CN103462656A - Minimally invasive mitral valve retractor - Google Patents

Abstract

The present application provides a minimally invasive mitral valve retractor, the minimally invasive mitral valve retractor comprising: an angle adjustment rod (1); a guide rod (2); the angle adjustment rod can be slidably inserted through the guide rod; clamping part (5), the top of the clamping part is provided with a through hole, the lower part of the guide rod is firmly inserted into the through hole of the clamping part, and when the warping angle is adjusted said guide rod is fixed relative to said gripping portion as the rod slides in said guide rod; and a self-positioning spreader (6) with sides of said gripping portion pivotally engaged with said self-positioning spreader, Therefore, when adjusting the tilt angle adjustment lever to drive the clamping part to pivot, the angle between the guide rod and the self-positioning spreader is adjusted according to the distance the tilt angle adjustment lever slides in the guide rod, so that the self-positioning spreader remains at in the orientation corresponding to the angle.

Description

Minimally Invasive Mitral Valve Retractor

technical field

The present invention relates to the field of medical devices, and more particularly, to a minimally invasive mitral valve retractor for use in cardiac surgery.

Background technique

In cardiac surgery, multiple instruments need to cooperate to complete the operation on a certain operating area. When the operator operates one of the instruments, the other instruments should be stably fixed in a certain position to complete the corresponding auxiliary actions. In order to realize this positioning, a positioning and opening system is generally provided during the operation, and the positioning and opening system can keep a certain designated incision open so as to operate on the tissue inside the incision.

In the prior art, the fixer fixed on the side of the bed is usually used as the basis for positioning the expansion system to realize the positioning function, but the expansion system in the prior art can only have a fixed expansion size, if necessary, it has a different If the size of the spreader is different, the accessories of the spreader need to be replaced. Such an operation is very tedious and time-consuming.

Therefore, it is necessary to provide a minimally invasive mitral valve retractor, the design of the retractor is small, the positioning and adjustment are convenient and quick, and the opening size can be adjusted as required without changing the attachment of the retractor.

Contents of the invention

In order to overcome the existing defects and realize the adjustment of the opening size conveniently, stably and quickly during the operation, the present invention proposes a minimally invasive mitral valve retractor. The minimally invasive mitral valve retractor includes: an angle adjustment rod; a guide rod; the angle adjustment rod can be slidably inserted through the guide rod; a clamping part, the top of the clamping part is provided with a through hole, so The lower part of the guide rod is firmly inserted into the through hole of the clamping part, and when the warping angle adjustment rod slides in the guide rod, the guide rod is fixed relative to the clamping part; and a self-positioning spreader, the side of the clamping part is pivotally engaged with the self-positioning spreader, so that when the warping angle adjustment lever is adjusted to drive the clamping part to pivot, according to the warping angle adjustment lever The sliding distance in the middle adjusts the angle between the guide rod and the self-positioning spreader, so that the self-positioning spreader is kept at an orientation corresponding to the angle.

Preferably, the tilt angle adjustment rod is threadedly connected to the upper end of the guide rod, so that the tilt angle adjustment rod can be rotatably slid in the guide rod to adjust the tilt angle adjustment rod on the guide rod. The sliding distance.

The minimally invasive mitral valve retractor also includes a compression knob, which can be adjusted to be sleeved on the guide rod; and an abutment, which is sleeved on the guide rod and located on the Below the compression knob, it is used to cooperate with the compression knob to fix the minimally invasive mitral valve retractor in an appropriate position, wherein the compression knob also includes a compression top ball, and the compression top ball is set Between the pressing knob and the abutment, and sleeved on the outside of the guide rod, one end of the pressing ball abuts against the upper part of the abutment, and is connected with the pressing abutment One end of the ball is diametrically opposed to the other end against the compression knob, wherein when the compression header is compressed by the compression knob, at least a portion of the compression header can be pressed into the compression knob. tightening knob, and at least another portion of the compacting ball can be pressed into the abutment, so that the compacting ball wraps the guide rod so that the guide rod is relative to the abutment fixed.

