Stent for irrigation and delivery of medication

• US 7,547,323 B2
• Filed: 08/29/2006
• Issued: 06/16/2009
• Est. Priority Date: 08/29/2006
• Status: Active Grant

• Current Assignee: Intersect ENT, Inc. (Medtronic Plc)
• Original Assignee: Sinexus, Inc.
• Inventors: Lavigne, Francois
• Primary Examiner(s): McDermott; Corrine
• Assistant Examiner(s): MILLER, CHERYL L
• Application Number:
  US11/511,876
• Publication Number:
  US 20080097354A1
• Time in Patent Office: 1,022 Days
• Field of Search: 623/10, 623/23.63, 623/23.69, 623/23.7, 623/23.64, 623/23.65, 623/23.66, 604/8, 604/93.01, 604/94.01, 604/19, 604/27, 604/890.1, 604/516
• US Class Current: 623/10
• CPC Class Codes: A61M 25/0041 pre-formed, e.g. specially adapted to fit with the anatomy of body channels urethral catheters A61F2/04
• CPC Class Codes: A61M 25/007 Side holes, e.g. their profiles or arrangements; Provisions to keep side holes unblocked
• CPC Class Codes: A61M 31/00 Devices for introducing or retaining media, e.g. remedies, in cavities of the body A61M25/00 takes precedence ; introducing or retaining ophthalmic products into the ocular cavities A61F9/0008

Abstract

A stent comprises a flexible tube having a proximal end, a distal end, and a passageway extending from said proximal end toward said distal end. A first generally straight tube segment extends from the proximal end while a first generally curved segment extends from an end region of the first generally straight tube segment disposed away from the proximal end of the stent. A second generally straight tube segment extends from an end region of the first curved segment away from the first generally straight tube segment and is arranged at an acute angle relative to the first generally straight tube segment. A second generally curved tube segment extends from one end of the second generally straight tube segment and includes a channel on an exterior surface of the second generally curved tube segment. The first generally curved tube segment and the second generally straight tube segment further include at least one cavity irrigation hole extending from the tube passageway, for providing irrigation fluids into the cavity into which the stent is inserted. At least one segments includes a channel on an exterior surface. The channel is sized to serve as a reservoir to contain a predetermined amount of at least one form of medication for delivery, over a period of time, of the medication to a cavity region proximate which the stent has been inserted.

Claims

1. An irrigation and long term medication delivery stent for a nasal cavity, said stent comprising:

a flexible tube having a proximal end, a distal end, and a passageway extending from said proximal end to said distal end, said flexible tube configured for insertion into a maxillary sinus cavity;

a first generally straight tube segment extending from said proximal end;

a first generally curved segment extending from an end region of said first generally straight tube segment, said end region disposed away from said proximal end of said stent;

a second generally straight tube segment extending from an end region of said first curved segment away from said first generally straight tube segment, said second generally straight tube segment arranged at an acute angle relative to said first generally straight tube segment; and

a second generally curved tube segment extending from one end of said second generally straight tube segment, said second generally curved tube segment including a channel disposed on an exterior surface of said second generally curved tube segment, said channel fluidly coupled to said passageway in said second generally curved tube segment, said channel beginning at a channel starting region on said second generally curved tube segment and terminating at a channel ending region proximate said distal end of said stent, said channel sized to serve as a reservoir to contain a predetermined amount of at least one form of medication for delivery, over a period of time, of said at least one form of medication to a cavity region in which said stent has been inserted.

2. The stent of claim 1, wherein said first generally curved tube segment includes at least one hole extending from said passageway to an exterior surface of said first generally curved tube segment.

3. The stent of claim 2, wherein said second generally straight tube segment includes at least one hole extending from said passageway to an exterior surface of said second generally straight tube segment.

4. The stent of claim 3 wherein said at least one hole in said second generally straight tube segment has a diameter which is larger than a diameter of said at least one hole in said first generally curved tube segment.

5. The stent of claim 1, wherein said second generally curved tube segment is comprised of a plurality of straight and curved tube segments.

6. The stent of claim 5, wherein said second generally curved tube segment includes a second generally curved tube portion, coupled to a third generally straight tube portion, coupled to a third generally curved tube portion, coupled to a fourth generally straight tube portion, coupled to a fourth generally curved tube portion, coupled to a fifth generally straight tube portion, coupled to a fifth generally curved tube portion.

