what does I.A.T. mean on a death certificate written as part of reason for death? Certificate dated 1920.?

it looks like it says 1. I.A.T. lip right (4 days)
2. Septacaemia (5days)
Answers:
The only thing I can think of is intra-arterial thrombosis which means a form a blood clot in an artery but I don't really know for sure.
The other option would be that it is shorthand for iatrogenic which means a condition created by the treatment started by the Doctors (a side-effect)
As intraoperative autologous transfusion was not widely used in 1920 I do not believe that this could be the cause of death
http://www.euspirit.org/en/upload/984528.

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1, some sort of fit/seizure resulting in vomiting/foaming at the mouth/Grimicing2, blood poisoningI think thats what they mean for IAT you could always ask your GP

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It stands for Interoperative Autotransfusion.Intraoperative autologous transfusion (IAT) is a method for blood conservation that has been shown to be effective in reducing the requirement for blood transfusion.

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