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BMJ 2003;327:1011 (1 November), doi:10.1136/bmj.327.7422.1011
Trevor Thompson, clinical lecturer1, Rosaline Barbour, professor of health and social care2, Lisa Schwartz, professor of health care ethics3
1 Division of Primary Health Care, University of Bristol, Bristol BS6 6JL, 2 School of Nursing and Midwifery, University of Dundee, Dundee DD1 4HJ, 3 Department of Clinical Epidemiology and Biostatistics, McMaster University, 1200 Main Street West Hamilton Ontario, Canada L8N 3Z5
Correspondence to: T Thompson trevor.thompson{at}bristol.ac.uk
Design Qualitative study.
Setting Scotland.
Participants Interviewees (n = 12) comprising general practitioners, hospital specialists, and nurses, and six focus groups (n = 34 participants) comprising general practitioners, geriatricians (consultants and specialist registrars), hospital nurses, and hospice nurses.
Results When presented with an advance directive that applied to the same hypothetical scenario, health professionals came to divergent conclusions as to the "right thing to do." Arguments opposing treatment centred on the supremacy of autonomy as an ethical principle. Other arguments were that the decision to treat was consistent with the terms of the advance directive, or that, notwithstanding the advance directive, the patient's quality of life was sufficient to warrant treatment.
Conclusion Advance directives are open to widely varying interpretation. Some of this variability is related to the ambiguity of the directive's terminology whereas some is related to the willingness of health professionals to make subjective value judgments concerning quality of life.
Particular difficulties arise when a critically ill patient is cognitively impaired. Here the health professionals and relatives engage in "soft" paternalism, making decisions in the best interests of the incapacitated patient.5 The premorbid verbal testimony of the patient can be included, with the lay carer acting as a healthcare "proxy."6
It is in this context that the advance directive is cited as a means of promoting patient autonomyproviding a written statement of treatment preferences made when the patient was in sound mind. But do these documents really uphold the stated preferences of the now incapacitated patient? One prospective study showed that in most cases advanced directives were not consulted by carers in critical care situations.7
Work from the United States has shown that advance directives have no effect in improving the accuracy of substituted judgments by proxies (friends or relatives).8 No equivalent studies have specifically examined the effect of advance directives on health professionals' decision making, although there is work on their views and experiences.9 10 When faced with an advance directive in a critical care scenario what decisions are made and how are these justified?
To approach this question we elicited health professionals' responses to a critical care vignette of a fictitious patient who had previously signed an advance directive (box 1). The vignette was constructed to highlight the ethical dilemmas that arise when implementing advance directives in the clinical setting.
The quota for the prospectively defined sample was met through a variety of established methods, including the use of "key informants." For instance, information from a campaigner for voluntary euthanasia led to the inclusion of two participants who had opposed each other in a public debate. We conducted 12 interviews and six focus groups. The focus groups comprised consultants and specialist registrars in medicine for elderly people, nurses, general practitioners, and hospice staff. Tables 1 and 2 show the characteristics of the participants.
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Participants were provided with a hypothetical advance directive, constructed after analysis of three documents (box 1). An analysis based on a general discussion of this advance directive has been written up elsewhere.12 Participants were then shown a critical care vignette relating to the patient, who had written the advance directive before developing dementia (box 2). They were asked what they believed was the "right thing to do."
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All interviews and focus group discussions were recorded on MiniDisc, transcribed verbatim, and analysed according to a modified grounded theory approach.13 Preliminary coding categories were derived from the topic guide but were refined to take account of the issues raised by participants, with earlier transcripts being systematically revisited in light of these new categories.14 Most of the coding was carried out by TT, but RB and LS independently coded the transcripts of one focus group and one interview, and our various interpretations are compared from the perspectives of clinician, sociologist, and ethicist.15 We analysed data with Atlas.ti.16
I think the thing about the will is a complication because if she hadn't written the will I would definitely treat her. (Female general practitioner, mixed group; No 23)
No participant said that they would withhold treatment in the absence of the advance directive. The hypothetical advance directive stated, however, that "with the development of any life threatening medical situation I should not be given active treatment such as antibiotics."
As anticipated, this scenario created division of opinion. Six of the 12 interviewees (three nurses and three doctors) said that they would not treat the patient with antibiotics, whereas five (all doctors) said that they would. The position of one of the interviewees was unclear. Opinion was also equally divided between and within focus groups.
How did the respondents justify their different positions? Before examining this question some important additional factors in the decision making process are presented.
