Abstract
60 ASA I-III patients scheduled for elective thoracic surgery with single lung ventilation were randomly divided into 2 groups as low-flow (LF) and minimal flow (MF). After applying 4 L/min of fresh gas flow for the first 10 minutes in both groups, 1 L/min (80% oxygen + 20% air) with 4-6% desflurane to LF group (n = 30) and 0.5 L/min (80% oxygen + 20% air) with 6-8% desflurane to MF group (n = 30) was applied. The patient was set with the Dräger Perseus anesthesia device to have a tidal volume of 4-6 ml/kg, respiratory frequency of 16-18/min, and an Inspiration: Expiration (I:E) ratio of 1:2 (EtCO<sub>2</sub> 35-45 mmHg).
Highlights
Minimal flow anesthesia, Cerebral oximetry, Blood gas Interest in low fresh gas flow anesthesia methods has gradually increased over the decades
The carbon dioxide holder was evaluated in terms of its dryness and color and was changed every day by repeating it at appropriate times. 10 ml/kg/hr 0.9% sodium chloride perfusion was initiated by establishing venous access from the dorsum of the hand with a 20 gauge cannula in the patients who were taken to the operating table
Arterial blood gas follow-ups throughout single-lung ventilation and blood gas samples were recorded at the end of one lung
Summary
Interest in low fresh gas flow anesthesia methods has gradually increased over the decades. The high standard of anesthesia machines, the presence of monitors that analyze the anesthetic gas composition continuously and in detail, and the increase in knowledge on the pharmacodynamics and pharmacokinetics of inhalation anesthetics have greatly facilitated the safe administration of low-flow anesthesia. The reasons for anxiety about low fresh gas flow techniques are that the anesthesiologist does not know the technique, the dose of anesthetic gases for these techniques, and the uncertainty about the suitability of anesthesia machines. Terminology for low-flow anesthesia techniques can be based on the respiration rate or fresh gas flow rate. When modern re-ventilation systems are used, but the fresh gas flow rate is reduced to less than 2 L/min, low flow anesthesia can be mentioned for most patients
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call