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US 8,298,254 B2Granted
Devices and methods for cutting and evacuating tissue
AssigneeLaurimed, LLC
InventorsBrian R. Dubois, James T. Nielsen, Alexander Gordon
Life of this patent
Estimating the term…
Abstract
Various medical devices and methods for cutting and/or evacuating tissue are provided. The devices and methods may utilize a reciprocating mechanism or motor powered by suction from a vacuum source. The medical devices and methods may be used on tissue in various regions of a patient's body and for treating various conditions, e.g., for performing a polypectomy or discectomy.
Claims46
A vacuum powered tissue cutting device comprising:
- an elongate shaft having a proximal end, a distal end and a lumen defined therein, wherein the distal end has an opening for receiving tissue;
- a cutter positioned within the elongate shaft, wherein the cutter is configured to be reciprocated to cut tissue;
- a chamber coupled to the proximal end of the elongate shaft such that the elongate shaft remains fixed relative to the chamber, the chamber having a mechanism positioned therein, wherein the mechanism is powered by suction created by a vacuum source such that the mechanism produces a reciprocating motion which causes the cutter to reciprocate;
- and wherein the mechanism comprises a piston and a valve, wherein the suction is applied to both sides of the piston in an alternating manner to cause the piston to reciprocate which causes the cutter to reciprocate, wherein the piston is coupled to the valve by a linkage mechanism that translates motion from the piston to the valve.
1 more element
A vacuum powered tissue cutting device comprising:
- an elongate shaft having a proximal end, a distal end and a lumen defined therein, wherein the distal end has an opening for receiving tissue;
- a cutter positioned within the elongate shaft, wherein the cutter is configured to be reciprocated past the opening in the elongate shaft to cut tissue in the opening;
- a chamber coupled to the proximal end of the elongate shaft, the chamber having a cutter driver assembly positioned therein, wherein the cutter driver assembly comprises a piston and a valve and is powered by suction created by a vacuum source such that the cutter driver assembly produces a reciprocating motion which causes the cutter to reciprocate, wherein the suction is applied to both sides of the piston in an alternating manner to cause the piston to produce the reciprocating motion, wherein the piston is coupled to the valve by a linkage mechanism that translates motion from the piston to the valve.
A method of cutting and removing tissue from a subject comprising:
- advancing a cutting device next to a target tissue in the subject, the cutting device having an elongate shaft and a cutter positioned within the elongate shaft;
- powering the cutting device using suction created by a vacuum source such that the cutting device produces a reciprocating motion which causes the cutter to reciprocate;
- cutting tissue with the reciprocating cutter;
- and
- evacuating the cut tissue using the suction created by the vacuum source;
- and wherein the vacuum powered cutting device comprises a piston and a valve, wherein the suction is applied to both sides of the piston in an alternating manner to cause reciprocating motion and wherein the piston is coupled to the valve by a linkage mechanism that translates motion from the piston to the valve.
3 more elements
A method for performing a polypectomy comprising:
- advancing a cutting device next to a polyp in a subject;
- powering the cutting device using suction created by a vacuum source such that the cutting device produces a reciprocating motion which causes the cutter to reciprocate or rotate;
- and
- cutting the polyp with the reciprocating or rotating cutter;
- and wherein the vacuum powered cutting device comprises a piston and a valve, wherein the suction is applied to both sides of the piston in an alternating manner to cause the reciprocating motion and wherein the piston is coupled to the valve by a linkage mechanism that translates motion from the piston to the valve.
2 more elements
A method for performing a discectomy comprising:
- advancing a cutting device into a disc in a spine of a subject;
- powering the cutting device using suction created by a vacuum source such that the cutting device produces a reciprocating motion which causes the cutter to reciprocate or rotate;
- and
- cutting a nucleus of the disc with the reciprocating or rotating cutter;
- and wherein the vacuum powered cutting device comprises a piston and a valve, wherein the suction is applied to both sides of the piston in an alternating manner to cause the reciprocating motion and wherein the piston is coupled to the valve by a linkage mechanism that translates motion from the piston to the valve.
2 more elements
Dependencies are inferred from the claim text.