Disposable infusion pumps can be used in many areas, including home care, PCA, patient-controlled epidural analgesia, continuous peripheral analgesia, continuous epidural analgesia, continuous i.v. The accuracy of each pump’s flow rate is dependent on several factors, including temperature, fluid viscosity, atmospheric pressure, back pressure, partial filling, and storage. There are several types of disposable infusion pumps, including elastomeric, positive-pressure (spring-powered and gas-pressure-powered), negative-pressure (vacuum), and patient-controlled analgesia (PCA) pumps. The pressure generated by disposable pumps on fluid is 250–600 mm Hg, compared with 5–1200 mm Hg of pressure for electric pumps. All nonelectric disposable infusion pumps exploit the same physical principle: mechanical restriction within the flow path determines the speed of pressurized fluid.
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