Factors in decision making
Many thought the right thing to do was to get more information from as many sources as possible. Three of the four interviewees who mentioned the need to try and communicate directly with the patient were nurses. The following is a response to the initial question of the "right thing to do":
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I think to discuss with [the patient] what her wishes are, to read the advance directive, to speak to both the daughters if possible and to speak to the nursing team, and to read her notes." (Female hospice nurse, interviewee; No 43)
In all 12 interviews, reference was made to the need to engage the family in the discussion. This consideration highlights the limitations of the vignette based approach, where participants' decisions are constrained by limited informationthe "it depends" response.17 The general practitioners were keen to be able to draw on their knowledge of the patient in sound mind. Another issue was whether or not the patient would require intravenous antibiotics. Some would likely have stopped short of transfer to hospital.
Notwithstanding this missing information, what reasoning did participants put forward to explain their decision making? Those who would treat the patient constructed two main types of argument. Firstly they argued that treatment is wholly consistent with the terms of the advance directive and secondly that to follow the directive would be to go against the best interests of the patient. Withholding treatment was justified primarily on the grounds of respecting autonomy. Box 3 summarises the reasons for and against treatment.
Arguments why treating is consistent with advance directive
The most commonly presented justification for treatment was that the patient's dementia did not constitute "severe degenerative brain disease." This was put forward by half the interviewees and one in four of the focus group participants:
It's my clinical judgment that she doesn't have severe degenerative brain disease, that's she's got mild to moderate degenerative brain disease, and therefore the terms of a directive don't qualify. (Male general practitioner, interviewee; No 35)
This is clearly a question of interpretation, with some participants arguing that a condition that renders the patient unable to read or converse should be judged severe, especially in light of its progressive nature. The next most common argument was that the use of antibiotics is justified as a means of symptom control (as opposed to a means of preventing death):
This comes under the idea of humane nursing and care... because although pneumonia may sometimes be silent in that kind of situation, it quite often isn't. It can be quite unpleasant. (Female general practitioner, interviewee; No 37)
In five interviews and two focus groups the presenting complaint was considered not necessarily life threatening. The patient might survive her untreated pneumonia and be left in a state of ongoing respiratory distress and worsening cognitionthe very state that she wanted to avoid in signing the directive:
Very often you're treating not the condition as it is now but the condition as it will be if we don't. (Male geriatrician, retired, interviewee; No 38)
Arguments why advance directive should not be followed
The preceding arguments are couched as legitimate interpretations of the advance directive. However most of the arguments in favour of treating centre on the view of the patient as having, despite her dementia, a reasonable quality of life that is intrinsically worth preserving regardless of the advance directive:
I'd give her penicillin, I really would, regardless of her living will. I think I can defend that. She is clearly not unhappy in any obvious sense. Her daughter who comes and visits her every week is probably giving her something, who can say? (Male general practitioner, general practitioner group; No 10)
According to this argument, while acknowledging the existence of the advance directive, the carer has a duty to reflect on what the patient would really want to happen to her in this scenario, with the feeling that her current state is not the one she had in mind when drafting it:
Now, I don't mean, wilfully, to reinterpret this in the view of what I want to do... but, at the same time you have to be sympathetic to what she really meant when she wrote this. (Male surgeon, interviewee; No 36)
This is a matter of individual judgment. Participants were pressed to explain their view that the patient had a reasonable quality of life (box 4). Some participants warned against reliance on such interpretations:
The point is that that's your interpretation. Here we come back to the same problem, "quality of life is not bad." Who says so? The doctors. (Male anaesthetist, interviewee; No 40)
Many participants found it difficult to balancing subjective impressions of the patient's quality of life against her expressed desire for autonomy. This was evidenced by lengthy debates resulting in two focus group participants changing their points of view in the course of discussion. Several of those who thought that the patient's quality of life warranted treatment, discussed how they would use the ambiguity of the advance directive to justify their treatment choices:
I feel in [the patient's] view this is probably the situation where she would want that [the advance directive] enacted. I think as a doctor I could let myself out of this by saying she is not severely demented at all, treat it and then we will ask questions afterwards. (Female specialist registrar, specialist group; No 31)
Arguments for withholding antibiotics
The primary argument for withholding treatment was respect for autonomy. Those who would not treat argued that the patient had lived a full life and had put thought into how she would like her end to be. She had taken the trouble to draft an advance directive, discussed its contents with a doctor, and distributed it to various parties, including her solicitor. These protagonists argued that she had a severe and irreversible degenerative brain disease, was unable to participate in decisions about her care, had an acute life threatening illness of the type she was thinking of when she wrote her advance directive, and had specifically refused treatment with antibiotics in such a scenario:
Make her comfortable, I mean she made this statement eight years ago when she knew exactly what she wanted... she can't read anymore, her intellect has gone, I would think that at 70 years old this is what she wouldn't want so... keep her comfortable. (Female ward manager, nurse group; No 1)
To treat her, they argued, would be in direct contradiction of the patient's clearly expressed wishes. Furthermore, any argument for treatment based on a lay or professional carer's perception that she was "happily demented" could be seen as no more than the projection of one person's set of values on another. Even if her dementia were not far advanced, it inevitably would become so. It was the patient's wish to avoid interventions at this stage so that she might be spared the indignity of further decline into imbecility. Thus, to treat her was to consign her to a future she had hoped to avoid. This line of thinking depended on the pneumonia being life threatening: non-treatment might have the reverse of the intended effect.
