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Biomedical subjects

D Franz

Publications and source records attributed to D Franz.

24 records · Page 2Linked to original sources
PubMed1993

Open mouth posture and cross-sectional nasal area in young children.

A biracial sample of two-hundred ninety-six children were assessed for open-mouth posture (OMP) in the natural environment. In addition, rhinometry was performed on 288 of the youngsters. Means were computed for percent OMP and cross-sectional nasal airway. Results indicated that in general these children exhibited relatively high rates of OMP. Boys displayed significantly greater OMP than girls. However, children exhibiting OMP on 80% of the observation intervals had significantly smaller cross-sectional nasal areas than the youngsters who displayed OMP on fewer than 20% of observation intervals. The implications of the findings were discussed.

Analysis of Variance↗
PubMed1976

The endothelial surface of growing coronary collateral arteries. Intimal margination and diapedesis of monocytes. A combined SEM and TEM study.

Slowly progressing coronary artery stenosis leading to complete occlusion within about 3 weeks was produced in dogs. Within this time collateral vessels had enlarged sufficiently to prevent myocardial infarction. Early, intermediate, and late (1 year after occlusion) stages of collateral development were studied with the scanning and transmission electron microscope. Early after coronary occlusion the number of endothelial cells per unit inner vascular surface had markedly increased and longitudinal bulges appeared in growing collaterals as opposed to the completely flat inner surface of small normal coronary arteries. The surface of many endothelial cells appeared rough and large numbers of monocytes adhered to the inner vascular surface. The endothelial cells formed three types of patterns: streams, whorls, and nonoriented mosaics suggesting different types of flow-jets, eddies, and lowshear flow, respectively. The existence of nonlaminar flow patterns could well be explained by the extremely tortuous course of collaterals and by segmental caliber changes (microstenoses) resulting from irregularities of the internal elastic lamina. Later stages showed a tendency toward normal endothelial cell density, flattening of bulges, and absence of microstenoses. A completely normal inner surface was, however, never observed in midzone segments although the observation period extended up to 1 year after coronary occlusion.

Animals↗
PubMedDate not supplied

[Suggestions for implementation of DRG in the fields of Orthopaedics and Trauma Surgery for 2004].

OBJECTIVE: The Implementation of a DRG-Variant in Germany - voluntarily since January 1 st, 2003 and obligatory from January 1 st, 2004 - has been leading to uncertainty, particularly in the hospitals, due to fears that currently practised German diagnostic and therapeutic measures will not be financed properly by a DRG-Variant. The G-DRG-Version 1.0 that was drawn up in connection with an executive order law is to a large degree identical to the Australian AR-DRG-Version 4.1. Adjustments to German requirements were made only marginally. Therefore it is necessary for every medical field to investigate by stock-taking to what extent currently practised German diagnostic and therapeutic measures are considered in the G-DRG-Version 1.0 and whether and where modifications and adaptations need to be made. In order to make qualified statements scientific evaluations of possible problems have to be made based German data. Therefore an evaluation was made of the mapping of the medical fields of orthopaedics and trauma surgery. The German Society of Trauma Surgery (DGU), the German Society of Orthopaedy and Orthopaedic Surgery (DGOOC) in cooperation with the DRG-Research-Group of the University Hospital Muenster, the German Hospital Federation (DKG) and the German Medical Association carried out a DRG evaluation project in order to investigate the medical and economical homogeneity of the case groups. METHOD: 12,645 orthopaedic and trauma surgery cases from 23 hospitals - 11 university hospitals and 12 non-university hospitals - were collected within an period of three months and were scientifically evaluated with regard to their performance homogeneity and length of stay homogeneity. RESULTS: The data formed the basis for the proof of suspected deficiencies of mapping of orthopaedic and trauma surgery cases within the G-DRG-Variant. Based on the data and additionally on conclusions of medical experts when the number of cases were small, 14 suggestions for adaptation were proposed and submitted by the deadline of March 31 st, 2003 to the InEK. CONCLUSION: The results of the DRG-Evaluation Project demonstrate the problems of mapping the very heterogenous and complex medical performances of orthopaedy and trauma surgery to a flat rate financing system that is not adapted properly to German conditions. The G-DRG-Variant Version 1.0 does not offer the sufficient possibilities of differentiation that are needed to map the various orthopaedical and trauma surgical measures in Germany.

Cost-Benefit Analysis↗