Petechiae

Definition

Petechiae are small, red or purple spots caused by minor bleeding from broken capillary blood vessels. They can be an important clinical sign of underlying health issues, including nutritional deficiencies and hematologic conditions.

5 Must Know Facts For Your Next Test

1. Petechiae can be caused by deficiencies in essential nutrients like vitamin C and vitamin K.
2. They often appear in clusters and do not blanch when pressed.
3. The presence of petechiae can indicate thrombocytopenia, a condition characterized by low platelet counts.
4. Petechiae are commonly seen in conditions affecting coagulation and may require immediate medical attention.
5. Nutritional assessment is vital to rule out deficiencies that could contribute to the appearance of petechiae.

Review Questions

• What nutritional deficiencies are commonly associated with petechiae?
• How does the appearance of petechiae differ from other types of skin rashes?
• Why is it important to assess for petechiae in patients with suspected hematologic disorders?

Related terms

Thrombocytopenia: A condition characterized by abnormally low levels of platelets in the blood.

Scurvy: A disease resulting from a deficiency of vitamin C, leading to symptoms like bleeding gums and petechiae.

Coagulation: The process by which blood forms clots to prevent excessive bleeding.