CN218305054U - Detachable double-layer sleeve for intervertebral foramen endoscopic surgery - Google Patents

Abstract

The utility model provides a intervertebral foramen mirror operation is used can dismantle double-deck sleeve pipe, including crooked spring, spacing short round pin and the straight spring that corresponds with it and the screw of screwing that split formula outer tube, interior sleeve pipe, connecting screw, tubulose shifting pin and correspond with it. The split outer sleeve is circular and is divided into an end cover and a base, the tubular shifting pin and the bending spring are placed in the split outer sleeve, and the split outer sleeve is connected with the upper portion and the lower portion of the outer sleeve through the connecting screws. The special hole is arranged at the base part of the outer sleeve and is used for placing a limit short pin, a straight spring and a screwing screw, and the limit short pin is used for limiting the position of the tubular shifting pin, so that a user does not need to press the shifting pin all the time and sufficient operation time and space are provided for taking out the inner sleeve. The utility model discloses can realize the quick assembly disassembly of inside and outside sleeve, can accomplish the circumference and the axial locking of inside and outside sleeve simultaneously, centering nature between the two is good, and the location is quick, accurate, and the closure mode is simple reliable, can practice thrift the operation time when guaranteeing operation safety.

Description

Detachable double-layer sleeve for intervertebral foramen mirror operation

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a intervertebral foramen mirror operation is used can dismantle double-deck sleeve pipe.

Background

The intervertebral foramen mirror operation is an operation that an endoscope enters a human body through a minimally invasive operation pore canal which is opened in advance, and the visual field provided by the endoscope in the human body is used for guiding a doctor to complete operations of removing prominent lesion tissues, hyperplastic osteoporotic nerve tissues and the like. Because the operation completed by the intervertebral foramen mirror technology has small wound, good effect and quick postoperative rehabilitation, the intervertebral foramen mirror is widely applied to the treatment of patients by doctors at home and abroad.

However, in the existing endoscopic discectomy, delicate surgical instruments such as trephine and bone drill need to pass through the hole of the inner cannula to reach the lesion site of the human body, and the inner cannula is used in cooperation with the outer cannula. However, when the current inner and outer sleeves are used in a matched manner, the inner and outer sleeves have poor centering performance, the mounting mode is not simple and reliable enough, the requirement on the operation skill of an operator is high, and meanwhile, the disassembly is not convenient.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides a detachable double-layer sleeve for the transforaminal endoscopic surgery, which can complete the axial and circumferential locking of the inner and outer sleeves by matching a tubular shifting pin and a spring, has simple and reliable installation and can ensure better centering property; meanwhile, the limiting device is arranged, so that an operator can take out the inner sleeve with sufficient time and operation space, and the working efficiency is improved on the basis of ensuring the operation safety.

The utility model discloses a realize through following technical scheme: a detachable double-layer sleeve for an intervertebral foramen mirror operation comprises an outer sleeve and an inner sleeve, wherein the outer sleeve is of a split structure and comprises an outer sleeve end cover, an outer sleeve base and a tubular shifting pin, the outer sleeve base comprises a main body, a limiting short pin, a straight spring and a screwing screw, a special hole, a spring cavity and a tubular groove are formed in the main body, the limiting short pin is arranged in the special hole and in clearance fit with the special hole, the straight spring is installed in the spring cavity, and the screwing screw is installed in the special hole; the tubular shifting pin is arranged in a tubular passage formed by the outer sleeve end cover and the outer sleeve base, the axis of the tubular shifting pin is circular arc, the section of the tubular shifting pin is circular, the tail end of the tubular shifting pin is a cylindrical convex column with small diameter, a shifting handle is arranged on the outer side of the tubular shifting pin, the upper half part of the shifting handle is circular arc-shaped, the lower half part of the shifting handle is trapezoidal, and the shifting handle is exposed out of the main body; the tubular shifting pin further comprises a bending spring, the bending spring is arranged in the tubular groove, the first end of the bending spring is sleeved on the cylindrical convex column, and the second end of the bending spring abuts against the inner end face of the tubular groove; the inner sleeve and the outer sleeve are in sliding connection, the inner sleeve comprises an inner sleeve handle, an axial through hole is formed in the inner sleeve handle, and a circumferential through hole matched with the tubular shifting pin is formed in the side wall of the inner sleeve.

