Methods and devices for removing tissue from a patient
View Patent ↗The present invention is directed to tissue removal devices and methods. A tubular element having an open distal end is advanced into tissue so that tissue enters the tubular element. The tissue, which entered the tubular element is cut to separate the tissue from the surrounding tissue. The tissue is then transported proximally by the cutting element or a separate transport element.
1. A method of removing tissue from a patient, comprising the steps of:
providing a tissue removing device including a tubular element having an open end, the tubular element having a longitudinal axis defining a longitudinal direction, the tissue removing device also having a cutting element movable within the tubular element;
introducing the tubular element into a patient;
advancing the tubular element in a longitudinal direction so that tissue enters the open end;
moving the cutting element to form a cut which separates the tissue which entered the open end to form a first tissue mass, the cutting element having a plastically deformable portion, the plastically deformable portion undergoing plastic deformation when moving to a cutting position;
transporting the first tissue mass away from the open end using the cutting element; and
repeating the advancing, moving and transporting steps to collect a second tissue mass from the patient using the plastically deformable portion used to collect the first tissue mass, wherein an introducer remains proximal to the distal end of the open end until a first actuator is actuated.
2. The method of claim 1 , wherein:
the advancing, moving and transporting steps are carried out without removing the open end of the tubular element from the patient.
3. The method of claim 1 , wherein:
the providing step is carried out with the cutting element having a first part and a second part which move toward one another during the moving step; and
the moving step is carried out with the first and second parts slidingly engaging an inner wall of the tubular element, wherein the sliding engagement between each of the first and second parts and the inner wall of the tubular element directs the first and second parts inward and plastically deforms the plastically deformable portion.
4. The method of claim 3 , wherein:
the advancing step is carried out with the tubular element rotating while advancing.
5. The method of claim 1 , wherein:
the providing step is carried out with the tissue removing device having the introducer positioned within the tubular element during the introducing step.
6. The method of claim 1 , wherein:
the providing step is carried out with the tissue removal device having the first actuator and a second actuator;
the retracting step being carried out when the user actuates the first actuator; and
the advancing step being carried out when the user actuates the second actuator.
7. The method of claim 6 , further comprising the step of:
actuating the first actuator after the advancing step, wherein the introducer is moved distally so that the introducer extends beyond the open end of the tubular element.
8. The method of claim 1 , wherein:
the providing step is carried out with the introducer having a sharp tip which extends beyond the open end of the tubular element during the introducing step.
9. The method of claim 8 , wherein:
the providing step is carried out with the tissue removal device having a tissue chamber; and
the transporting step is carried out with the first tissue mass entering the tissue chamber after contacting the introducer.
10. The method of claim 1 , wherein:
the cutting step is carried out by rotating at least one of the cutting element, transport element and cutting element.
11. The method of claim 10 , wherein:
the advancing step is carried out with the tubular element rotating while being advanced.