Abstract
Background
Accurate ventricular catheter (VC) placement plays an important role in reducing the risk of ventriculoperitoneal shunt failure. Free-hand VC insertion is associated with a significant misplacement rate. Consequently, several expensive alternative methods that are unfortunately not available worldwide have been used. To overcome these limitations, we developed a simple surgical technique based on radio-anatomical landmarks aimed at reducing VC’s misplacements.
Method
We reproduce the preoperative imaging on the patient’s head using common anatomical landmarks. This allows defining stereotactic VC coordinates to be followed during the surgical procedure.
Conclusion
This simple and cost-effective method improves VC insertion accuracy.
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Abbreviations
- 2D:
-
Two-dimensional
- 3D:
-
Three-dimensional
- CP:
-
Catheter plane
- CSF:
-
Cerebrospinal fluid
- CT:
-
Computed tomography
- EAC:
-
External auditory canal
- Ep:
-
Entry point
- FOM:
-
Foramen of Monro
- Fp:
-
Frontal point
- IBO:
-
Inferior border of the orbit
- MPR:
-
Multi-planar reconstruction
- MRI:
-
Magnetic resonance imaging
- OP:
-
Oblique plane
- RP:
-
Reference plane
- Tp:
-
Target point
- VC:
-
Ventricular catheter
- VPS:
-
Ventriculoperitoneal shunt
- Ep-x:
-
x coordinate for the entry point
- Ep-x’:
-
x’ coordinate for the entry point
- Ep-y:
-
y coordinate for the entry point
- Fp-x:
-
x coordinate for the frontal point
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Key points
1. Determine all reference landmarks on the preoperative exam.
2. Reproduce these landmarks on the patient’s head.
3. Keep the OP parallel to the floor.
4. Maintain CP, OP, and Ep visible after draping.
5. Insert the drain following a trajectory corresponding to the intersection between the OB and the CP.
6. Check CSF outflow until reaching the Tp.
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This article is part of the Topical Collection on CSF Circulation
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This video illustrates the stereotactic ventricular catheter insertion technique based on radio-anatomical landmarks. (MP4 43,959 kb)
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Bruneau, M., Spitaels, J. & Riva, M. Free-hand stereotactic ventricular catheter insertion technique based on radio-anatomical landmarks. How I do it. Acta Neurochir 163, 1097–1102 (2021). https://doi.org/10.1007/s00701-020-04549-6
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DOI: https://doi.org/10.1007/s00701-020-04549-6