THE SYMPATHETIC SYSTEM 47 



easily affected by radiology according to Regaud and 

 Cremieux, show that this method can be of value in cer- 

 tain cases of hypertension. This method should only be 

 used as an adjunct to other procedures more liable to 

 modify the glandular disturbances. It is to organo 

 therapy that we must look in most cases as the method 

 most liable to bring about results. 



IV. ORGANO THERAPY. 



This method is based on the use of the juices and ex- 

 tracts of tissues and has as chief aim, to remedy the ab- 

 sence or hypof unction of an organ, by means of extracts 

 of similar organs taken from animals. 



The extracts of organs have been utilized since 

 antiquity, but it is only since Brown-Sequard and the 

 first investigations of the treatment of myxedema w r ith 

 thyroid extract that organo therapy has become of any real 

 value. Dr. Carrion and Dr. Hallion have covered this 

 subject very thoroughly in this volume, so that there is no 

 necessity to go into any detail. 



Organo therapy can be accomplished in many ways. 

 Milk and eggs can sometimes be considered as organo 

 therapeutic products. In the same manner, certain prod- 

 ucts, such as, bile, gastric juice, are often utilized; in 

 other cases, the active principle isolated from a gland is 

 used. The typical example of this being suprarenalin, but 

 it is chiefly the organs themselves, either fresh, or their 

 extracts, obtained in various ways which constitute the 

 majority of organo therapeutic products. 



When we are using them, it is well to know what to 

 expect of them and to be warned against certain errors in 

 interpreting their action. Thyroid organo therapy, which 

 is so remarkably efficacious in myxedema has allowed us 



