而摇铃主要作为年老体弱患者需要非语言交流的信号，满意率为97.37%。

Bell ringing, as a signal of non language communication, was especially prepared for the senile and infirm patients, with a satisfaction rate of 97.37%.

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对年老体弱、心肺功能不全或因梗阻引起尿毒症的患者更为安全。

It is safer for patients of the aged, debility with cardiopulmonary dysfunction or uremia due to partial obstruction.

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结果患者多为年老体弱或长期服用多种泻药，症状主要有食欲减低、腹胀、腹痛、体重下降；

Results The patients were an elder, weakness or taking multiple cathartic for a long time. The main symptoms were anorexia, distension, loss of body weight.

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