CN114403956B - Heart tissue retractor - Google Patents

Abstract

The invention belongs to the technical field of medical devices, and in particular relates to a cardiac tissue retractor, which includes a non-injured clip for clamping the tissue at the heart incision at the proximal end, a fixed clip at the far end, and a traction rope connecting the two. The clamping position of the fixed clip and/or the atraumatic clip changes the pulling strength and pulling direction of the tissue at the heart incision; wherein, the atraumatic clip includes an upper clip body with an upper clamping part and a lower clamp body with a lower The lower clamping body of the clamping part, the upper clamping part and the lower clamping part are both arc-shaped plates and cooperate with each other, and they are all inclined to the side of the lower clamping body; the present invention can adjust the non-damaging clamp The pulling force and pulling direction of the tissue at the incision of the heart can be changed by the clamping position of the fixing clip, the position adjustment is convenient and fast, and at the same time, damage to the tissue can be avoided.

Description

A heart tissue retractor

technical field

The invention belongs to the technical field of medical instruments, in particular to a heart tissue retractor.

Background technique

In cardiac surgery, it is necessary to expose the aortic valve, left ventricular outflow tract, or structures in the left atrium (such as the left atrial appendage, mitral valve, etc.), or structures in the right atrium (such as the atrial septum, tricuspid valve, etc.) through various incisions. ), or pulmonary valve, right ventricular outflow tract and other structures.

The traditional method is to pull the incision by suturing the traction wire so that the operator can see the internal structure clearly, so as to perform the next operation. However, the method of suturing the traction thread needs to suture multiple sutures on the heart tissue, which is likely to cause damage to the heart tissue. In addition, as the operation progresses, the pulling direction and pulling force of the traction thread need to be adjusted at any time to better reveal Therefore, it is necessary to remove the traction line and adjust the traction position to re-sew the traction line, which will delay the operation time.

Contents of the invention

The purpose of the present invention is to provide a cardiac tissue retractor to solve the problems in the prior art that the sutured traction wire is easy to cause tissue damage, and the pulling direction and pulling force cannot be adjusted in time.

In order to achieve the above object, the present invention solves by the following technical solutions:

The present invention provides a cardiac tissue retractor, comprising a near-end non-injury clip for clamping the tissue at the incision of the heart, a distal fixing clip and a traction rope connecting the two, by adjusting the fixing clip and/or The clamping position of the atraumatic clip changes the pulling strength and pulling direction of the tissue at the heart incision;

Wherein, the non-damaging clamp includes an upper clamp body with an upper clamping portion and a lower clamping body with a lower clamping portion, the upper clamping portion and the lower clamping portion are both arc-shaped plates and cooperate with each other, And they are all inclined to the side of the lower clip body.

As a further technical solution, the traction rope is respectively hinged to the non-injury clip and the fixing clip.

As a further technical solution, the mating surfaces of the upper clamping part and the lower clamping part are provided with staggered protrusions.

As a further technical solution, the length of the pressing end of the lower clamp body is greater than the length of the pressing end of the upper clamp body, and the pressing end of the upper clamp body is hinged with a first catch, which is transferred to the lower clamp One side of the body closes the opening between the upper clip body and the lower clip body.

As a further technical solution, the fixed clip includes a fixed clip upper clip body and a fixed clip lower clip body, the pressing end of the fixed clip upper clip body is hinged with a second blocking piece, and the One side of the lower clip body of the fixing clip closes the opening between the upper clip body of the fixing clip and the lower clip body of the fixing clip, and an obtuse angle is formed between the first blocking piece and the upper clip body when closed.

As a further technical solution, the traction rope is hinged to the lower clip body and the lower clip body of the fixing clip respectively.

As a further technical solution, T-shaped shafts are provided at both ends of the traction rope, and are hinged to the lower clip body and the lower clip body of the fixing clip through the T-shaped shaft.

As a further technical solution, the end of the pressing end of the lower clip body of the fixing clip is provided with a bending blocking part and a rotating shaft installation part connected thereto, and a gap for engaging the second blocking piece is provided between the two, so The second blocking piece rotates and presses over the rotating shaft installation part and enters into the gap to engage.

