I have had my medtronic strata valve readjust itself now 15 times in 3 years,local ns doesnt want to see me fobs me off with team members.My GP suggest 2nd opininion got to go out of local area which i did he is going to remove valve & fit an Integra OSV11self adjusting shunt fairly new on market,does anyone know about the Integra osv11.Would love to get feed back from anyone with similar problems.I feel i have to get this Strata valve out before it kills me.Good luck to all with Hydro it isnt easy.God bless