Bronchial flow control devices with membrane seal
First Claim
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1. A method for modifying air flow in a bronchial passageway of a lung, the method comprising:
- advancing a delivery catheter through a bronchoscope so that a distal end of the delivery catheter and an attached flow control device protrude out of a distal end of the bronchoscope and into the bronchial passageway;
releasing the flow control device from the delivery catheter to allow a retainer region of the flow control device, which is at least partially covered with a membrane, to move from a contracted state to an expanded state to form a seal with an interior wall of the bronchial passageway to retain the flow control device in a fixed location therein; and
removing the delivery catheter from the bronchial passageway, leaving the flow control device in the passageway to modify air flow therethrough,wherein a valve member disposed in the flow control device permits air flow in an exhalation direction and limits air flow in an inhalation direction,wherein the membrane provides a fluid pathway from the seal to the valve member to direct air flowing through the bronchial passageway into the valve member,wherein the valve member is disposed in a valve protector region of the flow control device, which is connected to the retainer region, and wherein, upon release, the retainer region expands to a larger diameter than an expanded diameter of the valve protector region.
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Abstract
Disclosed is a flow control device for a bronchial passageway. The device can includes a valve member that regulates fluid flow through the flow control device, a frame coupled to the valve member, and a membrane attached to the frame. At least a portion of the flow control device forms a seal with the interior wall of the bronchial passageway when the flow control device is implanted in the bronchial passageway. The membrane forms a fluid pathway from the seal into the valve member to direct fluid flowing through the bronchial passageway into the valve member.
226 Citations
12 Claims
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1. A method for modifying air flow in a bronchial passageway of a lung, the method comprising:
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advancing a delivery catheter through a bronchoscope so that a distal end of the delivery catheter and an attached flow control device protrude out of a distal end of the bronchoscope and into the bronchial passageway; releasing the flow control device from the delivery catheter to allow a retainer region of the flow control device, which is at least partially covered with a membrane, to move from a contracted state to an expanded state to form a seal with an interior wall of the bronchial passageway to retain the flow control device in a fixed location therein; and removing the delivery catheter from the bronchial passageway, leaving the flow control device in the passageway to modify air flow therethrough, wherein a valve member disposed in the flow control device permits air flow in an exhalation direction and limits air flow in an inhalation direction, wherein the membrane provides a fluid pathway from the seal to the valve member to direct air flowing through the bronchial passageway into the valve member, wherein the valve member is disposed in a valve protector region of the flow control device, which is connected to the retainer region, and wherein, upon release, the retainer region expands to a larger diameter than an expanded diameter of the valve protector region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for modifying air flow in a segmental bronchus, which feeds into a bronchopulmonary segment of a lung, the method comprising:
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advancing a delivery catheter through a bronchoscope so that a distal end of the delivery catheter and an attached flow control device protrude out of a distal end of the bronchoscope and into the segmental bronchus; releasing the flow control device from the delivery catheter to allow a retainer region of the flow control device, which is at least partially covered with a membrane, to move from a contracted state to an expanded state to form a seal with an interior wall of the segmental bronchus to retain the flow control device in a fixed location therein; and removing the delivery catheter from the segmental bronchus, leaving the flow control device in the segmental bronchus to modify air flow therethrough, wherein a valve member disposed in the flow control device permits air flow in an exhalation direction and limits air flow in an inhalation direction, wherein the membrane provides a fluid pathway from the seal to the valve member to direct air flowing through the segmental bronchus into the valve member, wherein the valve member is disposed in a valve protector region of the flow control device, which is connected to the retainer region, and wherein, upon release, the retainer region expands to a larger diameter than an expanded diameter of the valve protector region. - View Dependent Claims (10, 11, 12)
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Specification