Devices for creating collateral channels

• US 6,712,812 B2
• Filed: 09/04/2001
• Issued: 03/30/2004
• Est. Priority Date: 08/05/1999
• Status: Expired due to Term

• Current Assignee: Broncus Medical Incorporated
• Original Assignee: Broncus Technologies, Inc
• Inventors: Keast, Thomas, Roschak, Ed, Tanaka, Don, Haugaard, Dave
• Primary Examiner(s): PEFFLEY, MICHAEL F
• Application Number:
  US09/947,126
• Publication Number:
  US 20020087153A1
• Time in Patent Office: 938 Days
• Field of Search: 606/41, 606/45, 606/46, 606/48-50
• US Class Current: 606/41
• CPC Class Codes: A61B 17/064 Surgical staples, i.e. penetrating the tissue
• CPC Class Codes: A61B 17/0644 penetrating the tissue, deformable to closed position
• CPC Class Codes: A61B 17/08 Wound clamps or clips, i.e. not or only partly penetrating the tissue suture bridges A61B17/0466; Devices for bringing together the edges of a wound
• CPC Class Codes: A61B 17/11 for performing anastomosis; Buttons for anastomosis
• CPC Class Codes: A61B 17/22 Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for dilators A61M29/00
• CPC Class Codes: A61B 18/1477 Needle-like probes
• CPC Class Codes: A61B 18/148 having a short, rigid shaft for accessing the inner body transcutaneously, e.g. for neurosurgery or arthroscopy
• CPC Class Codes: A61B 18/1485 having a short rigid shaft for accessing the inner body through natural openings
• CPC Class Codes: A61B 18/1492 having a flexible, catheter-like structure, e.g. for heart ablation A61B18/1477 takes precedence
• CPC Class Codes: A61B 18/1815 using microwaves
• CPC Class Codes: A61B 2017/00106 ultrasonic
• CPC Class Codes: A61B 2017/00252 for by-pass connections, i.e. connections from heart chamber to blood vessel or from blood vessel to blood vessel
• CPC Class Codes: A61B 2017/00575 for closure at remote site, e.g. closing atrial septum defects
• CPC Class Codes: A61B 2017/00809 Lung operations
• CPC Class Codes: A61B 2017/1135 End-to-side connections, e.g. T- or Y-connections
• CPC Class Codes: A61B 2017/1139 Side-to-side connections, e.g. shunt or X-connections
• CPC Class Codes: A61B 2017/22067 Blocking; Occlusion A61B2017/22054 takes precedence
• CPC Class Codes: A61B 2017/22077 with a part piercing the tissue A61B2017/22044 takes precedence
• CPC Class Codes: A61B 2018/00005 Cooling or heating of the probe or tissue immediately surrounding the probe
• CPC Class Codes: A61B 2018/00029 open
• CPC Class Codes: A61B 2018/00214 : Expandable means emitting energy, e.g. by elements carried thereon
• CPC Class Codes: A61B 2018/00273 : Anchoring means for temporary attachment of a device to tissue
• CPC Class Codes: A61B 2018/00285 : Balloons
• CPC Class Codes: A61B 2018/00541 : Lung or bronchi
• CPC Class Codes: A61B 2018/00898 : Alarms or notifications created in response to an abnormal condition
• CPC Class Codes: A61B 2018/1425 : Needle
• CPC Class Codes: A61B 2018/1437 : whereby the windings of the spiral touch each other such as to create a continuous surface
• CPC Class Codes: A61B 2018/1475 : Electrodes retractable in or deployable from a housing
• CPC Class Codes: A61B 2090/08021 : of the patient or his organs
• CPC Class Codes: A61B 2090/3782 : transmitter or receiver in catheter or minimal invasive instrument
• CPC Class Codes: A61B 2090/395 : with marking agent for marking skin or other tissue
• CPC Class Codes: A61B 5/489 : Blood vessels
• CPC Class Codes: A61B 8/06 : Measuring blood flow measuring volume flow in general G01F, e.g. G01F1/66, G01F1/72; measuring speed of fluids in general G01P5/00
• CPC Class Codes: A61B 8/12 : in body cavities or body tracts, e.g. by using catheters catheters per se A61M25/00
• CPC Class Codes: A61B 8/445 : Details of catheter construction
• CPC Class Codes: A61B 90/36 : Image-producing devices or illumination devices not otherwise provided for
• CPC Class Codes: A61F 2/02 : Prostheses implantable into the body closure means for urethra or rectum or for artificial body openings therefor A61F2/0004
• CPC Class Codes: A61F 2/07 : Stent-grafts
• CPC Class Codes: A61F 2/20 : Epiglottis; Larynxes; Tracheae combined with larynxes or for use therewith tracheae, bronchi per se A61F2/04 ; tracheostomy tubes A61M16/0465
• CPC Class Codes: A61F 2/2412 : with soft flexible valve members, e.g. tissue valves shaped like natural valves check valves with flexible valve members in general F16K15/14
• CPC Class Codes: A61F 2/2418 : Scaffolds therefor, e.g. support stents
• CPC Class Codes: A61F 2/90 : characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2/91 : made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
• CPC Class Codes: A61F 2/92 : Stents in the form of a rolled-up sheet expanding after insertion into the vessel , e.g. with a spiral shape in cross-section
• CPC Class Codes: A61F 2002/043 : Bronchi
• CPC Class Codes: A61F 2002/061 : provided with means for allowing access to secondary lumens
• CPC Class Codes: A61F 2002/072 : Encapsulated stents, e.g. wire or whole stent embedded in lining
• CPC Class Codes: A61F 2002/8483 : Barbs
• CPC Class Codes: A61F 2220/0008 : Fixation appliances for connecting prostheses to the body
• CPC Class Codes: A61F 2220/005 : using adhesives
• CPC Class Codes: A61F 2220/0075 : sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable
• CPC Class Codes: A61F 2230/005 : Rosette-shaped, e.g. star-shaped
• CPC Class Codes: A61F 2230/0054 : V-shaped
• CPC Class Codes: A61F 2230/0058 : X-shaped
• CPC Class Codes: A61F 2230/0067 : conical
• CPC Class Codes: A61F 2230/0076 : ellipsoidal or ovoid
• CPC Class Codes: A61F 2230/0078 : hyperboloidal
• CPC Class Codes: A61N 2007/0078 : with multiple treatment transducers

