Methods and apparatus for treatment of a body cavity or lumen

• US 10,004,551 B2
• Filed: 08/19/2016
• Issued: 06/26/2018
• Est. Priority Date: 06/01/2009
• Status: Active Grant

• Current Assignee: Channel Medsystems, Inc.
• Original Assignee: Channel Medsystems, Inc.
• Inventors: Burnett, Daniel R.
• Primary Examiner(s): Flory, Christopher A
• Application Number:
  US15/242,309
• Publication Number:
  US 20160354139A1
• Time in Patent Office: 676 Days
• Field of Search: 606 21, 606 27, 607 96, 607105
• CPC Class Codes: A61B 18/02 by cooling, e.g. cryogenic techniques devices for cooling specific reflex points of the body within cell-life limits A61H39/06
• CPC Class Codes: A61B 18/04 by heating by applying electromagnetic radiation A61B18/18; hyperthermia using electric or magnetic fields, radiation or ultrasound A61N
• CPC Class Codes: A61B 2018/00023 closed, i.e. without wound contact by the fluid
• CPC Class Codes: A61B 2018/046 in liquid form
• CPC Class Codes: A61B 2090/064 for measuring force, pressure or mechanical tension
• CPC Class Codes: A61M 2025/0002 with a pressure sensor at the distal end
• CPC Class Codes: A61M 2025/0003 having an additional lumen transmitting fluid pressure to the outside for measurement
• CPC Class Codes: A61M 2025/0175 having telescopic features, interengaging nestable members movable in relations to one another
• CPC Class Codes: A61M 2025/1015 having two or more independently movable balloons where the distance between the balloons can be adjusted, e.g. two balloon catheters concentric to each other forming an adjustable multiple balloon catheter system
• CPC Class Codes: A61M 2025/1052 for temporarily occluding a vessel for isolating a sector
• CPC Class Codes: A61M 2210/105 Oesophagus
• CPC Class Codes: A61M 2210/1433 Uterus
• CPC Class Codes: A61M 25/10 Balloon catheters A61M25/0125 takes precedence; embolectomy A61B17/22032; retractors A61B17/02; inflatable balloons for placing stents or stent-grafts A61F2/958 ; stomach balloons for treatment of obesity A61F5/0003; oesophagal tubes A61J15/00

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.

Claims

1. A method for treating a body cavity or lumen, comprising:

forming a treatment area for treating a tissue region of interest by defining the treatment area with one or more inflatable members;

adjusting a size of the treatment area by translating a first catheter relative to a second catheter;

introducing a cryoablative agent into the treatment area such that the tissue region is treated to a controlled depth by thermal ablation with the cryoablative agent;

monitoring a first pressure of the cryoablative agent introduced into the treatment area;

comparing the first pressure against a second pressure within the one or more inflatable members; and

adjusting the first pressure to be below the second pressure if the first pressure exceeds the second pressure.

2. The method of claim 1 wherein forming a treatment area comprises forming the treatment area within a body lumen selected from the group consisting of an esophagus, uterus, respiratory tract, and bladder.

3. The method of claim 1 wherein forming a treatment area comprises inflating the one or more inflatable members via a fluid.

4. The method of claim 1 wherein adjusting a size comprises translating the first catheter so that a lesion is contained within the treatment area.

5. The method of claim 1 wherein introducing a cryoablative agent comprises heating or cooling the cryoablative agent prior to introducing into the treatment area.

6. The method of claim 1 further comprising visualizing via an endoscope while forming a treatment area.

7. The method of claim 1 wherein a temperature of the cryoablative agent is less than −

5 degrees C.

8. The method of claim 1 further comprising introducing an additional fluid into the treatment area having a temperature which warms the treatment area.

9. The method of claim 1 further comprising introducing an agent having an active compound within the treatment area.