Adjustable radiation source
First Claim
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1. A medical device for intravascular ionizing radiation therapy, comprising:
- an elongate shaft having a proximal end and a distal end, the elongate shaft including an inner member and an outer member wherein the inner member is longitudinally movable relative to the outer member; and
a variable-length ionizing radiation source disposed on the distal end of the shaft, wherein a proxinal end of the radiation source is connected to a distal end of the outer member, and a distal end of the radiation source is connected to a distal end of the inner member.
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Abstract
An intravascular medical device including an elongate shaft and a variable-length ionizing radiation source disposed on the distal end thereof. The present invention may be manifested as a source wire, a guide wire, a catheter or other suitable intravascular device with an adjustable length radiation source. For example, the adjustable source may be implemented on a wire having a variable-length radioactive tip, on a balloon catheter having a variable-length balloon inflated with a radioactive fluid, or on a catheter having means for advancing and retracting radioactive seeds of variable number and/or spacing.
188 Citations
12 Claims
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1. A medical device for intravascular ionizing radiation therapy, comprising:
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an elongate shaft having a proximal end and a distal end, the elongate shaft including an inner member and an outer member wherein the inner member is longitudinally movable relative to the outer member; and
a variable-length ionizing radiation source disposed on the distal end of the shaft, wherein a proxinal end of the radiation source is connected to a distal end of the outer member, and a distal end of the radiation source is connected to a distal end of the inner member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A medical device for intravascular ionizing radiation therapy, comprising:
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an elongate shaft having a proximal end and a distal end;
an ionizing radiation source comprising a variable-length tip disposed on the distal end of the shaft; and
means for varying the length of the radiation source, wherein the means for varying the length of the radiation source comprises a movable member connected to an end of the variable-length tip.
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10. A method of delivering ionizing radiation to a treatment site inside a patient'"'"'s vasculature, comprising the steps of:
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providing a medical device including an elongate shaft having a variable-length ionizing radiation source comprising a variable-length lip disposed on a distal end of the shaft and a means for varying the length of the radiation source, wherein the means for varying the length of the radiation source comprises a movable member connected to an end of the vanable-length tip;
inserting the medical device into the vasculature of the patient;
changing the length of the radiation source; and
removing the medical device from the vasculature of the patient. - View Dependent Claims (11, 12)
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Specification