Last week after starting setup and after completing the system prime, I discovered the white clamp on the saline “T” missing. I didn’t want to throw away the cartridge and start the prime over, so I simply replaced the missing clamp with a hemostat. After I connected the saline line to the “T” I removed the hemostat because if a encountered low blood pressure while dialyzing, I would simply unclamp the remaining white clamp instead of the normal two white clamps. 

If the missing clamp had occurred almost anywhere else on the cartridge, I may have had to start over. Here’s one more simple step that must be checked before using any cartridge, ensure all the necessary clamps are in place BEFORE using the cartridge.