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Pneumothorax is an accumulation of air outside the lungs, but inside the chest wall. The air outside the lung prevents the lungs from inflating normally, and can lead to lung collapse. There are several variations of pneumothorax.
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Bladder stones are rock-like formations of minerals that develop in the urinary bladder. The most common signs in dogs are bloody urine and straining to urinate. Bladder stones can develop within a few weeks, or they may take months to form. Most are visible on X-rays or an ultrasonic bladder examination. There are three main treatment options for bladder stones: surgical removal, non-surgical removal by urohydropropulsion, or dietary dissolution. Prevention is possible in some cases, depending on the chemical composition of the stones.
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One of the more common uroliths in the dog is composed of calcium oxalate crystals. Current research indicates that acidic urine high in calcium, citrates, or oxalates predisposes a pet to developing calcium oxalate urinary crystals and stones. The most common signs that a dog has bladder stones are increased frequency of urination, painful urination, and blood in the urine. Male dogs are more commonly affected and may be at risk of a life-threatening urinary obstruction. Treatment options and prognosis are discussed.
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Cystine bladder stones appear to be the result of a genetic abnormality that prevents a dog from reabsorbing cystine from the kidneys. While bladder stones in general are somewhat common in dogs, cystine bladder stones are rare. Your veterinarian may be able to palpate the stones or may need to perform imaging studies such as a bladder ultrasound or a contrast radiographic study. There are two primary treatment strategies for treating cystine bladder stones in dogs: dietary therapy to dissolve the stones, or physical removal of the stones. Cystine stones have a high rate of recurrence, despite careful attention to diet and lifestyle.
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Struvite bladder stones are one of the more common bladder stones found in dogs. Struvite bladder stones usually form as a complication of a bladder infection caused by bacteria, and if the urine becomes exceptionally concentrated and acidic. The most common signs that a dog has bladder stones are blood in the urine (hematuria) and straining to urinate (dysuria). There are three primary treatment strategies for struvite bladder stones: 1) feeding a special diet to dissolve the stone(s), 2) non-surgical removal by urohydropropulsion (flushing out the stones) and 3) surgical removal. Dogs that have experienced struvite bladder stones will often be fed a therapeutic diet for life.