CICM SAQ 2010.1 Q22
Questions
22.1. What piece of equipment is shown below? Outline the principle of operation of this equipment.
22.2. The following image shows the connector and a regulator for a Medical Wall Suction outlet.
- (a) What design features of the above equipment prevent it from being connected to the oxygen outlet device?
22.3. The image below is an example of a rapid volume infusion device.
- (a) What are the major determinants of fluid flow through this device?
Answers
Answer and interpretation
22.1. What piece of equipment is shown below? Outline the principle of operation of this equipment.
Non-rebreather or partial rebreather oxygen mask
- Reservoir bag attached to FGF
- One way valve between reservoir bag and patient which prevent expired gas entering the reservoir bag.
- Usual FiO2 reached is between 60-90%.
- Achieving 100% FiO2 is difficult because of valve inefficiency and lack of a tight fit around the face thus entraining room air.
22.2. (a) What design features of the above equipment prevent it from being connected to the oxygen outlet device?
- Colour coding (oxygen is white, suction is yellow)
- A unique sleeve index arrangement for each wall gas
22.3. (a) What are the major determinants of fluid flow through this device?
- Pressure gradient, radius of the catheter raised to the power of 4 (r4) and length of the catheter.
- As described by the simplified Poiseuilles formula for laminar flow through tube:
Flow α ∆ρ.r4/l
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CICM
Chris is an Intensivist and ECMO specialist at the Alfred ICU in Melbourne. He is also a Clinical Adjunct Associate Professor at Monash University. He is a co-founder of the Australia and New Zealand Clinician Educator Network (ANZCEN) and is the Lead for the ANZCEN Clinician Educator Incubator programme. He is on the Board of Directors for the Intensive Care Foundation and is a First Part Examiner for the College of Intensive Care Medicine. He is an internationally recognised Clinician Educator with a passion for helping clinicians learn and for improving the clinical performance of individuals and collectives.
After finishing his medical degree at the University of Auckland, he continued post-graduate training in New Zealand as well as Australia’s Northern Territory, Perth and Melbourne. He has completed fellowship training in both intensive care medicine and emergency medicine, as well as post-graduate training in biochemistry, clinical toxicology, clinical epidemiology, and health professional education.
He is actively involved in in using translational simulation to improve patient care and the design of processes and systems at Alfred Health. He coordinates the Alfred ICU’s education and simulation programmes and runs the unit’s education website, INTENSIVE. He created the ‘Critically Ill Airway’ course and teaches on numerous courses around the world. He is one of the founders of the FOAM movement (Free Open-Access Medical education) and is co-creator of litfl.com, the RAGE podcast, the Resuscitology course, and the SMACC conference.
His one great achievement is being the father of three amazing children.
On Twitter, he is @precordialthump.
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