Clinical usefulness of four different kind of patch grafts for the diaphragmatic defect was compared in the cat. We evaluated two biograf is (glutaraldehyde treated canine pericardium and denacol treated canine pericardium), and two artificial fabrics (polyester nonwoven fabric and chitin-polyester nonwoven fabric complex) in experimentally made diaphragmatic defects (3×3cm) using 12 healthy cats. One month after the grafting with biografts, graft materials and surrounding diaphragm tissue united well and minimum inflammation was investigated 12 months after the grafting. Artificial fabrics and surrounding diaphragm tissue also united well, however, inflammation had sustained 12 and 24 months after the grafting.
A two-month-old female mongrel dog with open tibial fracture associated with infection and a 4 cm bone defect was treated by the callus distraction (callotasis) method. The local wound was cleaned with hydrogen peroxide solution and by debridement. The tibia was fixed with a halfpin system and was temporally shortened by 2 cm to minimize the gap and not disturb the bone formation there. After confirming callus formation on a radiograph fourteen days after surgery, the callus was distracted by hand for 5 mm four times at a 7 days interval. The bone loss was finally replaced with newly formed callus and the external fixator was removed sixty days after surgery. This method is thus one of a surgical choice to treat fracture associated with bone defect.