Retraction device, system, and method
AssigneeNexGen Medical Systems, Incorporated
InventorsMatthew Jonathan Olson, Keng Thao, Patrick Raymond Haley
Life of this patent
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Abstract
Medical systems and methods for making and using medical systems are disclosed. Example medical systems may include devices capable of capturing and facilitating removal of an obstruction in a vessel or cavity. The medical devices may include a shaft having a plurality of eyelets spaced along the shaft. A pull wire may be connected to the shaft and extend through one or more of the plurality of eyelets. Retraction of the pull wire may result in forming one or more loops in the shaft. A core wire may extend along the shaft to provide a desired stiffness at one or more locations along the shaft and/or along a loop formed with the shaft. The shaft may be formed of a coiled wire.
Claims20
A retraction device comprising:
- a tubular member having a first end portion, a second end portion, and a lumen extending from the first end portion to the second end portion;
- a plurality of eyelets spaced along the tubular member;
- a first elongated member extending through a first eyelet of the plurality of eyelets;
- a second elongated member extending through the lumen of the tubular member;
- and
- wherein a stiffness of the second elongated member varies along a length of the second elongated member.
A retraction device comprising:
- a shaft having a first end portion and a second end portion;
- an elongated member extending along the shaft and connected to the second end portion of the shaft;
- wherein:
- retraction of the elongated member toward the first end portion of the shaft results in forming a first section of a plurality of loops in the shaft and a second section of a plurality of loops in the shaft;
- and
- two or more of the plurality of loops of the first section have a first diameter that is less than a second diameter of two or more of the plurality of loops of the second section.
A method of using a retraction device, the method comprising:
- retracting a pull wire having a distal end portion connected to a distal end portion of a shaft;
- forming two or more loops with the shaft of a first set of loops in response to retracting the pull wire;
- forming two or more loops with the shaft of a second set of loops in response to retracting the pull wire;
- and
- wherein the shaft is configured such that at least two loops of the first set of loops each has a first diameter and at least two loops of the second set of loops each has a second diameter different than the first diameter.
Dependencies are inferred from the claim text.