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A. Michalek-Sauberer, M. J. Oehmke, G. Scharbert, K. Neumann, S. A

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Presentation on theme: "A. Michalek-Sauberer, M. J. Oehmke, G. Scharbert, K. Neumann, S. A"— Presentation transcript:

1 Withdrawal forces of lumbar spinal catheters: no dependence on body position 
A. Michalek-Sauberer, M.J. Oehmke, G. Scharbert, K. Neumann, S.A. Kozek-Langenecker, E. Deusch  British Journal of Anaesthesia  Volume 100, Issue 6, Pages (June 2008) DOI: /bja/aen086 Copyright © 2008 British Journal of Anaesthesia Terms and Conditions

2 Fig 1 Withdrawal force measurement of the spinal catheter by a tension spring balance with a drag indicator calibrated to Newton (N). (a) Indicator and drag indicator were set to 0 N. Calibration to 0 N is done by turning the set screw on the top of the tension spring balance. (b) The spring balance was clamped to the spinal catheter and a constant retraction force was applied. (c) The maximum force needed for removal of catheter was read off the drag indicator. British Journal of Anaesthesia  , DOI: ( /bja/aen086) Copyright © 2008 British Journal of Anaesthesia Terms and Conditions

3 Fig 2 Withdrawal forces of lumbar midline continuous spinal catheters in sitting or flexed lateral positions. The boxes in the box-whisker plot indicate median and first to third quartile; the bars show smallest to largest non-outlier observation. Circles and asterisks mark outliers and extreme outliers. British Journal of Anaesthesia  , DOI: ( /bja/aen086) Copyright © 2008 British Journal of Anaesthesia Terms and Conditions

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