Method and orientation device for marking a predetermined guide path of a medical instrument

Abstract

In a method for marking a predetermined guide path of a medical instrument in particular a needle, at least one guide path having an angle relative to vertical is indicated by means of at least one adjustable indicator unit such as a light source, and a one-dimensional or two-dimensional inclination sensor is used to adjust the at least one indicator unit with regard to the angle relative to vertical.

Description

technical field [0001] The invention relates to a method for marking a predetermined guide path of a medical device, in particular a needle, wherein at least one guide with an angle to the vertical is indicated by at least one adjustable indicating device, in particular a light source path, the invention also relates to the associated orientation device. Background technique [0002] For example minimally invasive interventions performed with medical instruments such as puncture needles or biopsy needles are often planned on the basis of images taken with computed tomography devices (CT devices) or magnetic resonance devices (MR). direction, collectively referred to as the guide path. For a long time, it has often been the case that the actual intervention is carried out by the operator on the basis of his personal experience without additional assistance, after the planning has been completed. For this purpose, if necessary, the needle is first introduced only a certain d...

AI Technical Summary

Problems solved by technology

[0008] Furthermore, navigation systems have been proposed which use various cameras or high-frequency markers to determine the correct position and angular attitude of the instrument, but this solution is expensive

[0009] The same applies to the manipulators used in the image recording device, which, in addition to high implementation costs, introduce additional hardware and complexity during the intervention and lead to great difficulty in sterilization

[0010] But even a more advantageously realized orientation device, as mentioned in the aforementioned DE 195 01 069 A1, has the disadvantage that in particular it can easily occur that the support bearing the indicator device is not strictly oriented in particular with respect to the vertical

Since, in particular, the optical display device is clearly arranged at a distance from the actual intervention site, small angular deviations from the vertical can lead to clearly false indications here.

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