Consent to Medical Treatment in UK Law

An adult patient who, like Miss T., suffers from no mental incapacity has an absolute right to choose whether to consent to medical treatment, to refuse it or to choose one rather than another of the treatments being offered. It exists notwithstanding that the reasons for making the choice are rational, irrational, unknown or even non-existent (Sidaway v. Board of Governors of the Bethlem Royal Hospital and Maudsley Hospital [1985] A.C. 871, 904F-905A).

Doctors faced with a refusal of consent have to give very careful and detailed consideration to the patient's capacity to decide at the time when the decision was made. What matters is that the doctors should consider whether at that time he had a capacity which was commensurate with the gravity of the decision which he purported to make. The more serious the decision, the greater the capacity required.

First, it is established that the principle of self-determination requires that respect must be given to the wishes of the patient, so that if an adult patient of sound mind refuses, however unreasonably, to consent to treatment or care by which his life would or might be prolonged, the doctors responsible for his care must give effect to his wishes, even though they do not consider it to be in his best interests to do so (see Schloendorff v. Society of New York Hospital 105 N.E. 92, 93, per Cardozo J. (1914); S. v. McC. (Orse S.) and M (D.S. Intervener); W v. W [1972] A.C. 24, 43, per Lord Reid; and Sidaway v. Board of Governors of the Bethlem Royal Hospital and the Maudsley Hospital [1985] A.C. 871, 882, per Lord Scarman).

But in many cases not only may the patient be in no condition to be able to say whether or not he consents to the relevant treatment or care, but also he may have given no prior indication of his wishes with regard to it.

The doctor who is caring for such a patient cannot, in my opinion, be under an absolute obligation to prolong his life by any means available to him, regardless of the quality of the patient's life. As I see it, the doctor's decision whether or not to take any such step must (subject to his patient's ability to give or withhold his consent) be made in the best interests of the patient.

Even so, where (for example) a patient is brought into hospital in such a condition that, without the benefit of a life support system, he will not continue to live, the decision has to be made whether or not to give him that benefit, if available. But if he neither recovers sufficiently to be taken off it nor dies, the question will ultimately arise whether he should be kept on it indefinitely.

6. No minor of whatever age has power by refusing consent to treatment to override a consent to treatment by someone who has parental responsibility for the minor and a fortiori a consent by the court. Nevertheless such a refusal is a very important consideration in making clinical judgments and for parents and the court in deciding whether themselves to give consent. Its importance increases with the age and maturity of the minor.