Preservation used for storing blood for transfusion is
**Core Concept**
The preservation of blood for transfusion involves maintaining the viability of red blood cells, platelets, and other blood components while minimizing hemolysis and microbial contamination. This is achieved through a combination of anticoagulants, preservatives, and storage conditions that mimic the physiological environment.
**Why the Correct Answer is Right**
The correct preservation method for storing blood for transfusion is the **Citrate-Phosphate-Dextrose (CPD) solution**. CPD solution contains citrate, phosphate, and dextrose, which help to:
* Inhibit coagulation by chelating calcium ions
* Maintain pH balance through phosphate buffering
* Provide energy for red blood cells through dextrose
The CPD solution is effective in preserving red blood cells for up to 35 days when stored at 2-6°C. This method is widely used for whole blood and red blood cell components.
**Why Each Wrong Option is Incorrect**
* **Option A:** (no option provided)
* **Option B:** Other preservation methods, such as the **Saline-Alanine (SAG) solution**, are used for specific blood components, like plasma and platelet concentrates. However, they are not the primary method for whole blood and red blood cell storage.
* **Option C:** (no option provided)
* **Option D:** (no option provided)
**Clinical Pearl / High-Yield Fact**
Remember that the CPD solution is a critical component of blood banking, and its proper use is essential for maintaining the viability of blood components.
**Correct Answer:** C. CPD solution.