Aortic Cross Clamping Time, and Postoperative Respiratory Function

Implication of Aortic Cross Clamping Time Upon Postoperative Respiratory Function in Adult Patients Undergoing Open Heart Surgery

Does the duration of cardiopulmonary bypass, and aortic cross clamping affects the post operative pulmonary function.

Cardiac surgery usually is done under cardiopulmonary bypass. As the blood contacts with the artificial tubing of the circuit, there is release of mediators which affects pulmonary function. Of no doubt that the duration of cardiopulmonary bypass, and cross clamping time, will affect the spell over of such mediators. Follow up of the pulmonary function, and arterial blood gas is mandatory in such group of patients.

Inclusion Criteria:

• adult patients
• elective open heart surgery

Exclusion Criteria:

• Patients with myocardial ischemia or previous infarction
• low ejection fraction <30%
• history of AF
• implanted pacemaker
• uncontrolled hypertension
• renal impairment (creatinine >1.8 mg/dl)
• hepatic dysfunction
• insulin dependent diabetes
• chronic pulmonary disease