Author/Editor		Butinar, J; Podgornik, D; Seliškar, A
Title		Kapnometrija kot metoda vrednotenja hipotenzije zaradi hipovolemije med splošno anestezijo s spontanim dihanjem
Translated title		Capnometry as a method for evaluation of hypotension due to hypovolaemia during general anaesthesia with spontaneous breathing
Type		članek
Source		In: Hribar-Habinc M, Apfel M, editors. Zbornik predavanj 2. kongres anesteziologov Slovenije z mednarodno udeležbo; 1997 okt 23-25; Portorož. Ljubljana: Slovensko zdravniško društvo, Slovensko združenje za anesteziologijo in intenzivno medicino,
Publication year		1997
Volume		str. 234-8
Language		slo
Abstract		The aim of the study was to evaluate hypotension due to haemorrhage during anaesthesia with spontaneous ventilation. The hypotension was experimentally induced by gradually removing 33% of calculated blood volume during anaesthesia with spontaneous ventilation: ETCO2 values were compared to the systemic arterial blood pressure measurements, volumetry, arterial blood gas analyses, and adrenaline, noradrenaline and beta endorfine concentrations. Volumetry showed that minute volume did not changed statistically significant during experimentally induced hypotension under general anaesthesia with spontaneous breathing and could not influence significantly the drop in ETCO2 with concurrent arterial normocarbia. Taking into account results of previous investigations that ETCO2 values, cardiac output and arterio/venous gradient are related, authors correlate the significant drop in ETCO2 values during experimental hypotension with cardiac output. ETCO2 values were decreasing simultaneously with decreasing the circulating blood volume, while systemic arterial blood pressure values were decreasing significantly slower, which was proved with adrenaline and noradrenaline concentrations. Almost the same was evident during (auto)transfusions wheh ETCO2 response followed the replacement of previously removed bood volume more simultaneously than systemic arterial blood pressure did. Authors are concluding that ETCO2 changes indirectly reflect cardiac output changes more accuratelly than arterial blood pressure changes even during general anaesthesia with spontaneous breathing.
Descriptors		ANESTHESIA, GENERAL HYPOTENSION, CONTROLLED HEMORRHAGE CAPNOGRAPHY DOGS CARBON DIOXIDE