Incisional breast biopsy device
AssigneeImagyn Medical Technologies California, Inc.
InventorsScott Heneveld, Mark Zyzelewski, Warren D. Lun, Mark A. Penrod
Life of this patent
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Abstract
A breast biopsy device is provided which includes a localization needle having a guide wire preloaded into the biopsy device. The device includes a stylet having a blade for transecting and separating healthy tissue on route to the biopsy site. The use of the stylet blade reduces the trauma to healthy breast tissue. The device further includes a cannula blade and a garrote for forming a cut transverse to the core cut by the cannula blade. A lockout feature prevents the garrote from deploying until after a cutting plane of the garrote has been advanced beyond the end of the guide wire.
Claims18
A device for removing suspect breast tissue comprising:
- a stylet mounted on a retracting handle, said stylet having a tip containing a plurality of blades for transecting tissue and a central passage capable of receiving a localization needle;
- a cannula mounted on a drive mechanism, said cannula having a shaft that supports a cutting surface opposite said drive mechanism;
- said drive mechanism for simultaneously rotating said cannula and moving said cannula in a direction that is transverse to the rotation of said cannula;
- a garrote for performing a cut transverse to the longitudinal axis of the cannula, said garrote mounted adjacent to said cutting surface of said cannula;
- a trigger for deploying said garrote, said trigger including a locking mechanism for preventing deployment of said garrote prior to movement of said cannula a predetermine distance, said locking mechanism has a locked position and an unlocked position, in the locked position the trigger abuts a trigger stop and in the unlocked position a ramp lifts the trigger above the trigger stop;
- and
- a localization needle having a guide wire mounted within said needle.
A device for removing suspect breast tissue comprising:
- a stylet mounted on a retracting handle, said stylet having a tip containing a plurality of blades for transecting tissue and a central passage capable of receiving a localization needle;
- a cannula mounted on a drive mechanism, said cannula having a shaft that supports a cutting surface opposite said drive mechanism;
- said drive mechanism for simultaneously rotating said cannula and moving said cannula in a direction that is transverse to the rotation of said cannula;
- a garrote for performing a cut transverse to the longitudinal axis of the cannula, said garrote mounted adjacent to said cutting surface of said cannula;
- a trigger for deploying said garrote, said trigger including a locking mechanism for preventing deployment of said garrote prior to movement of said cannula a predetermine distance, said locking mechanism is moved from a locked position to an unlocked position by rotation of a gear member which causes longitudinal motion of a spline;
- and
- a localization needle having a guide wire mounted within said needle.
Dependencies are inferred from the claim text.