Medical device fixation
First Claim
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1. An implantable medical device (IMD) comprising:
- a body containing electronics;
a fixation device connected to the body of the device, wherein the fixation device comprises;
a temporary fixation mechanism comprising a biodegradable material and configured to anchor the IMD within a blood vessel of a patient after implantation until the temporary fixation mechanism biodegrades; and
a chronic fixation mechanism overlaying a first side of the body and configured to promote tissue growth along the first side of the body that anchors the IMD within the blood vessel of the patient before the temporary fixation mechanism biodegrades such that the chronic fixation mechanism is configured to more permanently anchor the IMD to the blood vessel than the temporary fixation mechanism,wherein the temporary fixation mechanism is configured to anchor the IMD within the blood vessel such that the first side of the body including the chronic fixation mechanism is arranged against endothelium of the blood vessel, andwherein the chronic fixation mechanism comprises a sheet of tissue growth promoting material configured to be connected to the IMD housing and configured to promote tissue growth into the material to secure the IMD within the blood vessel of the patient before the temporary fixation mechanism biodegrades, wherein the sheet of tissue growth promoting material comprises a rectangular sheet of tissue growth promoting material defined by four edges, and wherein a first edge is attached to the outer surface of the IMD housing and a second edge generally parallel to and offset from the first edge is attached to the outer surface of the IMD housing.
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Abstract
A fixation device configured to anchor an implantable medical device within a patient includes a temporary biodegradable fixation mechanism configured to secure the device after implantation until the temporary fixation mechanism biodegrades and a chronic fixation mechanism configured to promote tissue growth that secures the device to tissue of the patient before the temporary fixation mechanism biodegrades.
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Citations
35 Claims
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1. An implantable medical device (IMD) comprising:
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a body containing electronics; a fixation device connected to the body of the device, wherein the fixation device comprises; a temporary fixation mechanism comprising a biodegradable material and configured to anchor the IMD within a blood vessel of a patient after implantation until the temporary fixation mechanism biodegrades; and a chronic fixation mechanism overlaying a first side of the body and configured to promote tissue growth along the first side of the body that anchors the IMD within the blood vessel of the patient before the temporary fixation mechanism biodegrades such that the chronic fixation mechanism is configured to more permanently anchor the IMD to the blood vessel than the temporary fixation mechanism, wherein the temporary fixation mechanism is configured to anchor the IMD within the blood vessel such that the first side of the body including the chronic fixation mechanism is arranged against endothelium of the blood vessel, and wherein the chronic fixation mechanism comprises a sheet of tissue growth promoting material configured to be connected to the IMD housing and configured to promote tissue growth into the material to secure the IMD within the blood vessel of the patient before the temporary fixation mechanism biodegrades, wherein the sheet of tissue growth promoting material comprises a rectangular sheet of tissue growth promoting material defined by four edges, and wherein a first edge is attached to the outer surface of the IMD housing and a second edge generally parallel to and offset from the first edge is attached to the outer surface of the IMD housing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An assembly comprising:
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an implantable medical device (IMD) comprising a housing containing electronics; and a fixation device for the IMD, the fixation device comprising; a temporary fixation mechanism connected to the IMD, wherein the temporary fixation mechanism comprises a biodegradable material and is configured to anchor the IMD within a blood vessel of a patient after implantation until the temporary fixation mechanism biodegrades; and a chronic fixation mechanism overlaying a first side of the IMD housing, wherein the chronic fixation mechanism is configured to promote tissue growth along the first side of the IMD housing that anchors the IMD within the blood vessel before the temporary fixation mechanism biodegrades such that the chronic fixation mechanism is configured to more permanently anchor the IMD to the blood vessel than the temporary fixation mechanism, wherein the chronic fixation mechanism comprises a sheet of tissue growth promoting material configured to be connected to the IMD housing and configured to promote tissue growth into the material to secure the IMD within the blood vessel of the patient before the temporary fixation mechanism biodegrades, wherein the sheet of tissue growth promoting material comprises a rectangular sheet of tissue growth promoting material defined by four edges, and wherein a first edge is attached to the outer surface of the IMD housing and a second edge generally parallel to and offset from the first edge is attached to the outer surface of the IMD housing, and wherein the temporary fixation mechanism is configured to anchor the IMD within the blood vessel such that the first side of the IMD housing, including the chronic fixation mechanism, is arranged against endothelium of the blood vessel. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A method of securing an implantable medical device (IMD) within the body of a patient, the method comprising:
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arranging the IMD at a target location within a blood vessel of the patient, wherein the IMD comprises a housing containing electronics; temporarily anchoring the IMD within the blood vessel with a temporary fixation mechanism comprising a biodegradable material, wherein the temporary fixation mechanism is configured to secure the IMD within the blood vessel after implantation until the temporary fixation mechanism biodegrades; and chronically anchoring the IMD within the blood vessel with a chronic fixation mechanism overlaying a first side of the IMD housing and configured to promote tissue growth along the first side of the IMD housing that secures the IMD within the blood vessel before the temporary fixation mechanism biodegrades, wherein the chronic fixation mechanism is configured to more permanently anchor the IMD to the blood vessel than the temporary fixation mechanism, wherein the temporary fixation mechanism is configured to anchor the IMD within the blood vessel such that the first side of the IMD housing including the chronic fixation mechanism is arranged against endothelium of the blood vessel, and wherein the chronic fixation mechanism comprises a sheet of tissue growth promoting material configured to be connected to the IMD housing and configured to promote tissue growth into the material to secure the IMD within the blood vessel of the patient before the temporary fixation mechanism biodegrades, wherein the sheet of tissue growth promoting material comprises a rectangular sheet of tissue growth promoting material defined by four edges, and wherein a first edge is attached to the outer surface of the IMD housing and a second edge generally parallel to and offset from the first edge is attached to the outer surface of the IMD housing. - View Dependent Claims (35)
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Specification