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Difficulties in measuring human blood acetaldehyde concentrations during ethanol intoxication
Advances in Experimental Medicine and Biology
|January 1, 1980
Summary
Accurate measurement of human blood acetaldehyde (AcH) requires immediate deproteinization to avoid artefactual changes. New methods reveal AcH levels during ethanol intoxication without significant arterial-venous differences.
Area of Science:
- Biochemistry
- Toxicology
- Pharmacology
Background:
- Accurate determination of human blood acetaldehyde (AcH) is challenging due to pre-analytical artefactual reactions.
- These artefactual reactions include AcH disappearance before deproteinization and AcH formation during the process.
- Previous reports on blood AcH levels may require re-evaluation due to these complications.
Purpose of the Study:
- To develop and validate methods for accurate AcH determination in human blood.
- To investigate AcH concentrations during ethanol intoxication.
- To compare in vivo arterial and venous AcH levels.
Main Methods:
- Immediate deproteinization of blood samples (within 5 seconds) after collection.
- Correction for AcH formation under specific experimental conditions.
- Measurement of AcH concentrations following ethanol administration (1 g/kg).
Main Results:
- Established a method to circumvent artefactual AcH changes during blood sample processing.
- Determined human blood AcH concentrations during ethanol intoxication.
- Observed no significant difference between arterial and venous AcH levels post-ethanol intake (20-40 micro M).
Conclusions:
- Immediate deproteinization is crucial for accurate AcH measurement in blood.
- The developed methodology provides reliable AcH data during ethanol intoxication.
- In vivo arterial and venous AcH concentrations are comparable during ethanol intoxication.