Which of the following is absent in cryoprecipitate?
**Core Concept**
Cryoprecipitate is a concentrated solution of labile clotting factors, including fibrinogen, factor VIII, and von Willebrand factor, obtained from plasma after it has been frozen and then thawed. This process causes the precipitation of these clotting factors, which are then concentrated and used to treat bleeding disorders.
**Why the Correct Answer is Right**
Cryoprecipitate is specifically used to treat conditions related to deficiencies of these labile clotting factors. The absence of these factors in cryoprecipitate would render it ineffective for treating conditions such as hypofibrinogenemia or von Willebrand disease. **Factor V**, **fibrinogen**, and **factor VIII** are the key components of cryoprecipitate, which are essential for normal blood coagulation.
**Why Each Wrong Option is Incorrect**
* **Option A:** Factor VII is not a component of cryoprecipitate, as it is not a labile clotting factor that precipitates out during the freezing and thawing process.
* **Option B:** Factor X is present in cryoprecipitate, as it is a component of the prothrombin complex that is concentrated during the process. However, it is not the primary component of interest.
* **Option C:** Factor XIII is not typically included in cryoprecipitate, as it is a stable clotting factor that does not precipitate out during the freezing and thawing process.
**Clinical Pearl / High-Yield Fact**
Cryoprecipitate is often used to treat bleeding disorders in patients with conditions such as hemophilia A, von Willebrand disease, or fibrinogen deficiency. It is essential to remember that cryoprecipitate contains labile clotting factors, which must be handled and stored properly to maintain their potency.
**Correct Answer:** D. Factor VII