LOINC
Version 2.71

49497-1Platelets [#/volume] in Blood by EstimateActive

Term Description

In the Hematology world estimated cell counts have existed for many moons and they are reported either qualitatively or quantitatively and done strictly by blood smear review.

Smear Estimated WBC and Platelet counts that aren't just reported as reduced/adequate/many that are actually estimated as a numeric result like an estimate of 4 K/cumm for WBC or 400 K/cumm for platelets. Like doing a retic count by counting so many fields on the smear type of estimate.

This Platelet estimate count is a manual quantitative count. We report a number.
See laboratory procedure:

B. Platelet Count Smear Estimate:

1, Use the 100X oil immersion objective.
2. Estimate the average number of platelets per field using 10 different fields, where the RBCs are evenly dispersed. Avoid field in which RBCs strongly overlap as this will falsely increase the platelet estimate. Multiply this result by 20,000 to obtain an approximation of the platelet count.
3. A normal platelet count would show 8-20 plt/field; or one platelet per 10-30 RBCs.
4. NOTE: If platelet clumps or satellitism are seen, an estimate cannot be performed. Notify physician of problem. If indicated advise redraw in the appropriate anticoagulant, sodium citrate (blue-top). Order will need to be placed for a CBC SODIUM CITRATE test. This will automatically order both lav & blue tubes.

III. REFERENCES:

A. A Color Atlas and Instruction Manual of Peripheral Blood Cells Morphology, by Barbara H. O'Connor, 1984, p. 20.
B. Principles and Procedures, Barbara A. Brown, 6th Edition, 1993, p. 104.
Source: Regenstrief LOINC

Part Description

LP14597-6   Platelets
Platelets are miniature fragments of cytoplasm that break off of megakaryocytes. Their primary function is to inhibit excessive hemorrhage after blood vessel injury. Platelets cling to the damaged part of the blood vessel where they become activated, recruit other platelets to the site, and begin the cascade of physical and chemical events that lead to clot formation. Activated platelets secrete cytokines, chemokines, and growth factors, all which play a role in thrombus development.When activated, platelets stimulate monocytes and neutrophils to leave the blood vessel and enter the tissue.[PMID:27226790] The normal range of platelets is 150,000 to 450,000 platelets/uL. Lower than normal platelet counts can lead to increased bleeding and is caused by a number of factors including: chemotherapy, autoimmune disorders and some medications. Increased platelets can cause hypercoagulation due to cancer, anemia, spleen removal and some medications.[MedlinePlus Encyclopedia:003647] Source: Regenstrief LOINC

Fully-Specified Name

Component
Platelets
Property
NCnc
Time
Pt
System
Bld
Scale
Qn
Method
Estimate

Additional Names

Short Name
Platelet # Bld Est
Display Name
Platelets Estimate (Bld) [#/Vol]
Consumer Name Alpha
Platelet count, Blood

Basic Attributes

Class
HEM/BC
Type
Laboratory
First Released
Version 2.22
Last Updated
Version 2.70
Order vs. Observation
Both

Reference Information

Type Source Reference
Webcontent Lab Tests Online®Copyright Copyright © 2021 Lab Tests Online. All rights reserved. Platelet Count

Member of these Groups

LG32892-8 Platelets|NCnc|Pt|Bld

Language Variants Get Info

zh-CNChinese (China)
血小板:计数型浓度:时间点:全血:定量型:估计法
nl-NLDutch (Netherlands)
trombocyten:aantal/volume:moment:bloed:kwantitatief:schatting
fr-BEFrench (Belgium)
Plaquettes:Concentration numérique:Temps ponctuel:Sang:Quantitatif:Estimation
fr-CAFrench (Canada)
Plaquettes:Concentration numérique:Temps ponctuel:Sang:Quantitatif:Estimé
fr-FRFrench (France)
Plaquettes:Nombre/Volume:Ponctuel:Sang:Numérique:Estimation
it-ITItalian (Italy)
Piastrine:NCnc:Pt:Sangue:Qn:Stima
pt-BRPortuguese (Brazil)
Plaquetas:NCnc:Pt:SgTotal:Qn:Estimado
es-ESSpanish (Spain)
Plaquetas:Concentración de número:Punto temporal:Sangre:Qn:Estimación
tr-TRTurkish (Turkey)
Trombositler:SayKons:Zmlı:Kan:Kant:Hesap

Example Units

Unit Source
10*3/uL Example UCUM Units

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