Adjustable ventricular connection device

Abstract

This invention discloses an adjustable ventricular connection device for mounting a blood pump at the apex of the heart. It includes an apical suture assembly for suturing to the apex of the heart and a blood pump connection assembly. The apical suture assembly includes a suture ring and an elastic outer suture ring. The outer suture ring is fixedly connected to the suture ring and both are fitted onto the inlet tube of the blood pump, with the inner ring of the outer suture ring sealingly fitting against the outer wall of the inlet tube. The blood pump connection assembly includes an adjusting and fixing ring and a fastener. The adjusting and fixing ring is fitted onto the inlet tube and fixedly connected to the suture ring. The fastener secures the adjusting and fixing ring to the inlet tube, and its position on the inlet tube can be adjusted by loosening the fastener. This invention allows adjustment of the position of the apical suture assembly and the blood pump connection assembly on the inlet tube, enabling adjustment of the optimal insertion depth of the inlet tube into the ventricle according to the myocardial thickness of different patients, achieving individualized treatment to meet the needs of patients with different myocardial thicknesses.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to an adjustable ventricular connection device. Background Technology

[0002] A ventricular assist device (VAD) is used to provide mechanical support for the blood circulation of patients with advanced refractory heart failure, serving as a pre-heart transplant, transitional therapy to restore cardiac function, and long-term treatment. The VAD is connected to the patient's ventricle and aorta via a parallel bypass. The inlet tube of the VAD is inserted into the ventricle through the apical opening of the heart. A power unit drives the impeller of the VAD, drawing blood from the ventricle into the pump chamber. The centrifugal force of the impeller forces the blood out of the pump and through a bridging artificial blood vessel into the aorta, thus supporting the patient's blood circulation.

[0003] Because the thickness of the myocardium varies among patients—generally, the apical wall thickness is 14–35 mm in patients with hypertrophic myocardium and 7.5–13 mm in patients with non-hypertrophic heart failure—the insertion position and depth of the blood pump's inlet tube into the apex also differ depending on the patient's myocardial thickness. If the inlet tube is inserted too deeply into the apex, insufficient blood flushing can occur at the distal end of the ventricular inlet, increasing the risk of thrombosis and potentially endangering the patient's life. Conversely, if the inlet tube is inserted too superficially, myocardial cells can grow into the inlet tube, reducing its flow area and affecting the pump's performance.

[0004] Currently, existing ventricular connection devices all involve fixing a connecting ring to the blood pump and then connecting it to a suture ring fixed at the apex of the heart to secure the blood pump. This structure cannot achieve adjustable insertion depth of the blood pump's inlet tube into the apex of the heart, and cannot meet the needs of patients with different myocardial thicknesses, especially those with myocardial hypertrophy. Summary of the Invention

[0005] The problem to be solved by the present invention is to provide an adjustable ventricular connection device to overcome the shortcomings of the prior art, which cannot achieve adjustable insertion depth of the blood pump inlet tube into the apex of the heart and cannot meet the needs of patients with different myocardial thicknesses, especially myocardial hypertrophy.

[0006] The technical solution adopted by this invention to solve its technical problem is: an adjustable ventricular connection device for installing a blood pump on the apex of the heart, comprising: an apical suture assembly for suturing to the apex of the heart and a blood pump connection assembly. The apical suture assembly includes a suture ring and an elastic outer suture ring. The outer suture ring is fixedly connected to the suture ring and both are fitted onto the inlet tube of the blood pump, and the inner ring of the outer suture ring is sealed against the outer wall of the inlet tube. The blood pump connection assembly includes an adjusting and fixing ring and a fastener. The adjusting and fixing ring is fitted onto the inlet tube and fixedly connected to the suture ring. The fastener is used to fasten the adjusting and fixing ring onto the inlet tube, and the position of the adjusting and fixing ring on the inlet tube can be adjusted by loosening the fastener.

