CN112641474A - Medical retractor - Google Patents

Abstract

The invention provides a medical retractor, which comprises a tissue retractor, a transition pipe and a push-pull mechanism, wherein the tissue retractor comprises convex wings and movable pieces which are suitable for being mutually opened and closed, in the expanding process, the tissues can enter the interval formed after the convex fins and the movable sheets are expanded, when the convex wings and the movable sheets are closed, the tissues entering the interval can be clamped and fixed, the tissue draw hook can be separated relative to the transition pipe, the separable structure enables the tissue drag hook to realize separation and release relative to the transition pipe after clamping the tissue, namely, in the process of clamping the tissue, only the tissue draw hook needs to be used independently without keeping the tissue draw hook, the transition pipe, the inhaul cable and other structures in a continuous matching state, the transition pipe, the notch pull rod and the inhaul cable can be repeatedly used for realizing the operation of different tissue draw hooks.

Description

Medical retractor

Technical Field

The invention relates to the technical field of medical treatment, in particular to a medical retractor.

Background

In the operation process of operating the endoscope, the front end of the endoscope is easily covered and the visual field of an operator is affected due to the size problem of a focus, so that aiming at the existing problems, the medical retractor mainly used for fixing and pulling the tissues near the operation part is used for avoiding the tissues near the operation part from blocking the operation visual field.

For example, a tractable clipping device disclosed in publication No. CN208910333U is configured to clamp mucosa with a clipping clamp and release the clipping clamp to fix on the mucosa, and to control the mucosa to turn upward by drawing the rear end of a traction wire, so as to expose a lesion site under an operation view and draw the mucosa of a wound on one side to the opposite side, thereby realizing the closure of the wound. It should be noted that, this solution requires an additional traction wire for operation, which increases the operation difficulty for the operator and requires a relatively high operation skill for the operator.

Disclosure of Invention

The invention provides a medical retractor, which aims to solve the problem that the operation difficulty in the prior art is relatively high.

The medical retractor of the invention is realized as follows:

a medical retractor comprises a tissue retractor, a transition tube and a push-pull mechanism, wherein the tissue retractor comprises a fixing sleeve, the fixing sleeve comprises a body of a tubular structure with a hollow accommodating cavity and a convex wing which extends outwards from one end of the body along the longitudinal axis of the body; the clamping piece part comprises a movable piece and a connecting piece, wherein the movable piece is suitable for opening and closing relative to the convex wing, and the connecting piece is integrally connected with the movable piece and at least partially suitable for being folded into the hollow accommodating cavity;

the end part of the body, which is far away from the convex wing, is provided with a narrowing opening suitable for deformation, and the transition pipe is detachably connected with the narrowing opening;

the push-pull mechanism is suitable for pulling the connecting sheet of the tissue draw hook after penetrating through the transition pipe, and the push-pull mechanism is operated to enable at least part of the connecting sheet to be folded into the hollow accommodating cavity and enable the tissue draw hook to be separated from the medical retractor.

Furthermore, the push-pull mechanism comprises a connecting piece fixedly connected with one end, relatively far away from the movable piece, of the connecting piece, a notch pull rod which is suitable for moving along the axis of the body in the hollow accommodating cavity of the body and is clamped with the connecting piece, and a push-pull assembly which is connected with the notch pull rod and is suitable for pushing and pulling the notch pull rod.

Furthermore, the clamping piece part also comprises a flat plate part, one end of the connecting piece is connected with the movable piece, and the other end of the connecting piece is connected with the flat plate part;

when the movable plate is in an open state relative to the convex wing, the notch pull rod and the flat plate part are relatively fixed through the connecting piece;

when the push-pull mechanism is operated to enable the movable plate to be in a closed state relative to the convex wing, the gap pull rod is separated from the flat plate part and the connecting piece, and the connecting piece is kept fixedly connected with the flat plate part.

Further, the connecting piece is a rivet.

Furthermore, an opening through hole is arranged on the notch pull rod, and a notch communicated with the opening through hole is arranged on the side edge of the notch pull rod; the connecting piece is suitable for realizing the connection and the separation with the opening through hole through the gap.

