Development of a new haemostatic dissecting forceps utilizing controlled heat as an energy source.

We tested a prototype of a new thermal surgical system in animal experiments. This device utilizes controlled heat as an energy source and seals and divides small- to medium-size vessels. The forceps we used in the current study are shaped like dissecting forceps used in conventional open surgery, and their grippers can open bilaterally. Heating elements are built into a gripper. The temperature adjustment is controlled by monitoring the electric resistance. Since the new device utilizes no ultrasonic energy, unfavorable phenomena such as cavitations or mist production are not observed. In a preliminary experiment, 12 segments of animal arteries were sealed and cut by the prototype forceps. Five artery stumps did not burst at the maximum pressure of the manometer system (1471 mmHg). The other seven stumps showed burst pressure ranging from 525 mmHg to 1051 mmHg. It is feasible to utilize controlled heat as a new alternative energy source for haemostatic surgical dissection. The new thermal dissector we are in the process of developing showed safe and quick sealing and cutting of the vessels in the experimental settings.