Methods and apparatus for treatment of a body cavity or lumen
First Claim
1. A system for treating a condition in a body lumen, comprising:
- a first catheter having a first retaining member and a second catheter having a second retaining member, wherein the first and second retaining members are configured for positioning within the body lumen and wherein a position of the first and second retaining members are adjustable relative to one another so as to define a treatment area between the retaining members;
a cryoablative agent in fluid communication with the treatment area; and
a controller in communication with the first and second retaining members and configured to monitor a first pressure of the cryoablative agent within the treatment area for comparison against a second pressure within the first and second retaining members, wherein the controller is further configured to adjust the first pressure to be below the second pressure such that the first pressure is maintained below the second pressure.
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Accused Products
Abstract
Methods and apparatus for the treatment of a body cavity or lumen are described where a heated fluid and/or gas may be introduced through a catheter and into treatment area within the body contained between one or more inflatable/expandable members. The catheter may also have optional pressure sensing elements which may allow for control of the pressure within the treatment zone and also prevent the pressure from exceeding a pressure of the inflatable/expandable members to thereby contain the treatment area between these inflatable/expandable members. Optionally, a chilled or room temperature fluid such as water may then be used to rapidly terminate the treatment session.
80 Citations
18 Claims
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1. A system for treating a condition in a body lumen, comprising:
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a first catheter having a first retaining member and a second catheter having a second retaining member, wherein the first and second retaining members are configured for positioning within the body lumen and wherein a position of the first and second retaining members are adjustable relative to one another so as to define a treatment area between the retaining members; a cryoablative agent in fluid communication with the treatment area; and a controller in communication with the first and second retaining members and configured to monitor a first pressure of the cryoablative agent within the treatment area for comparison against a second pressure within the first and second retaining members, wherein the controller is further configured to adjust the first pressure to be below the second pressure such that the first pressure is maintained below the second pressure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for treating a body lumen, comprising:
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positioning a first catheter having a first retaining member relative to a second catheter having a second retaining member within the body lumen so as to define a treatment area between the first and second retaining members; introducing a cryoablative agent into the treatment area such that a tissue region within the treatment area is thermally ablated; monitoring a first pressure of the cryoablative agent introduced into the treatment area via a controller; monitoring a second pressure within the first or second retaining members via the controller; comparing the first pressure against the second pressure via the controller; and if the first pressure exceeds the second pressure, adjusting the first pressure to be below the second pressure. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification