with the slot 32 to act on the slot wall of the slot 32 facing the distal end. The transmission part 52 of the push rod 50 is hook-shaped so that the transmission part 52 is combined with the slot 32.

[0117] The gear latch 31 is disposed in the slot 32, and the bottom side of the gear latch 31 is substantially flush with the bottom side of the slider 30. The gear latch 31 and the slider 30 are integrally disposed.

[0118] like Figure 13 to Figure 14 As shown, the slider 30 is fixed to the gear mark 33 by snapping. The gear mark 33 has a snapping block 331 at the bottom, and the slider 30 has a snapping groove 36 that matches the snapping block 331 at the bottom.

[0119] In this embodiment, the elastic member 34 is a compression spring, which abuts between the housing 20 and the proximal end side of the slider 30 .

[0120] The gear mark 33 and the inner wall of the lower cover 22 are both provided with positioning posts, and the ends of the elastic member 34 are sleeved on the corresponding positioning posts. The elastic member 34 is sleeved on the outer side of the needle core 11 .

[0121] In this embodiment, the limiting tooth 40 is located on the lower cover 22 , and the limiting tooth 40 and the lower cover 22 are an integral structure, so as to enhance the connection strength between the limiting tooth 40 and the lower cover 22 , and at the same time reduce the difficulty of the processing technology of the limiting tooth 40 and the lower cover 22 .

[0122] The limiting teeth 40 are configured to switch between the following states:

[0123] The locking position abuts against the corresponding gear latch 31 to keep the slider 30 at the current gear position;

[0124] In the unlocking position, the unlocking portion 53 of the push rod 50 is separated from the gear latch 31 by its own deformation, allowing the slider 30 to drive the needle tube 10 to move toward the distal end under the driving of the elastic member 34.

[0125] When the limiting tooth 40 is not subjected to external force, the limiting tooth 40 remains in the locked position; when the limiting tooth 40 is subjected to force to switch from the locked position to the released position, the limiting tooth 40 moves toward the bottom side of the lower cover 22 until the limiting tooth 40 is separated from the corresponding gear latch tooth 31.

[0126] like Fig.11 As shown, the unlocking portion 53 of the push rod 50 is located at the distal end side of the transmission portion 52 , and the proximal end side of the limiting tooth 40 has a guiding inclined surface 41 that matches the unlocking portion 53 .

[0127] The unlocking portion 53 is substantially block-shaped, and is integrally provided with the transmission portion 52 and the driving portion to facilitate processing of the push rod 50 .

[0128] The limiting tooth 40 includes a cantilever 42 and a tooth tip 43. The cantilever 42 starts from the groove wall of the avoidance groove 222 of the lower cover 22 and extends to the proximal end of the lower cover 22. The cantilever 42 can be deformed; the tooth tip 43 is at the end of the cantilever 42, and the tooth tip 43 can be against the gear locking tooth 31.

[0129] There are two tooth tips 43, which are located at two opposite sides of the end of the cantilever 42 and respectively cooperate with the same pair of gear teeth 31. The end surface of the end of the cantilever 42 is inclined to form a guiding slope 41, which is located between the two tooth tips 43.

[0130] In this embodiment, if Figure 15 to Figure 16 As shown, a limit block 60 is movably installed on the proximal side of the housing 20 , and the limit block 60 has a first position that interferes with the push rod 50 and a second position that avoids the push rod 50 .

[0131] There is no strict restriction on the shape and specific structure of the limit block 60. When the limit block 60 is in the first position, the operating part 51 of the push rod 50 can abut against the side of the limit block 60 facing away from the shell 20. At this time, the limit block 60 is between the operating part 51 and the shell 20; when the limit block 60 is in the second position, the operating part 51 of the push rod 50 can directly abut against the distal side of the shell 20.

[0132] The limit block 60 is mainly used to limit the unlocking portion 53 of the push rod 50 from directly abutting against the limit tooth 40 during the puncture process. Instead, after observing the puncture position of the needle core 11, the limit block 60 is moved to the second position, and the unlocking portion 53 of the push rod 50 is abutted against the limit tooth 40, driving the limit tooth 40 into the unlocking position.

[0133] When the push rod 50 moves toward the distal end, it has a third position and a fourth position. In the third position, the operating part 51 abuts against the limit block 60 in the first position, and the limit tooth 40 is in the locking position. In the fourth position, the operating part 51 passes over the limit block 60 in the second position and abuts against the proximal side of the shell 20, and the unlocking part 53 abuts against the limit tooth 40, driving the limit tooth 40 to enter the unlocking position.

