<prompt> Inveogram to be done in a new born :ImmediatelyAfter 2 hoursAfter 4 hoursAfter 6 hours  <response>: D i.e. After 6 hours Inveogram is done to detect imperforate anusQ. It is done after six hours of bihQ in infant as sufficient air may have collected in large intestine to cast a x Ray Shadow. If the distance between highest level of gas in rectum metal bougie inseed into the blind anal canal is 2.5 cmQ; the abnormality is high. In high lesion, the presence of proteus or pseudomonas in urineQ is indicative of fistula. I.V. Urogram gas in bladder also indicate, fistula, but with definite radiation risk. 