Now they wear rubber fingers treated with lactic acid.

现带上了用乳酸处理过的橡皮指。

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，一般是用右手食指，戴上橡皮指，门伸进去作触诊检的。