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Study of diagnosing colorectal disease using oral ultrasonic bowel contrast solution

Objective: Study of diagnosing colorectal disease using oral ultrasonic bowel contrast solution. Methods: After defecation, the patient took 70-100ml contrast agent and 500-700 ml water, until the agent filled the colorectum, then examination started. Results: The detectable rate was 98%, the locative accurate rate was 92.1 % and the qualitative coincidence rate was 78 .2% in middle-late stage of colorectal cancer with ultrasound. The detectable rate of early stage tumor was concered with the clean degree of colorectal tract and the experience of examiner. It can identify the benign from malignancy in some degree. The detectable rate of ultrasound for colorectal non-space-occupied lesion was lower than that of colorectal space- occupied lesion. Most of the miss-dignosed were small or slight. Conclusion: Oral ultrasonic contrast agent diagnosing colorectal disease is feasible. It's a convenient and quick screening method.