Yes, absolutely. The signature on a consent form does not indicate, in any way, shape or form, proper and informed consent.
Proper and informed consent involves four pillars: capacity; full disclosure of the risk, consequences and options; the appropriate environment in which to consider that information and time to do so; and the absence of coercion.
I'll quickly recall D.D.S.'s story where, immediately before the administration of an epidural, the surgeon interrupted the discussion with the anesthesiologist in an abrupt and aggressive manner, directing her to sign a consent form for the Caesarean section. D.D.S. noticed that a tubal ligation was also listed on the consent form but did not believe she had a choice but to sign. These are the types of circumstances in which this is arising. When you're bent over in a hospital robe awaiting a needle in your spine and a clipboard is thrown into your face, it's really difficult to call that proper and informed consent.