Bert van der Werf

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PURPOSE To identify the functional innervation of the striated muscle layer of the post-prostatic urethra of male dogs. MATERIALS AND METHODS Detailed anatomic dissection of the pelvic and pudendal nerves was carried out. The pressure and contractile responses to stimulation of these nerves were recorded in vivo and in vitro. RESULTS Small branches of(More)
BACKGROUND The present study was performed to determine whether a 'urogenital diaphram' exists, to examine the true nature of the striated external urethral sphincter and to evaluate whether the standard technique for radical prostatectomy damages the external sphincter. METHODS Fifty radical prostatectomies were performed using optical magnification and(More)
OBJECTIVE To investigate the properties of the smooth muscle layers in the urethral wall of male and female greyhounds, and to consider their roles in continence and micturition. MATERIALS AND METHODS The distribution and innervation of the smooth muscle layers of the prostate capsule and membranous urethra of male greyhounds were assessed. Strips of(More)
The striated muscle forms an outer sleeve around the urethra and occupies about 80% of the wall. In humans more than 60% of the muscle consists of slow, fatigue resistant type I fibres whereas in male greyhounds only about 6% are type I. Most of the remainder (70% of fibres) are type IIa which are classified as fast but can contract for several hours with(More)
OBJECTIVE To determine the properties of the striated muscle of the greyhound (dog) urethra and to consider its role in maintaining continence. Materials and methods The thickness of the muscle layers and the muscle types were determined by examining sections stained with haematoxylin and eosin or Masson's trichrome. These factors were correlated with the(More)
BACKGROUND Disturbed psychiatric inpatients are managed using a range of containment measures (e.g. seclusion, mechanical restraint) whose use differs by country. Little is known about why these differences exist, or about how staff choose between the different methods available to them. AIMS To compare psychiatric professionals attitudes to containment(More)