P11022: VAD Reduction of Wired Content for Signal and Power Transmission
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Test Plan

Table of Contents

Note:See attached Document for more details on the following tests

Test Plan

LVAD Simulation Signal Test

Before testing the proposed prototype with the current LVAD set-up, a test simulating signals entering and leaving the designed transceivers will be conducted. Agilent 33120A Function/Arbitrary Waveform Generator will be used to simulate signals entering the device, and HP54602B Oscilloscope will be used to measure the output of the transceivers, and compare it to the input. The goal is to make sure that the signals are processed correctly, and that the propagation delay is within specification. The following signals will be generated and measured:

Materials Needed:

1. HP 54602B Oscilloscope

2. Agilent 33120A Function Waveform Generator

Start Date: __________ Finish Date: _______________ Engineer in charge: ________________________________ Comments: _____________________________________________________________

Electronics Functionality Test

The specifications above will be tested by plugging in the proposed device in two ways for a period of 6 hours to check the functionality of the device. One method is to test functionality of the new electronics with current system components; the second, is to test functionality with the design of the P10021 Senior Design Miniaturization team. To test functionality of the new electronics, we must have access to the current system components’ signals needed to test our design. Required signals are outlined in high-level design schematics and in specifications. Upon collaboration with P10021 Senior Design team, several criteria was agreed upon to allow for testing of both designs simultaneously for a period of 15 minutes. Observations will be made at 5 minute time intervals to ensure that the electronics are working properly, without any need for adjustments.

Equipment Needed:

1. Functional LVAD (provided by Dr. Cheng and Dr. Day)

3. Functioning System

Start Date: __________ Finish Date: _______________ Engineer in charge: ________________________________ Comments: ____________________________________________________________________

Drop Test

To fulfill engineering specifications #33, the drop test is designed to test for damage prevention due to any accidental drops of the outside casing. The inner casing will also be tested by a similar method to ensure that if the package can withstand this type of impact, it can withstand other kinds of unintentional impacts. To simulate best an average fall, a person would drop the casing from a height of 1.5 meters onto a standard concrete surface (Carpeted for internal component), and any damage to the casing will be observed and recorded. If the casing is severely damaged, it shall be redesigned and re-fabricated.

Equipment Needed:

1. Measuring Tape

Start Date: __________ Finish Date: _______________ Engineer in charge: ________________________________ Comments: ____________________________________________________________________

==Pressure and Leak Test This test is designed to== fulfill customer need #14, corresponding to engineering specification #32 and #34, where the casing and the wire connections must withstand slightly higher pressures and be leak resistant under 1 meter of water. The casing and the cables will be submerged in a tank under 1 meter of water, corresponding to pressure of 10 kPa. For this test the electronics will be removed and wire samples will be put in the connectors to simulate the actual wires in place. We will ensure complete submersion, and keep the components underwater for 15 minutes.

Equipment Needed:

1. Water

2. ~1m deep container

Start Date: __________ Finish Date:_______________ Engineer in charge: ________________________________ Are there any visual defects or leaks before and after testing? Yes / No … Yes / No Comments:_____________________________________________________________________

Heat Test

This test is designed to ensure that the heat produced by the electronics dissipated quickly, and in a manner that the surface temperature does not increase by more than 6.4 oC over ambient. Also, the electronics must function properly and should not overheat if the system is implanted into the human body. Simulating internal body fluid condition is a tedious process, therefore, for feasibility reasons; the final product casing will be tested in water for a 3 hour period. A thermocouple will be used to measure temperature of electronics inside the casing and on the surface of the case.

Equipment Needed:

1. Glass Bowl

2. Calibrated Thermocouples (min. three)

3. Hot Plate

4. Water

5. Thermometer

6. Functioning System

Start Date: __________ Finish Date:_______________ Engineer in charge: ________________________________ Are there any visual defects before or after testing? Yes / No … Yes / No Comments:___________________________________________________________________

Flexibility Test-Bend Radius

The following test is designed to compare the cable used to control the LVAD. The test will compare the current cable and all three sample cables obtained from our vendors. The current cable consists of 32 wires bundled into a stainless steel cable covered with a Loctite 5248 Alcoxy Silicone. The bend radius will be determined for individual cables. The bend radius, which is measured to the inside curvature, is the minimum radius that one can bend a cable without kinking it, damaging, or shortening its life.

Equipment:

1. Cone Fixture

2. C-clamp

3. Steady Table

4. Current Cable three 6’’ samples

5. New Cable three 6’’ samples

System Schematic:

Bending Schematic

Flexibility Test- Stiffness

This test is designed to quantify the stiffness of each cable using two methods. The test design is applying a constant force on all the cables and measuring the deflection. The second test design is using the Taber Stiffness testing from the RIT Packaging Science Materials Laboratory.

Equipment:

1. C-clamp

2. Steady Table

3. Measuring Tape

4. Spring Scale (small)

5. Current Cable three 4’’ samples

6. New Cable three 4’’ samples

Schematic:

Stiffness Schematic