Effects of needle size and storage temperature on measurements of serum potassium.

Author(s): Verresen L, Lins RL, Neels H, De Broe ME

Publication: Clin Chem, 1986, Vol. 32, Page 698-9

PubMed ID: 3955823 PubMed Review Paper? No

Purpose of Paper

Conclusion of Paper

Studies

1. Study Purpose

   The purpose of this study was to determine the effects of needle gauge and storage of blood specimens on serum potassium levels.

   Summary of Findings:

   The average potassium concentration was lower when blood was drawn through a 19 gauge needle than when drawn through a 23 gauge needle (p<0.001). Serum potassium concentrations increased when clotted blood was stored for 16 h at 4 degrees C (p<0.001), however no change in potassium levels occurred when clotted blood was stored for 16 h at 18 degrees C compared to that which was centrifuged and analyzed immediately.

   Biospecimens

   • Bodily Fluid - Blood
   • Bodily Fluid - Serum

   Preservative Types

   • None (Fresh)

   Diagnoses:

   • Not specified

   Platform:

   Analyte	Technology Platform
   Electrolyte/Metal	Clinical chemistry/auto analyzer

   Pre-analytical Factors:

   Classification	Pre-analytical Factor	Value(s)
   Biospecimen Acquisition	Needle gauge	19 23
   Storage	Storage temperature	4 degrees C 18 degrees C
   Storage	Storage duration	0 h 16 h
   Biospecimen Aliquots and Components	Centrifugation	Centrifugation delays investigated

   View more