The Institute for Special Textiles and flexible Materials · 6 11 Vest with integrated contactless...
Transcript of The Institute for Special Textiles and flexible Materials · 6 11 Vest with integrated contactless...
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Smart Textiles for Medical Applications
S. Hanus, D. Schwabe, A. Neudeck, U. Möhring
D. Zschenderlein
Company mission
„Smart textiles in Thueringen/Germany”
11./12.June 2012
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Content
I. Background, Overview
II. Sensory Electrodes - EMG and ECG Monitoring
III. Actuatory Electrodes - Therapeutical textile
Electrodes
IV. Active Heatable Textiles
V. 3D- Knitted Elastic Short Traction Bandages
VI. Embroidered Implants for Tissue Engineering
VII. Further Applications for Medical Textiles
VIII. Textiles for Light Therapy
IX. Summary & Outlook
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Medical Textiles – Novel Functions
• Novel functional special textiles (resulting from the combination of
textile and non-textile technologies)
=> interesting alternative to use systems for medicine and
medicine technology
• Integration of new functions by special textile material
combinations
– Thermophysiological / wearing comfort
– Sweat transport
– Stress-strain behavior
• Integration of common electronics (sensors, amplifiers,
electronics) in textile materials
• Development of new textile based systems
– Sensoric
– Actuatoric systems
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Medical Textiles – Working Areas of TITV Greiz
Medical Textiles or Textiles for
Medical Applications
Passive Systems
• Antidecubitus systems
• Compression bandages
• Textile implants
Active Systems
• Sensory electrodes
• Actuatory electrodes
• Heating systems
• Light therapy
(active medical product cl.2a)
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Content
I. Background, Overview
II. Sensory Electrodes - EMG and ECG Monitoring
III. Actuatory Electrodes - Therapeutical textile
Electrodes
IV. Active Heatable Textiles
V. 3D- Knitted Elastic Short Traction Bandages
VI. Embroidered Implants for Tissue Engineering
VII. Further Applications for Medical Textiles
VIII. Textiles for Light Therapy
IX. Summary & Outlook
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Electrodes for Therapeutically and Monitoring
Systems – Electronical Signals
Electrodes
Sensors
• Electromyogram –EMG
• Electrocardiogram -ECG
• Skin Resistance
• EEG…
Actuators
• Transcutaneous
Electrical Nerve
Stimulation - TENS
• Electrical Muscle
Stimulation - EMS
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Problems – Skin contact electrodes
Problems:
• Long term stability of the electrical contact between
skin and electrode
Contact impedance
• Displacement of the electrodes during movement
Mechanical contact
• Real textile integration of the electrodes and
additional devices
Comfort aspects
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Solution – New Technologies
New materials & finishing
processes
• Integration of electrolyte in
the textile
• Better contact impedance
between skin and electrode
for actuatoric (sensory)
electrodes
Non contact electrodes
• Capacitive measuring
principle
• EMG/ECG monitoring
through textiles / clothing
for sensory electrodes
Two research areas at TITV Greiz
for textile electrodes
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Textile Based Sensory Electrodes
• Woven belt with integrated textile ECG-electrodes
• Embroidered EEG-electrodes
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11
Vest with integrated contactless EMG
sensors (M. Trapecius)
Contactless Sensors for Body Monitoring
Incorporated in Textiles
EU-STREP 027291
Sensor K 7
textile layers / insulation
conductive layers,
capacitor
• Contactless measuring of EMG, ECG
• Development of textile (based) sensors
• Incorporation of contactless (without skin contact) sensors into textiles by weaving, enmbroidery, printing, laminating
• Continuous / long term monitoring
• Studying measuring of mental stress by EMG (algorithms)
• to be used by untrained individuals
• Development of the ConText prototype
• Development of the application concepts for the ConText technology
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Contactless EMG Sensor – Actual Prototype
laminated sensor
(Clothing+, TUB)
woven bus structure
(TITV)
electronics with
encapsulation (TUB)
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Automotive applications
Integration in steering
wheel for measuring body
signals
Electrodes / sensors for ECG / EMG measuring
Source: Project Insitex (Daimler)
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Contact less measuring for
recording of stress
• Integration in seats
Automotive applications
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Content
I. Background, Overview
II. Sensory Electrodes - EMG and ECG Monitoring
III. Actuatory Electrodes - Therapeutical textile
Electrodes
IV. Active Heatable Textiles
V. 3D- Knitted Elastic Short Traction Bandages
VI. Embroidered Implants for Tissue Engineering
VII. Further Applications for Medical Textiles
VIII. Textiles for Light Therapy
