本文目录：
s-carl工作原理
最佳答案：
# 产生脉动血流
CARL系统包含两个对角泵，这两个泵可产生脉动血流，从而产生更高的再灌注压力，有助于改善血流动力学能力，恢复毛细血管流动面积，抵消无复流现象，特别是对大脑的血流改善有重要意义，进而改善神经系统的结果。从体外循环开始，利用这两个泵建立脉动，并可维持长达60分钟或直到患者的原生心脏功能恢复。
# 调节体温
CARL系统配备了冷却装置，即移动式低温装置，它通过尿素在水中的吸热溶解，能在几分钟内将温度冷却至4?C。在再灌注过程中，可以在进入泵后20-30分钟内将目标温度降至32-34?C，潜在地限制缺血后对活体细胞的损害。
# 改变血液代谢状态
CARL系统通过启动溶液和血气分析添加或减少底物来改变循环血液及其代谢状态，从而提供可控的再灌注。启动溶液为1000ml，含96g甘露醇、15.3g枸橼酸和8.5g氯化镁。
# 调整血液渗透压
在应用的初始阶段，CARL系统通过预处理溶液引入一组选定的渗透活性物质来调整血液的粘度，采用高渗方法对抗脑水肿，促进血管内皮细胞的消肿，促进水分从内细胞中排出，并且高渗性还能减少对血管加压药的需求。
# 调节钙水平
缺血和再灌注会增加细胞内钙浓度，导致细胞水潴留和肿胀等不良后果。在CARL疗法中，会将钙螯合剂枸橼酸钠添加到灌注液中，在开始控制再灌注时将钙水平调节至较低值约15分钟，以避免细胞水肿等问题，但不会长期维持低血清钙水平，防止扰乱止血并促进心律失常和血管扩张的发生。
# 监控与调节
控制单元负责监控泵和整个再灌注过程。血路管路配备有光学传感器用于进行扩展静脉血气分析，以及压力测量传感器用于确定静脉管路压力等，氧合器可连接到便携式氧气控制器等装置，动脉管路中设有流量测量传感器，用于监测和调节灌注流量，以实现对整个再灌注过程的精确控制。
这个小故事告诉我们做事要注意时间的英文是什么意思
这个小故事告诉我们做事要注意时间This little story tells us that we should pay attention to the time.
用英语描写狮子的,特点,颜色写完英文要翻译。
A puma at large 逃遁的美洲狮Pumas are large, cat-like animals which are found in America. When reports came into London Zoo that a wild puma had been spotted forty-five miles south of London, they were not taken seriously. However, as the evidence began to accumulate, experts from the Zoo felt obliged to investigate, for the descriptions given by people who claimed to have seen the puma were extraordinarily similar.
The hunt for the puma began in a small village where a woman picking blackberries saw a large cat only five yards away from her. It immediately ran away when she saw it, and experts confirmed that a puma will not attack a human being unless it is cornered（adj.被困得走投无路的）. The search proved difficult, for the puma was often observed at one place in the morning and at another place twenty miles away in the evening. Wherever it went, it left behind it a trail of dead deer and small animals like rabbits. Paw prints were seen in a number of places and puma fur was found clinging to bushes. Several people complained of cat-like noises at night and a businessman on a fishing trip saw the puma up a tree. The experts were now fully convinced that the animal was a puma, but where had it come from ? As no pumas had been reported missing from any zoo in the country, this one must have been in the possession of a private collector and somehow managed to escape. The hunt went on for several weeks, but the puma was not caught. It is disturbing to think that a dangerous wild animal is still at large in the quiet countryside.
美洲狮是一种体形似猫的大动物，产于美洲。当伦敦动物园接到报告说，在伦敦以南45英里处发现一只美洲狮时，这些报告并没有受到重视。可是，随着证据越来越多，动物园的专家们感到有必要进行一番调查，因为凡是声称见到过美洲狮的人们所描述的情况竟是出奇地相似。
搜寻美洲狮的工作是从一座小村庄开始的。那里的一位妇女在采摘黑莓时的看见“一只大猫”，离她仅5码远，她刚看见它，它就立刻逃走了。专家证实，美洲狮非被逼得走投无路，是决不会伤人的。事实上搜寻工作很困难，因为常常是早晨在甲地发现那只美洲狮，晚上却在20英里外的乙地发现它的踪迹。无论它走哪儿，一路上总会留下一串死鹿及死兔子之类的小动物，在许多地方看见爪印，灌木丛中发现了粘在上面的美洲狮毛。有人抱怨说夜里听见“像猫一样的叫声”；一位商人去钓鱼，看见那只美洲狮在树上。专家们如今已经完全肯定那只动物就是美洲狮，但它是从哪儿来的呢？由于全国动物园没有一家报告丢了美洲狮，因此那只美洲狮一定是某位私人收藏豢养的，不知怎么设法逃出来了。搜寻工作进行了好几个星期，但始终未能逮住那只美洲狮。想到在宁静的乡村里有一头危险的野兽继续逍遥流窜，真令人担心。
