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Biomedical subjects

E Benassayag

Publications and source records attributed to E Benassayag.

At least 19 recordsLinked to original sources
PubMed1991

[Long ureteral ammonium-magnesium phosphate (struvite) and calcium phospho-carbonate calculi].

The authors report about 12 cases of long ureteral calculi, 16 to 39 mm in size, observed over 10 years. They were all made of a mixture of ammonium-magnesium phosphate and calcium phosphocarbonate. Infection was the revealing symptom, either in the form of simple bacteriuria or as acute pyelonephritis or sepsis. These calculi, found in a lumbar or pelvic location, were very long, radiopaque but with a moderate radiological density, homogeneous and have regular contours. They were straight, sometimes slightly bent, rarely (one case out of 12) arciform. In 11 of 12 cases, the affected patient was female. In most cases, the urine was infected by Proteus mirabilis. In spite of their size, the calculi caused total obstruction in 3 of 12 cases only. They were or were not associated to ipsilateral coral calculi of the same chemical type. Destruction was easily achieved with physical agents. The etiological, radiological and therapeutic characteristics of these calculi give them a specific place among ammonium-magnesium phosphate calculi.

Adult↗
PubMed1991

[A technical stratagem to facilitate the cure of hydronephrosis].

The surgical cure of hydronephrosis must consist in the resection of the pyeloureteral junction, associated to a pyelic resection leaving an undistended renal pelvis. This article describes a few technical tricks that make the procedure easier and thus allow obtaining results. After proving its value for twenty years, this technique gives just as much satisfaction today.

Anastomosis, Surgical↗
PubMed1989

[A case of a large pyelic calculus composed only of ammonium urate].

The authors report a case of pure ammonium urate stone. It was a very large lightly radiopaque pelvic stone, which was extracted by pyelotomy and analysed by infra-red spectrography. The clinical history did not reveal a long history of chronic infections. The stone was diagnosed by urography performed after an acute urinary trad infection. Proteus mirabilis was found at one time, but only after the surgical operation. The blood and urinary laboratory check-up was normal. No case of such a large pure ammonium urate stone especially in adults, can be found in the literature. The pathogenesis is not obvious, and could not be explained without an abnormal urinary ammonia production during the development of the stone, but the lack of associated phosphate precipitation cannot be explained.

Adult↗