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Biomedical subjects

I S Johnsrude

Publications and source records attributed to I S Johnsrude.

At least 19 recordsLinked to original sources
PubMed1989

Transrenal ureteral occlusion with Gianturco coils and gelatin sponge.

The authors report the use of Gianturco coils and gelatin sponge plugs to achieve complete occlusion of nine ureters in five patients with advanced pelvic malignancies and lower urinary tract fistulas. The method is simple to apply, is readily available, and to date has been associated with no significant complications. These results suggest that, before more elaborate methods of ureteral occlusion are applied, the use of coils and gelatin sponge should be considered as the primary method of ureteral occlusion. Further work is needed to elaborate the exact mechanism by which these materials cause occlusion.

Embolization, Therapeutic↗
PubMed1989

Split 24-F Amplatz dilator for percutaneous extraction of an intravascular bullet: case report and technical note.

An intravascular bullet was retrieved percutaneously in a 17-year-old boy with the use of a modified 24-F Amplatz dilator. The dilator was modified by means of a longitudinal incision with removal of a wedge at the distal tip of the tapered portion of the dilator. The bullet, which was located in the left pulmonary artery, was removed via the right femoral vein. No complications occurred.

Adolescent↗
PubMed1988

The bird's nest inferior vena cava filter: progress report.

The bird's nest inferior vena cava filter, in clinical trial since 1982, has been placed in 568 patients at risk for pulmonary embolism. Of the 481 patients in whom the filter had been in place for 6 months or more, 440 were followed up clinically. The prevalence of clinically suspected recurrent pulmonary thromboembolism was 2.7% (12 patients) and that of inferior vena cava filter occlusion was 2.9% (13 patients). With the initial filter design, filter migration occurred in five patients. No migrations have occurred in the 147 patients treated with the filter after its modification to improve the anchoring system for greater stability. The bird's nest filter has proved safe and effective in the prevention of pulmonary embolism.

Clinical Trials as Topic↗
PubMed1985

Percutaneous catheter balloons: failure to deflate.

Three examples of permanently inflated transluminal catheter balloons are presented. Two of these occurred during attempted percutaneous transluminal angioplasty. Nonsurgical solutions, which were successful in each case, are described. Percutaneous puncture with a needle or a larger diameter coaxial catheter under fluoroscopic guidance may be useful when this complication occurs during attempted balloon angioplasty or embolization with proximal balloon occlusion in large vessels.

Aged↗
PubMed1979

Arteriographic embolization for control of recurrent severe gastric hemorrhage in a 10-yr-old boy.

Severe stress ulceration or stress gastritis may occasionally produce uncontrollable gastric hemorrhage in the pediatric age group. Modern arteriographic techniques utilizing selective embolization to occlude demonstrated bleeding arteries can successfully control such hemorrhage and avoid emergency destructive surgical resection. A 10-yr-old boy, in whom a previous 80% gastric resection failed to control life threatening hemorrhage, is presented, with roentgenographic demonstration of the procedure and the successful control of his gastric bleeding.

Angiography↗
PubMed1979

Vessel occlusion with transcatheter electrocoagulation: initial clinical experience.

Transcatheter electrocoagulation (TCEC) was used for vessel occlusion in combination with embolization by Gelfoam and/or Ivalon in six patients in whom other interventional or surgical techniques were considered dangerous or unfeasible. The technique was effective in decreasing or obliterating the blood supply to variously located lesions in all cases. The only complications were small skin burns in one patient and a small ulceration of the upper lip in another.

Adult↗
PubMed1978

The role of the radiologist in acute gastrointestinal bleeding.

Angiography is valuable in the diagnostic and therapeutic management of the patient with acute gastrointestinal bleeding. It should be preceded by endoscopy in acute upper gastrointestinal bleeding, but in acute lower gastrointestinal bleeding, angiography is firmly established as the primary diagnostic modality. Although angiography is less useful in chronic gastrointestinal bleeding, it may show the underlying pathologic lesion. Vasonconstrictive and embolic therapeutic angiographic procedures are particularly valuable in the patient with multiple system disease.

Celiac Artery↗
PubMed1978

Clinical use of transcatheter electrocoagulation.

Transcatheter electrocoagulation is an effective method of experimental vessel occlusion even in the presence of thrombocytopenia and heparinization. This technique was used to occlude 13 arteries in 3 patients. In vitro testing suggests that intra-arterial bipolar platinum electrodes may achieve the therapeutic objectives more rapidly and with less risk, but more investigative work is required.

Arteries↗
PubMed1977

Renal cyst puncture and abscess formation.

Percutaneous needle puncture and aspiration of suspected cystic renal masses may provide accurate diagnosis in selected cases. However, renal cyst puncture is not a totally innocuous procedure and certain complications may be encountered. Report is made of 2 cases of renal cyst puncture followed by abscess formation, necessitating surgical intervention. An improved technique involving surgical preparation of the operative area and utilization of double-needle method of cyst puncture is advocated.

Abscess↗
PubMed1977

Late complications of abdominal aortic reconstructive surgery: roentgen evaluation.

During a 5-year period from 1969 to 1974, 53 (8.5%) of 631 patients developed late complications following abdominal aortic reconstructive surgery. Occlusion was the most frequent complication and occurred in 4%. Others included stenosis, false aneurysm, enteric fistula and infection. Late complications were demonstrated by roentgenographic methods. Angiography was the most valuable roentgen study. It is indicated in all patients suspected of having delayed complications except those with unstable life-threatening hemorrhage. Additional roentgenographic studies including the barium enema and barium meal may help make the diagnosis and exclude other entities. In any patient with an abdominal aortic graft and gastrointestinal bleeding, the diagnosis of an aorto-enteric fistula should be considered until otherwise proven.

Adult↗