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21.
Anal sphincter size measured by endosonography in healthy volunteers. Effect of age, sex, and parity. 总被引:8,自引:0,他引:8
M B Nielsen C Hauge O O Rasmussen M S?rensen J F Pedersen J Christiansen 《Acta radiologica (Stockholm, Sweden : 1987)》1992,33(5):453-456
The anal sphincter muscles consist of the circular internal and external sphincters together with the sling-shaped associated puborectalis muscle. Ten men, 10 women with no vaginal deliveries, and 10 women with one or more vaginal deliveries were studied with anal endosonography using a 7 MHz multiplanar endoprobe. The thickness of the internal sphincter and the thickness, length, and cross-sectional area of the external sphincter were measured and related to age, sex, and parity. Reproducibility was assessed by similar measurements on different days in 10 volunteers. Anal sphincter size was the same in men and women and was not affected by the number of child births. Internal sphincter muscle thickness increased with age. Anal manometry and electromyography with an anal sponge were performed in all volunteers but the results did not correlate to any of the anal sphincter dimensions. Our conclusion is that although there are some limitations, endosonography can be used to determine the size of the anal sphincter muscles. 相似文献
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23.
Congenital malformations among children of women working with video display terminals 总被引:1,自引:0,他引:1
In a case-base study among 214,108 commercial and clerical employees in Denmark the potential effect of the use of video display terminals on the risk of congenital malformations in pregnancy was investigated. The study base was identified by means of register linkage of the Medical Birth Register and the National Register of In-Patients. In the source population 24,352 pregnancy outcomes were registered, 661 of which with congenital malformations entered the case group, and a base sample of 2252 pregnancies was drawn. Data concerning the use of video display terminals, job stress, ergonomic factors, exposure to organic solvents, and life-style factors were obtained from postal questionnaires. The results of this study did not support the hypothesis that the use of video display terminals during pregnancy is associated with an increased risk of congenital malformations. 相似文献
24.
The effect of angiotensin-II (A-II) was studied on ring segments of the terminal extraocular branches of the posterior ciliary artery isolated from human enucleated eyes. It induced a potent concentration-dependent contraction on top of the spontaneous myogenic tone of all arteries studied from five patients with the concentration required to give half-maximal response equal to 51 nM. The spontaneous tone and maximal increase in vessel wall tension induced by A-II was equal to 51% of Emax. The relative response and sensitivity to A-II was unchanged in three endothelial denuded vessels, but the spontaneous tone increased. The arteries became completely insensitive to A-II after one exposure. These results show an immediate direct contractile effect of A-II on human posterior ciliary arteries, but the development of pronounced tachyphylaxis indicates that A-II is probably not an important factor in reducing blood flow to the optic nerve head. 相似文献
25.
Golli M; Van Nhieu JT; Mathieu D; Zafrani ES; Cherqui D; Dhumeaux D; Vasile N; Rahmouni A 《Radiology》1994,190(3):741
26.
27.
Molecular identification of a small supernumerary marker chromosome by in situ hybridization: diagnosis of an isochromosome 18p with probe L1.84 总被引:1,自引:0,他引:1
A dysmorphic child was found by cytogenetic analysis to have an extra small marker chromosome. The marker chromosome was shown to possess a chromosome 18 centromere by in situ hybridization, and probably represents an isochromosome 18p. Centromere specific probes should be of value in identifying extra small marker chromosomes, and thereby provide better understanding of the clinical significance of these. 相似文献
28.
29.
Dr. Flemming Moesgaard M.D. Mogens Lykkegaard Nielsen M.D. Ph.D. Allan Hjortrup M.D. Peter Kjersgaard M.D. Carsten Sørensen M.D. Peter Nørgaard Larsen M.D. Steen Hoffmann M.D. 《Diseases of the colon and rectum》1989,32(1):36-38
One hundred ninety patients with peritonitis at the time of abdominal surgery were allocated at random to systemic antibiotic
treatment alone or systemic antibiotic treatment combined with topical application of antibiotics in the wound at the time
of wound closure. The overall wound infection rate was 17 percent without significant difference between the two treatment
groups (P>0.80). 相似文献
30.
A Andreasen A M Drewes J E Assentoft N E Larsen H Nielsen I E Holm F A Geneser 《Journal of neuroscience methods》1991,37(2):151-160
A large series of rabbit hippocampal Neo-Timm stained sections were manually aligned, digitized, and by a modified median filtration noise reduced and reconstructed into a three-dimensional object. From the presented simulated grey tone cuts of this object, the reader may assemble a rabbit hippocampal model, that spatially illustrates its anatomy. 相似文献