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A novel method for blood volume estimation using trivalent chromium in rabbit models.
Prathap Moothamadathil Baby1, Pramod Kumar2, Rajesh Kumar3
1Department of Physiology, Melaka Manipal Medical College, Manipal campus, Manipal University, Karnataka, India.
Summary
Accurate blood volume measurement is crucial for critically ill patients but current methods are complex. This study validates a new method using trivalent chromium [(51)Cr(III)] against the standard Evans blue dye (EBD) method, establishing a correction factor for improved clinical application.
Area of Science:
- Biomedical Engineering
- Clinical Chemistry
- Experimental Medicine
Background:
- Blood volume estimation is vital for managing critically ill patients.
- Current methods are labor-intensive, complex, and time-consuming, limiting routine clinical use.
Purpose of the Study:
- To compare blood volume estimations using trivalent chromium [(51)Cr(III)] and the standard Evans blue dye (EBD) method in rabbits.
- To establish a correction factor (CF) for the (51)Cr(III) method.
Main Methods:
- Blood volume was measured in 33 New Zealand white rabbits using both EBD and (51)Cr(III) methods.
- A correction factor (CF) was derived by comparing EBD and (51)Cr(III) results.
- The CF was validated in a subset of rabbits.
Main Results:
- The (51)Cr(III) method yielded higher blood volume estimates than EBD before applying the CF.
- A correction factor (CF) of 0.77 was established.
- After applying the CF, blood volume estimations using (51)Cr(III) showed comparable results to the EBD method (P = 0.11).
Conclusions:
- Blood volume estimation using (51)Cr(III) with the established CF is comparable to the standard EBD method.
- The (51)Cr(III) method holds potential for application in acute clinical settings with further research.
