Little work has been carried out on the epidemiology of the two serious skin reactions--toxic epidermal necrolysis (TEN) and Stevens-Johnson syndrome (SJS). We collected details of all the hospitalized cases of TEN and SJS in the Federal Republic of Germany for the years 1981 through 1985 inclusive. Inquiries by telephone, letter, and personal visits produced an overall response of 91%; 259 cases of TEN and 315 cases of SJS were identified. From these data, we were able to calculate an overall annual risk of 0.93 and 1.1 per million for TEN and SJS, respectively. The average age group was higher for TEN (63 years) than for SJS (25 years). Women are markedly more at risk for TEN in the ratio of 2:1, these figures being reversed for SJS. The mortality was 34% (87/259) for TEN and only 1% (2/315) for SJS. An association with previous medication defined as "definite, probable, possible" could be established for 89% of cases of TEN and 54% of cases of SJS. The drugs most commonly involved were antibiotics (TEN, 40%; SJS, 34%), followed by the analgesics (TEN, 23%; SJS, 33%). As with the drug groups, the incidences being based on the defined daily doses, were high for sulfonamides, beta-lactam antibiotics, and some nonsteroidal anti-inflammatory drugs.
Theophylline metabolism and elimination during childhood are age-dependent. The total clearance, which is the sum of metabolic and renal clearances is highest in infants and young children. To differentiate between the two pathways, theophylline concentrations were measured in both serum and urine in 16 children aged 2 weeks-16 years using the fluorescence polarization immunoassay. It was found that both partial clearances assume maximal values at about the same age, but the fraction of total clearance attributable to the renal route decreases continuously.
Die Untersuchungen, fiber welche ich im folgenden berichte, stfitzen sich auf groge Versuchsreihen, die j etzt vor einem Jahre in der Entwicklung begriffen waren; als ich dem t~ufe nach Miinster folgte. Die Untersuchungen muBten seinerzeit unterbrochen werden und konnten bis heute noch nicht wieder aufgenommen werden. Nachdem aber jetzt auch in Mfinster die M6glichkeiten geschaffen worden sind, die Versuche fortzusetzen, erscheint es mir an der Zeit, zusammenfassend die bisherigen Ergebnisse zusammenzustellen. Ich m6chte auch bei dieser Ge-
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