US5234455A — Lipped cannula and methods of introducing surgica…

Claim 1

Independent Claim 154 words

A cannula for introducing surgical instruments in the body through a portal of minimal size formed in a wall of anatomical tissue including an elongate member having a distal end to be inserted through the portal into the body, a proximal end and a cross-sectional configuration having a periphery; a housing mounting said proximal end of said cylindrical member to be disposed externally of the body; a lumen through said cylindrical member and said housing providing a passage for receiving surgical instruments to be introduced in the body; and a lip on said elongate member proximally spaced from said distal end and having a periphery immovably spaced outwardly from said periphery of said elongate member to be disposed within the body, said lip including a substantially planar surface for engaging the wall of the body with said distal end inserted in the body to prevent backing out of said distal end from the body.

Claim 2

Dependent Claim 154 words

A cannula for introducing surgical instruments in the body through a portal of minimal size formed in a wall of anatomical tissue including an elongate member having a distal end to be inserted through the portal into the body, a proximal end and a cross-sectional configuration having a periphery; a housing mounting said proximal end of said cylindrical member to be disposed externally of the body; a lumen through said cylindrical member and said housing providing a passage for receiving surgical instruments to be introduced in the body; and a lip on said elongate member proximally spaced from said distal end and having a periphery immovably spaced outwardly from said periphery of said elongate member to be disposed within the body, said lip including a substantially planar surface for engaging the wall of the body with said distal end inserted in the body to prevent backing out of said distal end from the body.

Claim 3

Dependent Claim 22 words

A cannula as recited in claim 1 wherein said periphery of said elongate member is disposed within said periphery of said lip.

Claim 4

Dependent Claim 33 words

A cannula as recited in claim 2 wherein said lip is defined by a protrusion on the elongate member, said protrusion tapering in a distal direction from said surface to said distal end.

Claim 5

Dependent Claim 188 words

A cannula for introducing surgical instruments in the body through a portal of minimal size formed in a wall of anatomical tissue including an elongate member having a longitudinal axis, a distal end to be inserted through the portal into the body, a proximal end and a cross-sectional configuration having a periphery; a housing mounting said proximal end of said cylindrical member to be disposed externally of the body; a lumen through said cylindrical member and said housing providing a passage for receiving surgical instruments to be introduced in the body; and a lip defined by a protrusion on said elongate member proximally spaced from said distal end, said protrusion tapering in a distal direction from said lip to said distal end and having a periphery spaced outwardly from said periphery of said elongate member to be disposed within the body, said elongate member periphery being disposed within said lip periphery, said lip including a surface substantially perpendicular to said longitudinal axis for engaging the wall of the body with said distal end inserted in the body to prevent backing out of said distal end from the body.

Claim 6

Dependent Claim 188 words

A cannula for introducing surgical instruments in the body through a portal of minimal size formed in a wall of anatomical tissue including an elongate member having a longitudinal axis, a distal end to be inserted through the portal into the body, a proximal end and a cross-sectional configuration having a periphery; a housing mounting said proximal end of said cylindrical member to be disposed externally of the body; a lumen through said cylindrical member and said housing providing a passage for receiving surgical instruments to be introduced in the body; and a lip defined by a protrusion on said elongate member proximally spaced from said distal end, said protrusion tapering in a distal direction from said lip to said distal end and having a periphery spaced outwardly from said periphery of said elongate member to be disposed within the body, said elongate member periphery being disposed within said lip periphery, said lip including a surface substantially perpendicular to said longitudinal axis for engaging the wall of the body with said distal end inserted in the body to prevent backing out of said distal end from the body.

Claim 7

Dependent Claim 26 words

A cannula as recited in claim 4 wherein said lumen is substantially circular in cross-section and has a diameter for receiving various sizes of surgical instruments.

Claim 8

Dependent Claim 31 words

A cannula as recited in claim 5 further including a valve assembly mounted in said lumen within said housing and having means allowing passage therethrough of surgical instruments of various sizes.

Claim 9

Dependent Claim 38 words

A cannula as recited in claim 6 wherein said housing includes a forward section mounting said elongate member and a rearward section terminating at a rearward end and wherein said valve assembly is disposed in said rearward section.

