Devices, systems, and methods for detecting fluid flow

A medical device may include a plurality of tines, each of the tines having a sensor configured to detect a flow of fluid; and the sleeve is arranged on the radial outer side of the fork teeth. The cannula may be configured to move proximally and distally relative to the plurality of tines to transition the plurality of tines from a contracted configuration to an expanded configuration. 一种医疗装置可以包括多个叉齿，所述叉齿中的每一个具有传感器，所述传感器被构造成检测流体的流动；以及套管，所述套管设置在所述多个叉齿的径向外侧。所述套管可以被构造成相对于所述多个叉齿向近侧和向远侧移动，以使所述多个叉齿从收缩形态转换至扩张形态。