96 ANTISEPTIC TREATMENT OF WOUNDS. 
an immediate operation is always indicated, for should we in 
these cases tise such treatment as mentioned formerly and wait 
for the result, we would as a rule notice an increased pain, set- 
ting in of tever, etc., etc., which is a sign of spreading of the af- 
fection, which makes a success of the operation more or less 
doubtful. 
In all other cases in which the flexor pedis perforans re- 
mained intact, say that either the frog cushion, or only, the os 
pedis is injured, an operation is only then necessary if necrosis 
sets in deeply, or if the pain without any further visible cause 
continues in the same spot longer than from 8 to 14 days, or if 
finally some complications arise (remaining of a portion of the 
injuring body, suppuration, etc.). 
In performing the operation I use the folowing modus oper- 
andi: 
After casting the horse, the injured foot is tied on top of 
the diagonal foot and an Esmarch compress bandage is applied. 
As I lay the horse on the affected side, the sole of the foot, 
which is as a rule the field of the operation, on account of the 
above-mentioned mode of tying (on the diagonal foot), is 
turned upwards, and thus permits a full view of the field of 
operation. Within the opening of the puncture (to a circum- 
ference of from a quarter to a half dollar piece) the already 
previously thinned sole or frog is entirely cut down, the whole 
hoof having been previously cleaned with soap and water and 
disinfected by pouring a solution of sublimate water on it. 
Then the soft parts, by means of a disinfected laurel leaf knife, 
are cut down in cone form, so that the point of the cone is lo- 
cated at the base of the puncture canal, while the axis is 
formed by the punctured canal itself. The base of this cone 
corresponds in regard to circumference and location ‘o the sur- 
face of the sole as well as frog of which the horn has been re- 
moved. We don’t need to be too anxious in regard to that, 
especially regarding the frog, as no tissue grows and regen- 
erates as well as the hoof matrix, so that I have frequently cut 
out the whole fleshy frog, without any damage to its shape 
and formation, 
