CN106310411A - Ascending aorta type ventricular assisting device - Google Patents

Abstract

The invention discloses an ascending aorta type ventricular assist device, which comprises inner and outer layers, both ends of the outer layer are connected with artificial blood vessels, and the top of the device is closed by an artificial valve or connected with an artificial valve during operation; and the inner and outer layers The two layers are connected to an air pump through a pipeline, and the part between the two layers can be inflated or inhaled synchronously with the heart by means of the air pump and the pacing wire connected to the air pump; wherein, the outer layer is made of hard silicone material, The inner layer is soft cystic material. The ascending aorta type ventricular assist device of the present invention can increase coronary blood supply, improve heart function of patients with end-stage heart disease, prolong the survival time of such patients, and improve the quality of life of such patients.

Description

ascending aortic ventricular assist device

technical field

The invention relates to a ventricular assist device, in particular to an ascending aorta type ventricular assist device.

Background technique

At present, one of the clinically recognized and effective means of treating end-stage heart disease is heart transplantation. However, due to the severe scarcity of heart donors, it is difficult to meet clinical needs. At the same time, many problems such as immune rejection of patients after transplantation are difficult to solve. Transplantation has never been the most commonly used treatment. In recent years, as the technology of artificial heart has matured day by day, coupled with its various advantages such as no ethical issues, no immune rejection and various problems caused by anti-rejection drugs, artificial heart has become an important alternative to heart transplantation. Artificial hearts can be divided into total artificial hearts and ventricular assist devices according to their uses. Among them, total artificial hearts are due to their large size, complicated implantation techniques, and high incidence of postoperative complications such as infection, embolism, hemolysis, and multiple organ failure. Defects such as poor durability limit its clinical promotion and application, and the current ventricular assist device also has the same problem of destroying the original myocardial tissue of the heart when it is implanted, and there is no pulsating blood flow, blood cell destruction, and left atrium when the device is working. And the left ventricle is always in a filling state and the built-in pump cannot be replaced in time after failure. Another clinical method that is more commonly used to improve cardiac function is the application of intra-aortic balloon pump (IABP). However, due to the limited capacity of the balloon, the incidence of bleeding events is high, and femoral artery catheters are required to restrict activities. It may also cause arterial perforation, dissection, and peripheral arterial thrombosis so that it can only be used as a short-term and temporary treatment, but cannot be used for a long time. Recently, a ventricular assist device called C-Pulse produced by Sunshineheart Company of the United States is based on the principle that the inflated balloon around the aorta regularly compresses the ascending aorta to generate pulsating blood flow and thereby increase cardiac output. It has better solved various problems that may have occurred in the previous ventricular assist device, but because the structure around the ascending aorta is relatively tight, the operable space is small during implantation surgery, and it is difficult to fix; and because the device works through the aortic vessel At the same time, if the patient's aortic wall has inherent damage such as calcification, C-Pulse will inevitably cause further damage to it when working.

Therefore, there is an urgent need for a new type of treatment device or method to treat end-stage heart disease without reducing the treatment effect, and at the same time reduce the incidence of adverse events in use, alleviate or avoid various possible problems, and then improve the end-stage disease. The treatment effect of patients with end-stage heart disease can prolong the use time of cardiac assist devices to a certain extent.

Contents of the invention

In view of the various problems above, the technical problem to be solved by the present invention is to provide a heart assist device with a new structure so as to improve the treatment effect of end-stage heart disease patients.

In order to achieve the above-mentioned purpose, the present invention provides a kind of ascending aorta type ventricular assist device, comprises inner and outer two layers, and artificial blood vessel is connected at both ends of outer layer, so that be connected with patient's great blood vessel, and the top of this device is closed by artificial valve or The artificial valve is connected during the operation; and the inner and outer layers are connected to an air pump through a pipeline, and the part between the two layers can be inflated or inhaled synchronously with the heart by means of the air pump and the pacing wire connected to the air pump ; Wherein, the outer layer is made of hard silica gel material, and the inner layer is made of soft cystic material.

Wherein, when in use, the air pump is set outside the body; the device is configured to close the artificial valve or the end connected to the artificial valve is configured to coincide with the distal end of the ascending aorta; the end of the device not provided with the artificial valve is configured to coincide with the The proximal end of the aorta is anastomosed.

The difference between the present invention and the prior art is that the present invention has achieved the following technical effects: the ascending aortic ventricular assist device of the present invention has no myocardial surgical injury during implantation, and the blood flow is pulsating when the device is working, and no anticoagulation is required. , blood cells are not destroyed, the left atrium and left ventricle are intermittently empty, the external pump can be used as a backup, it is easy to replace in time after failure, and can be placed for a long time. The local anatomical space basically meets the device implantation. The advantage of no stringent requirements for mural vascular conditions. At the same time, if it is a patient with total heart failure, a new type of ascending aortic ventricular assist device in the main pulmonary artery can be placed to improve the right heart function. Ultimately, the application of the new ascending aortic ventricular assist device can increase the coronary blood supply, improve the cardiac function of patients with end-stage heart disease, prolong the survival time of such patients, and improve the quality of life of such patients. If the patient's heart function returns to normal after a period of treatment, the device can be stopped at any time to restore normal circulation.