Claim 10

Dependent Claim 42 words

A cannula as recited in claim 7 wherein said lumen includes a passage in said rearward section and a cavity in said forward section communicating with said passage and further including an annular ledge within said cavity for mounting said valve assembly.

Claim 11

Dependent Claim 29 words

A cannula as recited in claim 8 further including a cap mounted on said housing at said rearward end and having an aperture allowing passage therethrough of surgical instruments.

Claim 12

Dependent Claim 137 words

A cannula for introducing surgical instruments in the body through anatomical tissue of a wall of the body including a tubular member having a distal end to be inserted through the wall of the body, a proximal end and a circumference; a housing mounting said proximal end of said cylindrical member to be disposed externally of the body; a lumen in said tubular member and said housing for receiving surgical instruments to be introduced in the body; and a lip on said tubular member including a substantially flat surface spaced proximally of said distal end and having a periphery rigidly spaced outwardly of said circumference for being inserted through the wall of the body to engage the wall with said distal end disposed in the body to prevent backing out of said distal end from the wall.

Claim 13

Dependent Claim 137 words

A cannula for introducing surgical instruments in the body through anatomical tissue of a wall of the body including a tubular member having a distal end to be inserted through the wall of the body, a proximal end and a circumference; a housing mounting said proximal end of said cylindrical member to be disposed externally of the body; a lumen in said tubular member and said housing for receiving surgical instruments to be introduced in the body; and a lip on said tubular member including a substantially flat surface spaced proximally of said distal end and having a periphery rigidly spaced outwardly of said circumference for being inserted through the wall of the body to engage the wall with said distal end disposed in the body to prevent backing out of said distal end from the wall.

Claim 14

Dependent Claim 14 words

A cannula as recited in claim 10 wherein said periphery is annular in configuration.

Claim 15

Dependent Claim 23 words

A cannula as recited in claim 11 wherein said circumference of said tubular member id disposed concentrically with said periphery of said surface.

Claim 16

Dependent Claim 25 words

A cannula as recited in claim 12 wherein the wall of the body includes an internal surface and said lip surface engages the internal surface.

Claim 17

Dependent Claim 21 words

A cannula as recited in claim 13 wherein the lip surface is spaced proximally from said distal end a minimal distance.

Claim 18

Dependent Claim 34 words

A cannula as recited in claim 14 further including a protrusion joining said lip surface to said tubular member, said protrusion tapering in a distal direction from said lip surface to said distal end.

Claim 19

Dependent Claim 197 words

A cannula for introducing surgical instruments in the body through anatomical tissue of a wall of the body having an internal surface including a tubular member having a distal end to be inserted through the wall of the body, a proximal end and a circumference; a housing mounting said proximal end of the cylindrical member to be disposed externally of the body; a lumen in said tubular member and said housing for receiving surgical instruments to be introduced in the body; an annular lip on said tubular member including a wall engaging surface spaced proximally of said distal end a minimal distance, said lip having a periphery, said circumference being disposed concentrically with said periphery, said periphery being spaced outwardly of said circumference for being inserted through the wall of the body to position said wall engaging surface in engagement with the internal surface of the wall with said distal end disposed in the body to prevent backing out of said distal end from the wall; and a tapered surface having a truncated conical configuration joining said lip to said tubular member, said tapered surface tapering in a distal direction from said lip to said distal end.

Claim 20

Dependent Claim 197 words

A cannula for introducing surgical instruments in the body through anatomical tissue of a wall of the body having an internal surface including a tubular member having a distal end to be inserted through the wall of the body, a proximal end and a circumference; a housing mounting said proximal end of the cylindrical member to be disposed externally of the body; a lumen in said tubular member and said housing for receiving surgical instruments to be introduced in the body; an annular lip on said tubular member including a wall engaging surface spaced proximally of said distal end a minimal distance, said lip having a periphery, said circumference being disposed concentrically with said periphery, said periphery being spaced outwardly of said circumference for being inserted through the wall of the body to position said wall engaging surface in engagement with the internal surface of the wall with said distal end disposed in the body to prevent backing out of said distal end from the wall; and a tapered surface having a truncated conical configuration joining said lip to said tubular member, said tapered surface tapering in a distal direction from said lip to said distal end.

