A ventricular connection device

Abstract

The utility model provides a kind of ventricle connecting device, belong to medical instrument application technical field.It solves the problem that connecting piece is soft but strength is not enough, connecting process is relatively complex, leading to low connection efficiency, increase operation time, increase operation risk problem.A kind of ventricle connecting device, the ventricle connecting device includes three mutually matched connecting pieces, fastener and suture piece, the ventricle connecting device is fixed on myocardium by suture piece, the connecting piece is used to connect suture piece and install inflow pipe of blood pump, the fastener will inflow pipe of blood pump be fixed in connecting piece.It has the advantages of guaranteeing blood pump connection strength, improving blood pump connection efficiency, thereby shortening blood pump implantation operation time, reducing operation risk.

Description

Technical Field

[0001] This utility model relates to the field of medical device application technology, specifically a ventricular connection device. Background Technology

[0002] A blood pump, also known as an artificial heart, can serve as a bridge to heart transplantation, extending the patient's waiting time, or it can be worn long-term as a treatment terminal. During blood pump implantation surgery, a ventricular connector is used to secure the blood pump to the myocardial tissue on the surface of the heart. The ventricular connector is sutured to the myocardial tissue using sutures. Therefore, the sutures need to be soft yet strong enough to achieve a stable connection between the ventricular connector and the myocardial tissue without damaging the myocardial tissue. Simultaneously, the connection process needs to be simple and efficient, resulting in a good seal after connection. Utility Model Content

[0003] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a ventricular connection device that ensures the strength of the blood pump connection, improves the efficiency of the blood pump connection, thereby shortening the blood pump implantation surgery time and reducing surgical risks. It solves the problems of soft but not strong connectors, complex connection processes, resulting in low connection efficiency, increased surgery time, and increased surgical risks.

[0004] (II) Technical Solution To achieve the aforementioned goals of ensuring the strength and efficiency of the blood pump connection, thereby shortening the blood pump implantation surgery time and reducing surgical risks, this utility model provides the following technical solution: a ventricular connection device, comprising three mutually cooperating connectors, fasteners, and sutures. The ventricular connection device is fixed to the myocardium by the sutures. The connectors are used to connect the sutures and the inflow tube of the blood pump, and the fasteners fix the inflow tube of the blood pump in the connectors.

[0005] Preferably, the blood pump includes a blood pump body and an inlet pipe connected to the inlet of the blood pump body, wherein an outer conical surface and a limiting strip are provided on the outer surface of the inlet pipe.

[0006] Preferably, the connector has an inner hole with an inner conical surface. When the inflow pipe is inserted into the inner hole, the inner conical surface and the outer conical surface form a conical fit.

[0007] Preferably, the connector is provided with an external thread, which is a pipe thread.

[0008] Preferably, the connector is provided with a fixing hole.

[0009] Preferably, the fastener has an internal thread, which is a pipe thread, and the internal thread forms a threaded engagement with the external thread of the connector.

[0010] Preferably, the fastener is provided with a positioning ring, which is disposed between the limiting strip of the inflow pipe and the inlet of the blood pump body. When the fastener is tightened to the external thread of the connector through the internal thread, the thread cannot be tightened further when the positioning ring contacts the limiting strip.

[0011] Preferably, the stitching includes an outer stitched hem and an inner stitched hem.

[0012] Preferably, the sewn piece is at least one layer of polyester fiber felt. When it is multi-layer polyester fiber felt, the outer sewn hem and the inner sewn hem form an integral sewn piece.

[0013] Preferably, the sewn piece and the connector are sewn together as a whole through the fixing hole, and the inner hole of the connector is aligned with the inner sewn hem.

[0014] (III) Beneficial Effects Compared with the prior art, the present invention provides a ventricular connection device with the following advantages: This ventricular connection device utilizes a blood pump and the ventricular connection mechanism in conjunction. During the procedure, the suture is first sewn along the outer suture hem onto the myocardial tissue on the surface of the heart, thus completing the overall fixation of the suture and connection device to the heart. Then, a circular hole is made on the heart surface along the inner hole of the connection device using a scalpel, and the inflow tube of the blood pump is inserted into the inner hole of the connection device. Because the fastener has an internal thread (a pipe thread), during the insertion of the inflow tube into the inner hole of the connection device, the internal thread of the fastener and the external thread of the connection device form a threaded engagement. When the thread is not tightened, the blood pump can rotate along the axis of the inflow tube, achieving the purpose of adjusting the blood pump's position. When the thread is tightened until the positioning ring contacts the limiting strip, the thread cannot be tightened further, the inflow tube is installed in place, and the blood pump is fixedly connected to the heart.

