Portable and passive miniaturized pump for drug infusion

静脉内重力泵用于输送重要的体液（血液、盐水等）和高风险药物。这些输注泵由安装在杆上的含有样品流体的输注袋组成。虽然这些重力泵用于医院、家庭护理机构和急救车辆，但它们具有操作限制。泵必须安装在相对于患者升高的高度处，以确保输送稳定量的液体。升高的高度产生负责迫使流体流出的压力。输液袋高度的任何变化或患者的移动都会改变正在输送的液体量。这不适用于安全施用小体积的化学品/药物用于药物治疗，并且可能对患者造成严重后果，甚至死亡。克服这种限制的商业自动化泵非常昂贵，并且总是需要外部电源。这使得使用

Intravenous gravity pumps are used to deliver vital body fluids (blood, saline, etc) and high risk medication. These infusion pumps consist of an infusion bag containing the sample fluid mounted on a pole. Although these gravity pumps are used in hospitals, home care settings and emergency vehicles, they have operational limitations. The pumps must be mounted at an elevated height relative to the patient to ensure that a stable amount of fluid is delivered. The elevated height creates the pressure responsible for forcing the fluid out. Any change in the height of the infusion bag or movement of the patient would change the amount of the fluid that is being delivered. This is not suitable for the safe administration of small volumes of chemical/drugs for medication and can cause severe consequences to the patient, even death. Commercial automated pumps that overcome this limitation are very expensive and always require an external power source. This makes the usage