Pathophysiology
This is the standard numerical threshold (cells/mcL) below which a patient is diagnosed with thrombocytopenia.
What is 150,000?
To prevent skin trauma while shaving, nurses must ensure the patient only uses this type of razor.
What is an electric razor?
These pinpoint, circular, red/purple spots appear on the skin due to bleeding from capillaries.
What are petechiae?
This is the primary cell type responsible for forming the initial "plug" during the clotting process.
What are platelets (thrombocytes)?
In Heparin-Induced Thrombocytopenia (HIT), the nurse should expect the platelet count to drop by this percentage within 5 to 10 days of starting Heparin therapy.
What is 50% or more? > NCLEX Tip: Even if the count is still "normal" (e.g., it drops from 400k to 190k), a 50% drop is a diagnostic hallmark for HIT and requires immediate cessation of Heparin.
This organ can cause a drop in circulating platelets by "sequestering" or trapping them.
What is the Spleen?
This route of medication administration should be avoided to prevent deep tissue hematomas.
What is Intramuscular (IM)?
This is the medical term for larger purple or brownish-red spots caused by bleeding under the skin.
What is purpura?
Patients are strictly told to avoid this class of over-the-counter pain relievers, including Aspirin and Ibuprofen.
What are NSAIDs?
A patient with a platelet count of 30,000 develops a distended, board-like abdomen and referred shoulder pain. These are classic signs of this internal emergency.
What is a Splenic Rupture or Internal Abdominal Hemorrhage? > NCLEX Tip: "Board-like" abdomen always equals an emergency (bleeding or perforation).
Cancer or chemotherapy can cause low platelets by damaging this "factory" where platelets are produced.
What is the Bone Marrow?
After a necessary venipuncture, a nurse should apply firm pressure for at least this many minutes.
What is 10 minutes?
A sudden change in this (LOC) is the most critical "red flag" for a patient with a low platelet count.
What is Level of Consciousness? (Indicates intracranial bleed)
Spontaneous, life-threatening hemorrhages are most likely to occur when the platelet count drops below this specific number?
What is 20,000?
Before administering a Platelet Transfusion, the nurse must ensure the platelets are at this temperature and administered over this specific timeframe.
What is Room Temperature and 15–30 minutes? > NCLEX Tip: Unlike Packed Red Blood Cells (which are cold and slow), platelets are fragile. They are kept at room temperature to maintain function and "bolused" quickly to prevent clumping.
This paradoxically causes thrombosis (clotting) despite a dropping platelet count and is triggered by an immune response to a common anticoagulant medication.
What is Heparin-Induced Thrombocytopenia (HIT)?
A patient with thrombocytopenia has a sudden drop in systolic blood pressure and an increase in heart rate. This is the priority nursing assessment to perform immediately before calling the provider.
What is checking for occult (hidden) bleeding?
**Check for a distended/rigid abdomen (internal bleed) or perform a fecal occult blood test (guaiac).
These three specific findings—Petechiae, Purpura, and Mucosal Bleeding—appearing simultaneously in a patient with a recent viral infection often point to this autoimmune destruction of platelets.
What is Immune Thrombocytopenic Purpura (ITP)?
Unlike simple thrombocytopenia, this life-threatening condition shows low platelets PLUS an elevated D-dimer and prolonged PT/PTT times.
What is Disseminated Intravascular Coagulation (DIC)?
**DIC is a "consumption" disorder—the body uses up all clotting factors and platelets at once, leading to bleeding from everywhere (IV sites, gums, etc.).
This is the first action a nurse takes when a patient on a Heparin drip shows a sudden drop in platelets, even before notifying the Healthcare Provider.
What is stopping the Heparin infusion? > NCLEX Tip: On the NCLEX, if a medication is causing a life-threatening reaction (like HIT), the priority "Assessment" or "Action" is almost always to stop the trigger.