[0007] As a further improvement of the present invention, the suture ring includes a suture piece and a retaining ring extending axially from the side of the suture piece facing the adjusting and fixing ring. The adjusting and fixing ring is provided with a plurality of elastic claws distributed in a ring at intervals, and the plurality of elastic claws are all engaged with the retaining ring.

[0008] As a further improvement of the present invention, each of the elastic claws includes a connecting portion extending axially from the side of the adjusting and fixing ring facing the suture ring and a hook portion connected to the end of the connecting portion. The outer side of the connecting portion is provided with an arc-shaped groove so that the width of the connecting portion gradually increases from the middle to the upper and lower ends. The outer periphery of the retaining ring is provided with a plurality of slots corresponding to the plurality of elastic claws, and the hook portion engages in the corresponding slot.

[0009] As a further improvement of the present invention, the apical suture assembly further includes an elastic inner suture ring disposed within the retaining ring and its inner ring sealingly fitting against the outer wall of the inlet tube.

[0010] As a further improvement of the present invention, the retaining ring is connected to the middle of one side of the suture piece, and the suture piece is divided into an inner ring piece and an outer ring piece by the retaining ring as the dividing line;

[0011] The inner ring is provided with a plurality of inner suture holes at intervals in a ring, and the inner suture ring is sewn to one side of the suture piece through the plurality of inner suture holes;

[0012] The outer ring is provided with a plurality of external suture holes at intervals in a ring, and the external suture ring is sewn to the other side of the suture piece through the plurality of external suture holes.

[0013] As a further improvement of the present invention, the blood pump connection assembly further includes a pressure ring, which is fixed on the adjusting and fixing ring and located between a plurality of elastic claws. The pressure ring cooperates with the inner ring plate to press the inner suture ring.

[0014] As a further improvement of the present invention, the adjusting fixing ring and the pressure ring are each provided with a plurality of hollow holes around their respective circumferences.

[0015] As a further improvement of the present invention, the adjusting and fixing ring is also provided with a connecting ring and a clamp, and a plurality of the elastic claws are integrally connected to one side of the connecting ring; the clamp has a fixed section and an adjustable section, both of which are arc-shaped, the fixed section is integrally connected to the other side of the connecting ring, the adjustable section is provided with a separation hole between it and the other side of the connecting ring so that they do not contact each other, and one end of the adjustable section is integrally connected to one end of the fixed section, and a notch is provided between the other end of the adjustable section and the other end of the fixed section; the fastener is a screw, and the screw is connected to the other end of the adjustable section and the other end of the fixed section to adjust the internal diameter of the clamp.

[0016] As a further improvement of the present invention, the other end of the adjustable section is provided with a through hole, the other end of the fixed section is provided with a screw hole opposite to the through hole, a washer is provided in the notch, and the screw passes through the through hole and the washer and is threadedly connected in the screw hole.

[0017] As a further improvement of the present invention, the adjusting and fixing ring is provided with an internal threaded hole, the outer wall of the inlet pipe is provided with an external thread, and the adjusting and fixing ring is threadedly connected to the inlet pipe; the fastener is a nut, and the nut is threadedly connected to the inlet pipe and locks the adjusting and fixing ring.

[0018] The beneficial effects of this invention are:

[0019] 1. This invention provides an adjustable ventricular connection device, comprising an apical suture assembly and a blood pump connection assembly. The blood pump connection assembly includes an adjusting fixing ring and a fastener. The adjusting fixing ring is fitted onto the inlet tube and fixedly connected to the suture ring of the apical suture assembly. The fastener is used to fasten the adjusting fixing ring onto the inlet tube. By loosening the fastener, the position of the adjusting fixing ring on the inlet tube can be adjusted, thereby adjusting the position of the apical suture assembly and the blood pump connection assembly on the inlet tube. The optimal depth of the inlet tube insertion into the ventricle can be adjusted according to the myocardial thickness of different patients, achieving individualized treatment to meet the needs of patients with different myocardial thicknesses, and improving the success rate and effectiveness of heart failure treatment surgery.

