BALLOON TROCAR
First Claim
1. A cannula assembly, comprising:
- a cannula including a substantially longitudinal tube having a proximal end, a distal end, a lumen extending between the proximal end and the distal end, a proximal portion having a first, larger periphery, a distal portion having a second, smaller periphery, an annular groove on the outer surface of the distal portion of the cannula toward the distal end of the cannula, and a plurality of channels on the outer surface of the distal portion of the cannula, the channels extending along the length of the cannula from substantially a proximal end of the distal portion of the cannula distally to a point proximal to the annular groove near the distal end of the cannula;
a sleeve including a substantially longitudinal tube having a proximal end, a distal end, a lumen extending between the proximal end and the distal end, a proximal portion having a first, larger periphery, a distal portion having a second, smaller periphery, and an annular groove on the outer surface of the distal portion of the sleeve toward the distal end of the sleeve, the lumen of the sleeve being configured to accept the cannula;
a balloon including a tubular sleeve, the balloon being sufficiently long to extend between and cover the annular groove on the outer surface of the distal portion of the cannula and the annular groove on the outer surface of the distal portion of the sleeve, the balloon being coupled to the annular groove on the outer surface of the distal portion of the cannula and the annular groove on the outer surface of the distal portion of the sleeve;
grease, the grease coating an inner surface of the balloon; and
a seal positioned between the cannula and the sleeve and compressed sufficiently to form a seal between the cannula and the sleeve,wherein the sleeve being coupled to the cannula and positioned over the cannula with the proximal portion of the sleeve fitting over at least a distal region of the proximal portion of the cannula and the distal portion of the sleeve fitting over at least a portion of the distal portion of the cannula,the distal end of the sleeve being positioned proximal to a distal end of the plurality of channels on the outer surface of the cannula, andthe space between the outer surface of the cannula with the channels, the inner surface of the sleeve, the seal and the balloon forming a substantially closed chamber.
8 Assignments
0 Petitions
Accused Products
Abstract
A balloon trocar includes a cannula assembly including a cannula and an outer sleeve fitting over the cannula. The distal end of the outer sleeve is proximal to the distal end of the cannula. A balloon is coupled to a distal portion of the sleeve and a distal portion of the cannula. The outer surface of the cannula includes a plurality of longitudinal channels for transmitting gas or fluid to the balloon. A bolster having a gel pad at its distal portion is slidably mounted to the cannula assembly and may be locked in a desired position. In use, the trocar is inserted into an incision through a body wall and into a body cavity. The balloon is inflated and the cannula assembly pulled proximally against the incision while the bolster is slid distally to the body wall and locked in place to seal the incision with the compressed balloon.
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Citations
47 Claims
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1. A cannula assembly, comprising:
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a cannula including a substantially longitudinal tube having a proximal end, a distal end, a lumen extending between the proximal end and the distal end, a proximal portion having a first, larger periphery, a distal portion having a second, smaller periphery, an annular groove on the outer surface of the distal portion of the cannula toward the distal end of the cannula, and a plurality of channels on the outer surface of the distal portion of the cannula, the channels extending along the length of the cannula from substantially a proximal end of the distal portion of the cannula distally to a point proximal to the annular groove near the distal end of the cannula; a sleeve including a substantially longitudinal tube having a proximal end, a distal end, a lumen extending between the proximal end and the distal end, a proximal portion having a first, larger periphery, a distal portion having a second, smaller periphery, and an annular groove on the outer surface of the distal portion of the sleeve toward the distal end of the sleeve, the lumen of the sleeve being configured to accept the cannula; a balloon including a tubular sleeve, the balloon being sufficiently long to extend between and cover the annular groove on the outer surface of the distal portion of the cannula and the annular groove on the outer surface of the distal portion of the sleeve, the balloon being coupled to the annular groove on the outer surface of the distal portion of the cannula and the annular groove on the outer surface of the distal portion of the sleeve; grease, the grease coating an inner surface of the balloon; and a seal positioned between the cannula and the sleeve and compressed sufficiently to form a seal between the cannula and the sleeve, wherein the sleeve being coupled to the cannula and positioned over the cannula with the proximal portion of the sleeve fitting over at least a distal region of the proximal portion of the cannula and the distal portion of the sleeve fitting over at least a portion of the distal portion of the cannula, the distal end of the sleeve being positioned proximal to a distal end of the plurality of channels on the outer surface of the cannula, and the space between the outer surface of the cannula with the channels, the inner surface of the sleeve, the seal and the balloon forming a substantially closed chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A cannula assembly, comprising:
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a cannula including a substantially longitudinal tube having a proximal ends a distal end, a lumen extending between the proximal end and the distal end, a proximal portion having a first, larger periphery, a distal portion having a second, smaller periphery, an annular groove on the outer surface of the distal portion of the cannula toward the distal end of the cannula, and a plurality of channels on the outer surface of the distal portion of the cannula, the channels extending along the length of the cannula from substantially a proximal end of the distal portion of the cannula distally to a point proximal to the annular groove near the distal end of the cannula; a sleeve including a substantially longitudinal tube having a proximal end, a distal end, a lumen extending between the proximal end and the distal end, a proximal portion having a first, larger periphery, a distal portion having a second, smaller periphery, and an annular groove on the outer surface of the distal portion of the sleeve toward the distal end of the sleeve, the lumen of the sleeve being configured to accept the cannula; a balloon including a tubular sleeve, the tubular sleeve including a distensible thermoplastic elastomeric material, the balloon being sufficiently long to extend between and cover the annular groove on the outer surface of the distal portion of the cannula and the annular groove on the outer surface of the distal portion of the sleeve, the balloon being coupled to the annular groove on the outer surface of the distal portion of the cannula and the annular groove on the outer surface of the distal portion of the sleeve; and a seal positioned between the cannula and the sleeve and compressed sufficiently to form a seal between the cannula and the sleeve, wherein the sleeve being coupled to the cannula and positioned over the cannula with the proximal portion of the sleeve fitting over at least a distal region of the proximal portion of the cannula and the distal portion of the sleeve fitting over at least a portion of the distal portion of the cannula, the distal end of the sleeve being positioned proximal to a distal end of the plurality of channels on the outer surface of the cannula, and the space between the outer surface of the cannula with the channels, the inner surface of the sleeve, the seal and the balloon forming a substantially closed chamber. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. A cannula assembly, comprising:
