[The epidemiology and clinical features of anaphylactic and anaphylactoid reactions in the perioperative period in Japan].

In an attempt to review the Japanese epidemiology of the anaphylactic and/or anaphylactoid reactions in the perioperative period, we investigated 105 cases with clinical features of anaphylactic and/or anaphylactoid reaction, which are reported in the Japanese anesthesiology-related journals from 1952 to 1990. Eighty-nine percent of the cases were reported during the last decade. There were 66 males and 34 females. The majority of the patients were below 60 years of age, and most of the patients were in their teens and fifties. Ninety percent of the patients had no past history of drug-induced allergy nor tendencies of atopy. Ninety-four percent of the patients recovered completely without any sequelae, and 0.95 percent of them recovered with serious complications. Deaths occurred in 4.67% of the patients. Most frequent clinical signs were cardiovascular (91.4%) and cutaneous (84.8%) manifestations. Respiratory, signs appeared in 41% of the patients. Patients are frequently unconscious and covered with drapes, and early signs and symptoms of anaphylaxis can be masked. In 25% of the patients cardiovascular collapse, including cardiac arrest and undetected blood pressure, appeared as the first noticeable sign. Causative drugs were confirmed immunologically in 5.7% of the patients. In other cases, causative drugs were presumed based on clinical course. Causative drugs and presumed causative drugs were varied, including blood and blood products (24 cases), intravenous anesthetics (19 cases), local anesthetics (15 cases), and muscle relaxants (9 cases), which were used generally in the perioperative period.