EMBRYOTOMY. 83. 
thorax, immediately above the sternum; rupture the 
structures in passing into the cavity; tear away the 
first pair of ribs, to allow free passage of the hand;. 
remove the lungs and heart; puncture the diaphragm, 
and remove the abdominal organs through the opening. 
Rotation, 
Sometimes it is necessary to bring about rotatzon of 
the foetus, which means a partial turning of it to right 
or left. If either the fore or hind limbs are out of the 
passage, this is not so difficult of accomplishment, by 
cording the presented extremities, and applying traction 
in the direction the foetus is desired to take. 
If all the limbs are in the uterus, it is much more 
difficult. Cord one pair, pass in the hand, and try to 
elevate the body of the foetus, while traction on the 
cords is applied as directed. Failing in this, a sack 
or blanket, passed under the abdomen of the mother, 
and pressure applied, may bring about rotation, 
Version. 
It is sometimes necessary to cause verszon of the 
foetus. This means converting a posterior into an 
anterior presentation, and wzce versa. In this case, 
cord the limbs that are wanted into the passage, and, 
with a repeller, push the opposite extremity downwards 
and forwards into a horn of the uterus, at the same 
time applying traction to the cords. Sometimes great 
benefit is derived by elevating the body of the foetus 
with the hand, or by raising or lowering the hind- 
quarters of the parent; the treatment depending upon. 
the case. 
