Surgical instrument sealing structure and calculus removing mesh basket

Abstract

The embodiment provides a surgical instrument sealing structure and a calculus removing mesh basket, and relates to the field of surgical instruments, and the surgical instrument sealing structure comprises a positioning cap, a handle and a sealing piece. The positioning cap is provided with a first positioning channel and a liquid injection channel, and the first positioning channel is communicated with the liquid injection channel. The handle is provided with a second positioning channel, and the first positioning channel and the second positioning channel are used for penetrating of an inhaul cable. The handle is connected with the positioning cap, the handle and the positioning cap are rotatably matched around the axis of the first positioning channel, and the handle and the positioning cap are relatively fixed in the extending direction of the axis. The sealing piece is arranged between the positioning cap and the handle and used for preventing liquid flowing in the first positioning channel from leaking from the end, close to the handle, of the first positioning channel. Through the design of the sealing structure, the sealing performance of the connecting position of the positioning cap and the handle can be improved, and therefore the risk that a contrast agent leaks from the handle is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to surgical equipment field, specifically, relate to a surgical instrument sealing structure and stone basket. BACKGROUND

[0002] Stone basket is a kind of medical instrument for removing calculus in endoscopic surgery, and is widely used in urology, biliary tract and digestive internal medicine department etc.Stone basket is generally introduced into body through endoscope, and calculus is captured and removed by using its unique mesh structure.In the surgical process, in order to see the position of stone basket into human body, contrast medium needs to be injected at handle, and contrast medium enters from injection port on handle, passes through sheath tube and enters human body from the front end of basket.

[0003] The inventor found at least the following shortcomings of the handle of the prior art stone basket in research:

[0004] The sealing property of handle is poor, and contrast medium is easy to leak from handle. UTILITY MODEL CONTENT

[0005] The utility model aims to provide a surgical instrument sealing structure and stone basket, which can improve the sealing property of the connecting position of positioning cap and handle, thereby reducing the risk of contrast medium leakage from handle.

[0006] The embodiment of the utility model can be realized as follows:

[0007] In a first aspect, the utility model provides a surgical instrument sealing structure, comprising:

[0008] Positioning cap, handle and sealing element;The positioning cap is provided with first positioning channel and injection channel, and the first positioning channel communicates with the injection channel;The handle is provided with second positioning channel, and the first positioning channel and the second positioning channel are both used for threading cable;The handle is connected with the positioning cap, the handle and the positioning cap are rotatably matched around the axis of the first positioning channel, and the two are relatively fixed in the extension direction of the axis;The sealing element is arranged between the positioning cap and the handle, and the sealing element is used to prevent liquid flowing in the first positioning channel from leaking from the end of the first positioning channel close to the handle.

[0009] In an optional embodiment, one end of the positioning cap is provided with positioning convex column, and the first positioning channel penetrates the positioning convex column;One end of the handle is provided with positioning recess, and the positioning convex column is inserted into the positioning recess, and the positioning convex column and the positioning recess hold the sealing element.

[0010] Based on the above scheme, the sealing piece is squeezed and deformed by the cooperation of the positioning convex column and the positioning groove, and the sealing is realized by the close contact with the positioning convex column and the positioning groove, so that the sealing effect is good. Moreover, the position of the sealing piece is stable and reliable, and it is not easy to shift and cause sealing failure.

[0011] In an optional embodiment, the sealing piece comprises a sealing cylinder part and a sealing plate part connected together, the sealing cylinder part is sleeved outside the positioning convex column, and the sealing cylinder part is clamped between the outer peripheral surface of the positioning convex column and the groove peripheral wall of the positioning groove; the sealing plate part is clamped between the end surface of the positioning convex column and the groove bottom wall of the positioning groove.

[0012] Based on the above scheme, after the positioning convex column and the positioning groove are inserted and cooperated, the sealing cylinder part and the sealing plate part are both squeezed and deformed, the sealing plate part forms a first sealing area between the end surface of the positioning convex column and the groove bottom wall of the positioning groove, and the sealing cylinder part forms a second sealing area between the outer peripheral surface of the positioning convex column and the groove peripheral wall of the positioning groove, so that the multiple sealing areas are cooperated to improve the sealing effect.

