Vermelding onderdeel organisatie

Problem analysisClinically driven approach

Faculty of Mechanical, Maritime, and Materials EngineeringDepartment of BioMechanical Engineering

Gabriëlle J.M. Tuijthof1,2

1Delft University of Technology, Delft, The Netherlands2Academic Medical Center, Amsterdam, The Netherlands

Illustration

Question: 2 problems

Learning objectives of this lecture

• Justify importance of independent problem analysis

• Explain clinically driven approach & discuss its

strengths and weaknesses

• Apply clinically driven approach in your project

assignment

Question: general design process

General design process

Focus: problem analysis

evaluation

Introduction orthopedics: arthroscopy-meniscectomy

tibia

femur

tibiapatella

femur

menisci

fibula

patella

cruciate ligament

arthroscope & sheath

irrigation

probe

Problem: reachability in the joint

film

Arthroscopy-meniscectomy

Problem: reachability in the joint

Current solution: large instrument set

Arthroscopy-meniscectomy

total of 20 operations complex

number of exchanges 11 (SD ± 9) 26 (SD ± 7)

Problem analysis:

Observations

Sideways & upward tipsnot in same operation

pairs: link grandma

Bridging the gap

Drawing by P. Breedveld

Characteristics surgical field

• Traditional master-pupil teaching situation

• Conservative

• Increasing technology

• Lack of reflection

Clinically driven approach

Definition:

The clinically driven approach can best be described

as a multidisciplinary problem analysis where the

physician and the designer analyze the specific needs

independent of a technical solution

Philosophy:

New instruments do truly fulfill clinical needs

Ergonomics or human-centered design

On the basis of knowledge on human characteristics

guidelines are provided for the design of human-

machine interfaces in order to perform the optimal

combination of functioning

pairs: indicate other fields

Examples of ergonomics

Prostheses and orthoses

Flight control

pairs: indicate tools

Clinically driven approach: Tools

• Literature

• Observations

• Time-action analysis

• Interview/Discussion

• Questionnaires

four: strengths & weaknesses

Clinically driven approach: Tools

write 1 sentence

+ -Literature A lot of info

Previous attemptsNot specific

Observations Fresh look Not quantitativeNo interaction

Time-action analysis Detailed info Time consumingNo interaction

Interview/Discussion Close interaction opportunity to present problems

Challenge to process data

Questionnaires Easy to process Insufficient freedom to express problems

Summary

• ….• Use the clinically driven approach for your design project