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PubMed · 10254554

Clinical engineering's involvement with a computerized hospital information system.

J R Putnam
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Abstract

This paper describes a computerized Hospital Information System (HIS) installed in Mount Zion Hospital and Medical Center along with the Clinical Engineering Department's involvement in the minor and major maintenance of the 48 data stations consisting of terminals and printers. This paper also includes a summary of maintenance man-hour distribution, data station repair problems and the type of repair equipment and personnel needed to maintain hospital computer systems.

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Biomedical EngineeringCaliforniaComputersHospital Bed Capacity, 300 to 499Information SystemsMaintenance and Engineering, HospitalJournal Article

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J R Putnam. Clinical engineering's involvement with a computerized hospital information system.. https://pubmed.ncbi.nlm.nih.gov/10254554/

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Optimal design of non-Newtonian, micro-scale viscous pumps for biomedical devices.

The present paper addresses the numerical optimization of geometrical parameters of non-Newtonian micro-scale viscous pumps for biomedical devices. The objective is to maximize the mass flow rate per unit of shaft power consumed by the rotor when an external pressure load is applied along the channel that houses the rotor. Two geometric parameters are considered in the optimization process: (i) the height of the channel that houses the rotor (H) and (ii), the eccentricity (epsilon) of the rotor. Three different micro-scale viscous pump configurations were tested: a straight-housed pump (I-shaped housing) and two curved housed pumps (L- and U-shaped housings). The stress-strain constitutive law is modeled by a power-law relation. The results show that the geometric optimization of micro-scale viscous pumps is critical since the mass flow rate propelled by the rotor is highly dependent on epsilon and H. Numerical simulations indicate that mass flow rate is maximized when epsilon approximately 0, namely when the rotor is placed at a distance of 0.05 radii from the lower wall. The results also show that micro-scale viscous pumps with curved housing provide higher mass flow rate per unit of shaft power consumed when compared with straight-housed pumps. The results are presented in terms optimized dimensions of all three configurations (i.e., H(opt) and epsilon(opt)) and for values of the power-law index varying between 0.5 (shear thinning fluids) and 1.5 (shear-thickening fluids).

Biomedical Engineering↗