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Biomedical subjects

D Welger

Publications and source records attributed to D Welger.

5 recordsLinked to original sources
PubMed2000

Current practice of temporary vena cava filter insertion: a multicenter registry.

PURPOSE: To evaluate the current practice of temporary vena cava filter placement and its complications. MATERIALS AND METHODS: A multicenter registry was conducted from May 1995 until May 1997 using a standardized questionnaire. One hundred eighty-eight patients were evaluated. Patient characteristics, filter indications, filter characteristics, and complications were registered. RESULTS: Deep vein thrombosis was proven in 95.2% of the patients. Main filter indication was thrombolysis therapy (53.1%). Average filter time was 5.4 days. An Antheor filter was inserted in 56.4%, a Guenther filter in 26.6%, and a Prolyser filter in 17.%. Transfemoral filter implantation was slightly preferred (54.8%). Four patients died of pulmonary embolism (PE) during filter protection. Major filter problems were filter thrombosis (16%) and filter dislocation (4.8%). When thrombus was found in or at the filter before explantation, additional thrombolysis was performed in 16.7%, additional filter implantation in 10%, and thrombus aspiration in 6.7%; 4.8% of filters were replaced with permanent filters. DISCUSSION: Temporary vena cava filters are placed to prevent PE in a defined patient population. Despite their presence, PEs still occur in a small percentage. Problems of filter thrombosis and dislocation have to be solved. CONCLUSION: The results of this multicenter registry support the need for innovative filter design, as well as a randomized, prospective study.

Adolescent↗
PubMed1990

[Diagnostic value of digital subtraction angiography in chronic venous insufficiency].

The first 117 investigations in chronic venous insufficiency by means of the technique of digital subtraction angiography (DSA) are reported. According to our experiences hitherto made this technique with peripheral intravenous injection of contrast remedies is excellently suited for the phlebography of the pelvic and vena cava regions as well as of the region of upper arm and shoulder, not so much, however, for the phlebography of the leg. By decrease of the concentration of the contrast remedy and the total quantity of the contrast remedy a reduction of the patient's stress and the risk of the examination is the result.

Angiography, Digital Subtraction↗
PubMed1988

[Associated thrombotic processes of the superficial, perforating and intramuscular venous system in patients with acute phlebothrombosis of the lower extremities].

In a retrospective study 100 phlebograms of the legs of patients with definitive acute phlebothrombosis were examined for additional thrombotic processes in the superficial venous system, in the perforating and muscular veins. They could be confirmed in 77% of the cases, whereby preferredly the superficial venous system (long saphenous vein and lateral branches) were affected. A temporary coordination of superficial thrombophlebitis and phlebothrombosis cannot be made. At first it is adhered to the approved strategy of diagnosis that an acute superficial thrombophlebitis is no indication for phlebography. It is demanded the immediate application of invasive and non-invasive examination methods, when there is the least clinical suspicion of a deep venous thrombosis.

Female↗
PubMed1988

[Acute phlebographic diagnosis of thrombotic complications in gynecology and obstetrics].

From 1971 to April 1986 phlebography was performed in a total of 459 patients suspected clinically having an acute phlebothrombosis. From 112 female patients (24.4%) coming from the departments of gynaecology and obstetrics in 94 cases an acute or subacute phlebothrombotic process was proved phlebographically. The main age of these female patients was 29 +/- 11 years (17 to 76 years). A combined ileo-femoral-crural vein thrombosis in 44.7% was the most frequent localization and expansion, however, an isolated thrombotic process of pelvic veins was found in 25.6% only. A coincidence of the calculated age of thrombosis and clinical symptoms could be proved in 62 female patients (66%), but often the phlebographically calculated thrombus age was much longer than suspected by clinical symptoms alone. Foudroyant pulmonary embolism was observed in each fifth or sixth patient. The special technique of phlebographic investigation is discussed in detail with the judgement of a differentiated therapy of phlebothrombosis and pulmonary embolism.

Adolescent↗