Cannula that provides bi-directional fluid flow that is regulated by a single valve
0 Assignments
0 Petitions
Accused Products
Abstract
A cannula useful for endoscopic surgery. The cannula includes an outer tube in which an inner tube is removably seated. A surgical instrument can be positioned at the surgical site through the inner tube and irrigation fluid can be flowed to the surgical site through the inner tube. The tubes are spaced from each other to form a channel through which fluid can be selectively withdrawn from the surgical site. Fluid flow to and from the surgical site through the cannula is controlled by a valve assembly that has a single valve cock. The valve cock can be positioned to allow maximum irrigation flow/no suction flow or no irrigation flow/maximum suction flow. Bores internal to the valve cock are shaped so that, while the suction flow is initially incrementally increased, the irrigation flow is at a constant level.
188 Citations
82 Claims
-
1-27. -27. (Cancelled)
-
28. A cannula, said cannula comprising:
-
a first tube having opposed open proximal and distal ends;
a second tube, said second tube having;
a distal section that is disposed in said first tube, the distal section having an open distal end, the first tube and the distal section of said second tube being collectively dimensioned to define a first fluid conduit between said tubes; and
a proximal section integral with said distal section that is located outside of and extends away from the proximal end of said first tube, the proximal section having an open proximal end wherein, said second tube defines a second fluid conduit that extends through said second tube;
a first locking member moveably attached to one of said first tube or said second tube for engaging and releasably holding said second tube in said first tube; and
a valve assembly including;
a valve body attached to the proximal section of said second tube, said valve body having;
a first through hole that extends to and is in fluid communication with the first fluid conduit; and
a second through hole that extends to and is in fluid communication with the open proximal end of said second tube; and
a single valve member moveably mounted in said valve body so as to intersect the first through hole and the second through hole, said valve member having a plurality of bores positioned to selectively go in and out of registration with the first and second through holes so that movement of said valve member results in simultaneous regulation of fluid flow through both the first through hole and the second through hole. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
-
-
40. A cannula, said cannula comprising:
-
a first tube having opposed proximal and distal ends, the distal end being open, said first tube defining a first conduit;
a second tube adjacent said first tube, said second tube having a proximal end that is open and adjacent the proximal end of said first tube and a distal end opposite the proximal end that is open and adjacent the distal end of said first tube, said second tube defining a second conduit; and
a valve assembly, said valve assembly having;
a valve body that is attached to at least the proximal end of said second tube and that is shaped to have a first flow hole that extends to the first conduit and a second flow hole that extends to the second conduit; and
a single valve member moveably disposed in said valve body and positioned to intersect the first flow hole and the second flow hole, said valve member being formed with a first bore positioned to selectively be in registration with the first flow hole and a second bore positioned to selectively be in registration with the second flow hole so that said valve member simultaneously controls fluid flow through the first and second flow holes. - View Dependent Claims (41, 42, 43, 44, 45, 46, 47, 48)
-
-
49. A cannula, said cannula comprising:
-
an inner tube having a proximal end and a distal end spaced from and opposite the proximal end;
an elongated head assembly disposed over the proximal end of said inner tube, said head assembly having;
a proximal section that extends beyond the proximal end of said inner tube and at least one first aperture that opens into the proximal end of said inner tube;
a sleeve-shaped distal section that extends from the proximal section over a portion of said inner tube adjacent the proximal end of said inner tube, said inner tube and said head assembly distal section being shaped so as to be spaced apart from each other so as to define a first channel between said inner tube and said head assembly distal section and said head assembly distal section is further shaped to define at least one second aperture that extends to the first channel; and
a valve assembly mounted to said head assembly, said valve assembly having;
a valve body that is connected to said head assembly and a single valve member that is moveable relative to said valve body and configured to simultaneously regulate fluid flow through the at least one first aperture and the at least one second aperture of said head assembly; and
an outer tube attached to said head assembly distal section and that extends over a portion of said inner tube that extends distally from said head section, said inner tube and said outer tube being dimensioned so as to be spaced apart from each other so as to define a second channel that is contiguous with the first channel. - View Dependent Claims (50, 51, 52, 53, 54, 55, 56, 57, 58)
-
-
59. A surgical cannula arrangement comprising:
-
a first tube having spaced proximal and distal ends and defining a first fluid conduit therein;
