How long can blood stored with CPDA?
**Core Concept**
Blood storage with CPDA (Citrate-Phosphate-Dextrose-Adenine) is a method used to extend the shelf life of red blood cells. This technique involves the use of adenine, which helps to maintain the integrity of the red blood cell membrane and prevent hemolysis.
**Why the Correct Answer is Right**
The addition of adenine in CPDA solution allows for the regeneration of ATP (adenosine triphosphate) in red blood cells, thereby maintaining their viability and function. This is particularly important in the storage of blood, as ATP is essential for maintaining the integrity of the red blood cell membrane. As a result, blood stored with CPDA can be kept for up to 35 days.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because CPDA is not used for whole blood storage, but rather for the storage of red blood cells.
**Option B:** This option is incorrect because CPDA is used for longer storage periods, not shorter ones.
**Option C:** This option is incorrect because CPDA is not used for platelet storage, but rather for red blood cell storage.
**Clinical Pearl / High-Yield Fact**
It's essential to note that blood stored with CPDA should be kept at a temperature between 2-6°C to maintain the viability of the red blood cells.
**Correct Answer: B. 35 days.**