[0134] The proximal side of the housing 20 is provided with a slide groove 61 for the limit block 60 to slide, so as to limit the movement path of the limit block 60. The movement path of the limit block 60 is perpendicular to the movement path of the push rod 50.

[0135] The distal end of the lower cover 22 has two oppositely arranged fixing plates 64, and a slide groove 61 is formed between the fixing plates 64. When the limit block 60 is placed in the slide groove 61, the opposite side walls of the limit block 60 are respectively in contact with or gap-fitted with the corresponding fixing plates 64.

[0136] The limit block 60 has a locking groove 62 . A locking piece 63 matching the locking groove 62 is disposed on the proximal side of the housing 20 to limit the limit block 60 and prevent the limit block 60 from being separated from the sliding groove 61 .

[0137] The locking groove 62 is a through groove that passes through the limit block 60; the locking groove 62 is arranged in a strip shape, and has a length direction and a width direction perpendicular to the length, and the length direction is arranged parallel to the movement direction of the limit block 60; the two side walls of the locking groove 62 in the length direction can respectively abut against the locking piece 63 to limit the extreme position of the limit block 60.

[0138] The locking member 63 includes a column 631 and a stopper 632. One end of the column 631 is connected to the proximal side of the housing 20, and the other end passes through the locking slot 62. The stopper 632 is fixed to the end of the column 631 passing through the locking slot 62 and is limited by the locking slot 62. For example, the locking member 63 is a fastening screw, and the housing 20 is provided with a screw groove threadedly connected to the fastening screw.

[0139] In this embodiment, the semi-automatic biopsy needle 100 further includes a length adjustment tube 70 connected to the distal end of the housing 20 , and the needle tube 10 and the needle core 11 further extend toward the distal end through the interior of the length adjustment tube 70 .

[0140] The length adjustment tube 70 has an axial direction in space, and the axial length of the length adjustment tube 70 is adjustable, that is, the distance between the axial ends of the length adjustment tube 70 can be adjusted to adjust the length of the needle core 11 and the needle tube 10 extending out of the distal end of the semi-automatic biopsy needle 100.

[0141] The length adjustment tube 70 has a passage running through the length adjustment tube 70 axially, one end of the passage is connected to the inside of the shell 20 , and the other end is open, and the needle tube 10 and the needle core 11 pass through the passage.

[0142] The length adjustment tube 70 includes a first sleeve 71, a second sleeve 72 and a fastener 73. One end of the first sleeve 71 is connected to the shell 20, and the other end extends back to the shell 20. The second sleeve 72 is slidably connected to the first sleeve 71. The fastener 73 acts on the first sleeve 71 and the second sleeve 72 to limit the relative positions of the two.

[0143] The cross section of the first sleeve 71 is not strictly limited (e.g., the ring shape in the figure). The first sleeve 71 has an axial direction in space, and the first sleeve 71 has a first passage for the needle tube 10 and the needle core 11 to pass through. The two ends of the first passage are respectively open at the two axial ends of the first sleeve 71 and communicate with the interior of the housing 20.

[0144] One axial end of the first sleeve 71 is threadedly connected to the housing 20. Specifically, a threaded hole is provided on the distal end side of the upper cover 21, and a proximal side wall of the first sleeve 71 has an external thread engaged with the threaded hole.

[0145] The cross section of the second sleeve 72 is not strictly limited (for example, the ring shape in the figure). The second sleeve 72 has an axial direction in space, which is arranged to coincide with the axial direction of the first sleeve 71; the second sleeve 72 has a second passage for the needle tube 10 and the needle core 11 to pass through, and the two ends of the second passage are respectively open at the two axial ends of the second sleeve 72 and are connected to the passage of the first sleeve 71.

[0146] A limiting step 711 is provided on the outer wall of one end of the first sleeve 71 inside the second sleeve 72 , and an anti-dropping screw 74 matching with the limiting step 711 is penetrated through the side wall of the second sleeve 72 .

[0147] The step surface of the limiting step 711 faces the proximal end of the first sleeve 71 , and the anti-dropping screw 74 abuts against the step surface of the limiting step 711 , thereby preventing the second sleeve 72 from being pulled off from the first sleeve 71 .

[0148] The outer wall of the second sleeve 72 is concave, and the distal end of the concave is a limiting step 711. A threaded hole is provided on the side wall of the second sleeve 72, and the anti-slip screw 74 is threadedly connected to the threaded hole and extends into the concave, and is clearance-matched with the bottom wall of the concave.

[0149] The fastener 73 is a fastening screw. A first mounting hole is formed on the side wall of the second sleeve 72 . The fastener 73 is threadedly connected to the first mounting hole. One end of the fastening screw is in contact with the outer wall of the first sleeve 71 .

