CHATTANOOGA, TN (Times Free Press) -- Lexie was on the losing end of a dogfight.

Worst was a punctured lung. As a result, the 13-pound Shih Tzu/schnauzer mix developed a life-threatening, drug-resistant infection.

Lexie's owners, Bert and Sharon Brown of Ooltewah, took her to the Regional Institute for Veterinary Emergencies and Referrals (RIVER) on Amnicola Highway, where she received treatments in one of only two hyberbaric chambers used by veterinarians in Tennessee. The other chamber -- which provides super-high levels of oxygen -- is at the University of Tennessee College of Veterinary Medicine in Knoxville.

Bert Brown credits the hyberbaric chamber for saving Lexie's life.

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