Cannula retention device
First Claim
Patent Images
1. A fixation apparatus to hold an object to an opening in a body wall comprising:
- a flexible elongated member having a proximal and distal end expanding outwardly under a force when confronted with low or no resistance while being held against substantial expansion when contacting the body wall opening, whereupon the object is secured as said member expands further on either side of the opening than at the opening, said expansion on either side of said opening self-adjusting to the wall thickness by virtue of the wall holding the portion of said member adjacent said wall from substantial expansion.
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Accused Products
Abstract
The invention relates to a cannula with a fixation mechanism actuable to secure the cannula above and below the body wall in a single operation. The preferred embodiment involves spiral slit tubing in the form of a sleeve secured to the distal end of the cannula while mounted loosely over the cannula at the proximal end. A motion, such as twist and/or translation, is applied to the sleeve to make the spiral slit tubing expand to fixate the cannula.
293 Citations
23 Claims
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1. A fixation apparatus to hold an object to an opening in a body wall comprising:
a flexible elongated member having a proximal and distal end expanding outwardly under a force when confronted with low or no resistance while being held against substantial expansion when contacting the body wall opening, whereupon the object is secured as said member expands further on either side of the opening than at the opening, said expansion on either side of said opening self-adjusting to the wall thickness by virtue of the wall holding the portion of said member adjacent said wall from substantial expansion. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus for securing an object to an opening in a body wall comprising:
a singular expanding member at said opening mounted to the object for simultaneously securing the object against forcibly being easily pushed in and pulled out at said opening. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of securing an object to a body opening comprising the steps of:
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providing a securing member and attaching it to the object, the securing member having a flexible, longitudinally extending body; inserting the object into the opening so that a portion of the securing member extends on each side of the body opening; applying a force to the securing member mounted to the object in order to radially expand the securing member, whereby the securing member will expand simultaneously on either side of the opening to a size bigger than said opening to secure the object, the securing member being substantially retained against radial expansion by said opening. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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Specification