The effects of exchange transfusion on the pharmacokinetics of phenobarbital

R. Sagraves, J. C. Bradberry

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

A 26-month-old child was admitted to the pediatric intensive care unit for treatment of apparent fulminant hepatitis. While hospitalized, he underwent eight exchange transfusions to decrease ammonia concentrations. The patient received intravenous phenobarbital (Pb) for the treatment of cerebral edema. To determine the effects of exchange transfusion on Pb clearance, serum Pb concentrations were obtained before, after and between exchanges. Preexchange and postexchange serum Pb concentrations were obtained on three separate exchanges. Pb concentrations also were examined between two exchange transfusions. The amount of Pb actually removed during one exchange transfusion was determined analyzing serum obtained from the discarded blood resulting from the procedure. All Pb concentrations were analyzed by the Emit system. Results indicate that Pb was cleared at a mean rate of 433 ml/h during the exchange periods examined, with a mean overall elimination constant of 0.20 h-1. The Pb actually removed by the exchange transfusion on day 10 of hospitalization was determined to be 17 mg, while the calculated amount was 8 mg. A mean of 22.3 mg of Pb was calculated to be removed over an average exchange time of 2.2 hours. Pb clearance during exchange transfusion has not been reported previously. This case has shown that small amounts of Pb can be removed by exchange transfusion; therefore, patients undergoing this procedure may require serum monitoring after exchange.

Original languageEnglish
Pages (from-to)901-903
Number of pages3
JournalDrug Intelligence and Clinical Pharmacy
Volume17
Issue number12
StatePublished - 1983
Externally publishedYes

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Phenobarbital
Pharmacokinetics
Serum
Pediatric Intensive Care Units
Brain Edema
Ammonia
Hepatitis
Hospitalization

All Science Journal Classification (ASJC) codes

  • Pharmacology (medical)
  • Pharmacology, Toxicology and Pharmaceutics(all)

Cite this

The effects of exchange transfusion on the pharmacokinetics of phenobarbital. / Sagraves, R.; Bradberry, J. C.

In: Drug Intelligence and Clinical Pharmacy, Vol. 17, No. 12, 1983, p. 901-903.

Research output: Contribution to journalArticle

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