Video Nurse Call System ECE4007 L03 Video Nurse Call System for Recording and Managing Hospital Staff Response Times John Hernandez Craig Johnson Travis Hill Nathaniel Davis Andres Hernandez School of Electrical and Computer Engineering October 16, 2007

Video Nurse Call System ECE4007 L03 School of Electrical and Computer Engineering October 16, 2007 Project Overview Allows patients to notify staff of their needs and records staff response times Communicates through two-way audio and one way video streaming Records staff response times into a database with RFID badges and a bedside reader Provides an inexpensive solution to communication and staff negligence problems in hospitals Unit costs about $3000, but installation costs minimal Video Nurse Call System (ViNCS)

Video Nurse Call System ECE4007 L03 School of Electrical and Computer Engineering October 16, 2007 System Layout

Video Nurse Call System ECE4007 L03 School of Electrical and Computer Engineering October 16, 2007 Objectives Transmit audio at 128 kbps with a maximum delay of 2 seconds Provide video communication at 512 kbps and quality of 320 X 240 pixels Achieve video/audio synchronicity of less than 100 msec Employ a 7 pushbutton interface with discernable commands for different requests Record staff response times into a database with a 134kHz RFID tag and reader Adhere to cleanliness standards and minimal intrusion into the hospital environment

Video Nurse Call System ECE4007 L03 School of Electrical and Computer Engineering October 16, 2007 Technical Approach - Hardware Patient computer: MicroATX single-board Logitech USB webcam with face-tracking capability mounted in ceiling Directional microphone mounted bedside, headboard-mounted speakers Phidgets 134kHz (short-range) RFID reader with bracelet/watch tags Wired connections between peripheral devices & patient computer, patient computer & network for reliability Still need to find/design a waterproof keypad

Video Nurse Call System ECE4007 L03 School of Electrical and Computer Engineering October 16, 2007 Technical Approach - Software Why LabVIEW ? –Advantages: popular in medical industry, hardware and database interfacing, GUI creation, executable creation –Disadvantage: steep learning curve of visual programming Core LabVIEW software components –Embedded event structures inside “while” loops –Sending and Receiving queues –Custom USB interfacing VI’s (RFID, Skype)

Video Nurse Call System ECE4007 L03 School of Electrical and Computer Engineering October 16, 2007 Data Flow Diagram

Video Nurse Call System ECE4007 L03 School of Electrical and Computer Engineering October 16, 2007 Nurse Client GUI

Video Nurse Call System ECE4007 L03 School of Electrical and Computer Engineering October 16, 2007 Database Operations Database implementation for recording staff response times Database operations will be triggered by RFID reader and patient- initiated events Will record request type, patient name, employee ID#, time of request/arrival and response time Prototype LabVIEW solution: write to tab-delimited text file Present design has no explicit need for reading from database, but this can be implemented in LabVIEW if necessary Challenge: allowing write operations from various subroutines

Video Nurse Call System ECE4007 L03 School of Electrical and Computer Engineering October 16, 2007 Streaming Video & Audio Need one-way on-demand video stream from patients to staff Practical solution: Skype VOIP software. Free service, good quality Skype SDK available for LabVIEW, i.e. Skype connections & streaming can be managed from within LV VI’s Concern: minimize delay for reasonable audio & video quality Results of LV/Skype approach: telephone-quality audio & decent video resolution with < 200ms of delay Problem: this approach limits the type of remote device that staff can use (e.g. most PDAs are out)

Video Nurse Call System ECE4007 L03 School of Electrical and Computer Engineering October 16, 2007 Completed and Future Work Completed Tasks –Peripherals interface in Labview –200ms delay in audio/video transmission using Skype –Read/Write database data –Wired and wireless transmission through LabView –Built speakers into headboard Future Tasks –Create a virtual interface that links all the peripherals together –Design an event driven program for the control box –Add timestamp capabilities to the database

Video Nurse Call System ECE4007 L03 School of Electrical and Computer Engineering October 16, 2007 Cost Analysis Parts NeededCost Netgear 10/100 Mpbs Switch$24.99 Waterproof Keypad$23.87 Logitech QuickCam Orbit MP$ RFID reader Kit$67.17 Cyber acoustics Directional Microphone$ oz Magnet Speakers(set of 2)$55.00 HP Monitor$ Microsoft Keyboard and Mouse$50.00 Intel Single Board Computer$ Ethernet Cable$30.00 Labor$30.00 Total$846.01

Video Nurse Call System ECE4007 L03 School of Electrical and Computer Engineering October 16, 2007 Schedule Stream video and audio through a network 09/25 Implement the RFID badge reading system10/25 Implement speaker system10/26 Designing and implementing the patient’s control box 11/06 Develop control box event driven program 11/06 Develop database and RFID software 11/07 Develop virtual interface11/08 Design Validation11/10 MilestonesApp. Completion Date

Video Nurse Call System ECE4007 L03 School of Electrical and Computer Engineering October 16, 2007 Marketing Analysis Development cost: $52,607 Selling price per unit of $3000 assuming an average sale of 300 units per year over a 5 year period Selling price includes materials and labor, fringe benefits, overhead, and sales expense Expected profit and percent profit for each unit sold of $500 and 18.5% respectively

Video Nurse Call System ECE4007 L03 School of Electrical and Computer Engineering October 16, 2007 “Improved communication enhances patient care, decreases length of stay, and most importantly reduces the risk of errors that can result from poor communication between healthcare provider and patient.” -Peter Pronovost, MD, PhD Associate Professor of Anesthesiology and Critical Care Medicine Johns Hopkins University Source: Questions?