[0020] 2. The fixation between the blood pump connection component and the apical suture component of the present invention is achieved by using the five elastic claws of the adjusting fixing ring and the five slots of the retaining ring to form a snap connection. This structure is simple and efficient to operate, greatly reducing the difficulty of connection during surgery, enabling rapid connection, and ensuring reliable connection, thus shortening the operation time and reducing the risk of surgery.

[0021] 3. The suture ring of this invention is also equipped with an inner suture ring. By using the outer suture ring and the inner suture ring to seal with the inlet tube, a double sealing effect can be achieved, which can achieve the purpose of double leakage prevention, play a double insurance role, and reduce surgical risks.

[0022] 4. The adjustable ventricular connection device of this invention is simple and efficient to manufacture and assemble. The parts are small in size and light in weight, which reduces the burden on patients and increases the success rate of surgery.

[0023] 5. The blood pump connection assembly of the present invention has two adjustment methods, namely clamp type and threaded type, which are simple, safe and effective. Attached Figure Description

[0024] Figure 1 This is a perspective view of the adjustable ventricular connection device installed on a blood pump according to Embodiment 1 of the present invention;

[0025] Figure 2 This is a perspective view of the adjustable ventricular connection device according to Embodiment 1 of the present invention;

[0026] Figure 3 This is a perspective view of the apical suture assembly and blood pump connection assembly according to Embodiment 1 of the present invention;

[0027] Figure 4 This is a cross-sectional view of an adjustable ventricular connection device according to Embodiment 1 of the present invention;

[0028] Figure 5 This is an exploded view of an adjustable ventricular connection device according to Embodiment 1 of the present invention;

[0029] Figure 6 This is a perspective view of the adjusting fixing ring according to Embodiment 1 of the present invention;

[0030] Figure 7 This is a perspective view of the suture ring according to Embodiment 1 of the present invention;

[0031] Figure 8 This is a perspective view of the adjustable ventricular connection device installed on a blood pump according to Embodiment 2 of the present invention;

[0032] Figure 9 This is an exploded view of the adjustable ventricular connection device and blood pump according to Embodiment 2 of the present invention.

[0033] Referring to the accompanying drawings, the following explanations are provided:

[0034] 1. Suture ring; 101. Suture piece; 1011. Inner ring piece; 10111. Inner suture hole; 1012. Outer ring piece; 10121. Outer suture hole; 102. Snap ring; 1021. Snap groove; 2. Outer suture ring; 3. Inlet tube; 301. External thread; 4. Adjusting and fixing ring; 401. Elastic clasp; 4011. Connecting part; 40111. Arc groove; 4012. Snap hook part; 402. Connecting ring; 403. Clamp; 4031. Fixing section; 4032. Adjustable section; 4033. Notch; 404. Separating hole; 405. Internal threaded hole; 460. Hollow hole; 5. Inner suture ring; 6. Pressure ring; 7. Screw; 8. Washer; 9. Nut. Detailed Implementation

[0035] The exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. If several embodiments exist, features in these embodiments may be combined with each other without conflict. When the description refers to the drawings, unless otherwise stated, the same numbers in different drawings represent the same or similar elements. The descriptions in the following exemplary embodiments do not represent all embodiments consistent with the present invention; rather, they are merely examples of apparatuses, products, and / or methods consistent with some aspects of the present invention as set forth in the claims.

[0036] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to limit the scope of protection of this invention. The singular forms "a," "the," or "the" as used in the specification and claims of this invention are also intended to include the plural forms, unless the context clearly indicates otherwise. The terms "comprising" or "including," and similar expressions appearing in this invention are an open-ended expression, meaning that the element preceding "comprising" or "including" covers the element following "comprising" or "including" and their equivalents, without excluding the possibility that the element preceding "comprising" or "including" may also include other elements. The term "a number" in this invention means two or more.