[0015] As described above, the ventricular connection device of this patent only requires suturing the suture to the surface of the heart and then connecting it via a threaded connection. Simply rotating the fastener to the fixed position achieves the secure connection between the blood pump and the heart. The entire process is simple, requiring no additional tools such as screwdrivers or wrenches. Furthermore, the blood pump's position can be adjusted in real time during installation, facilitating surgical procedures. The suture material used is polyester fiber felt, a commonly used material in cardiac surgery, which promotes fibrosis and device stability. Moreover, it eliminates the need for developing specialized materials, reducing operating costs. After fixation, the outer conical surface of the inflow tube and the inner conical surface of the connector form a conical fit. The conical contact generates friction, further preventing the inflow tube from loosening or falling off under pressure, increasing the fixation strength. Simultaneously, the conical fit creates a sealed space, preventing blood from flowing out between the inflow tube and the inner hole of the connector, increasing sealing. This achieves the effects of ensuring the blood pump connection strength, improving blood pump connection efficiency, shortening the blood pump implantation surgery time, and reducing surgical risks. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the assembly of a blood pump and a ventricular connection device according to the present invention; Figure 2 This is a schematic diagram of a ventricular connection device according to the present invention, installed on an inflow pipe; Figure 3 This is a cross-sectional view of a ventricular connection device of the present invention, installed on an inflow pipe; Figure 4 This is a schematic diagram of the structure of a ventricular connection device according to the present invention; Figure 5 This is an exploded view of a ventricular connection device according to the present invention. Figure 6 This is a cross-sectional view of a connector for a ventricular connection device according to this utility model; Figure 7 This is a schematic diagram of the inflow pipe installation of a ventricular connection device according to this utility model.

[0017] In the picture: 1. Blood pump; 11. Blood pump body; 12. Inflow tube; 121. Outer conical surface; 122. Limiting strip; 2. Ventricular connection device; 21. Connector; 211. Inner hole; 212. Inner conical surface; 213. External thread; 214. Fixing hole; 22. Fastener; 221. Internal thread; 222. Positioning ring; 23. Suture; 231. Outer suture skirt; 232. Inner suture skirt; Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-7 A ventricular connection device, characterized in that: the ventricular connection device 2 includes three mutually cooperating connectors 21, fasteners 22 and sutures 23.

[0020] The ventricular connection device 2 is fixed to the myocardium by a suture 23. The suture 23 serves as a connecting bridge between the ventricular connection device 2 and the myocardium. The suture 23 is fixed to the myocardium by surgical suturing, providing a stable attachment point for the entire device and ensuring that the device can be firmly placed in the required position, avoiding displacement or dislodgement during heartbeat.

[0021] The connector 21 is used to connect the suture 23 and the inflow tube 12 of the blood pump 1. The connector 21 is located between the suture 23 and the inflow tube 12 of the blood pump 1, and serves to connect the inflow tube 12. It connects the suture 23 fixed to the myocardium and the inflow tube 12 of the blood pump 1 together, so that blood can flow smoothly from the ventricle into the blood pump body 11.

[0022] Fastener 22 secures the inflow pipe 12 of blood pump 1 in connector 21. The function of fastener 22 is to firmly secure the inflow pipe 12 of blood pump 1 in connector 21, preventing the inflow pipe 12 from loosening or shifting under the impact of blood flow, and ensuring the stability and reliability of the connection between blood pump 1 and ventricle.

[0023] The blood pump 1 includes a pump body 11 and an inlet pipe 12 connected to the inlet of the pump body 11. The inlet pipe 12 serves as the inlet channel for the blood pump 1, guiding blood smoothly from the ventricle into the pump body 11. An outer conical surface 121 and a limiting strip 122 are provided on the outer surface of the inlet pipe 12. The outer conical surface 121 of the inlet pipe 12 mates with the inner conical surface 212 of the connector 21. When the inlet pipe 12 is inserted into the inner hole 211 of the connector 21, this conical surface mating achieves a tight connection, providing a good seal and preventing blood leakage at the connection point. Simultaneously, the outer conical surface 121 also serves a positioning function, ensuring that the inlet pipe 12 is accurately inserted into the connector 21, guaranteeing the accuracy and stability of the connection between the blood pump 1 and the ventricle. The limiting strip 122 is mainly used to limit the fastener 22 during installation. When the fastener 22 secures the inflow pipe 12 into the connector 21, the positioning ring 222 on the fastener 22 contacts the limiting strip 122. At this point, the threads cannot be tightened further, thus limiting the degree of tightening of the fastener 22. This not only ensures the accuracy of the installation position of the inflow pipe 12 but also avoids damage to components due to over-tightening, thus protecting the blood pump 1 and the ventricular connection device 2.

