Abstract
There are several advantages to using portable disposable infusing devices (Syrinjector®). First, the initial costs of introducing their devices are very low and are paid by health insurance in Japan. Second, their mechanism is so simple that it is easy to educate medical staff members and patients on management of their devices. Therefore, misapplication of them is rare and it is not necessary to collect their waste devices. There are some disadvantages of portable disposable infusing devices, such as they have no recording or alarm systems. It is not variable to fine infusing dose in comparison with electric mechanical pumps. However, Syrinjector® in particular has the advantages that its residual volume can be accurately and its button easily pushed for patient-controlled analgesia. Syrinjector® has also the disadvantage of having a small reserved volume, but it has the advantage of having a light weight load on the patient.
