SEAL TIP CATHETER DEVICES OR METHODS
First Claim
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1. A medical apparatus comprising:
- a first catheter, comprising;
a first catheter body including a proximal portion, a distal portion, and a longitudinal bore extending between the proximal portion of the first catheter body and the distal portion of the first catheter body, the longitudinal bore defining an inner circumferential periphery; and
an elastically deformable first seal, located at the distal portion of the first catheter body, the first seal being more flexible than a more proximal portion of the first catheter body, the first seal defining an inner circumferential periphery that, in a first configuration, is laterally smaller than the inner circumferential periphery of a more proximal portion of the bore to at least partially occlude the bore at the distal portion of the catheter body and, in a second configuration, the inner circumferential periphery of the first seal is expandable relative to the first configuration.
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Abstract
A first catheter can include a first catheter body providing a longitudinal bore and can have flexible first seal at its distal portion. The first seal can at least partially occlude the bore at the distal portion of the catheter body in a first configuration. A second catheter can be slid into or through the bore of the first catheter body, such as to expand the first seal into a second configuration. Wicking or reflux can be inhibited. Other features, applications, and methods can be included.
50 Citations
49 Claims
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1. A medical apparatus comprising:
a first catheter, comprising; a first catheter body including a proximal portion, a distal portion, and a longitudinal bore extending between the proximal portion of the first catheter body and the distal portion of the first catheter body, the longitudinal bore defining an inner circumferential periphery; and an elastically deformable first seal, located at the distal portion of the first catheter body, the first seal being more flexible than a more proximal portion of the first catheter body, the first seal defining an inner circumferential periphery that, in a first configuration, is laterally smaller than the inner circumferential periphery of a more proximal portion of the bore to at least partially occlude the bore at the distal portion of the catheter body and, in a second configuration, the inner circumferential periphery of the first seal is expandable relative to the first configuration. - View Dependent Claims (2, 6, 7, 8, 11, 12, 13, 15, 32, 33, 36, 37, 39, 43, 46, 47)
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49. The apparatus of claim, wherein, in the second configuration, an outer dimension at or near the distal portion of the first catheter body is actuated to extend laterally outward by an amount that is sufficient to inhibit backflow of infusate outside of the first catheter body along a tract through tissue through which the first catheter body passes.
Specification