Marshall and Ruedy's On Call: Principles & Protocols, Australasian and UK 4th edition offers a carefully structured, risk-based approach to the initial assessment, investigation, differential diagnosis and short-term management of a wide variety of on-call ward problems. This fourth edition has been completely revised, with the addition of a new author, new chapters and updated content based on the latest evidence-based guidelines. The layout is in a succinct, easy-to-read format that outlines a practical, fast, efficient and effective bedside approach to clinical problem-solving on call. Clinical reasoning has never been made so explicit and exciting! * General principles: Overview of the professional, organisational, ethical and social traits required of the junior doctor on call * Emergency calls: Risk-stratified approach to life-threatening airway, breathing, circulation, neurological disability and environment factors (ABCDE) * Common calls: Explicit detail on how to deal with every call from urgent to non-life threatening, based on a standardised, reproducible clinical reasoning approach * Investigations: How to interpret an ECG, common imaging, acid base, electrolyte and haematological tests when on call * Practical procedures: How to perform a large array of practical procedures that may be needed when on call * Formulary: Quick reference for the indications, actions, adverse effects, cautions, doses and routes of administration of the vast array of drugs encountered in ward patients * Laboratory values: Normal values for all the common tests This edition includes the full eBook on eBooks+ with additional reading material, high-quality images, procedural videos and references available on https://litfl.com.