Abid Ur Rahman: Platelet Disorders and Laboratory Findings
Abid Ur Rahman, Laboratory Intern at Islamabad Diagnostic Centre, shared a post on LinkedIn:
“Platelet Disorders and Laboratory Findings
Platelets (thrombocytes) are critical for primary hemostasis, forming the initial platelet plug at sites of vascular injury.
Disorders of platelets can involve quantitative abnormalities (number) or qualitative defects (function), leading to bleeding or, less commonly, thrombotic complications.
Classification of Platelet Disorders
Quantitative Disorders (Platelet Count Abnormalities)
Thrombocytopenia (Decreased Platelet Count <150,000/µL)
Causes:
- Bone marrow failure (aplastic anemia, leukemia)
- Increased destruction (immune thrombocytopenic purpura – ITP)
- Infections (viral, sepsis)
- Drug-induced (heparin, chemotherapy)
Thrombocytosis (Increased Platelet Count >450,000/µL)
Causes:
- Reactive (inflammation, infection, iron deficiency)
- Myeloproliferative disorders (e.g., essential thrombocythemia)
Qualitative Disorders (Platelet Function Defects)
Inherited Disorders
- von Willebrand disease (defective platelet adhesion)
- Glanzmann thrombasthenia (defective aggregation)
Acquired Disorders
- Uremia (renal failure)
- Liver disease
- Drug effects (aspirin, NSAIDs)
Key Laboratory Findings
Platelet Count (CBC)
- in thrombocytopenia
- in thrombocytosis
Bleeding Time (BT) / Platelet Function Tests
- Prolonged in platelet dysfunction
Peripheral Blood Smear
- Assess platelet number and morphology
- Giant platelets: Bernard-Soulier syndrome
- Platelet clumping: pseudo-thrombocytopenia
Prothrombin Time (PT)
- Usually normal in platelet disorders
Activated Partial Thromboplastin Time (APTT)
- Normal in isolated platelet disorders
- Prolonged in von Willebrand disease (due to factor VIII involvement)
Platelet Aggregation Studies
- Evaluate response to agonists (ADP, collagen)
- Abnormal in functional platelet disorders
Clinical Features
- Easy bruising
- Petechiae and purpura
- Mucosal bleeding (gums, nose)
- Prolonged bleeding after injury
Interpretation Patterns
- Low Platelets and Normal PT/APTT: Thrombocytopenia (e.g., ITP, marrow suppression)
- Normal Platelets and Prolonged Bleeding Time: Platelet function disorder
- Normal Platelets and Prolonged APTT: Consider von Willebrand disease
Clinical Importance
Platelet disorder evaluation helps:
- Diagnose bleeding disorders
- Differentiate quantitative vs qualitative defects
- Monitor drug effects (antiplatelet therapy)
- Guide treatment decisions and transfusion needs
Platelet testing bridges primary hemostasis and clinical bleeding assessment, making it essential for accurate diagnosis and patient care.”
Stay updated on all scientific advances with Hemostasis Today.
-
Aug 11, 2026, 06:48Rishdha Roshad: What Happens to the Brain During Cardiopulmonary Bypass?
-
Aug 11, 2026, 05:53Isaac Okello: Strengthening Sickle Cell Advocacy in Uganda
-
Aug 11, 2026, 05:38Rami Unterman: A Simple New Biomarker for Fibrotic ILDs
-
Aug 11, 2026, 04:10Haroun Gajraj: CLaCS vs Sclerotherapy – What Does the Evidence Show
-
Aug 11, 2026, 02:54Tareq Abadl: The Ultimate Guide to Clinically Significant Antibodies
-
Aug 10, 2026, 17:35Chokri Ben Lamine: Balancing Holistic Care and Precision in Hematology
-
Aug 10, 2026, 17:14Anna Stanizzi: Patient Blood Management as a New Model of Personalized Care
-
Aug 10, 2026, 17:12Odong Christopher: New Research on Ischemic Stroke Prediction in Uganda
-
Aug 10, 2026, 16:58Jeff Szer AM: Advancing the Management of Paroxysmal Nocturnal Hemoglobinuria