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Nasogastric tube antireflux valve

  • US 4,735,607 A
  • Filed: 05/12/1986
  • Issued: 04/05/1988
  • Est. Priority Date: 05/12/1986
  • Status: Expired due to Term
First Claim
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1. A method for removing fluids from the stomach or upper intestine of a patient by means of a double-lumened nasogastric tube having a proximal end and a distal end, the tube including a suction lumen and a vent lumen open to ambient, and for preventing reflux of stomach contents through the vent lumen, the method comprising a step of inserting the distal end of the tube through the nasal canal and esophagus into the stomach or small intestine, and a step of applying suction to the proximal end of the suction lumen, the vent lumen including a one-way valve, the one-way valve pasing ambient air into the distal end of the tube through the vent lumen when pressure at the distal end of the vent lumen is less than ambient pressure and closing the vent lumen when pressure at the distal end of the vent lumen exceeds ambient pressure to provide a closed column of air in the vent lumen and prevent fluid from escaping the stomach or small intestine through the vent lumen.

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