Preferably, the self-positioning spreader includes: a rotating arm; at least two spreading arms, one end of each spreading arm of the at least two spreading arms is fixed on the same longitudinal pivot, and can respectively surround the The longitudinal pivot pivots so that there is an opening angle between the at least two opening arms; and a spring structure disposed between the at least two opening arms for providing compression Force so that the opening angle between the at least two opening arms does not change, wherein one end of the rotating arm has a transverse opening, and the longitudinal pivot extends from the top end of the opening to the bottom end of the opening, the The upper part of the other end of the rotating arm is pivotally connected with the side part of the clamping part, so that the clamping part pivots around the self-positioning spreader, the lower part of the other end of the rotating arm is extended, and The end of the warping angle adjusting rod passing through the clamping portion abuts against the lower part of the other end of the rotating arm, so that when the warping angle regulating rod is adjusted, the warping angle regulating rod and the There is a stable angle between the self-positioning spreaders.

Preferably, at least one of the at least two spreading arms has a boss for being gripped by a tool so as to adjust the spreading angle between the at least two spreading arms during operation.

More preferably, said at least two splayed arms are of different lengths so as to be foldable together.

Preferably, a groove is provided on the outside of the lower part of the guide rod inserted into the through hole of the clamping part, and a groove is provided on the inside of the through hole of the clamping part corresponding to the outside of the guide rod. There is an inner boss, and the groove is inserted into the inner boss so as to fix the guide rod into the through hole of the clamping part.

The present invention also provides a method for operating a minimally invasive mitral valve retractor, the method comprising the following steps: inserting an angle adjustment rod into a guide rod and inserting it through the guide rod; the lower part is firmly inserted into the through hole at the top of the clamping part and the warping angle adjustment rod is inserted through the clamping part; and

pivotally connecting said clamping portion to a self-positioning spreader and enabling said clamping portion to pivot relative to said self-positioning spreader, wherein in operation, the warping angle adjustment rod is positioned within said guide rod Sliding; the clamping part pivots relative to the self-positioning spreader with the sliding of the warping angle adjustment rod, so as to adjust the distance between the guide rod and the self-positioning spreader according to the sliding distance of the warping angle adjustment rod in the guide rod. and keep the self-positioning spreader in an orientation corresponding to the angle.

Preferably, the warping angle adjusting rod is threadedly connected to the upper end of the guide rod, so that the warping angle regulating rod can be rotatably slid in the guiding rod to adjust the warping angle adjusting rod in the The distance that slides in the guide rod.

Preferably, the method also includes fixing the minimally invasive mitral valve retractor, and fixing the minimally invasive mitral valve retractor includes the following steps: the compression knob can be adjusted to be sleeved on the guide rod; and the abutment Sleeved on the guide rod and located below the compression knob, it is used to cooperate with the compression knob to fix the minimally invasive mitral valve retractor in a proper position, between the compression knob and the compression knob Provide a compression header between the abutments, and set the compression header on the outside of the guide rod, wherein the step of providing the compression header includes: making one end of the compression header abut against the upper part of the abutment, and make the other end diametrically opposite to one end of the compression header abut against the compression knob, when the compression knob is used to compress the compression header , pressing at least a part of the compacting head into the compacting knob, and pressing at least another part of the compacting head into the abutment, so that the compacting head wraps the guide rod so that the guide rod is fixed relative to the abutment.

Preferably, adjusting said self-positioning spreader comprises the steps of: pivoting at least one of at least two spreader arms about a longitudinal pivot on a pivot arm; and The compressive force provided by the spring structure keeps the at least two arms at a required opening angle.

Preferably, a tool is used to grip a boss on at least one of said at least two spreading arms so as to adjust the spreading angle between said at least two spreading arms during operation.

More preferably, the at least two splayed arms are of different lengths so that they can be folded together.

