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**tr0llin, ridin dirty**
10+ Year Member
Apr 28, 2008
Where the grass is always greener
Resident [Any Field]
In reference to painful kidney stones......what is the cut off diameter where a stone might pass thru into the urine?? {I forgot} :oops:
<4-5mm are more likely to spontaneously pass through.
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Fading away
10+ Year Member
7+ Year Member
Dec 12, 2006
The rule of thumb I was taught, and continue to go by:

<5mm - likely will pass, pain control & encourage hydration (+/- Uroxatral)

5-10mm - dicey, do all of the above but give the Urologist a call to see if he's interested in going after it

>10mm - unlikely to pass, Urology will want to see them

Tori's dad

10+ Year Member
5+ Year Member
Jun 16, 2006
Resident [Any Field]
"Painful" stones implies obstruction at which point I believe it is recommended to remove if there is failure of the stone to progress even if the stone is 4mm. I got this info from here:
Reilly, Robert F. (2005). Nephrology in 30 Days. UNC Press. pp. 195. ISBN 1882886208
Let me know if you have any other guidlines you know of.
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