Friday, November 29, 2019

Axillary A line

Q: While inserting axillary arterial line, it should be ideally placed

A) as high as possible within the axilla
B) at low as possible within the axilla

Answer: A

The axillary arterial line should be inserted as high into the apex of the axilla as possible by palpation, or ideally as visualized by ultrasound. The axillary fossa can be exposed well by abduction and external rotation of the arm. This is due to the fact that as at a higher level the axillary artery receives good collateral flow through thyrocervical trunk and subscapular artery. This reduces risk of ischemia.



Htet N, Vaughn J, Adigopula S, Hennessey E, Mihm F. Needle-guided ultrasound technique for axillary artery catheter placement in critically ill patients: A case series and technique description. J Crit Care. 2017 Oct;41:194-197. doi: 10.1016/j.jcrc.2017.05.026. Epub 2017 May 25. 

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