[0037] Example 1

[0038] See Figures 1 to 7 The present invention provides an adjustable ventricular connection device for installing a blood pump on the apex of the heart, comprising: an apical suture assembly and a blood pump connection assembly, wherein the apical suture assembly is used for suturing to the apex of the heart, and the blood pump connection assembly is used for fixedly connecting to the inlet tube 3 of the blood pump and the apical suture assembly.

[0039] The apical suture assembly includes a suture ring 1 and an outer suture ring 2. The outer suture ring 2 is fixedly connected to the suture ring 1. The outer suture ring 2 has a certain degree of elasticity and is made of, but is not limited to, polyester fabric. It is directly sutured to the apex of the heart using surgical sutures. Both the outer suture ring 2 and the suture ring 1 are fitted onto the inlet tube 3 of the blood pump, and the outer suture ring 2 and the inlet tube 3 are press-fitted so that the inner ring of the outer suture ring 2 can seal against the outer wall of the inlet tube 3 to prevent blood leakage from the apex of the heart.

[0040] Furthermore, the blood pump connection assembly includes an adjusting and fixing ring 4 and a fastener. The adjusting and fixing ring 4 is fitted onto the inlet tube 3 and fixedly connected to the suture ring 1. The fastener is used to secure the adjusting and fixing ring 4 to the inlet tube 3, and by loosening the fastener, the position of the adjusting and fixing ring 4 on the inlet tube 3 can be adjusted. This allows for adjustment of the optimal depth of insertion of the inlet tube 3 from the apex of the heart into the ventricle according to the myocardial thickness of different patients, achieving individualized treatment to meet the needs of patients with different myocardial thicknesses and improving the success rate and effectiveness of heart failure treatment surgery.

[0041] Please refer to the specific adjustment structure of this embodiment one. Figure 1 , Figure 2 and Figure 6 The adjusting and fixing ring 4 is provided with a connecting ring 402 at the upper part and a clamp 403 at the lower part. The clamp 403 has a fixed section 4031 and an adjustable section 4032, both of which are arc-shaped. Specifically, both the fixed section 4031 and the adjustable section 4032 are approximately semi-circular rings. The upper side of the fixed section 4031 is integrally connected to the lower side of the connecting ring 402. A separating hole 404 is provided between the upper side of the adjustable section 4032 and the lower side of the connecting ring 402, so that the adjustable section 4032 and the connecting ring 402 do not contact each other. One end of the adjustable section 4032 is integrally connected to one end of the fixed section 4031, and a notch 4033 is provided between the other end of the adjustable section 4032 and the other end of the fixed section 4031. At the same time, the other end of the adjustable section 4032 is provided with a through hole, and the other end of the fixed section 4031 is provided with a screw hole opposite to the through hole.

[0042] In this embodiment, the fastener is screw 7, which passes through the through hole and connects to the screw hole. In its natural state, the inner diameter of the clamp 403 is larger than the outer diameter of the inlet pipe 3. When screw 7 is tightened, it presses the other end of the adjustable section 4032 towards the other end of the fixed section 4031, causing elastic deformation of the adjustable section 4032. This reduces the inner diameter of the clamp 403, thus securing it to the inlet pipe 3. When screw 7 is loosened, the adjustable section 4032 expands outwards due to its own elastic force, and the other end of the adjustable section 4032 moves away from the other end of the fixed section 4031. The inner diameter of the clamp 403 increases, and it no longer secures the inlet pipe 3. This allows the position of the adjusting ring 4 to be moved on the inlet pipe 3 to control the depth of insertion of the inlet pipe 3 into the ventricle. This invention utilizes the tightening and loosening of screw 7 to control the size of the internal diameter of clamp 403, thereby adjusting the position of the apical suture assembly and the blood pump connection assembly on the inlet tube 3 of the blood pump. The optimal depth of the inlet tube 3 inserted into the ventricle from the apex of the heart can be adjusted according to the myocardial thickness of different patients. Moreover, this structure is simple, safe and effective.

