Device and method for accessing a body cavity
First Claim
1. An abdominal access assembly comprising:
- a tubular member having a proximal end, a distal end, and a lumen therethrough;
a first sleeve disposed coaxially over the tubular member, said sleeve having;
(a) a distal radially expandable region,(b) a proximal non-expandable region,wherein the sleeve is shiftable over the tubular member from an axially elongated configuration to an axially shortened configuration to radially expand the distal region, wherein the expanded distal region provides a structure which is capable of sealing against an internal surface of an abdominal wall;
a pneumostasis valve attached to the proximal end of the tubular member; and
an obturator removably receivable in the lumen of the tubular member.
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Accused Products
Abstract
Devices and methods for providing access to a body cavity without substantial loss of inflation gas therein. The device comprises an access assembly 10 that may have a tubular member 12, at least one sleeve 16 coaxially disposed over the tubular member, a pneumostasis valve 13 attached to the tubular member, and an obturator 11 removably received in the tubular member. Sleeve 16 comprises expandable region 19 capable of forming an anchor 30 upon axial compression. A method to provide access using assembly 10 comprises insertion of the assembly 10 into the body cavity, expanding region 19, and insufflating the cavity with gas. Expandable region 19 on assembly 10 is axially compressed to form anchor 30 to seal against an interior wall of the body cavity. The method may further comprise either a second expanded anchor 50 or a non-expanding anchor 40 which clamps against an exterior wall of the body cavity to securely position and seal the access assembly 10.
354 Citations
21 Claims
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1. An abdominal access assembly comprising:
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a tubular member having a proximal end, a distal end, and a lumen therethrough; a first sleeve disposed coaxially over the tubular member, said sleeve having; (a) a distal radially expandable region, (b) a proximal non-expandable region, wherein the sleeve is shiftable over the tubular member from an axially elongated configuration to an axially shortened configuration to radially expand the distal region, wherein the expanded distal region provides a structure which is capable of sealing against an internal surface of an abdominal wall; a pneumostasis valve attached to the proximal end of the tubular member; and an obturator removably receivable in the lumen of the tubular member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for providing access to a patient'"'"'s abdomen, said method comprising:
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introducing a tubular body through a penetration in the patient'"'"'s abdomen; axially compressing a radially expandable member mounted on the tubular body to radially expand the member to provide a seal against the internal surface of an abdominal wall; and insufflating the abdomen with a gas, wherein the seal inhibits loss of the gas through the penetration. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A method for providing access through a patient'"'"'s abdominal wall comprising:
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introducing a tubular body through a penetration in the patient'"'"'s abdominal wall; radially expanding a first radially expandable member mounted on said tubular body; radially expanding a second radially expandable member, mounted proximal of the first member on said tubular body, by axially compressing said second member; said expandable members clamping the abdominal wall therebetween.
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21. An improved cannula and obturator assembly of the type comprising
(1) a cannula having a pneumostasis valve, a distal seal, and a proximal clamp and (2) an obturator removably receivable in a lumen of the cannula, the improvement comprising: a non-distensible imperforate cylinder disposed over a distal portion of the cannula, wherein said cylinder expands radially when axially shortened to provide the distal seal.
Specification