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JoVE Encyclopedia of Experiments
Neuroscience
在大鼠幼崽中产生大脑中动脉闭塞以诱导局部脑缺血
在大鼠幼崽中产生大脑中动脉闭塞以诱导局部脑缺血
Encyclopedia of Experiments
Neuroscience
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Encyclopedia of Experiments Neuroscience
Generating a Middle Cerebral Artery Occlusion in a Rat Pup to Induce Local Brain Ischemia

在大鼠幼崽中产生大脑中动脉闭塞以诱导局部脑缺血

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05:12 min
July 8, 2025
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Please note that some of the translations on this page are AI generated. Click here for the English version.

Transcript

从加热垫上固定的麻醉幼鼠开始。

用乙醇和聚维酮碘交替对颈部区域进行消毒。在切口部位进行局部麻醉。

做一个颈椎切口,露出颈总动脉。

放置牵开器以确保清晰的通道。

识别颈内动脉或 ICA 并去除周围组织。

在 ICA 的底部系上一条结扎线并将其缩回以暂时停止血流。

在 ICA 上放置松散的第二根结扎线。

在连字之间做一个切口。

取一根涂有硅胶的尼龙闭塞缝线,将其穿过切口插入,直到到达大脑中动脉或 MCA。

这会阻止流向 MCA 的血液,诱发大脑局部缺血。

将结扎线系在咬合缝线上以固定它。

关闭切口部位。在进一步研究之前让幼犬康复。

根据批准的方案使用吸入异氟醚麻醉幼犬后,确保对脚部挤压没有反应。在手术阶段下使用加热垫保持体表温度。用胶带将动物固定在仰卧位,横跨肩部区域。

使用无菌棉签用 70% 乙醇擦拭颈前区域,然后用聚维酮碘溶液拭子擦拭。接下来,将 0.25% 布比卡因局部浸润到计划的切口部位。然后,在通过立体镜工作的同时,在颈椎前部切开 5 至 7 毫米的中线切口,以暴露颈总动脉。

放置 2 到 4 个牵开器以保持腔体开放和动脉暴露。接下来,找到颈内动脉、枕动脉和颈外动脉。去除动脉上的结缔组织和脂肪以获得清晰的视野。

剪下1.5厘米的6-0丝编织缝合线后。解开缝合线,拉出单股。确保单股整齐且没有磨损。

用 45 度镊子握住缝合线的同时,在 ICA 下方以弧形扫过镊子,使尖端出现在 ICA 和 OA 之间。接下来,抓住缝合线的末端并拉动它,使末端易于接触。从镊子上松开股线,并将镊子从 ICA 下方取出,反转之前的运动。

在

ICA 周围最靠近它与 CCA 分开的位置的底部系上一条临时结扎线。小心地横向缩回 ICA,然后使用夹子将缩回线固定到切口对面腋窝区域附近的多余皮肤上。在进行下一步之前,确保缩回的股线足够拉紧以停止血流。

动脉应平坦且苍白。使用 45 度镊子抓住另一根未编织的缝合线,然后像以前一样将其绕在 ICA 下方和周围。将此股线放置在回缩股的侧面。

然后切开0.2毫米的动脉切开术,在系结扎线和解开结扎线之间,靠近系结扎线。现在,使用公制尺测量 10 毫米的硅胶涂层尼龙缝合线作为闭合缝合线。以 2 至 3 毫米的额外余量剪断缝线,以便在再灌注期间移除。

用45度镊子握住咬合缝合线,用直镊子弯曲,标记前进的停止点。将闭塞缝合线送入动脉切开术,使其平行于 ECA 并朝向头部。平稳地推进缝合线,直到达到弯曲处。然后使用位于回缩股外侧的股线系上临时结扎线以固定闭塞缝线。取下卷收器夹。然后修剪两根临时结扎线的股线,留下用于去除结的股线比用于收紧结结的股线更长。拆下卷收器。并使用 6-0 编织丝闭合空腔,形成三到四根间断缝合线。

将

幼犬从麻醉中取出,并将其放在室内空气中的加热垫上。监测幼崽,直到它恢复足够的意识以保持胸骨卧位,并确保它在将其放回大坝之前完全恢复。

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