Claim 21

Independent Claim 114 words

A method of introducing a surgical instrument at an operative site in the body in endoscopic procedures including the steps of forming a portal of minimal size in tissue of a wall of the body adjacent the operative site; visualizing the operative site endoscopically; inserting a lip on an end of a cannula into the body through the portal with a periphery of the lip rigidly disposed outwardly of a periphery of the cannula; positioning a substantially planar surface of the lip against an internal surface of the wall to prevent backing out of the cannula from the body; and introducing a surgical instrument at the operative site through a lumen of the cannula.

Claim 22

Independent Claim 114 words

A method of introducing a surgical instrument at an operative site in the body in endoscopic procedures including the steps of forming a portal of minimal size in tissue of a wall of the body adjacent the operative site; visualizing the operative site endoscopically; inserting a lip on an end of a cannula into the body through the portal with a periphery of the lip rigidly disposed outwardly of a periphery of the cannula; positioning a substantially planar surface of the lip against an internal surface of the wall to prevent backing out of the cannula from the body; and introducing a surgical instrument at the operative site through a lumen of the cannula.

Claim 23

Dependent Claim 32 words

A method of introducing a surgical instrument as recited in claim 17 wherein said step of forming a portal includes forming the portal to be just large enough to receive the cannula.

Claim 24

Dependent Claim 33 words

A method of introducing a surgical instrument as recited in claim 18 wherein said step of inserting includes inserting the end of the cannula to protrude from the internal surface a minimal distance.

Claim 25

Dependent Claim 32 words

A method of introducing a surgical instrument as recited in claim 19 wherein said step of introducing includes introducing the surgical instrument through a valve assembly in the lumen of the cannula.

Claim 26

Dependent Claim 41 words

A method of introducing a surgical instrument as recited in claim 20 wherein said step of introducing includes, prior to introducing the surgical instrument through the valve assembly, the step of inserting the surgical instrument through a cap on the cannula.

Claim 27

Independent Claim 83 words

A method of introducing a surgical instrument at the knee in arthroscopic procedures including the steps of forming a portal of minimal size in tissue adjacent the knee; visualizing the knee with an arthroscope; inserting an end of a cannula through the portal; positioning a lip on the end of the cannula against an internal surface of the tissue to prevent backing out of the cannula from the tissue; and introducing a surgical instrument at the knee through a lumen of the cannula.

Claim 28

Independent Claim 83 words

A method of introducing a surgical instrument at the knee in arthroscopic procedures including the steps of forming a portal of minimal size in tissue adjacent the knee; visualizing the knee with an arthroscope; inserting an end of a cannula through the portal; positioning a lip on the end of the cannula against an internal surface of the tissue to prevent backing out of the cannula from the tissue; and introducing a surgical instrument at the knee through a lumen of the cannula.

Claim 29

Dependent Claim 27 words

A method of introducing a surgical instrument at the knee as recited in claim 22 wherein said step of forming a portal includes forming a posteromedial portal.

Claim 30

Dependent Claim 27 words

A method of introducing a surgical instrument at the knee as recited in claim 22 wherein said step of forming a portal includes forming a posterolateral portal.

Claim 31

Independent Claim 105 words

A method of preventing extravasation when introducing a surgical instrument at an operative site in the body through a portal of minimal size in endoscopic procedures including the steps of forming a portal of minimal size through tissue forming a wall of the body adjacent the operative site; visualizing the operative site endoscopically; inserting an end of a cannula into the body through the portal; positioning an annular, substantially planar lip on the end of the cannula disposed within the body in engagement with an internal surface of the wall; and introducing a surgical instrument at the operative site through a lumen of the cannula.

Claim 32

Independent Claim 105 words

A method of preventing extravasation when introducing a surgical instrument at an operative site in the body through a portal of minimal size in endoscopic procedures including the steps of forming a portal of minimal size through tissue forming a wall of the body adjacent the operative site; visualizing the operative site endoscopically; inserting an end of a cannula into the body through the portal; positioning an annular, substantially planar lip on the end of the cannula disposed within the body in engagement with an internal surface of the wall; and introducing a surgical instrument at the operative site through a lumen of the cannula.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1996-08-09	1997-02-08	1997-08-10	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2000-08-09	2001-02-08	2001-08-10	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2004-08-09	2005-02-08	2005-08-10	$7700.00	Window Closed / Lapsed

Lipped cannula and methods of introducing surgical instruments in arthroscopic surgical procedures

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