CN218075071U - Semi-automatic biopsy needle and puncture system for endoscope - Google Patents

Abstract

The application discloses a semi-automatic biopsy needle and a puncture system for a transcranial endoscope, wherein the semi-automatic biopsy needle comprises a shell, a needle core and a needle tube which are sequentially nested from inside to outside, the near end of the needle core is used as a driving end and extends out of the needle tube, the semi-automatic biopsy needle further comprises a sliding block, an elastic part, a limiting tooth and a push rod, the sliding block is slidably arranged in the shell, the near end of the needle tube is fixed on the sliding block, and a plurality of gear clamping teeth are distributed on the sliding block; the elastic piece is arranged in the shell and drives the sliding block to move towards the far end; the limiting teeth are movably arranged in the shell and matched with the gear clamping teeth to limit the slide block to move towards the far end; the push rod is fixed with the driving end of the needle core, and the push rod at least comprises an operating part positioned outside the shell, a transmission part which is in one-way linkage with the slide block and only drives the slide block to move towards the near end, and an unlocking part which drives the limit teeth to be separated from the gear latch. Compared with the prior art, the arrangement of the gear latches can adjust the puncture depth of the stylet so as to control the depth of the stylet puncture tissue.

Description

Semi-automatic biopsy needle and puncture system for endoscope

Technical Field

The application relates to the field of medical equipment, in particular to a semi-automatic biopsy needle and a puncture system for an endoscope.

Background

Lung cancer has become one of the most rapidly growing malignant tumors that threaten human health and life, and the diagnosis of lung cancer depends on clinical symptoms, physical signs, imaging examination, pathological examination, and the like. The most effective way is to perform the biopsy by histopathological examination, in which bronchoscopic biopsy is widely used.

The biopsy instrument that acquires comparatively commonly used of tissue specimen is biopsy forceps and biopsy needle under current bronchoscope, wherein mainly be biopsy forceps to the pathological change biopsy that the lumen is internal to produce, but the biopsy specimen who acquires is less, and there is the sample incomplete and by extruded shortcoming, and need many times to clamp the sample originally and can accomplish an effectual biopsy, present biopsy instrument that closes on pathological change to the lumen outside or the lumen is mainly for the pjncture needle, need the art person to connect the negative pressure at the distal end of pjncture needle, and make the pjncture needle remove in the focus in order to realize the cutting sample through manual, but the sample rate is low, the operation is complicated, the shortcoming that the tissue integrality destroys also exists in the repeated cutting. Therefore, the invention aims to develop a flexible semi-automatic biopsy needle used under an endoscope, realize semi-automatic cutting and sampling of target lesions (such as peripheral pulmonary nodules or masses, intrathoracic enlarged lymph nodes and the like) under the endoscope, and realize the purpose of obtaining a large and complete sample on the basis of convenient and safe use.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the application discloses semi-automatic biopsy needle is used through endoscope has relative distal end and near-end, semi-automatic biopsy needle includes casing and by interior and outer nested nook closing member and needle tubing in proper order, the near-end of nook closing member just extends as the drive end the needle tubing, semi-automatic biopsy needle still includes:

the sliding block is slidably arranged in the shell, the near end of the needle tube is fixed on the sliding block, and a plurality of gear clamping teeth are distributed on the sliding block;

the elastic piece is arranged in the shell and drives the sliding block to move towards the far end;

the limiting teeth are movably arranged in the shell and matched with the gear clamping teeth to limit the sliding block to move towards the far end;

the push rod is fixed with the driving end of the needle core and at least comprises an operating part arranged outside the shell, a transmission part which is in one-way linkage with the sliding block and only drives the sliding block to move towards the near end, and an unlocking part which drives the limiting teeth and the gear clamping teeth to separate.

Several alternatives are provided below, but not as an additional limitation to the above general solution, but merely as a further addition or preference, each alternative being combinable individually for the above general solution or among several alternatives without technical or logical contradictions.

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

Optionally, the slider has opposite top and bottom sides, the needle tube and the gear position identifier are both located on the top side of the slider, and the gear position latches are sequentially arranged on the bottom side of the slider from the proximal end to the distal end;

each gear latch is provided with a guide tooth surface facing to the near end and a locking tooth surface facing to the far end, and the limiting teeth are abutted with the locking tooth surfaces corresponding to the positions for limiting;

the bottom surface of the sliding block is provided with a clamping groove at a position close to the far end side, and the transmission part of the push rod is combined with the clamping groove and acts on the groove wall of the clamping groove facing to the far end side.

Optionally, the housing includes an upper cover and a lower cover that are fastened to each other, the upper cover and the lower cover enclose an installation chamber for accommodating the slider, the window is opened in the upper cover, and the limiting teeth are located on the lower cover.

Optionally, two opposite sides of the lower cover are fixed with holding handles.

Optionally, the push rod extends through the bottom side of the lower cover, an avoiding chute is formed in the bottom side of the lower cover, and a transmission part of the push rod extends into the installation chamber through the avoiding chute.

