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Biomedical subjects

G Rudofsky

Publications and source records attributed to G Rudofsky.

At least 73 records · Page 4Linked to original sources

Duplex sonography of venous atheromatosis found in the venous part of hemodialysis fistula.

Manifestation of atherosclerosis is one of the alterations in venous bypass grafts. Its progression and morphology usually cannot be described by sonography. The venous part of a hemodialysis fistula can be compared to a venous bypass graft. The authors investigated the venous part of hemodialysis fistula in 16 patients. They found atherosclerosis in 7 patients. The morphologic findings were similar to arterial atherosclerosis. Looking at the venous part of hemodialysis fistulas may be an adequate model to investigate the initiation and progression of atherosclerotic lesions in venous bypass grafts.

Adult↗

Thromboprophylaxis with low-molecular-weight heparin in outpatients with plaster-cast immobilisation of the leg.

Deep-vein thrombosis is common after plaster-cast immobilisation for traumatic injury. We did a randomised prospective study of the effect of low-molecular-weight heparin on the incidence of deep-vein thrombosis in patients with minor injuries treated with plaster-cast immobilisation of the leg. A control group (n = 163) received no prophylaxis, the prophylaxis group received low-molecular-weight heparin once daily (n = 176). The incidence of deep-vein thrombosis in the prophylaxis group was 0% (one tailed p < 0.006) vs 4.3% in the control group. No severe side-effects of low-molecular-weight heparin were observed. Thromboprophylaxis with low-molecular-weight heparin once daily is effective in reducing the risk of deep-vein thrombosis in outpatients with plaster-cast immobilisation of the leg.

Adolescent↗

[Physical prevention of thrombosis with the ankle joint with the motorized ankle joint movement device. Initial results of a clinical study].

Between 1993 and 1994 the value of the "Artroflow" device in deep venous thrombosis was tested in 95 trauma surgical high risk patients. Parallel to the application of Heparin and physical methods, the "Artroflow" device was employed. The test and compare group showed an equal amount of risk parameters and comparable injuries. In all patients until full mobilization a weekly clinical examination, a compression sonography of the deep leg veins and a venous Doppler examination was performed. In the test group 1 deep venous thrombosis (2.3%) and no clinically manifest lung embolism occurred. In the control group, the deep venous thrombosis rate was 21.6%. This showed a highly significant drop of the deep venous thrombosis rate in trauma surgical patients (p < 0.0041 Fisher test) and allows us to suggest the use of the "Artroflow" device in high risk patients parallel to heparin prophylaxis.

Adolescent↗

[Recurrent thromboses in a 32-year-old pregnant patient with permanent vena cava filter].

Vena cava-filters are implanted where there is a risk of pulmonary embolisation as cases of thrombosis. Permanent vena cava-filters can induce various complications during the remainder of the patient's life. A case of a 32-year-old woman who became pregnant seven years after the implantation of a Kimray-Greenfield-Filter and gave birth to a healthy child is presented. During pregnancy and after the birth of a healthy child she suffered from two new thrombotic events. After the delivery, a complete thrombosis of the vena cava inferior, both venae iliacae communes and the right vena renalis were shown by computer-tomography and phlebography. Inspite of these longterm complications, pregnancy is not contraindicated after implantation of a permanent vena cava-filter.

Adult↗

[Implementing ambulatory prevention of thrombosis with low molecular weight heparin in plaster immobilization of the lower extremity].

Plaster cast immobilisation following trauma is a major risk factor for the development of deep vein thrombosis. In our controlled, randomized and prospective study in patients with minor injuries the incidence of deep vein thrombosis was 4.3% in conservatively treated outpatients with plaster cast immobilisation of the leg (n = 163 control group without prophylaxis). By application of low molecular weight heparin once daily the number of deep vein thrombosis in the prophylaxis group (n = 176) was reduced to 0% (p = 0.006). No severe side effects of low molecular weight heparin were observed. Subcutaneous injections were self-applicated by 89% of males and 72% of females. We conclude that thromboprophylaxis with low molecular weight heparin once daily is effective to reduce the risk of deep vein thrombosis in outpatients with plaster cast immobilisation of the leg.

Adolescent↗

Treatment costs of peripheral arterial occlusive disease in Germany: a comparison of costs and efficacy.