[0043] In addition, the blood pump connection assembly also includes a washer 8, which is disposed in the notch 4033. The screw 7 passes through the through hole and is threaded into the screw hole through the washer 8. The washer 8 is used to prevent the screw 7 from being tightened too much, which would cause the clamp 403 to excessively compress the inlet tube 3 and cause damage.

[0044] See Figure 6 The adjustable section 4032 has a circular groove along its inner wall near one end. This circular groove reduces stress, facilitates the tightening of the screw 7, and also reduces weight.

[0045] In this invention, the adjusting and fixing ring 4 and the suture ring 1 are fixedly connected by a snap fastener.

[0046] For details, please refer to Figures 2 to 7 The suture ring 1 includes a suture piece 101 and a retaining ring 102 extending axially from the side of the suture piece 101 facing the adjusting and fixing ring 4. The adjusting and fixing ring 4 is provided with a plurality of elastic claws 401, and the plurality of elastic claws 401 are all snapped onto the retaining ring 102.

[0047] Preferably, in this embodiment, there are, but not limited to, five elastic claws 401, which are integrally connected in a ring at equal intervals on the upper side of the connecting ring 402.

[0048] See Figure 4 , Figure 6 and Figure 7Each of the five elastic claws 401 includes a connecting portion 4011 extending axially from the side of the adjusting and fixing ring 4 facing the suture ring 1 (i.e., the upper side of the connecting ring 402) and a hook portion 4012 connected to the upper end of the connecting portion 4011. The hook tips of the hook portions 4012 are all set towards the central axis of the adjusting and fixing ring 4. The retaining ring 102 has five retaining grooves 1021 around its outer circumference that correspond one-to-one with the five elastic claws 401, and the hook portions 4012 are engaged in the corresponding retaining grooves 1021.

[0049] The fixation between the blood pump connection assembly and the apical suture assembly of the present invention is achieved by using the five elastic claws 401 of the adjusting fixing ring 4 and the five slots 1021 of the retaining ring 102 to form a snap-fit ​​connection. This structure is simple and efficient to operate, greatly reducing the difficulty of connection during surgery, enabling rapid connection, shortening operation time, and reducing the risk of surgery.

[0050] In this invention, the top edge of the inner side of the hook tip of the hook portion 4012 is chamfered, and the bottom edge of the outer side of the retaining ring 102 is also chamfered. When the adjusting fixing ring 4 is connected to the retaining ring 102, the elastic claw 401 moves upward from the bottom of the retaining ring 102. Under the oblique cutting action of the chamfer, the elastic claw 401 undergoes elastic deformation outward, and can then slide upward into the retaining groove 1021 to achieve a fixed connection.

[0051] It is worth mentioning that the outer side of the connecting part 4011 is provided with an arc-shaped groove 40111, which makes the width of the connecting part 4011 gradually increase from the middle to the upper and lower ends, thereby reducing stress and making it easier for the elastic claw 401 to be engaged in the slot 1021, making the operation more labor-saving and convenient, and also reducing weight.

[0052] As another important improvement of this invention, see [link / reference] Figure 3 The apical suture assembly also includes an elastic inner suture ring 5, which is also made of, but not limited to, polyester fabric. The inner suture ring 5 is disposed within the retaining ring 102, and the inner suture ring 5 is press-fitted with the inlet tube 3 so that the inner ring of the inner suture ring 5 can seal against the outer wall of the inlet tube 3, further preventing apical leakage of the heart.

[0053] See Figure 4 and Figure 7A retaining ring 102 is vertically connected to the middle of the lower side of the suture piece 101, dividing the suture piece 101 into an inner ring piece 1011 and an outer ring piece 1012. The inner ring piece 1011 has a plurality of equally spaced inner suture holes 10111. An inner suture ring 5 is sewn onto the lower side of the suture piece 101 through these inner suture holes 10111 using surgical sutures, with the outer peripheral wall of the inner suture ring 5 abutting against the inner peripheral wall of the retaining ring 102. The outer ring piece 1012 has a plurality of equally spaced outer suture holes 10121. An outer suture ring 2 is sewn onto the upper side of the suture piece 101 through these outer suture holes 10121 using surgical sutures.

