Date of Award

Spring 1994

Degree Type

Thesis - Restricted

Degree Name

Master of Science (MS)




The purpose of this study was to determine the cardiopulmonary effects of repositioning coronary artery bypass graft (CABG) surgery patients in the immediate post-operative period. Cardiopulmonary effects examined included: heart rate (HR), mean arterial blood pressure (MAP), mean pulmonary artery pressure (PAM), arterial oxygenation measure by finger pulse oxymetry (SpO2), and mixed venous oxygen saturation (SvO2). The study was done from 20 minutes to 3 hours after surgery with an average of 60 minutes. Thirty two patients who had undergone CABG surger.y were included in the sample that was randomly assigned to 1 of 2 groups. Patients were turned through a series of turns which included: left or right lateral (45 degrees) initially, followed by supine, followed by left or right lateral (45 degrees), ending with supine. Each position was maintained for 60 minutes. All cardiorespiratory data was collected prior to each turn and for every minute for five minutes post turn. Statistically significant changes were noted in Sv02, MAP, and Sp02. No significant changes were noted for heart rate or PAM. In conclusion, this study demonstrated that CABG surgery patients were able to tolerate repositioning with no clinical significance seen in cardiorespiratory effects as measured by Sv02, HR, MAP, PAM, and Sp02.