Stoll Cyst Aspirator - Disassembled.
Stoll cyst aspirator. The top portion is the outer shaft with an enlarged atraumatic knob at the end. The center portion is a large needle, which slides inside the shaft, and is used to penetrate the fornix. At the bottom is a small gauge aspirating needle which is advanced, via the large needle, into the cyst, after the cyst has been positioned, transrectally, against the blunt end of the instrument, which is still in the fornix.
Drost M (1971)