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The nitrone-based free radical scavengers have potent neuroprotective activities in models of stroke in which oxidative stress plays a key role in its development. We examined the effects of S-PBN (sodium 4-[(tert-butylimino) methyl]benzene-3-sulfonate N-oxide), a spin trap nitrone, on reperfusion injury in rat peripheral nerves. Immediately after the onset(More)
BACKGROUND Colorectal cancer is the second most common type of solid organ cancer in New Zealand behind prostate cancer. Even with treatment, distant disease may develop in the liver and lungs. Surgical resection of isolated liver and/or lung metastasis is now commonly considered, but survival outcomes from the latter are not well described. This study aims(More)
OBJECTIVE To describe the fate of perforator veins after surgical treatment of varicose veins and factors that influence this. METHODS This prospective study of 104 patients assessed perforator veins by using duplex ultrasound scanning in 145 limbs before superficial vein surgery for varicose veins. Veins were marked preoperatively with ultrasound(More)
BACKGROUND Underuse of implantable defibrillators has been previously noted in patients at risk for sudden cardiac death, as well as for survivors of sudden cardiac death. We sought to determine the utilization rates in a primary prevention implantable cardioverter-defibrillator (ICD)-eligible population and mortality in this group compared with a group(More)
We present new results for three problems dealing with a set <i>P</i> of <i>n</i> convex constant-complexity fat polyhedra in 3-space. (i) We describe a data structure for vertical ray shooting in <i>P</i> that has <i>O</i>(log<sup>2</sup> <i>n</i>) query time and uses <i>O</i>(<i>n</i> log<sup>2</sup> <i>n</i>) storage. (ii) We give an algorithm to compute(More)
In this paper we consider imprecise terrains, that is, triangulated terrains with a vertical error interval in the vertices. In particular, we study the problem of removing as many local extrema (minima and maxima) as possible from the terrain. We show that removing only minima or only maxima can be done optimally in O(n log n) time, for a terrain with n(More)