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1. (WO2013016698) DISCECTOMY DEVICES AND RELATED METHODS
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CLAIMS

What is claimed is:

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.