[0150] In this embodiment, the semi-automatic biopsy needle 100 further includes a connecting assembly 80 connected to the distal end of the second sleeve 72 , and the connecting assembly 80 has an adapting structure corresponding to the channel opening 90 of the endoscope.

[0151] The main function of the connecting component 80 is to fix the endoscope channel opening 90 to the distal end of the second sleeve 72. The connecting component 80 has a connecting channel inside, which can connect the second sleeve 72 and the endoscope channel opening 90 so that the needle core 11 and the needle tube 10 can penetrate into the endoscope channel opening.

[0152] like Figures 17 to 20 As shown, the connection assembly 80 includes a connector 81 and a connector 82 . The connector 81 is movably sleeved on the distal end of the second sleeve 72 . The connector 82 is threadedly connected to the connector 81 and can be snap-fitted with the endoscope channel opening 90 .

[0153] The outer wall of the second sleeve 72 has a boss 84, and a plug 83 is screwed to the distal end of the second sleeve 72. The boss 84 and the plug 83 are respectively located at the axial ends of the joint 81 to axially position the joint 81. When the connector 81 is fixed to the distal end of the second sleeve 72, the joint 81 is sleeved on the second sleeve 72, and by tightening the plug 83, the plug 83 and the boss 84 press the joint 81 to fix the joint 81.

[0154] The joint 81 is roughly cylindrical (e.g., a cylinder in the figure). The joint 81 roughly has an axis in space, and includes a first part 811 and a second part 812 arranged along its own axis, and the first part 811 and the second part 812 are both cylindrical; the radial dimension of the second part 812 is larger than the radial dimension of the first part 811, and there is a certain radial gap between the second part 812 and the second sleeve 72; the plug 83 is placed in the radial gap and abuts against the distal end of the first part 811, and the boss 84 abuts against the proximal end of the first part 811. Among them, the connecting member 82 has a screw column 823 screwed to the second part 812.

[0155] The plug 83 has a through hole 831 for the needle tube 10 to pass through, and there is a gap or a close fit between the side wall of the needle tube 10 and the inner wall of the through hole 831.

[0156] The plug 83 is generally disc-shaped. The outer periphery of the plug 83 protrudes from the side wall of the second sleeve 72 and extends toward the proximal end so as to abut against the distal side of the first portion 811; the proximal side of the plug 83 has a threaded section 832 and the distal side has an extension section 833; the threaded section 832 extends into the second sleeve 72 and is threadedly connected with the second sleeve 72; the through hole 831 extends from the threaded section 832 to the extension section 833, and can support the needle tube 10 and the needle core 11.

[0157] The endoscope channel opening 91 has an annular groove 92 , and the connecting piece 82 has an opening-disposed snap-fit ​​groove 821 , the groove wall of which is coupled to the annular groove 92 , so that the endoscope channel opening 90 can be connected to the second sleeve 72 .

[0158] The connecting member 82 also has a supporting groove 822 for supporting the endoscope channel opening 91 ; the supporting groove 822 is open, and the inner wall of the supporting groove 822 is in contact with the side wall of the endoscope channel opening 91 .

[0159] The engaging groove 821 and the supporting groove 822 are both U-shaped, and the U-shaped opening facilitates the entry and exit of the endoscope channel 91 .

[0160] like Figures 1 to 20 As shown, the present application also provides a puncture system, including the semi-automatic biopsy needle 100 and an endoscopic device in the above embodiments;

[0161] The endoscope device includes at least one working channel for the needle core 11 and the needle tube 10 to extend. An endoscope channel opening 91 connected to the working channel is provided at the proximal end of the endoscope device, and the semi-automatic biopsy needle 100 is docked to the endoscope channel opening 90 .

[0162] The endoscope device further comprises a tube body 90, and an endoscope channel opening 91 is arranged on the side wall of the tube body 90. The tube body 90 has a plurality of working channels for the pipelines to pass through, wherein one working channel is for the needle core 11 and the needle tube 10 to extend and is connected to the endoscope channel opening 91.