[0054] In addition, the blood pump connection assembly also includes a pressure ring 6, which is welded to the top of the connecting ring 402 of the adjusting and fixing ring 4 and is located between five elastic claws 401. When the adjusting and fixing ring 4 is engaged with the suture ring 1, the pressure ring 6 cooperates with the inner ring plate 1011 to press the inner suture ring 5 so that the inner suture ring 5 can fit tightly with the inlet tube 3.

[0055] Traditional ventricular connection devices rely solely on polyester pads for single-layer leak prevention, failing to achieve dual leak prevention. This invention, however, utilizes both the outer suture ring 2 and the inner suture ring 5, which, in conjunction with the inlet tube 3, achieve a double-seal effect, providing double leak prevention and reducing surgical risks.

[0056] See Figure 5 and Figure 6 The adjusting fixing ring 4 and the pressure ring 6 are each provided with several hollow holes 460 around their respective circumferences to reduce weight and reduce the burden on the patient. At the same time, they can also reduce the stress on the parts and thus increase the operability of the parts.

[0057] In this invention, the suture ring 1, the adjusting and fixing ring 4, the pressure ring 6, the screw 7, and the washer 8 are all made of titanium alloy.

[0058] Before installation, the outer suture ring 2 and the inner suture ring 5 are sewn onto the suture ring 1 to form an integral apical suture assembly; the pressure ring 6 is welded to the adjusting and fixing ring 4, and the screw 7 and washer 8 are also pre-installed on the adjusting and fixing ring 4 to form an integral blood pump connection assembly. The installation process of this embodiment is as follows:

[0059] First, the thickness of the patient's apical myocardium is measured using equipment such as ultrasound. Next, the optimal insertion depth of the inlet tube 3 is determined based on the apical myocardial thickness, which determines the position of the blood pump connection assembly on the inlet tube 3. The blood pump connection assembly is then fitted onto the inlet tube 3, and the screw 7 is tightened at the determined position to lock the blood pump connection assembly and the inlet tube 3 in place. Afterward, the apical suture assembly is sutured to the apex of the heart. Specifically, the outer suture ring 2 is placed against the outer side of the apex of the heart, and surgical sutures are used to suture the outer suture ring 2 through the outer suture hole 10121 of the suture ring 1. Then, an apical punch is used to punch a hole on the apex of the heart at a position directly opposite the inner hole of the suture ring 1. Finally, the inlet tube 3 is inserted into the ventricle through the apical suture assembly until the adjusting and fixing ring 4 is secured to the suture ring 1, completing the installation.

[0060] Example 2

[0061] See Figure 8 and Figure 9 The difference between this embodiment and Embodiment 1 is that the adjustment method of the blood pump connection component is different.

[0062] Specifically, in this second embodiment, the adjusting and fixing ring 4 has no clamp 403. The adjusting and fixing ring 4 is provided with a connecting ring 402 at the top and a threaded ring at the bottom. Similarly, five elastic claws 401 are integrally connected to the upper side of the connecting ring 402 in a ring with equal spacing. The threaded ring is a closed circular ring, and its upper side is integrally connected to the lower side of the connecting ring 402. The threaded ring is provided with an internal threaded hole 405. The outer wall of the lower half of the inlet pipe 3 is provided with an external thread 301. The external thread 301 matches the internal threaded hole 405. The adjusting and fixing ring 4 is threadedly connected to the inlet pipe 3 through the engagement of the internal threaded hole 405 and the external thread 301.

[0063] The outer circumference of the threaded ring is also provided with an external hexagon, so as to operate and adjust the rotation of the fixed ring 4 on the inlet pipe 3.

