Results 191 to 200 of about 9,782 (234)

Transmitter interactions in rabbit internal anal sphincter

American Journal of Physiology-Gastrointestinal and Liver Physiology, 1995
The aim of the present study was to investigate the relative importance of the different putative nonadrenergic noncholinergic (NANC) mediators and their interplay with cholinergic nerves in the rabbit internal anal sphincter (IAS). IAS preparations were mounted in organ baths for recording of isometric tension.
M A, Knudsen, E B, Glavind, A, Tøttrup
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The Internal Anal Sphincter in Anorectal Malformation

European Journal of Pediatric Surgery, 1990
Recently it has been morphologically clarified that a layer of thick smooth muscle, mimicking the internal anal sphincter, exists at the rectal and even in high and intermediate anorectal malformations. This paper will describe two studies focussed on the internal anal sphincter in anorectal malformation. I.
K, Ohama, S, Asano, K, Nanbu, T, Kajimoto   +3 more
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The Internal Anal Sphincter in Systemic Sclerosis

Diseases of the Colon & Rectum, 2009
Fecal incontinence in systemic sclerosis can occur secondary to fibrous replacement of the internal sphincter or ischemic myopathy of internal anal sphincter from vasculitis. Both lead to morphologic changes of the internal anal sphincter on endoanal ultrasound.
Cherry E, Koh, Christopher J, Young, Caroline M, Wright, Christopher M, Byrne, Jane M, Young   +4 more
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Internal anal sphincter in neurogenic fecal incontinence

Gastroenterology, 1988
In neurogenic fecal incontinence there is denervation of the external anal sphincter and pelvic floor muscles but the role of the internal anal sphincter is incompletely understood. We have evaluated the internal anal sphincter in 6 patients with neurogenic incontinence undergoing postanal repair and in 7 control subjects. All the incontinent subjects,
D Z, Lubowski, R J, Nicholls, D E, Burleigh, M, Swash   +3 more
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Histopathology of the internal anal sphincter in chronic anal fissure

Diseases of the Colon & Rectum, 1989
A prospective study of 18 consecutive patients undergoing unilateral, partial-thickness, distal, internal sphincterotomy for the treatment of chronic anal fissure was performed. Biopsies were taken from the base of the fissure and from the lateral muscle before division.
A C, Brown, J M, Sumfest, J V, Rozwadowski   +2 more
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Clinical outcome of anterior overlapping external anal sphincter repair with internal anal sphincter imbrication

Diseases of the Colon & Rectum, 1998
Fecal incontinence caused by overt anterior sphincter defects sustained during childbirth is usually treated by a delayed overlapping repair of the external anal sphincter. However, an obstetric trauma is frequently associated with disruption of the perineal body and loss of the distal rectovaginal septum.
Briel, JW, de Boer, LM, Hop, , Schouten, Willem Rudolf   +3 more
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Do internal anal sphincter defects decrease the success rate of anal sphincter repair?

Techniques in Coloproctology, 2006
Anatomic anal sphincter defects can involve the internal anal sphincter (IAS), the external anal sphincter (EAS), or both muscles. Surgical repair of anteriorly located EAS defects consists of overlapping suture of the EAS or EAS imbrication; IAS imbrication can be added regardless of whether there is IAS injury. The aim of this study was to assess the
M, Oberwalder, A, Dinnewitzer, M K, Baig, J J, Nogueras, E G, Weiss, J, Efron, A M, Vernava, S D, Wexner   +7 more
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Endosonographic variations in the normal internal anal sphincter

International Journal of Colorectal Disease, 1991
Anal endosonography provides clear images of the internal anal sphincter. Forty-two controls have been studied to establish a range for thickness and echogenicity of the normal internal sphincter, and any physical correlate for these observations. No relationship was found between the thickness of the internal anal sphincter and body weight, height or ...
S J, Burnett, C I, Bartram
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Myopathy of internal anal sphincter with polyglucosan inclusions

The Journal of Pathology, 1990
Abstract In two members of an affected family with a hereditary syndrome of proctalgia fugax and constipation, a hypertro‐phied internal anal sphincter was found with histological features suggesting a myopathy of this muscle. In these two patients, and in an unrelated patient with a similar clinical syndrome, smooth muscle fibres of ...
J E, Martin, M, Swash, M A, Kamm, K, Mather, E L, Cox, A, Gray   +5 more
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Should We Care About the Internal Anal Sphincter?

Diseases of the Colon & Rectum, 2012
The internal anal sphincter is currently regarded as a significant contributor to continence function. Four physiological and morphological aspects of the internal anal sphincter are presented as part of the current evidence base for its preservation in anal surgery.
Andrew P, Zbar, Marat, Khaikin
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