A transplanted heart left atrium trimming measuring device and its use method

Abstract

The present invention relates to a transplanted heart left atrium trimming measuring device and a method of using the same, comprising an elliptical measuring plate and an operating rod vertically passing through the measuring plate, an adjusting airbag connected to the edge of the measuring plate, a sealed air-filled cavity formed between the adjusting airbag and the measuring plate, one end of the operating rod passing through the adjusting airbag and connected to a positioning airbag, a hand-pinch airbag provided at the other end of the operating rod, a vent groove provided inside the operating rod, a vent hole provided on a section of the operating rod inside the adjusting airbag, the hand-pinch airbag, the positioning airbag and the adjusting airbag being interconnected through the vent groove and the vent hole, and a one-way air inlet valve provided on the hand-pinch airbag. The present invention is used for trimming the left atrium of a transplanted heart before a heart transplant operation, and can measure and mark the size of the incision and the amount of tissue removed as needed, thereby ensuring accurate trimming and reducing the difficulty of operation.

Description

Technical field:

[0001] The present invention relates to the technical field of medical devices, and in particular to a transplanted heart left atrium trimming measuring device and a use method thereof. Background technology:

[0002] In heart transplant surgery, in order to ensure a good anastomosis between the donor heart and the recipient during the operation, reduce the difficulty of the operation and speed up the efficiency, the donor heart needs to be trimmed before the operation. After the donor heart is removed, the following trimming steps need to be performed: (1) Cut the right atrium from the inferior vena cava opening to the right atrial appendage line until the root of the right atrial appendage; (2) Trim the ends of the aorta and pulmonary artery neatly, and try to retain their length; (3) Check the mitral valve and tricuspid valve separately, and suture the oval foramen if it is found that it is not closed; (4) Make an X-shaped cross incision along the four pulmonary vein entrances to cut the posterior wall of the left atrium and remove excess tissue to make it a single opening (see Appendix). Figure 1 ). The donor heart treated by the above steps can be transplanted. When cutting the left atrium posterior wall, due to the different operating experience of different doctors, the size of the incision area depends on the subjective judgment of the doctor, which is easy to cause inappropriate incision area and tissue removal. If the incision is too small, it will lead to too much residual tissue on the left atrium posterior wall, causing postoperative thrombus accumulation. If the incision is too large, it will lead to too little residual tissue on the left atrium posterior wall, which will increase the difficulty of subsequent suturing, may injure the coronary artery, and increase the risk of surgery. Patent No. ZL201420479715.5 sets a cylindrical hole cutter on the outer periphery of the connecting rod of the positioner, and the lower section of the hole cutter is a thin-walled cylinder, and the lower end of the thin-walled cylinder is an intermittent willow-leaf blade, which can locate the hole on the beating heart and smoothly cut off the excess heart wall. However, this device can only be used to punch holes in the heart for pipeline insertion. The punching area is small and the aperture cannot be adjusted. It is not suitable for making an incision of the right size to match the recipient on the left atrium posterior wall when transplanting the heart, which makes subsequent surgical operations difficult. Summary of the invention:

[0003] 1. Technical problems solved:

[0004] The present invention aims to provide a transplanted heart left atrium trimming measuring device and a method of using the same, which is used to make an opening on the posterior wall of the left atrium of the transplanted heart during heart transplant surgery, thereby solving the problem that it is difficult to make an incision of a suitable size on the transplanted heart in the prior art, causing difficulties in subsequent surgical operations.

[0005] (II) Technical solution:

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions: a transplanted heart left atrium trimming measuring instrument, comprising an elliptical measuring plate and an operating rod vertically passing through the measuring plate, the edge of the measuring plate is connected to an adjusting airbag, a sealed inflation cavity is formed between the adjusting airbag and the measuring plate, one end of the operating rod passes through the adjusting airbag and is connected to a positioning airbag, the other end of the operating rod is provided with a hand-pinch airbag, a ventilation groove is provided in the operating rod, a ventilation hole is provided on a section of the operating rod inside the adjusting airbag, the hand-pinch airbag, the positioning airbag and the adjusting airbag are connected to each other through the ventilation groove and the ventilation hole, and a one-way air inlet valve is provided on the hand-pinch airbag.

