Cited by 319Open Access
Keio University
ORCID: 0000-0002-0085-2057Publishes on Organic Electronics and Photovoltaics, Conducting polymers and applications, Immunotherapy and Immune Responses. 401 papers and 8k citations.
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We have studied the morphometry of the spinal cord in 50 patients with cervical compression myelopathy. Computed tomographic myelography (CTM) showed that the transverse area of the cord at the site of maximum compression correlated significantly with the results of surgery. In most patients with less than 30 mm2 of spinal cord area, the results were poor; the cord was unable to survive. Several factors, such as chronicity of disease, age at surgery and multiplicity of involvement are said to influence the results of surgery, but the transverse area of the cord at the level of maximum compression provides the most reliable and comprehensive parameter for their prediction.
We observed high and persistent spontaneous buildup of the surface potential (SP) upon vacuum deposition of tris(8-hydroxyquinolinato) aluminum(III) (Alq3) on an Au substrate under dark conditions. SP determined by the Kelvin probe method reached 28 V at a thickness of 560 nm and the surface of the Alq3 film was positively charged. We propose a model in which preferential orientation of the dipole moments of Alq3 molecules is the origin of this buildup of the SP. The intensity of second-harmonic generation was also dramatically increased by the deposition of Alq3 under dark conditions, which supports the notion of a buildup of dipole layers. This giant surface potential was almost completely removed by irradiation of Alq3 molecules with visible light, and irradiation during deposition also prevented the buildup of SP.
Neurologic deterioration was analyzed in 110 patients with surgically treated cervical myelopathy secondary to soft disc hernia or spondylosis. Follow-up periods ranged from 2 to 14 years, with an average of 6 years. Of 110 patients, 29 suffered neurologic deterioration. In most of the patients, deterioration occurred within the first year after surgery. Causes of deterioration were divided into three categories: direct trauma to neural tissue during surgery (a preventable complication); instability of the spine, progression of spondylotic changes above or below the level of fusion, and non-union (apparently unpreventable but treatable); and nonsurgery-related accidental trauma (unavoidable and often irreversible). Countermeasures for the deterioration are discussed.