RU2502U1 - BIOPROTHESIS FOR BLOOD CIRCULATION - Google Patents

Abstract

A circulatory prosthesis comprising a blood pumping device made in the form of a peristaltic pump, the tube of which is divided into chambers by one-way valves fixed to it, and a transceiver device made in the form of a transmitting winding connected to a power source and a receiving winding, the terminals of which are connected to the inputs of the control device of electromagnets with pressure cores, characterized in that the valves are xeno-aortic pork valves with excised sinuses Ba llsalva, the pump tube is made of biological material, is installed inside the silicone rubber cylinder and attached to it with its peripheral ends, at the level of the fibrous ring of each valve, rigid rings are mounted between the cylinder and the tube, fixed to the latter, while the pressure cores are located outside the cylinder in places the location of the cameras.

Description

BIOPROTHESIS FOR BLOOD CIRCULATION

The utility model relates to medicine, namely to prosthetics, and can be used to improve blood circulation of individual organs, in particular the heart.

Known prosthesis for blood circulation (RF Patent N 2008925, class MKI A 61 M 1/10, 1994.)) consisting of a device for pumping blood, made in the form of a peristaltic pump, the tube of which is divided into chambers with one-way mechanical valves, and a movement mechanism this pump.

This device uses mechanical valves that lack hemocompatibility (trauma to blood cells). When implanting such prostheses, patients require lifelong anticoagulation therapy.

The task is to increase the hemocompatibility of the prosthesis. The task is achieved through the use of xeno-aortic pork valves with excised Valsalva sinuses and the implementation of the inner layer of the pump tube from biological material. Figure 1 shows a diagram of a bioprosthesis. A bioprosthesis consists of a device for pumping blood in the form of a peristaltic pump. The tube 1 of the pump is divided into chambers by one-way valves 2, represented by xeno-aortic valves with excised Valsalva sinuses. The pump tube is made of biological material, for example, calf pericardium, and is installed inside the silicone rubber cylinder 3. The peripheral ends of the tube are fixed to the cylinder. At the level of the fibrous ring of each valve, rigid rings 4 are mounted on the tube between the cylinder and the tube. Outside the cylinder, electromagnets with pressure

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cores 5.

The pressure cores are controlled by the electromagnet control device 6. The power of the control device is carried out through the receiving winding 7. All the listed devices are inside the body, the transmitting winding 8 with the power supply 9 is located outside.

A prosthesis for blood circulation works as follows. Blood flows through the inlet pipe into the tube of the pump 1. Then, the pressure cores 5 are compressed by the tube 1, the corresponding valve 4 is closed, and the blood is pumped through another valve and the outlet pipe into the patient's circulatory system. After that, the cores 5 are unclenched, due to the elasticity of the silicone balloon 3 in the middle part of the tube 1, a vacuum is created, the valve 4 located at the outlet pipe is blocked, preventing the return flow of blood, and the inlet valve opens, providing an influx of a new portion of blood, after which the cycle repeats. Blood flow speed is controlled by changing the frequency of compression of the tube 1 by the pressure cores 5. The device 6 controls and delivers energy, it is supplied with energy from the receiving winding 7 by a non-contact method using the transmitting winding 8 with a power source 9. The compression frequency of the bioprosthesis tube 1 can be synchronized with ECG teeth using device 6. An example of a specific implementation.

The bioprosthesis for blood circulation consists of a tube, which is a balloon made of thin elastic silicone rubber, inside of which there is a tube made of biological material, sewn with a continuous double twisted seam atraumatic suture

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material. As the biological material used calf pericardium, stabilized by standard methods. Inside the tube there are two biological valves, which are stabilized xeno-aortic pork valves with excised Valsalva sinuses, leaving a 2 mm wide border on the ventricular and aortic sides, for which they are sutured with atraumatic suture material to the tube made of biological material.

The volume of the tube between the valves is selected depending on the diameter of the valves equal to 80 ml, which corresponds to the volume of the left ventricle.

To prevent deformation of the valves, when squeezed by electromagnets at the level of the fibrous rings of the valves, rigid support rings made of polypropylene are located inside the silicone cylinder, hemmed to the pericardium and ensure valve stability, regardless of the compression of the tube. Silicone rubber serves to protect the pericardium from the mechanical effects of electromagnets, which can cause damage to the pericardium for a long time, as well as for passive expansion of the tube due to the elastic properties of the rubber after squeezing it. Electromagnets compress the tube without completely blocking its lumen (non-occlusive compression), but only by 80-90%, which reduces the mechanical trauma of the blood. Silicone rubber tightly tightens the pericardial tube and is attached by suturing it with atraumatic suture material. The ends of the tube are made in the form of a truncated cone formed from xenopericardium and silicone rubber. The cannulas used to connect the cardiopulmonary bypass are the system outlet openings, which makes it easy and convenient to carry out cannulation of blood vessels to connect the device to the patient’s bloodstream.

The use of two such prostheses connected according to the circuit of the left and right ventricles allows you to temporarily completely or partially replace the function of the heart or significantly reduce the load on the myocardium, which will restore normal contractile function of the heart.

The use of a prosthesis of a smaller diameter can improve the perfusion of other organs (for example, kidneys) suffering from ischemia, which will improve their metabolism and partially or fully restore their function.

The use of biological tissues from which the prosthesis is made makes it possible to reduce the traumatic effect on the blood, to ensure a longer functioning of the prosthesis and the functions of its own organs by improving their blood circulation. In general, this will make it possible to rehabilitate previously untreatable patients.

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Claims (1)

A circulatory prosthesis comprising a blood pumping device made in the form of a peristaltic pump, the tube of which is divided into chambers by one-way valves fixed to it, and a transceiver device made in the form of a transmitting winding connected to a power source and a receiving winding, the terminals of which are connected to the inputs of the control device of electromagnets with pressure cores, characterized in that the valves are xeno-aortic pork valves with excised sinuses Ba llsalva, the pump tube is made of biological material, is installed inside the silicone rubber cylinder and attached to it with its peripheral ends, at the level of the fibrous ring of each valve, rigid rings are mounted between the cylinder and the tube, fixed to the latter, while the pressure cores are located outside the cylinder in places the location of the cameras.