System and method for increasing a cross-sectional area of a body lumen
Devices and methods are disclosed for managing and/or treating body tissues obstructing a hollow body lumen, such as the prostatic lobe tissues obstructing the urethra. A scaffolding may be provided with opposing tissue-engaging portions and at least one expansion member configured to transition between a compressed configuration having a reduced distance between the tissue-engaging portions and a deployed configuration having an increased distance between the tissue-engaging portions.
1. A device for increasing a cross-sectional area of a body lumen, comprising a scaffolding with opposing first and second opposing tissue-engaging portions and at least one expansion member having a thickness, the scaffolding being configured to transition between a compressed configuration having a reduced distance between the first and second tissue-engaging portions and a deployed configuration having an increased distance between the first and second tissue-engaging portions, the first and second tissue-engaging portions having an increased surface area relative to the thickness of the expansion member, the first tissue-engaging portion being secured to a shaft at a first end of the shaft slidably secured within a housing, the shaft being positioned coaxially within the housing and having a driving element secured to a second end of the shaft for biasing the shaft outwards from the housing.
2. The device of claim 1 , wherein each of the first and second tissue-engaging portions comprise a lateral plate.
3. The device of claim 2 , wherein each of the first and second tissue-engaging portions further comprise an anchor.
4. The device of claim 1 , wherein the at least one expansion member is telescoping.
5. The device of claim 1 , wherein the at least one expansion member is a bi-directional expansion member and wherein the tissue-engaging portions are secured to opposing ends of the bi-directional expansion member.
6. The device of claim 1 , wherein a pair of uni-directional expansion members are coupled in opposing directions and wherein each tissue-engaging portion is secured to one end of each uni-directional expansion member.
7. The device of claim 6 , wherein the pair of uni-directional expansion members are coupled by a pivot, wherein the pivot is biased to align the uni-directional expansion members longitudinally but allows the uni-directional expansion members to deflect with respect to each other.
8. The device of claim 7 , further comprising a tether secured to the pivot.
9. The device of claim 1 , wherein at least a portion of the scaffolding is coated with an agent.
10. The device of claim 9 , wherein the agent comprises an anti-encrustation agent.
11. The device of claim 1 , further comprising an agent disposed within at least one reservoir formed in the scaffolding.