Four milliliters of venous blood (2 ml preoperative and 2 ml postoperative) were collected into an EDTA test tube from each study participant by Medical Laboratory Science professionals. Hemoglobin concentration was determined using UniCel DxH 800 (Beckman Coulter, USA) automated hematology analyzer by spectrophotometry method15 (link). Hemoglobin concentration was analyzed at the hospital hematology laboratory and recorded for each study participant using a laboratory result registration form.
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Hemoglobin Concentration Measurement Protocol
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Other organizations : Haramaya University, Debre Berhan University
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Variable analysis
independent variables
- Preoperative and postoperative time points
- Hemoglobin concentration
- EDTA test tube used for blood collection
- Venous blood samples collected by Medical Laboratory Science professionals
- Hemoglobin concentration analyzed using UniCel DxH 800 (Beckman Coulter, USA) automated hematology analyzer by spectrophotometry method
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