Front Page - Exercises in Clinical Reasoning
Teacher’s GuideSlide 2:-S1 (Ref 1)-Define: intuitive, quick, reflexive, dependent on pattern recognition-Example: A patient recently treated with antibiotics who presents with diarrhea, abdominal pain, and leukocytosis likely has … (then click) … C. difficile colitis-Invite trainees to share examplesSlide 3:-S2 (Ref 2)-Define: slow, analytical, and deliberate-Discuss example: A patient with no clear risk factors presents with chronic diarrhea, abdominal pain, and leukocytosis – the differential includes infection (i.e. community acquired C. diff), a noninfectious inflammatory cause (i.e. IBD), malignancy (i.e. GI tract lymphoma), malabsorption (i.e. pancreatic insufficiency)-Invite trainees to share examplesSlide 4:-Clinicians alternate between System 1 and System 2 thinking—known as dual process theory of cognition -Discuss when a clinician might transition from S1 to S2 reasoning (Ref 3): For example, an obese middle-aged woman presents with colicky RUQ pain; initially this presentation activates pattern recognition and consideration of acute cholecystitis, however, ultrasound rules out this diagnosis. The clinician should step back (transition to S2) and consider other diagnoses.Slide 5:BlankSlide 6:-Request trainees describe whether their initial differential involved using S1 and/or S2 reasoning-S1 reasoning for someone with chest pain includes ACS, PE, and aortic dissection-The radiation to the left leg might cause the students to pause and activate S2 reasoning. (Only make explicit if students actually comment)-Ask a trainee what they would focus on during the physical exam. This question forces the trainee to consider how a focused physical exam might impact the differential being considered.Slide 7:-Have trainee interpret physical exam and discuss next steps in management-Ask: “What labs and imaging would you order, and why?” Keep forcing the trainees to think aloud. Slide 8:-Invite a trainee to interpret laboratory data and describe whether/how this review impacts his or her initial differential diagnosisSlide 9:-Invite a trainee to interpret the EKGKey-Electrocardiogram on presentation to the emergency department. Note sinus rhythm, rate of 57 per minute, PR interval of 160 ms, QRS duration of 78 ms, and symmetric T wave inversions in leads V3 through V6 with evidence of left ventricular hypertrophy Slide 10:-Invite a trainee to interpret the CXR-Describe the non-con head CT results (demonstrated old lacunar infarcts in the bilateral basal ganglia)Key:-Chest radiograph in the emergency department (portable) revealed clear lung fields, possible cardiomegaly, a tortuous aorta, and possible widened mediastinum.Slide 11:-Explore how data that is inconsistent with initial diagnosis (often activated using pattern recognition) can be a trigger to slow down and utilize analytic/System 2 thinking -After above questions, ask a trainee discuss his/her next steps in management (both diagnostically and therapeutically) and which unit they would admit the patient toSlide 12:BlankSlide 13:BlankSlide 14:-After discussion of questions above, ask a trainee to discuss his/her next steps -Consider asking trainees to reflect on how they feel about this management decision (treatment team may be too tied to their initial diagnosis, may not have recognized clues that the patient’s presentation did not fit with this diagnosis)Slide 15:BlankSlide 16:-Coronal image from the computed tomography angiogram of the chest, demonstrating a Sanford type A aortic dissection extending down the length of the thoracic descending aorta. -Transverse image from the computed tomography angiogram of the chest, demonstrating the involvement of the left main coronary artery and the aortic valve annulus. The dissection flap in the descending aorta is also seen. Slide 17:- Pause for reflections from trainees after revealing this infoSlide 18:-Utilize the above questions to stimulate critical thinking and reflection from trainees, concepts to consider include:-Noting a lack of fit between the presumed diagnosis and prominent symptoms or signs in the case (i.e. does the diagnosis explain all of the patient’s major clinical findings?)-Being aware of when we have limited knowledge of a particular diagnosis (i.e. we haven’t had significant experience to know clinical variations that might appear)-Might ask trainees to reflect on their own experience – have there been times when they were slow to make a needed switch between System 1 and 2?-Like most models, the Dual Process Theory oversimplifies reality. In real-world practice, a clinician’s reasoning process is unlikely to fall exclusively into either category, but rather oscillates between the two, even within a single caseSlide 19:-6 causes of life threatening, acute chest pain: acute coronary syndrome, pulmonary embolus, aortic dissection, pneumothorax, esophageal rupture, and tamponadeSlide 20:BlankSlide 21:Blank ................
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