Vascular anastomosis patency assessment method, photoelectric tweezers and system

Abstract

The invention discloses a vascular anastomosis patency assessment method, photoelectric tweezers and a system, and the method comprises the steps: selecting a far-end position of a detected anastomosis blood vessel, and collecting a PPG signal of an artery at the far-end position of the detected anastomosis blood vessel; performing signal processing on the PPG signal to obtain an oxyhemoglobin saturation SPO2 value; monitoring the oxyhemoglobin saturation SPO2 value of the tested anastomotic blood vessel, and evaluating the smoothness of the tested anastomotic blood vessel according to the oxyhemoglobin saturation SPO2 value. By monitoring the far-end position of a measured anastomosed blood vessel, the PPG signal of the far-end artery of the anastomosed blood vessel can be rapidly obtained and converted into the blood oxygen saturation degree, the blood oxygen saturation degree of the anastomosed blood vessel is monitored in real time, and then the smoothness of the anastomosed blood vessel is rapidly and effectively evaluated in an operation, so that abnormal anastomosis of a rebuilt blood vessel is found in the early stage, and the accuracy of the rebuilt blood vessel is improved. Tissue ischemia or excessive perfusion injury can be corrected and reversed in time, and the success rate of vascular anastomosis is increased.

Description

technical field [0001] The invention relates to the technical field of blood vessel evaluation, in particular to a method for evaluating the patency of blood vessel anastomosis, photoelectric tweezers and a system. Background technique [0002] Intracranial-extravascular bypass surgery, cardiac bypass surgery, and replantation of amputated fingers (limbs) require fine vascular anastomosis techniques. The main complication of this technique is tissue ischemia or excessive perfusion caused by embolism of reconstructed vessels. of tissue damage. Immediately evaluating the patency of the anastomotic vessel during the operation and preventing hypoperfusion or overperfusion are the key to determining the success of the operation. Therefore, it is necessary to have a tool that can quickly and effectively evaluate the patency of the anastomotic vessel during the operation so as to detect abnormalities of the reconstructed vascular anastomosis early. It is conducive to timely correc...

AI Technical Summary

Problems solved by technology

This method may cause secondary damage to the anastomotic vessels, and lacks objectivity

[0004] Intraoperative digital subtraction angiography (DSA) is the "gold standard" for assessing the patency of vascular anastomosis, but DSA can only reflect the morphological patency of anastomotic vessels, and cannot evaluate the changes in hemodynamic parameters of anastomotic vessels

In addition, the intraoperative DSA examination is expensive, requires professional doctors and equipment, prolongs the operation time, and has disadvantages such as ionizing radiation.

Images