fingerstall

1. Medical examination of the prostate, usually with his right index finger, put on rubber fingerstall, into the anus to check for palpation.
   医生检查前列腺时，一般是用右手食指，戴上橡皮指套，由肛门伸进去作触诊检查的。

noun

1. a sheath worn to protect a finger

   Synonym:    cot