The more one studies the clinical expert,
the more one marvels at the complex and multidimensional
components of knowledge and skill that
she or he brings to bear on the problem, and the
amazing adaptability she or he must possess to achieve the
goal of effective care.
G. Norman 
1. Multimorbidity: What Do We Know about the Current Challenges?
Multimorbidity, or co-occurrence of several chronic diseases, is of increasing importance for healthcare professionals    . According to recent studies, patients suffering from multi-morbidities represent 52.1% of the patients who consult their general practitioner (GP) in Switzerland compared to 52.9% in England. We can find similar figures in Canada (more than 50% of patients)  . The prevalence increases with age and socioeconomic deprivation   . The management of patients with multiple morbidities presents specific challenges to clinicians, as there is some evidence that patients with multimorbidity receive a lower quality of care than those with single diseases   ; for example, the multiplicity of medication, the contradicting applications of certain guidelines, the frequent medical tests and appointments which might impinge on the patient’s quality of life   .
There is a large literature on the issues of multimorbidity, in relation to the patient, the healthcare system and the clinician. Multimorbidity can affect the patient’s quality of life, or require complex multi-drug therapy treatment plan, including the management of side effects  . It can impact the healthcare system in terms of costs and allocation of resources   . For the clinicians, researchers have explored implementing Shared Decision Making and interprofessional collaboration with the different specialists to ensure care continuity and coordination, as well as how to deal with the longitudinal uncertainty  -  .
Studies have highlighted GPs’ and Healthcare professionals’ perceptions and experiences when it comes to such clinical challenges   . Sinnott et al. published a systematic review on the perceptions of GPs on the clinical management of multimorbidity: results show that the problems may be classified into four domains: disorganisation and fragmentation of healthcare; inadequacy of guidelines and evidence-based medicine; challenges in delivering patient-centred care; and barriers to Shared Decision Making  .
2. What about GPs and Healthcare Professionals’ Clinical Reasoning?
Reasoning processes are intrinsically involved in these domains of specific difficulties. This is exemplified by the use of guidelines, which are “generally written for sole conditions”  ; many doctors feel they need to be able to interpret guidelines in the context of individual patients. This will allow them to reach a compromise by following guidelines and accommodating patient factors, such as patient preferences or the patient’s ability to tolerate medication  . Nevertheless, many of them think that this change comes in conflict with what is seen as the “best practice” and therefore may feel guilty when they don’t enforce guidelines   .
Another example of reported difficulty lies in clinicians’ response to the complexities of Shared Decision Making: GPs tend to employ a range of techniques including prioritization of the doctor’s or the patient’s agenda   , avoidance of decision-making  , solely drawing on one’s own personal experience  , or using additional investigations to support a decision  . All these strategies may be worthwhile, but can also suffer from biases, leading to over- or underestimate the different components of the clinical situation, eventually resulting in flawed assessment and decision errors.
Papers relating more specifically to the theories on clinical reasoning barely refer to chronic or multimorbid conditions. Indeed, in medicine, “reaching the diagnosis” is often times treated as the goal of clinical problem solving  ; given this perspective, there is a consensus in the literature about the concept of a dual process of reasoning playing simultaneously and involving an immediate, intuitive approach, and a more conscious, analytical one. The spontaneous solutions emerging from the intuitive process may be challenged by the analytical one: the data at hand are interpreted to assess their fit with each hypothesis, so that each hypothesis is verified and may be rejected, maintained, or further tested with the acquisition of additional clinical information until a diagnosis is reached      .
Ilgen et al. have suggested different potential reasons leading to this focus on diagnostic clinical reasoning, such as the satisfaction of having successfully met the challenge to find the diagnosis, what they call the “aha feeling”, or the fact that “making a diagnosis” is in itself a way to organise and structure one’s thinking process  . It would be worthwhile to note, however, that this cognitive approach of the clinical reasoning processes may minimise or not give sufficient consideration to the potential role of the patient, of the other implicated healthcare professionals, of the context, and of the resulting interactions between them  .