[0013] In an optional embodiment, the sealing plate part is provided with a sealing through hole for the inhaul cable to pass through.

[0014] Based on the above scheme, the inhaul cable passes through the sealing through hole when entering the second positioning channel from the first positioning channel, and the inhaul cable is in sealing cooperation with the sealing through hole, so that the liquid flowing in the first positioning channel is not easy to leak from the position where the inhaul cable and the sealing piece are connected, and the sealing effect is good.

[0015] In an optional embodiment, the sealing cylinder part and the positioning groove are relatively fixed in the circumferential direction of the positioning groove.

[0016] Based on the above scheme, when the handle is held and the positioning cap is rotated relative to the handle, the sealing piece will not rotate relative to the handle, so that the position of the sealing piece is stable and reliable, and it is not easy to cause poor sealing effect due to torsional deformation caused by rotation.

[0017] In an optional embodiment, the cross section of the sealing cylinder part is non-circular in outer contour; and the cross section of the groove peripheral wall of the positioning groove is non-circular in contour.

[0018] Based on the above scheme, the structure of the sealing cylinder part and the positioning groove is simple, which is convenient for processing and manufacturing, assembly, and has good anti-rotation effect.

[0019] In an optional embodiment, the positioning cap is provided with a first buckle, the handle is provided with a second buckle, and the first buckle is in clamping cooperation with the second buckle.

[0020] Based on the above scheme, the cooperation structure of the positioning cap and the handle is simple, which is convenient for assembly and has high assembly efficiency.

[0021] In an optional embodiment, one of the first buckle and the second buckle is provided as a protrusion, and the other of the first buckle and the second buckle is provided as a groove, and the protrusion is engaged with the groove.

[0022] Based on the above scheme, the first buckle and the second buckle are simple in structure, easy to process, and convenient to assemble.

[0023] In an optional embodiment, the protrusion and / or the groove is provided as a ring structure.

[0024] Based on the above scheme, by providing the protrusion and / or the groove as a ring structure, when the protrusion and the groove are engaged, the step of adjusting the position of the positioning cap and the handle in the circumferential direction is omitted, the assembly difficulty is reduced, and the assembly efficiency is improved. When the positioning cap and the handle rotate relative to each other, the protrusion and the groove will not be separated, and the protrusion and the groove can always limit the axial freedom degree of the positioning cap and the handle, and the anti-separation effect is good.

[0025] In a second aspect, the utility model provides a stone extraction net basket, the stone extraction net basket includes:

[0026] The surgical instrument sealing structure of any one of the preceding embodiments.

[0027] The beneficial effects of the embodiments of the utility model include, for example:

[0028] In summary, the surgical instrument sealing structure provided by the embodiments can prevent the liquid flowing in the first positioning channel on the positioning cap from leaking from the end of the first positioning channel close to the handle. When the contrast medium is injected through the injection channel, the contrast medium enters the first positioning channel, and part of the contrast medium flowing towards the handle is blocked by the sealing member and is not easy to leak from the end of the first positioning channel close to the handle. This allows the contrast medium to smoothly enter the sheath tube from the end of the first positioning channel away from the handle, i.e. the front end of the first positioning channel, and be discharged from the sheath tube into the human body, so as to facilitate subsequent observation of the position of the surgical tool such as the net basket through the contrast medium. At the same time, during use, the positioning cap can also rotate relative to the handle, and the relative position of the positioning cap and the handle can be adjusted according to the surgical environment, so that the positioning cap is flexible to use. The sealing member can also play a sealing role when the positioning cap rotates, achieving dynamic sealing and good sealing effect. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained from these drawings without creative labor.

[0030] Figure 1 It is a schematic view of the surgical instrument sealing structure of the embodiment of the present application.