[0007] The measuring plate is used to limit the shape and expansion direction of the regulating airbag, and is convenient for measuring and calculating the circumference of the incision. The regulating airbag is used to press on the inner wall of the left atrium. The edge of the regulating airbag contacts the inner wall of the left atrium and the position to be trimmed can be marked by drawing a line with a biological marker pen. The size of the incision area can be adjusted by inflating the regulating airbag, so as to make an incision of appropriate size on the posterior wall of the left atrium as needed, which is convenient for subsequent transplantation surgery. The positioning airbag is used to be inserted into the left ventricle below the mitral valve to position the regulating airbag and the operating rod to prevent the operating rod from moving when the regulating airbag is inflated, which affects the accuracy of the drawing. The hand-pinch airbag is used to inflate the positioning airbag and the regulating airbag, and the one-way air inlet valve is used to control the one-way entry of external air into the hand-pinch airbag.

[0008] Furthermore, two notches are provided on the upper edge of the measuring plate, and the two notches are symmetrically arranged on both sides of the measuring plate to divide the outer edge of the measuring plate into equal parts. The notches are used to align with the upper and lower pulmonary vein entrances on the left atrium before drawing lines, respectively, to position the placement angle of the elliptical measuring plate, and to ensure that the position of the drawn lines and the shape and direction of the incision meet the surgical requirements.

[0009] Furthermore, the measuring plate is provided with an air vent, a plug is threadedly connected to the air vent, and the air vent is used to release the air in the regulating airbag and the positioning airbag, which is convenient for use.

[0010] Furthermore, the regulating airbag and the positioning airbag are both made of elastic plastic film material, the wall thickness of the regulating airbag is smaller than that of the positioning airbag, and under the same air pressure conditions in the inflation chamber, the expansion degree of the regulating airbag is greater than that of the positioning airbag, thereby ensuring that the positioning airbag does not expand too much in the left ventricle and cause squeezing damage to the heart.

[0011] Furthermore, the major diameter of the measuring plate is 40-45 mm, and the minor diameter is 30-35 mm, so as to meet the size requirements of the incision size of most human heart transplant operations.

[0012] Furthermore, the distance between the measuring plate and the bottom of the regulating airbag is 10-25 mm to meet the distance requirement between the resection site and the entrance of the mitral valve.

[0013] The present invention also discloses a method for using a transplanted heart left atrium pruning measuring device, comprising the following steps:

[0014] Step 1: before trimming the posterior wall of the left atrium, make an X-shaped cross incision along the four pulmonary vein entrances on the left atrium to cut the posterior wall of the left atrium, turn over the tissue at the incision to expose the entrance of the mitral valve in the left atrium, insert one end of the operating rod provided with the positioning airbag into the left ventricle along the entrance of the mitral valve, and place the regulating airbag and the measuring plate in the left atrium;

[0015] Step 2: pinch the hand-pinched airbag to inflate the regulating airbag and the positioning airbag through the ventilation groove and the ventilation hole. The regulating airbag and the positioning airbag expand to hold the mitral valve and thereby locate the position of the operating rod. The edge of the regulating airbag is pressed against the inner wall of the left atrium. A biological marker pen is used to mark the tissue to be removed along the edge where the regulating airbag contacts the inner wall of the left atrium to make a trimming line. The size of the area to be removed is controlled by controlling the size of the regulating airbag.

[0016] Step three: Use surgical scissors to trim along the trimming line made by the biological marker pen to remove excess tissue at the incision in preparation for subsequent transplantation surgery.

[0017] (III) Beneficial effects:

[0018] Compared with the prior art, the beneficial effects produced by the present invention are as follows: by setting an operating rod that passes vertically through the measuring plate on the elliptical measuring plate, the edge of the measuring plate is connected to an adjusting airbag, a sealed inflation cavity is formed between the adjusting airbag and the measuring plate, one end of the operating rod passes through the adjusting airbag and is connected to the positioning airbag, and a hand-pinch airbag is set at the other end of the operating rod, so that the appropriate incision size can be measured on the left atrium of the transplanted heart and assist in drawing lines, thereby determining the accurate incision area and tissue resection amount, facilitating trimming operations, and effectively reducing the difficulty of subsequent operations. Description of the drawings:

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below.

