Self-lubricated catheters
AssigneeHollister Incorporated
InventorsShamsedin Rostami, Joel D. Shutt
Life of this patent
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Abstract
A catheter assembly includes at least one self-lubricated part formed from a mixture including a polymer and lubricant. The polymer has a functional group that can react with the functional group of the lubricant. The suitably functionalized lubricant provides for a low coefficient of friction surface for easier and less traumatic insertion and withdrawal of the catheter into and from body cavities.
Claims28
An intermittent urinary catheter comprising:
- a catheter shaft formed from a mixture, the mixture comprising:
- an amine containing lubricant in an amount of about 0.05 percent by weight (wt. %) to about 20 wt. % of the mixture;
- a polymer, the polymer having a functional group that can react with an amine functional group of the amine containing lubricant;
- and
- the catheter shaft having an outer surface formed from the mixture wherein the outer surface has a coefficient of friction of less than about 0.3.
A multilayer intermittent urinary catheter shaft, comprising:
- a coextruded tube including:
- an outer extruded layer formed from a mixture including:
- an amine containing lubricant in an amount of about 0.05 wt. % and to 20 wt. % of the mixture;
- and
- a first polymer, the first polymer having a functional group that can react with an amine functional group of the amine containing lubricant;
- an inner extruded layer, the inner layer formed from a second polymer;
- and
- the outer layer defining an outer surface formed from the mixture wherein the outer surface has a coefficient of friction of less than about 0.3.
An intermittent catheter assembly including at least one self-lubricated part, the at least one self-lubricated part comprising:
- a functionalized polymer containing a first functional group;
- and
- a functionalized lubricant containing a second functional group that can react with the first functional group,
- wherein the functionalized polymer and the functionalized lubricant are melt mixed to form a mixture, and wherein the at least one self-lubricated part includes an outer surface that is formed from the mixture and has a coefficient of friction of less than 0.3.
Dependencies are inferred from the claim text.