Summary
Six patients in respiratory failure who were receiving intermittent positive pressure ventilation were studied to determine the efficacy of chest physiotherapy and the nature of the accompanying cardiovascular changes. Arterial to alveolar tension gradients for both oxygen and carbon dioxide were measured before and after chest physiotherapy, as was cardiac output. In addition, serial cardiac output measurements were made during physiotherapy. No overall change in pulmonary gas exchange was demonstrated. Cardiovascular response varied in different patients; a rise or a fall by as much as 50 per cent of the initial cardiac output was observed. The results are discussed and it is suggested that further study is needed to define which of those procedures used during chest physiotherapy are effective and safe.
Résumé
Nous avons étudié six malades en défaillance respiratoire qui recevaient une ventilation à pression positive intermittente pour déterminer ľefficacité de la physiothérapie thoracique et la nature des changements cardiovasculaires qui ľaccompagnent.
Avant et après la physiothérapie thoracique, nous avons mesuré les différences de tension alvéolaire et artérielle et de ľoxygène et du gaz carbonique de même que le débit cardiaque. De plus, nous avons fait une série de mesures du débit cardiaque au cours de la physiothérapie. La réponse cardiovasculaire a varié selon les malades; nous avons observé des variantes du débit cardiaque de 50 pour cent en plus ou en moins. Nous avons discuté ces résultats; nous suggérons de faire de plus amples études pour préciser quelles sont les monœuvres employées au cours de la physiothérapie thoracique qui sont à la fois efficaces et de toutes sécurité.
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References
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Presented at the Annual Meeting, Canadian Anaesthetists’ Society, Toronto, June 16, 1969.
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Laws, A.K., McIntyre, R.W. Chest physiotherapy a physiological assessment during intermittent positive pressure ventilation in respiratory failure. Can. Anaes. Soc. J. 16, 487–493 (1969). https://doi.org/10.1007/BF03004542
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DOI: https://doi.org/10.1007/BF03004542