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Biomedical subjects

M A Ghoneim

Publications and source records attributed to M A Ghoneim.

At least 181 records · Page 10Linked to original sources
PubMed1975

Urethral pressure profile. Standardization of technique and study of reproducibility.

The different methods utilized for measurement of urethral resistance were critically reviewed. Using dogs, experiments were done to standardize the pressure profile measurement. A catheter with eight side holes measureing 0.34 mm. each was found to give the best results. The various parameters which can influence the procedure were analyzed. Strict specifications are proposed to be utilized for such a procedure.

Animals↗
PubMed1975

The influence of vesical distension on urethral resistance to flow: the collecting phase.

Using female dogs, changes in the urethral pressure profile in response to vesical distension were studied. It was noted that during the collecting phase there was an increase in the amplitude of the profile tracing. These experiments revealed that this increase is not mediated through an autonomic reflex and does not reflect a significant enhancement of alpha-adrenergic activity. These changes are mainly due to increased tension of the urethral muscle, secondly to detrusor stretch.

Animals↗
PubMed1975

The influence of vesical distension on urethral resistance to flow: the expulsion phase.

The influence of vesical distension of the urethral pressure profile was studied in female dogs, using a model in which the bladder and urethra were separated. There was a reduction in the urethral resistance involving its smooth and striated muscle components. This reduction was completely blocked by ganglion blocking agents. Atropine did not influence these changes. Propranolol could only partially block this reflex. The other possible mechanisms that could be involved were discussed.

Animals↗
PubMed1975

[Urethral profile: study of a technique (author's transl)].

The different methods used for the measurement of urethral resistance were critically reviewed. Experimental studies were carried out to standardize pressure profile measurements. A catheter with 8 side holes was found to give the best results. The various parameters which can influence the measure were studied. Strict specifications of the procedure are proposed.

Animals↗