04/12/2019
In an invertogram, which is an X-ray investigation in which a metal object is taped over the a**l dimple, the child is held up side down while an X-ray is made of the pelvis in a lateral projection. This is only useful 24 hours or more after birth as gas needs to reach the distal re**um.
It is used to investigate the extent defect in the a**l or re**al atresia. The a**s is marked with radio opaque marker, the baby is inverted. A lateral radiograph is taken in the air, the re**um will rise to the highest point, giving an indication of the extent of the atresia.
: an alternative to the invertogram in imperforate a**s.
The prone cross-table lateral radiograph provides equal or sometimes better information, compared to the invertogram, for demonstration of the level of re**al atresia in neonates. Easy positioning, better cooperation of the patient, elimination of the effect of gravity, and better delineation of the re**al gas shadow are the advantages of the prone lateral view. Among the 45 cases compared, equal findings were noted in 37, but in eight babies the level of re**al atresia was more caudal in the prone radiograph than in the invertogram.
