| Summary: | 碩士 === 中山醫學院 === 醫學研究所 === 84 === Ultrasonic examination has become increasing important in the
diagnosis of disease of the gastrointestinal tract.
Hydrocolonic sonography--abdominal ultrasonography in
conjunction with the retrograde instillation of pre-warmed
saline into the colon--has been advocated as an alternative
tocolonoscopy for detecting colorectal polyps and cancer. The
aim of this study was to determine whether the detection and
tumor invasion depth staging would be improved by the
hydrocolonic sonography. Over the course of 6 months, a total
of 25 consecutive patients, (12M, 13F,age 28-80 years-old) were
enrolled in this prospective study. All cases wereevaluated with
double-contrast barium enema prior to this
hydrocolonicsonography. There were 22 cases of colorectal
carcinomas and 3 cases of non-neoplasticlesions( appendiceal
abscess 1, granulomatous colitis 1, adenoma 1).Conventional
trans-abdominal sonography had only 28% positive rate,
withsensitivity 31.8%.While hydrocolonic sonography had 96%
positive rate,with sensitivity 95.5%. It demonstrated that
marked improvement in the ultrasonic diagnosis of colonic tumor
can be achieved with hydrocolonic sonography. Also hydrocolonic
sonography can examine structure of the bowel wall with a
clarity comparable to that achieved with endosonography andto
determine the tumor invasion depth with a high degree of
accuracy. In ourstudy, only 2 cases were missed-reading. In
conclusion, Hydrocolonic sonography allows the diagnosis and
pre-operativeT-staging of colorectal carcinomas with high
sensitivity, specificity, and predictive value. It is well
tolerated by patients and is thus particularlywell suited for
the diagnosis of colonic tumors in outpatients.
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