Preferably, the groove provided on the part of the guide rod inserted into the clamping part is inserted into the inner protrusion provided inside the through hole of the clamping part corresponding to the part of the guide rod platform, so that the lower part of the guide rod is fixed in the through hole of the clamping part.

The present invention utilizes the minimally invasive mitral valve retractor to simply, quickly and accurately adjust the opening size of the opening arm and the orientation of the entire minimally invasive mitral valve retractor without the need to replace any parts, and the present invention The minimally invasive mitral valve retractor has a simple structure and small volume, and is convenient for operation and storage.

Description of drawings

1 is a perspective view of a minimally invasive mitral valve retractor according to an embodiment of the present invention;

Fig. 2 is a partially enlarged schematic diagram of the upper half of the minimally invasive mitral valve retractor of Fig. 1;

Fig. 3 is a partially enlarged schematic diagram of the lower half of the minimally invasive mitral valve retractor of Fig. 1;

Fig. 4 is an exploded perspective view of the guide rod of the minimally invasive mitral valve retractor of Fig. 1 inserted into the clamping part;

Fig. 5A is a top view of the self-adjusting spreader of the minimally invasive mitral valve retractor of Fig. 1;

Figure 5B is a side sectional view of the self-adjusting spreader of the minimally invasive mitral valve retractor of Figure 1;

Fig. 6A is an overall sectional view of the minimally invasive mitral valve retractor of Fig. 1;

Figure 6B is an enlarged detail view of part I of Figure 6A; and

Fig. 6C is an enlarged detail view of part III of Fig. 6A.

Detailed ways

The minimally invasive mitral valve retractor provided by the present invention and its operating method will be described in detail below with reference to the accompanying drawings and specific embodiments.

Fig. 1 shows a perspective view of a minimally invasive mitral valve retractor according to an embodiment of the present invention. Fig. 2 is a partially enlarged schematic view of the upper half of the minimally invasive mitral valve retractor in Fig. 1 . Fig. 3 is a partially enlarged schematic diagram of the lower half of the minimally invasive mitral valve retractor in Fig. 1 . Fig. 4 is an exploded perspective view of the guide rod of the minimally invasive mitral valve retractor in Fig. 1 inserted into the clamping part. 5A is a top view of the self-adjusting spreader of the minimally invasive mitral valve retractor of FIG. 1 . 5B is a side cross-sectional view of the self-adjusting spreader of the minimally invasive mitral valve retractor of FIG. 1 . FIG. 6A is an overall sectional view of the minimally invasive mitral valve retractor in FIG. 1 . Fig. 6B is an enlarged detail view of part I of Fig. 6A. Fig. 6C is an enlarged detail view of part III of Fig. 6A.

As shown in FIG. 1 , the minimally invasive mitral valve retractor includes an angle adjustment rod 1 , a guide rod 2 , a clamping part 5 , and a self-positioning spreader 6 . Wherein the warping angle adjustment rod 1 can be slidably inserted through the guide rod and penetrates the clamping part 5 to abut on the extended part of the rotating arm 7 of the self-positioning spreader 6, as shown in Fig. 1 and Fig. 3 . 7 on the part extending to the left side of the figure.

The warping angle adjustment rod 1 can move in various directions (see the directions shown by the arrows in FIG. 2 ), so as to position the self-positioning spreader to the desired position during the operation.

As shown in FIGS. 3 and 4 , the top of the clamping portion 5 is provided with a longitudinally through hole, and the lower part of the guide rod 2 is inserted into the through hole of the clamping portion 5 . An inner boss (not shown) is provided inside the through hole of the clamping part, and a groove corresponding to the boss is provided on the lower part of the guide rod inserted into the through hole. During assembly, the inner bosses are inserted into the corresponding grooves, so that when the warping angle adjustment rod 1 slides in the guide rod 2 , the guide rod 2 can be fixed relative to the clamping part 5 . The present invention is not limited thereto, a protrusion may be provided on the guide rod and a groove may be provided inside the through hole of the clamping part. In addition, in addition to the plug-in fixing method of the groove and the inner boss, other fixing methods can also be used, such as concealed buttons, knobs, buckles, wedging, etc., as long as the guide rod can be fixed relative to the clamping part. Can. In this way, even when the tilt angle adjusting rod 1 slides in the guide rod 2 , the guide rod 2 can be fixed relative to the clamping portion 5 , so that no displacement occurs due to the sliding of the tilt angle adjusting rod 2 .

