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腹部小鼠心脏移植模型中的血液回路重建
Chapters
Summary June 3rd, 2021
Please note that all translations are automatically generated.
Click here for the English version.
演示了异位小鼠心脏移植模型中血液回路重建的新技术。
Transcript
小鼠心脏移植是研究异位免疫反应的宝贵模型,引进了小鼠异位心脏移植的新型手术技术。在传统的小鼠心脏移植中,供体主动脉和接受者腹部主动脉为肛门。肺动脉是与接受者低劣的静脉卡瓦的同位素。
在这个新的小鼠心脏移植。供体主动脉是接受者腹部主动脉的肛门,捐赠者在胸腔内劣质静脉卡瓦是接受者低等静脉卡瓦的肛门。现在我们开始实验示范。
将鼠标放入箱中进行异氟烷吸入和麻醉后,称重鼠标。根据小鼠的体重,给麻醉小鼠注射氯胺酮二甲苯丙胺。麻醉发生时,在手术台上修复和消毒鼠标。
将皮肤从颈部切到下腹部。切开腹壁的肌肉,轻轻地将内脏移开。接下来,暴露劣质的维纳卡瓦。
将 0.4 毫升肝素溶液缓慢注射到下静脉卡瓦中,等待一分钟后再拔出针头。拔出针头,用剪刀切开劣质静脉卡瓦和腹部主动脉,加速切除。通过执行 U 形切口打开胸腔。
完全暴露心脏、肺和所有胸血管。暴露胸腔主动脉。切掉一半的流明。
将灌溉管插入胸动脉的开口。切断肺静脉,促进灌溉和排水。注射至少两毫米的四度HTK溶液。
心脏完全停止跳动,直到肺静脉流出完全清晰。拔出灌溉管,分离胸骨。取出胸腺。
轻轻剥去主动脉拱门周围的脂肪。用10个零缝合线暴露和液合动脉脉冲的躯干。分离事实和连接组织附加在触觉内劣维纳卡瓦暴露和石灰与七零缝合的上级静脉卡瓦,并削减它背后的结条。
在主动脉拱门下的心底处做七个零缝合线。劣质静脉卡瓦和两个尿道,然后石灰肺动脉分支和静脉肺血管。尽可能解剖主动脉拱门,但请确保你有一个清晰的流明,没有侧枝的开口。
隔膜附近的连体和触内劣质静脉卡瓦下的肺血管。现在,把心脏从胸口取出。将被喷出的捐赠者的心脏放入4度冷硬盘溶液中,并暂时保存。
一定不要延长冷缺血时间超过60分钟。现在,我们开始演示受体操作。最初的操作步骤与之前显示的供体小鼠类似,包括麻醉和绝育。
腹部皮肤以横向切割的方式。肠道解剖后,用盐水溶液用湿纱布覆盖腹部器官。暴露劣质静脉卡瓦和腹部主动脉,并释放他们从周围的脂肪组织。
如有必要,在肾血管下对侧分支容器进行液化或电化。在大脑上部插入右侧的第一个微止血力,在肾脏血管下方插入主动脉。在大脑和主动脉的下部插入右侧的第二个微止血钳。
主动脉和静脉空间在两个止血钳之间有超过一厘米的动脉瘤和静脉空间。切入主动脉,比上夹更接近下夹。此外,您可以使用 30G 针做一个小孔,并用微型剪刀打开它。
将心脏放入腹腔。主动脉在视觉和静脉卡瓦在另一边,并覆盖它与一个小湿纱布垫。适应和缝合接受者主动脉的捐赠主动脉,开始审计。
打个结,然后用一条运行缝合线到这个切口的顶部,大约四到五针。接下来,将心脏向右翻转,再次盖住它,并继续在左侧的缝合,直到达到结尾和结。使用微型剪刀在接受者的腹部劣质静脉卡瓦上切一个圆孔,该洞应具有与捐赠者的体内劣维纳卡瓦流明相同的大小。
切口应位于计划主动脉解剖的颅骨。使静脉切口大于主动脉切口。冲洗捐赠者的触内劣质静脉卡瓦。
将捐赠者内在性低劣的静脉卡瓦缝制到接受者静脉卡瓦开始。打个结,执行运行缝合,直到切口的顶部达到。使用五针,继续左侧的缝合。
最后,在尾角打个结,小心地拧紧。小心不要拉得太紧。将止血海绵的一小部分放在静脉和主动脉瘤周围。
先取出下部,然后取出上微止血夹,用温暖的0.9%氯化钠冲洗腹腔。取出止血海绵。观察移植心脏的心跳。
如果一切都正确,心脏将再次开始收缩。将肠子放回腹腔,用四个零缝合。为移植的小鼠提供温暖富氧的环境。
在以前的研究工作中,我们报告了总共40例静脉卡瓦和静脉卡瓦的比较,以及40例传统肺动脉静脉腔解剖手术。与传统的肺动脉静脉瘤组相比,静脉卡瓦到静脉卡瓦组血管解剖的手术时间要短得多。小鼠异位性腹部心脏移植手术技术是移植免疫学研究的标准模型。
这里介绍的这种新颖的血液回路重建技术促进了小鼠的腹部心脏移植。这被称为与减少温暖缺血和重新拍打时间的嫁接心脏,从而提高这种模式的成功率。
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