Physiological and Functional Evaluation of the Transposed Human Pylorus as a Distal Sphincter
Journal of Neurogastroenterology and Motility
;
: 269-277, 2012.
Article
in English
| WPRIM
| ID: wpr-22762
ABSTRACT
BACKGROUND/AIMS:
Studies evaluating the human pylorus as a sphincter are scanty and contradictory. Recently, we have shown technical feasibility of transposing the human pylorus for end-stage fecal incontinence. This unique cohort of patients provided us an opportunity to study the sphincter properties of the pylorus in its ectopic position.METHODS:
Antro-pylorus transposition on end sigmoid colostomies (n = 3) and in the perineum (n = 15) was performed for various indications. Antro-pylorus was assessed functionally (digital examination, high resolution spatiotemporal manometry, barium retention studies and colonoscopy) and by imaging (doppler ultrasound, MRI and CT angiography) in its ectopic position.RESULTS:
The median resting pressure of pylorus on colostomy was 30 mmHg (range 28-38). In benign group, median resting pressure in perineum was 12.5 mmHg (range 6-44) that increased to 21.5 mmHg (range 12-29) (P = 0.481) and 31 mmHg (range 16-77) (P = 0.034) on first and second follow-up, respectively. In malignant group, median post-operative pressures were 20 mmHg (range 14-36) and 21 mmHg (range 18-44) on first and second follow-up, respectively. A definite tone and gripping sensation were felt in all the patients on digital examination. On distal loopogram, performed through the diverting colostomies, barium was retained proximal to the neo-pyloric valve. Both perineal ultrasound and MRI showed viable transposed graft. CT angiography and color doppler studies confirmed vascular flow in the transposed position.CONCLUSIONS:
The human pyloric valve can function as a tonic sphincter when removed from the gastroduodenal continuity.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Perineum
/
Pylorus
/
Retention, Psychology
/
Sensation
/
Colon, Sigmoid
/
Barium
/
Colostomy
/
Angiography
/
Cohort Studies
/
Follow-Up Studies
Type of study:
Etiology study
/
Incidence study
/
Observational study
/
Prognostic study
/
Risk factors
Limits:
Humans
Language:
English
Journal:
Journal of Neurogastroenterology and Motility
Year:
2012
Type:
Article
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