Abstract

The devices disclosed herein are directed to altering gaseous flow within a lung to improve the expiration cycle of, for instance, an individual having Chronic Obstructive Pulmonary Disease. More particularly, these devices produce collateral openings or channels through the airway wall so that oxygen depleted/carbon dioxide rich air is able to pass directly out of the lung tissue to facilitate both the exchange of oxygen ultimately into the blood and/or to decompress hyper-inflated lungs.

Claims

1. A medical device for creating collateral channels in lung tissue comprising:

an elongate body having a proximal end and a distal end, and a lumen extending therethrough, the elongate body having a shoulder being radially adjustable relative to said elongate body and has a reduced profile and an expanded profile;

a heating element adapted to use heat to create holes in the tissue and extending distally from said distal end, and having a heating surface located over a front surface of said heating element said heating surface adapted to minimize heat in a radial direction from said heating element, wherein said heating element is moveable within at least a portion of said lumen of said elongate body;

where the shoulder is located proximate to said heating element and has a diameter greater than a diameter of said heating element to limit the depth of penetration of said heating element within the tissue, said shoulder comprises a front end of said elongate body when said heating element is extended from said lumen and in said expanded profile said shoulder diameter is greater than said diameter of said heating element; and

an insulating surface located adjacent to said heating surface and which prevents heating of tissue adjacent to said insulating surface.

2. The medical device of claim 1, wherein said insulating surface comprises a ceramic material.

3. The medical device of claim 1, wherein said heating surface comprises a metallic material.

4. The medical device of claim 1, wherein said insulating surface comprises a sleeve placed about said heating element.

5. The medical device of claim 1, wherein said insulating surface comprises a ceramic placed about said heating element.

6. The medical device of claim 1, further comprising an energy source coupled to said heating element.

7. The medical device of claim 6, wherein said energy source comprises a RF energy source and wherein said heating element comprises at least one RF electrode.

