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Biomedical subjects

M N Bagg

Publications and source records attributed to M N Bagg.

6 recordsLinked to original sources

Diverticular complications of renal failure.

Ten patients with chronic renal failure presented with complications of colonic diverticula. Five had acute diverticulitis, 4 perforated diverticula, and 1 lower gastrointestinal hemorrhage. Symptoms were less severe than expected. In 3 the diagnosis was first suspected when free intra-abdominal air was detected. Seven patients had laparotomy, 5 emergently. Radiologists should be aware of the potential for diverticular complication in patients with renal failure, even with minimal or absent symptoms. Suspicion of colonic pathology either clinically or radiographically should be evaluated promptly so that aggressive therapy can begin.

Acute Disease

Pelvic actinomycosis associated with intrauterine devices.

The authors describe two women with pelvic pain, long-term use of an intrauterine device, and a pelvic mass due to Actinomyces israelii. The diagnostic imaging findings were nonspecific but included mass effect and mucosal irregularity of the rectosigmoid colon at barium enema examination and complex masses and inflammatory changes at computed tomography and magnetic resonance imaging. Radiologists should be aware of the imaging findings of this potentially lethal but curable condition.

Actinomycosis

An analysis of computed tomographic brain scans. A computer-based study.

A microcomputer was used to analyse prospectively 1,000 sequential computed tomographic (CT) brain scans to assess whether the scanner was being used in a cost-effective and efficient manner. Of the patients scanned 58% had cerebral lesions. All the usual indications for CT examination were shown to be worth while, the exception being psychiatric cases.

Adolescent

Comparison of patient responses to high- and low-osmolality contrast agents injected intravenously.

Low-osmolar intravascular radiographic contrast media have recently been introduced for clinical use in an attempt to reduce the frequency and severity of side effects. This study was undertaken to test patients' subjective reactions to IV injection of three different types of contrast media--iopamidol, meglumine/sodium ioxaglate, and sodium iothalamate. The low-osmolar contrast media (ioxaglate, iopamidol) were found to have a significantly lower frequency of nonidiosyncratic reactions than the high-osmolar contrast media (iothalamate). However, in view of the present cost of low-osmolar contrast media and the relatively minor nature of nonidiosyncratic reactions, it is concluded that high-osmolar contrast media should remain the contrast media of choice for routine IV use.

Contrast Media