RESUMO
White cord syndrome (WCS) shows high intramedullary signaling in T2-weighted MRI with worsening motor nerve symptoms after cervical spinal decompression surgery. It has been reported in only 13 cases. An 81-year-old man had numbness, weakness, and impaired fine motor control in both upper limbs for the previous five years. C3, C4, C6, open-door laminoplasty, and C5 laminectomy were performed. Intraoperative transcranial motor evoked potential normalization by compound muscle action potential showed an 80% reduction in amplitude in the right abductor pollicis brevis and a 96% reduction in the right abductor hallucis. Tetraplegia occurred immediately after the operation. Magnetic resonance imaging (MRI) on the day after the operation showed intramedullary T2 high signals at the C4 and C5 levels. According to Brunnstrom's staging, the upper and lower right limbs and the lower left limb were at stage two, and the upper left limb was at stage three, six months after the operation. Thirteen cases of WCS have been reported in the literature. These were thought to be caused by reperfusion due to decompression.
RESUMO
BACKGROUND: We previously reported that normalization of motor evoked potential (MEP) monitoring amplitude by compound muscle action potential (CMAP) after peripheral nerve stimulation prevented the expression of anesthetic fade (AF), suggesting that AF might be due to reduced synaptic transfer in the neuromuscular junction. METHODS: We calculated the time at which AF began for each of craniotomy and spinal cord surgery, and examined whether AF was avoided by CMAP after peripheral nerve stimulation normalization in each. Similar studies were also made with respect to the upper and lower limb muscles. RESULTS: AF was observed in surgery lasting 160 minutes for craniotomy and 260 minutes or more for spinal surgery, and 195 minutes in the upper limb muscles and 135 minutes in the lower limb muscles. In all the series, AF could be avoided by CMAP after peripheral nerve stimulation normalization. CONCLUSION: AF of MEP occurred in both craniotomy and spinal cord surgery, and it was also corrected by CMAP after peripheral nerve stimulation. AF is considered to be mainly due to a decrease in synaptic transfer of the neuromuscular junction due to the accumulation of propofol because of the avoidance by CMAP normalization. However, it may be partially due to a decrease in the excitability of pyramidal tracts and α-motor neurons, because AF occurred earlier in the lower limb muscles than in the upper limb muscles.
RESUMO
Igarashi T, Hayashi S, Ogawa K, Matsui S, Nishimatsu T. Relationship between daily rehabilitation time and functional gain in inpatient rehabilitation medicine of hospitalized older adults with subacute stroke. Jpn J Compr Rehabil Sci 2022; 13: 56-63. Objective: Although there have been reports examining the relationship between daily rehabilitation time and functional gain, few have fully considered background factors such as severity of motor paralysis and comorbidities. This study aimed to examine the relationship between the daily rehabilitation time and improvement in functional status, longitudinally in hospitalized older adults with subacute stroke. Method: From the results of the Functional Independence Measure (FIM), we calculated the FIM gain and FIM effectiveness, a measure that is less sensitive to the ceiling effect of FIM. Adjusted for covariates, multiple regression analysis was performed for daily rehabilitation time and FIM gain and effectiveness. Results: This study enrolled 298 hospitalized older adults with subacute stroke (mean age, 78.1 ± 8.1 years, 112 females). The total scores of functional independence measure gain and effectiveness were 31.6 ± 22.5 points and 54.4 ± 35.2%, respectively. There was an association between FIM gain (total score) and total rehabilitation time (ß = 0.29, p < 0.01) and between FIM effectiveness (total score) and total rehabilitation time (ß = 0.22, p < 0.01). Conclusions: Although prognosis after stroke is poorer in older adults than in young adults, this study shows that increased daily rehabilitation time may improve functional status.
