单通道离体微血管张力测定系统 – 320A用于测量直径30微米至3毫米范围内的离体微血管。两根不锈钢金属丝穿过离体微血管管腔,两根金属丝分别被系在固定架两端。固定架一端连接微螺旋尺,拉伸控制微血管周长;另一端连接在张力换能器上,实时测量微血管收缩舒张时的张力变化。
样本浸没在10毫升的耐酸不锈钢浴槽内,浴槽配置有浴槽盖,浴槽盖上有通气、进液、排液接口。浴槽底部有一个玻璃窗口,浴槽放置在倒置显微镜上可进行荧光观测。 浴槽可加热至37℃生理温度,维持通气的情况下,样本可维持活性最长达12小时。 微血管样本固定后通过微螺旋尺拉伸微血管至最适初始预张力。实验过程中血管周长维持不变,添加血管活性药物至浴槽内,血管经历等长收缩,张力换能器实时测量收缩舒张过程中的张力变化。 可配置一个电磁阀连接微型台式真空泵,方便地控制浴槽排液。 主机内置触摸屏,操作简单。 MyoDAQ 采集软件用于收集数据。整个实验过程中在单个或多个通道中添加多个数据选择。可选择部分或整个数据文件导出数据,以进行外部图表或自定义分析。 |
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