As a further technical solution, the pressing end of the lower clip body is provided with a rotating shaft installation part, and the first blocking piece rotates and presses over the rotating shaft installation part to contact and engage with the lower clip body.

As a further technical solution, the direction of the generatrix of the arc-shaped plate is consistent with the direction of its inclination.

The above-mentioned beneficial effects of the present invention are as follows:

(1) The present invention is provided with a non-injury clip and a fixed clip connected by a traction rope, and the pulling strength and the pulling direction of the tissue at the heart incision can be changed by adjusting the clamp positions of the non-invasive clip and the fixed clip, and the position adjustment is convenient, fast and It can fully reveal the internal structure of the heart, which is convenient for the follow-up operation of the surgeon.

(2) The upper clamping part and the lower clamping part of the present invention are both arc-shaped plates and cooperate with each other. Since the arc-shaped plate clamping part can fit the heart incision tissue and has a large contact area, damage to the heart tissue can be avoided.

(3) The pressing end of the upper clip body of the present invention is hinged with a first baffle, and the opening between the upper clip body and the lower clip body is closed by the first baffle to the side of the lower clip body, so as to avoid suture lines during suturing during the operation. Enter the opening, and at the same time, it can quickly slide away the suture without entanglement with the non-traumatic clip, reducing the waste of valuable operation time; and, because the first block is hinged with the upper clip body, before the non-traumatic clip is clamped, it can be turned to the It does not affect its position to control the opening and closing of the clamping end.

Description of drawings

The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention, and the schematic embodiments of the present invention and their descriptions are used to explain the present invention, but not to limit the present invention. It should also be understood that the drawings are presented for simplicity and clarity and have not necessarily been drawn to scale. The invention will now be described and explained with additional features and details by use of the accompanying drawings, in which:

Fig. 1 shows a schematic diagram of the overall structure of the present invention;

Fig. 2 shows the front view of the non-damage clip structure of the present invention;

Fig. 3 shows the axonometric view of the clip body under the non-damage clip of the present invention;

Fig. 4 shows the front view of the fixing clip structure of the present invention;

FIG. 5 shows a partially enlarged view at A in FIG. 4 .

In the figure: 1. Non-damage clamp; 11. Upper clamp body; 12. Lower clamp body; 13. Upper clamping part; 14. Lower clamping part; 15. First stopper; 16. First torsion spring; 17 , the first T-shaped rotating shaft; 18, the protrusion; 2, the fixed clip; 21, the upper clip of the fixed clip; 22, the lower clip of the fixed clip; 23, the second stopper; 24, the second T-shaped rotating shaft; 25, The second torsion spring; 26, the rotating shaft installation part; 27, the bending blocking part; 3, the traction rope.

Detailed ways

The following will clearly and completely describe the technical solutions in the typical embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

As shown in Figure 1, a cardiac tissue retractor provided in this embodiment includes a non-invasive clip 1 at the proximal end for clamping the tissue at the incision of the heart, a fixed clip 2 at the distal end, and a traction rope 3 connecting the two , changing the pulling strength and pulling direction of the tissue at the heart incision by adjusting the clamping position of the fixing clip 2 and/or the atraumatic clip 1;

Among them, the non-injury clip 1 includes an upper clip body 11 with an upper clip part 13 and a lower clip body 12 with a lower clip part 14, the upper clip part 13 and the lower clip part 14 are both arc-shaped plates and cooperate with each other , and are all inclined to one side of the lower clip body 12, as shown in FIG. 2 .

It should be noted that at least two cardiac tissue retractors of the present invention should be used in conjunction with each other, and the positions of the cardiac tissue retractors should be arranged according to the needs of the operator to fully reveal the internal structure of the heart, thereby facilitating the operation of the operator.

The non-traumatic clip 1 and the fixed clip 2 connected by the traction rope 3 are set, and the pulling strength and the pulling direction of the tissue at the heart incision can be changed by adjusting the clamp positions of the non-traumatic clip 1 and the fixed clip 2. The position adjustment is convenient, fast and The internal structure of the heart can be fully exposed, which is convenient for the operator to perform subsequent operations; at the same time, the curved plate clamping part of the non-injury clip 1 can adapt to the incision tissue of the heart and has a large contact surface, which can avoid damage to the tissue.

