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Biomedical subjects

A J Thiry

Publications and source records attributed to A J Thiry.

At least 19 recordsLinked to original sources
PubMed1989

Neurophysiological assessment of the central motor pathway to the external urethral sphincter in man.

A recently developed neurophysiological method by which the motor cortex in man can be electrically stimulated has been applied to the assessment of the central motor pathway to the external urethral sphincter. It was observed that there was parallel activation of the anal sphincter, the pelvic floor and the lower limb muscles, voluntary facilitation and marked inhibition during micturition. This method can be used to assess the volitional and the various segmental and suprasegmental influences on the behaviour of the external urethral sphincter. Unfortunately, the poor tolerance of subjects to the scalp sensations caused by the electrical stimulus is a major limitation to its clinical use, though this should be obviated by the introduction of a cortical magnetic stimulator.

Action Potentials↗
PubMed1989

Urinary bladder cortical evoked potentials in man: suitable stimulation techniques.

A practical and easily applicable method of recording cortical potentials evoked by bipolar electrical stimulation of the bladder wall is described. This constitutes an objective electrophysiological test of afferent bladder central projections. Comparison of bipolar and monopolar methods of intravesical stimulation led to the conclusion that the simpler monopolar intravesical electrode technique is unsuitable because it yields potentials contaminated by extravesical components.

Adult↗
PubMed1983

[Etiology of urinary sphincter disorders following cerebral vascular accidents].

Urological and neurological investigations were carried out in a homogeneous population of 77 hemiplegic patients treated in a neurological rehabilitation department, in an attempt to identify the etiology of secondary bladder dysfunction in such cases, with the aid of computerized data. The following conclusions were reached. Bladder retention was proved to result invariably from a mechanical obstacle. Permanent bladder incontinence was always due to urinary infection and/or mental deterioration. Exclusively nocturnal incontinence was shown to be a "pseudo-incontinence". It was shown that an uninhibited bladder played no part in incontinence but was always present in cases of an urgent need to urinate.

Adult↗
PubMed1983

Blind-ending bifid and double ureters.

Bifid and double blind ureters are two rare congenital anomalies of the upper urinary tract. Usually they are incidental findings. Occasionally, they are associated with urinary tract infection, but the symptoms are not specific. The key to diagnosis is a careful urethral cystoscopy and retrograde pyelogram. Asymptomatic patients without urinary tract infection require no treatment. When symptoms or infection are present, excision of the blind branch is required with antireflux reimplantation of the normal ureter if needed.

Adult↗
PubMed1980

Spontaneous rupture of right iliac arterial aneurysm into ureter.

Among the causes of severe hematuria, spontaneous ruptures of aneurysms into the urinary tract are rare. The diagnostic approach and treatment of this disease constitute a difficult urologic problem whose clinical, radiologic, and anatomopathologic aspects are discussed.

Aged↗
PubMed1980

Ureteral stasis in cervicoprostatic obstructions.

A urodynamic study of patients with prostatic adenoma or other types of cervicoprostatic obstructions demonstrate that ureteral stasis is not a consequence of a direct compression of the intramural ureter by the adenoma but is secondary to dynamic disturbances.

Constriction, Pathologic↗
PubMed1980

Contribution of angiography in bladder cancer.

Pelvic angiography was performed in 24 patients with primary or secondary tumours. 17 patients were submitted to arteriography and 7 to phlebography of the pelvis veins. An angiographic classification was established and compared to the pre-operative and histopathological results determining tumour staging. These results were compared to those obtained by bimanual palpation under narcosis and demonstrated the significant contribution of angiography in determining the extravesical spreading of bladder tumours.

Adenocarcinoma↗
PubMed1980

[Sub-peritoneal schwannoma (author's transl)].

The authors report a rare case of sub-peritoneal malignant schwannoma developing 5 years after excision of a schwannoma of the sigmoid. The non-excised tumour compressed the bladder and one ureter. This type of tumour, extremely rare, accounts for less than 2% of tumours. Arising in the cells of the Schwann sheath, and as a general rule developing in the central nervous system, peripheral nerves of the neck, mediastinum, flexor surfaces of the extremities or nerves of the digestive tract, they may be benign tumours do not recur. The example reported here showed that this distinction is in no way absolute.

Adult↗