need help w/ distinction .... RNY

Could anyone give me an explination of the RNY Proximal vs. the RNY Distal i know it has to do with how close or far away from the stomach... what i need to know is long term healthwise .... and what weightloss differences, nutrition differences, and supliments differences are there? thank you in advance...

My surgeon said it related to how much was removed. More is distal and less is proximal. Both use malasorption, however it is more significant with distal. Thus, even more attention needs to be paid to avoid malnutrition.