US5330501A — Tissue gripping device for use with a cannula and…

Claim 1

Independent Claim 257 words

A tissue gripping device for use with a cannula, said device comprising: a housing member having a generally cylindrical shape including a central passageway, said housing member having flange means at a proximal end for positioning outside a patient's body and an opening at a distal end for positioning within said patient's body, said housing member having a plurality of longitudinally directed slots, said flange means including an internal threaded portion; a collet having a generally cylindrical shape including a central passageway aligned with said central passageway of said housing member, said collet having an external threaded portion adapted to cooperate with said threaded portion of said housing member, said collet further having means for engaging a cannula extending distally into said central passageway of said housing member when said collet is positioned thereon; and a tissue gripping member having a generally cylindrical shape including a plurality of flexible finger-like expansion members extending distally from a flange at a proximal end thereof, said members corresponding in number to said slots in said housing member, said members forming a cylinder having a first diameter such that said expansion members are positioned within said housing member; wherein said tissue gripping member passes through said collet into said housing member so that said finger-like expansion members align with said slots, such that advancing said gripping member distally into said housing member causes a distal end of said expansion members to contact a distal end of said slots to cam said members outwardly through said slots to engage tissue of patient.

Claim 2

Dependent Claim 257 words

A tissue gripping device for use with a cannula, said device comprising: a housing member having a generally cylindrical shape including a central passageway, said housing member having flange means at a proximal end for positioning outside a patient's body and an opening at a distal end for positioning within said patient's body, said housing member having a plurality of longitudinally directed slots, said flange means including an internal threaded portion; a collet having a generally cylindrical shape including a central passageway aligned with said central passageway of said housing member, said collet having an external threaded portion adapted to cooperate with said threaded portion of said housing member, said collet further having means for engaging a cannula extending distally into said central passageway of said housing member when said collet is positioned thereon; and a tissue gripping member having a generally cylindrical shape including a plurality of flexible finger-like expansion members extending distally from a flange at a proximal end thereof, said members corresponding in number to said slots in said housing member, said members forming a cylinder having a first diameter such that said expansion members are positioned within said housing member; wherein said tissue gripping member passes through said collet into said housing member so that said finger-like expansion members align with said slots, such that advancing said gripping member distally into said housing member causes a distal end of said expansion members to contact a distal end of said slots to cam said members outwardly through said slots to engage tissue of patient.

Claim 3

Dependent Claim 31 words

A tissue gripping device according to claim 1, wherein said housing member tapers at said distal end to provide a truncated conical shape to said housing member at said distal end.

Claim 4

Dependent Claim 24 words

A tissue gripping device according to claim 2, wherein said slots in said housing member terminate adjacent said taper portion near said distal end.

Claim 5

Dependent Claim 48 words

A tissue gripping device according to claim 1, wherein said means for engaging a cannula comprises a plurality of gripping tabs on said collet having an inwardly directed face which has an arcuate shape corresponding to the shape of a cannula to facilitate gripping said cannula upon tightening.

Claim 6

Dependent Claim 28 words

A tissue gripping device according to claim 4, wherein said gripping tabs form a diameter which decreases as said collet is tightened by rotation into said housing member.

Claim 7

Dependent Claim 23 words

A tissue gripping device according to claim 1, wherein said collet has a gripping flange at a proximal end thereof to facilitate tightening.

Claim 8

Dependent Claim 24 words

A tissue gripping device according to claim 1, wherein said collet includes at least three gripping tabs, said tabs spaced equidistant from each other.

Claim 9

Dependent Claim 24 words

A tissue gripping device according to claim 1, wherein said tissue gripping member includes at least three expansion members spaced equidistant from each other.

Claim 10

Dependent Claim 20 words

A tissue gripping device according to claim 8, wherein said tissue gripping member includes no more than six expansion members.

Claim 11

Dependent Claim 26 words

A tissue gripping device according to claim 1, wherein said flange of said tissue gripping member comprising a gripping portion for grasping and moving said member.

Claim 12

Dependent Claim 53 words

A tissue gripping device according to claim 1, wherein said expansion members of said tissue gripping member are provided with an outwardly curving portion at said distal end, said curving portion comprising a camming surface to engage said distal end of said slots to cam said expansion members outwardly to engage said tissue.

Claim 13

Dependent Claim 35 words

A tissue gripping device according to claim 11, wherein said expansion members terminate in an outwardly facing tissue contacting surface, said surface being generally in the same plane as a longitudinal axis of said device.

Claim 14

Dependent Claim 30 words

A tissue gripping device according to claim 1, wherein said expansion members cam outwardly at an angle of between 10° and 25° relative to a longitudinal axis of said device.

Claim 15

Dependent Claim 26 words

A tissue gripping device according to claim 13, wherein said expansion members cam outwardly at an angle between 15° and 20° relative to said longitudinal axis.

Claim 16

Dependent Claim 32 words

A tissue gripping device according to claim 1, wherein expansion members engage said tissue at a force sufficient to withstand at least a 25 lb. pull force before disengaging from said tissue.

