D-Dimer Test

[steppingcarefully]

Does anyone know why the range for a D-Dimer test when searching online says up to 500ng/ml but on the test result I have received the range is up to 226ng/ml so anything above that is considered high?

Every Trust is different you'll have to ask the hosp that ran the test (baring in mind it's a pretty useless test, if its neg that's great no clot, but there's a trillion things that aren't clots that also elevate it

Thank you. I have seen that other things can raise it. I don't understand how the range can be so different though. Does that mean one hospital would investigate a reading of say 250 further but another hospital wouldn't?

Depends on lab assays (sorry not a lab tech so no clue on the specifics), if it's significantly high by the range the lab uses, then it needs investigating