[0031] Figure 2 It is a sectional view of the surgical instrument sealing structure of the embodiment of the present application.

[0032] Figure 3 It is a schematic view of the handle of the embodiment of the present application. Figure 2 It is a partial enlarged schematic view of the embodiment of the present application.

[0033] Figure 4 It is a schematic view of the handle of the embodiment of the present application.

[0034] Figure 5 It is a schematic view of the rod body of the embodiment of the present application.

[0035] Figure 6 It is a schematic view of the positioning cap of the embodiment of the present application.

[0036] Figure 7 It is a schematic view of the sealing member of the embodiment of the present application.

[0037] Figure 8 It is a schematic view of the stone basket of the embodiment of the present application.

[0038] Figure:

[0039] 100-positioning cap; 110-main body; 111-reduced diameter section; 112-external thread groove; 113-assembly groove; 114-first positioning channel; 120-injection tube; 121-liquid injection channel; 130-positioning protrusion; 140-first buckle; 200-handle; 210-rod body; 211-positioning groove; 212-notch; 213-second positioning channel; 214-second buckle; 215-guide hole; 216-chamfer; 220-sliding ring; 300-sealing member; 310-sealing cylinder; 320-sealing plate; 321-sealing through hole; 001-sheath tube; 002-sheath; 003-pull cable. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model below. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. The components of the embodiments of the utility model described and shown in the drawings can be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the utility model.

[0042] It should be noted that: similar signs and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0043] In the description of the utility model, it should be explained that if the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship of the product of the invention when it is usually placed, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model.

[0044] In addition, if the terms "first", "second" and the like appear, they are only used for differentiation description, and cannot be understood as indicating or implying relative importance.

[0045] It should be noted that the features in the embodiments of the utility model can be combined with each other without conflict.

[0046] In the prior art, when the surgical instrument such as the stone basket is used, in order to observe the position of the basket body, generally, contrast medium needs to be injected from the handle 200, and the contrast medium enters the human body through the sheath tube 001. Due to the structural limitation of the handle 200, the contrast medium is easy to leak from the proximal end of the handle 200 when injected, and the use is inconvenient.

[0047] In view of this, the designer provides a surgical instrument sealing structure, which can improve the sealing performance of the proximal end of the handle 200, prevent the contrast medium from leaking from the proximal end of the handle 200, and improve the surgical efficiency.

[0048] Please refer to Figure 1 and Figure 2The embodiment provides a surgical instrument sealing structure, which comprises a positioning cap 100, a handle 200 and a sealing element 300. The positioning cap 100 is provided with a first positioning channel 114 and a liquid injection channel 121, and the first positioning channel 114 communicates with the liquid injection channel 121. The handle 200 is provided with a second positioning channel 213, and the first positioning channel 114 and the second positioning channel 213 are used for penetrating a cable 003. The handle 200 is connected with the positioning cap 100, the handle 200 and the positioning cap 100 are rotatably matched around an axis of the first positioning channel 114, and the handle 200 and the positioning cap 100 are fixed relative to each other in an extension direction of the axis. The sealing element 300 is arranged between the handle 200 and the positioning cap 100, and the sealing element 300 is used for preventing liquid flowing in the first positioning channel 114 from leaking from an end of the first positioning channel 114 close to the handle 200.

[0049] As described above, the working principle of the surgical instrument sealing structure provided by the embodiment is as follows:

[0050] During a surgery, when a contrast operation needs to be performed, contrast liquid is injected through the liquid injection channel 121, the contrast liquid enters the first positioning channel 114, and part of the contrast liquid flowing towards the handle 200 is blocked by the sealing element 300, so that the contrast liquid cannot easily leak from the end of the first positioning channel 114 close to the handle 200, and the contrast liquid can smoothly enter the sheath tube 001 from the end of the first positioning channel 114 away from the handle 200, that is, the front end of the first positioning channel 114, is discharged from the sheath tube 001 into the human body, so as to facilitate subsequent observation of the position of a surgical tool such as a basket through the contrast liquid. Meanwhile, during use, the positioning cap 100 can also rotate relative to the handle 200, the relative position of the positioning cap 100 and the handle 200 can be adjusted according to the surgical environment, and the use is flexible. The sealing element 300 can also play a sealing role when the positioning cap 100 rotates, dynamic sealing is realized, and the sealing effect is good.

