Compound barb medical device and method

A compound barb medical device comprising:

• an elongate body;
• and
• at least one barb extending from the elongate body and defining an inner surface, the inner surface including:
• a first portion disposed at a first orientation relative to a longitudinal axis of the elongate body;
• a second portion disposed at a second orientation relative to the longitudinal axis;
• and
• a third portion disposed at a third orientation relative to the longitudinal axis.

A compound barb medical device comprising:

• an elongate body, wherein the elongate body is a monofilament suture including an outer surface in direct contact with tissue;
• and
• at least one barb extending from the elongate body and defining an inner surface, the inner surface including:
• a first portion disposed at a first orientation relative to a first longitudinal axis of the elongate body, wherein the first portion is disposed at a first angle from about 0 degrees to about 90 degrees relative to the first longitudinal axis of the elongate body;
• and
• a second portion disposed at a second orientation relative to a second longitudinal axis of the elongate body, wherein the second portion is disposed at a second angle from about 0 degrees to about 90 degrees relative to the second longitudinal axis of the elongate body.

A method of forming a compound barb on a medical device, comprising:

• providing a medical device having a longitudinal axis;
• and
• applying vibrational energy to a cutting element to form a compound barb on at least a portion of the medical device, wherein forming the compound barb includes:
• forming a first cut in the medical device, the first cut having a first ratio of cut depth to diameter of the medical device;
• and
• forming a second cut in the medical device, the second cut having a second ratio of cut depth to diameter of the medical device different from the first ratio.

A method of forming a compound barb on a medical device, comprising:

• providing a medical device having a longitudinal axis and an elongate body;
• and
• applying vibrational energy to a cutting element to form a compound barb on at least a portion of the medical device, wherein forming the compound barb includes:
• forming a first linear cut in the medical device to form a first portion formed from the elongate body at a first angle α of from 30 degrees to 50 degrees and a first ratio cut depth which is approximately 1% to about 40% of the elongate body;
• forming a second linear cut in the medical device to form a second portion formed from the elongate body at a second angle β of approximately 5 degrees to about 40 degrees and a second ratio cut depth which is approximately 5% to about 50% of the elongate body,
• wherein the first angle α is greater than the second angle β to provide the compound barb having the first portion disposed at a first orientation relative to the longitudinal axis of the elongate body and the second portion disposed at a second orientation relative to the longitudinal axis of the elongate body.