P16080: Heart Pump
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Problem Definition

Table of Contents

Project Objective Statement

To plan, design, and create a mechanical heart pump that simulates the mathematical models of the circulatory system to be studied and used by the students and instructors of BIME 492. This project will work in conjunction with the physical model of the systemic circulatory system, P16081.

See the link to the most up to date word document of our Project Objective Statement here

To locate any and all documents used during our Problem Definition Review Phase, see our Problem Definition Review Directory

Project Summary

A Mechanical Heart Model (MHM) is a device that allows for the simulation of human heart function without biologic restraints. As it currently stands, students in BIME 492 are forced to use themselves as subjects when experimenting with heart function. A MHM will allow these students to physically study the heart under different conditions. This allows for the students to gain a more solid foundation in understanding basic heart function. Current MHM devices are too expensive and complex for use by these students.

The goals of this project are to explore currently marketed MHM devices. Specifically, we will attempt to better cost efficiency and operational simplicity, as well as a design that clearly displays heart subsystem function to the user. The expected result is a practical prototype that can model various blood flows of a human heart, with the eventual goal of being reproducible and used in RIT BIME labs. This prototype design must adhere to current RIT BIME lab resources and needs.

For more detailed information on our project, see our Project Readiness Package

Background & Benchmarking

Solutions to our project currently exist on the commercial market, but are unfortunately too complex & expensive for what the RIT BIME department is looking for. These models are capable of producing an adjustable, pulsatile pressure & flow like that of the human heart. To aid in our design of our MHM, we have begun looking up the specs on these models to compare them to our own expected design. This process is known as product benchmarking.
Initial information on product benchmarking

Initial information on product benchmarking

The above table displays the parameters for existing models. Some models, such as the Dr. Day model, were not available for immediate investigation, but will be updated shortly upon review.

To view the full up to date excel document of our benchmarking, click the link here

See the direct link to the Pulse Duplicator here

See a link to the Harvard Apparatus here

Primary Stakeholders

Stakeholders are persons, groups, or organizations who are involved in or are affected by a process, which in this case, is the design and development of a mechanical heart pump. Below is a list of this project's stakeholders and their respective primary concerns.

Use Cases

Main use scenario for the Mechanical Heart Pump

Main use scenario for the Mechanical Heart Pump

Customer Requirements (Needs)

Purpose: Decompose the Problem Statement into functions of elements needed to satisfy the customer.

Current set of customer requirements

Current set of customer requirements

See a link to our .xlsx file of our current Customer Requirements

Engineering Requirements (Metrics & Specifications)

Purpose: Create a contract between the engineer and the customer where indisputable satisfaction of the engineering requirements equates to customer satisfaction

Engineering Requirements draft

Engineering Requirements draft

See a link to our .xlsx file of our current Engineering Requirements

  1. References:

https://edge.rit.edu/edge/PTemplate/public/Establish%20Engineering%20Requirements

Risk Management

The likelihood of project success has been assessed by focusing on the most important failure modes. Below is a draft list of our very first risk assessment:
First draft of risk management

First draft of risk management

House of Quality

Purpose:

  1. Confirm that satisfaction of the Engineering Requirements implies that all of the Customer Requirements are met.
  2. Facilitate design trade off decisions
House of Quality

House of Quality

Design Review Materials

See a link to our Problem Definition Review Powerpoint Presentation

Plans for next phase

This Gantt Chart shows our progress over the past 3 weeks, and where we hope to be by the end of the next cycle (click to enlarge)

This Gantt Chart shows our progress over the past 3 weeks, and where we hope to be by the end of the next cycle (click to enlarge)

See a full PDF of our Gannt Chart in this link


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