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Query: UMLS:C0403608 (ureter)
 9,655 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Parathyroid hormone (PTH) has been shown to decrease blood pressure in several animal species and to increase blood flow in different vascular beds. The aim of this work was to characterize and quantify the renal vasodilator effect of PTH on the isolated perfused kidney of the rat. The rat kidney was isolated and perfused in a closed circuit with a modified Krebs-Henseleit solution under non filtering conditions (BSA 10 g/100 ml, ligature of the ureter and perfusion pressure set on 70 mmHg). These conditions have been shown to avoid both glomerular filtration and PTH degradation. Vascular tone of the isolated kidney was restored by a continuous perfusion of prostaglandin F2 alpha (2 x 10(-8) mol/mn). The vasodilator responses to PTH were expressed as a percentage of the relaxation induced on each kidney preparation by 4.4 x 10(-4) M papaverine. PTH fragments [bovine PTH (1-34), NLe8.18Tyr34bPTH (1-34) amide and rat PTH (1-34)] induced concentration-dependent renal vasodilation. When tested at increasing cumulative concentrations, EC50 values ranged from 1 to 2 nM for all PTH fragments; maximal relaxation was obtained at 10(-8) M and only approached 40 p. 100 of the response induced by papaverine. Moreover, at concentrations higher than 10(-8) M, all three peptides induced lower vasodilator responses. Neither indomethacin nor phentolamine modified rPTH (1-34) induced renal response. When rPTH (1-34) was tested as a single concentration on each kidney preparation, a higher maximal response (60 p. 100 relaxation) was obtained. This suggested tachyphylaxis of the renal vasculature to repeated PTH administration.(ABSTRACT TRUNCATED AT 250 WORDS)
Arch Mal Coeur Vaiss 1989 Jul
PMID:[Renal vasodilator effect of parathormone]. 251 Jun 51

Four cases of anomalies of the inferior vena cava (IVC) were studied by two noninvasive imaging techniques: real-time ultrasonography and computed tomography. These techniques were used alone in 1 case of left IVC to determine the diagnosis. The other 3 cases were studied initially by phlebography: left IVC with iliac phlebitis; double IVC, also with iliac phlebitis, and a special case in which it was not clear whether the diagnosis was agenesis of the IVC or postnatal caval thrombosis. The two patients with recent iliac vein thrombosis were treated by heparin, but the other two received no particular therapy. Concerning these 4 cases, the authors speak of the known complexity of embryogenesis of the IVC which accounts for the great diversity in its anomalies. Left and double IVC are among the most frequent anomalies along with periaortic venous rings and the ureter behind the IVC. These anomalies are most often asymptomatic, but an understanding of them is essential for correct interpretation of the results of different imaging techniques and for effective performance of surgical and medical acts concerning the IVC directly or indirectly. For diagnosis of IVC anomalies, iliac venacavography, when not performed initially, can in certain cases be replaced by routine noninvasive imaging techniques, to which may now be added magnetic resonance imaging.
J Mal Vasc 1989
PMID:[Clinical and paraclinical identification by various imaging technics of congenital anomalies of the inferior vena cava (apropos of 4 cases)]. 267 13

Gonococcal arthritis, a rare complication of gonorrhoea, more frequent in women, causes polyarthritis in 75% of cases or monoarthritis. An erythematous skin rash or acute pustular rash (40%), recent signs of genital infection (75% of cases in man, less than 50% in women) suggest the diagnosis. The gonococcal nature of the arthritis is confirmed by isolation of the germ in the joint fluid, the blood and the skin biopsies. In about half the cases, these bacteriological investigations are negative, but the diagnosis remains very probable if the germ is isolated from one or other of the primary foci of the infection: ureter, cervix, vagina, rectum and even pharynx. The rapidly favourable course under antibiotic treatment with penicillin or ampicillin confirms the diagnosis. The pathogenesis of arthritis is a direct toxic action of the gonococcus on the synovial membrane and the periarticular structures. The role of circulating immune complexes recently demonstrated in gonococcemia is probably not relevant.
Rev Rhum Mal Osteoartic 1981 Feb
PMID:[Gonococcal arthritis]. 722 40

