Patient with bleeding due to platelet function defects has which of the following feautures?
**Core Concept**
Platelet function defects, also known as platelet disorders, are a group of conditions that affect the ability of platelets to form blood clots and stop bleeding. These disorders can lead to various bleeding manifestations, ranging from mild to severe.
**Why the Correct Answer is Right**
The correct answer is related to the characteristic feature of platelet function defects. Patients with platelet function defects often have a prolonged bleeding time, which is the time it takes for bleeding to stop after a small incision is made. This is because the platelets are unable to aggregate and form a stable clot, leading to prolonged bleeding. The bleeding time test is a useful diagnostic tool for identifying platelet function defects.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is not relevant to platelet function defects. While it's true that patients with platelet disorders may have thrombocytopenia (low platelet count), this is not a characteristic feature of platelet function defects.
* **Option B:** This option is incorrect because platelet function defects are not typically associated with anemia. Anemia is a condition characterized by low red blood cell count or hemoglobin levels, which is not directly related to platelet function.
* **Option C:** This option is not a characteristic feature of platelet function defects. While patients with platelet disorders may have a prolonged prothrombin time (PT) or activated partial thromboplastin time (aPTT), this is not a specific feature of platelet function defects.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that bleeding time is a specific test that evaluates platelet function, and it's often used in conjunction with other tests to diagnose platelet function defects. If a patient has a prolonged bleeding time, it may indicate a platelet function disorder.
**Correct Answer: C. Prolonged bleeding time.**