<unk> ' double bladed vaginal<unk> <unk>  is a double-bladed surgical instrument used for examining the vagina and cervix. It was developed by J. Marion<unk>  out of pewter spoon, but nowadays it is manufactured out of stainless steel or plastic. The plastic<unk>  is disposable, but the stainless steel one is not. Therefore, the stainless steel<unk>  should be sterilized before each use.<unk> '<unk>  is inserted into the vagina to retract posterior vaginal wall. It gives more exposure of the vaginal walls than Cusco's<unk>  and therefore is preferred for gynaecological surgeries. it is possible to slide the instrument around the vaginal wall to enable better visualization. The groove in the middle of<unk> '<unk>  allows free flow of secretions and blood to the outside, thereby keeping the area dry.<unk> '<unk>  is available in various sizes, and the size appropriate to the vaginal dimensions of the woman is chosen for use. The disadvantage of<unk> '<unk>  is that it is not self-retaining. The examiner might want to use an anterior wall retractor in addition to<unk> '<unk>  for better visualization of the cervix.
Sims' vaginal speculum
Vaginal photoplethysmograph
Fertiloscope
High vaginal swab
Vaginal wet mount
Orchidometer
Ortolani test
Vaginal ultrasonography