[0024] The connector 21 has an inner hole 211, and an inner conical surface 212 on the inner hole 211. When the inflow pipe 12 is inserted into the inner hole 211, the inner conical surface 212 and the outer conical surface 121 form a conical fit. The inner hole 211 on the connector 21 provides space for the blood pump 1 inflow pipe 12 to be inserted. The inner conical surface 212 and the outer conical surface 121 on the outer surface of the inflow pipe 12 form a conical fit.

[0025] The connector 21 has an external thread 213, which is a pipe thread. The fastener 22 has an internal thread 221, which is also a pipe thread. The internal thread 221 and the external thread 213 of the connector 21 form a threaded engagement. The fastener 22 is first fitted under the limiting strip 122 on the inflow pipe 12. As the inflow pipe 12 is inserted into the inner hole 211 of the connector 21, the fastener 22 gradually moves closer to the connector 21. Subsequently, the fastener 22 and the connector 21 are fixedly connected together through the threaded connection between them. This connection method is simple and reliable, greatly improving installation efficiency.

[0026] The connector 21 has a fixing hole 214. The suture 23 and the connector 21 are sewn together as a whole through the fixing hole 214, and the inner hole 211 of the connector 21 is aligned with the inner suture skirt 232. The main function of the fixing hole 214 is to provide a fixing point for the connection between the connector 21 and the suture 23. By passing the suture through the fixing hole 214, the suture 23 and the connector 21 are sewn together as a whole, forming a stable connection between them. This ensures that the suture 23 and the connector 21 will not shift relative to each other during the use of the ventricular connection device 2, thereby ensuring the stability and reliability of the entire device. Since the inflow tube 12 needs to be inserted into the inner hole 211 of the connector 21 and pass through the suture 23 before entering the heart, the inner hole 211 and the inner suture skirt 232 need to be aligned so that the inflow tube 12 can be smoothly inserted into the heart without being obstructed by misalignment.

[0027] The fastener 22 is equipped with a positioning ring 222, which is positioned between the limiting strip 122 of the inflow pipe 12 and the inlet of the blood pump body 11. When the fastener 22 is tightened onto the external thread 213 of the connector 21 via its internal thread 221, the thread cannot be tightened further when the positioning ring 222 contacts the limiting strip 122. When installing the blood pump 1 inflow pipe 12 onto the connector 21, the operator gradually tightens the fastener 22 by rotating it, utilizing the engagement between the internal thread 221 and the external thread 213 of the connector 21. When the positioning ring 222 contacts the limiting strip 122 on the inflow pipe 12, it forms a physical barrier, preventing further tightening of the thread. This avoids damage to the inflow pipe 12, connector 21, or other related components due to over-tightening, and also indicates that the inflow pipe 12 is now completely fixed within the connector 21.

[0028] The suture 23 includes an outer suture skirt 231 and an inner suture skirt 232. The outer suture skirt 231 is located on the outside of the suture 23 and its main function is to provide a larger suture area and contact area when suturing the suture 23 to tissues such as myocardium. The inner suture skirt 232 is located on the inside of the suture 23 and is aligned with the inner hole 211 of the connector 21. Its main function is to provide accurate positioning for the blood pump 1 inlet tube 12.

[0029] The suture 23 is at least one layer of polyester fiber felt. When it is multi-layered polyester fiber felt, the entire suture 23 is formed by an outer suture skirt 231 and an inner suture skirt 232. Polyester fiber felt has good biocompatibility, meaning it has less interaction with human tissue, which can reduce the immune rejection response of the human body to the suture 23, reduce the occurrence of inflammation and other adverse reactions, and facilitate the long-term stable operation of the device in the body. When the suture 23 is composed of multi-layered polyester fiber felt, the layers work together. The multi-layered structure can increase the thickness and strength of the suture 23, improve its tear resistance and tensile strength, and better withstand the forces generated by cardiac contraction and relaxation. At the same time, the porous structure between the multi-layered polyester fiber felt can promote the penetration of tissue fluid and cell ingrowth, which is beneficial to tissue repair and regeneration, and further enhances the bonding force between the suture 23 and myocardial tissue.

