METHOD FOR FORMING A MEDICAL DEVICE WITH A POLYMER COATED INNER LUMEN
First Claim
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1. A catheter shaft, comprising:
- an inner layer comprising a polymer that is water soluble or water dispersible prior to curing and is not water soluble after curing, the polymer including polyvinyl alcohol, polyethyleneoxide, polyethyleneglycol, polyvinylpyrrolidone, carboxymethylcellulose, hydroxyethylcellulose, or mixtures thereof;
a reinforcing layer disposed over at least a portion of the inner layer; and
an outer layer disposed over at least a portion of the inner layer and at least a portion of the reinforcing layer.
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Abstract
A medical device, such as a catheter shaft, having an inner lumen defined by a layer of polymer coating, and a method for forming such a medical device. In some embodiments, the method generally includes the steps of applying a polymer coating to an elongated mandrel, and constructing the remainder of the catheter shaft body around the polymer coated mandrel. In some embodiments, the polymer coating layer is made from water dispersible polymer or water soluble polymer.
144 Citations
20 Claims
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1. A catheter shaft, comprising:
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an inner layer comprising a polymer that is water soluble or water dispersible prior to curing and is not water soluble after curing, the polymer including polyvinyl alcohol, polyethyleneoxide, polyethyleneglycol, polyvinylpyrrolidone, carboxymethylcellulose, hydroxyethylcellulose, or mixtures thereof;
a reinforcing layer disposed over at least a portion of the inner layer; and
an outer layer disposed over at least a portion of the inner layer and at least a portion of the reinforcing layer. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A catheter shaft formed by the process comprising:
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providing an elongated mandrel;
providing an aqueous coating solution including water and a water soluble polymer dissolved in the water, wherein the water soluble polymer comprises polyvinyl alcohol, polyethyleneoxide, polyethyleneglycol, polyvinylpyrrolidone, carboxymethylcellulose, hydroxyethylcellulose, or mixtures thereof;
applying the aqueous coating solution to the elongated mandrel to define a polymer coating layer on the mandrel, wherein the polymer coating layer is a generally continuous layer of the water soluble polymer, and wherein the generally continuous polymer coating layer comprises the water soluble polymer that is water soluble or water dispersible prior to curing, and is not water soluble after curing;
disposing at least one additional layer around a portion of the polymer coating layer, wherein the one additional layer includes a reinforcing layer; and
removing the elongated mandrel to expose an inner lumen at least partially defined by the polymer coating layer. - View Dependent Claims (9, 10, 11, 12)
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- 13. A catheter shaft including an inner layer comprising a polymer that is water soluble prior to curing, and not water soluble after curing, the inner layer defining an inner lumen.
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20. A medical device shaft, comprising:
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a polymeric layer comprising polyvinyl alcohol, polyethyleneoxide, polyethyleneglycol, polyvinylpyrrolidone, carboxymethylcellulose, hydroxyethylcellulose, or mixtures thereof; and
one or more additional layers disposed on the polymeric layer.
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Specification