[0020] Figure 1 This is a schematic diagram of the left atrium after trimming during heart transplant surgery;

[0021] Figure 2 This is a cross-sectional view of the left atrium during transplant surgery when it is not trimmed;

[0022] Figure 3 is a structural cross-sectional view of the transplanted heart left atrium trimming measuring device according to an embodiment of the present invention;

[0023] Figure 4 is a front view of the transplanted heart left atrium trimming measuring device in use according to an embodiment of the present invention;

[0024] Figure 5 is a cross-sectional view of the transplanted heart left atrium trimming measuring device in use according to an embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the heart transplant surgery when the left atrium is trimmed and sutured for transplant surgery;

[0026] In the figure: 1. measuring plate; 2. operating lever; 3. adjusting airbag; 4. inflation chamber; 5. positioning airbag; 6. hand-pinch airbag; 7. ventilation groove; 8. ventilation hole; 9. one-way air inlet valve; 10. notch; 11. deflation port; 12. plug; 13. biological marker; 14. left atrium; 15. left ventricle; 16. incision; 17. resection site; 18. mitral valve; 19. trimming line Specific implementation method:

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0028] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, a transplanted heart left atrium trimming measuring device includes an elliptical measuring plate 1 and an operating rod 2 vertically passing through the measuring plate 1, an edge of the measuring plate 1 is connected to an adjusting airbag 3, a sealed inflation chamber 4 is formed between the adjusting airbag 3 and the measuring plate 1, one end of the operating rod 2 passes through the adjusting airbag 3 and is connected to a positioning airbag 5, the other end of the operating rod 2 is provided with a hand-pinch airbag 6, a ventilation groove 7 is provided in the operating rod 2, a section of the operating rod 2 in the adjusting airbag 3 is provided with a ventilation hole 8, the hand-pinch airbag 6, the positioning airbag 5 and the adjusting airbag 3 are interconnected through the ventilation groove 7 and the ventilation hole 8, and a one-way air inlet valve 9 is provided on the hand-pinch airbag 6.

[0029] Preferably, two notches 10 are provided on the upper edge of the measuring plate 1, and the two notches 10 are symmetrically arranged on both sides of the measuring plate 1 to divide the outer edge of the measuring plate 1 into equal parts. The notches 10 are used to align with the upper and lower pulmonary vein entrances on the left atrium before drawing lines, respectively, to position the placement angle of the elliptical measuring plate 1, and to ensure that the position of the drawn lines and the shape and direction of the incision meet the surgical requirements.

[0030] Preferably, the measuring plate 1 is provided with an air vent 11 , to which a plug 12 is threadedly connected. The air vent 11 is used to release the air in the regulating airbag 3 and the positioning airbag 5 , which is convenient for use.

[0031] Preferably, the regulating airbag 3 and the positioning airbag 5 are both made of elastic plastic film, the wall thickness of the regulating airbag 3 is smaller than the wall thickness of the positioning airbag 5, and under the same air pressure conditions in the inflation chamber 4, the expansion degree of the regulating airbag 3 is greater than the expansion degree of the positioning airbag 5, ensuring that the positioning airbag 5 does not expand too much in the left ventricle 15 and cause squeezing damage to the heart.

[0032] Preferably, the major diameter of the measuring plate 1 is 40-45 mm, and the minor diameter is 30-35 mm, so as to meet the size requirements of the incision size of most human heart transplant surgeries.

[0033] Preferably, the distance between the measuring plate 1 and the bottom of the regulating balloon 3 is 10-25 mm to meet the distance requirement between the resection site 17 and the entrance of the mitral valve 18 .

