[Reaction of the blood circulation and its oxygen transport function to the discontinuation of prolonged mechanical lung ventilation in heart surgery patients with an uncomplicated postoperative period]. / Reaktsiia krovoobrashcheniia i ego kislorodtransportnoi funktsii na prekrashchenie prodlennoi IVL u kardiokhirurgicheskikh bol'nykh s neoslozhnennym techeniem posleoperatsionnogo perioda.

ABSTRACT

The studies of changes in central hemodynamics and oxygen balance during discontinuation of controlled lung ventilation in 24 cardiosurgical patients with uncomplicated postoperative period have demonstrated 2 types of circulatory response to transition to adequate spontaneous respiration. It has been shown that an increase in O2 consumption due to the involvement of respiratory muscles is the main factor affecting the resetting of central hemodynamics and oxygen balance during transition to spontaneous respiration. While in patients with normodynamic type of circulation O2 increment is as a rule caused by an increase in cardiac performance, in cardiosurgical patients with hyperdynamic type of circulation O2 increment is mainly ensured by enhanced tissue O2 extraction.