Consideration - The directions
72There is little authority in this country as to the appropriate direction to be given to a jury on the issue of consent in what might be described as medical assault cases. However, as the applicant pointed out, in Rogers v Whitaker supra, the High Court drew a clear distinction between liability in a claim for negligence for failure to advise of risks inherent in a medical procedure and liability for the offence of battery.
73In Rogers v Whitaker, the High Court held that the law should recognise that a doctor has a duty to warn a patient of a material risk inherent in the proposed treatment; a risk being material if in the circumstances of the particular case a reasonable person, in the position of the patient, if warned of the risk, would be likely to attach significance to it, or if the medical practitioner is, or should be, reasonably aware that the particular patient, if warned of the risk, would be likely to attach significance to it: Rogers v Whitaker at 490.
74The High Court declined to adopt the approach suggested in Bolam v Friern Hospital Management Committee [1957] 1 WLR 582, to the effect that a medical practitioner is not negligent if he or she acts in accordance with the practice accepted by a responsible body of medical opinion and the extension of this principle to a failure to warn of risks by the majority of the House of Lords in Sidaway v Board of Governors of Bethlem Royal Hospital [1985] AC 871. However, the Court emphasised that its conclusions were not directed to the issue of whether or not a medical practitioner would be liable in trespass because of the absence of consent to a particular procedure. In that context the plurality made the following remarks:
"In this context, nothing is to be gained by reiterating the expressions used in American authorities, such as 'the patient's right of self-determination' or even the oft-used and somewhat amorphous phrase 'informed consent'. The right of self-determination is an expression which is, perhaps, suitable to cases where the issue is whether a person has agreed to the general surgical procedure or treatment, but is of little assistance in the balancing process that is involved in the determination of whether there has been a breach of the duty of disclosure. Likewise, the phrase 'informed consent' is apt to mislead as it suggests a test of the validity of a patient's consent. Moreover, consent is relevant to actions framed in trespass, not in negligence. Anglo-Australian law has rightly taken the view that an allegation that the risks inherent in a medical procedure have not been disclosed to the patient can only found an action in negligence and not in trespass; the consent necessary to negative the offence of battery is satisfied by the patient being advised in broad terms of the nature of the procedure to be performed. In Reibl v. Hughes the Supreme Court of Canada was cautious in its use of the term 'informed consent'." [Citations omitted]
75In reaching this conclusion the Court cited the judgment of Bristow J in Chatterton v Gerson [1981] 1 QB 432 with apparent approval. In that case Bristow J stated the consent necessary to defend a claim in trespass in the following terms:
"In my judgment once the patient is informed in broad terms of the nature of the procedure which is intended, and gives her consent, that consent is real, and the cause of the action on which to base a claim for failure to go into risks and implications is negligence, not trespass."
76In the judgment of the Court of Appeal in Sidaway [1984] 1 QB 493, each member of the Court adopted a similar approach (see at 511 per Donaldson MR, 515 per Dunn LJ and 518 per Browne-Wilkinson LJ. See also Freeman v Home Office [1984] 1 QB 524 at 537).
77The comments of their Lordships in each of these cases were consistent with what was said by the High Court in Rogers v Whitaker in the passage cited above.
78In Rogers v Whitaker the Court also cited with approval the decision of the Supreme Court of Canada in Reibl v Hughes [1980] 2 SCR 880. In that case the applicant at trial obtained damages in both battery and negligence for his surgeon's failure to advise him of the risk of paralysis following an operation. The applicant was ultimately successful on appeal but only on the issue of negligence.
79In the course of his judgment Laskin CJ, with whom the other members of the Court agreed, emphasised that the failure to disclose risks involved in a surgical procedure did not vitiate consent for the purpose of a claim in trespass. His Lordship also warned of the dangers of the use of the term informed consent, making the following remarks:
"In my opinion, these findings do not justify the imposition of liability for battery. The popularization of the term 'informed consent' for what is, in essence, a duty of disclosure of certain risks of surgery or therapy appears to have had some influence in the retention of battery as a ground of liability, even in cases where there was express consent to such treatment and the surgeon or therapist did not go beyond that to which consent was given. It would be better to abandon the term when it tends to confuse battery and negligence." (at [9])
80His Lordship also suggested that actions in battery should be confined to cases where no consent to the procedure was given by the patient or where the consent was obtained by fraud or misrepresentation. In that context his Lordship stated the position as follows:
"The well-known statement of Cardozo J. in Schloendorff v. Society of New York Hospital, at pp. 129-30 and at p. 93 respectively, that 'every human being of adult years and sound mind has a right to determine what shall be done with his own body; and a surgeon who performs an operation without his patient's consent commits an assault, for which he is liable in damages' cannot be taken beyond the compass of its words to support an action of battery where there has been consent to the very surgical procedure carried out upon a patient but there has been a breach of the duty of disclosure of attendant risks. In my opinion, actions of battery in respect of surgical or other medical treatment should be confined to cases where surgery or treatment has been performed or given to which there has been no consent at all or where, emergency situations aside, surgery or treatment has been performed or given beyond that to which there was consent.
