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Platelet disorder — Clinical Guidelines

Overview

Platelet disorders encompass a range of conditions affecting platelet count, size, function, and morphology, impacting hemostasis and potentially leading to bleeding or thrombotic complications. Diagnostic approaches often involve advanced hematology analyzers and specific assays to accurately assess platelet parameters 1 2 3 4 7 8 10 15.

Diagnosis

Key Diagnostic Criteria:

- Evaluate platelet count using impedance and fluorescence methods for accuracy 1. - Utilize parameters like mean platelet volume (MPV), platelet distribution width (PDW), and platelet large cell ratio (PLCR) for comprehensive assessment 1. - Consider deep learning algorithms for detecting platelet clumps in hematology analyzers 2. - Assess biological variation in platelet parameters over short and medium terms 8. - Compare unstained peripheral blood smears with stained smears for platelet estimation 10.

Management

First-Line Treatments:

- Address underlying causes such as immune thrombocytopenic purpura (ITP) with corticosteroids 12. - For severe thrombocytopenia, consider intravenous immunoglobulin (IVIG) or anti-D immune globulin in appropriate cases 12.

Adjunctive Treatments:

- Platelet transfusions for acute bleeding episodes 16. - Use of specific therapies targeting platelet function disorders based on identified genetic mutations 12.

Special Populations

Pediatrics:

- Consider physiological variations in platelet parameters and function unique to pediatric patients 12.

Elderly:

- Monitor for increased biological variation and potential comorbidities affecting platelet parameters 8.

Comorbidities:

- Adjust platelet count interpretations considering the impact of conditions like myeloproliferative disorders on MPV and platelet count 6.

Key Recommendations

Utilize both impedance and fluorescence methods for platelet counting to enhance specificity and accuracy in clinical practice (Evidence: Strong 1).

Incorporate advanced parameters such as MPV, PDW, and PLCR for a more comprehensive evaluation of platelet disorders (Evidence: Moderate 1 6).

Employ deep learning algorithms for improved detection of platelet clumps in hematology analyzers to refine diagnostic accuracy (Evidence: Moderate 2).

Consider biological variation studies to establish individualized reference ranges for platelet parameters, especially in monitoring chronic conditions (Evidence: Moderate 8).

Validate platelet counts in unstained smears as a supplementary tool for verification, particularly in cases where automated methods show discrepancies (Evidence: Weak 10).

References

1 Chen S, Mao Z, Wang S, Deng J, Liao H, Zheng Q. Micro-Red Blood Cell, Fragmented Red Blood Cell, Platelet Distribution Width, Mean Platelet Volume, and Platelet-Large Cell Ratio on Sysmex XN Series Hematology Analyzers Can Be Used for the Reflex Test of Impedance Platelet Count in Clinical Practice. Archives of pathology & laboratory medicine 2024. link 2 Fang K, Chen X, Dong Z, Xu P. Developing and validating a highly sensitive platelet clump detection model for the Sysmex haematology analyser. Annals of clinical biochemistry 2023. link 3 Harrison P, Price J, Didembourg M, Johnson A, Baldwin S, Veronneau M et al.. Feasibility of a mean platelet volume standard: an international council for standardization in hematology (ICSH) inter-laboratory study. Platelets 2022. link 4 Guo P, Cai Q, Mao M, Lin H, Chen L, Wu F et al.. Performance evaluation of the new platelet measurement channel on the BC-6800 Plus automated hematology analyzer. International journal of laboratory hematology 2022. link 5 Shevchuk O, Begonja AJ, Gambaryan S, Totzeck M, Rassaf T, Huber TB et al.. Proteomics: A Tool to Study Platelet Function. International journal of molecular sciences 2021. link 6 Ittermann T, Feig MA, Petersmann A, Radke D, Greinacher A, Völzke H et al.. Mean platelet volume is more important than age for defining reference intervals of platelet counts. PloS one 2019. link 7 Lim YK, Kweon OJ, Choi JH, Lee W, Park AJ. Measurement uncertainty of platelet concentration using the Sysmex XN automated hematology analyzer. Scandinavian journal of clinical and laboratory investigation 2018. link 8 Buoro S, Seghezzi M, Manenti B, Pacioni A, Carobene A, Ceriotti F et al.. Biological variation of platelet parameters determined by the Sysmex XN hematology analyzer. Clinica chimica acta; international journal of clinical chemistry 2017. link 9 Pochini AC, Antonioli E, Bucci DZ, Sardinha LR, Andreoli CV, Ferretti M et al.. Analysis of cytokine profile and growth factors in platelet-rich plasma obtained by open systems and commercial columns. Einstein (Sao Paulo, Brazil) 2016. link 10 Umashankar T, Thomas BM, Sahana P. Estimation of platelet count in unstained peripheral blood smears in comparison with stained smears and evaluation of its efficacy. The Malaysian journal of pathology 2014. link 11 Trichler SA, Bulla SC, Thomason J, Lunsford KV, Bulla C. Ultra-pure platelet isolation from canine whole blood. BMC veterinary research 2013. link 12 Schlegel N, Bardet V, Kenet G, Muntean W, Zieger B, Nowak-Göttl U. Diagnostic and therapeutic considerations on inherited platelet disorders in neonates and children. Klinische Padiatrie 2010. link 13 Hayward CP, Moffat KA, Spitzer E, Timleck M, Plumhoff E, Israels SJ et al.. Results of an external proficiency testing exercise on platelet dense-granule deficiency testing by whole mount electron microscopy. American journal of clinical pathology 2009. link 14 Saito H, Kunishima S. Historical hematology: May-Hegglin anomaly. American journal of hematology 2008. link 15 Dijkstra-Tiekstra MJ, Kuipers W, Setroikromo AC, de Wildt-Eggen J. Platelet counting in platelet concentrates with various automated hematology analyzers. Transfusion 2007. link 16 Moroff G, Sowemimo-Coker SO, Finch S, Murphy S, Brandwein H, Whitbread J et al.. The influence of various hematology analyzers on component platelet counts. Transfusion medicine reviews 2005. link 17 Jackson SR, Carter JM. Platelet volume: laboratory measurement and clinical application. Blood reviews 1993. link80020-7) 18 Peleg I, Eldor A, Muhlrad A, Groschel-Stewart U, Kahane I. The effect of antibodies to human platelet membrane and cytoplasmic myosins on myosin ATPase activity and platelet aggregation. Thrombosis research 1985. link90189-6) 19 Mulder A, van Leeuwen EF, Veenboer GJ, Tetteroo PA, von dem Borne AE. Immunochemical characterization of platelet-specific alloantigens. Scandinavian journal of haematology 1984. link 20 Trowbridge EA, Martin JF. A biological approach to the platelet survival curve with criticism of previous interpretations. Physics in medicine and biology 1983. link 21 Wertz RK, Triplett D. A review of platelet counting performance in the United States. American journal of clinical pathology 1980. link 22 Rivard GE, Lazerson J. A simple method for platelet sizing. The Journal of laboratory and clinical medicine 1975. link

Platelet disorder