Significant increases in the costs of the health system in all Western countries indicate the importance of both economic and efficacy studies in evaluating the various treatments for peripheral arterial occlusive disease (PAOD). On the basis of this background, an attempt was made to compare the efficacy and the costs of different treatment regimens for PAOD using data from the literature. In severe PAOD, the therapeutic approaches are supplementary methods that must be applied according to the patient's situation; the treatment cannot be chosen on the basis of its costs. In patients with claudication, different treatment alternatives such as physical exercise, oral or intravenous medical treatment, and percutaneous transluminal angioplasty (PTA) exist, and cost-efficacy comparisons can be made among these. Oral treatment with vasoactive compounds results in efficacy costs ranging from DM 37.31 ($22.61 U.S.) to DM 146.16 ($88.58 U.S.) per patient for a drug-induced 10% increase of pain-free walking distance (PFWD) using the cheapest therapeutic alternative. Long-term physical exercise (twice for 2 h/week for 24 months) leads to efficacy costs of DM 189.09 ($114.60 U.S.) per patient for a 10% increase of PFWD. Intensive therapeutic regimens using intravenous infusions produce efficacy costs of DM 116.61 ($98.27 U.S.) to DM 2,529.81 ($1,533.22 U.S.) per patient, but result in an average improvement in PFWD of 21% to 62% within 2 to 4 weeks. PTA with a cost of DM 6,000 ($3,636.40 U.S.) per intervention is the most expensive method of treatment.(ABSTRACT TRUNCATED AT 250 WORDS)

Arterial Occlusive Diseases↗

Doppler ultrasonography as a pre-operative aid to base the forearm flap on the radial or ulnar artery.

The elevation of a forearm flap based on the ulnar artery has been described as an alternative to a flap based on the radial artery. Despite the fact that 15-30% of operated patients complain of symptoms in the hand due to impaired circulation, this flap is still regularly raised upon the radial artery. Using Doppler ultrasonographic examination before elevating the forearm flap, the dominant artery to the hand can be determined. The preliminary experience in 11 patients operated upon (the flap has been based upon the ulnar artery five times) is satisfactory. None complained of weakness of the hand, a feeling of coldness or cold intolerance.

Adult↗

3D-ultrasound at the arterial and venous system.

We report upon a new method of vascular ultrasound which allows a three dimensional imaging. With serial sector images it is possible to get vertical pictures nearly parallel (max 60 in sequence). After transformation, a workstation calculates the third dimension parallel to the surface of the body in addition to the known 2 dimensions. The result is a sort of sculpture rotating around 360 degrees which allows to take a look at the region of interest from diverse angles. Up to now we got informations on the morphology of arterial plaques which can be divided into two main groups: a) prominent plaques like branches of a tree or like humps, b) plane excavated alterations of the vessel wall (exulcerations). At the venous system we did examinations on thrombosis. First acknowledges allow thrombi along a foreign body (catheter) increase in layers while thrombi caused by stagnation show a more heterogenous structure.

Arteries↗

[Locoregional thrombolytic therapy of deep venous thromboses].

With the repeated regional application of 20 mg rt-PA distally with a deep venous thrombosis, successful fibrinolysis is possible. Best results have been achieved in single location thrombosis. Extended thrombotic occlusions of calf, popliteal, thigh and pelvic veins could be recanalized in a lower percentage. The basic precondition is a compression of the subcutaneous veins of the extremity with bandages to minimize the collateral blood flow and to force the fibrinolytic agent near the thrombosis. Bleeding complications and other side effects in the 162 patients treated up to now are lower compared with systemic application of fibrinolytic therapy.

Adult↗

[Ambulatory prevention of thrombosis with low molecular weight heparin in plaster immobilization of the lower extremity].

Plaster cast immobilisation following trauma is a major risk factor for the development of deep vein thrombosis. In our controlled, randomized and prospective study on patients with minor injuries incidence of DVT in conservatively treated out-patients with plaster cast immobilisation of the leg was 3.9% in the control group (n = 126) without prophylaxis. By s.c. self-application of LMV heparin once daily the number of DVT in the prophylaxis group (n = 115) was reduced to 0. No severe side effects of NMH were observed. We conclude that thromboprophylaxis with LMW heparin once daily up to now conspiciously reduced the risk of DVT in outpatients with plaster cast immobilisation of the leg.

Adolescent↗

Formation of 13,14-dihydro-prostaglandin E1 during intravenous infusions of prostaglandin E1 in patients with peripheral arterial occlusive disease.

Formation of 13,14-dihydro-prostaglandin (PG) E1 during intravenous infusions of PGE1 in patients with peripheral arterial occlusive disease was investigated. Using both high performance liquid chromatography (h.p.l.c.) combined with radioimmunoassay and gas chromatography/triple stage quadrupole mass spectrometry (GC/MS/MS) basal levels of 13,14-dihydro-PGE1 were found to be close to or below the detection limits of the assay methods. Levels of the PGE1 metabolite increased significantly during the infusion periods and decreased after their end. Since 13,14-dihydro-PGE1, in contrast to its precursors 15-keto-PGE1 and 15-keto-13,14-dihydro-PGE1, is biologically active, its formation could contribute to the beneficial effects of PGE1 administered intravenously in patients with peripheral arterial occlusive disease.

Alprostadil↗