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Abstract
We have constructed a small inexpensive bedside computer that measures: (1) pulmonary
power, (2) pulmonary minute work, (3) respiratory airflow, (4) minute volume, (5)
intrapleural pressure or respirator pressure when a respirator is used, (6) peak inspiratory
flow, (7) peak expiratory flow, (8) mean tidal volume, (9) resistance, (10) compliance,
and (11) work: ventilation ratio.
More work is required to ventilate a patient after all operations, and the work expenditure
is proportionately greater than the increase in ventilation. This decreased efficiency
is paralleled by a decrease in compliance, the latter representing distensibility
of the lungs. This is further illustrated by the observation that tidal volume did
not change significantly throughout the postoperative period.
Respiratory resistance showed no immediate change; however, this parameter may be
a good indicator of late airway obstruction.
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Article info
Publication history
Accepted:
February 9,
1970
Footnotes
☆Supported by United States Public Health Service Grants Nos. HE 09858 and HE 06163.
Identification
Copyright
© 1971 Published by Elsevier Inc.
