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US 6,165,136 AGranted
Semi-automatic biopsy device and related method of use
AssigneeSciMed Life Systems, Inc.
InventorSrinivas Nishtala
Life of this patent
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Abstract
A tissue sampling device, comprising a stylet having a notch therein and a cannula at least partially surrounding the stylet. The notch has an exposed portion for receiving tissue to be sampled, and the cannula is adjustable relative to the stylet to vary the size of the exposed portion and therefore the amount of tissue to be sampled. The device also comprises a trigger mechanism operatively connected to at least one of the cannula and the stylet. Actuation of the trigger mechanism causes relative movement of the stylet with respect to the cannula for collection of a tissue sample.
Claims18
A tissue sampling device, comprising:
- a stylet having a notch therein, the notch having an exposed portion for receiving tissue to be sampled;
- a cannula at least partially surrounding the stylet, the cannula being adjustable relative to the stylet to vary the size of the exposed portion and therefore the amount of tissue to be sampled;
- and
- a trigger mechanism operatively connected to at least one of the cannula and the stylet, wherein actuation of the trigger mechanism causes relative movement of the stylet with respect to the cannula for collection of a tissue sample,
- wherein the trigger mechanism is adapted to be actuated in a first way to adjust the cannula relative to the stylet to vary the size of the exposed portion of the notch prior to collection of a tissue sample, and is adapted to be actuated in a second way to cause relative movement the stylet and the cannula for collection of a tissue sample.
2 more elements
A tissue sampling device, comprising:
- a stylet having a notch and a cannula at least partially surrounding the stylet and movable with respect to the stylet;
- a trigger mechanism operatively connected to at least one of the cannula and the stylet, wherein actuation of the trigger mechanism causes relative movement of the stylet with respect to the cannula for collection of a tissue sample;
- and
- a locking mechanism operatively connected to the trigger mechanism, wherein the locking mechanism selectively prevents relative movement between the cannula and the stylet after the stylet has been inserted into the patient and before the stylet moves with respect to the cannula for collection of a tissue sample,
- wherein the locking mechanism is adapted to bias into a locked state by a resilient member.
2 more elements
A method of sampling tissue, comprising:
- providing a tissue sampling device having a stylet with a notch therein, the stylet being at least partially surrounded by a cannula;
- actuating a trigger mechanism to move the cannula relative to the stylet to adjust an amount of the notch exposed by the cannula and an amount of target tissue to be sampled;
- advancing an end of the stylet into a target tissue area so that the target tissue prolapses into the exposed amount of the notch;
- and
- effecting relative movement of the cannula and the stylet such that the cannula resects and collects the target tissue in the notch.
2 more elements
A method of sampling tissue, comprising:
- providing a tissue sampling device having a stylet with a notch therein, the stylet being at least partially surrounded by a cannula;
- moving the cannula relative to the stylet to adjust an amount of the notch exposed by the cannula and an amount of target tissue to be sampled;
- advancing an end of the stylet into a target tissue area so that the target tissue prolapses into the exposed amount of the notch;
- effecting relative movement of the cannula and the stylet such that the cannula resects and collects the target tissue in the notch;
- and
- confirming the presence of the target tissue in the notch before effecting relative movement of the cannula and the stylet to resect and collect the target tissue in the notch.
3 more elements
A method of sampling tissue, comprising:
- providing a tissue sampling device having a stylet with a notch therein, the stylet being at least partially surrounded by a cannula;
- moving the cannula relative to the stylet to adjust an amount of the notch exposed by the cannula and an amount of target tissue to be sampled;
- advancing an end of the stylet into a target tissue area so that the target tissue prolapses into the exposed amount of the notch;
- and
- effecting relative movement of the cannula and the stylet such that the cannula resects and collects the target tissue in the notch;
- wherein actuating a trigger mechanism effects movement of the cannula for collection of the target tissue in the notch, and
- wherein the trigger mechanism is adapted to be actuated in a first way to adjust the amount of the notch which is exposed by the cannula prior to collection of the target tissue, and is adapted to be actuated in a second way to effect relative movement of the cannula and the stylet for collection of the target tissue in the notch.
4 more elements
A method of sampling tissue, comprising:
- providing a tissue sampling device having a stylet with a notch therein, the stylet being at least partially surrounded by a cannula;
- advancing an end of the stylet into a target tissue area so that a target tissue prolapses into the notch;
- actuating a trigger mechanism to move the cannula along the stylet to adjust an amount of the notch which is exposed by the cannula and therefore an amount of the target tissue to be sampled;
- releasing a locking mechanism to allow relative movement of the cannula and the stylet for collecting the target tissue in the notch;
- and
- effecting relative movement of the cannula and the stylet such that the cannula resects and collects the target tissue in the notch.
3 more elements
Dependencies are inferred from the claim text.