Objective: To determine the frequency of unsuspected minor illness or
injury in a group of patients frequently seen in the ED for acute into
xication. Methods: The medical records of the 20 patients seen most fr
equently in the ED for acute intoxication in 1993 were reviewed for th
e number of ED visits for intoxication, the number of associated docum
ented episodes of minor trauma or illness, the extent of ED workup of
discovered illness or injury, and patient disposition from the ED. Res
ults: The 20 study patients were evaluated in the ED 1,858 times in 19
93 for acute intoxication, a mean of 92.5 visits/patient (+/-26.6). Th
e most frequent injury was minor trauma above the neck, occurring a me
an of 9 times (+/-3.6) in each of the study patients during 1993, Eval
uation included repeated neurologic examinations and frequent radiogra
phy of the cervical spine (n = 80), skull (n = 5), facial bones (n = 6
), and mandible (n = 5). A limited number of head CT scans also were d
one (n = 8). The most frequent minor illnesses were gastritis (n = 7),
managed with hydration, and mild hypothermia (n = 6), managed with pa
ssive rewarming. Conclusions: The incidence of unsuspected minor illne
ss or injury in this patient group was substantial, While most unsuspe
cted medical problems had little clinical significance, some were pote
ntially dangerous, and some necessitated hospitalization (e.g., hypoth
ermia, hematemesis, and respiratory depression).