326 THE ABDOMEN AND PELVIS 



peritoneum. In the former case,, the apex of the kink is directed 

 upwards, and the proximal and distal limbs of the ileum, 

 respectively, ascend and descend ; in the latter case, the condition 

 is exactly reversed. 



It is generally stated that these bands result from attacks 

 of appendicitis, but Lane urges that those which hold the ileum 



FIG. 102. Partial Prolapse of the Caecum. The Bismuth is also visible in 

 the Vermiform Process, which passes towards the left and then turns 

 downwards into the pelvis. The vermiform process in this radiogram 

 resembles the appearance of a "Lane's Kink," but, at the subsequent 

 operation, it was found in the position shown in the figure and with the 

 bismuth still in situ. 



up in the abdomen are produced naturally to give support to a 

 prolapsing caecum. The kinks may be observed in radiograms 

 taken from ten to twelve hours after a bismuth meal. The 

 constricted portion of the terminal part of the ileum is recognised 

 by the narrow shadow of the contained bismuth, while the 

 stronger wide shadows represent the proximal limb of the kink 

 and the caecum, which can be identified by its characteristic 



