Needle assembly including an aligned magnetic element
First Claim
1. A needle assembly, comprising:
- a hub;
a cannula distally extending from the hub along a longitudinal axis, the cannula defining a distal needle tip; and
a magnetic element included in or adjacent to the hub, the magnetic element defining a magnetic axis, wherein the magnetic element is positioned such that the magnetic axis is aligned in a predetermined orientation with respect to at least one of the hub and the cannula, and wherein the magnetic element includes a permanent magnet.
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Abstract
A guidance system for assisting with the insertion of a needle into a patient body is disclosed. The guidance system utilizes ultrasound imaging or other suitable imaging technology. In one embodiment, the guidance system comprises an imaging device including a probe for producing an image of an internal body portion target, such as a vessel. One or more sensors are included with the probe. The sensors sense a detectable characteristic related to the needle, such as a magnetic field of a magnet included with the needle. The system includes a processor that uses data relating to the sensed characteristic to determine a 3-D position of the needle. The system includes a display for depicting the position of the needle. A needle assembly including a hub, cannula, and magnetic element is also disclosed, wherein a magnetic axis of the magnetic element is configured to be coaxially aligned with the needle cannula.
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Citations
14 Claims
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1. A needle assembly, comprising:
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a hub; a cannula distally extending from the hub along a longitudinal axis, the cannula defining a distal needle tip; and a magnetic element included in or adjacent to the hub, the magnetic element defining a magnetic axis, wherein the magnetic element is positioned such that the magnetic axis is aligned in a predetermined orientation with respect to at least one of the hub and the cannula, and wherein the magnetic element includes a permanent magnet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A needle assembly, comprising:
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a hub; a cannula distally extending from the hub along a longitudinal axis, the cannula defining a distal needle tip; and a magnetic element included with the hub, the magnetic element including a hole through which a portion of the cannula extends, the magnetic element defining a magnetic axis, wherein the magnetic element is positioned such that the magnetic axis is substantially coaxially aligned with the longitudinal axis of the cannula, and wherein the magnetic element includes a permanent magnet. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification