The Effects of Body Mass İndex On İntraabdominal Pressure And Regional Cerebral Oxygen Saturation İn Prone Position

Study Overview
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Brief Summary
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A total of 40 ASA (American Society of Anesthesiology) physical status I-III who underwent lumbar disc hernia repair for one or two levels were included in this prospective study. A standard anesthesia protocol was performed in all patients. Routine intraoperative monitoring consisted of electrocardiography, automatic noninvasive arterial blood pressure, pulse oximetry, capnography, and cerebral tissue oxygen saturation through NIRS.Patients' demographics such as age, gender, height, weight, BMI, smoking status and pre-existing medical conditions were recorded.The patients were allocated equally to two groups according to BMI as Group I: BMI ≥30kg/m2,Group II <30 kg/m2.

Detailed Description
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Routine intraoperative monitoring consisted of electrocardiography, automatic noninvasive arterial blood pressure, pulse oximetry, capnography, and cerebral tissue oxygen saturation through NIRS.Frontal lobe oxygenation was monitored continuously and recorded every 5 minutes.Before positioning patients on the operating table, a Foley catheter was placed. IAP was measured in the following positions in all patients: 1) in the supine position after intubation 2) in the prone position before the skin incision.All patients were placed into the prone position on the silicone pads after general anesthesia.Before statistical analysis, the 40 patients were allocated equally to two groups according to the World Health Organization Guideline of BMI: Group I: BMI ≥30kg/m2, Group II <30 kg/m2

Official Title
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The Effects of Body Mass İndex On İntraabdominal Pressure And Regional Cerebral Oxygen Saturation İn Lumbar Spine Surgery İn Prone Position

Conditions
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Cerebral Hypoxia During and/or Resulting From A Procedure

Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Age 18-70 years ASA physical status I - III patients undergoing lumbar disc hernia repair for two or less levels Exclusion Criteria: Age smaller than 18 or older than 70 years, ASA physical status more than III, Patients with a history of carotid artery stenosis, prior neck surgery, cervical canal stenosis, stroke, neurological deficit, myocardial infarction, spinal cord injury and sudden vision loss

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 70 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Cerebral tissue oxygen saturation with NIRS .Effect os boddy mass index on cerebral tissue oxygen saturation in prone position | Effects of boddy mass index and intraabdominal pressure on cerebral tissue oxygen saturation in prone position | İntraoperatif ( During surgery) | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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cerebral oxygenation, prone position, obesity