Warwick A Ames

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Neurosurgical patients presenting for laminectomy surgery may have premorbid pathology that either contraindicates general anaesthesia or at least represents a significant risk to the patient. We present a sample case from a series of ten patients in whom laminectomy surgery was performed under local anaesthesia. The mean duration of surgery was 98 minutes(More)
BACKGROUND An immature coagulation system coupled with the hypothermia and hemodilution associated with cardiopulmonary bypass (CPB) in infants makes the activated clotting time (ACT) an ineffective monitor for anticoagulation in this population. The Medtronic HMS Plus Hemostasis Management System (HMS; Medtronic, Inc., Minneapolis, MN, USA) is shown to(More)
Magnesium is an ionised mineral with therapeutic uses. There is laboratory evidence that it may have an anticoagulant activity although recent research has been to the contrary. The clinical implications of the effect of a therapeutic dose of magnesium on coagulation have yet to be resolved conclusively. In our study, 10 healthy volunteers were given 4 g of(More)
BACKGROUND An intriguing potential clinical use of cerebral oximeter measurements (SctO2) is the ability to noninvasively estimate jugular bulb venous oxygen saturation (SjvO2). Our purpose in this study was to determine the accuracy of the FORE-SIGHT(®) (CAS Medical Systems, Branford, CT), which is calibrated to a weighted average of 70% (SjvO2) and 30%(More)
'Cardiomyopathy' (CM) is defined by the World Health Organization as 'a disease of the myocardium associated with cardiac dysfunction'. In a child, it is associated with a significant risk for anaesthesia. In addition, cardiac arrest under anaesthesia has been attributed to an undiagnosed CM. Care of these patients is complicated by the fact that there are(More)
PURPOSE Several methods have been described to locate the epidural space, but the loss-of-resistance (LOR) technique is the most commonly used. Expert opinion states that LOR to air is the best medium for neonates and infants. We conducted a Canada-wide postal survey to determine the current state of practice for placement of epidural catheters in pediatric(More)
BACKGROUND Moebius sequence is a rare congenital absence of the sixth and seventh cranial nerves, although there may be additional congenital cranial neuropathies. Developmental delay, cardiac and musculoskeletal abnormalities may also co-exist. Oro-facial manifestations include bilateral facial nerve palsy resulting in a mask like facies, drooling,(More)