Avoidance to wipe alcohol before venipuncture is not a source of spurious hemolysis

Avoidance to wipe alcohol before venipuncture is not a source of spurious hemolysis

BACKGROUND It is still uncertain whether or not avoidance to let disinfectant alcohol dry at the site of venipuncture is a source of spurious hemolysis when drawing venous blood. METHODS In a consecutive series of 52 outpatients referred for routine laboratory testing, venous blood was drawn by direct venipuncture with (odd group) or without (pair group) wiping 70% isopropyl alcohol at the si...

Scoring System for Detecting Spurious Hemolysis in Anticoagulated Blood Specimens

BACKGROUND The identification of in vitro hemolysis (IVH) using a hematology analyzer is challenging because centrifugation of the specimens cannot be performed for cell counts. In the present study, we aimed to develop a scoring system to help identify the presence of hemolysis in anticoagulated blood specimens. METHODS Thirty-seven potassium EDTA anticoagulated blood specimens were obtained...

Confidence level in venipuncture and knowledge on causes of in vitro hemolysis among healthcare professionals

INTRODUCTION This study aimed to assess confidence level of healthcare professionals in venipuncture and their knowledge on the possible causes of in vitro hemolysis. MATERIALS AND METHODS A sample of 94 healthcare professionals (nurses and laboratory technicians) participated in this survey study. A four-section questionnaire was used as a research instrument comprising general information f...

Pattern avoidance is not P-recursive

Let F ⊂ Sk be a nite set of permutations and let Cn(F) denote the number of permutations σ ∈ Sn avoiding the set of patterns F . The Noonan Zeilberger conjecture states that the sequence {Cn(F)} is P-recursive. We disprove this conjecture. The proof uses Computability Theory and builds on our earlier work [GP1]. We also give two applications of our approach to complexity of computing {Cn(F)}.

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