INSTRUMENTS FOR RUMENOTOMY. 
327 
is opposed to this, and states that it causes tearing. Extensive adhesion of 
the rumen to the wall of the abdomen certainly interferes with digestion. 
To prevent food infecting the peritoneal cavity, Sajoux had as eaily as 
1839 employed a trochar with movable wings by which to fix the rumen to 
the abdominal wall (Hering) ; about the same period three instruments termed 
“ gastrotomes ” were constructed by Brogniez. 
In Germany this complicated piece of apparatus was never much used, 
because it by no means absolutely prevents 
infection of the peritoneal cavity, on the con¬ 
trary, as it requires great care and cleanliness 
to keep it in perfect condition, it is frequently 
unavailable when most wanted. 
The trochar constructed by Brauer (fig. 149), 
on the contrary, appears simpler and more i0i _ 
practical. Its canula is so wide that the food sUeatli of Brauer’s trochar. 
may be removed through it from the rumen by 
using a pair of forceps. The handle and the greater part of the stilette con¬ 
sist of wood; the latter is flattened, and ends in a cutting part, which is 
formed by the union of two knife-shaped portions of steel, which come 