8. The medical device of claim 1, wherein said shoulder comprises a balloon.

9. The medical device of claim 1, wherein said shoulder comprises a portion of said elongate member having a plurality of hinged members parallel to said lumen wherein each expandable member includes a living hinge allowing for said hinged members to move between said expanded profile and said reduced profile as said elongate member is axially moved relative to said heating element.

10. The medical device of claim 1, wherein said heating surface has a depth less than a diameter of said heating surface.

11. The medical device of claim 10, wherein said heating surface depth is less than half of said heating surface diameter.

12. A medical device for creating collateral channels in lung tissue comprising:

an elongate body having a proximal end and a distal end, and a lumen extending therethrough, the elongate body having a shoulder;

a heating element adapted to use heat to create holes in the tissue and extending distally from said distal end, and having a heating surface located over a front surface of said heating element said heating surface adapted to minimize heat in a radial direction from said heating element, wherein said heating element is moveable within at least a portion of said lumen of said elongate body;

where the shoulder is located proximate to said heating element and has a diameter greater than a diameter of said heating element to limit the depth of penetration of said heating element within the tissue where said shoulder comprises a front end of said elongate body when said heating element is extended from said lumen;

an insulating surface located adjacent to said heating surface and which prevents heating of tissue adjacent to said insulating surface; and

wherein a portion of said lumen at said front end of said elongate body has a reduced diameter being smaller than a diameter of said heating element, and wherein at least said distal end of said elongate body is radially adjustable to permit said heating element to move in and out of said lumen of said elongate body.

13. A medical device for creating collateral channels in lung tissue comprising:

an elongate body having a proximal end and a distal end, and a lumen extending therethrough;

a heating element adapted to use heat to create holes in the tissue and extending distally from said distal end, and having a heating surface located over a front surface of said heating element said heating surface adapted to minimize heat in a radial direction from said heating element; and

a shoulder located on said elongate body proximate to said heating element, wherein said shoulder has a diameter greater than a diameter of said heating element to limit the depth of penetration of said heating element within the tissue, wherein said shoulder is radially adjustable relative to said elongate body and has a reduced profile and an expanded profile, wherein in said expanded profile said diameter of said shoulder is greater than said diameter of said heating element.

14. The medical device of claim 13, wherein said shoulder comprises a balloon.

15. The medical device of claim 13, wherein said shoulder comprises a portion of said elongate member having a plurality of hinged members parallel to said lumen wherein each expandable member includes a living hinge allowing for said hinged members to move between said expanded profile and said reduced profile as said elongate member is axially moved relative to said heating element.

16. The medical device of claim 13, further comprising an energy source coupled to said heating element.

17. The medical device of claim 16, wherein said energy source comprises a RF energy source and wherein said heating element comprises at least one RF electrode.

18. The medical device of claim 13, wherein said heating surface has a depth less than a diameter of said heating surface.

19. The medical device of claim 18, wherein said heating surface depth is less than half of said heating surface diameter.

20. A medical device for creating collateral channels in lung tissue comprising:

an elongate body having a proximal end and a distal end, and a lumen extending therethrough;

a heating element adapted to use heat to create holes in the tissue and extending distally from said distal end, and having a heating surface located over a front surface of said heating element said heating surface adapted to minimize heat in a radial direction from said heating element, said heating element is moveable within at least a portion of said lumen of said elongate body, and

a shoulder located on said elongate body proximate to said heating element, wherein said shoulder has a diameter greater than a diameter of said heating element to limit the depth of penetration of said heating element within the tissue and where said shoulder comprises a front end of said elongate body when said heating element is extended from said lumen; and

wherein a portion of said lumen at said front end of said elongate body has a reduced diameter being smaller than a diameter of said heating element, and wherein at least said distal end of said elongate body is radially adjustable to permit said heating element to move in and out of said lumen of said elongate body.