LD测试的通常反应包括，抽搐、呕吐、麻痹或眼睛鼻子嘴直肠出血。

Common reactions to LD tests include convulsions, vomiting, paralysis and bleeding from the eyes, nose, mouth or rectum.

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移动肠通便使用后的直肠出血或失败，可能表示病情严重。

Rectal bleeding or failure to move bowel after laxative use may indicate a serious condition.

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目的：监测初级保健机构中新发直肠出血患者的结直肠癌和腺瘤的患病风险。

Objective to measure the risk of colorectal cancer and adenoma with new onset rectal bleeding reported to primary care.

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