Firing system for biopsy device
First Claim
1. A handheld biopsy device for harvesting at least one tissue sample from a suspect tissue mass in a body of a living being, comprising:
- a hollow needle including a distal end having a circumferential cutting edge;
a needle driving member secured to the hollow needle;
a sample-receiving device with a cavity configured to receive a severed tissue sample, the sample-receiving device configured to be received in the hollow needle and movable therein;
a first user-operable firing mechanism configured to cause the hollow needle and the sample-receiving device to be longitudinally displaced in a distal direction, so as to penetrate body tissue at or near the suspect tissue mass;
a second user-operable firing mechanism configured to cause the hollow needle to be longitudinally displaced relative to the sample-receiving device in a distal direction from a first position, in which the sample-receiving device projects from the distal end of the hollow needle, to a second position, in which the hollow needle essentially accommodates the cavity of the sample-receiving device, so as to sever the tissue sample from remaining body tissue at the harvesting site; and
a handle unit, which completely contains the first and second user-operable firing mechanisms, the first and second user-operable firing mechanisms being configured for selectable operation between a first mode in which the first user-operable firing mechanism and the second user-operable firing mechanism are fired in sequence to facilitate harvesting of the tissue sample, and a second mode in which only the second user-operable firing mechanism is fired to facilitate the harvesting of the tissue sample, and wherein the hollow needle, the sample-receiving device and the needle driving member are comprised in a disposable unit, which is releasably attached to the handle unit.
3 Assignments
0 Petitions
Accused Products
Abstract
A biopsy device for harvesting tissue samples from a suspect tissue mass in a body of a living being, e.g. in percutaneous aspiration biopsy, includes a hollow needle and a sample-receiving device, which is movable in the hollow needle. A first user-operable firing mechanism is provided for causing the hollow needle and the sample-receiving device to be substantially simultaneously displaced in a distal direction, so as to penetrate body tissue at or near the suspect tissue mass. A second user-operable firing mechanism may cause the hollow needle solely to be longitudinally displaced in a distal direction from a position, in which the sample-receiving device projects from the distal end of the hollow needle, to a position, in which the hollow needle essentially accommodates the sample-receiving device, so as to sever the tissue sample from remaining body tissue at the harvesting site.
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Citations
24 Claims
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1. A handheld biopsy device for harvesting at least one tissue sample from a suspect tissue mass in a body of a living being, comprising:
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a hollow needle including a distal end having a circumferential cutting edge; a needle driving member secured to the hollow needle; a sample-receiving device with a cavity configured to receive a severed tissue sample, the sample-receiving device configured to be received in the hollow needle and movable therein; a first user-operable firing mechanism configured to cause the hollow needle and the sample-receiving device to be longitudinally displaced in a distal direction, so as to penetrate body tissue at or near the suspect tissue mass; a second user-operable firing mechanism configured to cause the hollow needle to be longitudinally displaced relative to the sample-receiving device in a distal direction from a first position, in which the sample-receiving device projects from the distal end of the hollow needle, to a second position, in which the hollow needle essentially accommodates the cavity of the sample-receiving device, so as to sever the tissue sample from remaining body tissue at the harvesting site; and a handle unit, which completely contains the first and second user-operable firing mechanisms, the first and second user-operable firing mechanisms being configured for selectable operation between a first mode in which the first user-operable firing mechanism and the second user-operable firing mechanism are fired in sequence to facilitate harvesting of the tissue sample, and a second mode in which only the second user-operable firing mechanism is fired to facilitate the harvesting of the tissue sample, and wherein the hollow needle, the sample-receiving device and the needle driving member are comprised in a disposable unit, which is releasably attached to the handle unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A handheld biopsy device for harvesting at least one tissue sample from a suspect tissue mass in a body of a living being, comprising:
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a hollow needle with a distal end portion adapted to be introduced into the body, the hollow needle including a distal end having a circumferential cutting edge; a sample-receiving device with a cavity for receiving a severed tissue sample, the sample-receiving device being receivable in the hollow needle and movable therein; a first firing mechanism configured to cause the hollow needle and the sample-receiving device to be longitudinally displaced in a distal direction, so as to penetrate body tissue at or near the suspect tissue mass; a second firing mechanism configured to cause the hollow needle to be longitudinally displaced in a distal direction from a first position, in which the sample-receiving device projects from the distal end of the hollow needle, to a second position, in which the hollow needle essentially accommodates the cavity of the sample-receiving device, so as to sever the tissue sample from remaining body tissue at the harvesting site; a control system configured to control the first firing mechanism and the second firing mechanism; a trigger element configured to sequentially actuate the first firing mechanism and the second firing mechanism, the trigger element having a first movement segment and a second movement segment; and a power-driven element configured to move the trigger element, the control system being configured to control the power driven element to move the trigger element such that the first firing mechanism is loaded for firing and then fired during the first movement segment of the trigger element and such that the second firing mechanism is loaded for firing and then fired during the second movement segment of the trigger element. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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23. A method of harvesting at least one tissue sample from a suspect tissue mass in a body of a living being by using a handheld biopsy device, the method comprising:
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introducing a hollow needle of the handheld biopsy device into the body, so as to place a distal end portion of the hollow needle near the suspect tissue mass, the hollow needle including a distal end having a circumferential cutting edge and the hollow needle accommodating a sample-receiving device of the handheld biopsy device, the sample-receiving device having a cavity for receiving the at least one tissue sample, the sample-receiving device being movable in a longitudinal direction in the hollow needle between a first extended position, in which a distal end of the cavity of the sample-receiving device projects from a distal tip of the hollow needle, and a second retracted position, which is proximal with respect to the first position; selectively coupling the sample-receiving device to a first firing mechanism contained within the handheld biopsy device; activating the first firing mechanism contained within the handheld biopsy device to thereby cause the hollow needle and the sample-receiving device to be longitudinally displaced in a distal direction, so as to cause a tip of the sample-receiving device and the distal end portion of the hollow needle to penetrate the suspect tissue mass; uncoupling the sample-receiving device from the first firing mechanism; activating a retracting mechanism of the handheld biopsy device to retract the hollow needle to a first position, in which the sample-receiving device projects from the distal end of the hollow needle; activating a second firing mechanism contained within the handheld biopsy device to thereby cause the hollow needle to be longitudinally displaced in the distal direction to a second position, in which the hollow needle essentially accommodates the cavity of the sample-receiving device, so as to sever a first body tissue sample from remaining body tissue at the suspect tissue mass; activating a transport device of the handheld biopsy device to move the sample-receiving device in the hollow needle to the second retracted position; and activating an ejection mechanism of the handheld biopsy device to eject said first body tissue sample from the cavity, when the sample-receiving device is in the second retracted position. - View Dependent Claims (24)
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Specification