Guide wire apparatus with location sensing member
First Claim
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1. A system suitable for invasive use and location determination in a patient, comprising:
- a guide wire having proximal, center and distal portions, and a lumen therethrough;
a sensing member capable of detecting an externally-generated electromagnetic energy field, the sensing member including a metal core having distal, center and proximal sections, each section of the metal core further having an associated cross section, with at least a part of the associated cross section of the center section being of smaller dimension than the associated cross section of the distal and proximal sections, wherein said sensing member is housed within the lumen of the guide wire, the center section of the metal core is proximate to the center of the guide wire, and a current conducting wire is wound in a first layer around said distal end of said metal core to form a sensor element, and said sensor element is located near the distal portion of the guide wire;
an externally-located means for generating a current within the sensor element; and
,an externally-located means for detecting a current within the sensor element which is adapted for electrical connection with the sensor element.
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Abstract
The invention is directed to a guide wire apparatus and a method for detecting the location of a guide wire within the body of a patient. The apparatus includes a guide wire with an internally-housed sensing member. The guide wire assembly is structured to provide the response, maneuverability and tactile feel comparable to conventional guide wire devices. The apparatus is useful in medical treatments and diagnoses such as angioplasty or catheterization procedures, for detecting obstructions within a blood vessel of a patient, and the like.
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Citations
20 Claims
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1. A system suitable for invasive use and location determination in a patient, comprising:
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a guide wire having proximal, center and distal portions, and a lumen therethrough; a sensing member capable of detecting an externally-generated electromagnetic energy field, the sensing member including a metal core having distal, center and proximal sections, each section of the metal core further having an associated cross section, with at least a part of the associated cross section of the center section being of smaller dimension than the associated cross section of the distal and proximal sections, wherein said sensing member is housed within the lumen of the guide wire, the center section of the metal core is proximate to the center of the guide wire, and a current conducting wire is wound in a first layer around said distal end of said metal core to form a sensor element, and said sensor element is located near the distal portion of the guide wire; an externally-located means for generating a current within the sensor element; and
,an externally-located means for detecting a current within the sensor element which is adapted for electrical connection with the sensor element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of locating a guide wire apparatus in the body of a patient, comprising:
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(a) inserting a guide wire apparatus into the body, said apparatus being a combination of (i) a guide wire having proximal, center and distal portions, and a lumen therethrough; and (ii) a sensing member housed within said lumen of the guide wire, the sensing member including a metal core having distal, center and proximal sections, each section of the metal core further having an associated cross section, with at least a part of the associated cross section of the center section being of smaller dimension than the associated cross section of the distal and proximal sections, wherein the center section of the metal core is proximate to the center of the guide wire, and a current conducting wire is wound in a first layer around said distal end of said metal core to form a sensing element;
said sensor element located near the distal portion of the guide wire;(b) advancing the guide wire apparatus to a location within the body (c) determining the location of the sensor element within the body of the patient by generating and detecting a current within the sensor element through application of an external magnetic field. - View Dependent Claims (15, 16, 17)
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18. A guide device suitable for invasive use in a patient, comprising:
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a guide wire having proximal, center, and distal portions and a lumen therethrough; and a sensing member housed within the lumen of the guide wire, and having distal, center and proximal sections, said center section of said sensing member proximate said center portion of said guide wire, each of said sections having an associated cross section, and a current conductor sensor element means which is located on the distal section for interacting with an externally-generated electromagnetic field so as to provide a current in the current conducting sensor element means, the associated cross section of the center section having at least in part a smaller dimension than the associated cross section of the distal and proximal sections. - View Dependent Claims (19, 20)
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Specification