…narrow neck. These findings may reflect plaque disruption or thrombus. A rounded or polypoid intraluminal mass and lesion haziness raise suspicion of thrombus, although haziness…

…clean with a tracheostomy or copious secretions Subclavian vein Most comfortable for the patient, the most stable dressing, lowest risk of infection and thrombosis with…

…cribriform plate into the cranium Absolute Corrosive injury of the oesophagus or stomach after ingestion of a caustic substance Absolute Choanal atresia or an occluded…

…symptomatic or large pneumothorax, recurrent malignant effusion (often combined with pleurodesis), and in chest trauma and postoperatively. Emergency needle decompression: a clinical suspicion of tension…

…A large venous cannula, preferably ≥7 cm, should be utilized. The cannula is inserted into the 4th or 5th intercostal space along the anterior axillary…

…Infection or burns over the puncture site. Osteogenesis imperfecta and severe osteoporosis (relative). An inability to identify the landmarks. Choice of vein and cannula size…

…first. Procedure Choice of insertion site The left lower quadrant is the first choice : the abdominal wall is thinner there than on the right, and…

…larger , since a mask that is too small leaks and gives a poorer seal. Procedure Insertion of the laryngeal mask 1. Check the mask, remove…

…mouthful of water and hold it. Advance the electrode at the very moment the patient swallows — the pharyngeal muscles then guide the tip into the…

…loss or large volume shifts. Patients in whom non invasive measurement is unreliable: marked obesity, pronounced vasoconstriction, arrhythmia, intra aortic balloon pump. Assessment of stroke…