Optionally, the housing further includes a cover plate fastened to the bottom side of the lower cover.

Optionally, the limit tooth and the lower cover are of an integral structure, and the limit tooth is configured to be switchable in the following states:

the lock position is abutted against the corresponding gear latch, and the sliding block is kept at the current gear;

the unlocking position is separated from the gear latch through self deformation under the action of the unlocking part of the push rod, and the slide block is allowed to drive the needle tube to move towards the far end under the driving of the elastic piece.

Optionally, the elastic member is a compression spring, and is abutted between the housing and the proximal end side of the slider.

Optionally, the transmission part of the push rod is hook-shaped, and the unlocking part is located on the distal end side of the transmission part;

the proximal end side of the limit tooth is provided with a guide inclined surface matched with the unlocking part.

Optionally, a limit block is movably mounted at a proximal end side of the housing, and the limit block has a first position interfering with the push rod and a second position avoiding the push rod;

the push rod has the following components in the process of moving towards the far end:

the operating part is abutted against the limiting block at the first position, and the limiting teeth are positioned at the locking position;

and in the fourth position, the operating part passes over the limiting block in the second position until abutting against the proximal end side of the shell, and the unlocking part abuts against the limiting teeth to drive the limiting teeth to enter the unlocking position.

Optionally, a sliding groove for allowing the limiting block to slide is arranged on the proximal end side of the casing to limit the movement path of the limiting block.

Optionally, the limiting block has a locking groove, and a locking piece matched with the locking groove is arranged on the proximal side of the casing to limit the limiting block.

Optionally, the locking element comprises:

one end of the column body is connected with the near end side of the shell, and the other end of the column body penetrates through the locking groove;

the limiting head is fixed at one end, penetrating out of the locking groove, of the cylinder and limited by the locking groove.

Optionally, the locking piece is a fastening screw, and the housing is provided with a screw groove in threaded connection with the fastening screw.

Optionally, the semi-automatic biopsy needle further comprises a length adjustment tube in abutting communication with the distal end of the housing, the needle cannula and the needle core extending further distally through an interior of the length adjustment tube.

Optionally, the length adjustment tube includes:

one end of the first sleeve is connected with the shell;

the second sleeve is sleeved with the first sleeve in a sliding mode;

and the fastener acts on the first sleeve and the second sleeve to limit the relative positions of the first sleeve and the second sleeve.

Optionally, the proximal end of the first sleeve is in threaded connection with the housing, and the second sleeve is sleeved on the outer periphery of the first sleeve.

Optionally, a first mounting hole is formed in the side wall of the second sleeve, the fastener is a fastening screw in threaded connection with the first mounting hole, and one end of the fastening screw abuts against the outer wall of the first sleeve.

Optionally, the outer wall of one end of the first sleeve, which is located inside the second sleeve, is provided with a limiting step, and the side wall of the second sleeve is provided with an anti-falling screw which is matched with the limiting step in a penetrating manner.

Optionally, the semi-automatic biopsy needle further comprises a coupling assembly coupled to the distal end of the second cannula, the coupling assembly having an adapter structure corresponding to the opening of the endoscope channel.

Optionally, the connection assembly includes:

the joint is movably sleeved at the far end of the second sleeve;

and the connecting piece is in threaded connection with the connector and can be clamped with the endoscope passage port.

Optionally, a boss is arranged on the outer side wall of the second sleeve, a plug is screwed to the far end of the second sleeve, and the boss and the plug are respectively located at two axial ends of the joint to axially position the joint.

Optionally, the plug is provided with a through hole for the needle tube to pass through.

Optionally, the distal sidewall of the core has a sampling slot, and the distal end of the needle cannula is capable of passing over and opening the sampling slot;

the needle core and the distal end of the needle tube are respectively converged and furled to form a sharp part.

The present application further provides a lancing system comprising a semi-automatic biopsy needle as described herein and an endoscopic device;

the endoscope device comprises at least one working channel for the needle core and the needle tube to extend, an endoscope channel port communicated with the working channel is arranged at the proximal end part of the endoscope device, and the semi-automatic biopsy needle is connected to the endoscope channel port.

Through semi-automatic biopsy needle of scope and puncture system in this application, control the depth of puncture of nook closing member, the purpose that the single sample can satisfy the requirement can be realized to the sample groove on the nook closing member, reduces the operation duration from this, alleviates art person working strength and the sample degree of difficulty.

