RT Journal Article T1 Preanalytical mistakes in samples from primary care patients. A1 Romero Ruiz, Adolfo A1 Cobos Díaz, Andrés A1 López-León, Ana A1 Ortega, Germán A1 Muñoz, Manuel K1 Blood sampling K1 Mistake detection K1 Preanalytical mistakes K1 Primary health care K1 Errores Diagnósticos K1 Pruebas de Química Clínica K1 Atención Primaria de Salud K1 Humanos AB BACKGROUNDPreanalytical mistakes (PAMs) in samples usually led to rejection upon arrival to the clinical laboratory. However, PAMs might not always be detected and result in clinical problems. Thus, PAMs should be minimized. We detected PAMs in samples from Primary Health Care Centres (PHCC) served by our central laboratory. Thus, the goal of this study was to describe the number and types of PAMs, and to suggest some strategies for improvement.METHODSThe presence of PAMs, as sample rejection criteria, in samples submitted from PHCC to our laboratory during October and November 2007 was retrospectively analysed.RESULTSOverall, 3885 PAMs (7.4%) were detected from 52,669 samples for blood analyses. This included missed samples (n=1763; 45.4% of all PAMs, 3.3% of all samples), haemolysed samples (n=1408; 36.2% and 2.7%, respectively), coagulated samples (n=391; 10% and 0.7%, respectively), incorrect sample volume (n=110; 2.8% and 0.2%, respectively), and others (n=213; 5.5% and 0.4%, respectively). For urine samples (n=18,852), 1567 of the samples were missing (8.3%).CONCLUSIONSWe found the proportion of PAMs in blood and urine samples to be 3-fold higher than that reported in the literature. Therefore, strategies for improvement directed towards the staff involved, as well as an exhaustive audit of preanalytical process are needed. To attain this goal, we first implemented a continued education programme, financed by our Regional Health Service and focused in Primary Care Nurses. PB Walter de Gruyter SN 1434-6621 YR 2009 FD 2009-11-24 LK http://hdl.handle.net/10668/751 UL http://hdl.handle.net/10668/751 LA en NO Romero Ruiz A, Cobos Díaz A, López-León A, Ortega G, Muñoz M. Preanalytical mistakes in samples from primary care patients. Clin. Chem. Lab. Med. 2009; 47(12):1549-1552 NO Journal Article; Research Support, Non-U.S. Gov't; DS RISalud RD Apr 7, 2025