Now they wear rubber fingers treated with lactic acid.

现在他们带乳酸处理过的指套。

Medical examination of the prostate, usually with his right index finger, put on rubber fingerstall, into the anus to check for palpation.

医生检前列腺时，一般是右手食指，戴指套，由肛门伸进去作触诊检的。