Proximal, Medial, Distal

I attendant a seminar recently with a friend, the surgeon explained how he did a side-to-side jejuna jejunostomy (spelling may not be correct)at a distance of 250 cm.. I have watched on this site how some members have talked what is proximal and distal means, but is there an approximate number that defines that.. I guess what I'm asking is the higher the number for distal or lower the number more distal... I among others on here may be confused by this..I'd like to see a surgeon or lay person answer this. I'm just confused as to what 250 cm is proximal, medial, or distal since that is the only reference number I have heard a surgeon talk about..

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