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Acute tetrachloroethylene poisoning--blood elimination kinetics during hyperventilation therapy
Journal of Toxicology. Clinical Toxicology
|January 1, 1985
Summary
Hyperventilation therapy significantly improved a child's coma after tetrachloroethylene (PCE) ingestion. This treatment accelerated PCE elimination from blood, with faster half-lives observed during therapy.
Area of Science:
- Toxicology
- Pharmacokinetics
- Clinical Medicine
Background:
- Tetrachloroethylene (PCE) is a common industrial solvent with significant toxicity.
- Acute PCE poisoning can lead to severe neurological impairment, including coma.
- Effective management strategies for PCE toxicity are crucial.
Observation:
- A 6-year-old boy presented in a coma following ingestion of 12-16 g of tetrachloroethylene.
- Hyperventilation therapy was initiated due to the high initial PCE blood levels.
- The patient showed considerable clinical improvement under hyperventilation therapy.
Findings:
- Computer modeling revealed a two-compartment model for PCE elimination.
- Hyperventilation therapy significantly reduced PCE elimination half-lives (30 min and 36 hours) compared to normal conditions (160 min and 33 hours).
- The fast elimination process's contribution increased from 70% to 99.9% during hyperventilation.
- Urinary excretion of unchanged PCE, trichloroacetic acid, and trichloroethanol was observed, with trace amounts of unchanged PCE being a novel finding.
Implications:
- Hyperventilation therapy is an effective intervention for acute tetrachloroethylene poisoning.
- Accelerated elimination kinetics under hyperventilation suggest improved detoxification.
- Further research into PCE metabolism and excretion pathways is warranted.