[0051] The following embodiment describes the details of the surgical instrument sealing structure of the application in an exemplary manner.

[0052] Please refer to Figures 1-3 In the embodiment, optionally, the surgical instrument sealing structure comprises the positioning cap 100, the handle 200 and the sealing element 300. The handle 200 and the positioning cap 100 are detachably inserted and matched, the handle 200 and the positioning cap 100 can rotate relative to each other, the handle 200 and the positioning cap 100 cannot move relative to each other in the axial direction, that is, the axial degree of freedom of the handle 200 and the positioning cap 100 is limited, and during use, the handle 200 and the positioning cap 100 are not easy to be loosened. The sealing element 300 is arranged between the handle 200 and the positioning cap 100, and can seal the gap between the handle 200 and the positioning cap 100.

[0053] Due to the design of the sealing member 300, the sealing between the positioning cap 100 and the handle 200 can be improved, so as to reduce the leakage of the contrast medium from the handle 200 when the contrast medium is injected from the positioning cap 100, and the contrast medium can smoothly enter the human body from the positioning cap 100 and the sheath tube 001.

[0054] Please refer to Figure 3 and Figure 6 In the embodiment, the positioning cap 100 can alternatively include an integrated main body 110 and an injection tube 120. The main body 110 is generally cylindrical, and one end of the main body 110 is provided with a reduced-diameter section 111, which can be provided as a threaded stud, i.e., the outer circumferential surface of the reduced-diameter section 111 is provided with an external thread groove 112. One end of the main body 110 is provided with a fitting groove 113, which can be a circular groove. The main body 110 is provided with a first positioning channel 114 extending in the axial direction thereof, which can be a cylindrical hole, and one end of the first positioning channel 114 penetrates the groove bottom wall of the fitting groove 113. The first positioning channel 114 and the fitting groove 113 are coaxially arranged and collinear with the axis of the main body 110. The injection tube 120 is arranged on the outer circumferential surface of the main body 110, and the extension direction of the injection tube 120 has an included angle with the axial direction of the main body 110, which can be an acute angle. The lumen of the injection tube 120 can be referred to as an injection channel 121, which is in communication with the first positioning channel 114, and the axes thereof are arranged at an acute angle.

[0055] Meanwhile, the groove bottom wall of the fitting groove 113 of the main body 110 is provided with a positioning protrusion 130, which can be a cylindrical body, and the positioning protrusion 130 is coaxially arranged with the main body 110, and the first positioning channel 114 penetrates the positioning protrusion 130.

[0056] Further, the groove peripheral wall of the fitting groove 113 of the main body 110 is provided with a first buckle 140, which can be a protrusion or a groove, and is designed as needed, for example, in the embodiment, the first buckle 140 can be provided as a protrusion. The number of the first buckles 140 is designed as needed, for example, in the embodiment, the number of the first buckles 140 is two and is arranged at intervals in the circumferential direction of the fitting groove 113, and the two first buckles 140 can be arranged centrally symmetrically, which is beneficial for processing.

[0057] In addition, each first buckle 140 can be a strip-shaped protrusion, the length of the first buckle 140 extends in the circumferential direction of the fitting groove 113, the surface area of the first buckle 140 is large, the contact area is large, the buckling effect is good, and it is not easy to loosen.

