Method of manipulating matter in a mammalian body
The invention provides a method of using an apparatus for manipulating matter in a confined or inaccessible space, comprising providing an apparatus having manipulator means at least partly constructed of one or more bent or twisted elongate shape memory alloy members having pseudoelasticity at the intended manipulation temperature, and a hollow housing or cannula capable of holding at least the shape memory alloy member(s) in a relatively straightened state, and actuating means for extending the shape memory alloy member(s) from the housing to manipulate matter within the space and for withdrawing the shape memory alloy member(s) into the housing, the arrangement being such that the shape-memory alloy member(s) bend(s) or twist(s) pseudoelastically in a lateral or helical sense to manipulate the matter on extending from the housing at the manipulation temperature, and become(s) relatively straightened on withdrawal into the housing at the temperature.
1. A surgical device comprising:
a housing having:
an actuator end;
a deployment end; and
a bore extending between the actuator end and the deployment end;
a barrier member comprising:
an elastically deformable curved element comprising a shape memory alloy; and
a barrier coupled to the curved element;
a connector coupled to the barrier member and extending through the bore; and
an actuator coupled to the connector, the actuator being positioned outside of the actuator end;
wherein the barrier member is reversibly moveable by the actuator through the deployment end between a first position inside of the bore where the curved element is compressed and a second position outside of the bore where the curved element is expanded.
2. The surgical device of claim 1 further comprising a seal between the housing and the connector.
3. The surgical device of claim 1 wherein the housing has an inner diameter of from about 0.25 cm to about 2.5 cm.
4. The surgical device of claim 1 wherein the housing has an inner diameter of from about 0.3 cm to about 2 cm.
5. The surgical device of claim 1 wherein the housing has an outer diameter of from about 0.4 cm to about 3 cm.
6. The surgical device of claim 1 wherein the housing has an inner diameter of from about 0.4 cm to about 1.5 cm.
7. The surgical device of claim 1 wherein the curved element is a loop.
8. The surgical device of claim 7 wherein the loop has a diameter of from about 1 cm to about 5 cm.
9. The surgical device of claim 8 wherein the barrier has a depth of from about 1 to about 7 cm.
10. The surgical device of claim 1 wherein the barrier is permeable to human body fluids.
11. The surgical device of claim 10 wherein the barrier comprises at least one of the group consisting of a net, a web, and a grid.
12. The surgical device of claim 11 wherein the barrier further comprises at least one of the group consisting of polyethylene, polyvinyl chloride, urethane, and silicone rubber.
13. The surgical device of claim 1 wherein the curved element is at least one of a wire and a strip of elastic material.
14. The surgical device of claim 1 further comprising a means to prevent rotation of the baffler member relative to the housing.
15. The surgical device of claim 1 wherein the actuator comprises a syringe plunger mechanism.
16. The surgical device of claim 1 wherein the actuator comprises a thumb actuated mechanism.
17. A method for capturing objects in a mammalian body comprising:
positioning a device according to claim 16 in the space in the mammalian body;
pushing the actuator to move the barrier member from the first position to the second position;
manipulating the matter using the baffler material;
pulling the actuator to move the barrier member from the second position to the first position; and
removing the device from the body.
18. A method for manipulating matter in a space in a mammalian body comprising:
positioning a device according to claim 1 in the space in the mammalian body;
engaging the actuator to move the barrier member from the first position to the second position; and
manipulating the matter using the barrier material.
19. The method of claim 18 further comprising:
moving the actuator to move the baffler member from the second position to the first position; and
removing the device from the body.
20. The surgical device of claim 1 further comprising a cautery wire coupled to the actuator and extending through the bore, the cautery wire being reversibly moveable by the actuator through the deployment end between a first position inside of the bore and a second position outside of the bore.