Clinical pathology: Difference between revisions
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*[[Cytology]] | *[[Cytology]] | ||
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==Sample tube types== | |||
The following is an overview of the main types of sample tube types, organized by order of draw (the recommended sequence by which blood is drawn): | |||
{|class="wikitable" | |||
|+ Sample tube types for phlebotomy | |||
! Tube cap color or type in order of draw !! Additive !! Usage and comments | |||
|- | |||
| '''Blood culture''' bottle || '''Sodium polyanethol sulfonate''' (anticoagulant) and '''growth media''' for microorganisms|| Usually drawn first for minimal risk of contamination.<ref>{{cite book|first1=KD |last1=Pagana|first2=TJ |last2=Pagana|first3=TN |last3=Pagana|title=Mosby's Diagnostic and Laboratory Test Reference - E-Book|url=https://books.google.com/books?id=J7eXBAAAQBAJ&pg=PR13|date=19 September 2014|publisher=Elsevier Health Sciences|isbn=978-0-323-22592-2|p=xiii}}</ref> Two bottles are typically collected in one blood draw; one for aerobic organisms and one for anaerobic organisms.<ref>{{cite book|title=Clinical Microbiology Procedures Handbook|url=https://books.google.ca/books?id=pEL2DwAAQBAJ&pg=PT140|date=6 August 2020|publisher=Wiley|isbn=978-1-55581-881-4|chapter=Chapter 3.4.1: Blood cultures; general detection and interpretation}}</ref> | |||
|- | |||
!style="background: skyblue"| Light blue | |||
| Sodium '''citrate''' (anticoagulant) || '''Coagulation tests''' such as prothrombin time (PT) and partial thromboplastin time (PTT) and thrombin time (TT). Tube must be filled 100%. | |||
|- | |||
!style="background: red; color: white"| Plain red | |||
| '''No additive''' || '''Serum''': Total complement activity, cryoglobulins | |||
|- | |||
!style="background: goldenrod"| Gold (sometimes red and grey "tiger top"<ref>{{Cite web|date=June 2019|title=Test Tube Guide and Order of Draw|url=https://www.guthrie.org/sites/default/files/GMG_708_0002%20Test%20Tube%20Chart%20and%20Order%20of%20Draw%20Guide%20Attachment%20A%20%20%206-25-19.pdf|url-status=live|website=Guthrie Laboratory Services}}</ref>) | |||
| '''Clot activator''' and '''serum separating''' gel<ref>{{cite web|url=http://www.pathology.uci.edu/services/specimen-containers.asp|title=Specimen requirements/containers|website=Pathology & Laboratory Medicine, UCI School of Medicine|access-date=2020-09-10}}</ref> || '''Serum-separating tube''': Tube inversions promote clotting. Most chemistry, endocrine and serology tests, including hepatitis and HIV. | |||
|- | |||
!style="background: mediumseagreen; color: white"| Dark green | |||
| Sodium '''heparin''' (anticoagulant) || Chromosome testing, HLA typing, ammonia, Lactic acid|lactate | |||
|- | |||
!style="background: lightgreen"| Light green | |||
| Lithium '''heparin''' (anticoagulant) || '''Plasma'''. Tube inversions prevent clotting | |||
|- | |||
!style="background: MediumOrchid"| Lavender ("purple") | |||
| '''EDTA''' (chelator / anticoagulant) || '''Whole blood''': CBC, ESR, Coombs test, platelet antibodies, flow cytometry, blood levels of tacrolimus and cyclosporin | |||
|- | |||
!style="background: pink"| Pink | |||
| '''EDTA''' (chelator / anticoagulant) || '''Blood typing''' and cross-matching, direct Coombs test, HIV viral load | |||
|- | |||
!style="background: royalblue; color: white"| Royal blue | |||
| '''EDTA''' (chelator / anticoagulant) || Trace elements, heavy metals, most drug levels, toxicology | |||
|- | |||
!style="background: tan"| Tan | |||
| '''EDTA''' (chelator / anticoagulant) || '''Lead''' | |||
|- | |||
!style="background: gray; color: white"| Gray | |||
| | |||
*Sodium '''fluoride''' (glycolysis inhibitor) | |||
*Potassium '''oxalate''' (anticoagulant)<ref name="pmid1644639">{{cite journal| vauthors=Castellini MA, Castellini JM, Kirby VL| title=Effects of standard anticoagulants and storage procedures on plasma glucose values in seals. | journal=J Am Vet Med Assoc | year= 1992 | volume= 201 | issue= 1 | pages= 145–8 | pmid=1644639 | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=1644639 }} </ref> | |||
| '''Glucose test|Glucose''', lactate<ref name="DasguptaSepulveda2019">{{cite book|author1=Amitava Dasgupta|author2=Jorge L. Sepulveda|title=Accurate Results in the Clinical Laboratory: A Guide to Error Detection and Correction|url=https://books.google.com/books?id=HB2kDwAAQBAJ&pg=PA131|date=20 July 2019|publisher=Elsevier Science|isbn=978-0-12-813777-2|page=131}}</ref> | |||
|- | |||
!style="background: yellow"| Yellow | |||
| '''Acid-citrate-dextrose A''' (anticoagulant) || Tissue typing, DNA studies, HIV cultures | |||
|- | |||
!style="background: pearl"| Pearl ("white") | |||
| '''Separating gel''' and (K<sub>2</sub>)'''EDTA''' || '''PCR''' for adenovirus, toxoplasma and HHV-6 | |||
|} | |||
==Lab management== | ==Lab management== | ||