Introducion

As medical sciences have progressed and new medicines discovered, the use of more precise and optimal methods of injecting medicinal fluids and more specifically injection in longer time spans has become evident. Peristaltic pump is used in almost all medical supervisions which require precision application of medicines more common in hospitals, elderly housings, clinics and private home patient care taking. This pump may be used for slow liquid medicine injections for the purpose of pain reduction in a wide spectrum of inpatient treatments as well as for tube feeding inpatients incapable of eating solid foods.

Due to the vital importance of peristaltic pump application precision medical institutions and in respect to previous design efforts done on this machine, the objective of this project is designing multipurpose model of it and preparing necessary plans for its industrial manufacturing using interaction design. In order to obtain the hospital nurses opinions as target population about the application and desired characteristics of a peristaltic pump, a survey research method (questionnaire, personal interview and observation) are applied. Finally, proposed plan for a novel product consists of a pump body taking into consideration the User Interface; ergonomics as well as aesthetics aspects are represented.

Project Goals

This project involves cultivating
                                                                new business opportunities




In this project we are willing to create and execute design solutions towards problems of user-Interface, form, usability and physical ergonomics. Whereby the aesthetics, ergonomics and usability of product will be improved for marketability and production.
The current consumers include the following groups:

                                 
                                                      Private Hospitals 
                       Project focus     ■ Public Hospitals
                                                      Personal Use

Project Objectives

■  Develop a product and system that specifically support users ’activities, needs, and  wants in unique and exciting ways.

■  Implementing a simple UI and short learning, To encourage widespread use for all users.

■  Improving accessibility to encompass the wide variety of the users ’disabilities.

■  Utilizing emerging technologies, materials, and processes.

■  Expanding the product into new areas of the market.

               User’s pain points 

■  For patients with physical limitations, infusion pumps can be difficult to operate correctly.
■  With current infusion pumps, there is not appropriate feedback to the input controls of the unit. This allows erroneous entries without any warning.
■  Disabilities increase the risk of patient error in device operation.
■  At least one patient from our client list suffers from some form of a vision problem, a hearing impairment or an ailment that restricts motor function.

 Carpal tunnel syndrome
 Parkinson’s disease
Arthritis
Partial paralysis.

Research Approach

In order to meet project objectives, we will employ a “user-centered” development approach. This strategy focuses on the behavioral patterns and needs of potential users, rather than a more conventional product-centered development method which focuses on merely revamping existing designs.

By focusing exceptional amount of energy on user values and needs, I aimed to understand this topic sufficiently enough to drive the resulting concepts in the next phase. With such a thorough investigation into the user, I required the use of an analytical framework for research findings. The diagram at the bottom left shows my research framework, which indicates relationships between users and their context.

Data Organization

By collecting heavy amounts of data, true knowledge is not necessarily achieved. By using organizational frameworks and categorization, one can more quickly understand the subject researched; therefore,  organizational methods was used to quickly progress from data to information (eventually creating knowledge and wisdom). The two forms shown below are examples of such tools, and were used during all user observation testing periods.

In this project I am considering what is valuable (to the user and society), possible (technologically and for the client) and what is desirable (in the marketplace). To understand these varying factors, I created an organized and comprehensive research approach, with four key topics. These topics are potential users, the client and its market, emerging technologies, and relevant socio-cultural trends. The diagram shows topic relationships, with the orange center suggesting the ideal synthesis of the collected information.

Survey and Interviews

A survey research to determine groups of users of peristaltic infusion pumps was conducted mainly in central part of USA. The field study was conducted using Analytical Hierarchy Process (AHP) method and users most involved with applying and having interaction with peristaltic infusion pumps were determined to be nurses (80%), repair personnel (15%) and patients (5%). In this research in order to identify the target group and understand its perceptions for formulating design criteria a structured questioner, personal interview and observation techniques were used. Data was collected from twenty users including nurses, repairmen and patients from hospitals and private clinics in Houston during the winter of 2018. Data analysis and processing was performed to determine the design criteria for the infusion pump body and User-interface.

