IV Push through cvc with triple lumen

[ksl777]

Help! I am stuck trying to figure out this situation. If a patient needs to be administered Labetolol IV push med through a triple lumen subclavian and all the ports are occupied (Cardizem-yes compatible, Heparin-not compatible, and 0.9 NaCl with 20 KCl-yes compatible) do I need to pinch off all three lines before administering the med, or just the tubing of the port that I am using? I am going to use the 0.9 NaCl with 20 KCl port and I know I need to pinch that line, but do I also need to pinch Cardizem and Heparin's tubing???

Thanks!

[Sugarcoma, RN]

Papaw!! Great response and soo helpful!