Accessible Infusion Pump User-Interface - Biomedical Engineering ...

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There is also a risk of the infusion pump not stopping after the designated time orvolume to be infused. This means that an emergency stop will need to beprogrammed into the interface to send an extra stop signal to the infusion pumpjust in case the normal stop signal doesn’t register.5 Impact of Engineering SolutionsThe optimal design for the Accessible Infusion Pump Interface would greatlyincrease demand for home infusion pumps from biomedical corporations. Themajority of infusion pump users find using the current pump interface tedious,difficult and intimidating. The attractive easy-to-learn nature of the AccessibleInfusion Pump Interface in addition to the relatively low cost of the device wouldallow many new patients to consider undertaking their infusions on the own athome. Not only would the device appeal to patients previously intimidated by,but capable of, operating their own infusion pump, it would allow patients withdisabilities, who formerly would have found it impossible to operate an infusionpump, to take on the task. This would widen the narrow market of direct-topatientdevices sales and could in the end result in more devices becomingaccessible and available on a direct-to-patient basis. This would allowbiomedical corporations to supplement hospital sales and increase profits.Infusion pump problems have occurred related to FDA’s recall of eightColleague models of the medical infusion pump manufactured by BaxterHealthcare Corporation issued in July 19 2005. The devices have been known tohave flaws in their user interface. As a result, the device would allow the user toaccidentally turn off the medical infusion pump when planning to begininfusion. The ON/OFF button of the medical infusion pump is in close proximity tothe START button, thus allowing the accidental powering-off of the device. Suchdefects can be life-threatening to patients and/or users with visual and/orphysical disabilities. About nine people have been seriously injured or killed dueto the medical infusion pump defects. The optimal design for the AccessibleInfusion Pump Interface will eliminate risk accidental turn off due to itsdistinguishable tactile cues and intelligent button placement. If implemented byBaxter Healthcare Corporations, the final device will eliminate the company’saforementioned problems and greatly increase the reliability of their medicalinfusion pump for patients, thus allowing them to increase in market shares in aneconomic perspective.Human error is one problem found with most infusion pumps leading toerroneous delivery of medication, a life-threatening risk. The optimal design willprovide safeguards in verifying the accuracy of the input values through agraphical LCD visual display. In addition, the user interface will be easy to usedue to intuitive ‘walk-through’ software architecture that guides the patient101
through all necessary steps before allowing infusion to start. In turn, the impacton patients will be positive by greatly reducing human error and risk of patientdeath.Alaris® Products have gone through detrimental drawbacks due to their faultyinfusion pumps and lack of following the FDA’s medical device manufacturingregulations in. The FDA seized Alaris Signature Edition Gold infusion pumps,model numbers 7130, 7131, 7230, and 7231 (in August 25, 2006), manufacturedby Cardinal Health Care 303, Inc. The design defect found in these models werecalled key bouncing causing over-infusion since the buttons pressed on thepump are registered twice although the user pressed the key once. Since Alarisdistributed their products globally, the seizure of the devices valued Alaris morethan an estimated $1.8 million. If produced and implemented earlier, the finaldesign would have saved Alaris from their 1.8 million dollar loss and preventingtheir loss of credibility within the media and economic market. If implemented,the device’s impact on Alaris can redeem their credibility in the future since theuser-interface does not experience such key bouncing flaws. Nonetheless,before initiating the infusion, the interface will verify the values through the LCDdisplay. As a temporary solution, Alaris recommended steps in minimizing keyentry errors by requesting an independent double check of pump settings byanother practitioner before starting infusion. By observing these steps, thepatients’ independence and privacy is greatly hindered, whereas the finalinfusion pump user-interface will counter act this feature and increase thepatient’s independence.Despite the positive results for corporations, the most important impact of theoptimal design is on the patients themselves. The Accessible Infusion PumpInterface will allow patients to not only save money, but to regain some of thefreedom claimed by their illness. The accessible nature of the interface will allowpeople who formerly could not reliably operate their own pump to live selfsufficiently. This has a great impact on how a person feels about themselves. Inthe end, the perception of what the limitations on the elderly and ill are couldchange on a societal level allowing the patients to regain any lost dignity.The success of some medical infusion pump companies, such as B. BraunMedical and Curlin Medical, is the expected impact of our final user-interfacedevice after implementation in biomedical infusion pump companies. Thepartnership between the companies has provided “the most dependableinfusion pumps featuring breakthrough safety technology and industry-leadingexpertise”, leading to their “strong growth in market shares and units”. As aresult, the market conditions “created an environment for significant marketgrowth and adoption in hospital and outpatient settings”, providing the“medical community with the highest level of supply and service support,training and technical support”. As a result, the impact of our final user-interfacewill have similar to those found between B. Braun Medical and Curlin Medical.102
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e connected to the microprocessor r
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acket will be mounted directly to t
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Circuit ElementsThe physical link b
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Top Level MenuSetting infusionrates
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misdosages is reduced by forcing th
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Figure 2.1.2.7: Graphic User Interf
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Figure 2.1.3.2: Engineering drawing
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Figure 2.1.3.4: Labview-base Blackf
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Figure 2.2.1.1: Basic Circuit Desig
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Figure 2.2.2.1.2: LCD DimensionsTab
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Figure 2.2.2.2.2: Engineering drawi
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Figure 2.2.2.4.1: Rechargeable Lead
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It is important that operation of t
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Specifications (Note: dimensions in
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Figure 2.2.2.6.2: Bracket top view
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On the casing that will contain the
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Figure 2.2.2.6.9: Casing mounting b
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death. This makes the auditory outp
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Figure 2.2.2.8.1: Basic Circuit Des
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Figure 2.2.2.9.1: Display Screen Fl
Page 51 and 52: Audio Output: “Infusion Rate Inpu
Page 53 and 54: Audio Output: “Flow rate is” Ou
Page 55 and 56: Audio Output: “To start infusion,
Page 57 and 58: Audio Output: “Infusion Rate Inpu
Page 59 and 60: Audio Output: “Flow rate is” Ou
Page 61 and 62: Audio Output: “Infusion starting
Page 63 and 64: Figure 2.2.2.10.2: Labview-base Bla
Page 65 and 66: Figure 2.2.2.11.2: ABS Weld-On glue
Page 67 and 68: Figure 2.2.2.11.6: User Interface U
Page 69 and 70: Figure 2.2.2.12.1: Pump head assemb
Page 71 and 72: 2.2.2.13 Anaheim Automation PCL601
Page 73 and 74: Table 2.2.2.13.1: Specifications fo
Page 75 and 76: Figure 2.2.2.14.2 TM4500 dimensions
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Page 79 and 80: Figure 2.3.3: Opening the Pumping U
Page 81 and 82: Figure 2.3.5: Back Panel Dismounted
Page 83 and 84: Figure 2.3.8: Connecting the Power
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Page 87 and 88: Figure 2.3.13: Two of the Six Bolts
Page 89 and 90: LCD DisplayButtonJoystickFigure 2.3
Page 91 and 92: Figure 2.3.18: Charger and Female C
Page 93 and 94: BatteryFigure 2.3.21: BatteryFigure
Page 95 and 96: Figure 2.3.24: Pumping Unit Connect
Page 97 and 98: Figure2.3.26: DriverTesting of the
Page 99 and 100: "strand” the user.• Give users
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Page 105 and 106: Adding new components has brought w
Page 107 and 108: The next step was creating the all
Page 109 and 110: With the integration of a colored L
Page 111 and 112: http://www.metalsdepot.com/products
Page 113: 12 Appendix12.1 Updated Specificati
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