Catheter with atraumatic tip
First Claim
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1. A medical device comprising:
- a shaft comprising an axis and further comprising a first, proximal segment and a second, distal segment,wherein the first segment is configured to buckle upon application of a first critical force thereto; and
wherein the second segment includes an outer surface and an inner surface and the second segment is configured to buckle upon application of a second critical force thereto, wherein the second critical force is lower than the first critical force;
a sensor configured to detect an amount of force transmitted by the second, distal segment of the medical device to tissue contacting the second segment, wherein said sensor is configured to detect said amount of force before said buckling of said second segment;
said second segment being further configured to limit the amount of force transmitted by the second segment to tissue contacting the second segment after an application of the second critical force to the second segment as the device is advanced over a distance toward the tissue, wherein the second critical force is between an amount of force required to create a transmural lesion within a range between 20 to 50 grams-force and that capable of causing a perforation of the tissue within a range between 50 to 100 grams-force.
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Abstract
A medical device is provided comprising a shaft comprising a first segment and a second segment. The first segment is configured to buckle upon application of a first critical force. The second segment includes an outer surface and an inner surface and is configured to buckle upon application of a second critical force. The second critical force is lower than the first critical force. The medical device further comprises a coil disposed radially inwardly of the inner surface of the second segment.
64 Citations
17 Claims
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1. A medical device comprising:
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a shaft comprising an axis and further comprising a first, proximal segment and a second, distal segment, wherein the first segment is configured to buckle upon application of a first critical force thereto; and wherein the second segment includes an outer surface and an inner surface and the second segment is configured to buckle upon application of a second critical force thereto, wherein the second critical force is lower than the first critical force; a sensor configured to detect an amount of force transmitted by the second, distal segment of the medical device to tissue contacting the second segment, wherein said sensor is configured to detect said amount of force before said buckling of said second segment; said second segment being further configured to limit the amount of force transmitted by the second segment to tissue contacting the second segment after an application of the second critical force to the second segment as the device is advanced over a distance toward the tissue, wherein the second critical force is between an amount of force required to create a transmural lesion within a range between 20 to 50 grams-force and that capable of causing a perforation of the tissue within a range between 50 to 100 grams-force. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A medical device comprising:
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a shaft comprising an axis and further comprising a first, proximal segment and a second, distal segment, wherein the first segment is configured to buckle upon application of a first critical force thereto; and wherein the second segment includes an outer surface and an inner surface and the second segment is configured to buckle upon application of a second critical force thereto, wherein the second critical force is lower than the first critical force; a sensor configured to detect an amount of force transmitted by the second, distal segment of the medical device to tissue contacting the second segment, wherein said sensor is configured to detect said amount of force before said buckling of said second segment; means for limiting the amount of force transmitted by the second segment to tissue contacting the second segment after an application of the second critical force to the second segment as the device is advanced over a distance toward the tissue, wherein the second critical force is between an amount of force required to create a transmural lesion within a range between 20 to 50 grams-force and that capable of causing a perforation of the tissue within a range between 50 to 100 grams-force.
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Specification