Standard Gauge Needle for Administering Blood Products

In the medical field, the standard gauge needle for administering blood products is typically an 18 gauge needle. This size is often used because it allows for a quicker transfusion due to its large diameter.

However, in the case of older adults, the 18 gauge needle should not be used. As the skin and blood vessels of older adults can be thinner and more fragile, using a smaller gauge needle is safer and more comfortable. A 20 or 22 gauge needle is commonly used in these cases, so in the context of the options provided, the appropriate answer would be a) 18 gauge; 20 gauge.

So, remember to always consider the age and condition of the patient when choosing the right needle gauge for administering blood products!