Drawings

FIG. 1 is a schematic structural view of a lancing system in one embodiment provided herein;

FIG. 2 is a schematic view of the lancing system of FIG. 1 in an exploded configuration;

FIG. 3 is a cross-sectional view of the semi-automatic biopsy needle of FIG. 1;

FIG. 4 is a partial view of the semi-automatic biopsy needle of FIG. 3;

FIG. 5 is a schematic view of the puncture state of the semi-automatic biopsy needle shown in FIG. 4;

FIG. 6 is a schematic view of the puncture state of the semi-automatic biopsy needle shown in FIG. 4;

FIG. 7 is a partial cross-sectional view of the semi-automatic biopsy needle of FIG. 1;

FIG. 8 is a schematic view of the needle cannula and hub of FIG. 1;

FIG. 9 is a schematic view of the needle cannula and hub of FIG. 1;

FIG. 10 is an exploded view of the housing of FIG. 1;

FIG. 11 is a schematic structural view of the housing and the push rod of FIG. 3;

FIG. 12 is an exploded view of the housing and the push rod of FIG. 11;

FIG. 13 is a schematic structural view of the slider and the gear indicator of FIG. 3;

FIG. 14 is an exploded view of the slide and gear indicator of FIG. 13;

FIG. 15 is a schematic structural view of the stop block of FIG. 1 in a first position;

FIG. 16 is a schematic structural view of the stop block of FIG. 1 in a second position;

FIG. 17 is a schematic view of the structure of the joint of FIG. 2;

FIG. 18 is a schematic view of the plug of FIG. 2;

FIG. 19 is a schematic view of the connector of FIG. 2;

fig. 20 is a schematic view of the structure of the endoscope passage port of fig. 2.

The reference numerals in the figures are illustrated as follows:

100. a semi-automatic biopsy needle; 101. a distal end; 102. a proximal end;

10. a needle tube; 11. a needle core; 111. a driving end; 112. a sampling groove; 13. a sharp portion;

20. a housing; 21. an upper cover; 211. a window; 212. a first clamping block; 22. a lower cover; 221. a grip handle; 222. avoiding the chute; 223. a guide chute; 224. a via hole; 225. a first card slot; 226. a second card slot; 23. an installation chamber; 24. a cover plate; 241. a second fixture block;

30. a slider; 31. gear clamping teeth; 311. a guide tooth surface; 312. a locking tooth surface; 32. a card slot; 33. identifying a gear; 331. buckling blocks; 34. an elastic member; 35. a guide portion; 36. buckling the groove;

40. limiting teeth; 41. a guide ramp; 42. a cantilever; 43. a tooth tip;

50. a push rod; 51. an operation unit; 52. a transmission section; 53. an unlocking portion; 54. a fixed block;

60. a limiting block; 61. a chute; 62. locking the groove; 63. a locking member; 631. a cylinder; 632. a limiting head; 64. a fixing plate;

70. a length adjusting tube; 71. a first sleeve; 711. a limiting step; 72. a second sleeve; 73. a fastener; 74. an anti-drop screw;

80. a connection assembly; 81. a joint; 811. a first portion; 812. a second portion; 82. a connecting member; 821. a clamping groove; 822. a bearing groove; 823. a screw connection column; 83. a plug; 831. a through hole; 832. a screwing section; 833. an extension section; 84. a boss;

90. a pipe body; 91. an endoscope channel port; 92. an annular groove.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 7, the present application discloses a semi-automatic endoscopic biopsy needle 100 having a distal end 101 and a proximal end 102 opposite to each other, the semi-automatic biopsy needle 100 including a housing 20, a needle core 11 and a needle tube 10 nested from inside to outside, the proximal end of the needle core 11 serving as a driving end 111 and extending out of the needle tube 10, the semi-automatic biopsy needle 100 further including:

the sliding block 30 is slidably arranged in the shell 20, the near end of the needle tube 10 is fixed on the sliding block 30, and a plurality of gear latches 31 are distributed on the sliding block 30;

a resilient member 34 mounted within the housing 20 for urging the slider 30 distally;

the limiting teeth 40 are movably arranged in the shell 20 and are matched with the gear clamping teeth 31 to limit the slide block 30 to move towards the far end;

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 portion 51 located outside the housing 20, a transmission portion 52 linked to the slider 30 in a one-way manner to drive the slider 30 to move proximally, and an unlocking portion 53 to drive the limit tooth 40 to separate from the shift latch 31.

In this embodiment and the following embodiments, the "distal end 101" refers to the end close to the lesion, i.e., the end far from the operator, and the "proximal end 102" refers to the opposite, unless otherwise specified.

The semi-automatic biopsy needle 100 of this embodiment has set up a plurality of gears, be convenient for control the depth of penetration, can pull push rod 50 when predetermineeing the gear, push rod 50 drives nook closing member 11, slider 30 and needle tubing 10 are whole to near-end removal, slider 30 compression elastic component 34 this moment, when spacing tooth 40 and the cooperation of corresponding gear latch 31, stop pulling push rod 50, keep slider 30 in current gear through spacing tooth 40, when current gear has also decided the cooperation of nook closing member 11 and needle tubing 10 distal end, the exposed limit length of nook closing member 11.

After the relative position between the far end of the needle core 11 and the target tissue is adjusted, the push rod 50 is pushed to enable the needle core 11 to penetrate into the target assembly, after the needle core 11 penetrates in place, the unlocking part 53 drives the limiting teeth 40 to be separated from the gear latch 31 through the push rod 50, at the moment, under the action of the elastic part 34, the sliding block 30 slides towards the far end, and the sliding block 30 drives the needle tube 10 to cooperate with the needle core 11 to cut the tissue, so that the cutting action is completed. The adjustment of the gear and the release of the sliding block 30 are realized by the push rod 50, the number of control parts is reduced, and the structure is further optimized.

