بررسي تاثير وضعيت نشسته و مدت زمان آن بر روي نتايج گازهاي خون شرياني ...

Study of semi-fowlerʹs Position and Its Duration Effect on the Arterial Blood Gases Results in Patients under Mechanical Ventilation Hospitalized in General ICU

Position changing with blood distribution to different portions of lung can produce V/Q mismatch, and finally extend to oxygenation disruption. Thus, if position changing is doneʹ neglecting the patientsʹ pulmonary problem types, not only does it fail to cause oxygenation improvement, but it also induces gas exchange impairment, and with provocation of hypoxemia and respiratory acidosis, serious problems result. The goals of this research are to determine the semi-fowlerʹs position and its duration effect on the arterial blood gases(ABGs)results in patients under mechanical ventilation hospitalized in general ICU. In this study , 30 ICU patients(22 males and 8 females) under mechanical ventilation were chosen. Then using questionnaires , the patientsʹ demographic data were collected . A sample of arterial blood from these patients lying in supine position, was taken . Again the patients immediately were placed in semi-fowlerʹs position and after 15,30,45,and 60minutes lying in this position, samples of arterial blood were taken and sent to laboratory. The findings showed that semi-fowlerʹs position did not have any positive effects on oxygenation and gas exchange. Also, the findings indicated that the effect of lying duration (15,30,45,60 minutes) in semi-fowlerʹs position on oxygenation and gas exchange wasnʹt significant. It was concluded that without considering the lung pathology, semi fowlerʹs position should not be used , because not only is this position unable to induce oxygenation-improvement, but actually it may causes gas exchange impairment.