a second tube disposed within said first tube and having spaced proximal and distal ends, said second tube defining a second fluid conduit therein; and
a valve assembly including a valve body positioned at said proximal ends of said first and second tubes and defining a first port in communication with said first fluid conduit and a second port in communication with said second fluid conduit, and a valve member movably disposed within said valve body, said valve member defining therein first and second bores respectively positioned on said valve member for selective communication with said first and second ports, said valve member having a first position relative to said valve body wherein said first bore is in communication with said first port to allow fluid flow through said first fluid conduit and said second bore is positioned in non-communication with said second port to prevent fluid flow through said second fluid conduit, said valve member having a second position relative to said valve body wherein said second bore is in communication with said second port to allow fluid flow through said second fluid conduit and said first bore is positioned in non-communication with said first port to prevent fluid flow through said first fluid conduit, and said valve member having an intermediate position between said first and second positions wherein said first and second bores are both in communication with the respective first and second ports to allow fluid flow through said first and second conduits simultaneously. - View Dependent Claims (60, 61, 62, 63, 64, 65, 66, 67)
-
-
68. A surgical cannula arrangement comprising:
-
a first tube having spaced proximal and distal ends and defining a first fluid conduit therein;
a second tube having spaced proximal and distal ends and defining a second fluid conduit therein; and
a valve assembly positioned adjacent said proximal ends of said first and second tubes, said valve assembly including a valve body defining therein a first port in communication with said first fluid conduit and a second port in communication with said second fluid conduit, and a valve member disposed within said valve body for movement relative thereto, said valve body defining an outer peripheral surface, a first bore positionable in communication with said first port to allow fluid flow within said first fluid conduit and a second bore positionable in communication with said second port to allow fluid flow through said second fluid conduit, said first and second bores opening through said outer peripheral surface of said valve body in partial circumferential overlapping relation with one another to permit simultaneous fluid flow through both said first and second fluid conduits. - View Dependent Claims (69, 70, 71, 72, 73)
-
-
74. A surgical cannula arrangement comprising:
-
an elongated outer tube having spaced proximal and distal ends and defining a longitudinal axis;
an elongated inner tube having spaced proximal and distal ends, said inner tube being disposed coaxially within said outer tube and therewith defining a first fluid conduit which extends between an outer surface of said inner tube and an inner surface of said outer tube, said inner tube further defining a second fluid conduit therein which is separated from said first fluid conduit by said inner tube; and
a valve assembly disposed at said proximal ends of said inner and outer tubes, said valve assembly including a valve body defining therein axially-spaced first and second ports which respectively communicate with said first and second fluid conduits, and a valve member disposed within said valve body for rotation relative thereto, said valve member defining therein first and second bores which are axially aligned with said first and second ports, said valve member being rotatable into a first position relative to said valve body wherein said first bore is in full communication with said first port to allow maximum fluid flow through said first fluid conduit and said second bore is out of communication with said second port to prevent fluid flow through said second fluid conduit, a second position relative to said valve body wherein said second bore is in full communication with said second port to allow maximum fluid flow though said second fluid conduit and said first bore is out of communication with said first port to prevent fluid flow through said first fluid conduit, and third position relative to said valve body wherein said first and second bores are both in communication with the respective first and second ports. - View Dependent Claims (75, 76, 77, 78)
-
-
79. A surgical cannula comprising:
-
a first tube having spaced proximal and distal ends and defining a first fluid conduit therein;
a second tube disposed within said first tube and having spaced proximal and distal ends, said second tube defining a second fluid conduit therein; and
a valve assembly including a valve body positioned at said proximal ends of said first and second tubes and defining a first port in communication with said first fluid conduit and a second port in communication with said second fluid conduit, and a valve member movably disposed within said valve body and defining therein first and second bores respectively positioned on said valve member for selective communication with said first and second ports, said valve member being movable relative to said valve body into a position wherein said first and second bores are respectively positioned in communication with said first and second ports to permit fluid flow within both said first and second fluid conduits simultaneously. - View Dependent Claims (80, 81, 82)
-
Specification