Evaluation of Renal Function in Non-Hypertensive Patients with Obstructive Sleep Apnea

Objective: Obstructive sleep apnea syndrome (OSAS) is one of the most common sleep disorders in society. The presence of hypertension is shown in 30-60% of OSAS patients. Creatinine clearance (CC) in hypertensive OSAS patients was found to be lower than non-hypertensive OSAS patients. In our study, we aimed to determine CC in non- hypertensive OSAS patients comparing with the control group and determine that CC is affected by the severity of OSAS. Material and Methods: Ninety-three patients with complaints of snoring who were diagnosed as obstructive sleep apnea syndrome with polysomnography were examined in the study between March 2009-November 2010. Renal function tests were performed in these patients and creatinine clearance was calculated. Results: According to the OSAS severity, 30 patients were in the mild, 32 in moderate and 31 in severe OSAS group.There were no statistically significant differences in the demograpic data, systolic and diastolic blood pressure and CC between OSAS and control groups There was no corelation between severity of disease and CC. Conclusion: Due to the pathophysiologic features of OSAS, chronic kidney disease can develop in these patients, although hypertension has not yet developed. Therefore it must be considered that, hypertension may develop in patients with OSAS; blood pressure monitoring, evaluation and monitoring of renal function should not be neglected.