1985 Fiscal Year Final Research Report Summary

The ventilatory effect of the percutaneous electrical stimulation of phrenic nerve

Research Project

Project/Area Number	58870051
Research Category	Grant-in-Aid for Developmental Scientific Research
Allocation Type	Single-year Grants
Research Field	Respiratory organ internal medicine
Research Institution	Tokyo Women's Medical University
Principal Investigator	KONNO Kimio 東京女子医科大学, 医, 教授 (40006771)
Project Period (FY)	1983 – 1985
Keywords	phrenic nerve / Percutaneous electrical stimulation / Percutaneous magnetic stimulation / 小型軽量気流計
Research Abstract	The purpose of this study is to clarify the ventilatory effect of percutaneous electrical as well as magnetic stimulation of phrenic nerve and to investigate the possibility of clinical application as an artificial ventilator. The ventilatory effects were evaluated mainly by tidal volume and transdiaphragmatic pressure. The optimum values for electrically stimulating frequency and pulse width to produce the maximum tidal volume were 50-150Hz and 0.5-1m sec. respectively. The same ventilatory effects could also be painlessly generated by the percutaneous magnetic stimulation as well. The very small sized flowmeter could be fabricated and have the similar characteristics to conventional ones. The further research on the biological influences to the other nerves except phrenic nerve at neck in the case of longterm percutaneous magnetic stimulation should be necessary to study.