When anesthesia is used, it is a mix of anesthesia and oxygen. Also preanesthetics are used just prior to intubation (an endotracheal tube is inserted into the animal's trachea which is then connected to two tanks, one with oxygen and one with anesthetic). Blindness can result from a reaction to the preanesthetic or the anesthetic agents, but more likely will occur as a result of low oxygen, which can occur during surgery.
Normally, procedures are in place where the levels in the tanks are checked/verified before each and every surgery. I have witnessed surgeries where the oxygen tank has malfunctioned, or emptied unexpectedly. This is usually remedied quickly by changing out the tank with the spare tank, which is nearby.
Blindness can also occur due to pre-existing conditions in the animal.
I do not know if the reason for your dog's blindness can be determined, and I found no information on the statistics of permanent vs temporary occurances.
I hope your baby recovers, and that you can get some answers from the specialist.
I do know that dogs are adaptable, and many live comfortably with loss of vision.
Hope this helps, and I'll keep your little one in my prayers. |