Further, the push-and-pull subassembly includes the trombone slide that links firmly with the one end that the opening through-hole was kept away from to the breach pull rod, cup joints fixed cable with the one end that the trombone slide deviates from the breach pull rod to and be equipped with on the lateral wall of trombone slide be suitable for with the portion of strutting of the inner chamber wall butt of receipts slot.

Furthermore, when the movable sheet is in an opening state relative to the convex fin, one part of the opening part is slidably accommodated in the transition pipe, and the other part of the opening part is accommodated in the body;

when the movable sheet is in a closed state relative to the convex wing, the opening part is separated from the tissue drag hook, and the opening part is relatively fixed on the pull tube by the notch pull rod.

Furthermore, the push-pull assembly further comprises a locking clamping piece sleeved on the outer side of the notch pull rod, and the push-pull mechanism is operated to enable one end of the notch pull rod, provided with the opening through hole, to be abutted against the locking clamping piece to drive the locking clamping piece to axially slide.

Furthermore, the end part of the transition pipe far away from the fixed sleeve is connected with the spring pipe through a connecting pipe;

one end of the spring tube, which is far away from the transition tube, is connected with a core bar, and a slip ring is slidably sleeved on the core bar;

the tail end of the inhaul cable is fixedly connected with the sliding ring so as to be suitable for the sliding ring to pull the inhaul cable, and therefore the pulling operation of the push-pull mechanism is achieved.

Compared with the prior art, the medical retractor has the following beneficial effects: the medical retractor comprises a tissue retractor, a transition pipe and a push-pull mechanism, wherein a convex wing and a movable sheet of the tissue retractor are suitable for being opened and closed mutually, the tissue can enter an interval formed by the convex wing and the movable sheet after being opened in the opening process, the tissue entering the interval can be clamped and fixed when the convex wing and the movable sheet are closed, the tissue retractor can be separated relative to the transition pipe, the tissue retractor can be separated and released relative to the transition pipe after clamping the tissue by the aid of the separable structure, namely, in the process of clamping the tissue, the tissue retractor only needs to be used independently, the tissue retractor does not need to be kept in a continuous matching state together with structures such as the transition pipe, the notch pull rod and the pull cable, and when at least two tissue retractors are needed to be used for large tissue area, the transition pipe, the notch pull rod and the inhaul cable can be repeatedly used for realizing the operation of different tissue draw hooks.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic view of a tissue retractor provided in example 1 of the present invention;

FIG. 2 is a schematic view showing the structure of the fixing tube of the tissue retractor according to example 1 of the present invention;

FIG. 3 is a schematic view showing the structure of the movable plate and the connecting plate of the tissue retractor provided in example 1 of the present invention;

FIG. 4 is a schematic structural view showing the movable blade and the projecting wings of the tissue retractor provided in example 1 of the present invention in a closed state;

FIG. 5 is a schematic structural view showing the movable blade and the projecting wings of the tissue retractor provided in example 1 of the present invention in an open state;

fig. 6 shows a schematic structural view of a medical retractor provided in example 1 of the present invention;

FIG. 7 is a schematic cross-sectional view of the tissue retractor in combination with the transition tube and the pull tube of the present invention;

FIG. 8 is a schematic cross-sectional view of the tissue retractor of the present invention shown after tissue clamping and securing has been completed;

fig. 9, fig. 10, fig. 11 and fig. 12 show the tissue retractor according to the present embodiment in use during the process of clamping and fixing the tissue.

In the figure: the wing-shaped clamping device comprises a body 1, a hollow accommodating cavity 2, a base 3, a wing tip part 4, a transition pipe 5, a connecting sheet 6, a substrate 7, a wing part 8, an inserting part 10, a narrowing opening 11, a connecting piece 12, a notch pull rod 13, an opening through hole 15, a notch 16, a pull pipe 17, a pull rope 18, a grabbing part 19, an annular groove 20, a spreading part 21, a core rod 23, a locking clamping piece 24, a sliding ring 25, a connecting pipe 27, a spring pipe 28 and a stopping shaft 30.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

Example 1:

as shown in fig. 1 to 5, the present embodiment provides a tissue retractor 100, comprising: a retaining sleeve 101 and a clip portion 102 adapted to be partially collapsed within the retaining sleeve 101. In detail, the locking bushing 101 includes a body 1 having a tubular body structure with a hollow receiving cavity 2, and a convex fin 103 having an arc-shaped structure integrally formed with an axial end of the body 1. The clip portion 102 includes a movable piece 104 adapted to open and close relative to the protruding fin 103, and a connecting piece 6 integrally connected to the movable piece 104 and adapted to be drawn into the hollow accommodating cavity 2, where it should be noted that the connecting piece 6 of this embodiment is made of a material with certain deformation elasticity, and in addition, the tissue retractor 100 of this embodiment may be made of a metal material or a degradable material, which is not limited in this embodiment.

