Minimally invasive coronary artery graft intravascular continuous stem cell injection system

Abstract

The present invention is a minimally invasive coronary artery graft intravascular continuous stem cell injection system, comprising a cannula, a guide needle, and an infusion tube, characterized in that the guide needle is inserted into the cannula through the cannula or inserted into the cannula through the rear end of the infusion tube The front end of the infusion tube is connected to the rear end of the sleeve, and is installed in the body during use; the rear end of the infusion tube is passed through the skin and placed outside the body; a hard sheath is set outside the inner part of the infusion tube; the rear part of the sleeve A trocar hole sealing structure for blocking the trocar needle hole is arranged on the outside; when the guide needle is inserted from the cannula, a guide needle hole sealing structure is also arranged on the outside of the cannula. The device is used to continuously stay in the graft vessel after coronary artery bypass grafting, and inject stem cells intermittently or continuously into the graft vessel. The device is less invasive and can inject stem cells or other therapeutic drugs into the graft vessel outside the body at any time. Can be safely left in the body when not in use.

Description

technical field [0001] The invention belongs to a medical device for injecting stem cells in the body, in particular to a medical device for injecting stem cells or drugs into graft vessels after coronary artery bypass surgery, and specifically relates to a minimally invasive continuous injection of stem cells in coronary artery graft vessels system. Background technique [0002] The operation is to take the patient's own blood vessels (such as the internal thoracic artery, the great saphenous vein of the lower extremities, etc.) or blood vessel substitutes, connect the distal end of the narrowed coronary artery with the aorta, and let the blood pass through the narrowed part and reach the ischemic part. site, improve myocardial blood supply, and then achieve the purpose of relieving angina symptoms, improving heart function, improving the quality of life of patients and prolonging life. The procedure, called coronary artery bypass grafting, creates a clear path between the...

AI Technical Summary

Problems solved by technology

The guide needle can guide the cannula into the graft vessel and place it in the graft vessel; the trocar sealing structure is used to seal the trocar hole on the graft vessel after the trocar is pulled out to prevent bleeding; the guide needle hole is closed The structure is used to close the guide needle hole after the guide needle is taken out to prevent bleeding; when the guide needle is inserted into the cannula through the back end of the infusion tube, the guide needle can be pulled out directly during use without considering the problem of blocking the guide needle hole; the infusion tube The cannula is connected and the rear end is set with the outside body, and stem cells or drugs can be infused from outside the body to the graft vessel continuously or intermittently through the infusion tube

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