[0064] In this second embodiment, the fastener is nut 9, which is threaded onto the inlet pipe 3 at the bottom of the adjusting and fixing ring 4 and is used to lock the adjusting and fixing ring 4.

[0065] The installation process for this second embodiment is as follows:

[0066] Similar to the previous embodiment, the thickness of the patient's apical myocardium is first measured to determine the optimal insertion depth of the inlet tube 3, i.e., to determine the position of the blood pump connection assembly on the inlet tube 3. Next, the nut 9 is threaded onto the inlet tube 3, and then the adjusting ring 4 is threaded onto the inlet tube 3 and positioned in the determined position. Then, the nut 9 is rotated to tighten the adjusting ring 4, fixing its position. After that, similar to the previous embodiment, the apical suture assembly is sutured onto the apex of the heart and a hole is punched. Finally, the inlet tube 3 is inserted into the ventricle through the apical suture assembly until the adjusting ring 4 is snapped onto the suture ring 1, completing the installation.

[0067] Therefore, the adjustable ventricular connection device of the present invention, by comprising an apical suture assembly and a blood pump connection assembly, includes an adjusting and fixing ring 4 and a fastener. The adjusting and fixing ring 4 is fitted onto the inlet tube 3 and fixedly connected to the suture ring 1 of the apical suture assembly. The fastener is used to secure the adjusting and fixing ring 4 to the inlet tube 3. By loosening the fastener, the position of the adjusting and fixing ring 4 on the inlet tube 3 can be adjusted, thereby adjusting the position of the apical suture assembly and the blood pump connection assembly on the inlet tube 3. The optimal insertion depth of the inlet tube 3 into the ventricle can be adjusted according to the myocardial thickness of different patients, achieving individualized treatment and meeting the needs of patients with different myocardial thicknesses, thus improving the success rate and effectiveness of heart failure treatment surgery. The fixation between the blood pump connection assembly and the apical suture assembly utilizes an adjusting ring 4. The five elastic claws 401 of the fixing ring 4 and the five slots 1021 of the retaining ring 102 form a snap-fit ​​connection. This structure is simple and efficient to operate, greatly reducing the difficulty of connection during surgery, enabling rapid and reliable connection, shortening operation time, and reducing surgical risks. At the same time, the invention also installs an inner suture ring 5 inside the suture ring 1. By utilizing the sealing cooperation between the outer suture ring 2 and the inner suture ring 5 and the inlet tube 3, a double sealing effect can be achieved, achieving the purpose of double leakage prevention, playing a double insurance role, and reducing surgical risks. The adjustable ventricular connection device of the invention is simple and efficient to manufacture and assemble. The parts are small in size and light in weight, reducing the burden on patients and increasing the success rate of surgery. The blood pump connection component has two adjustment methods, namely clamp type and threaded type, which are simple, safe and effective to adjust.

[0068] Many specific details have been set forth in the foregoing description to provide a thorough understanding of the present invention. However, the above description is merely a preferred embodiment of the present invention, and the present invention can be implemented in many other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed above. Furthermore, any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, using the methods and techniques disclosed above, without departing from the scope of the present invention. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, shall still fall within the protection scope of the present invention.