In this way, as shown in FIG. 3 , the insertion of the tilting angle adjusting rod 1 drives the clamping part 5 to pivot relative to the self-positioning spreader 6 through the end of the clamping part 5, so that the tilting angle changes, and finally the self-positioning spreader 6 is stabilized. In a certain tilted state.

In addition, as shown in FIG. 6C, the warping angle adjusting rod 1 can slide in the guide rod 2, and this sliding can be achieved by providing threaded structures on the inside of the upper part of the guiding rod and part of the outer part of the upper part of the warping angle adjusting rod 1, respectively. accomplish. The two thread structures are engaged with each other, so that the warp angle adjustment rod can have a helical movement inside the guide rod, so the distance the warp angle adjustment rod slides in the guide rod can be adjusted (that is, the warp angle adjustment rod is inserted into the guide rod and penetrate the length of the clamping part 5). The present invention is not limited thereto, and the threaded structure can be arranged at other positions, or even not provided with threads, as long as the warping angle adjusting rod 1 can slide inside the guide rod 2 .

Preferably, as shown in FIG. 2 , the top of the tilt angle adjusting rod 1 may have a knob-like handle, so as to facilitate the user to adjust the sliding distance of the tilt angle adjusting rod 1 in the guide rod 2 . Of course, the present invention is not limited thereto, and handles of any other shape can be provided as long as the above-mentioned sliding distance can be adjusted.

The lower part of the side (the right side shown in the figure) of the clamping part 5 is extended and pivotally engaged with the self-positioning spreader 6, so that when the tilting angle adjustment lever is adjusted to drive the clamping part to pivot, according to the tilting angle Adjust the length of the rod 1 protruding from the clamping part to determine the angle (warping angle) between the guide rod 5 and the self-positioning spreader 6, so that the self-positioning spreader 6 is kept at an orientation corresponding to the angle. Of course, the present invention is not limited thereto, and the position of the self-positioning spreader can be adjusted according to the usage habit of the user, so that the other side parts of the clamping part 5 are pivotally engaged with the self-positioning spreader.

As shown in FIGS. 5A and 5B , the self-positioning spreader 6 may include: a rotating arm 7 ; at least two spreading arms 8 and a spring structure 10 .

One end of each opening arm of at least two opening arms is fixed on the longitudinal pivot that is arranged on the rotating arm 7, and can respectively pivot around the longitudinal pivot, so that between the at least two opening arms 8 has a splay angle.

The spring structure 10 is arranged between the at least two opening arms for providing a pressing force so that the opening angle between the at least two opening arms 8 does not change. The spring structure 10 can be a spring washer, and can also be other elastic structures capable of forming a suitable frictional force through a pressing force. Like this, after the opening angle between at least two opening arms is adjusted to a certain angle, there is no need to Clamping the at least two splayed arms using an external tool maintains the splayed angle at that angle without changing under compression of surgical site tissue.

Preferably, as shown in Figures 5A and 5B, one end of the pivot arm has a transverse opening, and the aforementioned longitudinal pivot extends from the top end of the opening to the bottom end of the opening. More preferably, the upper part of the other end of the rotating arm can have a transverse pivot, and the side part of the clamping part pivotally engaged with the self-positioning spreader can be connected to the self-positioning spreader 6 through the transverse pivot, so that the clamping part 5 Pivot around a lateral pivot of the self-positioning spreader 6 . Of course, the present invention is not limited thereto, and the clamping portion 5 may be directly pivotally connected to the self-positioning spreader 6 without the transverse pivot.

