Urine Collection for a Transfusion Reaction

[butlermom]

Recently we had a pediatric patient with an allergic reaction to platelets. In this case, the reaction workup was completed in a timely manner, but the patient could not provide a urine sample until about 14 hours post transfusion. The urine was sent to Blood Bank and the tech called me to see if it could still be resulted as part of the reaction. I told him it seemed like that was probably too long, but since it was sent, to go ahead and test it. We don't always get a urine with the post sample, and certainly have never received one this long after the reaction. The tech asked how long after a reaction could we use a urine sample. Any thoughts on this?  

[Yanxia]

It needs about 6 minutes to expel the substance in blood circulation through urine.

[John C. Staley]

Why are you even asking for a urine for an allergic rxn to platelets?

[Neil Blumberg]

Agree that a urine specimen isn't indicated for an allergic reaction, so no worries.

[mcgouc]

A urine specimen is not required for suspected allergic reactions. 

[JLH]

Aside from allergic reaction not requiring urine specimen, is there a specific timeframe that a urine sample have to be sent?