CN215227964U

CN215227964U - Internal expanding sleeve

Info

Publication number: CN215227964U
Application number: CN202120154936.5U
Authority: CN
Inventors: 王振海; 王峻晨
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-01-20
Filing date: 2021-01-20
Publication date: 2021-12-21
Anticipated expiration: 2031-01-20

Abstract

The utility model relates to an internal expanding sleeve, which belongs to the field of medical instruments. The inner expansion sleeve comprises an inner sleeve, an outer sleeve and a power-assisted screw cap, and the inner sleeve and the outer sleeve are both provided with a tube head end and a tube tail end; the inner sleeve is hollow, the tube head end of the inner sleeve is of an outwards-expanded bell mouth structure, the outer wall of the tube tail end of the inner sleeve is provided with an external thread, and the power-assisted screw cap is provided with an internal thread matched with the external thread; the outer sleeve is hollow inside and sleeved outside the inner sleeve, the outer sleeve is provided with side holes, longitudinal notches are formed in the outer sleeve in an extending mode along the side holes towards the end of the tube head of the outer sleeve, expansion blades are formed on the tube wall between every two adjacent longitudinal notches, and the inner sleeve is driven to move through the rotary power-assisted screw cap to enable the expansion blades to radially expand or close. The utility model discloses in endoscope operation process, under the notched prerequisite of skin not expanding, utilize interior expansion sleeve pipe from internal expand the soft tissue around the operating space, can expand scope operation field of vision, shelter from under the reduction soft tissue mirror.

Description

Internal expanding sleeve

Technical Field

The utility model relates to an internal expanding sleeve, which belongs to the technical field of medical instruments.

Background

At present, various working canulas used in the spinal endoscopic surgery process adopt gradual expansion to reach the required under-endoscope working space according to different inner diameters. The inner diameter of the existing various cannulas is invariable, and in the clinical operation process, if the inner diameter of the cannula is too small, the situation that the soft tissue under the endoscope blocks the operation visual field is often encountered; if the inner diameter is too large, the incision in the skin needs to be lengthened or enlarged, causing greater trauma to the patient.

When the working cannula is used clinically, when the inner diameter of the working cannula is small, an incision is small in the operation process, and the injury to a patient is small, but an operator can spend a large amount of time for cleaning soft tissues blocking the visual field, and meanwhile, the operation space under the endoscope is small, the visual field is small, and the working efficiency is low; when the inner diameter of the working sleeve is increased, the incision is enlarged and the injury is increased in the operation process, which contradicts the minimally invasive concept and causes more side injuries to patients.

Disclosure of Invention

The utility model aims at providing a sleeve pipe for internal local expansion, under the prerequisite that does not enlarge the skin incision, expand the sleeve pipe in utilizing and expand the soft tissue around the operating space to around expanding around from internal to, enlarge operating space under the mirror to improve work efficiency, soft tissue around through the expansion simultaneously can also produce the hemostasis by compression effect. After the operation is finished, the sleeve can be conveniently taken out.

In order to solve the above-mentioned purpose, the utility model adopts the following technical scheme:

an inner expansion sleeve comprises an inner sleeve, an outer sleeve and a power-assisted screw cap, wherein both the inner sleeve and the outer sleeve are provided with a pipe head end and a pipe tail end; the inner sleeve is hollow, the tube head end of the inner sleeve is of an outwards-expanded bell mouth structure, the outer wall of the tube tail end of the inner sleeve is provided with an external thread, and the power-assisted screw cap is provided with an internal thread matched with the external thread; the outer sleeve is hollow inside and sleeved outside the inner sleeve, the outer sleeve is provided with side holes, longitudinal notches are formed in the outer sleeve in an extending mode along the side holes towards the end of the tube head of the outer sleeve, expansion blades are formed on the tube wall between the longitudinal notches, and the inner sleeve is driven to move through the rotary power-assisted screw cap to enable the expansion blades to radially expand or close.

In the above technical solution, further, the length of the inner cannula is 10-20mm longer than the length of the outer cannula.

In the above technical solution, further, the inner dilating sleeve further comprises a positioning ring, and the positioning ring is connected with the outer sleeve.

In the above technical scheme, further, the outer sleeve pipe tail end is provided with a clamping groove, and the positioning ring is connected with the outer sleeve through the clamping groove.