More specifically, the protruding fin 103 includes a base portion 3 extending from a radial edge of the body 1 along a longitudinal axis direction of the body 1, and a fin tip portion 4 integrally bent and formed at an end portion of the base portion 3 relatively far from the body 1; the wingtip part 4 is bent from the base part 3 toward the central axis direction of the body 1. The movable piece 104 includes a base sheet 7 adapted to extend in a direction parallel to the axis of the body 1, and a fin portion 8 formed by bending integrally the base sheet 7 and adapted to engage with the fin tip 4. The fin portion 8 is adapted to be opposed to the fin tip portion 4 to clamp tissue when the movable piece 104 is in a closed state with respect to the protruding fin 103. That is, as the connecting piece 6 is continuously retracted into the hollow accommodating cavity 2 of the body 1, the movable piece 104 gradually moves toward the protruding fin 103 to reduce the space between the movable piece 104 and the protruding fin 103.

Referring to fig. 7-8, the clip portion 102 further includes a flat plate portion 105, one end of the connecting piece 6 is connected to the movable piece 104, and the other end of the connecting piece 6 is connected to the flat plate portion 105. When the movable piece 104 is in an open state with respect to the protruding fin 103, the connecting piece 6 is spaced from the stopper shaft 30 by a predetermined distance, and the flat plate portion 105 is suspended in the hollow accommodating chamber 2, and when the movable piece 104 is in a closed state with respect to the protruding fin 103, the connecting piece 6 is in contact with the stopper shaft 30, and the movable piece 104 is in contact with the protruding fin 103, and one end of the flat plate portion 105 is in contact with the inner wall of the hollow accommodating chamber 2.

In view of improving the clamping effect of the movable blade 104 and the protruding fin 103 on the tissues, the wing portion 8 of the present embodiment is further provided with a catching portion 19 at the end portion adapted to face the fin tip portion 4. The grasping portion 19 can form a space for a portion of human tissue, such that the tissue can slide out of the tissue retractor 100 provided in this embodiment by entering a portion of the tissue into the space of the grasping portion 19. In this embodiment, the grasping portion 19 has a V-shaped or W-shaped groove.

In a further optional case, after the tissue retractor 100 clamps and fixes the human tissue, in order to facilitate the pulling of the human tissue, the efficiency of the pulling is improved, and at least one protruding insertion portion 10 suitable for being inserted into the human tissue is provided at a side end of the base portion 3 facing the movable piece 104; the insertion portion 10 is formed by bending relative to the base portion 3, and the insertion portion 10 is inclined towards the longitudinal central axis of the body 1, so that the tissue retractor 100 can be deeply matched with human tissues through the insertion portion 10.

In addition, for the connecting sheet 6 of the present embodiment, taking an optional implementation case as an example, the connecting sheet 6 is a Z-shaped structure, and a folding angle of the Z-shaped structure is in arc transition; and the connection part of the movable sheet 104 and the connecting sheet 6 is in arc transition, so that the movable sheet 104 and the connecting sheet 6 form an S-shaped body together, and under the structure, when the connecting sheet 6 is gradually retracted from the outside of the body 1 to the hollow accommodating cavity 2 of the body 1, the S-shaped structure can realize the movable sheet 104 connected with the connecting sheet 6 through deformation and move towards the direction of the convex fin 103, so that the convex fin 103 and the movable sheet 104 are gradually formed into a closed state from an open state.

