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US 2017/0245977 A1Published application
Tapered helical coil bronchial valve
AssigneeBoston Scientific Scimed, Inc.
InventorsDaniel J. Foster, Brian L. Schmidt
Life of this patent
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Abstract
This disclosure concerns systems and methods for tissue volume reduction and control of the flow of substances through the body. Systems according to the various embodiments of the disclosure include check valves formed from wire coils which are deployable through a tubular lumen, such as the working channel of an endoscope, or a catheter.
Claims20
A method of treating a patient, comprising:
- disposing, in a bronchus of a patient, a check valve comprising a wire wound into a tapered coil,
- wherein (a) the tapered coil is characterized by a taper of less than one filar diameter per loop of coil when unconstrained, (b) the coil has a spring constant less than a pressure difference between inner and outer surfaces of the coil occurring during exhalation, and (c) the coil is positioned so that a wide portion of the coil is distal to a narrow portion of the coil within the bronchus.
An apparatus for regulating a flow of a substance within a body of a patient, comprising:
- a wire configured to form a tapered coil when unconstrained, the wire being further configured for insertion into the body of the patient in an elongated configuration,
- wherein (a) the tapered coil is characterized by a taper of less than one filar diameter per loop of coil when unconstrained, and (b) the coil has a spring constant less than a pressure difference between inner and outer surfaces of the coil occurring during exhalation.
A system, comprising:
- a wire configured to form a tapered coil when unconstrained;
- and
- a device selected from the group consisting of a catheter and an endoscope, the device having a lumen sized to permit insertion of the wire in an elongated configuration,
- wherein (a) the tapered coil is characterized by a taper of less than one filar diameter per loop of coil when unconstrained, and (b) the coil has a spring constant less than a pressure difference between inner and outer surfaces of the coil occurring during the flow of a substance through a body lumen from a wide portion of the coil toward a narrow portion of the coil.
1 more element
Dependencies are inferred from the claim text.