Tissue puncture closure device with automatic torque sensing tamping system
AssigneeSt. Jude Medical Puerto Rico LLC
InventorAndrew Thomas Forsberg
Life of this patent
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Abstract
Methods and apparatus for sealing a puncture or incision formed percutaneously in tissue separating two internal portions of the body of a living being with an anchor, a sealing plug and a filament connecting the anchor and sealing plug are disclosed. The methods and apparatus provide for automatic tamping of the sealing plug. In addition, torque required to tamp the sealing plug is automatically sensed and gear ratios of an automatic tamping device are automatically changed in response to sensed changes in torque. A planetary transmission may be used to automatically change gear ratios in response to the changes in torque.
Claims20
A tissue puncture closure device, comprising:
- a filament extending from a first end of the closure device to a second end of the closure device;
- an anchor attached to the filament at the second end of the closure device, the anchor being insertable through a tissue puncture;
- a sealing plug slidingly attached to the filament at a location proximal of the anchor;
- a tamping assembly operable to compact the sealing plug toward the anchor, the tamping assembly comprising a tamping tube and an automatic transmission, the automatic transmission comprising an input gear arranged coaxially with a filament spool, an output gear arranged in contact with the tamping tube, and a plurality of intermediate gears operable between the input and output gears, the automatic transmission being operable to automatically change a gear ratio between the input and output gears for achieving at least two different, non-zero speeds for advancing the tamping tube toward the sealing plug.
A tissue puncture closure device, comprising:
- a filament extending from a first end of the closure device to a second end of the closure device;
- an anchor attached to the filament at the second end of the closure device and positionable through a tissue puncture;
- a sealing plug slidingly attached to the filament and arranged adjacent to the anchor;
- a tamping assembly operable to compact the sealing plug toward the anchor, the tamping assembly comprising a tamping tube and an automatic transmission, the automatic transmission comprising a filament spool about which a portion of the filament is wound, a planetary gearset, an input gear arranged coaxial with the filament spool, and an output gear arranged in contact with the tamping tube, the planetary gearset automatically switching upon application of a withdrawal force to the tissue puncture closure device between a low torque setting in which the planetary gearset operates as a single gear providing a first gear ratio between the input and output gears, and a high torque setting in which the planetary gearset operates as a plurality of gears providing a second gear ratio between the input and output gears.
A tissue puncture closure device, comprising:
- a filament extending from a first end of the closure device to a second end of the closure device;
- an anchor attached to the filament at the second end of the closure device and positionable through a tissue puncture;
- a sealing plug slidingly attached to the filament and arranged adjacent to the anchor;
- a tamping assembly operable to compact the sealing plug toward the anchor, the tamping assembly comprising a tamping tube and an automatic transmission, the automatic transmission comprising a filament spool about which a portion of the filament is wound, an input gear coupled to the filament spool, an output gear coupled to the tamping tube, and a planetary gearset, the planetary gearset being operable to automatically change a gear ratio from a first non-zero speed to at least a second non-zero speed, multiply torque received from the input gear, and transmit the multiplied torque to the output gear upon applying a withdrawal force to the tissue puncture closure device.
Dependencies are inferred from the claim text.