BLOOD GASES. 



123 



as possible), the side tube of the pump opened* and the blood bulb 

 removed. A few drops of the anti-foaming solution (caprylic 

 alcohol or isoamylisovalerate), is placed in the receiver. This is 



FIG. 34. Apparatus for measurement of gases of blood by pump method. For 

 description, see Context. 



*The water must never be turned off from the pump while this is connected 

 with a partially or completely evacuated vessel. Always allow air into the pump 

 before turning off the water. 



