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US 4,798,597 AGranted
Flexible composite intubation tube
OwnerVincent L. Vaillancourtinventor
Life of this patent
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Abstract
The composite intubation tube has an outer pliable outer layer of plastic material and an inner concentric layer made of a hydrophilic polymer which becomes very soft and flexible in a wetted state. After intubation in a patient, a flow of gastric fluids or an inflow of nutrient solution wets the inner layer to become very soft so that pressure points on the tissue of the patient are eliminated.
Claims16
A flexible composite intubation tube for connection to a bolus comprising
- a relatively thin outer layer of plastic material characterized in being pliable and flexible;
- and
- an inner concentric layer of plastic material defining a flow path for a fluid, said inner layer having an inner diameter of 0.080 inches and being made of a hydrophilic polymer characterized in being stiff in a dry state and in being very soft and flexible in a wetted state;
- said layers forming a tube characterized in being sufficiently pliable and self-supporting to be inserted per se into a naso-gastric passage and in being soft and flexible in a wetted state within the naso-gastric passage to avoid creating pressure points therein and without closing said lumen.
1 more element
A naso-gastric tube for connection to a bolus comprising
- a soft outer layer of plastic material of pliable and flexible nature having sufficient body to prevent tube bursting during syringe fluid injection;
- and
- an inner concentric layer within said outer layer, said inner layer defining a lumen for fluid passage and being made of a plastic hydrophilic material characterized in being stiff in a dry state to permit insertion of the tube into a naso-gastric passage and in being very soft and flexible in a wetted state within the naso-gastric passage to render the tube non-self supporting without closing said lumen to eliminate pressure points in the passage.
A naso-gastric tube for connection to a bolus comprising
- a relatively thin soft outer layer of pliable and flexible material;
- an inner concentric layer of hydrophilic material defining a lumen for passage of a fluid;
- and
- said layers being bonded together to form an integral tube characterized in being sufficiently pliable and self-supporting to be inserted per se into a naso-gastric passage and in being soft and flexible in a wetted state within the naso-gastric passage to avoid creating pressure points therein and without closing said lumen.
1 more element
Dependencies are inferred from the claim text.