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Biomedical subjects

M Voigt

Publications and source records attributed to M Voigt.

121 records · Page 7Linked to original sources
PubMed1976

[Effect of social factors on the relations between working mother and premature birth rate].

Basing on the results of a study of 6780 women we found already at the beginning of the 1970 years in the GDR a premature birth rate for occupied women not more unfavourable than for house-wives; the total rate by then was 5,9%. The present paper deals with the influence of certain social factors--e. g. educational and social status, personal status, number of children within a family - on the frequency of premature births for occupied women and house-wives.

Adult↗
PubMed1975

[Relationship between premature labor and maternal age, as well as between premature labor and parity].

Various publications of the last years and own studies, too demonstrate that birth rank and maternal age, as well, in each case independently influence the risk of prematurity. The rate of prematurity for primiparous and multiparous women is above the average; it is just the same for very young and comparatively old women. Basing on a review of literature eventual causes are briefly discussed.

Female↗
PubMedDate not supplied

Effect of ultrasonic assisted lipectomy (UAL) on breast tissue: histological findings.

As the use of ultrasound-assisted liposuction (UAL) increases, the technique grows more popular in breast surgery, especially in reduction mammaplasty and treatment of gynecomastia. The aim of our study was to investigate the effect of UAL on breast tissue using histological examinations, and analyze the effect of this technique on a cellular level. Biopsies from 10 patients undergoing ultrasonically assisted lipectomy prior to classic reduction mammaplasty were taken from the treated areas of the breast. Biopsies were fixed in formalin and embedded in paraffin. Sections were stained with hematoxilin-eosin, and analyzed for defective adipocytes, and the effects of UAL on breast tissue. Untreated breast tissue and breast tissue that had been treated only with conventional aspiration lipectomy served as controls. Sections were analyzed using light microscopy. Compared to the breast tissue treated only with conventional lipectomy, a stronger destruction of the cellular structure of adipocytes could be detected. The destruction was visible even in areas more distant from the aspiration channel. In contrast, the breast tissue was mostly intact, no signs of ultrasonic-induced cellular destruction were visible. The glandular structure was kept intact. Beside the direct mechanical destruction by the probe and the canula, no further alterations of the cellular integrity of the glandular parts were visible. In conclusion our results indicates that UAL is also a safe technique for use in breast surgery. Besides easy handling and improved modelling, the destructive effect of the ultrasound does not include the glandular breast tissue.

Breast↗
PubMedDate not supplied

Characterization of aminosaccharins in commercial sodium saccharin produced by the Maumee process.

The most abundant polar impurities detected by ion-pair high-pressure liquid chromatography of sodium saccharin produced by the Maumee process were identified as 5- and 6-aminosaccharin. The combined levels of these compounds in the samples analysed ranged from 99 to 152 mg/kg. Other less abundant polar impurities identified in Maumee process sodium saccharin were 7-aminosaccharin and o-sulphamoylbenzoic acid. Mutagenicity assays of 5-aminosaccharin, 6-aminosaccharin and a polar impurity fraction isolated from Maumee saccharin, gave negative results.

Chromatography, High Pressure Liquid↗
PubMedDate not supplied

[Synovectomy of the knee joint and postoperative exercise treatment in peridural anesthesia and analgesia].

The operative treatment of synovialitides of the knee-joint requires apart from an exact operative technique an effective postoperative therapy. The painless postoperative gymnastik treatment is an important factor to achieve a satisfactory result of therapy. The exercise of this "wounded articulation" by the "Frankfurter-mowing splint" needs sufficient analgesie for a long period which will be attained through our experience under continuous epidural anaesthesia and analgesia.

Anesthesia, Epidural↗
PubMedDate not supplied

Development and evaluation of a two-dimensional electrocutaneous cognitive feedback system for use in paraplegic standing.

Fatigue of electrically activated paralysed muscles is a major factor limiting the duration of functional electrical stimulation (FES) supported paraplegic standing. Fatigue can be significantly delayed by changing the posture. Since paralysed individuals are deprived of proprio- and exteroception from the lower limbs they are not aware of the posture and loading of their paralysed legs. If suitable cognitive feedback (CF) information about posture in the sagittal and frontal planes is provided, they might be able to successfully exercise posture switching. A two-dimensional electrocutaneous CF system was developed. Relative limb loading and the location of the weighted centre of pressure were selected as informational variables. Discrete encoding schemes in the form of spatial and frequency codes were employed and the informational signals were divided into three sub-regions. The ability to correctly interpret the CF was investigated using one- and two-dimension tracking tests in three paralysed subjects, each of whom were studied over five consecutive days. All three subjects were able to use the CF in one-dimension tests. Two subjects could do the same also in two-dimension tests. The encoding scheme which was developed to communicate the selected biomechanical variables proved to be easily understood and thus appropriate for use in paraplegic standing.

Adult↗
PubMedDate not supplied

Ankle inversion injuries. The role of the dynamic defense mechanism.

We investigated the role of a muscular defense in the stabilization and protection of the ankle joint against sudden forced inversion. Ten volunteers with mechanically stable ankles were tested in different standing and walking situations using a trap door model and lower extremity electromyography and electrogoniometers. Peroneal electromyographic activity was observed 54 msec after the detection of ankle inversion. This latency was shorter when the ankle was already in inversion and longer with the ankle in eversion. Quadriceps and hamstring muscle electromyographic activity occurred 68 msec after the ankle inversion stimulus. Evidence of active eversion was seen 176 msec after sudden inversion. Active changes in knee and hip joint angles occurred even later. In contrast, the trap door rotated 30 degrees in approximately 80 msec. We conclude that the reflex reaction to sudden inversion is initiated at a peripheral level by the inversion motion followed by a reaction pattern mediated by spinal or cortical motor centers. Both peripheral and central reactions, however, seem too slow to protect the ankle in case of sudden inversion occurring at the time of heel contact.

Adult↗