U.S. patent application number 13/070584 was filed with the patent office on 2011-09-29 for arthroscopic resection devices.
This patent application is currently assigned to Smith & Nephew, Inc.. Invention is credited to Brian J. Loreth.
Application Number | 20110238099 13/070584 |
Document ID | / |
Family ID | 44657266 |
Filed Date | 2011-09-29 |
United States Patent
Application |
20110238099 |
Kind Code |
A1 |
Loreth; Brian J. |
September 29, 2011 |
Arthroscopic Resection Devices
Abstract
The present disclosure relates to a resection device. The
resection device includes an outer tubular member; and an inner
tubular member disposed within the outer tubular member, the inner
tubular member including a burr having a body with flutes extending
along a length of the body, the flutes including parabolic wave
patterns located along surface edges of the flutes. In an
embodiment, the parabolic wave patterns extend along entire lengths
of the flutes. Other resection devices are also disclosed.
Inventors: |
Loreth; Brian J.;
(Braintree, MA) |
Assignee: |
Smith & Nephew, Inc.
Andover
MA
|
Family ID: |
44657266 |
Appl. No.: |
13/070584 |
Filed: |
March 24, 2011 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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61316860 |
Mar 24, 2010 |
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61443301 |
Feb 16, 2011 |
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Current U.S.
Class: |
606/170 |
Current CPC
Class: |
A61B 17/1662 20130101;
A61B 17/1615 20130101; A61B 17/1628 20130101; A61B 17/1631
20130101; A61B 17/1633 20130101; A61B 17/16 20130101; A61B 17/32002
20130101; A61B 2017/1602 20130101 |
Class at
Publication: |
606/170 |
International
Class: |
A61B 17/32 20060101
A61B017/32 |
Claims
1. A resection device comprising: an outer tubular member; and an
inner tubular member disposed within the outer tubular member, the
inner tubular member including a burr having a body with flutes
extending along a length of the body, the flutes including
parabolic wave patterns located along surface edges of the
flutes.
2. The resection device of claim 1 wherein the parabolic wave
patterns extend along entire lengths of the flutes.
3. A resection device comprising: an outer tubular member; and an
inner tubular member disposed within the outer tubular member, the
inner tubular member including a burr having a body with flutes
extending along a length of the body and a tip with flutes, wherein
the tip and the body include a different number of flutes.
4. The resection device of claim 3 wherein the body has a higher
number of flutes than the tip.
5. The resection device of claim 3 wherein the body has a lower
number of flutes than the tip.
6. The resection device of claim 3 wherein flutes on either the
body or the tip include parabolic wave patterns located along
surface edges of the flutes.
7. The resection device of claim 3 wherein the device further
includes a transition piece located between the inner tubular
member and the burr, the transition piece including a proximal
portion and a tapered distal portion.
8. The resection device of claim 1 wherein the device further
includes an opening located between the inner tubular member and
the burr.
9. The resection device of claim 8 wherein the opening leads to a
passageway, the passageway extending along a length of the inner
tubular member.
10. A resection device comprising: an outer tubular member; and an
inner tubular member disposed within the outer tubular member, the
inner tubular member including a burr having a body with flutes
extending along a length of the body and a tip with flutes, wherein
the tip and the body include a different number of flutes, the
flutes on either the body or the tip including parabolic wave
patterns located along surface edges of the flutes.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application claims priority to U.S. Patent Application
No. 61/316,860 and U.S. Patent Application No. 61/443,301, the
disclosures of which are incorporated herein in their
entireties.
BACKGROUND
[0002] 1. Field of Technology
[0003] The present disclosure relates to arthroscopic resection
devices for resection of tissue.
[0004] 2. Related Art
[0005] Arthroscopic resection devices have been used in performing
closed surgery, such as endoscopic surgery, i.e. arthroscopic
surgery. Generally, these devices include, without limitation,
blade devices and burr devices. Both the blade and burr devices
include an elongate outer tubular member terminating at a distal
end having an opening in the side wall and/or the end wall to form
a cutting port or window. Both devices also include an elongate
inner tubular member coaxially disposed in the outer tubular member
and having a distal end disposed adjacent the port/window in the
distal end of the outer tubular member. The distal end of the inner
tubular member of the blade device has a surface or edge for
engaging tissue via the port/window in the distal end of the outer
tubular member and in many cases cooperates with the port/window to
shear or cut tissue. Alternatively, the distal end of the inner
tubular member of the of the burr device has a burr having helical
grooved surfaces or flutes for drilling and grinding tissue via the
port/window in the distal end of the outer tubular member and in
many cases cooperates with the port/window to shear or cut tissue.