In the tissue retractor 100 of the present embodiment, when the protruding fin 103 and the movable plate 104 are in the open state, the connecting plate 6 is partially located outside the hollow accommodating cavity 2 along with the movable plate 104, and when the connecting plate 6 gradually retracts into the hollow accommodating cavity 2, the movable plate 104 gradually moves toward the protruding fin 103 to reduce the distance between the movable plate 104 and the protruding fin 103, so as to finally realize the clamping of the protruding fin 103 and the movable plate 104 on the tissue of the human body.

Example 2:

referring to fig. 6 to 12, on the basis of the tissue retractor 100 of embodiment 1, the present embodiment provides a medical retractor, which includes the tissue retractor 100 of embodiment 1, a narrowing opening 11 integrally formed with an end portion of the body 1 of the tissue retractor 100 away from the protruding fin 103 and adapted to be deformed, a transition tube 5 detachably coupled to the narrowing opening 11, and a push-pull mechanism adapted to pull the connecting piece 6 of the tissue retractor 100 after passing through the transition tube 5.

In detail, referring to fig. 3, 6 and 7, the push-pull mechanism includes a connecting piece 12 fixedly connected to an end of the connecting piece 6 away from the movable piece 104, a notched pull rod 13 adapted to move along the axis of the body 1 in the hollow accommodating cavity 2 of the body 1 and engaged with the connecting piece 12, and a push-pull assembly connected to the notched pull rod 13 and adapted to push and pull the notched pull rod 13.

Wherein, the notch pull rod 13 is provided with an opening through hole 15, the side edge of the notch pull rod 13 is provided with a notch 16 communicated with the opening through hole 15, and the central axis of the opening through hole 15 is vertical to the longitudinal axis of the notch pull rod 13; the connecting member 12 is adapted to be engaged with and disengaged from the open through hole 15 through the gap 16. The attachment member 12 herein is in the form of, for example, but not limited to, a rivet.

In addition, the push-pull assembly comprises a pull pipe 17 fixedly connected with one end of the notch pull rod 13 far away from the opening through hole 15, a pull cable 18 fixedly sleeved with one end of the pull pipe 17 far away from the notch pull rod 13, and a stretching part 21 which is arranged on the outer side wall of the pull pipe 17 and is suitable for being abutted against the inner cavity wall of the narrowing opening 11; wherein the narrowing opening 11 is provided with at least one notch along the direction parallel to the axis of the body 1; the transition pipe 5 is sleeved with the opening part 21, specifically, a part of the opening part 21 is slidably accommodated in the transition pipe 5, and the other part of the opening part 21 is accommodated in the body 1, and the narrowing opening 11 is suitable for being deformed under the action of the opening part 21 to realize the separation of the narrowing opening 11 and the opening part 21. That is, due to the structure of the notch, the inner diameter of the narrowing 11 can be changed under deformation, so that the separation from the expanding portion 21, that is, the separation of the body 1 from the transition pipe 5, can be realized by the deformation of the narrowing 11.

It should be further particularly noted that an annular groove 20 of an annular structure is provided on an outer side wall of the opening portion 21, where the annular groove 20 is used for forming a fit with the narrowing opening 11, and the fit here is for a case where the movable piece 104 is in an open state relative to the protruding fin 103, and along with a process that the movable piece 104 and the protruding fin 103 are gradually closed, when the opening portion 21 gradually moves in a direction away from the fixed sleeve 101 along with the pull pipe 17 under the action of the pull cable 18, the narrowing opening 11 will also be separated from the annular groove 20, so that other outer side wall portions on the opening portion 21 form an opening effect for the narrowing opening 11, and the narrowing opening 11 is deformed.

Furthermore, the end of the transition pipe 5 remote from the fixed sleeve 101 is connected to the spring pipe 28 by a connecting pipe 27; one end of the spring tube 28, which is far away from the transition tube 5, is connected with a core bar 23, and a slip ring 25 is slidably sleeved on the core bar 23; the tail end of the pulling cable 18 is fixedly connected with the sliding ring 25 so as to be suitable for pulling the pulling cable 18 by the sliding ring 25. That is to say, through pulling the sliding ring 25, when the sliding ring 25 moves to the end far away from the spring tube 28 along the core rod 23, the sliding ring 25 drives the cable 18, and then the cable 18 moves to the direction far away from the fixed sleeve 101 for the notch pull rod 13, in the moving process, the opening part 21 gradually moves to the direction far away from the fixed sleeve 101, when the opening part 21 moves to the narrowing opening 11, under the effect of the opening part 21, the narrowing opening 11 deforms to enlarge the inner diameter of the narrowing opening 11, so that the separation effect can be formed between the narrowing opening 11 and the opening part 21.