Even if research attempting to understand the nature of clinical reasoning has been under way for nearly four decades, we still know very little about how clinicians actually weigh up the many factors—medical, social, and psychological—to reach a particular course of action  . And this is particularly the case for the monitoring of multimorbid patients. Taking care of patients with multi-morbidities and the resulting longitudinal follow-up lead us to consider that clinical reasoning continues beyond diagnosis and also includes clinical reasoning processes regarding the selection of purposeful actions, (e.g. the choice of investigations or treatments,), the implementation of alternatives strategies (e.g. Shared Decision Making, collaborative reasoning with healthcare professionals, etc.), the monitoring and evaluation of the results  .
An emerging literature relates to these processes, calling them therapeutic reasoning  , or management reasoning  . Cook et al. recently tried to describe the key differences between diagnostic reasoning and management reasoning  : diagnostic reasoning can be established as correct or incorrect whereas in management reasoning, the answer often depends. Diagnostic reasoning is not influenced by the patient’s values or preferences, which is not the case for management reasoning. Diagnostic reasoning can often be done in isolation from the patient whereas management reasoning requires the involvement of patients and healthcare professionals. Diagnostic reasoning is assigned at a given point in time, whereas management reasoning requires ongoing monitoring and frequent adjustments. Diagnostic reasoning requires a definite range of solutions whereas management reasoning involves a dynamic interplay amongst people, systems, settings, and competing priorities   . Table 1 is inspired from the articulation of the key differences noted by Cook et al. and exemplifies how these differences come into play during the care of patients suffering from multimorbidity.
3. Current Implications for Teaching and Supervising
Despite the recent studies, management reasoning remains less understood. In order to be able to identify the risks of errors or potential difficulties, we need to better understand the clinical reasoning processes of clinicians engaged in management reasoning. Studies, such as that conducted by Graber, showed that the most common cognitive problems involve faulty synthesis  . Premature closure, (i.e., the failure to continue considering reasonable alternatives after an initial diagnosis was reached), seems to be the single most common cause. Contrary to what one might think, faulty or inadequate knowledge is uncommon  . Our own research with physicians involved with multimorbid patients suggests that other difficulties of clinical reasoning may also arise in management reasoning, such as difficulties in prioritizing (i.e., difficulty in focusing on the clinical case’s most important aspects, or difficulty in appropriately choosing when to ascribe significance to cues or data obtained during the encounter)
Table 1. Clinical reasoning and multimorbidity: main differences.
or difficulties in building an overall picture of the clinical situation (i.e., failure to make connections between the different pieces of information, failure to integrate the patient’s perspective and contextual factors to build a picture of the clinical situation and adjust his/her investigation or management plan)   . Other results suggest that clinical inertia, (i.e., failure of clinicians to initiate or intensify therapy when indicated) might be a major problem, for example in the management of hypertension; this could be more prevalent in elderly patients  .
The effort to understand these processes may also support clinical training and supervision. As a matter of fact, supervisors should focus not only on the results of learners’ clinical reasoning, but also on the processes and the context at stake for a particular case   . Multimorbid patients follow up makes the clinical reasoning supervision and teaching more challenging; more than often, trainees struggle to cope with complexity and uncertainty, trying to avoid cognitive overload, which could lead them to inefficiency, cognitive shortcuts and errors, and/or frustration  . Nevertheless, dealing with complexity is part of the competencies trainees have to acquire  .
Clinical supervisors must therefore acquire an understanding of clinical reasoning coupled with strong pedagogical skills to be able to articulate their findings to their learners and foster the development of strong clinical reasoning processes   .
4. Developing Collaborative Care amongst Health Care Professionals: A Response to the Challenges Ahead
Patients with chronic or multimorbid conditions also make daily decisions for their self-management without support from their healthcare providers. This reality introduces an additional chronic disease paradigm: the patient-professional partnership, involving shared decisions, collaborative care and self-management education  . Facing the challenge of meeting the complex needs of patients and their families, “medical care must be transformed into a more proactive, holistic, and collaborative model”  , involving patients and their relatives, as well as different healthcare providers in an interprofessional approach. This interprofessional approach could also include collaborative reasoning  .
Current care conceptualizations suggest that challenging cases as the ones with multi-morbidities provide clinicians and healthcare professionals with opportunities for personal growth through collaboration with colleagues, allowing them to identify new solutions through innovations in practice   . Both research and teaching have a lot to gain from fostering collaboration between different disciplines. In this perspective, methodology for future research should include GPs and healthcare professionals dealing with multimorbid patients as well as patients themselves.
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