A study of 128 jaundiced term neonates showed that 28 (22 per cent) had hearing loss based on brain stem-evoked response. There was no significant difference in the percentage of neonates with hearing loss between those with peak serum bilirubin levels of less than 340 mumol/l (16 per cent) and those with hyperbilirubinaemia > 339 mumol/l (33 per cent) (P = 0.11). Logistic regression analysis showed that severe jaundice which required exchange transfusion and earlier age of onset of hyperbilirubinaemia were statistically significant risk factors associated with hearing loss (P = 0.038 and P = 0.012, respectively).
Esophagotomies were performed on 36 dogs and closed with 3-0 polydioxanone in double-layer simple interrupted, single-layer simple interrupted, or single-layer simple continuous patterns. The operative time was shortest for single-layer simple continuous closure, followed by single-layer simple interrupted and double-layer simple interrupted, respectively. Three dogs with each suture pattern were euthanatized at hours 0 and 1, and days 4 and 28 after surgery. The esophagotomy incisions were subjected to bursting strength testing and examined microscopically. The bursting wall tension was higher for all three suture pattern groups at 28 days than at 0 and 1 hour. The double-layer closure had higher bursting wall tension than the single-layer closures at 0 hour and 4 days. Single-layer simple continuous closure had the lowest bursting wall tension for each time period. Single-layer simple interrupted closure had the highest bursting wall tension at 28 days. Microscopic examination revealed close approximation of tissue planes for the double-layer closure and mucosal eversion for the simple interrupted and simple continuous single-layer closures. Healing was superior histologically with the double-layer closure.
Maxillary‐mandibular wiring was used for mandibular immobilisation and maintenance of proper dental occlusion in two cats with caudal mandibular fractures. Alimentation was provided to one cat via a gastrostomy tube and to the other cat via a nasogastric tube during the seven day period the maxillary‐mandibular wires were maintained. Both cats had normal occlusion and mandibular function at the time of discharge from the hospital and at follow‐up examination.
Intermittent open mouth locking occurred in a Persian cat as the result of impingement of the left coronoid process of the mandible on the ipsilateral zygomatic arch. The condition was treated successfully by partial zygomatic arch ostectomy.
SummaryA Salter IV physeal fracture of the humeral condyle in a three-month-old Chow-Chow was repaired using a cannulated screw to provide interfragmentary compression. The fracture was reduced and a Kirschner wire was placed at the level of the olecranon fossa. The AO/ASIF cannulated screw system facilitated screw placement directly over the Kirschner wire, and thus allowed the screw to be placed proximal to the distal humeral growth plate without interfering with elbow extension. Limb and elbow function were normal when the dog was examined eight weeks following surgery. Radiographic union of the fracture had occurred without complication.
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