Higgins C. The use of heparin in preparing samples for blood-gas analysis. MLO Med Lab Obs 2007;39:16-8, 20;22.
Toffaletti J. Use of novel preparations of heparin to eliminate interference in ionized calcium measurements: Have all the problems been solved? Clin Chem 1994;40:508-9.
Küme T, Siþman AR, Solak A, Tuðlu B, Cinkooðlu B, Coker C. The effects of different syringe volume, needle size and sample volume on blood gas analysis in syringes washed with heparin. Biochem Med (Zagreb) 2012;22:189-201.
Ancy J. Preventing preanalytical error in blood gas analysis (The blood gas laboratory) J Respir Care Sleep Med Spring 2012;30:64.
Chhapola V, Kumar S, Goyal P. Is liquid heparin comparable to dry balanced heparin for blood gas sampling in intensive care unit? Indian J Crit Care Med 2014; 18:13-18.
Chhapola V, Kanwal SK, Sharma R, Kumar V. A comparative study on reliability of point of care sodium and potassium estimation in a pediatric intensive care unit. Indian J Pediatr 2013;80:731-5.
Kraut JA, Madias NE. Serum anion gap: Its uses and limitations in clinical medicine. Clin J Am Soc Nephrol 2007;2:162-74.