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Lab draws from PICC infusing Heparin

When you have a PICC or chest placed CVC that is infusing a heparin drip, is it acceptable to draw PTT from that line? (if single lumen or even from a double or triple lumen)  If so, do you flush with at least 20mls NS? If not, please state why and either way, please state references....Thanks much! Cindy Hunchusky, RN-Harris Methodist Hospital, Fort Worth, TX

You should not draw coag
You should not draw coag studies from a lumen infusing heparin or flushed with a heparin lock solution. If a multiple lumen catheter, stop all infusion through all lumens for at least one full minute before drawing from another lumen. I can not copy and paste references from my databases into the forum, sorry. Lynn

Lynn Hadaway, M.Ed., RN, BC, CRNI

Lynn Hadaway Associates, Inc.

126 Main Street, PO Box 10

Milner, GA 30257


Office Phone 770-358-7861

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