Why does the doctor need me to sign a consent
form?
The main purpose of the informed consent process is to protect the patient. As mentioned earlier, a
capable adult cannot be forced to have any type of medical treatment. In general, anything other
than a life-threatening emergency in which the patient is unconscious requires consent before
treatment. Even in that situation, consent may be required if the patient is known to have an
advance directive. (See “Who besides the patient can give consent?”)
A consent form is not needed for simple diagnostic tests and situations in which your actions imply
consent. For example, if you see your doctor and allow a blood sample to be taken for lab tests,
your consent is assumed because you went to the doctor seeking care and allowed blood to be
drawn. At any point, you could change your mind and decide to refuse testing, leave the doctor’s
office, or seek care elsewhere. This is different from a treatment that puts you in a vulnerable
position or can possibly cause serious harm. You need more information about more risky
treatments so that you can weigh your options and consider your risks before making a decision.
Even when there are no other accepted medical treatment options, it’s still your right as a
competent adult to refuse a treatment that you don’t want or refuse to be in a study that you didn’t
choose. But once you sign the consent form, it’s taken to be a formal, legal agreement that you are
OK with the plan or procedure that’s listed on the form unless you revoke (take back) your consent
before treatment is given. The doctor or facility will usually give you a copy of the consent form,
but they keep the original as a legal record that you agreed to the treatment.
 
Why does the doctor need me to sign a consentform?The main purpose of the informed consent process is to protect the patient. As mentioned earlier, acapable adult cannot be forced to have any type of medical treatment. In general, anything otherthan a life-threatening emergency in which the patient is unconscious requires consent beforetreatment. Even in that situation, consent may be required if the patient is known to have anadvance directive. (See “Who besides the patient can give consent?”)A consent form is not needed for simple diagnostic tests and situations in which your actions implyconsent. For example, if you see your doctor and allow a blood sample to be taken for lab tests,your consent is assumed because you went to the doctor seeking care and allowed blood to bedrawn. At any point, you could change your mind and decide to refuse testing, leave the doctor’soffice, or seek care elsewhere. This is different from a treatment that puts you in a vulnerableposition or can possibly cause serious harm. You need more information about more riskytreatments so that you can weigh your options and consider your risks before making a decision.Even when there are no other accepted medical treatment options, it’s still your right as acompetent adult to refuse a treatment that you don’t want or refuse to be in a study that you didn’tchoose. But once you sign the consent form, it’s taken to be a formal, legal agreement that you areOK with the plan or procedure that’s listed on the form unless you revoke (take back) your consentbefore treatment is given. The doctor or facility will usually give you a copy of the consent form,but they keep the original as a legal record that you agreed to the treatment.
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