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

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The impact of our device on biomedical companies with faulty pumps willprovide dependable infusion pumps with great safety and accuracy in inputvalues. In turn, the growth of the company will be substantial, leading to furtherexcellence in product service and support, increase in job opportunities of fieldstaff service representatives, and production capacity expansion.Baxter Healthcare Corporation, and Alaris® Products are one of manycompanies, which the final user-interface can greatly impact. Any biomedicalcompany experiencing flaws within their engineering design are inevitably toexperience financial and integral setbacks. Implementation of the final design isbound to bring any solution to the pump’s problems. Nonetheless, successesfound by B. Braun Medical and Curlin Medical, are sure to be the consequencesof the impact of our final user-interface device upon applying to biomedicalcompanies with infusion pump problems; such as, Baxter and Alaris. Thus, theimpact of this device will be paramount.6 Life-Long LearningEven in its early stages, it was clear that this project will foster new learning out ofnecessity. In engineering, classroom learning is essentially a survey. One musttake in many different concepts and theories so that one understands what isavailable and understood in the world at large. This knowledge is then drawnupon specifically when one takes on a design project. Things that were not clearbefore must be further researched and learned as there is no partial credit indesign: the design operates, or it does not.One thing that has already been discovered is the immense wealth of humanexperience students have at their disposal on campus. When staring at thelooming façade of what seems an insurmountable challenge, simply discussingthe basics with a faculty member can bring about new enthusiasm. A few ideastossed off the top of a much more experienced person’s head can serve asstarting grains upon which the young engineer can begin to build the designconcept.This project is intensely electrical. Interfacing with a commercial device, possiblywithout the aid of a preexisting serial port, presents many challenges. In thisgroup, no one is particularly strong in bioinstrumentation, but it is clear that thisstrength will be developed. Foreseen challenges include programming amicroprocessor and designing and writing a graphic user interface in assemblycode. There will surely be more as the circuit gains complexity. The protocols ofthe infusion pump must be analyzed in order to ensure proper interfacing isaccomplished.103
Adding new components has brought with it more material to learn. Blackfinchips can be programmed with LabVIEW programs. This simplifies the oncetedious act of programming a microcontroller, but difficulties persist. Themicrocontroller is the heart of the design, and it must be properly programmedfor the various elements of the interface to function with each other. A Blackfinchip lab was attended in order to gain the base of knowledge necessary tobegin writing the embedded program.When using an existing technology such as the Baxter pumping mechanism,much of the difficultly comes from having to reverse engineer to use its features.By communicating directly with the technicians from Baxter, the complicatedfunctions are easier to understand and integrate into a new system. Also, byobtaining and analyzing the information provided within the service manual, theexact function of every part can be broken down into its simplest components.This method allows the product to be broken down into exactly what our groupwill need. From this point a new device can be created with much better resultsfor patients with disabilities.However, despite the technical support available, a significant amount ofreverse engineering will be required in order to ensure that the interface mesheswith the pump assembly properly. Using the operations manual in tandem withanalytical thinking and tools such as multimeters, the existing infusion pump canbe analyzed so that the microprocessor will properly accept and send signals toensure proper operation.Tying a DC battery and an AC power source into the same device presents newchallenges. Transistors will become key in isolating the individual power sources,but maintaining uninterrupted operation in the event that AC power is removed.Looking into other design recalls, it has become obvious how the simplest thing,overlooked, can result in disaster. In the design of an infusion pump, somethingas simple as placing the on/off button too close to the start button lead to theunit powering down when infusion was meant to start. Taking this as a lesson, ithas become clear that no matter how entrenched in details one becomes, onemust be able to step back and consider the big picture in terms of the end goal.7 BudgetThe budget for this design project is well below the $2000 maximum. There wereonly a few purchases that were unneeded and they didn’t affect the overallbudget much. These pieces include the original color LCD screen that wasn’table to display our labVIEW front panel, and the clear basketball case that was104
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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
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Audio Output: “Infusion Rate Inpu
Page 53 and 54: Audio Output: “Flow rate is” Ou
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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
Page 77 and 78: The interface must also be evaluate
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
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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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