Armas PG, Pías SS, Rabí AH, Fernández MCA

Language: Spanish
References: 0
Page: 19-27
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ABSTRACT

Background: Our scenario presents high frequency of patients with chronic obstructive pulmonary disease and bronchial asthma and who require elective surgery and general anesthesia with volume- and pressure-controlled mechanical ventilation.
Objective: To compare both methods of controlled ventilation in patients with chronic respiratory diseases electively operated at Manuel Ascunce Domenech University Hospital in Camagüey.
Methods: Analytical, observational study. The universe comprised 83 patients and the sample comprised 40 patients. Study group I, in which volume-controlled ventilation was used, and volume was adjusted to 7 mL/kg, with respiratory rate of 10-12 breaths per minute, inspiratory-expiration ratio 1:2, and FiO2 at 20.5 %; and group II, in which pressure-controlled ventilation was used and the ideal peak inspiratory pressure was set to ensure the patient's adequate volume per minute, respiratory rate of 10-12 breaths per minute, inspiratory-expiration index 1:2, and FiO2 at 0.5 %. Dynamic compliance was calculated in both groups and the relationship between oxygen arterial pressure and inspired oxygen fraction was determined.
Results: We found higher numbers of the PO2/FiO2 ratio, lower PIP numbers and better dynamic compliance in group II.
Conclusions: Pressure-controlled ventilation is a ventilation modality that offers the patient adequate oxygenation with better compliance and control of peak inspiratory pressure.