The upper clamping part 13 and the lower clamping part 14 are arranged to be inclined to the side of the lower clamping body 12, which facilitates the pulling of the non-injured clamp 1 to the outside and exposes the internal structure of the heart. Usually, the value range of the included angle of inclination is 30°-90°.

It is not difficult to understand that the direction of the generatrix of the curved plate should be consistent with the direction of its inclination.

When in use, after the non-injury clamp 1 is clamped, since the heart is located inside the body and there is no fixed place inside, the fixed clamp 2 needs to be led out through the traction rope 3, and the fixed clamp 2 can be fixed on a single towel, or other devices that can be used for fixing It can be placed on supporting items. In order to facilitate the later disinfection and reuse, the non-damaging clip and the fixing clip can be made of stainless steel, and the traction rope can be made of soft steel wire, which is good for disinfection.

The clamping end of the fixing clip 2 can be provided with rubber blocks or teeth to increase the frictional force with supports such as a single towel.

Usually, the clip has an upper and a lower clip body and is hinged in the middle. The clamping force is maintained by a spring.

In this embodiment, as shown in Figure 2, the non-damaging clamp 1 includes an upper clamp body 11 and a lower clamp body 12, which are hinged in the middle, and the clamping force is maintained by a first torsion spring 16; as shown in Figure 4, the fixed clamp includes The upper clip body 21 of the fixing clip and the lower clip body 22 of the fixing clip are hinged in the middle, and the clamping force is maintained by the second torsion spring 25 .

Because the clip itself has an opening between the upper and lower clips at the pressing end in order to control the opening and closing of the clamping end, due to the small operating space, the suture thread is easy to enter the opening during the suture during the operation, and may be entangled with the clip. Or unwind or cut short and re-thread the suture, wasting precious operation time.

For this reason, the pressing end of the upper clamp body 11 is hinged with a first catch 15, and the opening between the upper clamp body 11 and the lower clamp body 12 is closed by the first catch 15 to one side of the lower clamp body 12, thereby avoiding sewing The thread enters the opening, reducing the waste of surgical time. It can be understood that before the clip is not fixed, the first blocking piece 15 is turned to a position that does not affect the opening and closing of the pressing end, for example, it is turned to the upper surface of the upper clip body 11, and after the position is fixed, it is turned to the lower clip body 12 to close Open your mouth. The length of the pressing end of the lower clamp body 12 is greater than the length of the pressing end of the upper clamp body 11. When the opening is closed, the first blocking piece 15 and the upper clamping body 11 form an obtuse angle, preferably 120°. When the suture line touches the first blocking piece At 15 o'clock, quickly guide the suture to slide away from its upper surface to avoid entanglement of the suture.

Certainly, the fixing clip outside the body may run into the same situation, therefore, as shown in Figure 4, the pressing end of the clip body 21 on the fixing clip is hinged with a second catch 23, and forwards to the fixing clip by the second catch 23. One side of the lower clip body 22 closes the opening between the upper clip body 21 of the fixing clip and the lower clip body 22 of the fixing clip.

In order to prevent the blocking plate from moving after being closed and affecting the effect, in this embodiment, as shown in Figure 5, the end of the pressing end of the lower clip body 22 of the fixing clip is provided with a bending blocking part 27 and a rotating shaft mounting part 26 connected thereto, and There is a gap between the two for engaging the second blocking piece 23 , and the second blocking piece 23 rotates and squeezes over the rotating shaft installation portion 26 to enter the gap for engagement.

In this embodiment, the rotating shaft installation part 26 is a sleeve structure. In essence, there will be some obstacles when the second blocking piece 23 turns to the rotating shaft mounting part 26. With a little force by hand, the second blocking piece 23 can pass over. , into the engagement gap, so that the second blocking piece 23 cannot move. It is not difficult to understand that the minimum distance between the bending blocking portion 27 , the shaft mounting portion 26 and the rotation center of the second blocking piece 23 should be slightly smaller than the radius of gyration at the end of the second blocking piece 23 .