IX. Summary & Outlook
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Electrodes for Therapeutically and Monitoring
Systems – Electronical Signals
Electrodes
Sensors
• Electromyogram –EMG
• Electrocardiogram -ECG
• Skin Resistance
• EEG…
Actuators
• Transcutaneous
Electrical Nerve
Stimulation - TENS
• Electrical Muscle
Stimulation - EMS
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Actuatory Applications I
Sources: 1) Bio-Medical Research GmbH neurotech, 2) Cefar-Compex Scandinavia AB
Stimulation of nerves and muscles be surface electrodes
• e. g. physical therapy, sports, wellness, pain treatment
• but: placement / displacement (moving, sweat) of electrodes difficult => home use, long term applications
• fixation by elastic bandages
• wires reduce the comfort of the wearer
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Integration in an elastic Bandage – 1st Prototype
• Elastic bandage with velcro strip
• Active area: 45 x 45 mm
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Experiments with Test Persons
Test person with textile and glued
electrodes
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First Tests at the University Hospital of Jena, Germany
Experiments at the insitute of physical therapy
• Comparison of textile and glued electrodes (left + right
thigh)
• Test parameters:
• Transcutaneous Electrical Nerve Stimulation - TENS
• Electrical Muscle Stimulation – EMS
• Electromyogram as biofeedback
• Registration of skin resistance, skin temperature
• Subjective impression of the test persons
• 25 test persons
• Defined test conditions
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Applications
• Sports & wellness, additional training
• Long-term therapy
=> washable electrode systems, easy to use
• Muscle training after surgery of the joints
knee, elbow, etc.
• Pain-treatment (TENS) by integration of the electrodes
in clothing
• Incontinence therapy
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Content
I. Background, Overview
II. Sensory Electrodes - EMG and ECG Monitoring
III. Actuatory Electrodes - Therapeutical textile
Electrodes
IV. Active Heatable Textiles
V. 3D- Knitted Elastic Short Traction Bandages
VI. Embroidered Implants for Tissue Engineering
VII. Further Applications for Medical Textiles
VIII. Textiles for Light Therapy
IX. Summary & Outlook
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Textile Solutions for Medical Thermal
Therapy and Prophylaxis
• Development of heat able woven
structures
• Integration of heating wires /
thread by embroidery
• Convective operation heating
systems with integrated 3D
structure for decubitus
prophylaxis
(our partner: Moeck & Moeck GmbH)
• Development of fluidic cooling
systems
warmX GmbH
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• Smart 3D fabric compounds • Use of conductive metal coated polymer yarns and
carbon yarns
• Crimp of the yarns into the pole area between the
surfaces
• Yarn density adjustable to application (size of the
pads, required temperature, etc.)
• Electrical contacting via embroidery
• Highly flexible
• Low weight
Active Heatable Textiles
Active heating bandage
Heating pad (high flexible, low
weight, air conductive)
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Active heating and cooling system
Kröhnert System
Fluidic Heating & Cooling System
Our partner:
Kröhnert Chilling & Heating
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Content
I. Background, Overview
II. Sensory Electrodes - EMG and ECG Monitoring
III. Actuatory Electrodes - Therapeutical textile
Electrodes
IV. Active Heatable Textiles
V. 3D- Knitted Elastic Short Traction Bandages
VI. Embroidered Implants for Tissue Engineering
VII. Further Applications for Medical Textiles
VIII. Textiles for Light Therapy
IX. Summary & Outlook
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3D Spacer Fabrics at TITV
Medical Textiles made by
3D - Spacer Fabrics
(Examples) :
- Compression Bandages
- Mattresses
- Wheelchairseat
- Prosthesis-pad in bras
- Hip protectors
- Medical Shoe Inlay / Soles
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3D Spacer Fabrics
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Special properties of spacer fabrics
• Good press elastic behaviour
depending of the construction
• Dissipation of moisture
from one textile surface to the
other surface through the distance zone
• Air circulation / temperature regulation or isolation by the
distance zone
• Flexibility through the mesh structure
• Very good physiological behaviour / comfort
• Recyclable and asepticable
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Complex Anti-Congestion Therapy
• By manual lymph drainage, stimulating
the whole system and supporting the
necessary outflow of excess body fluid
– Bandaging (compression therapy)
as flanking action of the manual
lymph drainage, to prevent the re-
accumulation of edema fluid
– Compression stockings for the
conservation and optimization of the
therapy success
• Important is the patient’s acceptance for
the enacted arrangements to integrate
the different methods of treatment into
the patient’s everyday life!
