The efficacy of intelligent thermofusion sealing in spaying and neutering operations was evaluated in comparison to ligature sealing. The postoperative inflammatory reactions were quantitatively determined by the C-reactive protein (CRP) levels measured by laser nephelometric immunoassay. The 5-109 month-old healthy dogs clinically received orchiectmy or ovariectmy. The half of the 50 male patients underwent the intelligent thermofusion sealing of the testicular vascular plexuses and the deferent canals and the other half did ligation with absorbable polydioxanone sutures. The half of the 50 female patients underwent the intelligent thermofusion method for the ovarian vascular plexuses and the suspensory ligament sealing and the other half did ligation with nonabsorbable polyester sutures. The intelligent thermofusion sealing was performed with BiClamp^® 150 and 200 instruments and VIO 300D generator. The intelligent thermofusion sealing method has significantly lower CRP values than those values of ligatation in both orchiectomy and ovariectomy. The lower values implied the milder acute inflammation ascribed to the shortened operative time and the decrease of the hemorrhage amounts. The intelligent thermofusion sealing was proved to be a low invasive surgical procedure free from suture-reactive conglutination and granuloma.

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A new surgical technique for perineal hernia was designed using polypropylene (PP) mesh and was evaluated in 30 dogs diagnosed with perineal hernia. This technique was applicable in all cases regardless of the size or condition of the hernias and did not cause any severe postoperative complications. Hernia recurred in two dogs within a year after the surgery but was successfully repaired by re-fixation of the PP mesh. In the other 28 cases, the outcome was favorable without recurrence for more than one year after the surgery. These results indicate that the technique is very useful for repair of perineal hernia.

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Three cases of canine cystic meningioma diagnosed by MRI are described. We made Nauta classification based on the imaging findings and performed surgical removal. In the case 1 and 2 of type III, the cystic wall did not demonstrate contrast enhancement on imaging. This led to a result that only solid tumors were removed. On the other hand, in the case 3 of Type II, both of the solid tumor and the cystic wall were enhanced on MRI and we were able to remove all of them. These resulted in clinical improvement in all cases. In case 1, the secretory ability of cyst was decreased. In case 2 and 3, the cysts were disappeared. In case 3, another tumor reoccurred in opposite site of the removal site post-operatively, however, the patient has been surviving for 3 years.

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A male 7-month old hamster was presented with a sudden appearance of a protruding mass from the oral cavity. The hamster was diagnosed as cheek pouch prolapse based on the clinical feature of the inverted left cheek pouch. He was grasping the cheek pouch repeatedly using forelegs to remove it. It seemed to be very difficult to put back the cheek pouch into the original position because it was tremendously edematous. Under inhalation anesthesia, the basal part of the inverted cheek pouch was seized by an ultrasonic surgical apparatus using a probe of short scissors' type, and it was excised instantly after 20 to 30 seconds operation. This surgical treatment required only 5 minutes from the beginning of anesthesia to the end of surgery, and the hamster was able to eat and drink soon after surgical treatment. This is the first report of cheek pouch prolapse in a hamster which was treated using an ultrasonic surgical apparatus.

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