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1.
Journal of Neurogastroenterology and Motility ; : 539-546, 2014.
Artículo en Inglés | WPRIM | ID: wpr-87255

RESUMEN

BACKGROUND/AIMS: External anal sphincter (EAS) and puborectalis muscle (PRM) play important role in anal continence function. Based on length-tension measurement, we recently reported that the human EAS muscle operates at short sarcomere length under physiological conditions. Goal of our study was to determine if PRM also operates at the short sarcomere length. METHODS: Length-tension relationship of the PRM muscle was studied in vivo in 10 healthy nullipara women. Length was altered by vaginal distension using custom-designed probes of 5, 10, 15, 20, 25 and 30 mm diameters as well as by distending a polyethylene bag with different volumes of water. Probes were equipped with a reverse perfuse sleeve sensor to measure vaginal pressure (surrogate of PRM tension). PRM electromyogram (EMG) was recorded using wire electrodes. Three-dimensional ultra-sound images were obtained to determine effect of vaginal distension on PRM length. RESULTS: Ultrasound images demonstrate distension volume dependent increase in PRM length. Rest and squeeze pressures of vaginal bag increased with the increase in bag volume. Similarly, the change in vaginal pressure, which represents the PRM contraction increased with the increase in the probe size. Increase in probe size was not associated with an increase in EMG activity (a marker of neural drive) of the PRM. CONCLUSIONS: Probe size dependent increase in PRM contraction pressure, in the presence of constant EMG (neural input) proves that the human PRM operates at short sarcomere length. Surgically adjusting the PRM length may represent a novel strategy to improve treat anal continence and possibly other pelvic floor disorders.


Asunto(s)
Femenino , Humanos , Canal Anal , Electrodos , Incontinencia Fecal , Músculos , Trastornos del Suelo Pélvico , Polietileno , Sarcómeros , Ultrasonografía , Agua
4.
Indian J Public Health ; 1976 Oct-Dec; 20(4): 217-8
Artículo en Inglés | IMSEAR | ID: sea-109773

Asunto(s)
India
7.
J Indian Med Assoc ; 1960 Oct; 35(): 323-6
Artículo en Inglés | IMSEAR | ID: sea-105608

Asunto(s)
Hospitales
8.
J Indian Med Assoc ; 1958 Jul; 31(2): 73-80
Artículo en Inglés | IMSEAR | ID: sea-104994
9.
J Indian Med Assoc ; 1957 Mar; 28(5): 223-9
Artículo en Inglés | IMSEAR | ID: sea-102235
10.
J Indian Med Assoc ; 1954 Jan; 23(4): 137-42
Artículo en Inglés | IMSEAR | ID: sea-100079

Asunto(s)
Quistes
11.
J Indian Med Assoc ; 1947 Dec; 17(3): 75-84
Artículo en Inglés | IMSEAR | ID: sea-96506

Asunto(s)
Urgencias Médicas
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