RECORDING CEREBROSPINAL, PRESSURE 



159 



sure, the manometer can be moved up and down on the 

 stand. The dog's head can now be rotated back to the 

 original position and the pin put through between the 

 teeth. Mark on the glass (or record from the scale) the 

 level of the meniscus. 



Adjust the apparatus to record blood-pressure and res- 

 piration. If you have a small and very sensitive tambour 

 you may also connect this to the top of the manometer tube 



Fig. 151. Arrangement of apparatus for recording the pressure of the cerebrospinal fluid. 



(left) and try to record changes in the pressure of the 

 cerebrospinal fluid. Otherwise simply observe and write 

 down the variations which the manometer shows. Becht at 

 the University of Chicago records intracranial pressure 

 by means of a long glass tube inclined upward at a slight 

 angle from the horizontal. In this way a slight increase in 

 pressure moves the fluid in the small bore of the glass 

 tube. 



