▁sp ont ane ously ▁or ▁from ▁an ▁obsc ure ▁or ▁unknown ▁cause . ▁ ▁Qual ifications ▁ ▁Sp inal ▁fusion ▁is ▁usually ▁needed ▁when ▁a ▁curv ature ▁reaches ▁ 4 0 ▁degrees . ▁However , ▁there ▁is ▁a ▁window ▁of ▁opportunity ▁for ▁a ▁minim ally ▁invas ive ▁surg ery . ▁The ▁curv ature ▁needs ▁to ▁be ▁between ▁ 0 ▁and ▁ 7 0 ▁degrees . ▁Min imal ▁rib ▁rotation ▁and ▁only ▁one ▁curve ▁is ▁preferred . ▁Also , ▁minim ally ▁invas ive ▁sp inal ▁fus ions ▁are ▁almost ▁always ▁only ▁done ▁in ▁the ▁thor ac ic ▁region . ▁ ▁Before ▁operation ▁ ▁Diet ary ▁rules ▁for ▁surg ery ▁day ▁Inf ants ▁ 0 ▁to ▁ 6 ▁months : ▁ ▁No ▁sol ids ▁the ▁day ▁of ▁surg ery ▁ ▁Formula ▁or ▁breast ▁milk ▁until ▁four ▁hours ▁before ▁procedure ▁ ▁Clear ▁liqu ids ▁( water , ▁apple ▁ju ice , ▁flat ▁ 7 - up , ▁Ped ial y te ) ▁until ▁three ▁hours ▁before ▁procedure ▁ ▁Nothing ▁by ▁mouth ▁there after ▁ ▁Children ▁ 7 ▁months ▁and ▁older : ▁A . ▁No ▁sol ids ▁the ▁day ▁of ▁surg ery ; ▁B . ▁Formula ▁or ▁breast ▁milk ▁until ▁ 6 ▁hours ▁before ▁procedure ; ▁C . ▁Clear ▁liqu ids ▁( water , ▁apple ▁ju ice , ▁flat ▁ 7 - up , ▁Ped ial y te ) ▁until ▁three ▁hours ▁before ▁the ▁procedure ; ▁D . ▁Nothing ▁by ▁mouth ▁there after . ▁ ▁When ▁the ▁patient ▁arriv es ▁at ▁the ▁hospital ▁vital ▁signs ▁will ▁be