Preferably, the inner sleeve handle corresponds to a notch of the outer sleeve end cover, the axis of the axial through hole coincides with the axis of the outer sleeve end cover, the inner sleeve is in clearance fit with the main body, and the tubular shifting pin is in clearance fit with the circumferential through hole.

Preferably, the outer tube end cover is provided with three counter bores and an outer tube end cover notch, the counter bores are arranged on an outer tube end cover circular arc central line, a first end of the outer tube end cover notch is circular, the circle center of the first end coincides with the center of the circumference of the outer tube end cover, a second end of the first end is rectangular-like, and two long edges of the first end are parallel to the central axis of the outer tube end cover and tangent to a circle close to one end of the center of the outer tube end cover notch.

Preferably, the limiting short pin is in a cylindrical boss shape, the diameter of the upper end of the limiting short pin is smaller than that of the lower end of the limiting short pin, the end face of the boss of the upper end of the limiting short pin abuts against the upper end face of the special hole, the first end of the straight spring abuts against the bottom face of the boss of the limiting short pin, the second end of the straight spring abuts against the bottom end of the screwing screw, the screwing screw is screwed into the special hole from the lower end of the outer sleeve base, the limiting short pin keeps a protruding state when not being extruded under the action of the straight spring, and the end face of the screwing screw is flush with the bottom face of the outer sleeve base.

Preferably, be equipped with in the main part three with the screw hole that the counter sink corresponds, connecting screw passes the counter sink and installs in the screw hole, connecting screw's up end and the up end parallel and level of outer tube end cover.

Preferably, the special hole and the spring cavity are coaxial and communicated, the upper end of the special hole is of an inverted countersunk structure, the lower end of the special hole is of a countersunk structure, and internal threads are processed in the middle of the upper end and the lower end of the special hole.

Preferably, the length of the inner sleeve is greater than that of the outer sleeve, and the inner sleeve handle is welded with the inner sleeve.

Compared with the prior art, the beneficial effects of the utility model are as follows:

(1) The utility model discloses can accomplish the axial and the circumference locking of inside and outside sleeve simultaneously, inside and outside sleeve cooperation axiality is good, and the installation is swift, accurate, guarantees operation safety, practices thrift the operation time.

(2) The utility model discloses in be equipped with stop device for the tubulose round pin, provide sufficient operating time and space for the operator, reduce the operation degree of difficulty.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the base structure of the outer sleeve;

FIG. 3 is a schematic view of the structure of an outer sleeve end cap;

FIG. 4 is a schematic view of the tubular deadbolt and the curved spring in an installed condition;

FIG. 5 is a schematic view of a tubular deadbolt construction;

FIG. 6 is a partial cross-sectional view of the tubular deadbolt with the bent spring installed;

FIG. 7 is a schematic partial cross-sectional view of an outer sleeve end cap base;

fig. 8 is a schematic view of the inner sleeve structure.

Reference numerals:

1. an outer sleeve; 2. an inner sleeve;

11. an outer sleeve end cap; 12. an outer casing base; 13. a tubular deadbolt;

111. countersinking; 112. an outer sleeve end cover notch;

121. a main body; 122. a short limit pin; 123. a straight spring; 124. a connecting screw; 125. specially manufacturing holes; 126. the outer sleeve base notch; 127. a tubular recess; 128. screwing the screw tightly;

131. a cylindrical convex column; 132. the handle is pulled; 133. a bending spring;

21. an inner sleeve handle; 22. an axial through hole; 23. a circumferential through hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The components of the embodiments of the present invention generally described and illustrated in the figures herein can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1, 2 and 3, the detachable sleeve under the transforaminal endoscope disclosed in this embodiment includes an outer sleeve 1 and an inner sleeve 2, wherein the outer sleeve 1 is a split structure and includes an outer sleeve end cap 11 and an outer sleeve base 12. The outer sleeve end cover 11 includes three counter bores 111 and an outer sleeve end cover notch 112, the outer sleeve base 12 is provided with three threaded holes corresponding to the counter bores 111 respectively, and an outer sleeve base notch 126 corresponding to the outer sleeve end cover notch 112, and the counter bores 111 and the corresponding threaded holes are connected and fastened through connecting screws 124.

As shown in FIG. 2, the outer sleeve base 12 further includes a tubular recess 127 for receiving the tubular pin 13, and a specially-made hole 125 for receiving the straight spring 123, the short limit pin 122, and the tightening screw 128.

