Collapse-resistant swellable catheter
AssigneeBecton, Dickinson and Company
InventorsGary Searle, Charles G. Hwang
Life of this patent
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Abstract
An infusion system comprising a base, a pump, a fluid tubing set that connects the pump and the base, and a collapse-resistant catheter extending from the base and comprising a swellable inner element including one or more indents, and a non-swellable flexible outer sleeve covering an outer wall of the inner element, wherein when the swellable inner element absorbs liquid, the swellable inner element swells and the one or more indents control a direction of the swelling by causing the swellable inner element to fold inwardly.
Claims20
An infusion system comprising:
- a base;
- a pump;
- a fluid tubing set that connects the pump and the base;
- and
- a collapse-resistant catheter extending from the base and comprising:
- a swellable inner element including a swellable segment and a connective segment forming a catheter orifice;
- and
- a non-swellable flexible outer sleeve covering an outer wall of the inner element;
- wherein when the swellable inner element absorbs liquid, the swellable inner element swells in volume within the non-swellable flexible outer sleeve, the swellable segment increases in size, the connective segment folds, and the catheter orifice decreases in size while remaining open.
A patch pump comprising:
- a housing;
- a pump in the housing;
- and
- a collapse-resistant catheter comprising:
- a swellable inner element including one or more indents a swellable segment and a connective segment forming a catheter orifice;
- and
- a non-swellable flexible outer sleeve covering an outer wall of the inner element;
- wherein when the swellable inner element absorbs liquid, the swellable inner element swells in volume within the non-swellable flexible outer sleeve, the swellable segment increases in size, the connective segment folds, and the catheter orifice decreases in size while remaining open.
A collapse-resistant catheter comprising:
- an inner element including a swellable segment and thin a connective segment forming a catheter orifice;
- and
- a flexible outer sleeve covering an outer wall of the inner element;
- wherein
- the inner element comprises a swellable material;
- the flexible outer sleeve comprises a non-swellable material;
- and
- when the inner element absorbs a portion of the liquid, the inner element swells in volume within the flexible outer sleeve, the swellable segment increases in size, the connective segment folds, and the catheter orifice decreases in size while remaining open.
A collapse-resistant catheter comprising:
- a plurality of disconnected inner elements each including a swellable segment and a connective segment;
- a flexible outer sleeve covering and being fixed to an outer wall of each of the plurality of inner elements;
- and
- retention tabs on an inner surface of the outer sleeve that attach to an outer surface of the swellable segment;
- wherein
- the inner element comprises a swellable material;
- the flexible outer sleeve comprises a non-swellable material;
- and
- when the inner element absorbs a portion of the liquid, the inner element swells in volume within the flexible outer sleeve, and the connective segment folds inwardly.
Dependencies are inferred from the claim text.