Situations which can be considered at risk for infective endocarditis are those causing a bacteremia, which is necessary for the development of an endocarditis. Such situations can be identified by clinical studies evaluating the rate at which a bacteremia occurs after some procedures or because of lesions, then the risk of endocarditis after such a bacteremia. Without considering preexisting cardiac lesion and age, some situations seem to be at risk of subsequent endocarditis: acute bacterial infection for which antibiotherapy is necessary; procedures involving the mouth with the exception of superficial caries and bloodless supragingival prosthetic preparations; oesophageal dilatation, laser endo-oesophageal procedures, sclerosis of oesophageal varices; colonoscopy and sigmoidoscopy for cancer lesions, gastrointestinal procedures on a potentially infected gastrointestinal tract (cholecystectomy, colectomy...); tonsillectomy and adenoidectomy; naso-tracheal intubation; instrumental procedures involving the ureter or kidney, and prostatic or urinary tract biopsies and surgery; procedures performed on infected skin. In cardiac patients at high risk, in addition to the above retrograde cholangiography, colonoscopy and rectosigmoidoscopy, lithotripsy. In these situations the risk of endocarditis is probably linked to the rate of bacteremia, the size of inoculum, and the bacteria, compared with spontaneous bacteremia without any procedure, where the inoculum is low and bacteria is considered as non pathogenic. A prophylaxis has to be discussed in such situations, which are probably involved in less than 10% of endocarditis.
Arch Mal Coeur Vaiss 1993 Dec
PMID:[Situations and procedures with risk of bacterial endocarditis (intracardiac surgery excluded)]. 802 96

For more than 20 years it has been generally acknowledged that operation for inflammatory abdominal aortic aneurysm (IAAA) using the common in-lay-graft procedure will induce the regression of peri-aortic fibrosis. However in prospective studies, after a 2 years follow-up, no regression appeared in approximated 8% of the cases (table I). Moreover in some IAAA a corticosteroid treatment (CS) was prescribed and it produced a regression of fibrosis and therefore facilitated the operation. Nevertheless the usefulness of the CS remains debated. We report 4 new cases of IAAA with CS. Based on our cases and an analysis of the literature we conclude that when there is no urgency to operate (diameter inferior to 50 mm) CS is the best option in IAAA with either severe inflammation or ureter involvement. Due to the regression of the fibrosis it can facilitate the surgical procedure. However it needs to be conducted with an adequate dose and duration. Finally the CS is the only possibility when the inflammation persist following the treatment of the IAAA.
J Mal Vasc 2000 Jun
PMID:[Inflammatory abdominal aortic aneurysm. Role of corticosteroid therapy]. 1090 35

The malignant tumors of the inferior vena cava are rare. Their prognosis is bad. We report two cases of a 17-year-old and 46-year-old woman presenting the one an intimal sarcoma of the inferior vena cava and the other a metastatic of adenocarcinoma whose primary tumor was not identified. The aortic wall was invaded in both patients. The ureter repulsed in first case, was invaded in second case. The treatment consisted on resection of the tumor including the aortic wall with vein closure in both patients, with right nephrectomy in second patient. In the two cases, a prosthetic reconstruction of the arterial integrity was attempted with aortobiiliac bypass. The two patients died after relapse tumorous to the 6th month in first patient and by multisystem organ failure 5th day post-operative in second. Through these two personal cases, we try to point out the difficult problem of diagnosis that put these tumors and their bad prognosis despite an improvement of treatment.
Arch Mal Coeur Vaiss 2004 Apr
PMID:[Two cases of malignant tumors of the inferior vena cava]. 1518 80