ECE 4600 Group Design Project PROPOSAL Right Heart Catheterization Simulator

Transcription

1 ECE 4600 Group Design Project PROPOSAL Right Heart Catheterization Simulator Group 3 Members: Shelley Burns Brady Russell Supervisor: Dr. Zarah Moussavi Associate Supervisor: Dr. Bertram Unger Submission Date: Monday, October 1,

2 Contents I. INTRODUCTION... 2 II. SPECIFICATIONS:... 2 III. TASKS, MILESTONES and DIVISION OF LABOUR... 4 IV. GANTT CHART... 4 V. BUDGET... 5 V1. REFERENCES... 7 List of Tables Table 1: Milestones, Tasks, and Task Assignments... 4 Table 2: GANTT Chart... 5 Table 3: Proposed Budget

3 I. INTRODUCTION Right Heart Catheterization (RHC) is a medical procedure used to measure the cardiac function in; the blood vessels leading to the heart, the right atria, the right ventricle and the pulmonary arteries. The output from this procedure is the pressure wave corresponding to the location of the catheter. This procedure is done by inserting a Swan-Ganz catheter into an isolated incision in the jugular vein through a Cordis introducer. The catheter is then fed down the vein into the heart. A Cordis introducer is a device that covers the incision and allows the catheter to be fed through. A trained physician utilizes the output from the catheter, in the form of a real time pressure waveform, to gauge the distance to the heart and guide the catheter. The real time waveform is created by feedback from pressure sensors at the tip of the catheter [1]. The Swan-Ganz catheter has a balloon of air at the tip, which is used for floating the device along the vein. The catheter also has temperature and pressure sensors along its length. Measurements are taken by transmitting the pressure through the tubing to a fluid filled pressure transducer [2], the information is processed and the pressure waveform is displayed. In current medical education, there is a need for simulation technology to bridge the gap between theoretical learning and practical application on a living patient. There is a lack of simulation technology for RHC. This proposed simulator will fill that need. II. SPECIFICATIONS: The device will consist of a software program to be run on an instructor s device, a student screen, and a physical box. The setup will be such that all the physical components will be encased in the box, with a corded connection to the instructor s device. The box will have a Cordis introducer attached, into which the student will feed the Swan-Ganz catheter. The insertion of the catheter will turn an encoder which will be used to measure the length of the catheter which corresponds to the distance inserted into the patient. This distance measurement will be used to find the location of the tip of the catheter within the virtual patient. The software components are run on the instructor device. The student screen displays the pressure waveform, heart rate, and blood pressure. The student screen will mimic as closely as possible what a doctor would see when performing a RHC procedure. The instructor screen will also display the pressure wave, heart rate and blood pressure; but will also display a timer for the length of the procedure. The instructor will be in control of the simulation, they will be able to choose various health conditions from a list of options, which will alter the pressure waves from that of a healthy patient. 2

4 The requirements for the physical box are: The software requirements are: Attachment point for Cordis introducer (the device that serves as the insertion point of the catheter). Must be water/fluid resistant up to 90% relative humidity Must feature a sealable drain Must contain the sensing device (optical encoder or rotary encoder, to be decided) Must contain the mechanism for resistance to catheter insertion Is able to contain 70cm of coiled catheter cable The dimensions of the box must be kept under 10cm x 10cm x 6cm, as it will be placed under the simulation dummy s hospital gown. Able to interface with the sensor Compute the distance that the catheter has been inserted from the sensor input within +/- 3mm. Create a healthy response signal based on the calculated location of the catheter within the body Display the response signal on both the student and instructor screens The instructor will be able to select setup options in the simulation, with a minimum of two waveforms, a healthy and distressed option. 3

5 III. TASKS, MILESTONES and DIVISION OF LABOUR Milestone and Tasks Individual Responsible 1) Literature Review -on Swan-Ganz technique Brady & Shelley -on software coding programs Shelley -on power supply Brady -on physical resistance mechanisms Brady & Shelley -on distance measuring components Brady 2) Paper Design -of power supply Shelley -of physical resistance mechanisms Brady -of pseudo-code for software Brady & Shelley -of coil housing Brady -of distance measuring hardware to software Brady & Shelley interface -of distance measuring component circuit Brady 3) Coding -of distance measuring interface Brady & Shelley -of heart waveforms Shelley -of distance dependant resistance Brady & Shelley -of Graphical User Interface Brady 4) SPICE Design & testing -of power supply Shelley -of distance measuring component circuit Brady 5) Breadboard Prototyping, -of power supply Shelley & testing -of distance measuring component circuit Brady -of distance measuring hardware to software Brady & Shelley interface 6) Housing Prototyping -of coil housing Brady & Shelley 7) Assembly of System -coil housing Brady -distance measuring hardware Brady & Shelley -resistance creating mechanism Brady -hardware/software interface connector Shelley 8) Individual System Tests -test output data from hardware Brady & Shelley -verify coil housing meets specifications Brady -verify resistance is created Shelley -verify software achieves the correct Brady & Shelley functionality 9) Integrated System Test -verify that each connection is properly made Brady & Shelley -verify that the system functions as expected Brady & Shelley Table 1: Milestones, Tasks, and Task Assignments 4

6 IV. GANTT CHART Table 2: GANTT Chart March and April are left as fudge time and time for writing the report. 5

7 V. PROPOSED BUDGET The total budget for the project is $200, sponsored by the University of Manitoba. The Swan-Ganz catheter and Cordis introducer were provided by Dr. Unger. This proposed budget contains a representative example of each component to be used, but is subject to change. Component Description Cost (CAD) Encoder Optical encoder part number: $ CBL [3] Power 5V supply wall connection part $8.32 number: EPS P5P [4] Interface TTL 5V to USB part number: TTL- $ R-5V [5] Motor For providing variable resistance part $32.00 number: G0402A Miscellaneous Components Housing materials ~$70 Shipping Digi-Key shipping rate $8.00 Tax $21.36 Total Table 3: Proposed Budget ~$200 Additional available resources: Swan-Ganz Catheter and Cordis provided by Dr. Unger LabVIEW 2011 provided by the University of Manitoba Matlab version 7.10 provided by the University of Manitoba Note: Requires operator console. 6

8 V1. REFERENCES [1] Liu, Alan; Bhasin, Yogendra; Fiorill, Michael; Bowyer, Mark and Haluck, Randy. (2005) The Design and Implementation of a Pulmonary Artery Catheterization Simulator. Uniformed Services University. Bethesda, MD. [2] Paunovic, B MD. Pulmonary Artery Catheterization. (2011, August 3) Medscape Reference. [Online] Available: [2012 September 26]. [3] Digi-Key Corporation. [Online] Available: dksus.dll?wt.z_header=search_go&lang=en&keywords=600cs-nd%20&x=0&y=0&cur=usd [2012 September 30]. [4] Digi-Key Corporation. [Online] Available: dksus.dll?wt.z_header=search_go&lang=en&keywords=t983-p5p-nd&x=0&y=0&cur=usd [2012 September 30]. [5] Digi-Key Corporation. [Online] Available: 232R-5V/ ND/ [2012 September 30]. [6] Digi-Key Corporation. [Online] Available: en/g0402a/ nd/ [2012 September 30]. 7