Tpn and lab draws

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What's your facilities policy on drawing labs with patients on tpn? 
started at a community hospital and they had us hold it for 30 min then draw 

hospital after had us 1/2 it for 30 min then draw

whats the most evidence based way to go about it to get an accurate draw and prevent hypoglycemia?

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Specializes in Critical Care, Capacity/Bed Management.

It is advised to not draw labs from the dedicated TPN lumen. If the patient were to have a TL CVC or DL/TL PICC then we typically stop the TPN 2-3 minutes before drawing labs. 

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