To investigate the protective effect of propofol on ischemia/reperfusion induced spinal cord injury in rabbits and its influence on excitatory amino acid (EAA). Methods Sixty New Zealand white rabbits weighing 2.0-2.5 kg, half males and half females, were selected. The infrarenal circumaortic clamping model was used. And 6 mL/kg different fluids were continuously infused through a catheter into the aorta distal to the clamping site at a speed of 12 mL/(kg•h) during the 30 minutes ischemia period. According to the different infusing l iquids, the rabbits were randomized into 6 groups(n=10 per group): group A, normal sal ine; group B, 10% intral ipid; group C, propofol 30 mg/kg; group D, propofol 40 mg/kg; group E, propofol 50 mg/kg; group F, propofol 60 mg/kg. At 0, 6, 24, and 48 hours after reperfusion, neurologic outcomes were scored on a Tarlov scale system. At 48 hours after reperfusion, the number of normal neurons in the anterior spinal cord was counted, and concentration of EAA in the lumbar spinal cord was measured by high performance l iquid chromatography. Results The neuroethological score was better in groups C, D, E and F than that of groups A and B (P lt; 0.05), the score of group E was the highest (P lt; 0.05), and there was no significant difference between group A and group B (P gt; 0.05). The number of normal neurons in the anterior spinal cord of groups C, D, E and F was greater than that of groups A and B (P lt; 0.05), and group E was greater than groups C, D and F (P lt; 0.05). The concentration of EAA in groups A, B, C, D, E and F was greater than that of normal tissue, the group E was the lowest (P lt; 0.05), the groups A and B were the highest (P lt; 0.05), and there was no significant difference between group A and group B (P gt; 0.05). Concentrations of glutamate and aspartic acid were negatively correlated to normal neuron numbers in the anterior spinal cord and neuroethological scores 48 hours after reperfusion, and the corresponding correlation coefficient was — 0.613, — 0.536, — 0.874 and — 0.813, respectively (P lt; 0.01). Conclusion Propofol can significantly inhibit the accumulation of EAA in spinal cord and provide a protective effect against the ischemia/reperfusion injury induced spinal cord in rabbits.
Objective To investigate the clinical features and prognosis of acute isolated corpus callosum infarction. Methods The clinical and imaging data of patients with acute isolated corpus callosum infarction diagnosed in the Department of Neurology of Beijing Geriatric Hospital and the Department of Neurology of China-Japan Friendship Hospital from February 2017 to February 2021 were retrospectively selected. Patients were divided into groups according to infarction location, infarction size and prognosis. According to the infarction location, the patients were divided into single-site lesion group and multi-site lesions group. According to the infarction size, the patients were divided into large lesion group and small lesion group. According to the prognosis, the patients were divided into good prognosis group and poor prognosis group. The clinical characteristics, etiology and prognosis of these diseases were observed and analyzed. Results A total of 52 patients were included. Among them, there were 32 males (61.5%) and 20 females (38.5%), with an average age of (65.4±7.1) years. The most common risk factors were hypertension (44 cases, 84.6%), hyperlipidemia (32 cases, 61.5%), and diabetes (28 cases, 53.8%). The most common infarction site was splenium in the single-site lesion group (24 cases, 46.2%). The vast majority of patients (92.3%) had nonspecific clinical symptoms, and only 4 (7.7%) had corpus callosum disconnection syndrome. In the TOAST etiological classification, Large-artery atherosclerosis (LAA) was the most common (25 cases, 48.1%), followed by small-artery occlusion (14 cases, 26.9%), the responsible vascular lesions were the most common in the P1/P2 segment of posterior cerebral artery (10 cases) and the A1/A2 segment of anterior cerebral artery (9 cases). There was no significant difference in etiology between the groups with different infarction location and the groups with different infarction size (P>0.05). Forty-four cases (84.6%) had a good prognosis, and 8 cases (15.4%) had a poor prognosis. Combined with multiple risk factors, multiple involvement of lesions and large infarction size were associated with poor prognosis (P<0.05). Conclusions Acute isolated corpus callosum infarction is a rare type of ischemic stroke, with the most common involvement of splenium. Its clinical manifestations are mostly nonspecific, and a few may be manifested as disconnection syndrome. The etiology is mostly LAA, and the overall prognosis of such patients is good, and the poor prognosis may be related to the combination of multiple risk factors and the wide range of infarcts.
Objective To explore the effect of chloral hydrate on sleep Electroencephalogram (EEG) in children. Methods A total of 250 children under the age of 5 underwent EEG examination in West China Second University Hospital from Nov.8, 2019 to Sep.1,2021 were enrolled and divided into medication group or non-medication group according to whether they took chloral hydrate before the examination. Among them, 167 patients, the average age of whom was (30.78±17.43) months, were in the medication group, with a male to female ratio of 113:54. 83 cases were in the unmedicated group, the ratio of male to female was 60:23, and the average age was (33.12±17.10) months. There were no statistical difference in age and gender between the two groups. Quantitative EEG method was used to compare and analyze the percentages of the power of various EEG waveforms in the two groups. Results The proportion of EEG beta waves in the medication group was (2.76±4.03)%, and the proportion of EEG beta waves in the non-medication group was (1.59±1.21)%. There was a significant difference between the two groups. The proportion of sleep EEG beta waves in the medication group is higher. Conclusions Chloral hydrate may cause the increase of β fast waves in sleep EEG, which may affect the interpretation of EEG and the diagnosis of diseases.