DEFLATABLE RETENTION CATHETER

• US 3,742,960 A
• Filed: 10/07/1971
• Issued: 07/03/1973
• Est. Priority Date: 10/07/1971
• Status: Expired due to Term

• Current Assignee: John F. Dye, William J. Binard
• Original Assignee: John F. Dye, William J. Binard
• Inventors: Dye, John F., Binard, William J.
• Primary Examiner(s): Medbery, Aldrich F.
• Application Number:
  US05/187,371
• Time in Patent Office: 635 Days
• Field of Search: 128/348,246,349,351,350,349BV
• US Class Current: 604/99.03
• CPC Class Codes: A61M 2025/1077 having a system for expelling the air out of the balloon before inflation and use
• 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

An improved safety-deflating retention catheter wherein the balloon empties directly into the drainage lumen through a short passageway under the retention balloon. Temporary blocking means are positioned within or over the passageway, the blocking means being overridden due to the flexible nature of the distal end when that end is stretched by a force which might otherwise pull the balloon into the urethra in its inflated state.

Claims

1. In a drainage device having a proximal end and an open distal end for insertion into an animal body cavity, a main lumen connecting said distal and proximal ends for draining the cavity, inflatable retaining means overlying a portion of the wall of said device adjacent said distal end for retaining said device within the cavity when inflated, and means for releasing the contents of said retaining means so as to deflate the same;

the improvement comprising said releasing means including a release passageway adjacent the retaining means and extending from said retaining means to said main lumen, means for blocking said passageway, and means for overriding said blocking means, said overriding means being activated upon longitudinal tensioning of said device responsive to attempted withdrawal of the retaining means, while in its inflated state, from the cavity.

2. The improved device as defined in claim 1, wherein said overriding means is arrestable so as to be effective to release further contents of said retaining means to said main lumen whenever such tensioning is repeatedly applied to said device.

3. The improved device as defined in claim 1, wherein said passageway is relatively short in length compared to said lumen, whereby access time from said retaining means to said lumen is minimized.

4. The improved device as defined in claim 3, wherein no part of said passageway extends longitudinally beyond that portion of said device which mounts said retaining means.

5. The improved device as defined in claim 4, wherein said passageway extends only generally perpendicularly to said lumen.

6. The improved device as defined in claim 1, wherein at least a portion of said passageway is positioned approximately within the proximal half of said wall portion under said retaining means, whereby said overriding means are promptly effective during tensioning to release said retaining means.

7. The improved device as defined in claim 1, wherein said blocking means includes a valve operatively positioned between said passageway and said retaining means, said valve closing off flow from said retaining means to said passageway and wherein said overriding means includes Means for altering the shape of said passageway so as to extend the same beyond the effective closing region of said valve.

8. The improved device as defined in claim 8, wherein said valve is a flap valve attached externally to said device operatively between said retaining means and said device, said attachment being longitudinally displaced from said passageway, said valve loosely covering said passageway, and wherein said altering means includes longitudinally flexible walls defining said lumen and said passageway, whereby longitudinal stretching of said walls causes said passageway and said flap valve to longitudinally displace with respect to each other so as to remove said flap valve from its covering relationship to said passageway.

9. The improved device as defined in claim 8 wherein said attachment of said flap valve is distal to said passageway.

10. The improved device as defined in claim 8 wherein said attachment is proximal to said passageway.

11. The improved device as defined in claim 8, wherein said walls at least in part are formed from an elastomeric material having a breaking elongation quality commensurate to that of latex rubber.

12. The improved device as defined in claim 8, wherein said walls defining said lumen include embedded within a portion thereof in the vicinity of said passageway, an inelastic deformable element oriented so as to permanently deform in the presence of said longitudinal stretching.

13. The improved device as defined in claim 12, wherein said element is a coiled inelastic wire.

14. The improved device as defined in claim 7, wherein said effective closing region and said altering means are positioned under said retaining means adjacent to the proximal portion thereof, whereby said overriding means are promptly effective under said tensioning to release said retaining means.

15. The improved device as defined in claim 1, wherein said blocking means includes a plug seated within said passageway, said plug being relatively inflexible, and wherein said overriding means includes relatively flexible walls defining said passageway and said lumen, whereby longitudinal stretching of said device causes said passageway to enlarge in amount sufficient to unseat said plug.

16. The improved device as defined in claim 1, wherein said passageway and said blocking means are defined by at least one grooved slot in a portion of the walls of said device, extending generally parallel to said lumen, and by a mating tongue portion of walls which opposes and extends into said slot.

17. The improved device as defined in claim 16, wherein said mating portion and said slot mate along a direction which is longitudinal to said lumen, and wherein said portions of said walls are flexible, whereby longitudinal stretching of said walls causes said mating portion and said slot to separate, releasing said retaining means.