# US 8,352,028 B2 · Intravascular medical device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,352,028 B2 - Document ID: US8352028B2 - Status: Granted - Kind: B2 - Application number: 12/767,176 - Filed: 2010-04-26 - Published: 2011-09-29 - Granted: 2013-01-08 - Earliest claimed: 2010-03-26 - Assignees: Medtronic, Inc. - Inventors: William K Wenger - Web page: https://patentgrep.com/patent/US8352028B2 ## CPC - A61N 1/37512: {Pacemakers} - A61N 1/37516: {Intravascular implants} - A61N 1/37518: {Anchoring of the implants, e.g. fixation} - A61B 17/3468: {for implanting or removing devices, e.g. prostheses, implants, seeds, wires (devices for implanting seeds A61M37/0069)} - A61N 1/0573: {chacterised by means penetrating the heart tissue, e.g. helix needle or hook} - A61N 1/37205: {Microstimulators, e.g. implantable through a cannula} - A61N 1/3756: {Casings with electrodes thereon, e.g. leadless stimulators} - A61N 2001/058: {Fixing tools} - A61N 2001/0585: {Coronary sinus electrodes} - A61N: ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY (measurement of bioelectric currents A61B; surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body A61B18/00; anaesthetic apparatus in general A61M; incandescent lamps H01K; infrared radiators for heating H05B) - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract An implantable medical device system, including an implantable medical device and an associated implant tool. The device has a hermetic housing containing a power source and electronic circuitry. One or more tines are mounted to the housing movable from a first position extending away from the housing to a second position adjacent the housing. The device is provided with a rotational fixation mechanism. The Implant tool includes an elongated sheath sized to receive the device and provided with internal grooves sized to engage with the tines when the tines are located in their second position. The implant tool may further include a push tool located with the sheath and movable within the sheath to advance the device distally out of the sheath. The sheath may be provided with a closed distal end openable by passage of the device therethrough. ## Claims ### Claim 1 An implantable medical device system, comprising: an implantable medical device comprising: a hermetic housing containing a power source and electronic circuitry, one or more tines mounted to the housing movable from a first position extending away from the housing to a second position adjacent the housing and a rotational fixation mechanism; and an implant tool, comprising an elongated sheath sized to receive the device and provided with internal grooves sized to engage with the tines when the tines are located in their second position; and wherein the implant tool further comprises a push tool located with the sheath and movable within the sheath to advance the device distally out of the sheath. ### Claim 2 (depends on 1) A system according to claim 1 wherein the push tool comprises means for releaseably engaging the medical device. ### Claim 3 An implantable medical device system, comprising: an implantable medical device comprising: a hermetic housing containing a power source and electronic circuitry, one or more tines mounted to the housing movable from a first position extending away from the housing to a second position adjacent the housing and a rotational fixation mechanism; and an implant tool, comprising an elongated sheath sized to receive the device and provided with internal grooves sized to engage with the tines when the tines are located in their second position; and wherein the sheath comprises a closed distal end openable by passage of the medical device therethrough. ### Claim 4 (depends on 3) A system according to claim 3 wherein the distal end of the sheath comprises weakened zones between adjacent portions of the distal end. ### Claim 5 A method of implanting a medical device system, comprising: inserting an implantable medical device into an implant tool, wherein; the medical device comprises a hermetic housing containing a power source and electronic circuitry, one or more tines mounted to the housing movable from a first position extending away from the housing to a second position adjacent the housing and a rotational fixation mechanism; and the implant tool comprises an elongated sheath sized to receive the device and provided with internal grooves sized to engage with the tines when the tines are located in their second position, wherein the implant tool further comprises a push tool located with the sheath and movable within the sheath to advance the device medical distally out of the sheath; and advancing the device distally out of the sheath using the push tool. ### Claim 6 (depends on 5) A method according to claim 5, wherein the push tool comprises means for releaseably engaging the medical device, comprising disengaging the device from the push tool. ### Claim 7 A method of implanting a medical device system, comprising: inserting an implantable medical device into an implant tool, wherein; the medical device comprises a hermetic housing containing a power source and electronic circuitry, one or more tines mounted to the housing movable from a first position extending away from the housing to a second position adjacent the housing and a rotational fixation mechanism; and the implant tool comprises an elongated sheath sized to receive the device and provided with internal grooves sized to engage with the tines when the tines are located in their second position; and advancing the medical device to a desired implant location using the implant tool; and wherein the sheath comprises a closed distal end openable by passage of the medical device therethrough, comprising opening the distal end by passage of the device therethrough. ### Claim 8 (depends on 7) A method according to claim 7, wherein the distal end of the sheath comprises weakened zones between adjacent portions of the distal end, comprising separating the adjacent portions of the distal end by passage of the device therethrough.