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Med-Surg · chapter 16 · Hematopoietic Disorders and Regulation

Thrombocytopenia

The 14 things this section of the textbook says that you are most likely to be asked about — quoted word for word, not retold. Then 3 practice questions with the reasoning.

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Key points

  1. Bleeding risk

    Individuals with thrombocytopenia may have increased risk for bleeding as their platelet count decreases, resulting in difficulty creating blood clots and controlling hemostasis.

  2. Platelet production trigger

    Platelet production is triggered in bone marrow by thrombopoietin, a protein released by the liver.

  3. Thrombocytopenia causes

    Thrombocytopenia can have many causes: from bone marrow disorders that impair production of platelets, such as leukemia and myelodysplastic syndromes, to diseases that disrupt platelet survival over time.

  4. Normal platelet range

    The normal range of platelets for males and females is 150,000–400,000/μL blood) (NORD, 2022).

  5. Bleeding manifestations

    Clinical manifestations can range from petechiae (pinpoint-sized spots on the skin) and bruising to more serious conditions like gastrointestinal or intracranial bleeding.

  6. HIT timing

    HIT is characterized by a drop in platelet count and an increase in blood coagulability, which can manifest anytime from 1 to 14 days after exposure to heparin (Nicolas et al., 2023).

  7. HIT thrombosis risk

    Although most individuals with HIT do not experience bleeding directly, its adverse effect is an increased risk of arterial and venous thrombosis and subsequent arterial and venous clot formation resulting from hypercoagulability.

  8. HIT risk scoring

    A “4-Ts” scoring system is commonly used to estimate risk potential of disease; 4-T scores less than 3 indicate a low probability for developing HIT (Lindholm Perrotta, 2023).

  9. ITP platelet destruction

    With ITP, the immune system erroneously recognizes platelets as foreign and produces antibodies to destroy them in the spleen and liver, which are key organs for filtering blood.

  10. Alcohol and platelets

    Chronic alcohol consumption can impair platelet production from bone marrow and has other consequences, direct and indirect, on platelet production and function.

  11. Nursing care priorities

    Nursing care for the patient with thrombocytopenia focuses on avoiding bleeding complications, creating a safe environment, and supporting overall patient well-being.

  12. Assessment cues

    These cues include bruising, purpura, petechiae, excessive bleeding from minor cuts or injuries, bleeding from gums, hematomas, hematuria, heavy menstrual bleeding, frequent or spontaneous nosebleeds, and blood blisters in the mouth or on the body.

  13. Bleeding prevention actions

    Actions to reduce further bleeding include avoiding sharp objects and using an electric razor or a soft toothbrush to avoid tissue integrity issues.

  14. Platelet transfusions

    Regardless of the cause, platelet transfusions can be used to directly increase the body’s platelets levels. This intervention is often used in cases such as severe bleeding or when platelet numbers have dropped dangerously low.

Terms to know

thrombocytopenia
Low platelet count syndrome, or thrombocytopenia, is an uncommon hematologic condition characterized by decreased numbers of platelets (thrombocytes) in the bloodstream, affecting three out of 100,000 people yearly in the United States (NORD, 2022).
hemostasis
Platelets play an essential role in hemostasis, which is the physiological process that prevents and controls bleeding.
heparin-induced thrombocytopenia (HIT)
An immune-mediated side effect caused by exposure to heparin products is known as heparin-induced thrombocytopenia (HIT).
idiopathic thrombocytopenic purpura (ITP)
More frequently referred to as immune thrombocytopenia, idiopathic thrombocytopenic purpura (ITP) is an autoimmune condition marked by an abrupt and significant drop in platelet count, leading to increased risks of bleeding and anemia.
alcoholic thrombocytopenia
A condition in which excessive alcohol consumption results in decreased platelet count in the blood is known as alcoholic thrombocytopenia, which leads to decreased clotting mechanisms and increases the risk for bleeding and bruising.
esophageal varices
With advanced liver disease, thrombocytopenia can be enhanced through the development of esophageal varices, which are dilated veins that generate under the mucosa of the lower esophagus and gastrointestinal tract, making the patient at risk for hemorrhage (Meseeha Attita, 2023).
plasmapheresis
The removal, treatment, and return or replacement of blood and blood products, known as plasmapheresis, may be performed help remove antibodies when treating HIT.