The lower part of the other end of the rotating arm 7 is extended, and the end of the clamping part 5 of the tilting angle adjusting rod 2 abuts against the lower part of the other end of the rotating arm, so that when adjusting the tilting angle adjusting rod There is a stable angle (warping angle) between the warping angle adjusting rod and the self-positioning spreader.

Preferably, as shown in FIG. 4 , the side of at least one of the at least two opening arms may have a boss 9 for facilitating the use of tools such as surgical tweezers to hold the opening arm. , thereby adjusting the opening angle between the at least two opening arms during operation. However, the present invention is not limited thereto, and the boss 9 can be arranged at any position of the opened arm, as long as it is convenient to be clamped.

More preferably, as shown in Figures 3 and 4, at least two open arms can have different lengths so that they can be folded together when not in use, thereby reducing the volume of the minimally invasive mitral valve retractor for easy storage .

In addition, as shown in FIGS. 6A-6C , the minimally invasive mitral valve retractor according to this embodiment preferably also includes a tool for fixing the minimally invasive mitral valve retractor on an auxiliary tool (such as an operating bed, a workbench, etc.). Press knob 3 and abutment 4 tightly. Both the compression knob 3 and the abutment 4 are adjustablely sleeved on the guide rod, and the abutment 4 is located under the compression knob 3, and is used to cooperate with the compression knob, so that the minimally invasive bicuspid The flap retractor is secured in place.

The compression knob 3 may include a compression jacking ball, which is arranged between the compression knob and the abutment, and sleeved on the outside of the guide rod. One end of the pressing ball abuts against the upper part of the abutment 4, and the other end with the opposite diameter leans against the pressing knob. When compressing the compression header by the compression knob, at least a part of the compression header can be pressed into the compression knob 3, and at least another part of the compression header can be pressed into the In the abutment 4 , the pressing ball tightly wraps the guide rod 2 , thereby fixing the guide rod 2 relative to the abutment 4 . In this way, even when the warping angle adjustment rod 1 slides inside the guide rod 2, the guide rod 2, the pressing knob 3 and the abutment 4 can remain relatively fixed without displacement, so that the guide rod and the self-supporting rod can be adjusted accurately and conveniently. Locate the warp between the spreaders.

The method for operating the warping angle adjustment lever will be described in detail below.

The method comprises the following steps: firstly, inserting the warping angle adjusting rod 1 into the guide rod 2 and inserting the warping angle adjusting rod through said guiding rod 2; then inserting the lower part of said guiding rod 2 firmly into the card Insert the warping angle adjusting rod 1 into the through hole of the tightening part 5 through the clamping part 5 and make the end of the warping angle adjusting rod 1 inserted through the clamping part lean against the extension of the clamping part 5 ; Then, the clamping part 5 is pivotally connected to the self-positioning spreader 6 , and the clamping part 5 can pivot relative to the self-positioning spreader 6 .

Wherein, during operation, the warping angle adjusting rod 1 is rotated to slide in the guide rod 2, and the clamping part 5 pivots relative to the self-positioning spreader 6 along with the sliding of the warping angle regulating rod 1, so that There is a certain angle between the guide rod 2 and the self-positioning spreader 6 (warped angle), and the self-positioning spreader 6 is kept in the position corresponding to the angle (the self-positioning spreader is stabilized in a certain tilted state) ).

Wherein the upper end of the warp angle adjustment rod 1 and the guide rod 2 is preferably threaded, so that the warp angle adjustment rod 1 can slide in rotation in the guide rod 2 to controllably adjust the warp angle adjustment rod 1 in the guide rod 2 Swipe distance.

In addition, the minimally invasive mitral valve retractor can also be fixed to the desired position during the operation, such as the edge of the operating table, the bedside, etc., through the following steps.

These steps include: adjusting the compression knob on the guide rod; The compression knob cooperates to secure the minimally invasive mitral valve retractor in place.

In addition, as mentioned above, the compression knob 3 also includes a compression top ball, and the compression top ball is arranged between the compression knob and the abutment, and sleeved on the outside of the guide rod.

