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 with a distal end portion adapted to be introduced into the body, the hollow needle comprising a circumferential cutting edge at its distal end;
a sample-receiving device with a cavity for receiving the at least severed tissue sample, the sample-receiving device being receivable in the hollow needle and movable therein;
a first user-operable firing mechanism for causing 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 for causing 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 said tissue sample from remaining body tissue at the harvesting site.
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Accused Products
Abstract
A biopsy system for harvesting tissue samples from a suspect tissue mass in a body of a living being, e.g. in per-cutaneous aspiration biopsy, comprises a hollow needle (50) and a sample-receiving device (52), which is movable in the hollow needle. A first user-operable firing mechanism (110) 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 (112) may cause the hollow needle solely to be longitudinally displaced in a distal direction from a position, in which the sample-receiving device (52) projects from the distal end of the hollow needle (50), to a position, in which the hollow needle essentially accommodates the sample-receiving device, so as to sever said tissue sample from remaining body tissue at the harvesting site.
164 Citations
26 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 with a distal end portion adapted to be introduced into the body, the hollow needle comprising a circumferential cutting edge at its distal end; a sample-receiving device with a cavity for receiving the at least severed tissue sample, the sample-receiving device being receivable in the hollow needle and movable therein; a first user-operable firing mechanism for causing 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 for causing 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 said tissue sample from remaining body tissue at the harvesting site. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A disposable unit for a handheld biopsy device for harvesting at least one tissue sample from a suspect tissue mass in a body of a living being, the disposable unit comprising:
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a hollow needle with a distal end portion adapted to be introduced into the body, the hollow needle defining a circumferential cutting edge at its distal end; a sample-receiving device with a cavity for receiving the severed tissue sample, the sample-receiving device being receivable in the hollow needle and movable therein;
the disposable unit being releasably attachable to a handle unit comprising;a first user-operable firing mechanism for causing 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 for causing 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 separate said tissue sample from remaining body tissue at the harvesting site.
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25. A method of harvesting at least one tissue sample from a suspect tissue mass in a body of a living being by means of a handheld biopsy device, the method comprising the steps of:
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introducing a hollow needle with a distal end portion into the body, so as to place the distal end portion near the suspect tissue mass, the hollow needle comprising a circumferential cutting edge at its distal end and accommodating a sample-receiving device with 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; activating a first firing mechanism 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; retracting 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 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 one of said at least one tissue sample from remaining body tissue at the suspect tissue mass; moving the sample-receiving device in the hollow needle to its second retracted position; ejecting said first body tissue sample from the cavity, when the sample-receiving device is in its second retracted position. - View Dependent Claims (26)
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Specification