A Answers (1)
Marc Garnick, MD, Oncology, answeredTo achieve an erection when using a vacuum pump for erectile dysfunction (ED), a man puts his lubricated penis into an airtight plastic cylinder attached to a handheld pump. Pumping air out of the cylinder creates a vacuum, which increases blood flow to the penis and causes an erection. An elastic band placed at the base of the penis maintains the erection. The erection lasts until the band is removed.