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•Idiopathic

•Genetic & Environmentalfactors

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Hypertrophy of the circular

muscle of thepylorus( dueodenem is normal)

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  First born male child

 

Males 4:1

  Onset at 2-8 weeks of age, commonlyat around one month of age

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  o!ee ground vomitus due toassociated gastritis

  "tarvation stools

 

#ehydration & $eight loss

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 Elongated narro$ pyloric channel

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%ltrasound adomen

 

 to loo' for the thickened *+mm and

elongated>15mm pylorus(doughnut sign)

  Gold standard at present, ut needs an

eperienced sonologist

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  Hypochloremic hypokalemicmetabolic alkalosis

 

#ehydration, al'alosis & electrolytes toe corrected prior to surgery - may ta'eupto .4 hours

  /luid 0 + detrose in 2*4+ normal salinecontaining .2 to 42 mE35 of potassium

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