Acute thermal nerve root injury |
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Authors: | Shinichi Konno Kjell Olmarker Gunnar Byröd Claes Nordborg Björn Strömqvist Björn Rydevik |
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Institution: | (1) Department of Orthopaedics, Sahlgren Hospital, Gothenburg University, S-413 45 Gothenburg, Sweden;(2) Department of Orthopaedic Surgery, Fukushima Medical College, Fukushima City, Japan;(3) Department of Pathology, Sahlgren Hospital, Gothenburg University, Gothenburg, Sweden;(4) Department of Orthopaedic Surgery, University of Lund, Lund, Sweden |
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Abstract: | Summary Bone cement is sometimes used for vertebral body reconstruction following tumor removal. During such procedures, the polymerization of the methyl-metacrylate in the bone cement generates heat. Such temperature increase might cause damage to the nerve roots within the spinal canal. In the present study, pig cauda equina nerve roots were subjected to controlled temperature increases by means of a heat-generating probe. A temperature of 40°C applied for 5 min did not cause any changes in nerve root function. However, 70°C resulted in a complete block of nerve root function within 5 min. Histological nerve fiber damage was seen after exposure to 60°C and 70°C. The present study provides basic knowledge of heat-resistance properties of spinal nerve roots that might be directly applicable as guidelines for safety margins during surgical spine reconstruction procedures using bone cement. |
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Keywords: | Temperature Bone cement Tumor Nerve root Cauda equina Spine |
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