[0058] Please refer to Figures 3-5In the embodiment, the handle 200 includes a rod body 210 and a sliding ring 220, which is slidably connected with the rod body 210 in the axial direction of the rod body 210. The rod body 210 has a front end and a rear end in the length direction thereof, and the front end is connected with the positioning cap 100. The front end is provided with a positioning groove 211 having a notch 212, and a second positioning channel 213 is formed through the groove bottom wall of the positioning groove 211 and coaxially arranged with the positioning groove 211. The cross-sectional profile of the positioning groove 211 is non-circular, for example, the cross-sectional profile of the positioning groove 211 is a regular hexagon in the embodiment. The cross-section is a plane perpendicular to the axis of the positioning groove 211. The outer circumferential surface of the rod body 210 is provided with a second buckle 214, which can be a protrusion or a groove. For example, the second buckle 214 is a groove in the embodiment, and the second buckle 214 can be arranged as an annular groove extending around the axis of the handle 200.

[0059] Optionally, the rod body 210 is provided with a guide hole 215, one end of the guide hole 215 is in communication with the second positioning channel 213 and the notch 212, and part of the sliding ring 220 is inserted into the guide hole 215. The sliding ring 220 is slidably connected with the handle 200 in the guide hole 215, and the guide hole 215 plays a guiding role in the sliding of the sliding ring 220.

[0060] In addition, the front end edge of the rod body 210 can be provided with a chamfer 216, which can be a round chamfer.

[0061] Please refer to Figure 3 and Figure 7 In the embodiment, the sealing member 300 includes a sealing cylinder portion 310 and a sealing plate portion 320 connected with each other, and the sealing cylinder portion 310 and the sealing plate portion 320 can be arranged as an integrated structure and can be made of silica gel. The sealing cylinder portion 310 is substantially cylindrical, and the sealing plate portion 320 is located at one end of the sealing cylinder portion 310, so that the sealing member 300 is substantially a cylindrical structure with one end open and the other end closed. The cross-sectional outer profile of the sealing cylinder portion 310 is non-circular, for example, the cross-sectional outer profile of the sealing cylinder portion 310 is a regular hexagon in the embodiment, which matches the shape of the positioning groove 211. The cross-sectional inner profile of the sealing cylinder portion 310 is circular, which matches the shape of the positioning protrusion. The cross-section is a plane perpendicular to the axis of the sealing cylinder portion 310. Moreover, the middle part of the sealing plate portion 320 is provided with a sealing through hole 321, which can be a circular hole, and the sealing through hole 321 is used for the passage of the cable 003.

[0062] In the embodiment, the assembly mode of the positioning cap 100, the handle 200 and the sealing member 300 includes, for example:

[0063] First, the sealing cylinder part 310 of the sealing part 300 is sleeved on the positioning convex column 130, the end face of the positioning convex column 130 abuts on the inner side face of the sealing plate part 320, and the first positioning channel 114 and the sealing through hole 321 are coaxial and communicated. At this time, the assembly of the sealing part 300 and the positioning cap 100 is completed. Then, the front end of the rod body 210 is inserted into the assembly groove 113, and the sealing part 300 is correspondingly inserted into the positioning groove 211. With the increase of the insertion depth of the rod body 210, the first buckle 140 on the groove wall of the sealing groove is buckled and matched with the second buckle 214 on the rod body 210. That is, the first buckle 140 first contacts the chamfer 216 at the front end of the rod body 210, and under the guidance of the chamfer 216, the front end of the rod body 210 first shrinks inward. When the front end passes the first buckle 140, the first buckle 140 reaches the second buckle 214, the first buckle 140 loses the inward extrusion force on the outer circumferential surface of the rod body 210, the rod body 210 expands outward to reset, the first buckle 140 and the second buckle 214 are buckled and matched, and the assembly of the handle 200 and the positioning cap 100 is completed. At this time, the axial degree of freedom of the handle 200 and the positioning cap 100 is limited, and the two are not easy to move axially and fall off. The two can rotate around the axis of the handle 200, and are flexible to use. At the same time, the sealing cylinder part 310 is clamped between the outer circumferential surface of the positioning convex column 130 and the groove wall of the positioning groove 211, the sealing plate part 320 is clamped between the end face of the positioning convex column 130 and the groove bottom wall of the positioning groove 211, the first positioning channel 114, the sealing through hole 321 and the second positioning through hole are sequentially communicated, the pull rope 003 can be simultaneously arranged in the first positioning channel 114, the sealing through hole 321 and the second positioning channel 213, and connected with the slip ring 220. By sliding the slip ring 220 relative to the rod body 210, the tightness of the pull rope 003 can be adjusted. The sealing cylinder part 310 and the sealing plate part 320 are extruded to deform, the sealing plate part 320 forms a first sealing area between the end face of the positioning convex column 130 and the groove bottom wall of the positioning groove 211, and the sealing cylinder part 310 forms a second sealing area between the outer circumferential surface of the positioning convex column 130 and the groove wall of the positioning groove 211. The multiple sealing areas cooperate to improve the sealing effect.

