Biomedical sciences instrumentation
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Medical technologies move from research and development through manufacturing and marketing into the healthcare delivery system. Within the healthcare delivery system, hospitals rely heavily on medical technologies (and the medical devices they enable) to provide diagnosis, treatment, and monitoring in patient care. Managing these devices from acquisition through application in patient care is a formidable task. ⋯ They must do so within a highly regulated and cost-constrained environment. This paper describes the challenges hospitals face and the strategies they employ in their efforts to achieve cost-effective medical technology management. The role of clinical engineering is discussed.
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Mechanical ventilators are routinely used to care for patients who cannot adequately breath on their own. Management of mechanical ventilation often involves a careful watch of the patient's arterial blood-oxygen tension and requires frequent adjustment of ventilation parameters to optimize the therapy. This situation lends itself as a candidate for closed-loop control. ⋯ The results of a small clinical trial indicated that the system maintained control of the patient's therapy nearly 84% of the time. During the remainder of this time, the controller was interrupted primarily for suctioning, PaO2 sensor calibration or replacement. The response of the closed-loop controller was found to be appropriate, reliable and safe in patients with ARDS.