How long can blood be stored with CPD-A –
**Question:** How long can blood be stored with CPD-A?
**Core Concept:** CPD-A is a blood storage method involving Crystalloid Preservation, Dextran, and Adequate Oxygenation. It is one of the commonly used methods for storing blood.
**Why the Correct Answer is Right:** Blood can be stored for up to 42 days using CPD-A method. This method ensures that the blood stays viable for a longer duration due to better oxygenation, which is provided by the dextran component. Dextran helps in maintaining the red blood cells' deformability, preventing them from aggregating and clumping together.
**Why Each Wrong Option is Incorrect:**
A. 21 Days: This is the maximum storage duration for blood using citrate-phosphate-dextrose (CPD) method, which is a less efficient storage method compared to CPD-A.
B. 7 Days: While this is the maximum storage duration for blood using CPD method, it is not a suitable answer for CPD-A method.
C. 14 Days: This duration of storage is too short for optimal blood utilization and does not account for the benefits of dextran in CPD-A method.
D. 28 Days: This is too long, as it exceeds the recommended maximum storage duration for any blood storage method, including CPD-A.
**Clinical Pearl:**
The importance of storing blood efficiently lies in maintaining the blood's viability for transfusion purposes. Blood containing dextran can be stored for a longer duration without compromising the patient's health, making CPD-A a superior storage method compared to CPD.
**Correct Answer:**
D. 42 Days
Blood stored using CPD-A method can be stored for up to 42 days, ensuring adequate viability for transfusion while minimizing the risk of blood-borne infections and other complications. This longer storage duration is due to the added benefits of dextran in maintaining blood quality during storage.