Abstract: A surgical access port comprises an instrument guide. The instrument guide comprises a proximal end, a distal end, a plurality of instrument guide channels between the proximal and distal ends, and an outside surface that fits closely to an inner wall surface of a cannula into which the instrument guide is inserted. The instrument guide also comprises a first guide channel opening defined along a length of a first guide channel of the plurality of instrument guide channels. The instrument guide also comprises a second guide channel opening defined along a length of a second guide channel of the plurality of instrument guide channels. The instrument guide also comprises an insufflation channel defined between the first and second guide channel openings. The insufflation channel extends from a position between the proximal and distal ends of the instrument guide to the distal end of the instrument guide.

Abstract: An ignition, warm-up and low-load-stabilization system for furnaces fired by pulverized coal. In conjunction with a system in which pulverized coal is sent directly from a coal mill to a load-bearing nozzle and in which combustion air is brought to the nozzles from an air preheater that uses hot furnace gases to warm the combustion air, ignitor nozzles are provided that are supplied by pipes bearing coal from which the drying air has been separated. Combustion air for the ignitor nozzles is heated by an independent heat source that heats the combustion air or a portion thereof to a temperature higher than that of the air supplied by the air preheater. Such a coal-fired ignitor burner can replace oil or gas-fired ignitors and warm-up guns and thereby reduce the amount of oil or gas used in ignition, warm-up, and low-load stabilization.