The inner tubular members are rotatably driven at their proximal
ends, normally via a hand piece having a small electric motor
therein controlled by finger-actuated switches on the hand piece. A
foot switch or switches on a console supply power to the hand
piece.
[0006] The helical flutes of the burr tend to not have any
additional distinguishing geometrical features designed to enhance
performance. They typically have smooth, non-serrated cutting edges
and follow the design of end mills or drills. Additionally, the
burrs tend to have the same number of flutes along the entire body
of the burr. The surfaces or edges of the blade device inner member
typically have straight cutting edges.
[0007] The characteristics of these cutting features result in a
less aggressive cutting action, thereby resecting the tissue or
bone into larger fragments that increase the chances of the device
becoming clogged, as well as cloud the image a surgeon has inside
the surgical area. Additionally, these characteristics increase the
possibility of the device displaying unpleasant harmonics or
resonance during use. Furthermore, having the same number of flutes
along the body of the burr allows for only one style of cutting,
thereby providing the burr device with less versatility. Therefore,
arthroscopic resection devices that alleviate these limitations are
needed.
SUMMARY
[0008] In an aspect, the present disclosure relates to a resection
device. The resection device includes an outer tubular member; and
an inner tubular member disposed within the outer tubular member,
the inner tubular member including a burr having a body with flutes
extending along a length of the body, the flutes including
parabolic wave patterns located along surface edges of the flutes.
In an embodiment, the parabolic wave patterns extend along entire
lengths of the flutes.
[0009] In another aspect, the present disclosure relates to a
resection device. The resection device includes an outer tubular
member; and an inner tubular member disposed within the outer
tubular member, the inner tubular member including a burr having a
body with flutes extending along a length of the body and a tip
with flutes, wherein the tip and the body include a different
number of flutes. In an embodiment, the body has a higher number of
flutes than the tip. In another embodiment, the body has a lower
number of flutes than the tip.
[0010] In yet another embodiment, the flutes on either the body or
the tip include parabolic wave patterns located along surface edges
of the flutes. In a further embodiment, the device further includes
a transition piece located between the inner tubular member and the
burr, the transition piece including a proximal portion and a
tapered distal portion. In yet a further embodiment, the device
further includes an opening located between the inner tubular
member and the burr. In an embodiment, the opening leads to a
passageway, the passageway extending along a length of the inner
tubular member.
[0011] In yet another aspect, the present disclosure relates to a
resection device. The resection device includes an outer tubular
member; and an inner tubular member disposed within the outer
tubular member, the inner tubular member including a burr having a
body with flutes extending along a length of the body and a tip
with flutes, wherein the tip and the body include a different
number of flutes, the flutes on either the body or the tip
including parabolic wave patterns located along surface edges of
the flutes.
[0012] Further areas of applicability of the present disclosure
will become apparent from the detailed description provided
hereinafter. It should be understood that the detailed description
and specific examples, while indicating the preferred embodiment of
the disclosure, are intended for purposes of illustration only and
are not intended to limit the scope of the disclosure.
BRIEF DESCRIPTION OF THE DRAWINGS
[0013] The accompanying drawings, which are incorporated in and
form a part of the specification, illustrate the embodiments of the
present disclosure and together with the written description serve
to explain the principles, characteristics, and features of the
disclosure. In the drawings:
[0014] FIG. 1 shows a first embodiment of an inner tubular member
of the present disclosure.
[0015] FIG. 2 shows a second embodiment of an inner tubular member
of the present disclosure.
[0016] FIG. 3 shows a third embodiment of an inner tubular member
of the present disclosure.
DETAILED DESCRIPTION OF THE EMBODIMENTS
[0017] The following description of the preferred embodiment(s) is
merely exemplary in nature and is in no way intended to limit the
disclosure, its application, or uses.
