Designing Devices With the Task in Mind

2013 ◽  
Vol 55 (1) ◽  
pp. 61-74 ◽  
Author(s):  
Sarah Wiseman ◽  
Anna L. Cox ◽  
Duncan P. Brumby
Keyword(s):  
Medical Devices ◽  
Infusion Pumps ◽  
Infusion Devices

Objective: We studied the patterns of digits and numbers used when programming infusion pumps with the aim of informing the design of number entry interfaces. Background: Number entry systems on medical devices are designed with little thought given to the numbers that will be entered. In other fields, text and number entry interfaces are designed specifically for the task that they will be used for. Doing so allows for faster and more accurate interaction. Method: In Study 1, logs were taken from infusion pumps used in a hospital. Information about the numbers being typed was extracted. For Study 2, three common number entry interfaces were evaluated in light of these results to determine which were best suited to the task of programming infusions. Results: There are clear patterns in the numbers being used in hospitals. The digit 0 is used far more frequently than any other digit. The numbers 1,000, 100, and 50 are used in nearly half of all infusions. Study 2 demonstrates that interfaces are not optimized for entering such data. Conclusion: Changes could be made to the design of the number entry interface on infusion pumps, leading to a reduction in the number of key presses necessary to program a device. We offer a set of four heuristics to guide the design of number entry interfaces on infusion devices. Application: Improving the design of the number entry interface of medical devices, such as infusion pumps, would lead to improved efficiency and a reduction in the likelihood of errors.

scholarly journals Use of Continuous Infusion Pumps During Radiation Treatment

2013 ◽  
Vol 9 (2) ◽  
pp. 107-111 ◽  
Author(s):  
Kate Bak ◽  
Eric Gutierrez ◽  
Elizabeth Lockhart ◽  
Michael Sharpe ◽  
Esther Green ◽  
...  
Keyword(s):  
Patient Safety ◽  
Radiation Exposure ◽  
Continuous Infusion ◽  
Radiation Treatment ◽  
Safety Issue ◽  
Infusion Pumps ◽  
Additional Testing ◽  
Infusion Devices ◽  
Patient Safety Issue

The varied results of radiation exposure on infusion devices suggest that additional testing should be carried out to determine the limits of dose exposure, and to raise awareness around this patient safety issue.

Infusion pump informatics approach to quantify impact of alerts and alarms on healthcare delivery

2017 ◽  
Vol 61 (1) ◽  
pp. 681-685 ◽  
Author(s):  
Denny Yu ◽  
Kang-Yu Hsu ◽  
Joon Hong Kim ◽  
Poching DeLaurentis
Keyword(s):  
Patient Care ◽  
Medical Devices ◽  
One Health ◽  
Infusion Pump ◽  
Healthcare Delivery ◽  
Health Practitioner ◽  
Contributing Factors ◽  
Infusion Pumps ◽  
Logistic Regressions ◽  
Current Impact

Infusion pumps are medical devices that deliver medication, fluids, and nutrients in a precise and controlled manner that is critical to patient care. This study proposes using infusion pump informatics on all-infusion datasets to understand current impact of alerts and alarms on patient care and health practitioner workflow. All-infusion datasets contain infusion data for both normal and abnormal use, i.e., error states. Ten months of continuous data was collected from one health institution. Analysis of variance with log-transformation and logistic regressions were used to analysis contributing factors for alerts and alarms states. A total 64,511 minutes of alarm activation were observed, where alarms were active prior to being resolved. Mean resolution times for 83% of alarms were one minute or less; however, 3% or alarms required >4 minutes before getting resolved. Risk factors for infusions with alerts included nursing shift variables. Specifically, odds for alerts were 1.3 times higher for infusions that span across shifts than infusions in the day shift.

Herstellung von medizintechnischen Multifunktionsteilen/Developing an overmolding process producing multi-functional medical products including standard thermoplastics and liquid silicone rubber (LSR)

2021 ◽  
Vol 111 (06) ◽  
pp. 440-445
Author(s):  
Hans-Peter Heim ◽  
Ralf-Urs Giesen ◽  
Mohammad Ali Nikousaleh ◽  
Michael Hartung ◽  
Niklas Riemann
Keyword(s):  
Medical Devices ◽  
Silicone Rubber ◽  
Medical Industry ◽  
Quality Level ◽  
Manual Assembly ◽  
Infusion Pumps ◽  
Medical Products ◽  
Liquid Silicone Rubber ◽  
Liquid Silicone ◽  
Functional Components