In the above technical solution, further, the expansion angle range of the expansion leaves is 5 to 45 °.

In the above technical solution, further, the outer diameter of the front end of the bell mouth is 13-15mm, and the length of the external thread is 40-60 mm.

In the above technical solution, further, the length of the longitudinal cut is 20-40 mm.

In the above technical solution, further, the outer diameter of the front end of the bell mouth is 3-5mm longer than the inner diameter of the outer sleeve.

In the above technical solution, further, the front end of the bell mouth is a guide inclined plane with a certain taper.

The utility model discloses a theory of operation does: the outer sleeve is sleeved outside the inner sleeve, when the power-assisted screw cap is rotated, the tube head end of the outer sleeve moves to the tube head end of the inner sleeve, the expansion leaves simultaneously expand radially in the moving process of the outer sleeve, when the tube head end of the outer sleeve reaches the tube head end of the inner sleeve, the power-assisted screw cap is continuously rotated to drive the inner sleeve to move to the tail end of the outer sleeve, and meanwhile, the expansion leaves of the outer sleeve further expand to enable the outer sleeve to generate expansion effect in vivo; when the power-assisted screw cap is reversely rotated, the inner sleeve moves towards the tube head end of the outer sleeve, and the expansion leaves of the outer sleeve are closed.

The utility model discloses beneficial effect does:

(1) the utility model discloses in endoscope operation process, under the notched prerequisite of skin not expanding, utilize interior expansion sleeve pipe from internal to expand the soft tissue around the operation space, can expand the scope under the operation field of vision, reduce under the soft tissue mirror the field of vision and shelter from, make have sufficient operation space under the mirror.

(2) The utility model can expand from the body to extrude the soft tissue and stop bleeding by compression.

(3) The utility model discloses an outer tube is from internal expansion, can produce automatic fixed action to the outer tube in the operation process, prevents outer tube offset or extracts.

Drawings

FIG. 1 is a schematic structural view of an inner expandable casing in which (a) is a perspective view; (b) is a front view, and (c) is an A-A sectional view;

FIG. 2 is a schematic structural view of the inner sleeve;

FIG. 3 is a schematic structural view of the outer sleeve;

fig. 4 is a schematic structural view of the power nut, in which (a) is a perspective view, (b) is a front view, and (c) is a top view;

fig. 5 is a schematic structural diagram of the positioning ring, in which (a) is a perspective view, (b) is a front view, and (c) is a top view.

Wherein: 1. an inner sleeve; 2. a tube head end of the inner sleeve; 3. the tail end of the inner sleeve; 4. an outer sleeve; 5. the tube head end of the outer sleeve; 6. the tube tail end of the outer sleeve; 7. a power-assisted screw cap; 8. a longitudinal cut; 9. a positioning ring; 10. expanding the leaves; 11. a card slot; 12. a bell mouth; 13. an external thread; 14. side holes.

Detailed Description

The following non-limiting examples will allow one of ordinary skill in the art to more fully understand the present invention, but do not limit the invention in any way.

An inner expanding sleeve is structurally shown in figures 1-5 and comprises an inner sleeve 1, an outer sleeve 4 and a power-assisted screw cap 7, wherein both the inner sleeve 1 and the outer sleeve 4 are provided with a tube head end and a tube tail end, the inner sleeve 1 is hollow, the tube head end 2 of the inner sleeve 1 is in an outwardly expanding bell mouth 12 structure, the outer wall of the tube tail end 3 of the inner sleeve 1 is provided with an external thread 13, and the power-assisted screw cap 7 is provided with an internal thread matched with the external thread 13; the outer sleeve 4 is made of stainless steel materials which have good biocompatibility and ductility and do not contain harmful components to human bodies, the inner sleeve is hollow and sleeved outside the inner sleeve 1, the length of the inner sleeve 1 is 10-20mm longer than that of the outer sleeve 4, the outer sleeve 4 is provided with a side hole 14, a longitudinal cut 8 is arranged along the side hole 14 and extends towards the tube head end 5 of the outer sleeve, an expansion blade 10 is formed on the tube wall between the adjacent longitudinal cuts 8, and the inner sleeve 1 is driven to move by rotating the power-assisted screw cap 7 so that the expansion blade 10 radially expands or closes; the outer diameter of the front end of the bell mouth 12 is 13-15mm, the length of the external thread 13 is 40-60mm, and the length of the longitudinal cut 8 is 20-40mm, so that the expansion angle range of the expansion blade 10 is 5-45 degrees; the outer diameter of the front end of the bell mouth 12 is 3-5mm larger than the inner diameter of the outer sleeve 4; the inner expanding sleeve further comprises a positioning ring 9, a clamping groove 11 is formed in the tail end 6 of the outer sleeve 4, and the positioning ring 9 is connected with the outer sleeve 4 through the clamping groove 11 in the tail end 6 of the outer sleeve 4.

