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Biomedical subjects

M Petzold

Publications and source records attributed to M Petzold.

7 recordsLinked to original sources
PubMed1990

[Use of computer-assisted Doppler sonography and rheography in acral vascular diagnosis in progressive systemic sclerosis].

For the quantitative characterization of the blood flow of patients with progressive systemic sclerosis a combined computer-assisted Doppler sonographic as well as rheographic measuring place was established. An aimed examination of the peripheral situation of the blood supply was performed in 15 patients with progressive systemic sclerosis in comparison to a control group of patients with healthy vessels. The demonstration of the corresponding parameters of time and form of the curves resulted in significant differences for the two examination groups, particularly of the pulsation index (PI) and the index of the peripheral resistance (PWI) in the Doppler flow curves as well as for the maximum increase (A) and the peak time (GZ) in the rheogrammes. The computer-assisted functional-diagnostic investigation methods in the peripheral vascular region offer themselves for the objectivation and the assessment of the course of the participation of the vessels in the collagenoses.

Blood Flow Velocity↗
PubMed1990

[The vitamin A supply of laying hens including during rearing. 2. Effect of varied vitamin A supplementation of mixed feed in rearing on production in the laying period].

In six experiments with laying hybrids the influence of a varied nutritive beta-carotene and vitamin A supply during rearing on the performance in the laying period was tested. Basal rations poor in carotene without vitamin A supplementation in the rearing period diminished feed intake and laying performance in the laying period, retarded the beginning of intensive laying and increased feed expenditure per 100 g egg if the feed for laying hens contained less than 5000 IU vitamin A per kg. Relations between varied vitamin A supply and the performance parameters of the laying performance could not be proved if chick and young hen feed with maize even without vitamin A supplement or if rearing feed with approximately 2500 IU vitamin A or laying hen feed greater than 5000 IU vitamin A supply were used.

Analysis of Variance↗
PubMed1990

[Difficulty in determining ultrasonic attenuation values from selective echograms].

The value of tomography is beyond all doubt. Custom systems allow the quantitative assessment of topographic and kinetic parameters of various organs and the blood. The assessment of tissue, however, is still qualitative and experimental methods for quantitative tissue characteristics are still expensive. We propose a method, that allows the determination of attenuation coefficients with little technical expense.

Humans↗
PubMed1989

[Ultrasound-controlled fine-needle puncture with a specially prepared puncture needle].

The described puncture needle with dual amplified point has been successfully applied at the Medical Clinic of the County Hospital Halle for more than half a year now. Better reflecting capacity in both vitro and vivo results from preparation of the needle point's surface. The more clear visibility of the needle point in the ultrasonic sectional view results in a better display during the whole process of puncture and makes possible a better locating also under difficult sonographic conditions. By the application of the described puncture needle the safety of the ultrasonic directed fine-needle puncture increases for both patient and examiner.

Biopsy, Needle↗
PubMed1977

[Requirements of Muscovy ducks (Cairina moschata domestica) for crude protein and energy levels of fattening diets].

Groups of male and female Cairina ducks subjected to equal starter feeding (1st to 3rd weeks) were used from the 4th week of live (fattening period) to test feed mixes of varying energy and crude protein levels (480 energetic feed equivalents/heu[EFH] - 140 g crude protein[CP]; 480 EFh - 180/g CP; 555 EFh - 140 g CP; 555 EFh - 180 g CP; 625 EEh - 140 g CP; 625 EFh - 180 g CP - all figures referred to 1 kg of feed). The different energy levels remained without influence of the live weight development. High-energy feed caused, however, higher expenditures of energetic feed equivalents per kg of gain and resulted in carcases with higher fat proportion. At all the 3 energy levels under study, high-protein feeding proved superior to low-protein rations with regard to live weight gains and meat yield. For the time being, 500 EFh and 180 g CP per kg of organic matter are recommended as indicators for Cairina duck fattening rations.

Animal Feed↗