The ascending aortic ventricular assist device of the present invention will be further described below in conjunction with the accompanying drawings.

Description of drawings

Fig. 1 is a schematic cross-sectional structure diagram of an ascending aortic ventricular assist device of the present invention;

Fig. 2 is a schematic diagram of the deflated state when using the ascending aortic ventricular assist device of the present invention;

Fig. 3 is a schematic diagram of the inflation state when using the ascending aortic ventricular assist device of the present invention.

Explanation of reference signs: 100-Ascending aortic ventricular assist device; 102-Outer layer; 104-Inner layer; 103-Part between inner and outer layers; 105-Artificial valve; 106-Artificial blood vessel; Air pump; 200‐ascending aorta; 300‐aortic valve; 400‐brachiocephalic trunk; 600‐left common carotid artery; 800‐left subclavian artery.

detailed description

The above-mentioned and other technical features and advantages of the present invention will be described in more detail below in conjunction with the embodiments.

Please refer to Fig. 1, the ascending aorta type ventricular assist device 100 of the present invention comprises a hard silicone material outer layer 102, a soft cystic material inner layer 104, and the two ends of the outer layer 102 are connected with artificial blood vessels 106 for use with autologous blood vessels Perform an anastomosis. The top of the device 100 is closed by an artificial valve 105 or is connected to an artificial valve during operation; and the inner and outer layers are connected to the air pump 108 through a pipeline 107, and the part between the two layers can be controlled by the air pump 108 and the pacing lead connected to the air pump. 103 performs inflation or inspiration synchronously with the heart.

The ascending aorta type ventricular assist device of the present invention can be implanted into the patient's body through the following method: the patient undergoes a median thoracotomy under general anesthesia combined with intravenous and inhalation. Establish extracorporeal circulation, clamp the aortic blocking forceps as far as possible at the position near the brachial trunk 400 at the distal end of the ascending aorta 200 . The aortic root is perfused with cardioplegia to stop the heart, and then the ascending aorta 200 is resected, and the ascending aorta type ventricular assist device 100 of the present invention is used to replace the ascending aorta 200 . The proximal end of the ascending aorta type ventricular assist device of the present invention (that is, the end without an artificial valve) is anastomosed with the proximal end of the ascending aorta; The distal end of the artery is anastomosed, and the air pipeline 107 is led out of the body through the patient's left second intercostal space near the opening of the sternum and connected to the air pump 108 .

Please refer to FIG. 2 and FIG. 3 , which are respectively schematic diagrams of the deflated and inflated states when using the ascending aortic ventricular assist device of the present invention. When the heart contracts, the device inhales air through the external air pump 108 to form a certain negative pressure in the aorta, which can reduce the afterload of the heart to the greatest extent and better maintain the heart function. At the same time, due to the existence of the artificial valve, It can avoid the backflow of blood at the distal end of the aorta caused by air pump suction; when the heart relaxes, the device is inflated by the external air pump 108, the aortic valve 300 is closed, the artificial valve 105 is in an open state, and the inner layer 104 of the sac The inward compression of the elastic material pushes the blood inside the device forward, pressurizes and propels the blood injected by the heart into the aorta during systole, and increases the blood supply to the distal end of the aorta and the coronary arteries.

The above-mentioned embodiments are only descriptions of preferred implementations of the present invention, and are not intended to limit the scope of the present invention. Variations and improvements should fall within the scope of protection defined by the claims of the present invention.

Claims (4)

1. an ascending aorta type ventricular assist device, it is characterised in that include inside and outside two-layer, outer layer two ends connect artificial blood Pipe, this device top is closed by artificial valve or connects artificial valve in art；And described inside and outside two interlayers are by pipeline and air pump Connect, by this air pump and the Pacing lead that is connected with air pump the part of this two interlayer can be carried out the inflation with cardiac synchronous or Air-breathing；Wherein, this outer layer is hard gel material, and internal layer is soft capsule material.

2. ascending aorta type ventricular assist device as claimed in claim 1, it is characterised in that during use, body is located at by described air pump Outward.

3. ascending aorta type ventricular assist device as claimed in claim 1, it is characterised in that this device is closed by artificial valve Or the one end connecting artificial valve in art is configured to the distal end with ascending aorta and coincide.

4. the ascending aorta type ventricular assist device as described in claim 1 or 3, it is characterised in that this device is not provided with valve One end is configured to the proximal part with ascending aorta and coincide.