Anorectal manometry findings in constipated patients with and without increasing pressure during straining / Caracterização dos achados de manometria anorretal em portadores de constipação com e sem elevação dos valores de pressão ao esforço de evacuação

AUTOR(ES)
DATA DE PUBLICAÇÃO

2010

RESUMO

Constipation is a symptom with many causes. It can be classified as primary when its cause is unknown or secondary when a specific cause can be pointed out. Primary constipation is a collective term that adds together different disorders. From those, the pelvic floor dyssynergia is characterized by the inability to empty the rectum after straining in the absence of mechanic obstruction. To provide a better diagnosis, specific exams, including anorectal physiology tests are necessary. Anorectal manometry can be taken as an example of those exams. The aim of this study was to describe manometric parameters found in patients with constipation with or without increase in anal pressures during straining. Thirty patients with constipation and Agachan score of at least 10 were evaluated using anorectal manometry (a probe with eight axially oriented channels was employed). They were 28 females (90%), with a mean age of 51,5 (+ 12,4) years. Patients were divided accorded with manometric findings into: Group 1 (G1) which included those that showed sustained increase in anal pressures during straining and Group 2 (G2) which included the patients who presented a decrease in those values. Diagnosis of pelvic floor dyssynergia was made when a increase in anal pressures during straining was found. Resting pressure, maximum squeeze pressure and maximal evacuation effort pressure were evaluated. Data analysis shows with confidence interval of 95% that a difference larger than 16,5 mmHg between median resting and evacuation effort pressure or a percentual difference higher than 79,2% in median pressures and the difference larger than 16,2 mmHg in maximal pressures between rest and straining and the percentual difference higher than 57,4% can identify patients with pelvic floor dyssynergia constipation

ASSUNTO(S)

manometria constipação manometry constipation

ACESSO AO ARTIGO

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