The effect of a heat and moisture exchange filter on sidestream spirometry in critically ill patients

Sidestream spirometry has enabled continuous on-line monitoring of the pulmonary mechanics in intubated patients. We studied the effect of the heat and moisture exchange filter (HMEF) on the displayed spirometry values of a commercial multiparameter pulmonary monitor in 35 stable ICU patients needin...

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Bibliographic Details
Published in:International journal of clinical monitoring and computing 1994-11, Vol.11 (4), p.217-222, Article 217
Main Authors: PUOLAKKA, J. J, JOUSELA, I. T
Format: Article
Language:English
Subjects:
Adolescent
Adult
Aged
Aged, 80 and over
Anesthesia. Intensive care medicine. Transfusions. Cell therapy and gene therapy
Biological and medical sciences
Carbon Dioxide - metabolism
Critical Care
Critical Illness
Emergency and intensive care: techniques, logistics
Female
Filtration - instrumentation
Hot Temperature
Humans
Humidity
Intensive care medicine
Intensive care unit. Emergency transport systems. Emergency, hospital ward
Intubation, Intratracheal
Lung Compliance
Male
Medical sciences
Middle Aged
Monitoring, Physiologic - instrumentation
Online Systems
Pulmonary Ventilation
Respiration, Artificial
Respiratory Mechanics - physiology
Spirometry - instrumentation
Tidal Volume
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Summary:Sidestream spirometry has enabled continuous on-line monitoring of the pulmonary mechanics in intubated patients. We studied the effect of the heat and moisture exchange filter (HMEF) on the displayed spirometry values of a commercial multiparameter pulmonary monitor in 35 stable ICU patients needing mechanical ventilatory support. There were statistically significant differences in tidal volumes, airway pressures, compliances and end-tidal CO2-values between the two sites of measurements on both sides on the HMEF. The effect of the HMEF was linear in almost every patient. However, the change of the displayed values was clinically of minor importance. In conclusion, we suggest that the HMEF can be safely used between the patient and the monitoring site in routine ventilatory monitoring of ICU patients.
ISSN:0167-9945
DOI:10.1007/BF01139873