Definition

Noun: A medical condition characterized by an abnormally low level of prothrombin (also known as coagulation factor II) in the blood. This deficiency impairs the blood's ability to clot, leading to prolonged clotting times, ineffective clot formation, and a potential risk of excessive bleeding.

Usage

This term is used specifically in medical contexts to describe a hematological disorder. * The patient's persistent bleeding was attributed to hypothrombinemia. * A diagnosis of hypothrombinemia requires specific coagulation factor assays.

Advanced Usage

• Pathophysiology: Hypothrombinemia is a factor-specific coagulation disorder distinct from more general conditions like hemophilia (which involves factors VIII or IX).
• Etiology: It is often discussed as a potential consequence of vitamin K deficiency, as this vitamin is essential for the liver's synthesis of functional prothrombin.

Variants and Related Words

• Hypoprothrombinemia (n): A synonymous term used interchangeably with hypothrombinemia.
• Prothrombin (n): The plasma protein precursor to thrombin, which is deficient in this condition.
• Thrombin (n): The active enzyme formed from prothrombin that is central to clot formation.

Synonyms

• Prothrombin deficiency
• Factor II deficiency

Related Medical Terms

• Coagulopathy: A broader term for any disorder of blood coagulation.
• Hemorrhagic diathesis: A general predisposition to bleed abnormally.
• Prolonged Prothrombin Time (PT): A common laboratory finding associated with hypothrombinemia.

Noun

1. a low level of prothrombin (factor II) in the circulating blood; results in long clotting time and poor clot formation and sometimes excessive bleeding; can result from vitamin K deficiency