Immunologic Changes in Critically III Patients After Anesthesia and Surgery

Anesthesia and the HIV infected parturient: a retrospective study

We wished to determine whether immunosuppression and/or acceleration of human immunodeficiency virus (HIV)-associated disease is related to the mode of anesthesia in the HIV infected parturient. Ninety-six known HIV-infected asymptomatic parturients who delivered between January 1990 and January 1992 at Grady Memorial Hospital were reviewed for pre-delivery health status, mode of anesthesia and peripartum/post-partum complications. Statistics used chi2 analysis. There were 36 regional anesthetics (28 epidural, 8 spinal), 11 general anesthetics, 22 local anesthesia/intravenous sedation and 27 patients who did not receive anesthesia. There were no differences in the 24-48 h and 4-6 week complication rates. None of the women studied developed neurologic sequelae for 2 years after anesthesia. Thirty-one of the 96 women had CD4/CD8 T-cell lymphocyte data at second trimester and 24-48 h post partum which showed no worsening of maternal immune status in women receiving regional anesthesia, local anesthesia/intravenous sedation or no anesthesia. We believe that both regional and general anesthesia can be performed safely on the asymptomatic HIV-infected parturient. The choice of anesthesia should be based on the usual obstetric and clinical considerations.

Human immune toxicity

This review examines xenobiotic toxicity to the immune system, stressing in particular those aspects of most relevance to humans. Immunotoxicity is examined especially from three points of view: by what immunological component is affected, by classes of foreign agents that adversely affect the human immune system and by critical evaluation of human case reports and epidemics. Mechanisms by which xenobiotics interrupt cytokine networks are emphasized. The concept that microbial agents, both environmental as well as infectious, may act as immunotoxicants, either alone or in synergism with conventional agents is introduced. Instances of human immunotoxicology are critically evaluated in terms of clinical relevance, i.e. whether increased susceptibility to opportunistic infections or tumor emergence takes place in the affected individuals.