Biomedical subjects
S P Bohrer
Publications and source records attributed to S P Bohrer.
Boehler's angle: a reappraisal.
STUDY OBJECTIVES: To reappraise Boehler's angle and evaluate factors, including centering of the central beam, sex of subjects, and side of the body, that may affect angle measurement. DESIGN: Retrospective clinical review. SETTING: Emergency department, Level I trauma center. TYPE OF PARTICIPANTS: 120 consecutive patients radiographed for ankle injury who had normal bones on the ankle and/or foot radiographs. MEASUREMENTS AND MAIN RESULTS: The mean and SD of Boehler's angle were 30 degrees C +/- 6 degrees (range, 14 degrees to 50 degrees). There was no difference in Boehler's angle between male and female subjects (P greater than .05) or between left and right feet (P greater than .05). Slight variations in central beam location for ankle and foot radiographs had no significant effect on Boehler's angle. CONCLUSION: If 28 degrees is taken as the lower limit of normal for Boehler's angle, 37 cases (31%) would be false-positive "abnormal." The use of 20 degrees as the lower limit may decrease the number of false-positive to three cases (2.5%); using 18 degrees (mean -2 SD) reduces the false-positive rate to less than 1% (one case).
The incidence of cone epiphyses and ivory epiphyses of the hand in Nigerian children.
Radiographs of the left hand of 594 children from Ibadan, Nigeria were inspected for skeletal anomalies to determine differences in the incidence of cone and ivory epiphyses for the rich and poor children and differences in incidence for four hemoglobin types. Ivory epiphyses ovvurred more often in children in the lower socio-economic class and children with hemoglobin AA. The cone epiphyses observed in Hb SS children were primarily a result of bone infarcts, while cones in children of other hemoglobin types appeared to be normal variants. The incidence of ivory epiphyses was higher in the Nigerian children than in American black children in the Ten-State Nutrition Survey. The incidence of cone epiphyses was much lower than those reported for other normal populations.
A comment on kola nuts and traffic accidents.
Explore the source record for details and available documents.
The uses and abuses of skull X-rays in head injury.
Explore the source record for details and available documents.
Lung cancer risk in pipe and cigar smokers.
Explore the source record for details and available documents.
Right upper quadrant gas shadows.
Explore the source record for details and available documents.
Renographic studies in vesical schistosomiasis in children.
Renal function in children infected with Schistosoma haematobium and in uninfected controls has been studied with the I131 hippuran renogram. The results suggest that renographic abnormalities which persist after a water-load are more common in infected children who have heavy egg-output in their urine, and abnormal pyelograms. Specific chemotherapy restored the renogram to normal within 3 weeks in several cases. It is suggested that the renogram is useful for the assessment and followup of patients with vesical schistosomiasis, and further work should be done to more clearly define the renal function of such patients.