Research Findings: User
environment 1: Hospitals

A hospital, in the modern sense, is an institution for health care providing patient treatment by specialized staff and equipment, and often, but not always providing for inpatient care or longer-term patient stays. Hospitals are usually funded by the public sector, by health organizations (for profit or nonprofit), health insurance companies, including by direct charitable donations. Conversely, modern-day hospitals are largely staffed by professional physicians, surgeons, and nurses, whereas in history, this work was usually performed by the founding religious orders or by volunteers.

Hospital Activity List

All major activities occurring in the hospitals were listed. Further categorization allowed for the creation of the more simplified network at the right.

Hospital  Actor Network

Actor

Relationships
Socio-cultural Trends
Market Strategy
Competitive Analysis
Brand Positioning
Aesthetic Analysis
User Profile
Company Identity
Aesthetic Direction
Human Factors
Budget Estimation
■ Budget currently under rough estimation
No excessive work done on Design Project
Final Budget established near optimal design
Will be below $2,000
■ Market/Industrial Influence
Quick and Steadfast Implication
More Reliable Product
Higher Credibility
Concept Development
Form Study Models
Top three designs based on
                  Users needs and design criteria
Performance Criteria
■  Use of horizontal door for ease of line installation and connection;
■  Reduction in production costs and producible with present technologies;
■  Use of touch screen monitors;
■  Use of standing or stationary form and design;
■  Creation of visual balance for viewer's mental relaxation;
■  Ease of operation and minimizing steps in using and operating the machine for quick remembrance of tasks performed;
■  Use of remote control;
■  Equipped with alarm systems to point to technical problems;
■  Capability of saving data in the active memory for reuse of instructions during the period of treatment specified by the physicians;
■  Ease of learning how to work with the interface;
■  Accomplish a task the first time they encounter the interface
■  Reliability during its operation.
Ergonomic Criteria
■   Light body design for ease of product replacement and installation;
■   Safety considerations in surface contacts design;
■   Proper positioning of handles for ease of access for users;
■   Capability of light adjustment of the screen with the environment lighting;
■   Proper screen dimensions for better users' observation and information analysis;
■   Use of screen with wide observation angle;
■   Ease of repair and maintenance with easy dismantling and parts replacement;
■   Suitable handles dimensions comparable with the product performance;
■   Vivid and transparent letters, symbols and applicable signs on the screen using light contrasts;
■   Capability in changing stands height and adaptability with users physical characteristics.
Aesthetics Criteria
■   Simple and modern design;
■   Use of curvature and soft shapes;
■   Sectional integration for visual clarity, least number of parts and use of integrated forms;
■   Use of neutral colors and gray spectrum for reduction in visual complexities and observance of health issues;
■   Stress reduction based on appearance characteristics such as form and suitable color;
■   Induced appearance to give a power sensation and self confidence to users;
■   Exciting appearance for persuading users to operate the product;
■   Diversity in surface quality of outer parts for better visualization and differentiation; use of variety of surfaces with shiny and opaque layers;
■   Product's visual coordination with surroundings suitable to hospitals environment.
Infusion pumps details
Horizontal door: The pump's encasement with horizontal door provides better control over its function as nurses connect lines
Touch screen and On/Off button: The use of touch screen reduces production costs and gives more suitable dimensions to it for better observation and visual understanding of the information on the screen. Moreover, the placement of on-off key on the screen is more accessible to users
The remote control: The design of the remote control gives a new way of access to the information for the users to control drug infusion
Friendly user interface: The various sections of the screen or display include on-off key, treatment start key, treatment stop key, performance confirmation key, LED lights for indicating the method of treatment and machine performance status
Easy access to the battery: Easy access to the battery is made possible so that it may be replaced while the pump is at use
and connected to the patient
The internal parts of the system included front door made from ABS, cam lobes or rollers for the liquid movement in the lines or pipes made from polyamide, the LCD, front and back cover made from ABS, touch screen, motor, electronic board, and the battery door made from ABS
Based on a field study by a constructed questionnaire, personal interview and observation, the most important criteria for design of a peristaltic infusion pump considering the target user group characteristics, system functioning, ergonomic factors and aesthetics factors are obtained. The configuration of the pump is designed based on the criteria obtained from the interaction design strategy. Multi-functioning in terms of using a combination of most effective and applicable treatments, economic use of materials, energy conservation and optimization are some of the pump's unique characteristics which contribute to an easier, more reliable, effective and pleasant treatment process for main user group that is nurses as well as the patients.
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