452 CLINICAL VKTERINARY MEDICINE AND SURGERY. 



This was punctured, and the cavity washed out ; the foot was then 

 immersed in lysol sohition, and again dressed with cotton wool. 



During the following days the condition improved ; the tempera- 

 ture fell to 38'o° C. and more weight was placed on the foot. 



On the 1 2th the dressing was removed ; the operation wound was 

 healing well, as was that produced by opening the abscess. On the 

 i6th the abscess wound had closed. 



The animal left hospital on the igth. Lameness was still marked, 

 but the horse walked well enough to return to its own stable. 



156. A seven-year-old entire horse, left in hospital 25th September, 

 1897. Suffering from picked-up nail in the middle zone of the foot. 

 Operation had been unsuccessfully performed. 



State on Examination. — The off hind leg was the seat of frequent 

 darting pain ; in the intervals the foot was rested on the toe. Lame- 

 ness was very severe, the toe being dragged along the ground. The 

 parts, moreover, were very hot and sensitive. The operation wound 

 was surrounded by fungous granulations, which masked a sinus dis- 

 charging coagulated, foetid pus. The navicular bone was not exposed 

 at any point, previous operation having been confined to the plantar 

 cushion and the superficial layer of the aponeurosis. Despite these 

 grave local and functional symptoms the general state was fairly good, 

 and the appetite preserved. Temperature 38"4'^ C. 



Treatment. — The foot was pared, disinfected, and surrounded with a 

 peat wool dressing, continually moistened with carbolic solution. 



On the 26th, the animal having been cast on the table, the com- 

 plete operation for picked-up nail was performed. The lower surface 

 of the navicular bone appeared roughened, and was already granu- 

 lating at points. Part of the right half of the perforans tendon 

 showed necrosis, which extended a considerable distance upwards. 

 In excising this, one of the synovial sheaths in the flexure of the 

 pastern, without doubt the cul-de-sac of the great sesamoid sheath, was 

 accidentally opened. A jet of synovia escaped from the wound. 



A counter-opening was made in the flexure of the coronet, and a 

 gauze drain passed ; after carefully cleansing the wound, the fragment 

 of necrotic tissue left on the tendon was touched with tincture of 

 iodine. The parts were enveloped in an iodoform dressing. 



On returning to the stable the horse began to eat. During the 

 night the general disturbance was very trifling. 



During the following days the chief functions were normal ; the 

 temperature did not rise beyond 3g'3° C. For a week the foot was 

 rested on the toe, and signs of severe stabbing pain were evident. 



On the 2nd October the dressing was renewed. The base of the 

 wound was granulating, and the wound in the synovial membrane had 

 healed. 



From the 5th pain diminished, more weight was placed on the 

 limb, and the foot was at times rested flat on the ground. 



On the 9th the dressing was removed. A considerable quantity of 

 pus was found in the wound, which, however, was granulating through- 

 out, except where the drain had been passed. It was washed out with 