Claims

1. An adjustable ventricular connection device for mounting a blood pump at the apex of the heart, characterized in that, include: An apical suture assembly for suturing to the apex of the heart, the apical suture assembly includes a suture ring (1) and an outer suture ring (2) and an inner suture ring (5), both of which are elastic. The outer suture ring (2) is fixedly connected to the suture ring (1) and is fitted onto the inlet tube (3) of the blood pump. The inner ring of the outer suture ring (2) is sealed against the outer wall of the inlet tube (3). The blood pump connection assembly includes an adjusting and fixing ring (4), a fastener, and a pressure ring (6). The adjusting and fixing ring (4) is fitted onto the inlet tube (3) and fixedly connected to the suture ring (1). The fastener is used to fasten the adjusting and fixing ring (4) onto the inlet tube (3), and the position of the adjusting and fixing ring (4) on the inlet tube (3) can be adjusted by loosening the fastener. The suture ring (1) includes a suture piece (101) and a retaining ring (102) extending axially from the side of the suture piece (101) facing the adjusting and fixing ring (4). The adjusting and fixing ring (4) is provided with a plurality of elastic claws (401) arranged in a ring and spaced apart. The plurality of elastic claws (401) are all snapped onto the retaining ring (102). The inner suture ring (5) is disposed inside the retaining ring (102) and its inner ring is sealed and attached to the outer wall of the inlet pipe (3). The pressure ring (6) is fixed on the adjusting and fixing ring (4) and is located between the plurality of elastic claws (401). The suture piece (101) is divided into an inner ring piece (1011) and an outer ring piece (1012) with the retaining ring (102) as the dividing line. The pressure ring (6) cooperates with the inner ring piece (1011) to press the inner suture ring (5).

2. The adjustable ventricular connection device according to claim 1, characterized in that: Each of the elastic claws (401) includes a connecting portion (4011) extending axially from the side of the adjusting and fixing ring (4) facing the suture ring (1) and a hook portion (4012) connected to the end of the connecting portion (4011). The outer side of the connecting portion (4011) is provided with an arc-shaped groove (40111) so that the width of the connecting portion (4011) gradually increases from the middle to the upper and lower ends. The outer periphery of the retaining ring (102) is provided with a plurality of slots (1021) corresponding one-to-one with the plurality of elastic claws (401), and the hook portion (4012) is engaged in the corresponding slot (1021).

3. The adjustable ventricular connection device according to claim 1, characterized in that: The inner ring (1011) is provided with a plurality of inner suture holes (10111) at intervals in a ring. The inner suture ring (5) is sewn to one side of the suture piece (101) through the plurality of inner suture holes (10111). The outer ring (1012) is provided with a plurality of outer suture holes (10121) at intervals in a ring. The outer suture ring (2) is sewn to the other side of the suture piece (101) through the plurality of outer suture holes (10121).

4. The adjustable ventricular connection device according to claim 1, characterized in that: The adjusting fixing ring (4) and the pressure ring (6) are each provided with a number of hollow holes (460) around their respective circumferences.

5. The adjustable ventricular connection device according to claim 1, characterized in that: The adjusting and fixing ring (4) is also provided with a connecting ring (402) and a clamp (403). Several elastic claws (401) are integrally connected to one side of the connecting ring (402). The clamp (403) has a fixed section (4031) and an adjustable section (4032) that are both arc-shaped. The fixed section (4031) is integrally connected to the other side of the connecting ring (402). A partition hole is provided between the adjustable section (4032) and the other side of the connecting ring (402). (404) They do not contact each other, and one end of the adjustable section (4032) is integrally connected to one end of the fixed section (4031), and a notch (4033) is provided between the other end of the adjustable section (4032) and the other end of the fixed section (4031); the fastener is a screw (7), and the screw (7) is connected to the other end of the adjustable section (4032) and the other end of the fixed section (4031) to adjust the internal diameter of the clamp (403).

6. The adjustable ventricular connection device according to claim 5, characterized in that: The other end of the adjustable section (4032) is provided with a through hole, and the other end of the fixed section (4031) is provided with a screw hole opposite to the through hole. A washer (8) is provided in the notch (4033), and the screw (7) passes through the through hole and the washer (8) and is threaded into the screw hole.

7. The adjustable ventricular connection device according to any one of claims 1 to 5, characterized in that: The adjusting and fixing ring (4) is provided with an internal threaded hole (405), and the outer wall of the inlet pipe (3) is provided with an external thread (301). The adjusting and fixing ring (4) is threadedly connected to the inlet pipe (3). The fastener is a nut (9), which is threadedly connected to the inlet pipe (3) and locks the adjusting and fixing ring (4).

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