PubMed Health⌕ Search

Biomedical subjects

H C Crow

Publications and source records attributed to H C Crow.

27 records · Page 2Linked to original sources
PubMed1979

Real-time ultrasound: its role in abdominal examinations.

Until recently, real-time ultrasound has not had a central role in abdominal examinations due to the limited resolution of the scanners. However, a new generation of high-resolution real-time scanners has been introduced in the past year, and these machines are now being promoted as principal abdominal scanners. The authors have used a mechanical, phase-focused, annular array in conjunction with a conventional articulated-arm B-scanner for over a year in more than 2,000 examinations. Based on this experience, they present the argument that high-resolution real-time should be used as the standard technique for abdominal examination, and that it is not necessary to have a conventional articulated-arum scanner as backup.

Abdomen↗
PubMed1977

Ultrasonic and radiographic cholecystography.

To define the relative merits of radiographic and ultrasonic cholecystography, we studied 208 randomly selected patients with possible cholelithiasis. The patients underwent both procedures, and the results were interpreted in blind fashion. Two hundred patients had satisfactory confirmation of their diagnosis, by either a well visualized radiographic cholecystogram or operation or both. The overall accuracy of the ultrasonic examination was 93 per cent, with a false-negative rate of 11 and an indeterminate rate of 4 per cent. The indeterminate rate was 24 per cent for the single-dose oral cholecystogram and 8 per cent for the double-dose oral cholecystogram. Both ultrasonic cholecystography and radiographic cholecystography are useful to detect gallstones. Our findings support using single-dose oral cholecystography as the routine first examination. If the gallbladder is not satifactorily visualized, ultrasonic cholecystography can be performed immediately. In an emergency or for patients who might be pregnant, ultrasonic cholecystography is available as the initial examination.

Administration, Oral↗
PubMed1976

Expanded criteria for the ultrasonic diagnosis of gallstones.

The ultrasonic examination of the gallbladder for stones can be an accurate procedure if an expanded set of criteria are used. Employing such criteria we have been able to reach a diagnosis in 92 percent of examinations with no false positive and no false negative results. The expanded criteria are described and several illustrative examples are shown.

Cholelithiasis↗