what is a donut pessary
The large end of the pessary is placed deep in the vagina, the small end of the stem protruding at the introitus. A doughnut pessary is a permanently inflated flexible rubber doughnut that is inserted to support the uterus by blocking the canal of the vagina. An inflatable pessary is a collapsible rubber doughnut to which a flexible stem containing a rubber valve is attached. The collapsed pessary is inserted, inflated with a bulb similar to that of a sphygmomanometer, and deflated for removal. A bee cell pessary is a soft rubber cube.