The shape of the housing 20 is not particularly limited, and for example, the housing 20 is substantially a cube, a round bar, or the like, and the housing 20 is a bar shape having a longitudinal direction as a whole in the movement direction of the needle core 11. In order to facilitate the assembly of other components, a split structure may be adopted, i.e. the housing 20 comprises two half shells that are fastened to each other, but may be divided into more parts for facilitating local maintenance or operation. In order to facilitate the mutual fixation between the two half shells, various modes such as a buckle, a screw and the like can be adopted.

The cross-section of the needle cannula 10 is not narrowly limited (e.g., circular in the figures); the proximal end of the needle tube 10 is connected to the slider 30 by means of 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. Wherein, the needle tube 10 is arranged coaxially with the needle core 11; when the needle core 11 penetrates into the needle tube 10, the outer side wall of the needle core 11 can abut against the inner wall of the needle tube 10.

The driving end 111 of the needle core 11 is fixed on the push rod 50 by means of bonding or the like, and the push rod 50 can drive the needle core 11 to move through the driving end 111. The driving end 111 of the needle core 11 is not limited strictly, for example, the exposed portion of the needle core 11 outside the needle tube 10 is the driving end 111.

The slider 30 is reciprocally movable within the housing 20 along the axis of the needle cannula 10 or the hub 11. For example, in order to define the moving path of the housing 20, the opposite sides of the slider 30 are provided with guide portions 35, and the inner wall of the housing 20 is provided with guide slide grooves 223 engaged with the guide portions 35 to be able to define the moving path of the slider 30.

The plurality of gear latches 31 are sequentially arranged along the moving direction of the slider 30; the engagement of the gear latch 31 and the limit tooth 40 can adjust the puncture depth of the stylet 11, so that the depth of the stylet 11 puncturing the tissue can be controlled, and the semi-automatic biopsy needle 100 can be controlled during puncture.

The gear latches 31 are arranged in pairs, and the gear latches 31 in the same pair are respectively located on two opposite sides of the slider 30, and correspondingly, the limiting teeth 40 are matched with the gear latches 31 in the same pair. The number of gear latches 31 is adjusted according to the application, for example, 2 pairs, 3 pairs, or 4 pairs or more, and the number of gear latches 31 is 4 pairs in the figure.

The operation portion 51 of the push rod 50 is not limited strictly, for example, the portion of the push rod 50 exposed outside the housing 20 is the operation end, and the operation portion 51 is substantially L-shaped as shown in the figure.

In this embodiment, as shown in fig. 8 to 9, the distal sidewall of the hub 11 has a sampling slot 112, and the distal end of the needle tube 10 can pass over and open the sampling slot 112.

When the needle core 11 punctures the tissue, the tissue will be partially arranged in the sampling groove 112, the distal end of the needle tube 10 crosses the sampling groove 112 and cuts the tissue, so that the tissue is remained in the sampling groove 112, the single sampling can be realized to meet the inspection requirement, and the operation is simple.

The distal ends of the core 11 and the needle tube 10 converge to form a sharp portion 13, respectively, so that the core 11 penetrates tissue and the needle tube 10 cuts tissue. The needle core 11 is made of nickel-titanium alloy, and the needle tube 10 is made of a bundled tube type needle tube 10 so as to have good bending performance.

In the present embodiment, as shown in fig. 10, the housing 20 includes an upper cover 21 and a lower cover 22 that are engaged with each other, the upper cover 21 and the lower cover 22 enclose a mounting chamber 23, and the mounting chamber 23 is used for accommodating the slider 30 and other components.

The lower cover 22 is substantially of 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 stylet 11 to pass through; the upper cover 21 has a substantially L-shaped configuration, and the upper cover 21 seals the top side and the distal end side of the lower cover 22.

A plurality of first blocks 212 are disposed on two opposite sides of the upper cover 21, and a first locking groove 225 engaged with the corresponding first block 212 is disposed on an inner sidewall of the lower cover 22, so as to fix the lower cover 22 and the upper cover 21 to each other.

Grip handles 221 are fixed to opposite sides of the lower cover 22 to facilitate an operator's grip of the housing 20. Wherein the holding handle 221 protrudes outward from the lower cover 22, and the outer surface of the holding handle 221 is provided with anti-slip threads.

In the present embodiment, as shown in fig. 11 to 12, an escape chute 222 is opened at a bottom side of the lower cover 22, the push rod 50 extends through the bottom side of the lower cover 22, and the transmission portion 52 of the push rod 50 extends into the installation chamber 23 through the escape chute 222.

The opposite sides of the push rod 50 have guide grooves which are combined with the inner wall of the escape chute 222 to define a moving path of the push rod 50. The push rod 50 has two fixed blocks 54 disposed opposite to each other, and the two fixed blocks 54 are located on two sides of a groove wall of the avoiding chute 222 and form the guide groove.

