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Biomedical subjects

R F Dondelinger

Publications and source records attributed to R F Dondelinger.

At least 91 records · Page 5Linked to original sources

Local thrombolytic infusion in arterial ischemia of the upper limb: mid-term results.

PURPOSE: Evaluation of local thrombolytic infusion in arterial ischemia of the upper limbs. METHODS: Thirteen patients, 4 male and 9 female, aged 31 to 83 (mean 63.6) were treated. The occlusion was determined to be thrombosis in 6 and cardiogenic embolism in 7 patients. Duration of symptoms varied from 2 hours to 3 weeks. Streptokinase (SK) was used in 4 patients at a rate of 5,000 units per hour, Urokinase (UK) in 8 patients at a rate of 75,000 units per hour and r-tPA in 1 patient at a rate of 4 mg per hour for 5 hours. Mean duration of infusion was 16 hours (3-39 hr) for SK and 35 hours (10-93 hr) for UK. Heparin was administered concommitantly at a rate of 300 to 1000 units per hour without a loading dose. RESULTS: Clinical limb salvage was obtained in all patients. Angiography showed complete clot dissolution and full clinical recovery in 8 patients. Five patients had partial clot clearing, 3 with full recovery and 2 with modest residual symptoms. One patient incurred a catheter-related transient cerebral ischemia, 1 patient a large arm hematoma from catheter-related trauma and 6 patients a moderate puncture site hematoma. Three patients died during the first month due to stroke, ventricular fibrillation, or cardiac failure, and 1 patient after 22 months from cardiac failure. No limb ischemia recurred during a follow-up of 1 to 5 years. CONCLUSION: Local thrombolytic infusion is a safe and effective treatment for acute and subacute upper extremity arterial thromboembolism.

Arm↗

Treatment of Budd-Chiari syndrome by metallic stent as a bridge to liver transplantation.

A 49-year-old male with Budd-Chiari syndrome complicated by liver cirrhosis and intractable ascites is reported. The left hepatic vein was stenosed by a short subocclusive ostial web; the right and medial hepatic veins were thrombosed. A spontaneous intrahepatic portosystemic shunt had developed between the left portal and left hepatic veins. After ineffective balloon angioplasty, the left hepatic venous outflow was restored by placement of a 10-mm-diameter Wallstent across the web via a femoral approach. The hepatic venous pressure dropped from 29 to 12 mmHg. Rapid clinical improvement followed. The patient underwent liver transplantation 3 months later in stable condition.

Budd-Chiari Syndrome↗

Percutaneous treatment of pyogenic liver abscess: a critical analysis of results.

Nineteen patients who had pyogenic liver abscesses underwent percutaneous treatment assisted by computed tomography. Percutaneous drainage was performed with Fr 8-14 catheters in 12 patients and percutaneous aspiration in 7 patients. A solitary abscess was present in 15 patients and multiple abscesses were present in 4. The average drainage duration was 26 days. Successful treatment was obtained in 16 of 19 (84%) cases. One abscess recurred and was cured by repeat drainage. Two patients died. Reviewing 14 reports from the literature with a total of 252 patients treated percutaneously, an overall success rate of 77% and a mortality rate of 6% was found.

Catheterization↗

Gianturco self-expanding stents: clinical experience in the vena cava and large veins.

Twenty-five patients with stenosis of the vena cava (21) and other large veins (4) have been treated with self-expanding Gianturco metallic stents. Eighteen patients had superior vena cava syndrome. In 17, the stricture was due to malignant superior vena cava compression recurrent after maximum tolerance radiotherapy and/or chemotherapy. In 16 of these patients there was early symptomatic relief. In 1 patient with a benign posttraumatic superior vena cava stricture, the stenosis was not relieved, and occlusion occurred after 1 month. Stenoses associated with dialysis shunts were relieved in 2 other patients. Two malignant and one benign inferior vena cava stenoses were relieved either until death, or in the benign case, for 30 months. One malignant subclavian vein obstruction occluded after 24 h due to stent misplacement and another with extrinsic mediastinal compression remained patent until death, extensive thrombus having been lysed prior to stent placement. The results of this short series suggest that the Gianturco self-expanding stent in the vena cava and large veins is easy and safe to place, and in most cases produces almost immediate palliation of the distressing effects of venous obstruction, often in a preterminal and inoperable patient.

Constriction, Pathologic↗

Results of a multicenter study of the retrievable Tulip Vena Cava Filter: early clinical experience.

PURPOSE: To evaluate clinically a new, retrievable vena caval filter in a multicenter study. METHODS: The Tulip filter is a stainless steel half-basket that is suitable for antegrade or retrograde insertion via an 8.5 Fr introducer sheath. The filter can be retrieved via the jugular approach using an 11 Fr coaxial retrieval system. Forty-eight filters were implanted via the femoral approach and 38 via the jugular approach in 83 patients. Follow-up examinations (plain films, colorcoded duplex sonography) were performed up to 3 years after filter insertion (mean 136 days) in 75 patients. Twenty-seven patients were screened by colorcoded duplex sonography for insertion site thrombosis. RESULTS: An appropriate filter position was achieved in all cases. Insertion problems occurred in 3 cases; these were not due to the filter design but to an imperfect prototype insertion mechanism that has now been modified (n = 2) or a manipulation error (n = 1). In 2 of these cases the filters were replaced percutaneously; 1 patient required venotomy for filter removal. No further complications due to filter insertion occurred. Two filters were used as temporary devices and were successfully removed after 6 and 11 days, respectively. There was 1 fatal recurrent pulmonary embolism (PE) and 2 non-fatal PE, 5 complete and 3 partial caval occlusions, and 3 caudal migrations of the filter. Insertion site venous thrombosis was not seen in the 27 patients monitored for this complication. CONCLUSION: Precise placement of the Tulip filter is feasible by either access route and the device appears mechanically stable. Further observations are needed to confirm that safe filter removal is practical up to 10 days after its insertion.

Adult↗

Treatment of symptomatic pelvic varices by ovarian vein embolization.

PURPOSE: Pelvic congestion syndrome is a common cause of chronic pelvic pain in women and its association with venous congestion has been described in the literature. We evaluated the potential benefits of lumbo-ovarian vein embolization in the treatment of lower abdominal pain in patients presenting with pelvic varicosities. METHODS: Nineteen patients were treated. There were 13 unilateral embolizations, 6 initial bilateral treatments and 5 treated recurrences (a total of 30 procedures). All embolizations were performed with either enbucrilate and/or macrocoils, and there was an average clinical and Doppler duplex follow-up of 15.4 months. RESULTS: The initial technical success rate was 96.7%. There were no immediate or long-term complications. Variable symptomatic relief was observed in 73.7% of cases with complete responses in 57.9%. All 8 patients who had partial or no pain relief complained of dyspareunia. The direct relationship between varices and chronic pelvic pain was difficult to ascertain in a significant number of clinical failures. CONCLUSION: Transcatheter embolization of lumbo-ovarian varices is a safe technique offering symptomatic relief of pelvic pain in the majority of cases. The presence of dyspareunia seemed to be a poor prognostic factor, indicating that other causes of pelvic pain may coexist with pelvic varicosities.

Adult↗