miethke THOMALE GUIDE Gebrauchsanweisung Seite 17

parameters can be applied on to the patient
data and intra-operatively the angle can be
applied to the THOMALE GUIDE for catheter
insertion. This method is especially recom-
mended in case of very narrow ventricles.
Caution: The acurancy of the determination
of the angle depends on the used image /
the underlying image.
Fig. 6: cCT in a reconstructed layer along the catheter
Fig. 7: MRI in a reconstructed layer along the catheter
2. To allow an easier unique measurement of
the trajectory angle, import a coronary cross-
section. Preferably, the image should show
the level of the anterior horn in front of the
foramen Monro (Fig. 8 and 9). Mark on this
image the entry point, the projected target
location in the ventricle and thereby the re-
sulting trajectory. The distance to the centre
line and the depth of the ventricle need to be
considered when marking the projected tar-
get. Now, draw the tangent. Proceed by set-
ting two points, both with the same distance
medial and laterally to the entry point. The re-
lation between those two points correspond
to a tangent. Accordingly, the angle between
trajectory and tangent can be determined
and set on the THOMALE GUIDE.
Fig. 8: cCT in coronary layer
Fig. 9: MRI in coronary layer
Additionally to these methods and this instruc-
tion for use, an application for smart phones is
available.
For example: by importing an image, the angle
of the trajectory to the tangent can now easily
be determined with the help of the application.
INSTRUCTIONS FOR USE |
GB
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