The housing 20 further includes a cover plate 24, and the cover plate 24 is fastened to the bottom side of the lower cover 22 and can shield the push rod 50 and the escape chute 222.

The cover plate 24 has a plate-like structure. A plurality of second latches 241 are disposed on two opposite sides of the cover plate 24, and a second locking groove 226 engaged with the corresponding second latch 241 is disposed on the inner sidewall of the lower cover 22, so as to fix the lower cover 22 and the cover plate 24 to each other.

In this embodiment, the slider 30 directly or indirectly has a gear mark 33, and the housing 20 has a window 211 corresponding to the gear mark 33. Wherein, the window 211 is opened on the upper cover 21.

The gear mark 33 is plate-shaped; the gear mark 33 is located between the sliding block 30 and the upper cover 21, and a plurality of marks are arranged on one side of the gear mark 33 facing the upper cover 21 and are sequentially arranged along the sliding direction of the sliding block 30. For example: from the far end to the near end of the gear mark 33, a plurality of marks are respectively 1, 2, 3 and 4 which are marked in sequence and respectively represent the puncture depth of the needle core 11 to be 10mm, 20mm, 30mm and 40mm.

The sliding block 30 is provided with a top side and a bottom side which are opposite, the needle tube 10 and the gear position marks 33 are arranged on the top side of the sliding block 30, and the gear position latch teeth 31 are sequentially arranged on the bottom side of the sliding block 30 from the proximal end to the distal end; each gear tooth 31 has a proximally facing guide flank 311 and a distally facing locking flank 312, the limiter teeth 40 being able to pass over the guide flanks 311, the limiter teeth 40 being limited against the corresponding locking flanks 312.

The bottom surface of the slider 30 is provided with a catch 32 adjacent the distal side, and the transmission portion 52 of the push rod 50, in combination with the catch 32, acts on the wall of the catch 32 facing the distal side. Wherein, the driving part 52 of the push rod 50 is hook-shaped, so that the driving part 52 is combined with the slot 32.

The gear teeth 31 are disposed in the notches 32, and the bottom sides of the gear teeth 31 are disposed substantially flush with the bottom side of the slider 30. Wherein, the gear latch 31 and the slider 30 are integrally arranged.

As shown in fig. 13 to 14, the slider 30 and the shift indicator 33 are fixed by a snap-fit manner. The bottom side of the gear position mark 33 is provided with a buckling block 331, and the bottom side of the sliding block 30 is provided with a buckling groove 36 matched with the buckling block 331.

In the present embodiment, the elastic member 34 is a compression spring, and abuts between the housing 20 and the proximal end side of the slider 30.

The gear mark 33 and the inner wall of the lower cover 22 are provided with positioning columns, and the end parts of the elastic pieces 34 are sleeved on the corresponding positioning columns. The elastic element 34 is sleeved outside the needle core 11.

In this embodiment, the limit teeth 40 are located on the lower cover 22, and the limit teeth 40 and the lower cover 22 are integrated to enhance the connection strength between the limit teeth 40 and the lower cover 22, and reduce the difficulty of the processing technique of the limit teeth 40 and the lower cover 22.

The limit teeth 40 are configured to be switchable as follows:

a lock position for holding the slider 30 at the current gear against the corresponding gear latch 31;

the unlocking position is separated from the gear latch 31 through self deformation under the action of the unlocking part 53 of the push rod 50, and the slide block 30 is allowed to drive the needle tube 10 to move towards the far end under the driving of the elastic piece 34.

The limiting teeth 40 are kept at the locking position under the condition that the limiting teeth 40 are not subjected to external force; when the limiting teeth 40 are forced to switch from the locking position to the unlocking position, the limiting teeth 40 move towards the bottom side of the lower cover 22 until the limiting teeth 40 are separated from the corresponding gear latch 31.

As shown in fig. 11, the unlocking part 53 of the push rod 50 is at the distal side of the transmission part 52, and the proximal side of the stopper tooth 40 has a guide slope 41 that cooperates with the unlocking part 53.

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

The limit tooth 40 comprises a cantilever 42 and a tooth tip 43, the cantilever 42 extends from the groove wall of the avoidance chute 222 of the lower cover 22 to the proximal end of the lower cover 22, and the cantilever 42 can deform; a tooth tip 43 is at the end of the cantilever 42, the tooth tip 43 being able to abut against the gear latch 31.

The number of the tooth tips 43 is two, and the two tooth tips 43 are respectively located on two opposite sides of the end of the cantilever 42 and respectively cooperate with the same pair of gear latches 31. Wherein the end face of the end of the cantilever 42 is obliquely arranged to form a guide slope 41, and the guide slope 41 is located between two tooth tips 43.

In the present embodiment, as shown in fig. 15 to 16, a stopper 60 is movably mounted on the proximal end side of the housing 20, and the stopper 60 has a first position interfering with the push rod 50 and a second position avoiding the push rod 50.

