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Biomedical subjects

J W Barry

Publications and source records attributed to J W Barry.

14 recordsLinked to original sources

Transcatheter hemostasis in the genitourinary tract.

Transcatheter hemostasis is applicable in a large variety of causes of genitourinary hemorrhage. The method is particularly useful in the management of trauma since temporary occlusion of the bleeding vessel usually produces cessation of hemorrhage without significant sacrifice of additional parenchyma. Control of arteriovenous fistulas requires an assessment of flow characteristics and careful tailoring of catheter and embolization technique; large emboli or glue is frequently required for occlusion of large fistulas, whereas small ones can be treated with Ivalon. Hemorrhage from renal or pelvic neoplasm is also effectively managed by transcatheter therapy.

Adenocarcinoma

Ferromagnetic embolization. Experimental evaluation.

Flow of embolized carbonyl iron particles under the influence of a magnetic field was evaluated in vitro and in vivo. The magnetic force caused particles to form aggregates, obstructing tubing or vascular beds. In dogs, 0.5 cc of iron particles injectged into a renal artery under magnetic control caused total occlusion and necrosis; injection without magnetic control caused little damage and no change in function. There was little systemic toxicity. Injection of iron particles under magnetic control may be helpful in embolic arterial occlusion and localized irradiation, hyperthermia, and chemotherapy.

Animals

Detection of hemorrhage in a patient with cecal varices using 99mTc-sulfur colloid.

Colonic or ileal varices secondary to portal hypertension or superior mesenteric vein obstruction may present with significant hemorrhage which is difficult to diagnose by angiography. In a patient with lower gastrointestinal hemorrhage and colonic varices, a 99mTc-sulfur colloid scan demonstrated the varices and extravasation into the cecum. Extravasation was not demonstrable by angiography.

Cecum

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Costs and Cost Analysis

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Costs and Cost Analysis

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Costs and Cost Analysis