When used for pregnancy evacuation,<unk>  is 98% effective in removing all uterine contents. One of the main complications is retained products of conception which will usually require a second<unk>  procedure. This is more common when the procedure is performed very early in pregnancy, before 6 weeks gestational age. Another complication is infection, usually caused by retained products of conception or introduction of vaginal flora (otherwise known as bacteria) into the uterus. The rate of infection is 0.5%. Other complications occur at a rate of less than 1 per 100 procedures and include excessive blood loss, creating a hole through the cervix or uterus (perforation) that may cause injury to other internal organs. Blood clots can possibly form within the uterus and block outflow of bleeding from the uterus which can cause the uterus to be enlarged and tender.
Vacuum aspiration
Helmet removal 
Antiseptic lavage
Suction
Suction 
Vacuolization
Freeze spray
Terminal cleaning