of a partial Obstruction of the Circulation. 503 



together, with the happiest effects, till they could, with safety 

 to the patient, be gradually discontinued. In all cases we must 

 be guided by the nature of the existing symptoms. When 

 reaction takes place speedily, it is to be promoted and kept 

 up for sometime until a determination to any of the internal 

 organs indicates the necessity of loosening one or more of the 

 tourniquets, which are to be again tightened on the re-ap- 

 pearance of any symptoms of collapse. 



Use of partially obstructing the circulation in Syncope, in 

 apparent Drowning, and in Exhaustion. 



The late Mr. Hyslop* having bled a lady to syncope, be- 

 came alarmed at its long continuance, but on accidently 

 raising her from the horizontal position by grasping her 

 arms, and thus supporting the weight of her body, she ra- 

 pidly recovered. Surprised at this, Mr. Hyslop was led to 

 reflect what could be the cause of so sudden a restoration 

 of the hearths action, and he became convinced, that whilst 

 elevating the body, and allowing its weight to be supported 

 by that part of the arms along which the brachial arteries 

 pass, he must have compressed those vessels, the effect of 

 which compression was an impediment to the flow of blood 

 through these arteries, and consequently caused an accumu- 

 lation of blood in the heart, from which he concluded that 

 the rapid recovery of this patient from syncope was analo- 

 gous to the artificial process of transfusion ; and he proposed 

 to adopt it in cases of syncope or apparent drowning, in 

 order to revive the heat. 



In many severe diseases, the patient after recovering from 

 the dangerous symptoms, sinks into a state of collapse and 



* See Dr. Wardsop on Diseases of the Heart. Part I., p. 18, Lond. 1839. 