This standard would comprehend cases where there was misrepresentation of the surgery or treatment for which consent was elicited and a different surgical procedure or treatment was carried out." (at [11]-[12])
And
"I can appreciate the temptation to say that the genuineness of consent to medical treatment depends on proper disclosure of the risks which it entails, but in my view, unless there has been misrepresentation or fraud to secure consent to the treatment, a failure to disclose the attendant risks, however serious, should go to negligence rather than to battery. Although such a failure relates to an informed choice of submitting to or refusing recommended and appropriate treatment, it arises as the breach of an anterior duty of due care, comparable in legal obligation to the duty of due care in carrying out the particular treatment to which the patient has consented. It is not a test of the validity of the consent." (at [13])
81These cases, in my opinion, make it clear that a failure to explain to a patient the possible risks involved in a procedure, however material, will not lead to the conclusion of an absence of consent for the purpose of criminal proceedings or the tort of trespass.
82It should be accepted that consent requires more than mere formalistic acquiescence to the proposed medical procedure. In order for a patient to be taken to have consented they must have been informed, in broad terms, of the nature of the procedure, in terms which they have understood: Mulloy v Hop Sang [1935] 1 WWR 714 at [1]. Merely having the patient sign a consent form for example, is insufficient: Chatterton supra at 443. Further, it is uncontroversial that a patient's consent only extends to the medical procedure explained to them. This includes the physical act to be undertaken and the extent of interference with the body proposed. If some other medical procedure other than that agreed to is performed, or the treatment or procedure goes beyond what is consented to, then there has been no relevant consent: Chatterton supra at 443; Mulloy v Hop Sang supra at [2]; Winn v Alexander [1940] O.W.N. 238; Reibl v Hughes supra at [11]-[12].
83The reasoning in Rogers v Whitaker, Chatterton v Gerson and Reibl v Hughes has not, to my knowledge, been challenged in this country, the United Kingdom or Canada. In Appleton v Garrett [1996] PIQR P1, Dyson J, as his Lordship then was, quoted with approval the judgment of Bristow J in Chatterton v Gerson supra, endorsing the proposition that once a plaintiff is informed in broad terms of the nature of the procedure which is intended and gives her consent, the consent is real unless information is withheld in bad faith or the consent is vitiated by fraud ([1996] PIQR P1 at 3). His Lordship did not elaborate what he meant by withholding information in bad faith but his remarks were made in the context of a factual finding that the defendant dentist deliberately withheld information from his patients that the treatment he proposed was unnecessary because he knew they would not have consented had they known the true position. In that context, irrespective of the issue of consent, criminal liability would arise because the Crown would be able to establish beyond reasonable doubt that the dentist did not honestly believe that the operation was proper surgery for the patient's benefit.
84In McDonald v Ludwig [2007] QSC 28, Muir J, whilst citing the passage in Rogers v Whitaker supra to which I have referred, held that consent to a procedure for a specific purpose did not operate as a consent to perform the same or similar acts for a different or unrelated purpose (see [2007] QSC 28 at [88]). It is not necessary in the present case to consider whether that statement is correct in the context of criminal proceedings.
85Once it is accepted that consent is not vitiated by a failure to disclose risks inherent in the procedure it follows in my view that a failure to explain alternative treatments would not operate to vitiate consent. That is because decisions as to which treatment option is most appropriate are generally based on a consideration and weighing of the relative risks of alternative treatments. Further, a doctor's obligation to choose between alternative treatments is fundamentally bound up with a medical practitioner's professional duty of treatment and diagnosis. It is quite distinct from the obligation to provide information, to which the question of consent relates: Richards v Rahilly [2005] NSWSC 352 at [223]-[235]; Eagle v Prosser [1999] NSWCA 166. Whether or not such a failure could amount to a breach of a duty of care such as to give rise to a liability in negligence (see Eagle v Prosser supra at [36]-[38]; Richards v Rahilly supra at [230]-[231]), such a failure would not vitiate consent for the purpose of criminal liability.
86In these circumstances, any direction to the jury on this issue should be to the effect that the accused will not be guilty of assault unless the Crown proves beyond reasonable doubt that the complainant has not consented to the nature and extent of the procedure and that the doctor does not honestly believe that she has so consented. The only exception is where consent is vitiated by fraud or misrepresentation. Expressions such as "informed consent" or "real consent" should be avoided as, in my opinion, they tend to obscure the difference between criminal and civil liability in this area.
87In the present case it is not necessary to decide the difficult question whether consent to the nature of the procedure can be given in circumstances where the patient is not aware of the inevitable consequences of the procedure as distinct from potential risks associated with it. (See Somerville "Structuring the Issues in Informed Consent" (1981) 26 McGill LJ 740.) In many cases such consequences will be readily apparent but there will be cases where they are not. As no argument was directed to this issue, it is unnecessary to express any view on it.
88It follows, in my opinion, that the trial judge misdirected the jury both in his written directions, orally and in answering the question posed by the jury in the course of their deliberations. I have set out the directions earlier in this judgment (see pars [56]-[61] above). The initial part of the direction, namely "there will not be lawful cause or excuse for the surgery performed by the accused if the Crown proves beyond reasonable doubt that the accused did not honestly believe at the time of the operation that the patient had given her informed consent to the full extent of the operation including removal of the labia and clitoris", may not have constituted a misdirection although the word "informed" tends to obscure the issue. However, the reference in the definition of informed consent to the requirement of an explanation of the possible major consequences of the operation and of any options of alternative treatment which may be reasonably available potentially had the consequence that the jury could convict on the basis that, although the complainant was informed of the nature of the operation, she was not informed of the risks or alternative treatment and that in those circumstances the Crown had established beyond reasonable doubt that the applicant did not honestly believe he had obtained the complainant's consent. The same difficulty arises with the oral direction and the answer to the question asked by the jury.
89It follows that unless this is an appropriate case for the operation of the proviso, there should be a retrial.