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a cannula including a substantially longitudinal tube having a proximal end, a distal end, a lumen extending between the proximal end and the distal end, a proximal portion having a first, larger periphery, a distal portion having a second, smaller periphery, an annular groove on the outer surface of the distal portion of the cannula toward the distal end of the cannula, and a plurality of channels on the outer surface of the distal portion of the cannula, the channels extending along the length of the cannula from substantially a proximal end of the distal portion of the cannula distally to a point proximal to the annular groove near the distal end of the cannula; a sleeve including a substantially longitudinal tube having a proximal end, a distal end, a lumen extending between the proximal end and the distal end, a proximal portion having a first, larger periphery, a distal portion having a second, smaller periphery, an annular groove on the outer surface of the distal portion of the sleeve toward the distal end of the sleeve, and a plurality of raised rings spaced longitudinally along the length of the outer surface of the distal portion of the sleeve, the lumen of the sleeve being configured to accept the cannula, the distal portion of the sleeve including a distal taper, with the proximal end of the distal portion of the sleeve having a larger periphery than the distal end of the distal portion of the sleeve, the plurality of raised rings producing a distal taper, with the raised rings toward the proximal end of the distal portion of the sleeve having a larger periphery than the raised rings toward the distal end of the distal portion of the sleeve, the taper of the raised rings being smaller than the taper of the outer surface of the distal portion of the sleeve; a balloon including a tubular sleeve, the balloon being sufficiently long to extend between and cover the annular groove on the outer surface of the distal portion of the cannula and the annular groove on the outer surface of the distal portion of the sleeve, the balloon being coupled to the annular groove on the outer surface of the distal portion of the cannula and the annular groove on the outer surface of the distal portion of the sleeve; and a seal positioned between the cannula and the sleeve and compressed sufficiently to form a seal between the cannula and the sleeve, wherein the sleeve being coupled to the cannula and positioned over the cannula with the proximal portion of the sleeve fitting over at least a distal region of the proximal portion of the cannula and the distal portion of the sleeve fitting over at least a portion of the distal portion of the cannula, the distal end of the sleeve being positioned proximal to a distal end of the plurality of channels on the outer surface of the cannula, and the space between the outer surface of the cannula with the channels, the inner surface of the sleeve, the seal and the balloon forming a substantially closed chamber. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A cannula assembly, comprising:
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a cannula including a substantially longitudinal tube having a proximal end, a distal end, a lumen extending between the proximal end and the distal end, a proximal portion having a first, larger periphery, a distal portion having a second, smaller periphery, an annular groove on the outer surface of the distal portion of the cannula toward the distal end of the cannula, and a plurality of channels on the outer surface of the distal portion of the cannula, the channels extending along the length of the cannula from substantially a proximal end of the distal portion of the cannula distally to a point proximal to the annular groove near the distal end of the cannula; a sleeve including a substantially longitudinal tube having a proximal end, a distal end, a lumen extending between the proximal end and the distal end, a proximal portion having a first, larger periphery, a distal portion having a second, smaller periphery, and an annular groove on the outer surface of the distal portion of the sleeve toward the distal end of the sleeve, the lumen of the sleeve being configured to accept the cannula; a balloon including a tubular sleeve, the balloon being sufficiently long to extend between and cover the annular groove on the outer surface of the distal portion of the cannula and the annular groove on the outer surface of the distal portion of the sleeve, the balloon being coupled to the annular groove on the outer surface of the distal portion of the cannula and the annular groove on the outer surface of the distal portion of the sleeve; a seal positioned between the cannula and the sleeve and compressed sufficiently to form a seal between the cannula and the sleeve; and a bolster slidably adjustable along the length of the sleeve proximal to the balloon, the bolster comprising a base, a clamping mechanism at a proximal portion of the base, and a pad at a distal portion of the base, the clamping mechanism including an over-center lock design, the pad being made of an elastomeric, polymeric material, the pad including a hollow body, a first, proximal retention flange, and a second, distal, body contact flange, the hollow body having a longitudinal axis, the hollow body having a peripheral wall including a wall thickness, the wall of the hollow body being flexible and having shape memory, the first, proximal, retention flange being positioned at a proximal end of the pad and extending radially inwardly from the hollow body wall of the pad, the retention flange including an aperture positioned substantially along the axis of the hollow body of the pad, the second, distal, body contact flange being positioned at a distal end of the pad and extending radially inwardly from the hollow body wall of the pad, the body contact flange including an aperture positioned substantially along the axis of the hollow body of the pad, the aperture in the body contact flange being sized to receive the sleeve, wherein the sleeve being coupled to the cannula and positioned over the cannula with the proximal portion of the sleeve fitting over at least a distal region of the proximal portion of the cannula and the distal portion of the sleeve fitting over at least a portion of the distal portion of the cannula, the distal end of the sleeve being positioned proximal to a distal end of the plurality of channels on the outer surface of the cannula, and the space between the outer surface of the cannula with the channels, the inner surface of the sleeve, the seal and the balloon forming a substantially closed chamber. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47)
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Specification