Utsuki Satoshi, Shimizu Satoru, Oka Hidehiro, Suzuki Sachio, Fujii Kiyotaka
Department of Neurosurgery, Kitasato University School of Medicine, Sagamihara, Kanagwa, Japan.
Neurol Med Chir (Tokyo). 2006 Aug;46(8):405-7. doi: 10.2176/nmc.46.405.
A 7-year-old girl presented in semicomatose condition. She had received a ventriculoperitoneal shunt using a Codman-Hakim programmable valve. Head computed tomography demonstrated hydrocephalus and head radiography showed that the pressure setting of the shunt valve had changed to 60 mmH(2)O from 40 mmH(2)O. The pressure setting was returned to 40 mmH(2)O, and she was discharged because her clinical symptoms and hydrocephalus improved. One month later, she lost consciousness again and was transported to our hospital. Hydrocephalus and shunt valve pressure of 50 mmH(2)O were noted, and the pressure setting was returned to 40 mmH(2)O again. She was discharged without complications. We suspected that the valve pressure was caused by close contact with a television, because the patient tended to touch a television with her head during play. The valve pressure did not change after the television was placed on a high stand out of reach. We should recognize that there are many sources of weak magnetic fields that may influence a programmable valve in everyday life.
一名7岁女孩呈半昏迷状态就诊。她曾使用Codman-Hakim可编程阀门进行脑室腹腔分流术。头部计算机断层扫描显示脑积水，头部X线检查显示分流阀的压力设置已从40 mmH₂O变为60 mmH₂O。压力设置恢复到40 mmH₂O，由于她的临床症状和脑积水有所改善，她出院了。一个月后，她再次失去意识并被送往我院。发现有脑积水且分流阀压力为50 mmH₂O，压力设置再次恢复到40 mmH₂O。她出院时无并发症。我们怀疑阀门压力是由于与电视机密切接触所致，因为该患者在玩耍时倾向于用头部触碰电视机。将电视机放置在够不着的高处支架上后，阀门压力没有变化。我们应该认识到，在日常生活中有许多弱磁场源可能会影响可编程阀门。
