Doctors are required to educate their patients on the risks, success rates, and any existing alternatives as it pertains to treatment. Patients must also be allowed time to process this information and have their questions answered before they decide, and patients cannot be coerced into making their decision. This requirement is called informed consent.
A signature on a form doesn’t necessarily imply informed consent. If the form was poorly-written or contained incomplete information, it’s possible that you have a lawsuit on the grounds of having not given informed consent. In such a case, consult with your medical injury attorney to discuss your options.