An 80 year old woman is due for cataract surgery. There are no contraindications to regional anaesthesia so a peribulbar block was performed. 8mls of 2% lidocaine was injected using an infratemporal approach. However, there is still movement of the globe after 5 mins. The least likely extraocular muscle to develop akinesia is:
When describing the surface anatomy of the sacrum, which of the following anatomical landmarks refers to the base of an equilateral triangle is formed by the sacral hiatus?
A caudal anaesthetic block is planned for a 3-year-old girl presenting for inguinal hernia repair. Choose the best answer that explains why the caudal epidural space is accessed via the sacral hiatus.
A current flows through a simple electric circuit. Which of the following electrical component configurations has the greatest potential difference?
A transport ventilator is powered by an air/oxygen mix using a full oxygen cylinder (class CD) with an internal capacity of 2 litres, and pressure of 23,000 kPa, with a gas flow of 4 litres/minute. The ventilator also has a control resulting in an additional gas consumption of 1 litre/minute. How long will it take for the cylinder to empty?
Which statement most accurately describes the action of increasing the gain in ultrasound imaging?
When the volume of gas is measured, its value should be supported by a suitable abbreviation. From the following options, what does the STPD stand for?
From the following electromagnetic waves, which one has the shortest wavelength?
A 74-year-old with a VVI pacemaker is undergoing a hip replacement. Which of the following is most likely to predispose him to an electrical hazard?
You are preparing to anaesthetize a 27-year-old woman for an acute diagnostic laparoscopy to rule out appendicitis. She has no medical history and does not take any medications on a regular basis. You’re going to do a quick sequence induction. Which method of preoxygenation is the most effective and efficient?