Alveolar gas composition during maximal and interrupted apnoeas in ambient air and pure oxygen

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• 作者：Nazzareno Fagoni^a ; ^b ; ^{nazzareno.fagoni@unibs.it} ; Anna Taboni^c ; Giovanni Vinetti^c ; Sara Bottarelli^a ; Christian Moia^d ; Auré ; lié ; n Bringard^d ; Guido Ferretti^a ; ^d
• 关键词：DBP ; diastolic blood pressure ; HR ; heart rate ; MBP ; mean blood pressure ; PACO2 ; alveolar pressure of carbon dioxide ; PAO2 ; alveolar pressure of oxygen ; Q˙ ; cardiac output ; SBP ; systolic blood pressure ; SpO2 ; peripheral oxygen saturation ; SV ; stroke volume ; TPR ; total peripheral resistance ; ΔPACO2 ; difference in the alveolar carbon dioxide pressure between the end and the beginning of apnoea ; φ1 ; phase I ; first dynamic phase of the cardiovascular response to apnoea ; φ2 ; phase II ; steady-state pha
• 刊名：Respiratory Physiology & Neurobiology
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：235
• 期：Complete
• 页码：45-51
• 全文大小：863 K
• 卷排序：235

文摘

The transition between the phase 2–3 of the cardiovascular response to apnoea may correspond to physiological breaking point. Alveolar gas composition was determined at the end of interrupted phase 2 apnoeas, in air and in oxygen. In interrupted apnoeas, on O2-CO2 diagram, PAO2 and PACO2 lied on the physiological breaking point curve. Differences in PCO2 during apnoea, rather than the absolute PCO2 values, determine the volitional breaking point of apnoea.