[0030] Working principle: During the operation, the suture 23 is first sewn onto the myocardial tissue on the surface of the heart along the outer suture hem 231, thus completing the overall fixed connection between the suture 23 and the connector 21 and the heart. Then, a circular hole is made on the surface of the heart along the inner hole 211 of the connector 21 using a scalpel, and the inflow tube 12 of the blood pump 1 is inserted into the inner hole 211 of the connector 21. Since the fastener 22 has an internal thread 221, which is a pipe thread, during the process of inserting the inflow tube 12 into the inner hole 211 of the connector 21, the internal thread 221 of the fastener 22 and the external thread 213 of the connector 21 form a threaded engagement. When the thread is not tightened, the blood pump 1 can rotate along the axis of the inflow tube 12 to adjust the position of the blood pump 1. When the thread is tightened to the point that the positioning ring 222 contacts the limiting strip 122, the thread cannot be tightened further, the inflow tube 12 is installed in place, and the fixed connection between the blood pump 1 and the heart is achieved.

[0031] As can be seen from the above process, the ventricular connection device 2 of this patent only requires suturing the suture 23 to the surface of the heart, and then connecting it by thread. Simply rotating the fastener 22 to the fixed position is sufficient to achieve the fixed connection between the blood pump 1 and the heart. The whole process is simple to operate and does not require additional fixing tools such as screwdrivers and wrenches. Moreover, the position of the blood pump 1 can be adjusted in real time during the installation process, which is convenient for surgical operation. The suture 23 is made of polyester fiber felt, which is a commonly used material in cardiac surgery. It can promote fibrosis and stabilize the fixation device, and no additional special materials need to be developed, reducing the cost of use. After the fixation is completed, the outer conical surface 121 of the inflow tube 12 and the inner conical surface 212 of the connector 21 form a conical fit. The conical contact generates friction, which can further prevent the inflow tube 12 from loosening or falling off under pressure, increasing the fixation firmness. At the same time, the conical fit forms a sealed space, which can prevent blood from flowing out between the inflow tube 12 and the inner hole 211 of the connector 21, increasing the sealing performance. This achieves the effects of ensuring the connection strength of blood pump 1, improving the connection efficiency of blood pump 1, thereby shortening the blood pump 1 implantation surgery time and reducing surgical risks.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A ventricular connection device, characterized in that: The ventricular connection device (2) includes three interconnected connectors (21), fasteners (22), and sutures (23). The ventricular connection device (2) is fixed to the myocardium by the sutures (23). The connectors (21) are used to connect the sutures (23) and the inflow tube (12) of the blood pump (1). The fasteners (22) fix the inflow tube (12) of the blood pump (1) in the connectors (21). The connectors (21) are provided with external threads (213), which are pipe threads. The fasteners (22) are provided with internal threads (221), which are pipe threads. The internal threads (221) and the external threads (213) of the connectors (21) form a threaded fit.

2. The ventricular connection device according to claim 1, characterized in that: The blood pump (1) includes a blood pump body (11) and an inflow pipe (12) connected to the inlet of the blood pump body (11). The outer surface of the inflow pipe (12) is provided with an outer conical surface (121) and a limiting strip (122).

3. A ventricular connection device according to claim 2, characterized in that: The connector (21) has an inner hole (211) and an inner conical surface (212) on the inner hole (211). When the inflow pipe (12) is inserted into the inner hole (211), the inner conical surface (212) and the outer conical surface (121) form a conical fit.

4. A ventricular connection device according to claim 1, characterized in that: The connector (21) is provided with a fixing hole (214).

5. A ventricular connection device according to claim 1, characterized in that: The fastener (22) is provided with a positioning ring (222). The positioning ring (222) is located between the limiting strip (122) of the inflow pipe (12) and the inlet of the blood pump body (11). When the fastener (22) is tightened to the external thread (213) of the connector (21) through the internal thread (221), the thread cannot be tightened further when the positioning ring (222) contacts the limiting strip (122).

6. A ventricular connection device according to claim 1, characterized in that: The stitching (23) includes an outer stitched hem (231) and an inner stitched hem (232).

7. A ventricular connection device according to claim 6, characterized in that: The stitched piece (23) is at least one layer of polyester fiber felt. When it is a multi-layer polyester fiber felt, the overall stitched piece (23) is formed by the outer stitched skirt (231) and the inner stitched skirt (232).

8. A ventricular connection device according to claim 6, characterized in that: The sewing piece (23) and the connector (21) are sewn together as a whole through the fixing hole (214), and the inner hole (211) of the connector (21) is aligned with the inner sewing hem (232).

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