Basal electrical activity in the anal canal in man.

Wankling, W J; Brown, Brian; Collins, C. D.; Duthie, H. L.

doi:10.1136/gut.9.4.457

Cited by 78 publications

(24 citation statements)

References 6 publications

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Section: Discussionmentioning

confidence: 99%

“…The prevalence rate of USWs in normal subjects varies in each report (Caplan et al 1964;Wankling et al 1968). Among these published reports, the first one, by Wankling et al (1968) has an exceptionally high prevalence rate (70%) in normal subjects. The large diameter (1 cm) of the pressure sensor inserted in the rectum utilized by Wankling et al (1968) might have affected the prevalence rate.…”

Section: Discussionmentioning

confidence: 99%

“…After the report by Wankling et al (1968), USWs have been described in several clinical conditions closely related to chronic constipation such as hemorrhoids (Roe et al 1987;Schouten and Blankensteijin 1992) and anal fissures (Farouk et al 1994;Bhardwaj et al 2000). The prevalence rate of USWs in normal subjects varies in each report (Caplan et al 1964;Wankling et al 1968).…”

Section: Discussionmentioning

confidence: 99%

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Multiple Clinical Presentations of Anal Ultra Slow Waves and High Anal Pressure: Megacolon, Hemorrhoids and Constipation

Yoshino

Kayaba

Morii

et al. 2007

Tohoku J. Exp. Med.

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The physiopathology of idiopathic chronic constipation is complex and yet to be investigated. In the manometric studies of the patients with severe chronic constipation, we noticed that some patients with megacolon show very slow periodical (< 2/min) pressure change in the anal canal, namely ultra slow waves (USWs). USWs are considered to represent the hyperactivity of the internal anal sphincter; however, USWrelated clinical presentations have yet to be investigated. We retrospectively re-evaluated the patient records and manometric studies of 85 cases, 51 subjects without defecatory problems and 34 patients with constipation, to elucidate USW-related clinical presentations. USWs were seen in 10 patients, including eight patients with chronic constipation and two subjects without defecatory problems. Out of the eight patients with constipation, one had no organic change in the anorectum, three had hemorrhoids and four exhibited megacolon. Manometric and pathological studies proved that none of the four patients with magacolon was suffering from Hirschsprung's disease. Among the 51 subjects without defecatory problems, only two had USWs. Anal pressure in the USW-positive group (106.0 ± 37.0 cmH 2 O) was significantly higher than that in the group without defecatory problems (56.0 ± 27.0 cmH 2 O) or constipated patients without USWs (55.0 ± 26.0 cmH 2 O). Megacolon and high anal pressure, as well as chronic constipation and hemorrhoids, were the clinical presentations related to USWs. This is the first report to show the clinical relevance of USWs to megacolon. USWs should be recognized as an important manometric finding indicating a possible new clinical entity in chronic constipation. ultra slow wave; manometry; constipation; megacolon; high anal pressure

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Multiple Clinical Presentations of Anal Ultra Slow Waves and High Anal Pressure: Megacolon, Hemorrhoids and Constipation

Yoshino

Kayaba

Morii

et al. 2007

Tohoku J. Exp. Med.

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show abstract

“…Each force gauge was calibrated by applying a force of 6 g weight to the midpoint of each platform and adjusting the amplification so that the recorded trace moved 4 cm. Like previous force gauges used (Collins et al, 1967;Wankling et al, 1968) each cantilever responded only to radial force, so radial force acting at 16 separate sites in the anal canal could be measured. A 12-channel ultraviolet light recorder was used so the output from a maximum of 12 strain gauges could be recorded at any one time.…”

Section: The Multiple Force Gaugementioning

confidence: 99%

New method of measuring forces in the anal canal.

Collins¹,

Brown²,

Whittaker³

et al. 1969

Gut

Self Cite

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“…Although there are onsiderable differences in the electrical rhythms between species the spontaneous activity has been recorded in the stomach, small intestine, large intestine and rectum (4,5,6,7).…”

Section: Introductionmentioning

confidence: 99%

Optimisation in the modelling of digestive tract electrical signals

Linkens

1976

Optimization Techniques Modeling and Optimization in the Service of Man Part 1

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Basal electrical activity in the anal canal in man.

Cited by 78 publications

References 6 publications

Multiple Clinical Presentations of Anal Ultra Slow Waves and High Anal Pressure: Megacolon, Hemorrhoids and Constipation

Multiple Clinical Presentations of Anal Ultra Slow Waves and High Anal Pressure: Megacolon, Hemorrhoids and Constipation

New method of measuring forces in the anal canal.

Optimisation in the modelling of digestive tract electrical signals

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