[0064] It is worth noting that after the sealing cylinder part 310 and the positioning groove 211 are inserted, the outer circumferential surface of the sealing cylinder part 310 and the groove wall of the positioning groove 211 are fitted. Since the outer circumferential surface is a regular hexagon and the groove wall of the positioning groove 211 is a regular hexagon, the sealing part 300 and the handle 200 are relatively fixed in the circumferential direction of the handle 200, that is, the two will not rotate relative to each other. In this way, when the positioning cap 100 rotates, the sealing part 300 will not rotate, and the sealing part 300 is not easy to appear the case that the sealing effect is poor due to the torsional deformation caused by rotation.

[0065] And, by setting the second buckle 214 as a ring-shaped groove, the step of adjusting the position of the positioning cap 100 and the handle 200 in the circumferential direction is omitted when the protrusion and the groove are inserted and fitted, the assembly difficulty is reduced, and the assembly efficiency is improved. When the positioning cap 100 and the handle 200 rotate relative to each other, the protrusion and the groove will not be separated, and the protrusion and the groove can always limit the axial freedom of the positioning cap 100 and the handle 200, and the anti-disengagement effect is good.

[0066] It should be understood that in other embodiments, the first buckle 140 can be set as a groove, and correspondingly, the second buckle 214 can be set as a protrusion. In addition, the first buckle 140 and the second buckle 214 can both be set as a ring-shaped structure. In addition, in some embodiments, the first buckle 140 can be set as a ring-shaped structure.

[0067] The surgical instrument sealing structure provided in the embodiment has the sealing element 300 arranged between the positioning cap 100 and the handle 200, and the sealing effect between the positioning cap 100 and the handle 200 is good. When the contrast medium is injected from the liquid injection channel 121 of the positioning cap 100, the contrast medium enters the first positioning channel 114 and is not easy to leak from the port of the first positioning channel 114 close to the second positioning channel 213, but can smoothly enter the sheath tube 001 connected with the positioning cap 100 from the first positioning channel 114, and enter the human body from the sheath tube 001, so that the contrast operation is more smooth and reliable. In addition, the pull cable 003 is arranged in the sealing through hole 321 of the sealing element 300, and the sealing effect between the pull cable 003 and the sealing element 300 is good, so that the contrast medium is not easy to leak from the sealing through hole 321.

[0068] Please refer to Figure 8 For the convenience of display, only part of the structure of the sheath tube 001 and the pull cable 003 is shown in the figure. The embodiment also provides a stone retrieval basket, which comprises a basket body (not shown in the figure), a sheath tube 001, a sheath 002, a pull cable 003 and the surgical instrument sealing structure of the above-mentioned embodiment. The basket body is installed at the front end of the sheath tube 001, the rear end of the sheath tube 001 is inserted and fixed to the end of the main body 110 away from the handle 200, the sheath 002 is sleeved outside the sheath tube 001, and the sheath 002 is screw-fixed with the reduced diameter section 111 on the main body 110, thereby playing a role in protecting and positioning the sheath tube 001. The pull cable 003 is arranged in the sheath tube 001 and sequentially passes through the first positioning channel 114, the sealing through hole 321, the second positioning channel 213 and the guide hole 215, the front end of the pull cable 003 is connected with the basket body, and the rear end of the pull cable 003 is connected with the slip ring 220. By sliding the slip ring 220 relative to the rod body 210, the basket body can be driven to move through the pull cable 003, so as to adjust the state of the basket body.