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Legal implications of decision making in scenario
In the United Kingdom there is no statutory law relating to advance directives, although such laws do exist in several countries. UK case law has established guidance for the creation of advance directives, but the obligation of doctors to follow them has not yet been tested in the courts.18 Several participants were boldly dismissive of the legal status of the advance directive:
It has none, no status at all. (Female general practitioner, interviewee; No 39)
Others expressed uncertainty. All those who would treat the patient thought they could justify their decisions with reference to the ambiguities. Although four participants cited the potential value of advance directives in offering legal protection to the doctor who went against a family by withholding treatment, only one participant was in favour of statutory legislation. The following is from a participant who was positive about advance directives:
I think that the medicine and the law are very uneasy bedfellows. I think that [legislation] would be a most retrograde step simply because the law is about certainties and medicine is very much about uncertainties. (Male general practitioner, interviewee; No 35)
Most of the participants came from greater Glasgow, and it is possible that the findings were influenced by regional culture. Given the sampling methods, it is unlikely that these participants were representative of UK health professionals. However, the attitudes expressed were broadly consistent with those from a 1997 survey of general practitioners in the West of Scotland.19 The findings relate to a specially constructed advance directive and cannot be directly transferred to any of those currently in regular use. The clinical vignette was an effective stimulus to discussion and allowed a comparison of decision making between participants. But the vignette offers only an approximation of the multifactorial arena of decision making in the real world, in which input from staff and relatives and previous knowledge of the patient all play a part in influencing professionals' actions.
We conclude that advance directives are open to different interpretations and that anyone creating one cannot assume that any particular outcome will result from its implementation. Outcome depends to a great extent on who deals with the advance directive. This is the sort of reasoning that lies behind the drive for legislation to make advance directives binding on health professionsa move recently rejected in the United Kingdom by the House of Lords.20 However, given the ambiguous nature of terminology used in advance directives, it seems unlikely that successful prosecution could proceed, with the legal profession trying to interpret terms such as "life threatening," "irreversible," and "futile."
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One weakness of advance directives of this sort is that they give little information about what in the patient's view constitutes a good quality of life. Such information might make decisions faced by health professionals easier. Increasing attention has been applied to the use of "values histories" for this purpose.21 They identify "core values and beliefs in the context of terminal care that are important to the patient." They might, for instance, place a premium on remaining at home or on "buying time" so that distant loved ones can visit.
Our study emphasises the central role for clinical judgment in critical care decision making.22 Advance directives will not lessen the responsibility of health professionals to weigh up a range of conflicting considerations. In so doing they should seek to synthesise their scientific knowledge with an appreciation of the patient's individual predicament. Arguably what some of the participants lacked was a willingness to step outside their own values systems in fully embracing that of the patient. Medical education should seek to development students' empathic skills, and scenarios such as this could be used for this purpose.23
As seems to be the case with lay carers, advance directives may have limited ability to influence decision making by health professionals on end of life, although they may exert other important benefits by opening dialogue and conferring peace of mind.8 24
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Contributors: TT had the original idea for the study, collected the data, and was responsible for the overall running of the project; he will act as guarantor for the paper. RB was the research supervisor and was intimately involved in all stages of design and analysis. LS was involved in the design of the study and was particularly responsible for advice on ethical concepts. All authors contributed to the writing of the manuscript.
Funding: The empirical work for this paper was undertaken while TT, RB, and LS were based at the Department of General Practice, University of Glasgow, and TT was funded by the Scottish Office as a higher professional training fellow. This study was supported by a grant from the Scientific Board of the Royal College of General Practitioners. The guarantor accepts full responsibility for the conduct of the study, had access to the data, and controlled the decision to publish.
Competing interests: None declared.
Ethical approval: At the time the study was carried out (November 1999 to February 2000) it was not a formal requirement to obtain ethical approval for non-interventional research with health professionals. All participants gave signed consent.
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