The operation method between the compression knob and the abutment has been given in detail above, so it will not be repeated here.

After determining the warping angle between the self-positioning spreader 6 and the guide rod 2 (that is, after determining the tilting state of the self-positioning spreader), the opening between at least two opening arms 8 of the self-positioning spreader can be adjusted. Angle, and since the boss 9 that facilitates the clamping of the surgical tool is set on at least one opening arm, at least two opening arms can be opened after the self-positioning spreader is stretched into the operation site.

Adjusting the opening angle of the self-positioning spreader may include the steps of: clamping the boss 9 on at least one opening arm 8 with a surgical tool such as surgical forceps; pivoting the arm around the longitudinal pivot on the rotating arm 7; The friction force provided by the spring structure arranged between the at least two opening arms 8 keeps the at least two arms at the desired opening angle; then the tool is withdrawn to complete the adjustment.

By using the minimally invasive mitral valve retractor of the present invention, the minimally invasive mitral valve retractor can be adjusted without changing accessories, so as to adapt to incisions of different sizes and shapes. And each part of the minimally invasive mitral valve retractor is easily detachable, so it is convenient for cleaning and storage of each part.

Finally, it should be noted that the above embodiments are only used to describe the technical solutions of the present invention rather than limit the technical methods of the present invention. The present invention can be extended to other modifications, changes, applications and embodiments in application, and therefore it is considered that all such Modifications, changes, applications, and embodiments are all within the spirit and teaching scope of the present invention.

Claims (10)

