A clamping and self-locking cotton precision dibbler was designed and tested in this study.Its operating principle and working process were discussed and analyzed.
Conclusion The hypothermia,extracorporeal circulation,clamp of aorta and drugs,etc.can lead to decrease of HRV in cardiac surgery.The resume of autonomic cardioneural system was a slow process.
It is composed of the XD-I vibroscope based on the string vibration and the XQ-I fibre tensile tester with pneumatic clamp operating and data processing function.