Practice questions

Stuck on select-all-that-apply? How to take them one option at a time.

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  1. At 1900, a nurse reviews the shift's findings for a patient with thrombocytopenia. Vital signs have normalized, platelet counts have continued to decline, and clotting times are unchanged. Which end-of-shift entry documents the trends in all three measures the section says must be documented?

    1. Vital signs normalized; overall response is improving, with platelet counts and clotting times to be reassessed.
    2. Platelet counts declined; overall response is worsening, with vital signs and clotting times to be reassessed.
    3. Vital signs normalized, but platelet counts continued to decline; clotting times remained unchanged.
    4. Clotting times remained unchanged; overall response is stable, with vital signs and platelet counts to be reassessed.

    Answer: Vital signs normalized, but platelet counts continued to decline; clotting times remained unchanged.

    The section states that documentation is essential to visualize trends in vital signs, blood components, and clotting times. Only the correct entry records the trend of each measure. The other entries record one measure and defer the two findings that are already available. A single normalized measure also does not show improvement: the section lists normalized vital signs together with stabilizing or improving platelet levels and decreasing clotting times as indications of improvement.

  2. At 1100, a nurse uses teach-back after discussing bleeding and injury prevention with a patient who has thrombocytopenia. Which patient statements support documenting an accurate understanding of the teaching? Select all that apply.

    1. I only need to avoid alcohol when I notice bleeding.
    2. I can participate in contact sports as long as I do not have visible bruises.
    3. I will switch to an electric razor to help avoid cuts.
    4. I can keep using a standard blade razor as long as I shave slowly.
    5. I will use a soft toothbrush to help avoid injuring my gums.

    Answer: I will switch to an electric razor to help avoid cuts., I will use a soft toothbrush to help avoid injuring my gums.

    A soft toothbrush and an electric razor match the section's recommendations for reducing tissue injury and bleeding. Shaving slowly with a standard blade does not match the recommendation to avoid sharp objects. The section also advises avoiding contact sports and alcohol, rather than limiting those precautions to times when bruising or bleeding is visible.

  3. At 1400, a nurse prepares a handoff note for a patient with confirmed heparin-induced thrombocytopenia (HIT). The platelet count has decreased, swelling is present, and no bleeding has been observed. Which entry best captures the condition-specific concern?

    1. No bleeding observed despite the decreased platelet count; findings support improvement in HIT.
    2. Platelet count decreased without observed bleeding; bleeding is the primary complication of concern from HIT.
    3. Platelet count decreased with swelling; the lower count indicates reduced blood coagulability.
    4. Platelet count decreased with swelling; thrombosis remains a concern despite no observed bleeding.

    Answer: Platelet count decreased with swelling; thrombosis remains a concern despite no observed bleeding.

    HIT combines a falling platelet count with increased blood coagulability, so the absence of bleeding does not remove the concern for thrombosis. The other entries misidentify the main HIT-related risk, infer reduced coagulability from the low count, or treat the absence of bleeding as evidence of improvement.

Where every quote comes from

Section 16.4 Thrombocytopenia of Medical-Surgical Nursing by Christy Bowen, Bridget Carey, Jessica Palozie, Maren Reinholdt, OpenStax, 2024. Read the whole section free at openstax.org.

The textbook is licensed under CC BY-NC-SA 4.0. This page quotes it word for word and adds the headings, the order and the practice questions; references to the book's figures and stray spaces left by its formatting are removed. The page is shared under the same licence. Nothing here is sold.