The pressing end of the lower clip body 12 is only provided with a rotating shaft installation part 26 , and the first blocking piece 15 rotates and squeezes over the rotating shaft installation part 26 to contact with the lower clip body 12 to form an engagement.

It should also be noted that the bending blocking portion 27 is used for installing the second torsion spring 25 .

The traction rope 3 is respectively hinged with the non-injury clip 1 and the fixed clip 2, which increases the flexibility of connection between the traction rope 3 and the non-damage clip 1 and the fixed clip 2, and ensures that the traction force is compliant.

Specifically, the traction rope 3 is hinged to the lower clip body 12 and the lower clip body 22 of the fixing clip respectively. The two ends of the traction rope 3 are provided with a T-shaped shaft, which is hinged with the lower clip body 12 and the lower clip body 22 of the fixing clip by the T-shaped shaft. In this embodiment, one end of the traction rope 3 is hinged to the lower clamp body 12 through the first T-shaped rotating shaft 17 , and the other end is hinged to the lower clamp body 22 through the second T-shaped rotating shaft 24 , that is, to the rotating shaft installation part 26 .

In this embodiment, as shown in Figure 3, the mating surfaces of the upper clamping part 13 and the lower clamping part 14 are provided with staggered protrusions 18, which is beneficial to increase the frictional force with the incision tissue of the heart and prevent the Slippage affects surgery.

Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can use the methods and technical contents disclosed above to analyze the present invention without departing from the spirit and scope of the present invention. Possible changes and modifications are made in the technical solution. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention, which do not depart from the content of the technical solution of the present invention, all belong to the technical solution of the present invention. protected range.

Claims (9)

1. The heart tissue retractor is characterized by comprising a non-invasive clamp, a distal fixing clamp and a traction rope, wherein the proximal fixing clamp is used for clamping tissue at a heart incision, the distal fixing clamp is used for clamping the tissue at the heart incision, and the traction force and the traction direction of the tissue at the heart incision are changed by adjusting the positions of the fixing clamp and/or the clamping positions of the non-invasive clamp;

the non-invasive clamp comprises an upper clamp body with an upper clamping part and a lower clamp body with a lower clamping part, wherein the upper clamping part and the lower clamping part are arc-shaped plates and are matched with each other, and are inclined to one side of the lower clamp body;

the direction of the bus of the arc-shaped plate is consistent with the inclined direction of the bus.

2. The heart tissue retractor of claim 1 wherein the pull cord is hinged to the atraumatic clip and the fixation clip, respectively.

3. The heart tissue retractor of claim 1 wherein mating surfaces of the upper and lower clamping portions are provided with staggered protrusions.

4. The heart tissue retractor of claim 2 wherein the lower clip body pressing end has a length greater than the upper clip body pressing end, the upper clip body pressing end being hinged with a first flap, the opening between the upper clip body and the lower clip body being closed by the first flap being rotated to one side of the lower clip body, and the first flap being at an obtuse angle with respect to the upper clip body when closed.

5. The heart tissue retractor of claim 4 wherein the retaining clip comprises an upper retaining clip body and a lower retaining clip body, wherein the pressing end of the upper retaining clip body is hinged with a second stop, and the opening between the upper retaining clip body and the lower retaining clip body is closed by the second stop being rotated to one side of the lower retaining clip body.

6. The heart tissue retractor of claim 5 wherein the pull cord is hinged to the lower clip body and the lower clip body of the retaining clip, respectively.

7. The heart tissue retractor of claim 6 wherein the traction rope has T-shaped shafts at both ends, and is hinged to the lower clamp body and the lower clamp body of the fixing clamp by the T-shaped shafts.

8. The heart tissue retractor of claim 5 wherein the end of the lower clip body pressing end of the retaining clip is provided with a bent blocking portion and a shaft mounting portion connected thereto, and a gap is provided therebetween for engaging the second blocking piece, the second blocking piece being rotationally extruded over the shaft mounting portion into the gap engagement.

9. The heart tissue retractor of claim 4 wherein the lower clip body pressing end is provided with a shaft mounting portion and the first flap is rotationally extruded over the shaft mounting portion to contact the lower clip body to form a snap fit.