Social Determinants in Clinical Decision Making: A Case of Mistaken Hepatic Encephalopathy.

Abstract

Implicit (i.e., unconscious) bias frequently differs from one's explicit or conscious convictions. As humans, we rely on information and experiences that are repeatedly reinforced until they become reflexive, shaping our perceptions of reality. Specialty bias, a form of implicit bias specific to an individual's medical specialty, is a form of this bias. These cognitive processes of making assumptions aid efficient decision-making and likely confers an evolutionary advantage. However, automatic thinking can contribute to stereotyping, prejudice, and discrimination at both explicit and implicit levels. Despite a person's explicit beliefs evolving, the lasting implicit bias significantly impacts their behavioral interactions with individuals from stereotyped groups. We present a case of an 83-year-old non-English speaking gentleman with a reported past medical history of an ischemic stroke who presented with acute encephalopathy and fever without jaundice and Aspartate transaminase/ Alanine transaminase (AST/ALT) of 64 and 34, respectively. He was initially treated for acute meningoencephalitis in the Neurologic Intensive Care Unit. With no clinical improvement in symptoms, his care was transferred to the Internal Medicine service later that week, and it was noted that he had features consistent with liver disease. Further history-taking revealed that the patient was intermittently confused with episodes of constipation. On examination, he had palmar erythema and asterixis, and additional labs showed elevated liver enzymes and ammonia levels. Computerized Tomography of the abdomen was suggestive of cirrhosis. He was treated for hepatic encephalopathy with lactulose and rifampin, with improvement in his mental status. We believe our patient's clinical diagnosis was compromised by incomplete information related to a language barrier, and anchoring biases prevented a thorough history taking from the patient family and later on from the patient. Physician's anchoring bias, a form of implicit bias, can negatively impact outcomes in patients, especially those with limited language proficiency, due to communication barriers leading to misunderstanding of the patient's clinical presentation and overreliance on clinical heuristics.