Overview
Mechanism-oriented platelet count disorder framing for laboratory pattern recognition.
Classification
| Pattern | Mechanism examples | Laboratory clues (not exclusive) |
|---|---|---|
| Thrombocytopenia, production | Marrow failure, TPO deficiency, chemotherapy | Low MPV/IPF; marrow hypocellular on biopsy when performed |
| Thrombocytopenia, destruction | ITP, DIC, TTP/HUS among others | High MPV; schistocytes if MAHA; directed reflex tests per protocol |
| Thrombocytopenia, sequestration | Hypersplenism | Other cytopenias possible; imaging clinical |
| Thrombocytopenia, dilution | Massive transfusion/fluid res | Contextual; other parameters affected |
| Thrombocytopenia, artifact | EDTA pseudothrombocytopenia | Clumps on smear; citrate repeat normal |
| Thrombocytosis, reactive | Inflammation, iron deficiency, post-splenectomy | Normal platelet morphology; inflammatory markers |
| Thrombocytosis, clonal | MPN among associations | Persistent isolated elevation; basophilia/giant platelets may prompt referral |
Morphologic Features
Smear comments describe, do not diagnose disease from morphology alone.
Laboratory Characteristics
- Use report intervals only for thrombocytopenia/thrombocytosis labels
Reference Intervals
Critical thresholds, institution-specific per GP47-aligned policy.
Clinical and Laboratory Significance
Patterns suggest mechanism branches, confirmatory testing clinician-directed.
Differential Considerations
Multiple etiologies per pattern, hedged language required.
Comparison Tables
Classification Frameworks
Laboratory Notes
- Screening NOT definitive diagnosis.
References
Authoritative textbooks, guidelines, and reviews supporting this reference entry. Verify reference intervals, critical limits, and reflex criteria against institutional protocols and current guideline editions.
Textbooks
- McPherson RA, Pincus MR. Henry's Clinical Diagnosis and Management by Laboratory Methods. 24th ed. Elsevier; 2021.
- Rodak BF, Carr JH. Rodak's Hematology: Clinical Principles and Applications. 6th ed. Elsevier; 2020.
- McKenzie SB, Williams JL. Clinical Laboratory Hematology. 4th ed. Pearson; 2022.
- Bain BJ. Blood Cells: A Practical Guide. 5th ed. Wiley-Blackwell; 2015.
CLSI and Professional Guidelines
- Clinical and Laboratory Standards Institute. Reference and Selected Performance Standards for the Automated Complete Blood Cell Count (CBC). CLSI document H26-A2. CLSI; 2010.
- Clinical and Laboratory Standards Institute. Defining, Establishing, and Verifying Reference Intervals in the Clinical Laboratory; Approved Standard. CLSI document EP28-A3c. CLSI; 2010.
- Clinical and Laboratory Standards Institute. Management of Critical- and Significant-Risk Results. CLSI guideline GP47-Ed1. CLSI; 2015.
- Clinical and Laboratory Standards Institute. Collection, Transport, and Processing of Blood Specimens for Testing Plasma-Based Coagulation Assays and Molecular Hemostasis Assays; Approved Guideline. CLSI document H21-A5. CLSI; 2017.
Frequently Asked Questions
Common questions about using this Platelet Disorders . Lookup foundational topics Medical Laboratory Library reference in Medical Laboratory Science education.
What is the Platelet Disorders . Lookup laboratory reference?
Platelet Disorders . Lookup is a Foundational Topics entry in the LabPedia Medical Laboratory Library, written for Medical Laboratory Science reference lookup.
How should students use this medical laboratory encyclopedia page?
Read the structured sections for quick orientation, then follow related links into Academy lessons or Challenge Center practice when you need teaching or assessment.
Does this page replace laboratory textbooks?
No. It is a concise educational laboratory reference. Use recognized laboratory medicine sources and your institutional procedures for definitive practice decisions.
Where can I find related laboratory tests?
Use related links on this page when present, or browse Laboratory Library discipline catalogues for laboratory tests and interpretation references.
Is this content part of Medical Laboratory Education on LabPedia?
Yes. Library references support Medical Laboratory Education alongside Academy courses, medical laboratory quizzes, and laboratory case studies.
Can reference details vary between laboratories?
Yes. Methods, intervals, and reporting conventions vary. Always confirm details against your laboratory’s current protocols.
How do I return to Library search or categories?
Use breadcrumbs to open the Library hub, discipline catalogues, or other reference collections for continued medical laboratory resource browsing.