T Nakajima

Publications (1)0 Total impact

• Article: [Intrathecal baclofen therapy for spastic paraparesis due to aortic dissecting aneurysm; recent progress in treatment strategy].

  T Nakajima, H Akagawa, T Ochiai, M Hayashi, S Goto, T Taira, Y Okada
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  ABSTRACT: A 48-year-old man suffered from acute dissection of thoracic aortic aneurysm which eventually led to replacement of the ascending aorta with a tube graft. During this clinical course, circulatory failure in intercostal artery resulted in spinal cord infarction followed by moto-sensory disturbance below Th7 dermatomic area. Seven months later, spasticity with pain in both lower extremities became conspicuous that was uncontrollable by any oral medication. Eventually the patient underwent the implantation of continuous infusion pump for intrathecal baclofen therapy (ITB). The clinical condition was remarkably improved and now has been well controlled. ITB, authorized by Japanese Ministry of Health Labour and Welfare in 2006, has notable therapeutic effects on spasticity derived from any sort of central nervous disorder. More promotive enlightenment if ITB is indispensable for enhancement of its medical benefit in Japan.
  Kyobu geka. The Japanese journal of thoracic surgery 11/2009; 62(12):1039-42.
• Article: Method of abnormality detection of oxygen concentration sensor

  T. Mieno, T. Nakajima, Y. Okada, N. Oono
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  ABSTRACT: This patent describes a method for controlling an air/fuel ratio of the intake air-fuel mixture of an internal combustion engine provided with an oxygen concentration sensor at the exhaust system thereof, the sensor including a sensor unit having oxygen pump and sensor cell elements forming a gas diffusion central region therebetween into which the exhaust gas is supplied, voltage supply means for supplying a pump voltage determined in accordance with deviation of a sensor voltage appearing across the sensor cell element from a reference voltage so as to maintain the sensor voltage at the reference voltage, and signal generating means for generating an oxygen concentration signal varying with a pump current flowing through the oxygen pump element, the method comprising: setting a target air/fuel ration in accordance with the load of the engine; determining an air/fuel ratio control valve in accordance with an engine operating conditions of the engine while comparing the oxygen concentration signal with the target air/fuel ratio; controlling the intake air/fuel ratio in accordance with the air/fuel ratio control value; detecting an appearance of a sensor value normally indicative of a rich condition in which the sensed intake air/fuel ratio is within a rich region; comparing the sensor voltage with the reference voltage; and determining an abnormality of the oxygen concentration sensor according to when the sensor voltage is lower than the reference voltage upon detection of the rich condition in the step of detecting.