DISCECTOMY DEVICES AND RELATED METHODS
Tissue removal devices are disclosed herein. In some embodiments, a tissue removal device may comprise a handheld housing, a motor, and a tissue removal mechanism coupled to the handheld housing. The tissue removal mechanism may comprise a tubular member, a rotatable elongated member disposed within a lumen of the tubular member, a first impeller distal to the rotatable elongated member, and a second impeller adjacent the first impeller.
1 . A tissue removal device comprising:
a handheld housing;
a motor; and
a tissue removal mechanism coupled to the handheld housing, the tissue removal mechanism comprising:
a tubular member;
a rotatable elongated member disposed within a lumen of the tubular member;
a first impeller distal to the rotatable elongated member; and
a second impeller adjacent the first impeller.
2 . The tissue removal device of claim 1 , wherein the second impeller is configured to counter-rotate with respect to the first impeller.
3 . The tissue removal device of claim 1 , wherein rotation of the rotatable elongated member effects rotation of the first impeller.
4 . The tissue removal device of claim 3 , wherein rotation of the first impeller effects rotation of the second impeller.
5 . The tissue removal device of claim 3 , further comprising a helical member disposed around at least a portion of the rotatable elongated member.
6 . The tissue removal device of claim 5 , wherein rotation of the rotatable elongated member also effects rotation of the helical member.
7 . The tissue removal device of claim 1 , further comprising an impeller housing, wherein the first and second impellers are disposed within the impeller housing.
8 . The tissue removal device of claim 7 , wherein the impeller housing comprises a side wall portion including a first aperture therethrough.
9 . The tissue removal device of claim 8 , wherein the side wall portion further includes a second aperture therethrough.
10 . The tissue removal device of claim 9 , wherein the first and second apertures are configured to expose the first and second impellers to tissue during use.
11 . The tissue removal device of claim 9 , wherein at least one of the first and second apertures defines a cutting edge.
12 . The tissue removal device of claim 11 , wherein the cutting edge has a serrated configuration.
13 . The tissue removal device of claim 7 , further comprising a sheath disposed within the impeller housing, wherein the first and second impellers are disposed within the sheath.
14 . The tissue removal device of claim 1 , further comprising a tissue collection chamber coupled to a distal portion of the handheld housing.
15 . A tissue removal device comprising:
a handheld housing;
a motor; and
a tissue removal mechanism coupled to the handheld housing, the tissue removal mechanism comprising:
a tubular member;
a rotatable elongated member disposed within a lumen of the tubular member;
an impeller housing coupled to a distal end of the tubular member; and
an impeller disposed within the impeller housing and coupled to the rotatable elongated member,
wherein the impeller housing comprises a side wall portion having first and second apertures therethrough, and wherein the first and second apertures are configured to expose the impeller to tissue during use.
16 . The tissue removal device of claim 15 , wherein at least one of the first and second apertures defines a cutting edge.
17 . The tissue removal device of claim 16 , wherein the cutting edge has a serrated configuration.
18 . The tissue removal device of claim 15 , wherein the first aperture is opposite the second aperture along a circumference of the impeller housing.