United States Army Rangers in Somalia: an analysis of combat casualties on an urban battlefield.

BACKGROUND: This study was undertaken to determined the differences in injury patterns between soldiers equipped with modern body armor in an urban environment compared with the soldiers of the Vietnam War. METHODS: From July 1998 to March 1999, data were collected for a retrospective analysis on all combat casualties sustained by United States military forces in Mogadishu, Somalia, on October 3 and 4, 1993. This was the largest and most recent urban battle involving United States ground forces since the Vietnam War. RESULTS: There were 125 combat casualties. Casualty distribution was similar to that of Vietnam; 11% died on the battlefield, 3% died after reaching a medical facility, 47% were evacuated, and 39% returned to duty. The incidence of bullet wounds in Somalia was higher than in Vietnam (55% vs. 30%), whereas there were fewer fragment injuries (31% vs. 48%). Blunt injury (12%) and burns (2%) caused the remaining injuries in Somalia. Fatal penetrating injuries in Somalia compared with Vietnam included wounds to the head and face (36% vs. 35%), neck (7% vs. 8%), thorax (14% vs. 39%), abdomen (14% vs. 7%), thoracoabdominal (7% vs. 2%), pelvis (14% vs. 2%), and extremities (7% vs. 7%). No missiles penetrated the solid armor plate protecting the combatants' anterior chests and upper abdomens. Most fatal penetrating injuries were caused by missiles entering through areas not protected by body armor, such as the face, neck, pelvis, and groin. Three patients with penetrating abdominal wounds died from exsanguination, and two of these three died after damage-control procedures. CONCLUSION: The incidence of fatal head wounds was similar to that in Vietnam in spite of modern Kevlar helmets. Body armor reduced the number of fatal penetrating chest injuries. Penetrating wounds to the unprotected face, groin, and pelvis caused significant mortality. These data may be used to design improved body armor.

Biliary dyskinesia: a study of more than 200 patients and review of the literature.

The diagnosis and treatment of biliary dyskinesia, defined as symptoms of biliary colic in the absence of gallstones, remains controversial and has been the subject of several previous retrospective reviews. The diagnosis and treatment of biliary dyskinesia based on the CCK-HIDA scan, and the outcome with cholecystectomy for billary dyskinesia, are reviewed. We add more than 200 cases of cholecystectomy for biliary dyskinesia, and compare our results with those of previous reports. We retrospectively reviewed 295 patients with biliary dyskinesia who underwent cholecystectomy at three military hospitals between 1988 and 1995. All patients had symptoms consistent with biliary colic and preoperative evaluations that revealed no evidence of cholelithiasis. Pathology specimens were reviewed for cholelithiasis and pathologic changes. Data were retrieved by chart review and clinic evaluation of new patients. Individual follow-up of each patient was attempted. Follow-up was achieved in 218 of the 295 patients for a rate of 74%. The mean duration of follow-up was 506 days with a range of 22 days to 6 years. Two hundred patients (92%) had CCK-HIDA scans with an ejection fraction (EF) >=<50%. Eighteen patients (8%) had an EF >50% but did have reproduction of their symptoms with CCK injection. In the group with an EF <50%, 94.5% were improved or cured with cholecystectomy. In the group with an EF >50% and pain reproduction, the improved or cured rate was 83.4%. CCK-HIDA scans are useful for diagnosing biliary dyskinesia and predicting improvement after cholecystectomy. Patients presenting with biliary dyskinesia and an EF <50% on CCK-HIDA scan have 94% improvement or resolution of their symptoms after cholecystectorny. CCK-HIDA scans should be employed early in the evaluation of billary colic with no evidence of cholelithiasis (i.e., with a normal ultrasound scan). When test results are abnormal, cholecystectomy should be performed, since the results in this setting approach those of cholecystectomy for stone disease (>90% cured/improved). In the current climate of cost containment, these excellent results would obviate the need for extensive and expensive medical testing before surgical therapy is recommended.