| 摘要 |
The present invention relates to a device for extraction of pins at fixation means for fixation of bone fragments at bone fractures. The fixation means ( 2 ) includes a sleeve ( 6 ) and at least one pin ( 7 ) provided in said sleeve. The sleeve ( 6 ) has at a front end portion ( 9 ) at least one opening ( 10 ) in a longitudinal side thereof. A front part ( 11 ) of the pin ( 7 ) extends, when it is located in an operating position, out of the sleeve ( 6 ) through the opening ( 10 ) and engage bone material of one of the bone fragments ( 3, 4 ). The extraction device ( 1 ) is adapted to pull the pin ( 7 ) in a backwards direction relative to the sleeve ( 6 ) in order to withdraw the front part ( 11 ) of the pin ( 7 ) from bone material of one of the bone fragments ( 3, 4 ) and into the sleeve ( 6 ). The extraction device ( 1 ) comprises means ( 12, 13 , and 14 ) which are provided to draw or pull the pin ( 7 ) backwards relative to the sleeve ( 6 ) without thereby subjecting the pin ( 7 ) to torsional forces in relation thereto.
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