Claim 17

Dependent Claim 316 words

A tissue gripping device for use with a cannula, said device comprising: a tubular housing member having a distal opening and a proximal opening, said housing having a plurality of slots extending axially and spaced equidistant from each other about the circumference of said tubular housing; a cannula gripping collar positioned adjacent said proximal opening of said tubular housing member, said collar including a plurality of cannula gripping fingers extending into said tubular housing member, said collar having a central opening; a threaded locking collet engaging threads at said proximal opening of said tubular housing member for locking said collar and said housing member to said cannula upon rotation of said collet, said collet having a central opening; a tissue gripping member having a generally tubular shape including a plurality of flexible finger-like expansion members extending from a proximal knob-like member, said expansion members terminating at a distal end in tissue contacting surfaces which taper into camming surfaces, said plurality of expansion members corresponding in number to said slots in said housing member and being dimensioned to have a width slightly less than a width of said slots so as to flex through said slots, said gripping member having a central opening at said knob-like member slightly greater than a diameter of said cannula, and an outer diameter slightly less than the diameter of said housing member; wherein said tissue gripping member is movable from an at rest position where said expansion members are located within said housing member, to a gripping position where said tissue gripping member is advanced towards said distal end of said housing so that said camming surfaces contact said housing member at an end of each slot to expand the diameter of said expansion members by forcing said expansion members through said slots so that said tissue contacting surfaces engage tissue to anchor said device, and said cannula, in said tissue.

Claim 18

Dependent Claim 316 words

A tissue gripping device for use with a cannula, said device comprising: a tubular housing member having a distal opening and a proximal opening, said housing having a plurality of slots extending axially and spaced equidistant from each other about the circumference of said tubular housing; a cannula gripping collar positioned adjacent said proximal opening of said tubular housing member, said collar including a plurality of cannula gripping fingers extending into said tubular housing member, said collar having a central opening; a threaded locking collet engaging threads at said proximal opening of said tubular housing member for locking said collar and said housing member to said cannula upon rotation of said collet, said collet having a central opening; a tissue gripping member having a generally tubular shape including a plurality of flexible finger-like expansion members extending from a proximal knob-like member, said expansion members terminating at a distal end in tissue contacting surfaces which taper into camming surfaces, said plurality of expansion members corresponding in number to said slots in said housing member and being dimensioned to have a width slightly less than a width of said slots so as to flex through said slots, said gripping member having a central opening at said knob-like member slightly greater than a diameter of said cannula, and an outer diameter slightly less than the diameter of said housing member; wherein said tissue gripping member is movable from an at rest position where said expansion members are located within said housing member, to a gripping position where said tissue gripping member is advanced towards said distal end of said housing so that said camming surfaces contact said housing member at an end of each slot to expand the diameter of said expansion members by forcing said expansion members through said slots so that said tissue contacting surfaces engage tissue to anchor said device, and said cannula, in said tissue.

Claim 19

Dependent Claim 29 words

A tissue gripping device according to claim 16, wherein said housing member is tapered at its distal end to terminate in a truncated conical portion at said distal end.

Claim 20

Dependent Claim 28 words

A tissue gripping device according to claim 16, wherein said gripping fingers of said collar have an arcuately shaped inner face to facilitate contacting and gripping said cannula.

Claim 21

Dependent Claim 22 words

A tissue gripping device according to claim 16, wherein said collar includes at least three gripping fingers spaced equidistant from each other.

Claim 22

Dependent Claim 44 words

A tissue gripping device according to claim 16, wherein said gripping fingers of said collar contact an inner surface of said housing member upon tightening to move from a first at rest diameter to a second, cannula gripping diameter to secure to said cannula.

Claim 23

Dependent Claim 37 words

A tissue gripping device according to claim 16, wherein said housing member and said collet are each provided with a gripping flange at said proximal opening to facilitate gripping and tightening said collet to said housing member.

Claim 24

Dependent Claim 30 words

A tissue gripping device according to claim 16, wherein said tissue contacting surfaces of said expansion members lie in substantially the same plane as a longitudinal axis of said device.

Claim 25

Dependent Claim 30 words

A tissue gripping device according to claim 16, wherein said expansion members cam outwardly at an angle of between 10° and 25° relative to a longitudinal axis of said device.

Claim 26

Dependent Claim 21 words

A tissue gripping device according to claim 23, wherein said expansion members cam outwardly at an angle between 15° and 20°.

Claim 27

Dependent Claim 32 words

A tissue gripping device according to claim 16, wherein expansion members engage said tissue at a force sufficient to withstand at least a 25 lb. pull force before disengaging from said tissue.

Claim 28

Dependent Claim 114 words

A tissue gripping device for use with a cannula, said device comprising: a tubular housing member having a longitudinal passageway for accepting a cannula therein, said housing member having a plurality of slots disposed about the circumference of said housing member; means for releasably securing said housing member to said cannula to allow positioning of said housing member along said cannula; a tissue gripping member positioned within said housing member including a plurality of flexible finger-like expansion members corresponding in number to said slots and being extendable through said slots; and means for advancing said gripping member with respect to said housing member and said cannula to extend said expansion members through said slots.

Claim 29

Dependent Claim 114 words

A tissue gripping device for use with a cannula, said device comprising: a tubular housing member having a longitudinal passageway for accepting a cannula therein, said housing member having a plurality of slots disposed about the circumference of said housing member; means for releasably securing said housing member to said cannula to allow positioning of said housing member along said cannula; a tissue gripping member positioned within said housing member including a plurality of flexible finger-like expansion members corresponding in number to said slots and being extendable through said slots; and means for advancing said gripping member with respect to said housing member and said cannula to extend said expansion members through said slots.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1997-07-18	1998-01-17	1998-07-19	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2001-07-18	2002-01-17	2002-07-19	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2005-07-18	2006-01-17	2006-07-19	$7700.00	Window Closed / Lapsed

Tissue gripping device for use with a cannula and a cannula incorporating the device

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