Correlation Between Partial Oxygen Pressure and Oxygen Reserve Index

Study Overview
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Brief Summary
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Oxygen reserve index (ORI) measured by multiple wave pulse co-oximeter is a new technological development in medical science. Our aim in this study is to identify the correlation between arterial oxygen pressure (PaO2) and ORI, and to identify the specificity and sensitivity of ORI as a tool to prevent hypoxia and hyperoxia in abdominal surgery patients.

Detailed Description
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Patients aged between 20-55 years old,American Society of Anesthesiologists physical status 1-2 who will have hemicolectomy will be included to the study. If hemodynamic instability or a sudden decrease in oxygen saturation by pulse oximetry (SpO2) occurs, arterial blood gas analysis will be taken from the patient and ORI, SpO2, PaO2, and arterial oxygen saturation (SaO2) will be recorded. The primer endpoint of the study is to identify the correlation between PaO2 and ORI, seconder end-point is to identify the specificity and sensitivity of ORI as a detector of PaO2. Pearson test for correlation, regression analysis for sensitivity and specificity will be performed. The study will include 240 patients according to power analysis

Official Title
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Evaluation of the Correlation Between Partial Oxygen Pressure and Oxygen Reserve Index, and Sensitivity and Specificity of Oxygen Reserve Index in Patients Undergoing Hemicolectomy

Conditions
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COLON CANCER

Intervention / Treatment
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* Procedure: Hemicolectomy


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patients aged between 20-55 years old American Society of Anesthesiologists physical status I-II Patients undergoing hemicolectomy Exclusion Criteria: Chronic obstructive and restrictive pulmonary disease Diabetes Mellitus Ischemic heart disease Peripheric artery disease. Operations longer than 200 minutes, requirement transfusion of more than 1 U erythrocyte suspension, and requirement of vasopressor or inotrope infusion will be excluded from the study

Ages Eligible for Study
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Minimum Age: 20 Years
Maximum Age: 55 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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Design Details

Primary Purpose: Screening
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Hemicolectomy<br>Oxygen reserve index and partial oxygen pressure will be noted for patients undergoing hemicolectomy | Procedure: Hemicolectomy<br> <br> |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Evaluation of the correlation between partial oxygen pressure in arterial blood sample and oxygen reserve index calculated by pulse co-oximetry, and sensitivity and specificity of oxygen reserve index in patients undergoing hemicolectomy |  | oxygen reserve index and peripheric oxygen saturation will be recorded before and after induction of anesthesia, and every 5 minutes and arterial partial oxygen pressure in every 30 minutes during hemicolectomy. | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Sensitivity and specificity of oxygen reserve index |  | During Hemicolectomy | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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oxygen reserve index, partial oxygen pressure, hemicolectomy