As shown in fig. 4 and 5, the outer sleeve 1 further includes a tubular pin 13 and a bending spring 133 inside. The tubular pin 13 includes a cylindrical boss 131 at the end for facilitating the installation and positioning of the bending spring 133. In addition, the upper half of the tubular pin pulling handle 132 is set to be semicircular to satisfy the comfort of operation, and the lower half is set to be trapezoidal, and the inclination of the tubular pin pulling handle 132 can make the tubular pin pulling handle 132 more easily press the short limit pin 122, so as to complete the limit or cancel the limit action of the tubular pin pulling handle 13.

As shown in fig. 6 and 7, the outer sleeve 1 further comprises a short limit pin 122, a straight spring 123 and a tightening screw 128. The limit short pin 122 is installed in the special hole 125 and is in clearance fit with the main body 121, the end surface of the boss at the upper end of the limit short pin 122 is pressed against the upper end surface of the special hole 125, the straight spring 123 is pressed against the bottom surface of the boss of the limit short pin 122, the other end is pressed against the bottom end of the screwing screw 128, and the screwing screw 128 is screwed into the special hole 125 from the lower end of the outer sleeve base 12. Under the action of the straight spring 123, the short limit pin 122, when not pressed, will remain in a convex state for limiting the tubular pin 13, so that the user does not need to hold the pin all the time, and sufficient operation time and space are provided for the operator to remove the inner sleeve 2.

In order to ensure that the outer sleeve end cover 11 is not separated from the outer sleeve base 12 in the surgical process, the outer sleeve 1 further comprises a connecting screw 124, a threaded hole corresponding to the countersunk hole 111 is formed in the main body 121, the connecting screw 124 penetrates through the countersunk hole 111 and is installed in the threaded hole, and the upper end face of the connecting screw 124 is flush with the end face of the outer sleeve end cover 11.

As shown in fig. 8, the inner sleeve 2 has a circumferential through hole 23 adapted to the tubular pin 13, and the front end of the tubular pin 13 passes through the circumferential through hole 23 and enters the tubular groove 127, so as to lock the inner sleeve 2. The inner sleeve 2 also comprises a handle 21 for an operator to take out the inner sleeve 2, and the upper end surface of the handle 21 is also provided with an axial through hole 22 for placing other transforaminal endoscopic surgical tools in subsequent operations.

The utility model discloses assembly and operating method as follows:

(1) Before use, the tubular shifting pin 13, the bending spring 133 and the outer sleeve end cover 11 are firstly placed in the tubular groove 127, then the outer sleeve end cover 11 is placed on the outer sleeve base 12, and the outer sleeve end cover 11 and the outer sleeve base 12 are locked together under the action of the connecting screw 124;

(2) Then the outer sleeve 1 is inverted, the limit short pin 122 and the straight spring 123 are sequentially placed in the special hole 125, and finally the screw 128 is screwed in. So far, the installation operation before the use of the outer sleeve 1 is finished;

(3) When the tubular shifting pin handle 132 is shifted by a hand, the tubular shifting pin 13 slides along the tubular groove 127 and compresses the bending spring 133, when the tubular shifting pin handle 132 presses the limit short pin 122, the limit short pin 122 axially slides along the hole wall of the special hole 125 and compresses the straight spring 123, and after the shifting pin handle 132 presses the limit short pin 122, the limit short pin 122 rapidly recovers to the original position under the elastic action of the straight spring 123, so that the limit of the shifting pin handle 132 is completed. At the moment, the inner sleeve 2 can be sleeved into the aperture of the outer sleeve 1, the inner sleeve handle 21 passes through the end cover notch 112 of the outer sleeve and leans against the upper end face of the hole wall of the outer sleeve 1, and the inner sleeve 2 and the outer sleeve 1 are coaxially matched;

(4) Then, the pin pulling handle 132 is pulled by hand until it presses the short limit pin 122 for another time, at this time, the short limit pin 122 no longer has a limit effect on the tubular pin 13, the tubular pin 13 will slide rapidly along the tubular groove 127 under the elastic force of the bending spring 133, pass through the inner sleeve circumferential through hole 23 and enter the other side of the tubular groove 127, and complete the locking of the inner sleeve 2;

(5) The removal of the inner jacket tube 2 is carried out by repeating the above-described operations.