1. A minimally invasive mitral valve retractor, said minimally invasive mitral valve retractor comprising: Angle adjustment lever (1); A guide rod (2); the warping angle adjustment rod can be slidably inserted through the guide rod; Clamping part (5), the top of the clamping part is provided with a through hole, the lower part of the guide rod is firmly inserted into the through hole of the clamping part, and when the warping angle adjustment rod is in the When sliding in the guide rod, the guide rod is fixed relative to the clamping portion; and A self-positioning spreader (6), the side of the clamping part is pivotally engaged with the self-positioning spreader, so that when the warping angle adjustment lever is adjusted to drive the clamping part to pivot, according to the angle of the warping angle adjustment lever The distance slid in the guide rod adjusts the angle between the guide rod and the self-positioning spreader, keeping the self-positioning spreader in an orientation corresponding to said angle. 2. The minimally invasive mitral valve retractor according to claim 1, wherein the warping angle adjustment rod is threadedly connected to the upper end of the guide rod, so that the warping angle adjustment rod can be rotatably slid in the guide rod , to adjust the sliding distance of the warping angle adjustment rod in the guide rod. 3. The minimally invasive mitral valve retractor according to claim 1, further comprising a compression knob (3), which can be adjusted to be sleeved on the guide rod; and An abutment (4), the abutment is sleeved on the guide rod and located under the compression knob, and is used to cooperate with the compression knob to fix the minimally invasive mitral valve retractor to an appropriate position Location, Wherein the compression knob further includes a compression top ball, the compression top ball is arranged between the compression knob and the abutment, and is sleeved on the outside of the guide rod, wherein one end of the compression header abuts against the upper portion of the abutment, and the other end diametrically opposite to one end of the compression header abuts against the compression knob, Wherein, when the compression header is compressed by the compression knob, at least a part of the compression header can be pressed into the compression knob, and at least another part of the compression header can be pressed into the into the abutment, so that the pressing ball wraps the guide rod, so that the guide rod is fixed relative to the abutment. 4. The minimally invasive mitral valve retractor according to claim 1, wherein the self-positioning spreader (6) comprises: swivel arm (7); At least two opening arms (8), one end of each opening arm of the at least two opening arms is fixed on the same longitudinal pivot, and can respectively pivot around the longitudinal pivot, so that all there is a splay angle between said at least two splay arms; and a spring structure (10), the spring structure is arranged between the at least two opening arms, and is used to provide a pressing force so that the opening angle between the at least two opening arms does not change, Wherein, one end of the rotating arm has a transverse opening, and the longitudinal pivot extends from the top end of the opening to the bottom end of the opening, The upper part of the other end of the rotating arm is pivotally connected to the side part of the clamping part, so that the clamping part pivots around the self-positioning spreader, The lower part of the other end of the rotating arm is extended, and the end of the angle adjusting rod passing through the clamping part abuts against the lower part of the other end of the rotating arm, thereby adjusting the When adjusting the tilting angle, there is a stable angle between the tilting angle adjusting lever and the self-positioning spreader, Preferably, at least one of said at least two spreading arms has a boss (9) for being gripped by a tool to adjust the tension between said at least two spreading arms during operation. opening angle; More preferably, said at least two splayed arms are of different lengths so as to be foldable together. 5. The minimally invasive mitral valve retractor according to claim 1, wherein the lower part of the guide rod inserted into the through hole of the clamping part is provided with a groove, and the outer part of the guide rod is connected with the guide rod. The through hole of the clamping part corresponding to the outside is provided with an inner boss, and the groove is inserted into the inner boss to fix the guide rod into the through hole of the clamping part. 6. A method for operating a minimally invasive mitral valve retractor, said method comprising the steps of: inserting the warp adjustment rod into and through the guide rod; firmly inserting the lower part of the guide rod into the through hole at the top of the clamping part and inserting the warping angle adjusting rod through the clamping part; and pivotally connecting the gripping portion to a self-positioning spreader and enabling pivoting of the gripping portion relative to the self-positioning spreader, Wherein during operation, the warping angle adjustment rod is made to slide in the guide rod; the clamping part pivots relative to the self-positioning spreader with the sliding of the warping angle regulating rod, thereby according to the warping angle Adjusting the sliding distance of the rod in the guide rod adjusts the angle between the guide rod and the self-positioning spreader, and keeps the self-positioning spreader at an orientation corresponding to the angle. 7. The method according to claim 6, wherein the warping angle adjusting rod is threadedly connected to the upper end of the guiding rod, so that the warping angle regulating rod can be rotatably slid in the guiding rod to adjust The sliding distance of the warping angle adjustment rod in the guide rod. 8. method according to claim 6, wherein method also comprises fixing described minimally invasive mitral valve retractor, fixing described minimally invasive mitral valve retractor comprises the following steps: the compression knob (3) is adjustably sleeved on the guide rod; and Sleeving the abutment on the guide rod and under the compression knob for cooperating with the compression knob to fix the minimally invasive mitral valve retractor in place, A compression jacking ball is provided between the compression knob and the abutment, and the compression jacking ball is sleeved on the outside of the guide rod, Wherein, when providing the compression header, it includes the steps of: making one end of the compression header abut against the upper part of the abutment, and making the other end diametrically opposite to the one end of the compression header against the compression knob, When compressing the compression header by the compression knob, at least a part of the compression header is pressed into the compression knob, and at least another part of the compression header is pressed into the compression knob. In the abutment, so that the pressing ball wraps the guide rod, so that the guide rod is fixed relative to the abutment. 9. The method of claim 6, wherein adjusting the self-positioning spreader (6) comprises the steps of: pivoting at least one of the at least two splayed arms about a longitudinal pivot on the pivot arm; and The pressing force provided by the spring structure arranged between the at least two opening arms keeps the at least two arms at a required opening angle; Preferably, a tool is used to clamp a boss (9) on at least one of said at least two spreading arms, thereby adjusting the spreading angle between said at least two spreading arms during operation; More preferably, the at least two splayed arms are of different lengths so that they can be folded together. 10. The method according to claim 6, wherein a groove provided on a portion of the guide rod inserted into the clamping portion is inserted into a catch provided on a portion corresponding to the guide rod. on the inner boss inside the through hole of the tightening part, so that the lower part of the guide rod is fixed in the through hole of the clamping part.

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