[0034] The measuring plate 1 is used to limit the shape and expansion direction of the regulating airbag 3, and is convenient for measuring and calculating the circumference of the incision 16. The regulating airbag 3 is used to press on the inner wall of the left atrium 14. The edge of the regulating airbag 3 contacts the inner wall of the left atrium 14 by drawing a line with a biological marker pen 13 to mark the position that needs to be trimmed. The size of the regulating airbag 3 is controlled by inflation and expansion, and the area of ​​the incision 16 can be adjusted, so that an incision 16 of a suitable size can be made on the posterior wall of the left atrium 14 as needed, which is convenient for subsequent transplantation operations. The positioning airbag 5 is used to be inserted into the left ventricle 15 below the mitral valve 18 to position the regulating airbag 3 and the operating rod 2 to prevent the operating rod 2 from moving when the regulating airbag 3 is inflated, affecting the accuracy of the drawing. The hand-pinch airbag 6 is used to inflate the positioning airbag 5 and the regulating airbag 3, and the one-way air inlet valve 9 is used to control the one-way entry of external air into the hand-pinch airbag 6.

[0035] A method for using a transplanted heart left atrium pruning measuring device according to an embodiment of the present invention comprises the following steps:

[0036] Step 1: Before trimming the posterior wall of the left atrium 14, make an X-shaped cross incision along the four pulmonary vein entrances on the left atrium 15 to cut the posterior wall of the left atrium 14, turn over the tissue at the incision 14 to expose the entrance of the mitral valve 18 in the left atrium, insert one end of the operating rod 2 with the positioning balloon 5 into the left ventricle 15 along the entrance of the mitral valve 18, and place the regulating balloon 3 and the measuring plate 1 in the left atrium 14;

[0037] Step 2: pinch the kneading airbag 6, and inflate the adjusting airbag 3 and the positioning airbag 5 through the venting groove 7 and the venting hole 8. The adjusting airbag 3 and the positioning airbag 5 expand, and the mitral valve 18 is supported to locate the position of the operating rod 2. The edge of the adjusting airbag 3 is pressed against the inner wall of the left atrium 14. The biological marker pen 13 is used to mark the tissue to be removed along the edge where the adjusting airbag 3 contacts the inner wall of the left atrium 14, and the trimming line 19 is made. The size of the area 17 to be removed is controlled by controlling the size of the adjusting airbag 3.

[0038] Step three, use surgical scissors to trim along the trimming line 19 made by the biological marker pen 13 to remove excess tissue at the incision for subsequent transplantation surgery.

[0039] In summary, the transplanted heart left atrium trimming measuring device and its use method provided by the present invention are used to open the posterior wall of the left atrium of the transplanted heart during heart transplant surgery, thereby solving the problem that it is difficult to make an incision of appropriate size on the transplanted heart in the prior art, causing difficulties in subsequent surgical operations.

[0040] The present invention is described above by way of examples, but the present invention is not limited to the above specific embodiments, and any changes or modifications made based on the present invention belong to the scope of protection claimed by the present invention.

Claims

1. A transplanted heart left atrium trimming measuring device, characterized in that: It comprises an elliptical measuring plate and an operating rod vertically passing through the measuring plate, the edge of the measuring plate is connected to an adjusting airbag, a sealed air-filled cavity is formed between the adjusting airbag and the measuring plate, one end of the operating rod passes through the adjusting airbag and is connected to a positioning airbag, the other end of the operating rod is provided with a hand-pinch airbag, a ventilation groove is provided in the operating rod, a ventilation hole is provided on a section of the operating rod in the adjusting airbag, the hand-pinch airbag, the positioning airbag and the adjusting airbag are connected to each other through the ventilation groove and the ventilation hole, and a one-way air inlet valve is provided on the hand-pinch airbag; The upper edge of the measuring plate is provided with two notches, and the two notches are symmetrically arranged on both sides of the measuring plate to divide the outer edge of the measuring plate into equal parts; The measuring plate is provided with an air vent, and a plug is threadedly connected to the air vent.

2. The transplant heart left atrium trimming measuring device according to claim 1, characterized in that: The regulating airbag and the positioning airbag are both made of elastic plastic film material, and the wall thickness of the regulating airbag is smaller than the wall thickness of the positioning airbag.

3. The transplant heart left atrium trimming measuring device according to claim 1, characterized in that: The major diameter of the measuring plate is 40-45 mm, and the minor diameter is 30-35 mm.

4. The transplant heart left atrium trimming measuring device according to claim 1, characterized in that: The distance between the measuring plate and the bottom of the regulating airbag is 10-25 mm.

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