Can Selection of Mechanical Ventilation Mode Prevent Increased Intra-Abdominal Pressure in Patients Admitted to the Intensive Care Unit?

Background: increased intra-abdominal pressure (iap) results indysfunction of vital organs. the aim of the present study was toevaluate the effect of mechanical ventilation mode on iap.methods: in a cohort study, a total of 60 patients aged 20-70 yearswho were admitted to the icu and underwent mechanical ventilationwere recruited. mechanical ventilation included one of the threemodes: biphasic positive airway pressure (bipap) group, synchronizeintermittent mandatory ventilation (simv) group, or continuouspositive airway pressure (cpap) group. for each patient, mechanicalventilation mode and its parameters, blood pressure, spo2, and statusof tube feeding and iap were recorded.results: our fi ndings indicate that the study groups were not signifi cantlydifferent in terms of anthropometric characteristics includingage (64.5 ± 4, p = 0.1), gender (male/female 31/29, p = 0.63), and bodymass index (24 ± 1.2, p = 0.11). increase iap was related to the typeof respiratory mode with the more increased iap observed in simvmode, followed by bipap and cpap modes (p = 0.01). there weresignifi cant correlations between increased iap and respiratory variablesincluding respiratory rate, pressure support ventilation, and inspiratorypressure (p < 0.05). tube feeding tolerance through ng-tube was lowerin simv group, followed by bipap and cpap groups (p < 0.05).conclusions: there is a signifi cant relationship between respiratorymodes and iap; therefore, it is better to utilize those types of mechanicalventilation like cpap and bipap mode in patients who are prone tointra-abdominal hypertension.