Fractures of the bones of the face.—These occasionally occur, and when over the cavities of the nose produce depression, disfigurement, and impeded respiration, owing to the lessening of the caliber of the nasal passages.
When such accident occurs, the depressed bone should be gently forced back to place by introducing the finger in the nostril, or if the fracture is too far up for this, a probe may be passed and the parts retained by placing immediately over it a plaster of thin leather or strong canvas smeared with tar, extending out to the sound surroundings, taking care to embed the hair over the fractured portion in the tar of the plaster, so that it will be firmly held and prevented from again becoming depressed. If only one nostril is involved, the depressed portion may be held in position by packing that nostril with absorbent cotton. This practice, however, has the objection of giving the animal great discomfort and in some cases a disposition to aggravate the injury.
Fracture of the skull (cranium).—Fractures of the bones forming the cavity in which the brain is situated are, owing to their strength, comparatively rare among cattle. Such an accident can only be the result of external violence, and it is hardly possible that it could occur without some fragment of the broken bone pressing upon the brain so as to cause coma or other severe nervous derangement, or even death.
If the animal survives the first shock, the efforts should be directed toward relieving the pressure, which may be done by making an opening in the bone (trephining), and with a hook drawing the depressed part outward. Interference is not so liable to be attended with good results as to be warranted in all cases. The effects of a very severe shock which may not have produced a fracture, although the symptoms were alarming, will in many cases pass off, leaving the animal in a better condition than if an operation had been performed.
Fracture of the lower jaw.—This occasionally occurs, and is more liable to result from the kick of a horse than from any other cause. The front part of the jaw may be split or shattered in any direction in which the force may have been applied. Bloody discharges from the mouth and failure to eat or ruminate are symptoms most likely to attract attention.
The treatment is simple and consists in first removing detached pieces of bone, then drawing the parts together and retaining them by means of pieces of copper wire fastened around the teeth, and feeding the animal on sloppy feed until recovery takes place. The wound should be dressed once or twice a day with a 3 per cent solution of carbolic acid, forced gently in with a syringe, so as to remove any feed which may have become impacted and interfere with the healing process.
Fracture of the vertebra (spinal column).— This is not so common among cattle as other animals. If the fracture should be through the body of the bone, there may be pressure on or laceration of the spinal cord, causing paralysis of all parts posterior to the seat of injury. Fractures of the prominences on a vertebra occasionally occur without interfering with the canal in which the spinal cord is situated. Such accidents are liable to pass unnoticed, for, although the animal may suffer considerable pain, it may not be manifested in such way as to attract attention, and the deep covering of muscles serves effectually to conceal the injury. When the fracture occurs in the upper part of the neck, paralysis of the muscles used in respiration must result, and death from asphyxia very shortly ensues. The more common accident is to the loins, and when a fracture of the body of a vertebra occurs in this region so as to produce pressure on the spinal cord, paralysis of the hind legs and quarters is the result. Diagnosis of such an accident is more difficult than in the case of any other fracture. The parts can not be moved one upon another so that crepitus is noticeable. The heavy coating of muscles conceals irregularities of shape, which otherwise may attract attention. About the only reliable symptom is paralysis or loss of use and sensation of the parts posterior to the injury. Careful examination may reveal the seat of the injury. If it was the result of a blow, there may be some abrasion of the skin. The diagnosis is only important as an aid in determining the proper course to pursue.
If paralysis is present and a depression or irregularity of the spinal column is so apparent as to leave no doubt of the existence of a fracture, the only alternative is to destroy the animal, for of recovery there can be no hope. If, on the other hand, the paralysis is incomplete and there is no depression or irregularity of the spinal column or other evidence of fracture, the patient should be made as comfortable as possible by being placed in a well-bedded box stall and a few days permitted to elapse before the case is abandoned. The symptoms last described may possibly be the result of a severe strain of the muscles of the loins, in which case an improvement will soon be noticeable.
Fractures of the pelvis.—The pelvis, or bony framework which gives shape to the posterior part of the body, is liable to fracture in many ways. A common one is by a separation of the two bones which constitute the whole pelvis along the bottom and center line (symphysis pubis). In early life the two bones are separate and distinct. The union between them, which is at first cartilaginous, undergoes a change and is converted into bone, so that in adult life the whole pelvis is practically one bone. The point on which the two bones are united is weaker than the adjoining parts of the bone. When an animal slips violently, spreading the legs wide apart, the weaker materials give way and the bones are divided. If the accident is noticed when it occurs, it is likely to throw light on the nature of the injury. The animal will immediately go stiff behind, the legs being spread apart. Further examination may be made by introducing the hand, previously carefully oiled, into the rectum or vagina and pressing down along the central line, which will cause the patient to evince acute pain. In this case no appliance can be used to advantage. The animal should be tied in a stall until the parts become reunited and the lameness disappears.