The shape and the specific structure of the stopper 60 are not strictly limited, and when the stopper 60 is in the first position, the operating portion 51 of the push rod 50 can abut against one side of the stopper 60, which faces away from the housing 20, and at this time, the stopper 60 is located between the operating portion 51 and the housing 20; when the stopper 60 is in the second position, the operating portion 51 of the push rod 50 can directly abut against the distal end side of the housing 20.

The limiting block 60 is mainly used for limiting that the unlocking part 53 of the push rod 50 cannot directly abut against the limiting teeth 40 in the puncturing process, but after the puncturing position of the needle core 11 is observed, the limiting block 60 is moved to the second position, the unlocking part 53 of the push rod 50 abuts against the limiting teeth 40, and the limiting teeth 40 are driven to enter the unlocking position.

The push rod 50 has a third position and a fourth position during the distal movement; in the third position, the operating portion 51 abuts against the stopper 60 located at the first position, and the stopper tooth 40 is located at the lock position; in the fourth position, the operating portion 51 passes over the stop block 60 in the second position until abutting against the proximal side of the housing 20, and the unlocking portion 53 abuts against the stop teeth 40 to drive the stop teeth 40 into the unlocking position.

The proximal end of the housing 20 is provided with a sliding groove 61 for sliding the stopper 60, so as to limit the moving path of the stopper 60. Wherein, the motion path of the stopper 60 is perpendicular to the motion path of the push rod 50.

The distal end side of the lower cover 22 has two oppositely disposed fixing plates 64, with the slide groove 61 formed between the fixing plates 64. When the limiting block 60 is disposed in the sliding groove 61, two opposite side walls of the limiting block 60 respectively abut against or are in clearance fit with the corresponding fixing plates 64.

The stopper 60 has a locking groove 62, and the proximal side of the housing 20 is provided with a locking member 63 engaged with the locking groove 62 to limit the stopper 60 and prevent the stopper 60 from being disengaged from the sliding groove 61.

The locking groove 62 is a through groove penetrating the limiting 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 direction, and the length direction is parallel to the moving direction of the limiting block 60; both side walls in the longitudinal direction of the lock groove 62 can abut against the locking member 63, respectively, so that the limit position of the stopper 60 can be restricted.

The locking member 63 includes a cylinder 631 and a stopper 632, wherein one end of the cylinder 631 is connected to the proximal side of the housing 20, and the other end thereof passes through the locking groove 62; the limiting head 632 is fixed at one end of the cylinder 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 formed with a screw groove for screwing the fastening screw.

In this embodiment, the semi-automatic biopsy needle 100 further comprises a length adjustment tube 70 in abutting communication with the distal end of the housing 20, the needle cannula 10 and the hub 11 extending further distally through the interior of the length adjustment tube 70.

The length-adjusting tube 70 has an axial direction in space, and the axial length of the length-adjusting tube 70 is adjustable, i.e. the distance between the two axial ends of the length-adjusting tube 70 can be adjusted, so as 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.

The length adjusting tube 70 has a passage axially passing through the length adjusting tube 70, one end of the passage is communicated with the inside of the housing 20, the other end is open, and the needle tube 10 and the stylet 11 pass through the passage.

The length adjustment tube 70 comprises a first sleeve 71, a second sleeve 72 and a fastener 73, wherein one end of the first sleeve 71 is connected with the housing 20, the other end of the first sleeve extends away from the housing 20, the second sleeve 72 is sleeved with the first sleeve 71 in a sliding mode, and the fastener 73 acts on the first sleeve 71 and the second sleeve 72 to limit the relative positions of the first sleeve 71 and the second sleeve 72.

The cross-section of the first sleeve 71 is not strictly defined (e.g. circular in the figure). The first sleeve 71 has an axial direction in space, and the first sleeve 71 has a first passage inside for the needle tube 10 and the needle core 11 to pass through, and two ends of the first passage are respectively opened at two axial ends of the first sleeve 71 and are communicated with the inside of the housing 20.

An axial end of the first sleeve 71 is screwed with the housing 20. Specifically, a threaded hole is formed in the distal end side of the upper cover 21, and the proximal end side wall of the first sleeve 71 has an external thread engaged with the threaded hole.

The cross-section of the second sleeve 72 is not strictly defined (e.g., circular in the figures). The second sleeve 72 has an axial direction spatially coinciding 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 two ends of the second passage are respectively opened at two axial ends of the second sleeve 72 and are communicated with the passage of the first sleeve 71.

The outer wall of one end of the first sleeve 71, which is positioned inside the second sleeve 72, is provided with a limiting step 711, and the side wall of the second sleeve 72 is provided with a retaining screw 74 which is matched with the limiting step 711 in a penetrating manner.

The step surface of the limit step 711 faces the proximal end of the first sleeve 71, and the anti-slip screw 74 abuts against the step surface of the limit step 711, so that the second sleeve 72 can be prevented from being pulled off from the first sleeve 71.

