gms | German Medical Science

55. Jahrestagung der Deutschen Gesellschaft für Neurochirurgie e. V. (DGNC)
1. Joint Meeting mit der Ungarischen Gesellschaft für Neurochirurgie

Deutsche Gesellschaft für Neurochirurgie (DGNC) e. V.

25. bis 28.04.2004, Köln

“Poor man’s navigation” – A simple method for the placement of pedicle screws in spinal standard instrumentation

“Poor man`s navigation” – eine simple Methode der Schraubenplatzierung bei Standardinstrumentationen

Meeting Abstract

  • corresponding author Felix Hübner - Neurochirurgische Universitätsklinik Ulm, Günzburg
  • R. W. König - Neurochirurgische Universitätsklinik Ulm, Günzburg
  • W. Börm - Neurochirurgische Universitätsklinik Ulm, Günzburg
  • H.-P. Richter - Neurochirurgische Universitätsklinik Ulm, Günzburg
  • E. Kast - Neurochirurgische Universitätsklinik Ulm, Günzburg

Deutsche Gesellschaft für Neurochirurgie. Ungarische Gesellschaft für Neurochirurgie. 55. Jahrestagung der Deutschen Gesellschaft für Neurochirurgie e.V. (DGNC), 1. Joint Meeting mit der Ungarischen Gesellschaft für Neurochirurgie. Köln, 25.-28.04.2004. Düsseldorf, Köln: German Medical Science; 2004. DocP 09.102

The electronic version of this article is the complete one and can be found online at:

Published: April 23, 2004

© 2004 Hübner et al.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License ( You are free: to Share – to copy, distribute and transmit the work, provided the original author and source are credited.




Increasingly spinal image guided surgery is used for the placement of pedicle screws. However high costs and extended operation times result what ends in the question of its necessity. The accuracy of a simple method for the correct finding of the precise screw-entrance point in combination with tactile probing of the screw canal was examined retrospectively.


In 2001 57 patients were transpedicularly stabilised in 1-4 segments without computerised image guided surgery. Indications were fractures, spondylolisthesis, discitis and tumours. 58 screws (25%) were placed in the thoracic, 176 (75%) in the lumbar spine. The position of the screw was found out by computed tomography and classified as ideally, acceptable or displaced which resulted in a surgical revision.


234 screws (96%) were placed perfectly. 3% (7 lumbar and 1 thoracic) were acceptable but not ideal because they perforated the lateral wall of the vertebra or pedicle. 2 thoracic screws crossed the spinal canal followed by surgical revision.


The presented non computerised navigation of thoracic and lumbar pedicle screws is accurate, incorrect screw placement is rare and it impresses by its low costs.