After the tissue retractor 100 is separated from the notched pull rod 13 and the transition tube 5, that is, the notched pull rod 13 is separated from the connecting piece 6, the pulling action of the notched pull rod 13 on the connecting piece 6 is correspondingly eliminated, in order to keep the clamping state of the movable sheet 104 and the convex fin 103 on the human tissue under the condition, the state change between the movable sheet 104 and the convex fin 103 can not occur due to the elimination of the action of the notched pull rod 13, the medical retractor of the embodiment comprises a stop shaft 30 arranged at a port close to the base 3 in the hollow accommodating cavity 2 along the radial direction of the body 1, and the stop shaft 30 is fixedly connected with the side wall of the body 1 to keep the position stability of the stop shaft 30 relative to the hollow accommodating cavity 2; after the connecting piece 6 is folded into the hollow accommodating cavity 2, the side end face of the connecting piece 6 departing from the notch pull rod 13 is suitable for abutting against the stop shaft 30. The connecting piece 6 and the protruding fin 103 are separated on both sides of the body 1 by the stopper shaft 30. During the process of clamping and fastening the tissue, the stop shaft 30 acts as a fulcrum, and the integrally connected movable piece 104 is relatively stabilized by stabilizing the connecting piece 6 and the flat plate portion 105 in the hollow accommodating cavity 2.

Specifically, as the movable plate 104 and the connecting plate 6 form an S-shaped body together, in the process that the connecting plate 6 gradually shrinks into the hollow accommodating cavity 2, the connecting plate 6 will generate a certain amount of extrusion deformation so that the portion of the connecting plate 6 located outside the hollow accommodating cavity 2 is easy to shrink into the hollow accommodating cavity 2, and after the connecting plate 6 completely enters the hollow accommodating cavity 2, the arc transition at the joint of the movable plate 104 and the connecting plate 6 will abut against the port of the hollow accommodating cavity 2 near the body 1, and the connecting plate 6 will properly recover its shape, so that the portion of the connecting plate 6 of the L-shaped structure near the movable plate 104 will abut against the stop shaft 30 from one side of the hollow accommodating cavity 2, and in combination with the stop of the stop shaft 30 on the portion of the L-shaped structure 6 near the movable plate 104 and the arc transition at the joint of the movable plate 104 and the connecting plate 6 and the port of the hollow accommodating cavity 2, the movable plate 104 and the connecting plate 6 are kept abutting against each other The stability of the state in which the human tissue is held between the projecting fins 103 is not changed by the loss of the action of the notched tension bar 13 on the connecting piece 6.

The specific implementation principle of the medical retractor of the embodiment is as follows:

the sliding ring 25 is pulled in a direction away from the fixed sleeve 101, so that the pulling cable 18 and the pulling tube 17 are driven to move axially, specifically, the pulling cable 18 and the pulling tube 17 are welded, and the pulling tube 17 and the notch pulling rod 13 are welded and fixed, so that the notch pulling rod 13 synchronously moves axially relative to the body 1 of the fixed sleeve 101 due to the axial movement of the pulling tube 17. Namely, in the process of pulling the sliding ring 25, the movable plate 104 is transited from the open state to the closed state relative to the convex fins 103, so that the convex fins 103 and the movable plate 104 can be aligned with the tissue part of the human body to be clamped and fixed for clamping and fixing. After the clamping of the human tissue is finished, the sliding ring 25 is continuously pulled, the locking clamping piece 24 is sleeved on the outer side of the gap pull rod 13, after the locking clamping piece 24 is pulled by the gap pull rod 13, one end of the gap pull rod 13, which is provided with the opening through hole 15, is abutted with the locking clamping piece 24 to drive the locking clamping piece 24 to axially slide, the locking clamping piece 24 is abutted with one end of the opening part 21, which is positioned in the body 1, and at the moment, the locking clamping piece 24 is in surface contact with the opening part 21, so that the pulling stability can be improved, and in the process of continuously applying axial tension, the notch 16 of the gap pull rod 13 is deformed, so that the gap pull rod 13 is separated from the connecting piece 12; then, the sliding ring 25 is pulled continuously, the opening portion 21 opens the narrowing opening 11 of the fixed sleeve 101, so that the inner diameter of the narrowing opening 11 is increased, and the separation between the opening portion 21 and the body 1 of the fixed sleeve 101 is realized, so that the tissue retractor 100, the notch pull rod 13 and the transition pipe 5 can be separated.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

It should be 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.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to 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.

