31 results about "Heart bypass" patented technology

Pump and cannula systems inserted through the right side and / or left side of the heart provide protection against collapse of the heart chambers and veins and arteries and provide supplemental blood flow through same to enable beating heart or still heart surgery, such as bypass surgery, on all vessels of the heart, including lateral and posterior vessels. Pump and cannula systems are provided for supporting pulmonary and / or circulatory blood flow external of the heart during any beating heart or still heart surgical procedure, including value repair or replacement. The invention eliminates the use of cardiopulmonary bypass (CPB) machines in all heart surgery and utilizes the patient's lung(s) for providing oxygenated blood during heart surgery. The invention further provides stents adapted for protecting from vein, artery, atrium and / or ventricle collapse during beating heart bypass surgery.

The invention relates to a blood cannula for discharging blood into a vessel, in particular aortic cannula for discharging blood into an aortic arch during heart-bypass surgery, comprising a tubular body (1), the tubular body having a straight part at the proximal end (2) and a bent part at the distal end (3) leading into an outlet opening (5), wherein the distal end (3), in particular the bent part has an increasing cross section in the direction of blood flow (B).

The present invention relates to a heart bypass mode selection system, the system includes: a contrast capture mechanism, connected with a contrast actuator, for receiving a cardiac contrast image obtained by the contrast actuator through X-ray scanning; a signal conversion device, and The length identification mechanism is connected, and is used to calculate the mean value of the lengths of the blood vessels corresponding to the respective imaging regions corresponding to the blood vessels, so as to obtain the average blocked blood vessel length, and when the average blocked blood vessel length is greater than a preset length threshold, send an arterial bridge selection Signal. The heart bypass mode selection system of the present invention is effective in analysis and saves time. Since the condition of each patient who needs to perform heart bypass can be analyzed using the machine-based identification mode, the bypass mode of vein graft or arterial graft can be automatically selected based on the average length of the blocked blood vessel, thereby saving the time required for medical decision-making.

A method for establishing a model for predicting the permeability of a bridged blood vessel in a heart bypass operation based on a hemodynamic model belongs to the field of model establishment. The instantaneous blood flow waveform of the bridge vessel measured during the operation was digitally processed, and it was assigned as the boundary condition to the three-dimensional model of the bypass operation. The hemodynamic parameters of the bridge vessel and the anastomosis were obtained by the finite element method, and then these parameters were calculated. The parameters are used as features to build a support vector machine-based prediction model. This method can be used to help doctors and patients understand the effect of surgery, determine the strategy of further surgery or the plan of postoperative review.

The invention discloses a sensor capable of measuring the flow rate of the collateral blood vessels of the cardiac artery, which comprises a controlled and coordinated heating part and a sensing part. When in use, the heating part covers the surface of the cardiac aortic blood vessel. Distributed on the surface of the collateral blood vessels, the heating part heats the blood passing through the cardiac aortic vessels, and the temperature change generated when the heated blood flows through the cardiac artery collateral vessels is detected by the sensing unit array of the sensing part Information, based on the temperature change information to realize the measurement of the blood flow of the collateral blood vessels of the cardiac artery. The sensor of the present invention can be implanted into the human body, and can continuously detect the state of the collateral vessels of the cardiac artery for a long time. By simultaneously measuring variables such as temperature, pressure, and blood flow, it can effectively solve the problem of monitoring the blood circulation state of the arterial vessel after heart bypass surgery, and provide health benefits for patients. Provide a valid basis.

The invention relates to the technical field of medical air cushions, in particular to a mobile air cushion, which includes an air cushion bag, a protective belt and an inflatable device; since it is necessary to move a patient's bed in a hospital for different treatments, improper handling during the moving process Actions will cause pain to the patient, especially for patients undergoing heart bypass surgery, it is more necessary to ensure the stability of their body posture; therefore, the present invention cooperates with the air valve on the port during the moving process of the air cushion package through the grille holes arranged on the air cushion package. During the opening of the air cushion bag, an air cushion layer is formed at the bottom of the air cushion bag to facilitate its movement, and during the change of the patient's posture, the force of squeezing a certain position of the air cushion bag will discharge the gas through the grid holes, which will not cause the air cushion bag The bulges on other positions on the upper part avoid the damage caused by the secondary reaction of the air cushion bag on the patient's posture change, and ensure that the patient after heart bypass surgery is in a stable posture during the postoperative bed transfer process, thus improving the application effect of the mobile air cushion.