[0163] The following describes the operating steps of the puncture system:

[0164] Pull the push rod 50 to the corresponding gear position, such as the mark "4" on the gear position mark 33; when the push rod 50 is pulled, the push rod 50 drives the needle core 11, the slider 30 and the needle tube 10 to move toward the proximal end as a whole, and the slider 30 compresses the elastic member 34, and when the limit tooth 40 cooperates with the corresponding gear position latch tooth 31, stop pulling the push rod 50;

[0165] The length adjustment tube 70 reaches the limit position of the length, and then the endoscope channel port 91 is fixed to the distal end of the second sleeve 72;

[0166] Observe the position of the needle tube 10 through an endoscope and adjust the length of the adjustment tube 70 to make the needle tube 10 meet the requirements;

[0167] Adjust the limit block 60 to the first position;

[0168] Push the push rod 50 to make the needle core 11 puncture into the target tissue position, and observe whether the puncture is in place. If it is in place, adjust the limit block 60 to the second position, and push the push rod 50 again. The unlocking portion 53 of the push rod 50 drives the limit tooth 40 to separate from the gear locking tooth 31 under the action of the guide slope 41. Under the action of the elastic member 34, the slider 30 rebounds, and the needle tube 10 cuts the tissue to complete the cutting action;

[0169] Separate the semi-automatic biopsy needle 100 from the endoscope channel port 91;

[0170] The push rod 50 is pulled to the target position again, the limit block 60 is adjusted to the first position, and the push rod 50 is pushed forward again to take out the tissue and complete the sampling.

[0171] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. When the technical features in different embodiments are embodied in the same figure, it can be regarded that the figure also discloses the combination examples of the various embodiments involved.

[0172] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. A semi-automatic biopsy needle for endoscopy, having a distal end and a proximal end opposite to each other, the semi-automatic biopsy needle comprising a housing and a needle core and a needle tube nested in sequence from the inside to the outside, the proximal end of the needle core serving as a driving end and extending out of the needle tube, characterized in that: The semi-automatic biopsy needle also includes: A slider is slidably mounted in the housing, the proximal end of the needle tube is fixed to the slider, and a plurality of gear teeth are arranged on the slider; An elastic member installed in the housing to drive the slider to move toward the distal end; A limiting tooth, movably installed in the housing and cooperating with the gear locking tooth to limit the movement of the slider toward the distal end; A push rod is fixed to the driving end of the needle core, and the push rod at least includes an operating portion located outside the housing, a transmission portion that is unidirectionally linked with the slider and only drives the slider to move toward the proximal end, and an unlocking portion that drives the limit tooth to separate from the gear locking tooth; The semi-automatic biopsy needle further comprises a length adjustment tube connected to the distal end of the housing, and the needle tube and the needle core further extend toward the distal end through the interior of the length adjustment tube; The semi-automatic biopsy needle also includes a connecting assembly connected to the distal end of the length adjustment tube, the connecting assembly having an adapting structure corresponding to the endoscope channel opening, and the connecting assembly includes: A joint, movably sleeved on the distal end of the length adjustment tube; A connector, threadedly connected to the connector and capable of being snap-fitted to the endoscope channel port; The outer wall of the length adjustment tube has a boss, the distal end of the length adjustment tube is screwed with a plug, the plug has a through hole for the needle tube to pass through, the boss and the plug are respectively located at two axial ends of the connector to position the connector axially; The shell comprises an upper cover and a lower cover which are buckled with each other, an avoidance slide groove is provided on the bottom side of the lower cover, and guide grooves are provided on two opposite sides of the push rod, and the guide grooves are combined with the inner wall of the avoidance slide groove to limit the movement path of the push rod.

2. The semi-automatic biopsy needle for endoscopy according to claim 1, characterized in that: The slider is directly or indirectly provided with a gear position mark, and the housing is provided with a window corresponding to the position of the gear position mark.

3. The semi-automatic biopsy needle for endoscopy according to claim 2, characterized in that: The slider has a top side and a bottom side opposite to each other, the needle tube and the gear mark are both located on the top side of the slider, and the gear teeth are arranged in sequence from the proximal end to the distal end on the bottom side of the slider; Each gear-position latching tooth has a guiding tooth surface facing the proximal end and a locking tooth surface facing the distal end, and the limiting tooth is limited by the locking tooth surface corresponding to the position.

4. The semi-automatic biopsy needle for endoscopy according to claim 1, characterized in that: The bottom surface of the sliding block is provided with a slot at a position adjacent to the distal end, and the transmission part of the push rod is combined with the slot to act on the slot wall facing the distal end.

5. The semi-automatic biopsy needle for endoscopy according to claim 2, characterized in that: The upper cover and the lower cover form an installation chamber for accommodating the slider, the viewing window is opened in the upper cover, and the limiting teeth are located in the lower cover.

6. The semi-automatic biopsy needle for endoscopic use according to claim 5, characterized in that: Two opposite sides of the lower cover are fixed with holding handles.

