Percutaneous needle guide and method

摘要

A percutaneous needle guide includes a housing and an inclinometer secured to the housing for sensing a two dimensional inclination of the housing relative to the earth's gravitational field and for providing an indication thereof. A percutaneous needle is slidably mounting to the housing in a fixed axial orientation relative to the housing. A needle measuring device is mounted in the housing and operative by linear motion of the percutaneous needle so as to measure the linear position of the percutaneous needle relative to the housing and providing a measurement indication.

主权项

1. A percutaneous needle guide comprising;
a housing, wherein the housing includes a bottom wall; an inclinometer secured to the housing for sensing a two dimensional inclination of the housing relative to the earth's gravitational field and for providing an indication thereof; a slidable percutaneous needle mounting arrangement secured to the housing for slidably holding a percutaneous needle in a fixed axial orientation relative to the housing, wherein the slidable percutaneous needle mounting arrangement is configured to slidablv hold any of a plurality of different diameter percutaneous needles along a Z-axis that is perpendicular to the bottom wall of the housing; and a needle measuring device mounted in the housing and operative with linear motion of the percutaneous needle so as to measure the position of the percutaneous needle relative to the housing and providing a measurement, the needle measuring device including a first wheel mounted on a wheel axis, the first wheel being positioned to contact the needle when the needle holder is slidably held against the needle, and the needle measuring device includes a measurement tape positioned laterally between the first wheel and the needle, the measurement tape being configured to wrap around at least a portion of a circumference of the first wheel; wherein linear movement of the needle substantially parallel to the Z-axis causes the first wheel to rotate about the wheel axis and facilitate movement of the measurement tape proportional to linear movement of the needle.