POST-OPERATIVE COMPUTED TOMOGRAPHY IN TWO DOGS WITH CEREBRAL MENINGIOMA

Post-operative computed tomography (CT) has been described as a technique for diagnosing incomplete resection or recurrence of cerebral neoplasms in humans. The characteristics of immediate postoperative CT images in dogs with intracranial pathology are unknown. This report describes findings from preoperative, immediate post-operative, and 4 week to 9 month follow-up CT examinations in two dogs with histologically-confirmed cerebral meningiomas. In images of one dog after surgery there was mild contrast enhancement of the tissue surrounding the surgical site. This enhancement had resolved in later images and was probably the result of surgically induced trauma. In post operative images of the other dog there was significant hyperattenuation of the tissues around the surgical site. In post contrast images there was increased enhancement that was evident in later images. These findings, although not supported by necropsy, probably indicate incomplete excision of the tumor.     

Evaluation of an anaesthetic technique used in dogs undergoing craniectomy for tumour resection

ObjeCTIVE: To evaluate a total intravenous anaesthetic technique in dogs undergoing craniectomy. STUDY DESIGN: Prospective clinical study. ANIMALS: Ten dogs admitted for elective surgical resection of rostro-tentorial tumours. METHODS: All dogs were premedicated with methadone, 0.2 mg kg(-1) intramuscularly 30 minutes prior to induction of anaesthesia. Anaesthesia was induced with propofol administered intravenously (IV) to effect, following administration of lidocaine 1 mg kg(-1) IV and maintained with a continuous infusion of propofol at < or =0.4 mg kg(-1) minute(-1) during instrumentation and preparation and during movement of the animals to recovery. During surgery, anaesthesia was maintained using a continuous infusion of propofol at 相似文献   

Middle ear tumours with brainstem extension treated by ventral bulla osteotomy and craniectomy in two cats

Two geriatric domestic shorthaired cats (DSH) were treated surgically with a ventral bulla osteotomy and craniectomy for middle ear tumours that invaded the calvarium. Both cats had a history of vestibular disease. One cat had a normal neurological examination. Both cats underwent computed tomographic imaging of the head. After intravenous injection of an iodinated contrast material, one cat had a ring‐enhancing intracranial lesion and the other had a uniform contrast‐enhancing intracranial lesion, which either communicated with the bulla or was associated with bulla osseous lysis/production. One cat had a papillary adenoma and the other had an adenocarcinoma. Both cats had prolonged survivals (630 days; alive and lost to follow‐up at 840 days), which is longer than reported in cats with middle ear neoplasia. Craniectomy, in addition to ventral bulla osteotomy, may be part of the treatment plan for middle ear tumours that invade the calvarium.     

Cardiac arrhythmias associated with acute major haemorrhage during craniectomy in a dog

An estimated 43% of total blood volume was lost during craniectomy in a 32‐kg Labrador retriever. One episode of bradycardia, followed by ventricular tachycardia occurred during surgery when the rate of haemorrhage exceeded fluid replacement. Sinus rhythm was re‐established with intravenous lidocaine (1.25 mg kg^?1). Twenty‐four hours later, premature ventricular complexes appeared followed by episodes of ventricular tachycardia, some requiring lidocaine treatment. Myocardial hypoxia resulting either from hypovolaemia and/or air embolism (the right transverse venous sinus was damaged during surgery) may have caused the arrhythmias. Mild intracranial hypertension may have aggravated the problem.