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To mix or not to mix venous blood samples collected in vacuum tubes?
Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk kemi. Linköpings universitet, Hälsouniversitetet.
Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk kemi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Diagnostikcentrum, Klinisk kemi.
2011 (engelsk)Inngår i: Clinical Chemistry and Laboratory Medicine, ISSN 1434-6621, E-ISSN 1437-4331, Vol. 49, nr 12, s. 2061-2063Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Background: There are recommendations to mix venous blood samples by inverting the tubes immediately after venipuncture. Though mixing allows efficient anticoagulation in plasma tubes and fast initiation of coagulation in serum tubes, the effect on laboratory analyses and risk of haemolysis has not been thoroughly evaluated. less thanbrgreater than less thanbrgreater thanMethods: Venous blood samples were collected by venipuncture in vacuum tubes from 50 patients (10 or 20 patients in each group). Four types of tubes and 18 parameters used in routine clinical chemistry were evaluated. For each patient and tube, three types of mixing strategies were used: instant mixing, no mixing and 5 min of rest followed by mixing. less thanbrgreater than less thanbrgreater thanResults: Most analyses did not differ significantly in samples admitted to different mixing strategies. Plasma lactate dehydrogenase and haemolysis index showed a small but significant increase in samples omitted to instant mixing compared to samples without mixing. However, in one out of twenty non-mixed samples, activated partial thromboplastin time was seriously affected. less thanbrgreater than less thanbrgreater thanConclusions: These results indicate that mixing blood samples after venipuncture is not mandatory for all types of tubes. Instant mixing may introduce interference for those analyses susceptible to haemolysis. However, tubes with liquid-based citrate buffer for coagulation testing should be mixed to avoid clotting.

sted, utgiver, år, opplag, sider
Walter de Gruyter , 2011. Vol. 49, nr 12, s. 2061-2063
Emneord [en]
haemolysis, mixing, pre-analytical, venipuncture
HSV kategori
Identifikatorer
URN: urn:nbn:se:liu:diva-75288DOI: 10.1515/CCLM.2011.705ISI: 000299856700019OAI: oai:DiVA.org:liu-75288DiVA, id: diva2:505904
Merknad

Funding Agencies|Faculty of Health and Sciences, Linkoping University, Sweden|LIO-19451|

Tilgjengelig fra: 2012-02-27 Laget: 2012-02-24 Sist oppdatert: 2017-06-28

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