Vacuum powered rotary devices and methods
First Claim
Patent Images
1. A medical device for cutting tissue from the human body comprising:
- a shaft having a proximal end, a distal end, and a lumen extending there between, wherein the shaft has an opening at the distal end and a sharpened edge surrounding at least a portion of a perimeter of the opening, wherein the shaft is rotatable about a central axis of the shaft, wherein the shaft is coaxially positioned within an outer shaft;
a mechanism powered by suction from a vacuum source, wherein the mechanism is configured to produce a linear reciprocating motion;
a component coupled to the mechanism and coupled to the shaft, wherein the component is configured to convert the linear reciprocating motion to rotary motion, thereby causing the shaft to rotate to cut tissue; and
a shaft position control, wherein the shaft position control is configured to axially translate the outer shaft or the shaft.
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Abstract
The present devices and methods relate generally to vacuum or suction powered medical devices and methods for cutting, resecting, excising, morcellating and/or evacuating tissue from various regions of a patient'"'"'s body. In certain variations, the devices may produce a rotational motion by converting a linear reciprocating motion to a rotational motion, causing a cutting shaft or other tool to rotate to perform work on a tissue in various regions of the body.
297 Citations
42 Claims
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1. A medical device for cutting tissue from the human body comprising:
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a shaft having a proximal end, a distal end, and a lumen extending there between, wherein the shaft has an opening at the distal end and a sharpened edge surrounding at least a portion of a perimeter of the opening, wherein the shaft is rotatable about a central axis of the shaft, wherein the shaft is coaxially positioned within an outer shaft; a mechanism powered by suction from a vacuum source, wherein the mechanism is configured to produce a linear reciprocating motion; a component coupled to the mechanism and coupled to the shaft, wherein the component is configured to convert the linear reciprocating motion to rotary motion, thereby causing the shaft to rotate to cut tissue; and a shaft position control, wherein the shaft position control is configured to axially translate the outer shaft or the shaft. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A medical device for cutting tissue from the human body comprising:
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a shaft having a proximal end, a distal end, and a lumen extending there between, wherein the shaft has an opening at the distal end and a sharpened edge surrounding at least a portion of a perimeter of the opening, wherein the shaft is rotatable about a central axis of the shaft; a mechanism powered by suction from a vacuum source, wherein the mechanism is configured to produce a linear reciprocating motion; and a component coupled to the mechanism and coupled to the shaft, wherein the component is configured to convert the linear reciprocating motion to rotary motion, thereby causing the shaft to rotate to cut tissue, wherein the component comprises a rack and pinion gear assembly having one or more racks and one or more gears, wherein the rack is coupled to the mechanism such that linear reciprocating motion produced by the mechanism causes the rack to reciprocate, wherein the reciprocating rack drives the pinion gear in an oscillating rotary motion. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A medical device for cutting tissue from the human body comprising:
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a shaft having a proximal end, a distal end, and a lumen extending there between, wherein the shaft has an opening at the distal end and a sharpened edge surrounding at least a portion of a perimeter of the opening, wherein the shaft is rotatable about a central axis of the shaft; a mechanism powered by suction from a vacuum source, wherein the mechanism is configured to produce a linear reciprocating motion; and a component coupled to the mechanism and coupled to the shaft, wherein the component is configured to convert the linear reciprocating motion to rotary motion, thereby causing the shaft to rotate to cut tissue, wherein the component comprises a gear and a crank arm, wherein the gear is coupled to the mechanism via the crank arm and the linear reciprocating motion produced by the mechanism causes the crank arm to rotate the gear. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A medical device for cutting tissue from the human body comprising:
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a shaft having a proximal end, a distal end, and a lumen extending there between, wherein the shaft has an opening at the distal end and a sharpened edge surrounding at least a portion of a perimeter of the opening, wherein the shaft is rotatable about a central axis of the shaft; a mechanism powered by suction from a vacuum source, wherein the mechanism is configured to produce a linear reciprocating motion; a component coupled to the mechanism and coupled to the shaft, wherein the component is configured to convert the linear reciprocating motion to rotary motion, thereby causing the shaft to rotate to cut tissue, wherein the component comprises a gear and a crank arm, wherein the gear is coupled to the mechanism via the crank arm and the linear reciprocating motion produced by the mechanism causes the crank arm to rotate the gear; and a cam lobe coupled to the gear and a cam follower, wherein the cam follower is configured to exert a force on the cam lobe to cause the gear to translate into a position wherein the vacuum powered mechanism is unlikely to stall. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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Specification