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Transcutaneous Oxygen and Carbon Dioxide Monitoring in Normal Cats
Author(s) -
Mann F. A.,
WagnerMann Colette C.,
Branson Keith R.
Publication year - 1997
Publication title -
journal of veterinary emergency and critical care
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.886
H-Index - 47
eISSN - 1476-4431
pISSN - 1479-3261
DOI - 10.1111/j.1476-4431.1997.tb00049.x
Subject(s) - normocapnia , hypercapnia , hypocapnia , hyperoxia , medicine , anesthesia , carbon dioxide , cats , room air distribution , isoflurane , lung , chemistry , acidosis , physics , organic chemistry , thermodynamics
Summary Feasibility of noninvasive oxygenation and ventilation monitoring using continuous transcutaneous oxygen (PO 2 ‐ TC ) and carbon dioxide (PCO 2 ‐ TC ) measurements was investigated in six healthy adult male cats anesthetized with isoflurane. Concurrent arterial blood gases, inspired oxygen concentration (FIO 2 ), end‐tidal carbon dioxide (ETCO 2 ), PO 2 ‐ TC were recorded during hyperoxia/normocapnia, normoxia/normocapnia, hypoxia/normocapnia, hypocapnia/hyperoxia, and hypercapnia/hyperoxia. Dorsolateral thorax and dorsal pelvis probe sites were evaluated. Probe site did not significantly affect the parameters. During normoxia and hypoxia, mean PO 2 ‐ TC was insignificantly greater than mean PaO 2 (p > 0.154), but during hyperoxia PO 2 ‐ TC was less than Pao 2 (p < 0.002). At each assessment (except hypercapnia for the dorsal pelvis probe site) PCO 2 ‐ TC was greater than PaCO 2 . Correlations between PO 2 ‐ TC and FIO 2 (p < 0.05), and PaO 2 (p <0.001), and between PCO 2 ‐ TC and ETCO 2 (p < 0.001), and PaCO 2 (p < 0.05) were good; however, the measured values of PO 2 ‐ TC and PCO 2 ‐ TC were not directly comparable to the measured values of PaO 2 and PaCO 2 , respectively. Clinical utility of transcutaneous monitoring in cats will require development of the appropriate conversion equation for carbon dioxide and modifications for practical application.