[0069] The stone extraction net basket provided by the embodiment is used for injecting contrast medium through the liquid injection channel 121 on the positioning cap 100 during surgery, the contrast medium can enter the sheath tube 001 from the first positioning channel 114, is discharged from the sheath tube 001 and then enters the human body, thereby reaching the position of the net basket body, and the state of the net basket body is beneficial to observation and surgery. The rear end of the first positioning channel 114 is provided with a sealing piece 300, and the contrast medium is not prone to leakage from the rear end of the first positioning channel 114, so that the operation is safe and reliable.

[0070] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A surgical instrument seal structure, comprising: The sealing structure comprises a positioning cap (100), a handle (200) and a sealing member (300); the positioning cap (100) is provided with a first positioning channel (114) and a liquid injection channel (121), the first positioning channel (114) communicates with the liquid injection channel (121); the handle (200) is provided with a second positioning channel (213), the first positioning channel (114) and the second positioning channel (213) are both used for threading a cable (003); the handle (200) is connected with the positioning cap (100), the handle (200) and the positioning cap (100) are rotatably matched around the axis of the first positioning channel (114), and the handle (200) and the positioning cap (100) are fixed relative to each other in the extension direction of the axis; the sealing member (300) is arranged between the positioning cap (100) and the handle (200), and the sealing member (300) is used for preventing liquid flowing in the first positioning channel (114) from leaking from the end of the first positioning channel (114) close to the handle (200).

2. The sealing structure of the surgical instrument according to claim 1, wherein: one end of the positioning cap (100) is provided with a positioning protruding column (130), the first positioning channel (114) penetrates through the positioning protruding column (130); one end of the handle (200) is provided with a positioning recess (211), the positioning protruding column (130) is inserted into the positioning recess (211), and the positioning protruding column (130) and the positioning recess (211) clamp the sealing member (300) in cooperation.

3. The sealing structure of the surgical instrument according to claim 2, wherein: the sealing member (300) comprises a sealing cylinder part (310) and a sealing plate part (320) connected with each other, the sealing cylinder part (310) is sleeved outside the positioning protruding column (130), and the sealing cylinder part (310) is clamped between the outer peripheral surface of the positioning protruding column (130) and the groove peripheral wall of the positioning recess (211); the sealing plate part (320) is clamped between the end surface of the positioning protruding column (130) and the groove bottom wall of the positioning recess (211).

4. The sealing structure of the surgical instrument according to claim 3, wherein: the sealing plate part (320) is provided with a sealing through hole (321) for threading the cable (003).

5. The sealing structure of the surgical instrument according to claim 3, wherein: the sealing cylinder part (310) is fixed relative to the positioning recess (211) in the circumferential direction of the positioning recess (211).

6. The sealing structure of the surgical instrument according to claim 5, wherein: the outer contour of the cross section of the sealing cylinder part (310) is non-circular; and the groove peripheral wall of the positioning recess (211) is non-circular in cross section contour.

7. The sealing structure of the surgical instrument according to any one of claims 2-6, wherein: ​ ​ ​ ​ ​ ​ A first buckle (140) is arranged on the positioning cap (100), and a second buckle (214) is arranged on the handle (200), the first buckle (140) and the second buckle (214) are in clasp connection.

8. The surgical instrument seal structure of claim 7, wherein: One of the first buckle (140) and the second buckle (214) is arranged as a protrusion, and the other of the first buckle (140) and the second buckle (214) is arranged as a groove, the protrusion and the groove are in clasp connection.

9. The surgical instrument seal structure of claim 8, wherein: The protrusion and / or the groove are arranged as a ring structure.

10. A stone retrieval basket characterized by, The stone extraction basket comprises: The surgical instrument seal structure of any one of claims 1-9.

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