Claims (9)

1. A medical retractor comprises a tissue retractor, a transition tube and a push-pull mechanism, and is characterized in that the tissue retractor comprises a fixing sleeve, the fixing sleeve comprises a body of a tubular structure with a hollow accommodating cavity, and a convex wing extending outwards from one end of the body along the longitudinal axis of the body; the clamping piece part comprises a movable piece and a connecting piece, wherein the movable piece is suitable for opening and closing relative to the convex wing, and the connecting piece is integrally connected with the movable piece and at least partially suitable for being gathered in the hollow accommodating cavity;

the end part of the body, which is far away from the convex wing, is provided with a narrowing opening suitable for deformation, and the transition pipe is detachably matched with the narrowing opening;

the push-pull mechanism is suitable for pulling the connecting sheet of the tissue retractor after penetrating through the transition pipe, and the push-pull mechanism is operated to enable the connecting sheet to be at least partially folded into the hollow accommodating cavity and enable the tissue retractor to be separated from the medical retractor.

2. The medical retractor of claim 1, wherein the push-pull mechanism comprises a connecting piece fixedly connected with one end of the connecting piece opposite to the end far away from the movable piece, a notched pull rod adapted to move along the axis of the body in the hollow accommodating cavity of the body and clamped with the connecting piece, and a push-pull assembly connected with the notched pull rod and adapted to push and pull the notched pull rod.

3. The medical retractor of claim 2, wherein said clip portion further comprises a flat plate portion, one end of said connecting piece is connected to said movable piece, and the other end of said connecting piece is connected to said flat plate portion;

when the movable plate is in an open state relative to the convex wing, the gap pull rod and the flat plate part are relatively fixed through the connecting piece;

when the push-pull mechanism is operated to enable the movable sheet to be in a closed state relative to the protruding wings, the gap pull rod is separated from the flat plate part and the connecting piece, and the connecting piece is fixedly connected with the flat plate part.

4. The medical retractor of claim 3 wherein said connector is a rivet.

5. The medical retractor according to claim 3, wherein the notched pull rod is provided with an open through hole, and the side edge of the notched pull rod is provided with a notch communicated with the open through hole; the connecting piece is suitable for being connected with and separated from the opening through hole through the gap.

6. The medical retractor according to claim 5, wherein the push-pull assembly comprises a pull tube fixedly connected with one end of the notched pull rod away from the open through hole, a pull cable fixedly sleeved with one end of the pull tube away from the notched pull rod, and a stretching portion arranged on the outer side wall of the pull tube and adapted to abut against the inner cavity wall of the narrowing opening.

7. The medical retractor of claim 6 wherein when said movable flap is in an open position relative to said protruding fin, a portion of said spreader portion is slidably received in said transition tube and another portion of said spreader portion is received in said body;

when the movable sheet is in a closed state relative to the convex wings, the opening part is separated from the tissue draw hook, and the opening part is relatively fixed on the pull tube by the notch pull rod.

8. The medical retractor according to claim 6, wherein the push-pull assembly further comprises a locking clip sleeved outside the notch pull rod, and when the push-pull mechanism is operated, the end of the notch pull rod, where the opening through hole is arranged, is abutted against the locking clip to drive the locking clip to slide axially.

9. The medical retractor of any of claims 1 to 8 wherein the end of the transition tube distal to the fixed sleeve is connected to the spring tube by a connecting tube;

one end of the spring tube, which is far away from the transition tube, is connected with a core bar, and a sliding ring is slidably sleeved on the core bar;

the tail end of the inhaul cable is fixedly connected with the sliding ring so as to be suitable for being pulled by the sliding ring, and therefore the pulling operation of the push-pull mechanism is achieved.

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