Relationship Between Parameters of VOT Using NIRS and Clinical Outcomes in Pediatric Cardiac Surgery

Relationship Between Parameters of Vascular Occlusion Test Using Near Infrared Spectroscopy and Clinical Parameters & Outcomes in Pediatric Cardiac Surgery

The purpose of this study is to evaluate the ability of vascular occlusion test (VOT) during cardiac surgery to predict postoperative outcomes in pediatric patients.

After induction of anesthesia, pediatric SomaSensor for INVOS 5100C is attached at calf muscle and non-invasive blood pressure cuff is applied to ipsilateral thigh. VOT is performed as: after baseline oxygen saturation value is recorded, cuff pressure is rapidly increased to 30 mmHg over than systolic blood pressure. After 3 minutes of ischemic time, cuff pressure is rapidly decreased. It is performed at 3 time periods : before start of operation, during cardiopulmonary bypass, and after weaning from cardiopulmonary bypass. Postoperative outcome variables are recorded after surgery : major adverse event, use of inotropic and vasoactive drugs, duration of mechanical ventilation and ICU stay. The relationship between the results of VOT and postoperative outcome will be investigated.

Inclusion Criteria:

• Pediatric patients aged under 8 years old who are scheduled for cardiac surgery

Exclusion Criteria:

• Skin disease
• Skin preparation involving thigh
• Peripheral vascular disease