Biomedical subjects

J Benítez Navio

Publications and source records attributed to J Benítez Navio.

4 recordsLinked to original sources

PubMed2000

[Urodynamics rationale. The flow curve].

OBJECTIVE: To describe the mathematical representation of a common phenomenon: the urinary flow curve. METHODS: The statistical adjustment for minimum squares was the method employed in the study. RESULTS: A mathematical expression was obtained with a goodness of fit for each flow curve and an acceptable margin of error. CONCLUSIONS: The model which considers the flow curve as a parabola is not useful since this is an expression of a statistical phenomenon that varies from case to case. We utilized the minimum squares fit to obtain a regression curve that provides the nearest possible representation of urinary flow. Furthermore, we consider the flow curve to be the result of forces that develop in the detrusor, which produces the complex phenomenon of voiding. This study is the first step toward the development of a mathematical representation of the urinary flow mechanics.

Humans↗

PubMed1995

[The dissolution of cystine lithiasis with n-acetylcysteine].

OBJECTIVE: The results of in situ dissolution of a cystine calculus is described. This approach was attempted in a female patient for whom surgery was not considered to be the best therapeutic option. METHODS: An obstructive cystine calculus was treated by in situ litholysis using N-acetylcysteine applied locally via two percutaneous nephrostomies and adjuvant oral metaphylaxis. The patient had a long clinical history of lithiasis that had also required surgery and a family history of cystinuria. RESULTS: In situ litholysis completely dissolved the cystine calculus and avoided the need for a complex surgery. The procedure and a pharmacological analysis are presented. CONCLUSIONS: In our view, this procedure is practical, carries minimal morbidity and should be considered in the management of cystine calculus.

Acetylcysteine↗

PubMed1994

[Primary epidermoid carcinoma of the bladder. Its diagnosis and treatment and a review of the literature].

Presentation of four patients with primary plain epidermoid carcinoma of the bladder. The patients, three men and one woman, aged 50-74 years, presented clinically with gross haematuria and irritative mictional syndrome; their background was prostatism with in-dwelling vesical catheter and repeat urinary infections. Revision of the immunohistochemical pattern and the clinico-pathological differential diagnosis, as well as the pathoetiology, biological behaviour and management of this uncommon type of tumour.

Aged↗

PubMed1993

[Right hematocolpos and hematometra with left renal agenesis. A rare association. Apropos a case].

Although this anomaly is seen more frequently, the present case is unique in that the genital anomaly (imperforate vagina with the subsequent hematocolpos and hematometra) was associated with contralateral renal agenesis, whereas the cases reported in the literature have all been ipsilateral. Like most of the cases, the presenting symptom was acute urinary retention arising from extrinsic compression of the genital mass on the lower urinary tract. The embryological aspects of the genitourinary system concerning the present case are discussed, as well as some of the hypotheses that have been put forward to explain the etiology of these anomalies, although these have been developed on the basis of the associated ipsilateral anomalies observed.

Abnormalities, Multiple↗