7. An irrigation and long term medication delivery stent for a nasal cavity, said stent comprising:

a flexible tube having a proximal end, a distal end, and a passageway extending from said proximal end to said distal end, said flexible tube configured for insertion into a maxillary sinus cavity;

a first generally straight tube segment extending from said proximal end;

a first generally curved tube segment extending from an end region of said first generally straight tube segment, said end region disposed away from said proximal end of said stent, said first generally curved tube segment including at least one hole extending from said passageway to an exterior surface of said first generally curved tube segment;

a second generally straight tube segment extending from an end region of said first curved segment away from said first generally straight tube segment, said second generally straight tube segment arranged at an acute angle relative to said first generally straight tube segment, said second generally straight tube segment including at least one hole extending from said passageway to an exterior surface of said second generally straight tube segment, said at least one hole in said second generally straight tube segment having a diameter which is larger than a diameter of said at least one hole in said first generally curved tube segment; and

a second generally curved tube segment extending from one end of said second generally straight tube segment, said second generally curved tube segment including a channel disposed on an exterior surface of said second generally curved tube segment, said channel fluidly coupled to said passageway in said second generally curved tube segment, said channel beginning at a channel starting region on said second generally curved tube segment and terminating at a channel ending region proximate said distal end of said stent, said channel sized to serve as a reservoir to contain a predetermined amount of at least one form of medication for delivery, over a period of time, of said at least one form of medication to a cavity region proximate which said stent has been inserted.

8. An irrigation and long term medication delivery stent, configured for insertion into a nasal cavity, said stent comprising:

a flexible tube having a proximal end, a distal end, and a passageway extending from said proximal end to said distal end, said flexible tube configured for insertion into a maxillary sinus cavity region;

a first generally straight tube segment extending from said proximal end;

a first generally curved tube segment extending from an end region of said first generally straight tube segment, said end region disposed away from said proximal end of said stent, said first generally curved tube segment including at least one irrigation hole extending from said passageway to an exterior surface of said first generally curved tube segment;

a second generally straight tube segment extending from an end region of said first curved segment away from said first generally straight tube segment, said second generally straight tube segment arranged at an acute angle relative to said first generally straight tube segment, said second generally straight tube segment including at least one irrigation hole extending from said passageway to an exterior surface of said second generally straight tube segment, said at least one irrigation hole in said second generally straight tube segment having a diameter which is larger than a diameter of said at least one irrigation hole in said first generally curved tube segment; and

a second generally curved tube segment extending from one end of said second generally straight tube segment, said second generally curved tube segment including a channel disposed on an exterior surface of said second generally curved tube segment, said channel fluidly coupled to said passageway in said second generally curved tube segment, said channel beginning at a channel starting region on said second generally curved tube segment and terminating at a channel ending region proximate said distal end of said stent, said channel sized to serve as a reservoir to contain a predetermined amount of at least one form of medication for delivery, over a period of time, of said at least one form of medication to a maxillary sinus cavity region proximate which said stent has been inserted.

9. An irrigation and long term medication delivery stent for a nasal cavity, said stent comprising:

a flexible tube having a proximal end, a distal end, and a passageway extending from said proximal end to said distal end, said flexible tube configured for insertion into a maxillary sinus cavity;

a first generally straight tube segment extending from said proximal end;

a first generally curved tube segment extending from an end region of said first generally straight tube segment, said end region disposed away from said proximal end of said stent, said first generally curved tube segment including at least one hole extending tram said passageway to an exterior surface of said first generally curved tube segment;

a second generally straight tube segment extending from an end region of said first curved segment away from said first generally straight tube segment, said second generally straight tube segment arranged at an acute angle relative to said first generally straight tube segment, said second generally straight tube segment including at least one hole extending from said passageway to an exterior surface of said second generally straight tube segment; and

a second generally curved tube segment extending from one end of said second generally straight tube segment, said second generally curved tube segment including a channel disposed on an exterior surface of said second generally curved tube segment, said channel fluidly coupled to said passageway in said second generally curved tube segment, said channel beginning at a channel starting region on said second generally curved tube segment and terminating at a channel ending region proximate said distal end of said stent, said channel sized to serve as a reservoir to contain a predetermined amount of at least one form of medication for delivery, over a period of time, of said at least one form of medication to a cavity region proximate which said stent has been inserted, and wherein said second generally curved tube segment comprises a second generally curved tube portion, coupled to a third generally straight tube portion, coupled to a third generally curved tube portion, coupled to a fourth generally straight tube portion, coupled to a fourth generally curved tube portion, coupled to a fifth generally straight tube portion, coupled to a fifth generally curved tube portion.