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This policy applies to all staff collecting specimens for coagulation testing.
Specimens for coagulation testing should be collected by venipuncture or via peripheral IV.
Heparin is not used in peripheral IVs, but a 3 mL discard is required to clear the line of any residual saline from flushing the line.
Coagulation specimens should not be drawn from venous access devices through which heparin has been instilled, i.e. ports, hickman lines, PICC lines.
If the blood must be drawn through an indwelling catheter, possible heparin contamination and specimen dilution should be considered. This process should only be used as a last resort. If a venous access device through which heparin has been instilled is the only access, the line should be flushed with 5 mL of saline and the first 5 mL of blood or 6-times the line volume (dead space volume of the catheter) be drawn off and discarded before the coagulation tube is filled. For those samples collected from a normal saline lock (capped off venous port) twice the dead space volume of the catheter and extension set should be discarded.
—————————— Sherry Johnson, CPON,MSN West Memphis, AR United States —————————— ——————————————- Original Message: Sent: 03-05-2020 12:24 PM From: Albert Tapia Subject: Coagulation tests
We draw them from out CVC’s. (Brovuac,Mediport, PICC’s) or if they don’t have access they are drawn peripherally.
Valley Children’s Hospital Madera,CA
—————————— Albert Tapia, RN Madera, CA United States ——————————
Original Message: Sent: 03-05-2020 05:56 AM From: Loucine Kaplanian Subject: Coagulation tests
Dear members, Please, it is highly appreciated if you can share with me some information about the following practice: Do you aspirate PT/PTT/INR levels from polysite or PICC line or central line or you only aspirate them from peripheral sites? Thank you!