[0018] FIGS. 1-3 show inner tubular members for use with burr
devices and, specifically, the distal ends of the members. FIG. 1
shows an inner tubular member 10 including a burr 11 having a body
12 with helical flutes 13 extending along the length of the body
12. The surface edges 13a of the flutes 13 incorporate parabolic
wave patterns P along the entire lengths of the flutes 13. The burr
11 may have any number of flutes 13 and the flutes 13 may be
located at any angle relative to a longitudinal axis passing
through the burr 11. Additionally, the flutes 13 may incorporate a
pattern having an alternate geometry that may not be truly
parabolic, but has the cutting characteristics of the parabolic
wave pattern.
[0019] Located proximal to the burr 11 and between the inner
tubular member 10 and the burr 11 is an opening 14 to a passageway
15 extending the length of the inner tubular member 10. The
passageway 15 allows for the flow of fragmented tissue and bone
during surgery. A vacuum (not shown) is attached to a proximal end
(not shown) of the member 10 for vacuuming the tissue through the
passageway 15.
[0020] The parabolic wave patterns P on the flutes 13 provide the
burr 11 with a more aggressive cutting action, especially when used
in cutting bone, which causes the burr 11 to cut the bone into
smaller fragments. Having smaller bone fragments allows the
fragments to be removed more readily by the vacuum, thereby
reducing the possibility of clogging and obscuring the visual image
of the surgical area. Additionally, the parabolic wave pattern P
deliberately creates inconsistencies in the burr geometry, thereby
lessening any unpleasant harmonics or resonance of the burr device.
This lessening, coupled with the fact the pattern P yields constant
acceleration, provides the device with smoother cutting performance
and controllability.
[0021] FIG. 2 shows another inner tubular member 20 including a
burr 21 having a body 22 with helical flutes 23 extending along the
length of the body 22 and a tip 24 also having helical flutes 25.
The tip 24 has a lower number of flutes 25 than the body 22. Having
a lower number of flutes 25 on the tip 24 makes the tip 24 cut more
aggressively than the body 22 because the individual cutting area
of each flute 25 is more. FIG. 3 shows yet another inner tubular
member 30 including a burr 31 having a body 32 with helical flutes
33 extending along the length of the body 32 and a tip 34 with
helical flutes 35. Unlike member 20, the tip 34 of burr 31 has a
higher number of flutes 35 than the body 32. Having a higher number
of flutes 35 on the tip 34 makes the tip 34 cut less aggressively
than the body 32 because the individual cutting area of each flute
35 is less.
[0022] Having a transitional fluted burr with a different number of
flutes on the tip than on the body provides more versatility to the
user. The ability to perform different cutting techniques with one
burr is more efficient than using two different devices.
Additionally, it is more cost effective to use this type of burr
due to only one burr having to be inventoried and utilized.
[0023] Any different number combination of flutes may be used on
the burrs 21,31 and the flutes 23,25,33,35 may be located at any
angle relative to a longitudinal axis passing through the burr
21,31. Additionally, it is within the scope of this disclosure to
have parabolic wave patterns along the lengths of any of the flutes
23,25,33.35, similar to the wave patterns P on flutes 13. The
patterns may be located on the surface edges of the flutes
23,25,33,35 and along the entire length or along a partial length
of the flutes 23,25,33,35. Furthermore, it is within the scope of
this disclosure to have an alternating number of flutes having the
wave patterns. Even further, the flutes 23,25,33,35 may incorporate
a pattern having an alternate geometry that may not be truly
parabolic, but has the cutting characteristics of the parabolic
wave pattern.
[0024] Both burrs 21,31 are coupled to transition pieces 26,36
located between the inner tubular members 20,30 and the burrs
21,31. The transition pieces 26,36 include proximal portions 27,37
and tapered distal portions 28,38. In use, all of the members
10,20,30 would be disposed within an outer tubular member, as
discussed above.
[0025] The inner tubular members 10,20,30 and their components are
made from metal material. However, other material strong enough to
withstand the forces of a tissue cutting action may be used. The
flutes, parabolic wave patterns on the flutes, and opening are made
via a machining process or other process known to those of skill in
the art.
[0026] As various modifications could be made to the exemplary
embodiments, as described above with reference to the corresponding
illustrations, without departing from the scope of the disclosure,
it is intended that all matter contained in the foregoing
description and shown in the accompanying drawings shall be
interpreted as illustrative rather than limiting. Thus, the breadth
and scope of the present disclosure should not be limited by any of
the above-described exemplary embodiments, but should be defined
only in accordance with the following claims appended hereto and
their equivalents.
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