Anaes Vivas · Breathing systems & circuits
Equipment viva — breathing systems, circle checks and absorbent safety
An equipment viva on breathing systems — the per-system per-mode fresh gas flows (Magill at minute ventilation, Bain at 1.5 to 2 times, T-piece at 2.5 to 3 times spontaneous), the Bain inner-tube tests with the under-20-kg exclusion, the AAGBI two-bag and 20 to 60 cmH2O leak tests, and the strong-base absorbent story with the inspired-CO2 change rule.
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Target exams
ANZCAFRCAABAEDAICFCAIFCA_SA
Prompt
A Bain circuit, a Jackson-Rees T-piece and a circle absorber assembly on the viva table. Compare the Mapleson systems by efficiency, demonstrate the circle leak checks, and explain when the absorbent must be changed.
Stimulus
A Bain circuit, a Jackson-Rees T-piece and a circle absorber assembly on the viva table. For each: name the arrangement, state the flow that prevents rebreathing, and show the bedside checks. Finish with when the absorbent gets changed.
References5ShowHide
- [1]Feldman JM, Hendrickx J, Kennedy RR. Carbon Dioxide Absorption During Inhalation Anesthesia: A Modern Practice. Anesth Analg, 2021.PMID 32947290
- [2]Parthasarathy S The closed circuit and the low flow systems Indian J Anaesth, 2013.PMID 24249885
- [3]Hartle A, Anderson E, Bythell V, et al. Checking anaesthetic equipment 2012. Anaesthesia, 2012.PMID 22563957
- [4]Kaul TK, Mittal G. Mapleson's Breathing Systems. Indian Journal of Anaesthesia, 2013.PMID 24249884
- [5]Goneppanavar U, Prabhu M. Anaesthesia machine: checklist, hazards, scavenging. Indian Journal of Anaesthesia, 2013.PMID 24249887