Controlled detachment of intra-luminal medical device
First Claim
1. A medical device comprising:
- a device housing sized for introduction into and residence completely within the body lumen;
a fixation mechanism to attach the device housing to a surface within the body lumen, wherein the fixation mechanism includes a cavity formed in the device housing and a shaft to capture luminal tissue within the cavity and a spring to bias the shaft toward the tissue;
a controlled detachment mechanism mechanically actuating the fixation mechanism to selectively detach the device housing from the surface of the body lumen without endoscopic intervention, wherein the detachment mechanism includes a solenoid coil wound about the shaft and a circuit to energize the solenoid coil to drive the shaft against the spring bias and thereby release the luminal tissue; and
a controller responsive to a control signal, wherein the controller activates the controlled detachment mechanism, and wherein the medical device remains completely within the body lumen until after the device is detached from the surface.
2 Assignments
0 Petitions
Accused Products
Abstract
An intra-luminal medical device includes a fixation mechanism to attach the medical device to tissue within a body lumen, and a detachment mechanism to permit selective detachment of the medical device from the tissue attachment site without the need for endoscopic or surgical intervention. An electromagnetic device may be provided to mechanically actuate the detachment mechanism. Alternatively, a fuse link may be electrically blown to detach the medical device. As a further alternative, a rapidly degradable bonding agent may be exposed to a degradation agent to detach the medical device from a bonding surface within the body lumen. The medical device may eliminate problems associated with uncertain and inconsistent detachment of intra-luminal medical devices.
43 Citations
24 Claims
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1. A medical device comprising:
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a device housing sized for introduction into and residence completely within the body lumen; a fixation mechanism to attach the device housing to a surface within the body lumen, wherein the fixation mechanism includes a cavity formed in the device housing and a shaft to capture luminal tissue within the cavity and a spring to bias the shaft toward the tissue; a controlled detachment mechanism mechanically actuating the fixation mechanism to selectively detach the device housing from the surface of the body lumen without endoscopic intervention, wherein the detachment mechanism includes a solenoid coil wound about the shaft and a circuit to energize the solenoid coil to drive the shaft against the spring bias and thereby release the luminal tissue; and a controller responsive to a control signal, wherein the controller activates the controlled detachment mechanism, and wherein the medical device remains completely within the body lumen until after the device is detached from the surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for attaching and detaching a medical device within a body lumen of a patient, the method comprising:
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positioning the medical device at a target location within the body lumen; activating a fixation mechanism carried by the medical device to attach the medical device to a surface within the body lumen wherein the fixation mechanism includes; a cavity formed in the device housing, a shaft to capture luminal tissue within the cavity, and a spring to bias the shaft toward the luminal tissue, wherein activating the fixation mechanism includes advancing the shaft to capture the tissue; and activating the fixation mechanism with a controlled mechanically actuated detachment mechanism carried by the medical device to detach the medical device from the surface of the body lumen without endoscopic intervention, wherein the detachment mechanism includes a solenoid coil wound about the shaft and wherein activating the detachment mechanism includes energizing the solenoid coil to drive the shaft against the spring bias and thereby release the luminal tissue and wherein the detachment mechanism is activated in response to receipt of a control signal from a controller external to the body lumen. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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23. A medical device comprising:
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a device housing sized for introduction into and residence completely within the body lumen; a fixation mechanism to attach the device housing to a surface within the body lumen, wherein the fixation mechanism includes a spring to bias a shaft toward the tissue; and a controlled detachment mechanism to selectively detach the device housing from the surface of the body lumen, wherein the detachment mechanism includes a solenoid coil wound about the shaft and a circuit to energize the solenoid coil to drive the shaft against the spring bias and thereby release the luminal tissue. - View Dependent Claims (24)
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Specification