Reverse Pseudohyperkalemia: An Important Clinical Entity in Chronic Lymphocytic Leukemia

Table 1

Reverse pseudohyperkalemia due to mechanical stress of specimen delivery. Potassium levels at different time points are shown, with respective LDH levels, which differ secondary to delivery mode of blood specimen for analysis.

Method of sample delivery	Day 1		Day 2		Day 3
	Potassium (mmol/L)	LDH (units/L)	Potassium (mmol/L)	LDH (units/L)	Potassium (mmol/L)	LDH (units/L)
Pneumatic transport-plasma	9.4	1214	8	1203	7.8	1208
Manually walked-plasma	4.2	718	5.1	814	5.2	819
Manually walked-serum/whole blood	3.7	—	4.8	—	4.4	—