Minimally invasive deployable cutting instrument
First Claim
Patent Images
1. A cutting instrument, comprising:
- a handle assembly;
an actuating assembly extending distally from said handle assembly along a longitudinal axis;
a cutting system operably coupled to said actuating assembly, said cutting system including a pair of cutting members mounted in a mounting portion and movable with said actuating assembly from an undeployed position to a deployed position by displacing said cutting members distally along said longitudinal axis, said pair of cutting members each including at least one cutting blade for removing tissue material upon rotation about said longitudinal axis when in said deployed position, wherein in said undeployed position said cutting blades are recessed in said mounting portion and in said deployed position said cutting members are moved away from one another by said actuating system transversely to said longitudinal axis while maintaining a parallel relation between said at least one cutting blade of said cutting members, wherein each of said cutting members includes;
a body portion extending along a longitudinal axis between a proximal end and a distal end, wherein said distal end of said body portion includes a tapered nose;
said cutting blade extends along one side of said body portion between said proximal end and said distal end and includes a sharp edge extending along said longitudinal axis that faces away from the cutting blade of the other of said cutting members; and
said body portion includes a distal passage positioned closer to said distal end than said proximal end and oriented transversely to said longitudinal axis of said body portion and a proximal passage oriented transversely to said longitudinal axis of said body portion and further comprising pins extending through each of said proximal and distal passages to mount said body portion to said mounting portion.
1 Assignment
0 Petitions
Accused Products
Abstract
Instruments and methods for cutting tissue are disclosed. The instruments include one or more cutting members movable from a reduced profile undeployed position for insertion to the operative site to a deployed position where the cutting members can be manipulated to cut tissue material at the operative site.
73 Citations
36 Claims
-
1. A cutting instrument, comprising:
-
a handle assembly; an actuating assembly extending distally from said handle assembly along a longitudinal axis; a cutting system operably coupled to said actuating assembly, said cutting system including a pair of cutting members mounted in a mounting portion and movable with said actuating assembly from an undeployed position to a deployed position by displacing said cutting members distally along said longitudinal axis, said pair of cutting members each including at least one cutting blade for removing tissue material upon rotation about said longitudinal axis when in said deployed position, wherein in said undeployed position said cutting blades are recessed in said mounting portion and in said deployed position said cutting members are moved away from one another by said actuating system transversely to said longitudinal axis while maintaining a parallel relation between said at least one cutting blade of said cutting members, wherein each of said cutting members includes; a body portion extending along a longitudinal axis between a proximal end and a distal end, wherein said distal end of said body portion includes a tapered nose; said cutting blade extends along one side of said body portion between said proximal end and said distal end and includes a sharp edge extending along said longitudinal axis that faces away from the cutting blade of the other of said cutting members; and said body portion includes a distal passage positioned closer to said distal end than said proximal end and oriented transversely to said longitudinal axis of said body portion and a proximal passage oriented transversely to said longitudinal axis of said body portion and further comprising pins extending through each of said proximal and distal passages to mount said body portion to said mounting portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A cutting instrument, comprising:
-
a handle assembly; an actuating assembly extending distally from said handle assembly along a longitudinal axis; a cutting system operably coupled to said actuating assembly, said cutting system including a pair of cutting members mounted in a mounting portion and movable with said actuating assembly from an undeployed position to a deployed position by displacing said cutting members distally along said longitudinal axis, said pair of cutting members each including at least one cutting blade for removing tissue material upon rotation about said longitudinal axis when in said deployed position, wherein in said undeployed position said cutting blades are recessed in said mounting portion and in said deployed position said cutting members are moved away from one another by said actuating system transversely to said longitudinal axis while maintaining a parallel relation between said at least one cutting blade of said cutting members, wherein each of said cutting members includes; a body portion extending along a longitudinal axis between a proximal end and a distal end; and said body portion including a distal passage positioned closer to said distal end than said proximal end and oriented transversely to said longitudinal axis of said body portion and a proximal passage oriented transversely to said longitudinal axis of said body portion and further comprising pins extending through each of said proximal and distal passages to mount said body portion to said mounting portion. - View Dependent Claims (14, 15, 16, 17)
