Formula for citrate volume adjustment In high hematocrit
When collecting blood into a citrate bulb (commonly used for coagulation tests like PT, APTT, etc.), the standard anticoagulant-to-blood ratio is 1 part citrate to 9 parts blood. However, if the patient has a significantly elevated hematocrit (usually above 55%), this ratio needs to be adjusted because the plasma volume (the actual liquid portion of … Read more