When the internal expansion sleeve is used, firstly, the inner sleeve 1 is inserted into a patient body along a guide tube or a guide rod, after the internal expansion sleeve reaches an operation target area, the outer sleeve 4 is sleeved outside the inner sleeve and is inserted into the patient body, the tube head end of the outer sleeve 4 moves towards the target area by rotating the power-assisted screw cap 7, the expansion leaves 10 expand radially simultaneously in the moving process of the outer sleeve 4, when the tube head end 5 of the outer sleeve 4 moves to be flush with the tube head end 2 of the inner sleeve 11, the outer sleeve 4 is fixed in the target area by the positioning ring 9, the power-assisted screw cap 7 is continuously rotated to drive the inner sleeve 1 to move towards the tube tail end 6 of the outer sleeve 4, and the expansion leaves 10 expand further simultaneously, so that the outer sleeve 4 generates an expansion effect in the body through the expansion leaves 10 to expand the visual field of an endoscope, and the operator can further operate the endoscope. After the operation is finished, the power-assisted screw cap 7 is rotated reversely, so that the inner sleeve 1 moves towards the tube head end 5 of the outer sleeve 4, the expansion leaves of the outer sleeve 4 are closed, the outer sleeve 4 is firstly pulled out of the body, and then the inner sleeve 1 is pulled out of the body.

Claims

1. An internal expansion sleeve, comprising: the inner expansion sleeve comprises an inner sleeve (1), an outer sleeve (4) and a power-assisted screw cap (7), and both the inner sleeve (1) and the outer sleeve (4) are provided with a tube head end and a tube tail end;

the inner sleeve (1) is hollow, the tube head end (2) of the inner sleeve (1) is of an outwards-expanded bell mouth (12) structure, an external thread (13) is arranged on the outer wall of the tube tail end (3) of the inner sleeve (1), and an internal thread matched with the external thread is arranged on the power-assisted screw cap (7);

the utility model discloses a pipe joint, including outer tube (4), outer tube (4) inside cavity, the suit is provided with side opening (14) outside interior sleeve pipe (1) on outer tube (4), extends along side opening (14) to the tube head end (5) of outer tube (4) and is provided with vertical incision (8), and the pipe wall between adjacent vertical incision (8) forms expansion leaf (10), drives interior sleeve pipe (1) through rotatory helping hand nut (7) and removes messenger expansion leaf (10) to radial expansion or closure.

2. The inner expandable sleeve according to claim 1, wherein: the length of the inner sleeve (1) is 10-20mm longer than that of the outer sleeve (4).

3. The inner expandable sleeve according to claim 2, wherein: the inner expanding sleeve further comprises a positioning ring (9), and the positioning ring (9) is connected with the outer sleeve (4).

4. The inner expandable sleeve according to claim 3, wherein: the outer sleeve (4) is provided with a clamping groove (11) at the tail end (6), and the positioning ring (9) is connected with the outer sleeve (4) through the clamping groove (11).

5. The inner expandable sleeve according to claim 4, wherein: the expansion angle of the expansion blade (10) is 5-45 degrees.

6. The inner expandable sleeve according to claim 5, wherein: the outer diameter of the front end of the bell mouth (12) is 13-15mm, and the length of the external thread (13) is 40-60 mm.

7. The inner expandable sleeve according to claim 6, wherein: the length of the longitudinal cut (8) is 20-40 mm.

8. The inner expandable sleeve according to claim 7, wherein: the outer diameter of the front end of the bell mouth (12) is 3-5mm longer than the inner diameter of the outer sleeve (4).

9. The inner expandable sleeve according to claim 8, wherein: the front end of the bell mouth (12) is a guide inclined plane with a certain taper.