Medizintechnische Produkte wie beispielsweise Katheter, Infusionsleitungen oder -pumpen bestehen aus Multifunktionsteilen, die Aufgaben wie Durchfluss-, Dichtungs- und Dosierungsfunktionen erfüllen müssen. Dies erfordert eine Kombination von festen Thermoplasten in Verbindung mit elastischem Silikon. Hier besteht durch eine geeignete Produktionstechnologie, welche die Verarbeitung von Thermoplasten und Silikon kombiniert, das Potenzial, die bisher aufwendige Fertigung und Montage der Einzelkomponenten abzulösen. Eine derartige integrierte Fertigungstechnologie ermöglicht es, leistungsfähige neue Produkte wirtschaftlich zu realisieren und durch die vereinfachte Herstellung zugleich die Produktsicherheit für den Patienten zu verbessern. Im Folgenden steht dabei besonders das Mehrkomponenten-Spritzgießen von LSR und Standardthermoplasten wie etwa ABS (Acryl-Nitril-Butadien Styrol) oder PP (Polypropylen) im Fokus. Nach einer Studie führender Unternehmen und Branchenverbänden hat die Medizintechnikbranche in Deutschland 271 000 t Kunststoffe im Jahr 2019 verarbeitet. [1]   Medical products, like catheters IV-sets or infusion pumps, are built of multi-functional components realizing different product requirements like pressurizing, avoiding leakage of or dosing fluid. These requirements can only be reached by combining properties of hard thermoplastics with elastomeric properties of the silicone rubber. There is high potential regarding process technologies to avoid following assembly steps. The production of single components with just one function and manual assembly will be unnecessary. Process costs will be decreased and quality level will be increased significantly by molding multi-functional components with standard thermoplastics. The following research is focused on the combination of moldable LSR with ABS. According to a study of leading companies in the field of medical devices German medical industry processed 271,000 tonnes of plastics in 2019. [1]

Flow Rate Variability from Selected syringe and Mobile Infusion Pumps

1988 ◽  
Vol 22 (9) ◽  
pp. 687-690 ◽  
Author(s):  
Elizabeth A. Farrington ◽  
Jill C. Stull ◽  
Richard D. Leff
Keyword(s):  
Flow Rate ◽  
Large Volume ◽  
Small Volume ◽  
Rate Variation ◽  
Infusion Pumps ◽  
Pharmacological Agents ◽  
Infusion Device ◽  
Wide Range ◽  
Infusion Devices ◽  
Range Of Variation

Alterations in response to pharmacological agents have been attributed to flow rate variation produced by intravenous infusion devices during drug delivery. A wide range of variation has been shown to occur with large-volume infusion devices. The intent of this investigation was to examine flow variation resulting from the use of selected small-volume syringe and mobile infusion devices and determine whether these devices have greater flow continuity than large-volume infusion pumps. Each syringe and mobile infusion device delivered iv fluid at three flow rates (1, 5, and 10 ml/h). The effusate was collected in a tared beaker and serial weights were measured every ten seconds using a computerized, gravimetric technique. Accuracy, continuity, and pattern of flow were determined for each of the syringe and mobile infusion devices. All of the devices produced accurate flow, within ± 10 percent of the desired 5 and 10 ml/h rates. However, the actual iv flow rate ranged from 53 to 93 percent for the 1 ml/h rate. Continuity and pattern of flow resulting from each device were diverse. When compared with large-volume, microrate infusion devices, no significant differences could be observed. Therefore, no clear advantage to delivering drug solutions on a continuous basis can be expected from the use of small-volume devices. Specific infusion devices may be preferable for certain clinical applications; flow continuity data may be valuable when selecting an infusion device.

Ultrastructural changes in murine lymphoma cells exposed to ultraviolet-A radiation

1991 ◽  
Vol 49 ◽  
pp. 104-105
Author(s):  
Delma P. Thomas ◽  
Dianne E. Godar
Keyword(s):  
Medical Devices ◽  
Blood Cells ◽  
White Blood Cells ◽  
Consumer Products ◽  
Ultrastructural Changes ◽  
Ultraviolet A ◽  
Uv Spectrum ◽  
Lymphoma Cells ◽  
Murine Lymphoma ◽  
Transmission Electron

Ultraviolet radiation (UVR) from all three waveband regions of the UV spectrum, UVA (320-400 nm), UVB (290-320 nm), and UVC (200-290 nm), can be emitted by some medical devices and consumer products. Sunlamps can expose the blood to a considerable amount of UVR, particularly UVA and/or UVB. The percent transmission of each waveband through the epidermis to the dermis, which contains blood, increases in the order of increasing wavelength: UVC (10%) < UVB (20%) < UVA (30%). To investigate the effects of UVR on white blood cells, we chose transmission electron microscopy to examine the ultrastructure changes in L5178Y-R murine lymphoma cells.

Bacterial biofilm behavior in water-supply lines of dental units

1992 ◽  
Vol 50 (1) ◽  
pp. 882-883
Author(s):  
B.D. Tall ◽  
K.S. George ◽  
R. T. Gray ◽  
H.N. Williams
Keyword(s):  
Water Supply ◽  
Medical Devices ◽  
Biofilm Formation ◽  
Bacterial Biofilm

Studies of bacterial behavior in many environments have shown that most organisms attach to surfaces, forming communities of microcolonies called biofilms. In contaminated medical devices, biofilms may serve both as reservoirs and as inocula for the initiation of infections. Recently, there has been much concern about the potential of dental units to transmit infections. Because the mechanisms of biofilm formation are ill-defined, we investigated the behavior and formation of a biofilm associated with tubing leading to the water syringe of a dental unit over a period of 1 month.

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