Holder-Pearson Lui, Lerios Theodore, Chase J Geoffrey
Centre for Bioengineering, University of Canterbury, New Zealand.
HardwareX. 2021 Sep 25;10:e00234. doi: 10.1016/j.ohx.2021.e00234. eCollection 2021 Oct.
A 3D-printed three/two-way valve compatible with respiratory circuits is presented. It is actuated by a servo motor (HXT12K), which is able to be controlled by any PWM-capable micro controller. The valve sufficiently isolates respiratory circuits to deliver fully customisable mechanical ventilation breathing cycles, with differences in driving and end-expiratory pressures of up to successfully demonstrated. It is suitable for multiplexing ventilators for in-series breathing, or providing separate ventilation to each individual lung in a single patient. Each switching valve costs approximately $16USD, $10 of which is the servo motor which can be reused, allowing subsequent devices for only $6USD of 3D printing and common engineering components. The valve has proven reliable for at least 50,000 state changes over at least one month.
本文介绍了一种与呼吸回路兼容的3D打印三向/双向阀。它由一个伺服电机（HXT12K）驱动，该伺服电机能够由任何具备脉宽调制（PWM）功能的微控制器进行控制。该阀能够充分隔离呼吸回路，以实现完全可定制的机械通气呼吸周期，已成功证明其驱动压力和呼气末压力的差异高达 。它适用于串联呼吸的多路复用呼吸机，或为单个患者的每个肺提供单独通气。每个切换阀的成本约为16美元，其中10美元是可重复使用的伺服电机，后续设备仅需6美元的3D打印和普通工程部件。该阀已被证明在至少一个月内至少50000次状态变化中可靠。
