Optimum stimulus frequency for contracting the inspiratory muscles with chest-surface electrodes to produce artificial respiration.
Electroventilation is the term used to describe the production of inspiration by applying a train of short-duration pulses to chest-surface electrodes. Studies were conducted in the dog to determine the optimum frequency to produce a smooth air flow in the trachea. It was found that a stimulus frequency of 25/sec or slightly higher meets this criterion. To illustrate that electroventilation can be carried out for a prolonged period using these parameters, electroventilation was applied continuously for 5 hours in a dog without a noticeable change in blood pressure.
Geddes
L A
LA
Hillenbrand Biomedical Engineering Center, Purdue University, West Lafayette, IN 47907.
Voorhees
W D
WD
Bourland
J D
JD
Riscili
C E
CE
D000818:Animals; D004285:Dogs; D004558:Electric Stimulation; D004566:Electrodes; D007320:Inspiratory Capacity / Q000502:physiology; D009119:Muscle Contraction / Q000502:physiology*; D012123:Pulmonary Ventilation / Q000502:physiology; D012121:Respiration, Artificial / Q000379:methods*; D012132:Respiratory Muscles / Q000502:physiology*; D013997:Time Factors; D014132:Trachea / Q000502:physiology