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Biomedical subjects

R Mayrhofer

Publications and source records attributed to R Mayrhofer.

6 recordsLinked to original sources
PubMed2001

MR imaging of the knee in marathon runners before and after competition.

OBJECTIVE: To evaluate the findings in MRI-studies of the knee in recreational long-distance runners after competition and to assess the reversibility of the findings. DESIGN AND PATIENTS: Eight recreational long-distance runners underwent MRI studies of the knee before, immediately after and 6-8 weeks after taking part in the Vienna City Marathon. The studies were evaluated regarding alterations of pre-existing lesions and new pathological findings. RESULTS: In six runners without major pre-existing alterations no negative effects were experienced. In one runner with pre-existing grade III alterations of the menisci, signs of progressive osteoarthritis were experienced 2 months after the competition. In all other cases increased meniscal signal alterations and minor signal changes in the bone marrow after the race were transitory. CONCLUSION: In healthy individuals no negative long-term-effects were experienced. Pre-existing high-grade lesions of the menisci might be a predisposing risk for osteoarthritis, triggered by the stress of long-distance running.

Adult↗
PubMed1999

[Endovascular brachytherapy for the prevention of recurrence after PTA].

PURPOSE: Recurrent stenosis after PTA is caused by intimal hyperplasia and constrictive arterial remodeling. In experimental and first clinical studies, ionizing radiation has demonstrated its potential to control excessive intimal proliferation. We wanted to evaluate the safety, feasibility and efficacy of endoluminal irradiation after PTA and/or stent implantation. MATERIAL AND METHODS: From September 1996, 24 patients (24 lesions) who had a stenosis or occlusion measuring more than 5 cm in length in the superficial femoral artery or a restenosis after PTA underwent endoluminal irradiation. An isodose of 14 Gy was applied to the vessel wall using an Ir-192-HDR afterloading unit. The radiation was tolerated well; the additional time needed for the procedure was 30-45 min. RESULTS: In a mean follow-up time of 15 months we found a cumulative patency rate of 60%. No side effects were observed. CONCLUSION: Endovascular brachytherapy is a safe and brief procedure. In our selection of patients, a patency rate of approx. 40% after 1 year has to be expected. Thus, these first results are promising, although first published studies of endoluminal irradiation in peripheral vessels with stent implantation showed higher patency rates. No randomized data are currently available. We conclude that endovascular irradiation should be performed together with stent implantation in long lesions or recurrent stenosis after PTA, in order to control not only excessive intimal proliferation but also constrictive arterial remodeling.

Angioplasty, Balloon↗
PubMed1994

[Clinical experiences with PACS: digital radiology].

We present our experience during the first 21 months of using hospital-wide network technology and digital archiving in connection with digital radiology in the Radiology Department at the SMZO/Danube hospital in Vienna. This means digital generation, archiving and distribution of radiographs as well as monitor reporting embedded in HIS and RIS. The clinical use of PACS demands full integration of all subsystems and modalities in a digital way, as was first realized at the Danube Hospital. With this approach, a reduction in radiation dose, improved communication and thus a reduction in the length of hospital stay and health care cost are attained.

Austria↗