Wherein, the outer side wall of the second sleeve 72 is concave, and the concave distal side is a limit step 711. The side wall of the second sleeve 72 is provided with a threaded hole, and the anti-falling screw 74 is in threaded connection with the threaded hole, extends into the recessed part and is in clearance fit with the recessed bottom wall.

The fastening piece 73 is a fastening screw, a first mounting hole is formed in the side wall of the second sleeve 72, the fastening piece 73 is connected to the first mounting hole in a threaded mode, and one end of the fastening screw abuts against the outer wall of the first sleeve 71.

In this embodiment, semi-automatic biopsy needle 100 further comprises a coupling assembly 80 coupled to the distal end of second cannula 72, coupling assembly 80 having an adapter structure corresponding to endoscope passage port 90.

The main function of the connecting assembly 80 is to fix the endoscope passage port 90 to the distal end of the second cannula 72, and the connecting assembly 80 has a connecting passage inside thereof, which can communicate the second cannula 72 and the endoscope passage port 90, so that the hub 11 and the needle tube 10 can be passed into the endoscope passage port.

As shown in fig. 17 to 20, the connecting assembly 80 includes a joint 81 and a connecting member 82, the joint 81 is movably sleeved on the distal end of the second sleeve 72; the connector 82 is screwed to the connector 81 and can be engaged with the endoscope passage port 90.

The outer side wall of the second sleeve 72 is provided with a boss 84, the distal end of the second sleeve 72 is screwed with a plug 83, the boss 84 and the plug 83 are respectively arranged at two axial ends of the joint 81, and the joint 81 is axially positioned. When the connector 81 is fixed to the distal end of the second sleeve 72, the connector 81 is fitted over the second sleeve 72, and the connector 81 is fixed by tightening the plug 83, and the plug 83 and the boss 84 press the connector 81.

The joint 81 has a substantially cylindrical shape (e.g., a cylinder in the drawing). The joint 81 has a substantially spatial axis, the joint 81 includes a first portion 811 and a second portion 812 arranged along its axis, and the first portion 811 and the second portion 812 are both cylindrical; the second portion 812 has a radial dimension greater than the first portion 811, with a radial clearance between the second portion 812 and the second sleeve 72; plug 83 is disposed in the radial gap and abuts the distal end of first portion 811, and boss 84 abuts the proximal end of first portion 811. Wherein the connector 82 has a threaded post 823 that is threaded with the second portion 812.

The plug 83 has a through hole 831 for the needle tube 10 to pass through, and the sidewall of the needle tube 10 is in clearance or contact fit with the inner wall of the through hole 831.

The plug 83 is substantially disc-shaped. The outer periphery of plug 83 projects from the side wall of second sleeve 72 and extends proximally to be able to abut against the distal side of 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 coupled to the second sleeve 72; the through hole 831 extends from the screw connection section 832 to the extension section 833, and can support the needle tube 10 and the needle core 11.

The endoscope passage port 91 is provided with an annular groove 92, and the connecting member 82 has a snap groove 821 provided in an open manner, and a wall of the snap groove 821 is coupled to the annular groove 92 to enable the endoscope passage port 90 to be connected to the second sleeve 72.

The attachment member 82 further has a holding groove 822 for holding the endoscope passage port 91; the support groove 822 is open and the inner wall of the support groove 822 abuts against the side wall of the endoscope passage opening 91.

The clamping groove 821 and the supporting groove 822 are both arranged in a U shape, and the opening of the U shape is convenient for the endoscope passage port 91 to enter and exit.

As shown in fig. 1 to 20, the present application further provides a puncture system including the semi-automatic biopsy needle 100 and the endoscope apparatus in the above embodiments;

the endoscope apparatus includes at least one working channel through which the needle core 11 and the needle tube 10 extend, an endoscope passage port 91 communicating with the working channel is provided at a proximal end portion of the endoscope apparatus, and a semi-automatic biopsy needle 100 is butted to the endoscope passage port 90.

The endoscope apparatus further includes a tube body 90, and an endoscope passage port 91 is provided in a side wall of the tube body 90. The tube body 90 has a plurality of working channels for passing through the pipeline, wherein one of the working channels is used for extending the needle core 11 and the needle tube 10 and is communicated with the endoscope passage port 91.

The operation steps of the puncture system are set forth below:

pulling the push rod 50 to the corresponding gear position, such as to 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 sliding block 30 and the needle tube 10 to integrally move towards the proximal end, at the moment, the sliding block 30 compresses the elastic part 34, and when the limiting teeth 40 are matched with the corresponding gear latch 31, the push rod 50 stops being pulled;

the length-adjusting tube 70 reaches the extreme position of the length, and then the endoscope passage port 91 is fixed to the distal end of the second sleeve 72;

observing the position of the needle tube 10 through an endoscope, and adjusting the length of the adjusting tube 70 to enable the needle tube 10 to meet the requirement;

adjusting the stop block 60 to the first position;

the push rod 50 is pushed to enable the needle core 11 to penetrate into a target tissue position, whether the penetration is in place or not is observed, if the penetration is in place, the limiting block 60 is adjusted to the second position, the push rod 50 is pushed, the unlocking part 53 of the push rod 50 drives the limiting tooth 40 to be separated from the gear latch 31 under the action of the guide inclined plane 41, the sliding block 30 rebounds under the action of the elastic piece 34, and the needle tube 10 cuts the tissue to finish the cutting action;

separating the semi-automatic biopsy needle 100 from the endoscope passage port 91;

and pulling the push rod 50 to the target gear again, adjusting the limiting block 60 to the first position, pushing the push rod 50 forward, taking out the tissue, and completing sampling.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features. When technical features in different embodiments are represented in the same drawing, it can be seen that the drawing also discloses a combination of the embodiments concerned.

