Patient Transfer Device Final Design Report Team Members: Justin Gearing- Team Leader Dan Miller-BSAC Alex Bloomquist-BWIG Jamon Opgenorth-Communicator Advisor: Prof. Brenda Ogle Client: Dr. Ashish MahajanTable of Contents Abstract………………………………………………………………………………………………….3 Introduction……………………………………………………………………………………………3 Problem Statement…………………………………………………………………………….……4 Design Criteria…………………………………………………………………………………..……5 Background Research………………………………………………………………………………6 EZ Matt…………………………………………………………………………………………6 Suspended Chair Patent………………………………………………………………….6 Allen Board……………………………………………………………………………..……7 Design Alternatives………………………………………………………………………………….8 Final Design: The Patient Transfer Device…………………………………………………8 Design Components……………………………………………………………………..11 Rollers…………………………………………………..……………………………13 End Plates………………………………………………………..…………………14 Rods…………………………………………………………………………………..15 Cover ………………………………………………………………………………..15 L-Hinge………………………………………………………………………………16 Final Design ………………………………………………………………………..………17 Proper Use and Maintenance …………………………………………………….…..………17 Testing………………………………………………………………………………….………………18 Specification Testing………………………………………………………………..……18 Performance Testing…………………………………………………….……………….19 Ergonomics…………………………………………………………………………………………..21 Safety…………………………………………………………………………………………..21 Comfort………………………………………………………………………………………22 Ease of Use………………………………………………………………………………….22 Performance……………………………………………………………………………..…23 Aesthetics..…………………………………………………………………………………..24 Ethical Considerations……………………………………………………………………………24 Future Work……………………………………………………………………………..………….25 Appendix……………………………………………………………………………………..……….27 2 Abstract The goal of our project this semester was to design and fabricate a device that would efficiently transfer sedated patients from the post operation table to a hospital bed. The design had to allow for patients to be transferred while remaining in the semi-fowler position, as certain surgeries require the patient to remain in this position. There are many existing patient transfer devices on the market today, including roller boards, low friction boards, inflatable designs and even motorized patient transfer devices. However, there are currently few devices that are made to accommodate the semi-fowler position. To solve our client’s problem, we designed and fabricated a hinged roller board system with ball bearings and a vinyl cover. This system will effectively replace Dr. Mahajan’s current board, as it efficiently transfers patients in the semi-fowler position as well as on a flat bed. Introduction The main function of a patient transfer device is to assist in relocating a sedated post-op patient from the surgical table to a hospital bed. The current procedure of transferring a patient is fairly simple. First, the hospital bed is pushed next to the surgical bed. Next, a sheet is wrapped around the transfer device. Third, the patient is “log-rolled” on their side and the device is placed under them. A staff member pulls on the sheet that is wrapped around the device and another member pushes the patient. Once the patient has been transferred successfully, they are “log-rolled” again and the device is removed from underneath the patient. This process takes no more than 20 seconds and is done with between four to eight staff members. 3 Figure 1: Dr. Mahajan’s current device is sturdy, safe, reliable and efficient. The designs main flaw is that it is inefficient for use in the semi‐fowler position (Universalmedicalinc.com). The current device that performs this task at the UW hospital is a rigid roller board. Shown in Figure 1, it consists of five rollers that are connected to two endplates. The rollers rotate via bronze pin caps at each end of the rollers. The end plates are connected by two supporting rods that are held together by steel bolts. A vinyl cover is placed over the product to reduce friction as well as maintain the cleanliness of the device. Overall, the device is 30 inches in length, 14 inches in width, and because of the rollers it is one inch high; the rollers are one inch in diameter. Also, the device weighs about 10 pounds. This device is preferred by our client over other devices for a several reasons. The current device is very durable; it has yet to break or malfunction in any way in the four years he’s used it. It is a very simple, compact design. For this reason, not only is it easy to use, but it is also very easy to store. This is a crucial factor when considering the importance keeping the clutter in
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