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 plurality of 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 coupled to the annular groove on the outer surface of the distal portion of the sleeve, extending distally from the distal end of the sleeve to the annular groove on the outer surface of the distal portion of the cannula, and being coupled to the annular groove of the cannula;
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 the distal ends of the plurality of channels on the outer surface of the cannula, and the space between the outer surface of the cannula with the plurality of channels, the inner surface of the sleeve, the seal, and the balloon forming a substantially closed chamber.
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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
17 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 plurality of 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 coupled to the annular groove on the outer surface of the distal portion of the sleeve, extending distally from the distal end of the sleeve to the annular groove on the outer surface of the distal portion of the cannula, and being coupled to the annular groove of the cannula; 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 the distal ends of the plurality of channels on the outer surface of the cannula, and the space between the outer surface of the cannula with the plurality of 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 end, a distal end, a lumen extending between the proximal end and the distal end, an outer surface, and a plurality of channels on the outer surface of the cannula, the plurality of channels extending along the length of the cannula from a proximal end adjacent the proximal end of the cannula to a distal end adjacent the distal end of the cannula; a sleeve including a substantially longitudinal tube having a proximal end, a distal end, and a lumen extending between the proximal end and the distal end, the lumen defining an inner surface of the sleeve, and 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 sealingly coupled to the distal end of the sleeve, extending distally from the distal end of the sleeve, and sealingly engaged to the cannula at a location distal the distal end of the sleeve; and wherein the sleeve is coupled to the cannula and positioned over the cannula with the proximal end of the sleeve sealingly engaging the cannula adjacent the proximal end of the cannula, the distal end of the sleeve being positioned proximal to the distal ends of the plurality of channels on the outer surface of the cannula, and the space defined by the outer surface of the cannula with the plurality of 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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Specification