PubMed Health⌕ Search

Biomedical subjects

M Stöhr

Publications and source records attributed to M Stöhr.

At least 127 records · Page 7Linked to original sources
PubMed1975

[Myopathia myotonica. A new type of hereditary muscle disease (author's transl)].

A new type of hereditary muscle disease, characterized by weakness and painful spasms during effort, without electrical activity in the shortened muscles, is described. These phenomena are limited principally to the upper limbs. In addition we found electromyographical signs of a generalized myotonic syndrome. The histological and histochemical investigations reveal only minimal non-specific signs of myopathy. The activities of CPK and aldolase in the blood serum are increased at times. A normal elevation of venous lactate was observed during ischemic work. The biochemical studies of muscular tissue exhibit normal activities of the analyzed enzymes, especially as regards phosphorylase. An increased concentration of calcium ions in blood serum may be related to the contraction during strenuous work; it is known that calcium ions are an important factor in the contraction-relaxation cycle of striated muscle. The age of manifestation varied from 4 to 33 years in 4 cases of the relatives observed. The disease shows no signs of aggravation as to the severity and extent of the disorders. The nature of the underlying metabolic defect is still unknown.

Adult↗
PubMed1975

[Nerve lesions following total hip replacement and other hip-joint operations].

Nerve lesions occurred in 17 patients who had undergone hip-joint operations (especially total replacement). The femoral nerve was most commonly affected, followed by sciatic and gluteal nerves, with combined pareses in six. As differential diagnosis from pseudoparesis is not always possible, electromyography should be performed in all cases. Stretching and/or squeezing are the most important causes. The operation results are significantly impaired by such nerve lesions. However, long-term results are usually satisfactory in the majority of cases. Early diagnosis and treatment are important in ensuring good therapeutic results.

Adult↗
PubMed1975

[Automated cytofluorometry of solid malignant tumors after cell dispersal by means of intraperitoneal cultivation of cell complexes in young rats (author's transl)].

UNLABELLED: The use of isolated cells is a basic requirement besides data processing techniques to obtain optimum results with the automated flow cytofluorometry. Several techniques have been employed in order to get cell dispersal. But the claim for reproducible and representative cell samples cannot exactly be fulfilled: gross parts of cells are damaged by any dispersal method applied on solid tissues. Therefore we want to introduce a special method for cell isolation, which avoids mechanical and chemical damage of the treated cells. For this the intraperitoneal tolerance of growing tumor cells in young animals was used, in the species of which solid growth of such tumor cells is established. The investigations reported here were carried out with the Walker-tumor 256 on the rat as a model for solid tumor growth. Our interest was focused on the determination of cellular CNA distribution in tumor cells and contaminating somatic cells grown in the ascitic fluids. MATERIAL AND METHODS: Walker-tumors are permanently cultivated on Sprague-Dawley rats. The solid tumors (1 cm diameter) were removed under sterile conditions, cut with scissors, and resuspended in 0.9% saline. Ten rats (37 days old, body weight 90-120 g) had received an intraperitoneal injection of 1 ml Liquemin (5000 Roche). One million tumor cells could be obtained by such a procedure. After spontaneous sedimentation of cells in order to reduce the number of erythrocytes, the cells were processed and fixed according to Trujillo and Van Dilla (1972), digested with heated RNase (1 mg/ml tris-buffer; 0.18 M and pH 7.5), pepsin treated, and then stained with ethidium bromide (40 mug/ml tris-buffer) for 30 min in the cold. After rinsing with distilled water several times the cells were resuspended in buffer and measured within an hour immediately after passing a 10 mum filter to avoid cell aggregates...

Animals↗
PubMed1975

[Peripheral nerve injury due to total replacement of the hip-joint (author's transl)].

Report on peripheral nerve lesions due to total replacement of the hip-joint based on the literature and the authors' own experience. In 15 patients our diagnosis was made on clinical and electromyographic evidence. 16 endoprostheses had been inserted. The femoral nerve was involved on 12 occasions, the sciatic in 5, the glutei in 5, the obturator in 2, the lateral cutaneous femoris in 2 and the posterior cutaneous in 1 instances. One has to count on about 1% of such lesions. This type of paresis has to be distingushed from pseudopareses for which electromyography was proved very effective. Damage due to overstretching is probably the main cause. Treatment with thorough physiotherapy and faradic stimulation is needed. When this is done the prognosis is generally favourable. In some cases, however, these complications may limit the success of the operation and postoperative disability may be worse than before.

Aged↗
PubMedDate not supplied

Supernormal excitability of human sensory fibers after ischemia.

Weak electrical stimuli were applied to sensory fibers of the median nerve at the wrist, and the ascending action potentials were recorded at the elbow. This was done with or without a preceding conditioning stimulus to test for supernormal excitability to the second stimulus. In the resting nerve, supernormal excitability was present from 3 to 20 msec after a conditioning shock. After a period of ischemia, excitability was both exaggerated and prolonged. This observations confirms the presence in sensory fibers of a phenomenon previously described in motor fibers.

Action Potentials↗