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In every group, rabbits were subdivided into experimental and control subgroups. 2 Rabbits were bullets injected followed by continuous injected with 13C labeled leucine, glucose, and lactic acid; 3 Blood were drewed before and 150, 160, 170, and 180 min after the initiation of isotopes injection for material analysis; 4 Exhale gas were collected every 5 min in the first 30 min followed by every 30 min there after for material analysis; 5 After centrifuge in low temp the supernatant of the blood samples were collected and went through axon and anon exchange column treatment; 6 Treated blood sample was used for 13C labeled leucine, glucose lactic acid examination through mass spectrograph; 7 The exhale gas was collected for 13CO2 exam through gas-phase mass spectrograph; 8 CO2 total production rate (V13CO2), body various substances production, oxidation speed, and substances metabolic percentage all can be calculated through equations provided by references below; 9 Data was processed through student t test.
分亮氨酸、葡萄糖和乳酸三组各取健康新西兰兔16只,每组再分为高代谢脓毒症组和对照组两部分,建模方法同第一部分;2)三组分别先静脉弹丸式推注再持续灌注13C标记的亮氨酸、葡萄糖和乳酸;3)灌注前抽取动脉血作为背景值,灌注达150,160,170和180min分别抽取动脉血2ml用于质谱分析;4)实验开始后前30min中每5min收集呼出气一次,随后每30min收集呼出气一次,用于气相质谱分析;5)血样经过低温离心取上清液,过阳离子及阴离子交换树脂,再经衍生化处理;6)处理过的血样进入气相色谱-质谱仪,测量其13C标记的亮氨酸、葡萄糖和乳酸丰度;7)实验兔的呼出气通过13CO2气相质谱分析仪测定其中的13CO2丰度(E13CO2);8)利用文献提供的公式算出CO2总生成率(V13CO2)以及机体各物质的通量、氧化速率以及物质代谢百分比等;9)数据分析处理采用t检验。