MEDICO-SURGICAL TUBE INCLUDING IMPROVED MEANS FOR ADMINISTERING LIQUID OR GAS TREATMENT

摘要

A medical-surgical tube having a major lumen defined by an innerperiphery of a wall of the tube, an injection lumen within the wall of thetube, and atleast one one-way valve in the wall. The valve allows fluid to flow from theinjectionlumen through an outer or inner periphery of the wall of the tube and preventsreturn ofthe fluid back into the injection lumen. The tube can include a plurality ofspaced-apartvalves. The valve can be a piercing in the wall of the tube which is definedby opposedsurfaces resiliently biased against each other and extending from theinjection lumen tothe outer or inner periphery of the wall of the tube.Methods of manufacturing a medical-surgical tube having a major lumendefined by an inner periphery of a wall of the tube, an injection lumen withinthe wall ofthe tube, and at least one one-way valve in the wall. One method includesprojecting apiercer such as a needle into the injection lumen, bending the tube in aslightly bentconfiguration and pushing a point of the needle through a portion of the tubewall locatedbetween the injection lumen and the outer or inner periphery of the tube. Whenaplurality of piercings are made, the needle can be backed up in the injectionlumen, thetube can be advanced and the needle can again be pushed forward to formanotherpiercing in the bent tube. Alternatively, the piercer can be pushed into theinner or outerperiphery of the tube, through the wall and into the injection lumen. Theneedle can havea thin diameter and the method can be performed such that a tapered point ofthe needlepasses part way or entirely through the wall of the tube when the valve isformed.