7. The semi-automatic biopsy needle for endoscopic use according to claim 5, characterized in that: The push rod extends through the bottom side of the lower cover, an avoidance slide groove is provided on the bottom side of the lower cover, and the transmission part of the push rod extends into the installation chamber through the avoidance slide groove.

8. The semi-automatic biopsy needle for endoscopic use according to claim 7, characterized in that: The shell also includes a cover plate, which is buckled on the bottom side of the lower cover.

9. The semi-automatic biopsy needle for endoscopic use according to claim 5, characterized in that: The limiting teeth are an integral structure with the lower cover, and the limiting teeth are configured to switch between the following states: The locking position abuts against the corresponding gear teeth to keep the slider in the current gear position; The unlocking position is a position in which the unlocking portion of the push rod is separated from the gear teeth by its own deformation, allowing the slider to drive the needle tube to move toward the distal end under the drive of the elastic member.

10. The semi-automatic biopsy needle for endoscopic use according to claim 9, characterized in that: The elastic member is a compression spring, which abuts between the housing and the proximal end side of the slider.

11. The semi-automatic biopsy needle for endoscopic use according to claim 1, characterized in that: The transmission part of the push rod is hook-shaped, and the unlocking part is located at the distal end side of the transmission part.

12. The semi-automatic biopsy needle for endoscopic use according to claim 11, characterized in that: The proximal end side of the limiting tooth has a guiding inclined surface matched with the unlocking portion.

13. The semi-automatic biopsy needle for endoscopic use according to claim 1, characterized in that: A limit block is movably installed on the proximal side of the shell, and the limit block has a first position that interferes with the push rod and a second position that avoids the push rod.

14. The semi-automatic biopsy needle for endoscopic use according to claim 13, characterized in that: When the push rod moves toward the distal end, it has the following features: In the third position, the operating portion abuts against the limit block in the first position, and the limit tooth is in the locking position; In the fourth position, the operating portion passes over the limiting block in the second position until it abuts against the proximal end side of the shell, and the unlocking portion abuts against the limiting tooth, driving the limiting tooth to enter the unlocking position.

15. The semi-automatic biopsy needle for endoscopic use according to claim 13, characterized in that: A sliding groove for the limit block to slide is arranged on the proximal side of the shell, so as to limit the movement path of the limit block.

16. The semi-automatic biopsy needle for endoscopic use according to claim 15, characterized in that: The limit block has a locking groove, and the proximal side of the shell is provided with a locking piece matched with the locking groove for limiting the limit block.

17. The semi-automatic biopsy needle for endoscopic use according to claim 16, characterized in that: The locking member comprises: A column, one end of which is connected to the proximal side of the housing and the other end of which passes through the locking slot; The limiting head is fixed to one end of the column passing through the locking slot and is limited by the locking slot.

18. The semi-automatic biopsy needle for endoscopic use according to claim 16, characterized in that: The locking member is a fastening screw, and the housing is provided with a screw groove threadably connected to the fastening screw.

19. The semi-automatic biopsy needle for endoscopic use according to claim 1, characterized in that: The length adjustment tube comprises: A first sleeve, one end of which is connected to the housing; A second sleeve, slidably sleeved with the first sleeve; The fastener acts on the first sleeve and the second sleeve to limit the relative position of the two.

20. The semi-automatic biopsy needle for endoscopic use according to claim 19, characterized in that: The proximal end of the first sleeve is threadedly connected to the housing, and the second sleeve is sleeved on the outer circumference of the first sleeve.

21. The semi-automatic endoscopic biopsy needle according to claim 19, characterized in that: A first mounting hole is formed on the side wall of the second sleeve, and the fastener is a fastening screw threadedly connected to the first mounting hole, and one end of the fastening screw is in abutment with the outer wall of the first sleeve.

22. The semi-automatic biopsy needle for endoscopic use according to claim 19, characterized in that: A limiting step is provided on the outer wall of one end of the first sleeve inside the second sleeve, and an anti-dropping screw matching the limiting step is penetrated through the side wall of the second sleeve.

23. The semi-automatic biopsy needle for endoscopic use according to claim 1, characterized in that: The distal side wall of the needle core has a sampling groove, and the distal end of the needle tube can pass over and open the sampling groove; The distal ends of the needle core and the needle tube converge to form a sharp point.

24. A puncture system, characterized in that A semi-automatic biopsy needle for endoscopy and an endoscope device comprising any one of claims 1 to 23; The endoscope device comprises at least one working channel for the needle core and the needle tube to extend, an endoscope channel opening communicating with the working channel is provided at the proximal end of the endoscope device, and the semi-automatic biopsy needle is connected to the endoscope channel opening.

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