Size of IV for blood transfusion

[Dr. Mian]

Many nurses seem to believe that a minimum PIV size of 20g is required for blood transfusion and in fact I was told this as well during training.

However, after a brief internet search I can not find any evidence to support this and further it does not appeal to common sense (a 7 micron RBC should fit through even the smallest PIV)

Comments?

[peeciss]

i've thought about that too. small diameter --> flow turbulence --> hypercoagulative state?

[Pingwin]

Hello, there are no recommendations. I asked about the iv-size during my training in the blood-donor centre. I was told that it didn't really matter. Of course, it is impossible to give blood quickly with the 20-22G, but it is possible and acceptable if no other access is available. In my opinion, 18-16G is the best.

[anaesami]

RBCs have no difficulty in going through the smallest venflon but the fluid is viscous and this generates a lot of resistance to flow occurs. the largest size possible in that patient is the ideal size for blood transfusion.