With the increasing development of science and technology and the continuous improvement of modern people's demand for medical technology, the scalpel is no longer a purely medical cutting role. In order to achieve accurate and fast cutting, and at the same time have the function of hemostasis, the ultrasonic blade came into being.
The full name of ultrasonic blade is ultrasonic cutting hemostatic knife. It uses the cavitation effect of ultrasonic and high-frequency mechanical vibration to change the structure and state of biological tissue. It is mainly used for the cutting of biological tissue and blood vessel closure in surgical operations. It is one of the main electrosurgical instruments to replace the mechanical scalpel for tissue cutting due to the characteristics of less damage to the surrounding tissue and quick recovery after surgery, and is known as the "bloodless scalpel".
The working principle of the ultrasonic blade is to conduct the current through the system host to the handle, and the piezoelectric ceramic sheet in the handle activates the work. Maximum vibration, the cutter head is in contact with the tissue protein, the protein hydrogen bond is broken and the protein structure is reorganized, the protein coagulates and closes the small lumen, the protein is vibrated to generate secondary energy, the deep coagulation closes the larger lumen, and the water in the tissue is vaporized, further Helps in tissue stratification for cutting, coagulation and hemostasis.
Compared with surgical knives, electric knives, laser knives and other instruments, ultrasonic knives have obvious application advantages. Ultrasonic knives not only have the function of hemostasis, but also work at low temperature, reducing the damage scope of surgical knives to the human body.
The ultrasonic blade system is suitable for laparoscopic, thoracoscopy, small incision assisted and traditional open surgery. Through high-frequency vibration, the tissue hydrogen bonds are broken and reorganized, and the protein denaturation is achieved to achieve the synchronization of cleavage and coagulation.
When the ultrasonic blade works, the high-frequency oscillating tool head contacts tissue fluid or blood, resulting in a strong cavitation effect. The thermal effect of the bursting of a large number of cavitation bubbles causes the nearby proteins to be broken and solidified and blocked at the fracture of the blood vessel to achieve emergency hemostasis; at the same time, surgery Whether it is vibration friction or cavitation effect during knife cutting, it will lead to a certain degree of temperature rise in the acting body, which can increase the activity of thrombin in the blood near the area, thereby accelerating the coagulation reaction process.