The Infectious Hepatitis page in the Abdominal disorders section has been updated with additional information on Hepatitis E following the recent NEJM review article on the subject.

Some additions have been made to the Supraventricular tachycardia and some related pages in the Resuscitation section following the publication of an NEJM review on the subject today.

A section on stroke in children and young adults has been added to the Stroke page in the Neurology section.

Additions have been made to the pages Acid Base Disorders, Blood Gas Analysis in the Clinical Skills section and the Arterial Access page in the Resuscitation section.

The Paediatric Head Trauma page in the Trauma section has been substantially revised, including the addition of the CHALICE paediatric head injury rules.

Additional information regarding the management of cardiac arrest in pregnancy has been added to the Advanced Life Support page in the Resuscitation section. Also a link from there to the Post Mortem Caesarean Section part of the Trauma in Pregnancy page in the Obstetrics section has been added.

A variety of additional information about the process of BLS / ACLS and Defibrillation have been added to the Life Support and Cardiac Arrythmias sections of the Resuscitation chapter.

This page in the Trauma section has been revised to include a better description of the populations to which each of the CT head decision rules apply and their strengths and weaknesses. A more detailed description of the New Orleans rule has been added.

Some additional tips on how to differentiate a pleural effusion/haemothorax from other pulmonary pathology or overlying soft tissue have been added to the Pleural effusion page in the Respiratory section. Additional links between the Thoracic trauma page (containing haemothorax and pneumothorax) in the Trauma section and the Pleural effusion and Penumothorax pages in the Respiratory section have been added due to the significant overlap of content.

Updates including how to differentiate pericarditis from Rheumatic fever have been added .

Some additional tips have been added to the Difficult IV Access page in the Resuscitation section.

The assessment and management of Otitis externa in the Head and Neck Disorders section has been updated.

18 new CXRs have been added to the CXR Gallery page.

A more detailed explanation of Cunningham’s shoulder relocation technique has been added to the Glenohumeral joint dislocation page in the Bone and Joint Disorders section.

A variety of updates to the Atrial fibrillation page in the Resuscitation section have been made.

A new section about effect size and approximation of appropriate sample size has been added to the Statistical power page in the Research Skills section.

An anatomical classification of lower limb DVT has been added.

Updated info regarding formation of gallstones and diagnostic accuracy of US following recently published review.

New information about how to differentiate ST elevation in LVH and STEMI from the recently published study in JACC added to the ECG in ACS section.

New explanation of how to calculate the QRS axis on a 12 lead ECG in the Electrocardiography section.

New section outlining the association between p wave dispersion and the progression to chronic Afib in the Atrial fibrillation section.

A new section and table relating to the use of the Delta gap in metabolic acidosis has been added to the Metabolic acidosis section.

A more detailed table of developmental milestones for children has been added as a new page link from “Developmental milestones” in the Assessment of Children section.

A table outlining the difference in the nature of contractions between true and false labour has been added to the Labour section.

Information about the immature platelet fraction and how it can help differentiate causes of thrombocytopenia has been added to the Thrombocytopenia section.

Updates information regarding the Geneva method of risk stratification based on clinical features and catheter embolectomy in the Management of PE section

Updated information about ST/S ratio and discordant ST elevation and depression and how it may add to the accuracy of the Sgarbossa criteria.

Updated Vertigo section, with information on how to differentiate BPV and vestibular neuronitis.