The utility model can realize the detachability of the inner and outer sleeves, and can realize the circumferential and axial locking of the inner and outer sleeves at the same time; the coaxiality of the inner sleeve and the outer sleeve is good, the installation and the disassembly are convenient, the positioning is quick and accurate, the operation safety is ensured, and the operation time is saved.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes can be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. It is noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

Claims (7)

1. A detachable double-layer sleeve for an intervertebral foramen mirror operation comprises an outer sleeve and an inner sleeve, and is characterized in that,

the outer sleeve is of a split structure and comprises an outer sleeve end cover, an outer sleeve base and a tubular shifting pin, wherein the outer sleeve base comprises a main body, a limiting short pin, a straight spring and a screwing screw, the main body is provided with a special hole, a spring cavity and a tubular groove, the limiting short pin is arranged in the special hole, the limiting short pin and the special hole are in clearance fit, the straight spring is arranged in the spring cavity, and the screwing screw is arranged in the special hole;

the tubular shifting pin is placed in a tubular passage formed by the outer sleeve end cover and the outer sleeve base, the axis of the tubular shifting pin is arc, the section of the tubular shifting pin is circular, the tail end of the tubular shifting pin is a small-diameter cylindrical convex column, a shifting handle is arranged on the outer side of the tubular shifting pin, the upper half part of the shifting handle is arc-shaped, the lower half part of the shifting handle is in a trapezoidal shape, and the shifting handle is exposed out of the main body;

the tubular shifting pin further comprises a bending spring, the bending spring is arranged in the tubular groove, the first end of the bending spring is sleeved on the cylindrical convex column, and the second end of the bending spring abuts against the inner end face of the tubular groove;

the inner sleeve is in sliding connection with the outer sleeve, the inner sleeve comprises an inner sleeve handle, an axial through hole is formed in the inner sleeve handle, and a circumferential through hole matched with the tubular shifting pin is formed in the side wall of the inner sleeve.

2. The detachable double-layer sleeve for the endoscopic discectomy of claim 1, wherein the inner sleeve handle corresponds to a notch of an outer sleeve end cap, an axis of the axial through hole coincides with an axis of the outer sleeve end cap, the inner sleeve is in clearance fit with the main body, and the tubular poking pin is in clearance fit with the circumferential through hole.

3. The detachable double-layer sleeve for the endoscopic discectomy according to claim 2, wherein the outer sleeve end cap is provided with three counter bores and an outer sleeve end cap notch, the counter bores are arranged on a center line of an arc of the outer sleeve end cap, a first end of the outer sleeve end cap notch is circular, the center of the first end coincides with the center of the circumference of the outer sleeve end cap, a second end of the outer sleeve end cap notch is rectangular-like, and two long sides of the second end of the outer sleeve end cap are parallel to the central axis of the outer sleeve end cap and tangent to a circle at one end of the outer sleeve end cap notch close to the center.

4. The detachable double-layer sleeve for the endoscopic discectomy of claim 2, wherein the short limit pin is shaped like a cylindrical boss, the diameter of the upper end of the short limit pin is smaller than that of the lower end of the short limit pin, the end surface of the boss at the upper end of the special hole abuts against the upper end surface of the special hole, the first end of the straight spring abuts against the bottom surface of the boss of the short limit pin, the second end of the straight spring abuts against the bottom end of the screw, the screw is screwed into the special hole from the lower end of the outer sleeve base, the short limit pin keeps a convex state when not being squeezed under the action of the straight spring, and the end surface of the screw is flush with the bottom surface of the outer sleeve base.

5. The detachable double-layer sleeve for the endoscopic discectomy is characterized in that the main body is provided with three threaded holes corresponding to the counter bores, connecting screws penetrate through the counter bores and are installed in the threaded holes, and the upper end faces of the connecting screws are flush with the upper end face of the outer sleeve end cover.

6. The detachable double-layer sleeve for the endoscopic discectomy of claim 4, wherein the special hole is coaxial and communicated with the spring cavity, the upper end of the special hole is arranged in a reversed countersunk structure, the lower end of the special hole is arranged in a countersunk structure, and an internal thread is processed between the upper end and the lower end.

7. The detachable double-layered cannula for endoscopic discectomy according to claim 1, wherein the length of the inner cannula is greater than the length of the outer cannula, and the inner cannula handle is welded to the inner cannula.

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