Spring action medical device

• US 9,108,026 B2
• Filed: 07/08/2010
• Issued: 08/18/2015
• Est. Priority Date: 07/09/2009
• Status: Active Grant

• Current Assignee: Cook Medical Technologies, LLC (Cook Group Incorporated)
• Original Assignee: Cook Medical Technologies, LLC (Cook Group Incorporated)
• Inventors: Deckard, Michael D., Hardert, Michael W., Kay, Thomas A. Jr., Moore, William F., Elsesser, James C., Lentz, David C., Melsheimer, Jeffry S.
• Primary Examiner(s): WEISBERG, AMY REGINA
• Application Number:
  US13/379,975
• Publication Number:
  US 20120165850A1
• Time in Patent Office: 1,867 Days
• Field of Search: 606/108, 606/185, 606127-128, 606/159, 600/585, 604/270, 604/528, 604/510, 604/585, 604/35, 604/118, 604/131, 604/173, 604/532, 500/585
• US Class Current: 1/1
• CPC Class Codes: A61B 17/22012 in direct contact with, or very close to, the obstruction or concrement for removing obstructions in blood vessels by laser A61B18/245
• CPC Class Codes: A61B 2017/22038 with a guide wire
• CPC Class Codes: A61B 2017/22069 Immobilising; Stabilising
• CPC Class Codes: A61B 2017/22094 for crossing total occlusions, i.e. piercing
• CPC Class Codes: A61M 25/09025 with sliding mandrils

Abstract

A spring action medical device includes a spring that may propel a hammer component in a distal direction when the spring is released from a loaded state. When propelled forward by the spring, the hammer component makes contact with a distal tip of the medical device. The distal tip may then transfer a force to an external object, such as an occlusion in a body lumen.

Claims

1. A medical device, comprising:

a body portion;

a distal tip disposed at a distal end of the body portion;

a spring;

a support structure on an inner surface of the body portion; and

a hammer component disposed between the distal tip and the spring, wherein the hammer component is movable relative to the distal tip between a first position and a second position, wherein the hammer component is spaced apart from the distal tip in the first position, and wherein the hammer component is in contact with the distal tip in the second position;

a trigger wire coupled with the hammer component in a configuration where movement of the trigger wire in a proximal direction relative to the body portion retracts the hammer component and compresses the spring into a loaded state between the hammer component and the support structure;

wherein the spring is configured to provide a force when released from a loaded state to propel the hammer component in a distal direction from the first position to the second position to strike the distal tip with the hammer component;

wherein the distal tip is movable relative to the body portion in response to the hammer component striking the distal tip.

2. The medical device of claim 1, wherein the hammer component and the spring are disposed within the body portion;

wherein a first end portion of the spring is coupled with the hammer component, a second end portion of the spring is coupled with a support structure of the body portion, and the spring is compressed between the hammer component and the support structure when the spring is in the loaded state.

3. The medical device of claim 1, wherein the hammer component comprises a distal-most segment and a second segment that is separate from the distal-most segment and movable relative to the distal-most segment;

wherein the trigger wire passes through an opening in the second segment and is connected with the distal-most segment.

4. The medical device of claim 1, further comprising:

an actuator base that comprises a ramped surface with at least one inclined ramp peak and at least one ramp valley; and

an actuator carriage piece coupled with the trigger wire, wherein a surface of the actuator carriage piece is configured to travel along the ramped surface of the actuator base in response to a twisting motion applied to the actuator carriage piece.

5. The medical device of claim 4, wherein the actuator carriage piece is configured to pull the trigger wire in a proximal direction as the actuator carriage piece travels up the at least one inclined ramp peak of the actuator base;

and

wherein the actuator carriage piece is configured to release tension in the trigger wire as the actuator carriage piece falls from the at least one inclined ramp peak into the at least one ramp valley.

6. The medical wire guide of claim 1, further comprising a trigger mechanism configured to selectively engage the trigger wire to hold the spring in the loaded state, wherein the trigger mechanism is configured to selectively release the trigger wire to allow the spring to propel the hammer component in the distal direction.

7. The medical device of claim 1, further comprising an oscillation generator coupled with the trigger wire to pull and release the trigger wire.

8. The medical device of claim 1, further comprising a recoil spring;

wherein the hammer component and the spring are disposed within the body portion;

wherein a first end portion of the recoil spring is connected with the distal tip, a second end portion of the recoil spring is connected with a distal portion of the body portion, and the recoil spring is configured to stretch to allow a distal movement of the distal tip in response to contact between the hammer component and the distal tip.

9. The medical device of claim 1, further comprising a safety wire;

wherein the hammer component and the spring are disposed within the body portion;

wherein a first end portion of the safety wire is connected with the distal tip, a second end portion of the safety wire is connected with a proximal end portion of the body portion, and the safety wire is configured to limit a distal movement of the distal tip relative to the proximal end portion of the body portion.

10. The medical device of claim 1, wherein the body portion comprises a first opening that provides a path for a wire guide to pass into a proximal end of the body portion, pass through an opening in the spring, pass through an opening in the hammer component, and pass out of an opening in the distal tip.

11. The medical device of claim 10, wherein the body portion comprises a second opening configured to provide a path for a trigger wire to pass into a proximal end of the body portion, pass through the opening in the spring, and connect with the hammer component.

12. The medical device of claim 11, further comprising an expandable balloon coupled with the body portion, wherein the body portion comprises a third opening configured to provide access to an inner chamber of the balloon.

13. The medical device of claim 1, wherein the distal tip comprises a distal-most tip of a wire guide or a distal-most tip of a catheter;

and

wherein the distal tip is configured to transfer a force to an adjacent external object in response to contact between the hammer component and the distal tip.

14. The medical device of claim 1, further comprising a body portion, wherein the distal tip is attached to the body portion or is an integral portion of the body portion;

wherein a proximal surface of the distal tip is located inside a cavity of the body portion and a distal surface of the distal tip is located outside the cavity of the body portion; and

wherein the spring is configured to cause the hammer component to travel inside the cavity of the body portion relative to the distal tip when the spring is released from the loaded state, and cause the hammer component to strike the proximal surface of the distal tip within the cavity of the body portion.

15. A medical device, comprising:

a body portion;

a distal tip disposed at a distal end of the body portion;

a support structure on an inner surface of the body portion;

a hammer component that is movable relative to the distal tip between a first position and a second position, wherein the hammer component is spaced apart from the distal tip in the first position, and wherein the hammer component is in contact with the distal tip in the second position;

a spring disposed between the hammer component and the support structure; and

a trigger wire coupled with the hammer component in a configuration where movement of the trigger wire in a proximal direction relative to the body portion retracts the hammer component and compresses the spring into a loaded state between the hammer component and the support structure;

wherein the spring is configured to provide a force when released from the loaded state to propel the hammer component in a distal direction relative to the body portion from the first position to the second position to strike the distal tip with the hammer component;

wherein the distal tip is movable relative to the body portion in response to the hammer component striking the distal tip.