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US 12,496,050 B2Granted
Oscillating syringe system and needle
AssigneePraxis Holding LLC
InventorsJohn Steele Fisher, Nathaniel H. Pariseau, Wayne A. Noda, Daniel Hyman, Jon Jacobson, Christopher M. Drake, Matt Pursley
Life of this patent
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Abstract
A syringe is coupled to a biopsy needle through a coupling structure that includes a motor-driven element such as a gear to rotate the needle. The motor can oscillate back and forth to cause the needle to oscillate. Structures are described to permit one-handed operation of the device and automatic motor activation based on attaining a desired plunger position. Non-electric motors are described along with a mechanism for axial oscillation of the needle.
Claims20
A tissue extraction device, comprising:
- a syringe coupled to an elongated needle, wherein the needle is configured to rotate relative to the syringe;
- an evacuatable tissue chamber being established at least in part by a hollow interior of the needle and configured to be subject to a vacuum;
- a motor operably coupled to the needle to oscillate the needle back and forth in a longitudinal direction;
- the needle further including:
- a proximal end and a distal end with a main body extending therebetween;
- a cutting tip located at the distal end;
- a central longitudinal axis extending between the proximal end and the distal end;
- the hollow interior of the needle in fluidic communication with the syringe;
- a first cutting aperture disposed through the main body, wherein the first cutting aperture has a rectangular shape with a long end of the rectangular shape extending parallel to the central longitudinal axis of the needle;
- a second cutting aperture disposed through the main body, wherein the second cutting aperture has a rectangular shape with a long end of the rectangular shape extending parallel to the central longitudinal axis of the needle;
- each of the first cutting aperture and the second cutting apertures creating a channel with a central axis extending from an exterior surface to an interior surface of the main body, wherein the central axes are axially aligned with each other;
- and
- the first cutting aperture and the second cutting apertures longitudinally spaced in a proximal direction from the distal end of the main body, such that there is a continuous portion of the main body between the first cutting aperture and the second cutting aperture and the distal end of the main body.
10 more elements
A device comprising:
- a needle, the needle further including:
- a proximal end and a distal end with a main body extending therebetween;
- a hollow interior extending through the main body;
- a first cutting aperture disposed through the main body;
- a second cutting aperture disposed through the main body;
- each of the first cutting aperture and the second cutting apertures creating a channel with a central axis extending from an exterior surface to an interior surface of the main body, wherein the central axes of the channels are axially aligned relative to each other;
- and
- the first cutting aperture and the second cutting aperture longitudinally spaced in a proximal direction from the distal end of the main body, such that there is a continuous portion of the main body between the first cutting aperture and the second cutting apertures and the distal end of the main body;
- a motor operably coupled to the needle to rotate the needle about a central longitudinal axis of the needle and reciprocate the needle in an axial direction relative to the central longitudinal axis;
- a switch to energize the motor;
- a barrel and a plunger slidably disposed in the barrel and movable to evacuate the barrel;
- and
- a plunger activation assembly configured to operably engage the plunger, the plunger activation assembly being movable to open and close the switch.
10 more elements
Dependencies are inferred from the claim text.