초록 ▼

A biopsy device utilizes three components: a housing having an attached cannula, a drill bit/plunger component which is mounted in the housing so that the drill bit portion, having a cutting tip, extends through the cannula, the plunger snugly fitting within the housing, and a rotational energy elem

A biopsy device utilizes three components: a housing having an attached cannula, a drill bit/plunger component which is mounted in the housing so that the drill bit portion, having a cutting tip, extends through the cannula, the plunger snugly fitting within the housing, and a rotational energy element which couples with the drill bit/plunger component to enable the impartation of rotational motion to the cutting tip. Both drilling and aspirating action are utilized to retrieve a biopsy sample. In operation, the tissue to be sampled is punctured by a biopsy needle, the cannula of which is connected to the biopsy device. Thereafter, rotational energy is imparted to the drill bit/plunger component, causing tissue to be accumulated on the cutting tip. Once a sufficient amount of tissue has been accumulated, the rotational energy element and plunger/drill bit component are displaced in a proximal direction from the housing to cause the sample to be aspirated into the cannula syringe. The biopsy device is withdrawn from the tissue, and the sample is retrieved by exerting longitudinal pressure in a distal direction on the rotational energy element and, in turn, the drill bit/plunger component.

대표청구항 ▼

A device for obtaining biopsy samples, said device comprising: a housing having proximal and distal ends and a distal tip terminating the distal end, a cannula having proximal and distal ends mounted at the distal end of said housing, the distal tip of said housing being open; a drill bit/plunger co

A device for obtaining biopsy samples, said device comprising: a housing having proximal and distal ends and a distal tip terminating the distal end, a cannula having proximal and distal ends mounted at the distal end of said housing, the distal tip of said housing being open; a drill bit/plunger component slidably mounted in said housing, said drill bit/plunger component including a plunger and a drill bit having proximal and distal ends with a cutting tip at the distal end of said drill bit, said drill bit extending through said plunger in a fluid-tight seal, said drill bit/plunger component being sized to fit within said housing such that when said drill bit/plunger component is inserted in said housing, said drill bit passes through said cannula and such that when said plunger abuts the distal end of said housing, said cutting tip extends beyond the distal end of said cannula, a rotational energy element for providing rotational energy to said drill bit/plunger component, coupling means for coupling said rotational energy element to said drill bit/plunger component, and means for actuating said rotational energy element so as to impart rotational movement to said coupling means and said component.