Endoscopic retractor instrument and associated method
An endoscopic retractor is an elongate balloon having an expanded configuration having two end portions and a plurality of struts or spacer members extending between the end portions. The retractor balloon is a single tubular preform bent during manufacture to form the expanded configuration. Thus, the struts or spacer members are integral with both end portions and define therewith a single flow path for inflation or pressurization fluid.
1. An endoscopic retractor instrument comprising a balloon having an inflated or expanded configuration with longitudinally spaced end portions in the form of spiraling tubular coils, said coils being connected to one another by a plurality of mutually transversely spaced elongate spacer tubes, said coils and said spacer tubes being formed from a single bent and wound elongate tubular preform.
2. The retractor instrument defined in claim 1 wherein said tubular coils each have between 1 and 2 windings.
3. The retractor instrument defined in claim 2 wherein tubular coils each have approximately one-and-a-half windings.
4. The retractor instrument defined in claim 1 wherein balloon defines a single pathway for movement of an inflation fluid to inflate said balloon, said single pathway including both of said coils and all of said spacer tubes.
5. The retractor instrument defined in claim 4 wherein said single pathway follows, in sequence, a first one of said spacer tubes, a first one of said coils, a second one of said spacer tubes, a second one of said coils, and a third one of said spacer tubes.
6. The retractor instrument defined in claim 5 wherein said third one of said spacer tubes is connected to said second one of said coils by adhesive.
7. The retractor instrument defined in claim 1 wherein said balloon includes means for deploying said balloon from a distal end of an endoscope.
8. The retractor instrument defined in claim 7 wherein said balloon is insertable in a deflated configuration inside a working channel of the endoscope.
9. The retractor instrument defined in claim 1 wherein said balloon has a single smooth and continuous wall free of seams.
10. An endoscopic retractor comprising a single elongate tubular balloon having an inflated or expanded configuration that is partially spirally coiled to form a cage, said balloon having a single smooth and continuous wall free of seams, said inflated or expanded configuration including a pair of longitudinally spaced coils at opposite ends, said coils being coupled to one another by a plurality of elongate transversely spaced spacer tubes.
11. The retractor defined in claim 10 wherein balloon defines a single pathway for movement of an inflation fluid to inflate said balloon, said single pathway including both of said coils and all of said spacer tubes.
12. The retractor instrument defined in claim 11 wherein said single pathway follows, in sequence, a first one of said spacer tubes, a first one of said coils, a second one of said spacer tubes, a second one of said coils, and a third one of said spacer tubes.
13. The retractor instrument defined in claim 12 wherein said third one of said spacer tubes is connected to said second one of said coils by adhesive.
14. The retractor instrument defined in claim 10 wherein said tubular coils each have between 1 and 2 windings.
15. The retractor instrument defined in claim 10 wherein tubular coils each have approximately one-and-a-half windings.
16. A medical instrument comprising:
a retractor in the form of a balloon having an inflated or expanded configuration with longitudinal spaced end portions in the form of spiraling tubular coils, said coils being connected to one another by a plurality of mutually transversely spaced elongate spacer tubes, said coils and said spacer tubes being formed from a single bent and wound elongate tubular preform; and
means for using said retractor in conjunction with a flexible endoscopic instrument so that an expanded configuration of said retractor retracts tissues located ahead of a distal tip of said endoscopic instrument to facilitate visualization.
17. The retractor instrument defined in claim 16 wherein said tubular coils each have between 1 and 2 windings.
18. The retractor instrument defined in claim 16 wherein balloon defines a single pathway for movement of an inflation fluid to inflate said balloon, said single pathway including both of said coils and all of said spacer tubes.
19. The instrument defined in claim 16 wherein said means for using includes means for attaching said retractor at least indirectly to said endoscopic instrument.