Devices for maintaining patency of surgically created channels in tissue
First Claim
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1. A hole-making catheter for creating and dilating an opening within tissue, the catheter comprising:
- an elongate shaft having a proximal portion and a distal portion, and at least one lumen extending through the proximal end, said shaft having a flexibility and diameter to slidably fit within a working channel of a bronchoscope;
a nondistensible balloon having an interior in fluid communication with the lumen, the nondistensible balloon located on the distal portion of the elongate shaft;
a piercing member located at the distal portion of the elongate shaft;
the piercing member being extendable and retractable within the elongate shaft; and
a depth limiting feature wherein the depth limiting feature cooperates with the elongate shaft to halt distal movement of the distal portion of the elongate shaft beyond a fixed distance.
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Accused Products
Abstract
Devices and methods for altering gaseous flow within a lung to improve the expiration cycle of an individual, particularly individuals having chronic obstructive pulmonary disease. The methods and devices create channels in lung tissue and maintain the patency of these surgically created channels in tissue. Maintaining the patency of the channels allows air to pass directly out of the lung tissue which facilitates the exchange of oxygen ultimately into the blood and/or decompresses hyper-inflated lungs.
653 Citations
20 Claims
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1. A hole-making catheter for creating and dilating an opening within tissue, the catheter comprising:
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an elongate shaft having a proximal portion and a distal portion, and at least one lumen extending through the proximal end, said shaft having a flexibility and diameter to slidably fit within a working channel of a bronchoscope; a nondistensible balloon having an interior in fluid communication with the lumen, the nondistensible balloon located on the distal portion of the elongate shaft; a piercing member located at the distal portion of the elongate shaft;
the piercing member being extendable and retractable within the elongate shaft; anda depth limiting feature wherein the depth limiting feature cooperates with the elongate shaft to halt distal movement of the distal portion of the elongate shaft beyond a fixed distance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for treating a lung, the method comprising:
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inserting a bronchoscope into an airway of the lung; selecting a site along the airway to create a hole; advancing a hole-making catheter through a working channel of the bronchoscope and to the site, the hole-making catheter comprising a nondistensible balloon and a depth limiting member adjacent to the nondistensible balloon; creating a hole in the airway wall by piercing the airway wall at the site; advancing the nondistensible balloon into the hole until a depth limiting member contacts a tissue wall to prevent further advancement of the hole-making catheter which limits a penetration depth of the nondistensible balloon into the tissue; enlarging the hole by expanding the nondistensible balloon; and advancing a tubular member through the hole. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A system for treating a lung, the system comprising:
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a bronchoscope having, a working channel; a hole-making catheter slidably disposed within the working channel of the bronchoscope, said hole-making catheter comprising;
an elongate shaft having a proximal portion and a distal portion, and at least one lumen extending through the proximal end;
a nondistensible balloon having an interior in fluid communication with the lumen, the nondistensible balloon located on the distal portion of the elongate shaft;a piercing member located at the distal portion of the elongate shaft;
the piercing member being extendable and retractable within the elongate shaft;a depth limiting feature adapted to limit movement of the hole-making catheter a fixed distance through a tissue wall; and an obturator insertable within the hole-making catheter.
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Specification