-
-
18. A cutting instrument, comprising:
-
a handle assembly; an actuating assembly extending distally from said handle assembly along a longitudinal axis, wherein said actuating assembly further includes a translation member in a receptacle defined by said coupling member, said actuating member being coupled to said translation member, said translation member being movable proximally and distally in said receptacle of said coupling member to move said actuating member proximally and distally in said bore of said mounting member and said handle assembly includes a sleeve having an inner threaded bore engaged with at least one threaded surface of said translation member, said sleeve being rotatable about said translation member to move said translation member axially between proximal and distal ends of said receptacle, wherein said mounting member includes a hub extending thereabout adjacent distal end of said sleeve, said hub defining a release member receptacle in communication with said bore; and a cutting system operably coupled to said actuating assembly, said cutting system including a pair of cutting members mounted in a mounting portion and movable with said actuating assembly from an undeployed position to a deployed position, said pair of cutting members each including at least one cutting blade for removing tissue material upon rotation about said longitudinal axis when in said deployed position, wherein in said undeployed position said cutting blades are recessed in said mounting portion and in said deployed position said cutting members are moved away from one another by said actuating system transversely to said longitudinal axis while maintaining a parallel relation between said at least one cutting blade of said cutting members, wherein said actuating assembly includes an elongate actuating member axially and movably received in a bore of an elongate mounting member, said mounting member including said mounting portion at a distal end thereof and a proximal coupling member, said bore extending through said coupling member. - View Dependent Claims (19, 20, 21)
-
-
22. A cutting instrument, comprising:
-
a handle assembly including a rotatable sleeve and a proximal handle; an actuating assembly extending distally from said handle assembly along a longitudinal axis, said actuating assembly including; a proximal coupling member defining a receptacle; a translation member non-rotatably received and axially moveable in said receptacle, said sleeve being positioned distally of said proximal handle and threadingly engaged and rotatable about said translation member to axially translate said translation member in said receptacle; an actuating member coupled to said translation member and axially movable therewith, wherein said actuating assembly includes a mounting member and said actuating member extends through a bore of said mounting member, said mounting member including said mounting portion at a distal end thereof and said coupling member at a proximal end thereof, said mounting member further including a hub extending thereabout distally of said coupling member, said hub defining a release member receptacle in communication with said bore; and a cutting system operably coupled with a distal end of said actuating member, said cutting system including a pair of cutting members mounted in a mounting portion and movable with said actuating assembly from an undeployed position to a deployed position, said pair of cutting members each including at least one cutting blade for removing tissue material upon rotation about said longitudinal axis when in said deployed position. - View Dependent Claims (23, 24, 25, 26, 27, 28)
-
-
29. A cutting instrument, comprising:
-
a handle assembly including a rotatable sleeve and a proximal handle; an actuating assembly extending distally from said handle assembly along a longitudinal axis, said actuating assembly including; a mounting member with a mounting portion at a distal end thereof and a hub at a proximal end thereof, said mounting member including a bore extending therethrough, wherein said hub defines a release member receptacle in communication with said bore of said mounting member; an actuating member extending through said bore and being coupled to said sleeve distally of said proximal handle, said actuating member being axially movable in said bore relative to said mounting member in response to rotation of said sleeve about said longitudinal axis; and a cutting system operably coupled at a distal end of said actuating member, said cutting system including a pair of cutting members mounted in said mounting portion and movable with said actuating assembly from an undeployed position to any one of a plurality of deployed positions, each of said deployed positions defining a height between cutting blades of said cutting members, said cutting blades operable to remove tissue material upon rotation about said longitudinal axis when in said deployed position, wherein one of said sleeve and said hub includes indicia indicating said height based upon a rotational position of said sleeve relative to said hub. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36)
-
Specification