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  THE Effect of chair position on respiratory parameters in patients undergoing mechanical ventilation     Fallahinia GhH [1] ,Baghcheghi N [2] ,Oshvandi Kh [3] *,Taher A [4] , Soltanian AR [5]     Received: 7 Feb, 2013 Accepted: 15 May, 2013    Abstract  Background & Aims : There are many barriers to the movement of patients requiring mechanical ventilation and these patients are at risk for complications of immobility, especially pulmonary complications so along with the use of mechanical ventilation in patients, we should take steps to create movements in them. The aim of this study was to determine the effect of chair position on respiratory parameters of patients undergoing mechanical ventilation.   Materials & Methods : In this randomized clinical trial groups, 60 mechanically ventilated patients admitted to ICU in Besat Hospital of Hamadan with convenience sampling were studied . 30 patients were in chair position for half an hour (put the head of the bed at an angle of 70 degrees and foot of the bed at an angle of -75 degrees), and the other 30 patients (c ontrol group) were in i nitial position for half an hour (put the head of the bed at an angle of 30 degrees and knees straight). Respiratory parameters (respiratory rate, tidal volume, minute ventilation and arterial oxygen saturation) before and immediately after half-time were measured and recorded in two groups. The d ata were analyzed with SPSS16 to carry out paired t-test and t-test with significant level of P

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