312 



EXPERIMENTAL PHARMACOLOGY 



By a median longitudinal incision open the thorax. For 

 the method of giving ether when the chest is open see Figs. 



Loose ligature 

 -Sawed edqe of sternum 



Left pulmonary artery 

 Left pulmonary veins 



Lunq, partially 



inflated 

 Pericardium 

 over heart 



.... ^phrenic nerve 

 snowing over pericardium 



Fig. 274. Dissection showing the method of lifting up the left pulmonary artery 

 with an aneurism needle and tying a ligature loosely around the artery far out next to 

 the lung tissues. 



Hemostet 



First ligature tied and 

 fastened on wall of chest 



Second loose ligature 

 on pulmonary artery 



T.T.H. 



Fig. 275. The first ligature is tied tightly (at the edge of the lung) and with 

 a hemostat the end of the ligature is clamped to the edge of the chest wall in such a 

 manner as to lift up and support the. outer end of the artery (and the left lung). A 

 second (loose) ligature is placed around the artery ready to tie in the cannula. 



53 and 107. TVith four large ligatures tie the chest widely 

 open as shown in Fig. 106. 



Consult the Figures and seek for the left pulmonary 