The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application.

Claims (10)

1. Through endoscope with semi-automatic biopsy needle, relative distal end and near-end have, semi-automatic biopsy needle includes casing and by interior and outer nested nook closing member and needle tubing in proper order, the near-end of nook closing member just extends as the drive end the needle tubing, its characterized in that, semi-automatic biopsy needle still includes:

the sliding block is slidably arranged in the shell, the near end of the needle tube is fixed on the sliding block, and a plurality of gear clamping teeth are distributed on the sliding block;

the elastic piece is arranged in the shell and drives the sliding block to move towards the far end;

the limiting teeth are movably arranged in the shell and matched with the gear clamping teeth to limit the sliding block to move towards the far end;

the push rod is fixed with the driving end of the needle core and at least comprises an operating part arranged outside the shell, a transmission part which is in one-way linkage with the sliding block and only drives the sliding block to move towards the near end, and an unlocking part which drives the limiting teeth and the gear clamping teeth to separate.

2. The semi-automatic endoscopic biopsy needle according to claim 1, wherein the slider directly or indirectly has a gear mark, and the housing has a window corresponding to the gear mark.

3. The endoscopic semi-automatic biopsy needle according to claim 2, wherein the slider has opposite top and bottom sides, the needle cannula and the gear indicator are both located on the top side of the slider, and the gear latches are sequentially arranged on the bottom side of the slider from the proximal end to the distal end;

each gear latch is provided with a guide tooth surface facing to the near end and a locking tooth surface facing to the far end, and the limiting teeth are abutted with the locking tooth surfaces corresponding to the positions for limiting;

the bottom surface of the sliding block is provided with a clamping groove at a position close to the far end side, and the transmission part of the push rod is combined with the clamping groove and acts on the groove wall of the clamping groove facing to the far end side.

4. The endoscopic semi-automatic biopsy needle according to claim 2, wherein the housing comprises an upper cover and a lower cover which are buckled with each other, the upper cover and the lower cover enclose a mounting chamber for accommodating the slider, the window is opened on the upper cover, and the limiting teeth are positioned on the lower cover;

the push rod extends from the bottom side of the lower cover, an avoiding sliding groove is formed in the bottom side of the lower cover, and a transmission part of the push rod extends into the installation chamber through the avoiding sliding groove.

5. The endoscopic semi-automatic biopsy needle according to claim 4, wherein the stopper tooth is integrally structured with the lower cover, and the stopper tooth is configured to be switchable between:

the lock position is abutted against the corresponding gear latch to keep the slide block at the current gear;

the unlocking position is separated from the gear latch through self deformation under the action of the unlocking part of the push rod, and the slide block is allowed to drive the needle tube to move towards the far end under the driving of the elastic piece.

6. The endoscopic semi-automatic biopsy needle according to claim 1, wherein the transmission portion of the push rod is hook-shaped, and the unlocking portion is at a distal end side of the transmission portion;

the proximal end side of the limit tooth is provided with a guide inclined surface matched with the unlocking part.

7. The endoscopic semi-automatic biopsy needle according to claim 1, wherein a stopper is movably mounted to a proximal end side of the housing, the stopper having a first position interfering with the push rod and a second position avoiding the push rod;

the push rod has the following components in the process of moving towards the far end:

the operating part is abutted against the limiting block at the first position, and the limiting teeth are positioned at the locking position;

and in the fourth position, the operating part passes over the limiting block in the second position until abutting against the proximal end side of the shell, and the unlocking part abuts against the limiting teeth to drive the limiting teeth to enter the unlocking position.

8. The endoscopic semi-automatic biopsy needle of claim 1, further comprising a length adjustment tube in abutting communication with the distal end of the housing, the needle cannula and the hub extending further distally via an interior of the length adjustment tube.

9. The endoscopic semi-automatic biopsy needle according to claim 1, wherein the distal sidewall of the core has a sampling slot, the distal end of the needle cannula being capable of passing over and opening the sampling slot;

the needle core and the distal end of the needle tube are respectively converged and furled to form a sharp part.

10. A puncture system comprising the endoscopically semi-automatic biopsy needle of any one of claims 1-9 and an endoscopic device;

the endoscope device comprises at least one working channel for the needle core and the needle tube to extend, an endoscope channel port communicated with the working channel is arranged at the proximal end part of the endoscope device, and the semi-automatic biopsy needle is connected to the endoscope channel port.

Images