What point during surgery is a pelvic wash done?

Clarify question : I am not clear on your question. If you are referring to washing out the abdominal cavity/pelvic cavity it would usually occur at the end of the surgery. If there was a lot of contamination then it would occur at the beginning. Please clarify your question and re-ask.

P W C: Pelvic washing cytology is a useful tool , (pelvic wash ) for gynecological and non gynecological diseases , for both benign and malignant diseases and for staging before the procedure is contemplated irrigated fluid is collected , cells are collected & analyzed , if tumor cells are found staging will change . It also helps for correct therapy .