Clinical Usefulness of End-tidal Partial Pressure of Carbon Dioxide Monitoring in Horses Anesthetized with Isoflurane.

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  • 馬のイソフルラン麻酔における終末呼気炭酸ガス分圧の臨床的有用性
  • ウマ ノ イソフルラン マスイ ニ オケル シュウマツ コキ タンサン ガス

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The correlation between end-tidal partial pressure of carbon dioxide (PetCO2) and arterial partial pressure of carbon dioxide (PaCO2) was determined in 53 isoflurane-anesthetized horses undergoing surgeries in lateral or dorsal recumbency. The horses were maintained under spontaneous breathing or intermittent positive pressure ventilation (IPPV) . There was a significant (p< 0.05) correlation between PetCO2 and PaCO2in lateral and dorsal recumbency. The correlation coefficients under spontaneous breathing and IPPV were 0.781 and 0.906, respectively, in lateral recumbency, and 0.479 and 0.719, respectively, in dorsal recumbency. It is concluded that end-tidal carbon dioxide monitoring serves as a satisfactory parameter of changes in PaCO2in horses receiving inhalation anesthesia in either lateral or dorsal recumbency, although correlation coefficients decrease under spontaneous breathing in dorsal recumbency.

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