Hypercapnia During Shoulder Arthroscopy

The Effect of Hypercapnia on Regional Cerebral Oxygen Saturation in the Sitting Position

The purpose of this study is to evaluate the effects of hypercapnia on hemodynamics and cerebral oxygenation during shoulder arthroscopy.

The patients are randomly allocated to receive normocapnia or hypercapnia . After the 70º sitting position, record the mean arterial pressure (MAP), heart rate, and regional oxygen saturation (rSO2).

Inclusion Criteria:

• patients undergoing elective shoulder arthroscopic surgery

Exclusion Criteria:

• a history of age > 65 years, morbidly obesity (BMI > 30 kg/m2), diffuse lung disease, uncontrolled systemic hypertension, intracranial disease, cardiovascular and cerebrovascular disease.