The Effect of Different Levels of PEEP on the Occurrence of Atelectasis After CABG A Retrospective Study From Palestine

Abstract

Respiratory complications are among the most common issues post coronary artery bypass grafting (CABG), with atelectasis being one of the most serious respiratory consequences. This study aims to evaluate the association between positive end-expiratory pressure (PEEP) levels and post-CABG atelectasis, investigate demographic risk factors associated with atelectasis, and determine the timing pattern of atelectasis development. A retrospective analysis was conducted on data from 268 CABG patients. Three PEEP levels—5, 8, and 10 cm H2O were considered. Demographic information and postoperative outcomes were collected using a selfdeveloped data collection tool. The study took place at a tertiary care hospital in Nablus, West Bank. Higher PEEP levels, especially at 10 cm H2O, were associated with a reduction in pulmonary atelectasis. Smoking emerged as a significant factor influencing atelectasis, while interventions such as spirometry and early thoracic drainage showed positive effects in reducing the incidence of atelectasis. Furthermore, higher PEEP levels were associated with a shorter hospital stay after CABG. This study has highlighted the importance of optimal PEEP adjustment in improving respiratory outcomes and reducing recovery time post-CABG Key words: atelectasis, coronary artery bypass grafting, positive end-expiratory pressure