THE NORMALCY TRAP

What if correcting an abnormal number is sometimes the wrong treatment?In medicine, a blood pressure, oxygen saturation, creatinine, heart rate or glucose concentration cannot be understood in isolation. The same measurement may represent successful compensation in one patient, impending deterioration in another, or a physiological adaptation that could be harmed by forced normalisation.The Normalcy Trap challenges the assumption that returning a measurement to the population reference range necessarily improves outcomes. Drawing on cardiovascular medicine, critical care, renal physiology, respiratory medicine and metabolic disease, it develops a framework for understanding how biological state, individual baseline, physiological reserve and clinical trajectory determine the meaning of a number.Through worked clinical cases, landmark trials and the practical Normal-to-Adapted Bridge, the authors show how clinicians can distinguish statistical normality from biological appropriateness and therapeutic optimality.This is not a rejection of evidence-based medicine. It is a call to apply evidence with greater physiological precision and to make individualised targets reasoned, defensible and auditable.Written for physicians, trainees, intensivists, researchers and medical educators, this book offers a different way to approach clinical decisions: understand the patient before attempting to correct the measurement.The number is not the physiology. Understand the state.