Primary lymph edema
Source: vasomed 1/ 92
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3D- Knitted Elastic Short Traction Bandages
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Requirements to 3D-compression bandages
• Figuration of a soft, eudermic, not too smooth surface
• Defined transport of moisture away from the skin
• Stabile construction of the distance-keeping
zone in the spacer fabric
• Defined elongation accordingly a
short traction bandage as well as
construction of a limited
transverse elongation for a
better winding
especially in the joint areas
• Defined widths (8,10,12 cm)
• Knitted, flattened edges
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Construction:
• Sandwich-structure, consisting of shock-absorbing foam
in combination with spacer fabrics
• Use of foams from the field of orthopaedics technology
for maximum shock-absorption
Textile-based hip protection pads
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Content
I. Background, Overview
II. Sensory Electrodes - EMG and ECG Monitoring
III. Actuatory Electrodes - Therapeutical textile
Electrodes
IV. Active Heatable Textiles
V. 3D- Knitted Elastic Short Traction Bandages
VI. Embroidered Implants for Tissue Engineering
VII. Further Applications for Medical Textiles
VIII. Textiles for Light Therapy
IX. Summary & Outlook
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Embroidered Implants for Tissue Engineering
Tissue engineering: replacement of body tissue by artificial or bred
human tissue
• Three dimensional textile based implant constructions like
scaffolds and patch grafts for the tissue engineering
• Principle of chemical embroidery => it is possible to create
individual and application-related scaffolds and patch grafts
Example: Embroidered
scaffold construction in a
ten-layer construction with
biocompatible yarns
national funded project AIF 15136 BG
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Content
I. Background, Overview
II. Sensory Electrodes - EMG and ECG Monitoring
III. Actuatory Electrodes - Therapeutical textile
Electrodes
IV. Active Heatable Textiles
V. 3D- Knitted Elastic Short Traction Bandages
VI. Embroidered Implants for Tissue Engineering
VII. Further Applications for Medical Textiles
VIII. Textiles for Light Therapy
IX. Summary & Outlook
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Further Applications for Medical Textiles I
• Special socks for
diabetics • Optimal positions of
sewings
• Avoid pressure peaks by
using special materials
• Perfect fit
• No folds
• Attractive optic
• Antimicrobiel effect with
silver
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Further Applications for Medical Textiles II
• Special orthesis with
integrated knee ankle
measuring and biofeedback
system
• Operation table cover made
by 3D Spacer Fabrics
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Content
I. Background, Overview
II. Sensory Electrodes - EMG and ECG Monitoring
III. Actuatory Electrodes - Therapeutical textile
Electrodes
IV. Active Heatable Textiles
V. 3D- Knitted Elastic Short Traction Bandages
VI. Embroidered Implants for Tissue Engineering
VII. Further Applications for Medical Textiles
VIII. Textiles for Light Therapy
IX. Summary & Outlook
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Platform for Large Area Conformable Electronics by
Integration – PLACE-it
www.place-it-project.eu
Textiles for Light Therapy
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Textiles for Light Therapy
„Bilirubin blanket“
• Treatment of Jaundice
• Blue light (weave lenght: 460 nm)
Quelle: Philips (NL) - Innovation Experience 2011
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• Blue Touch Pain Relief Patch
• Stimulation of NO production for pain treatment
• Medical product class 2a
Textiles for Light Therapy
Source: Innovation expirience 2011 / Philips Electronics N.V. (NL)
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Content
I. Background, Overview
II. Sensory Electrodes - EMG and ECG Monitoring
III. Actuatory Electrodes - Therapeutical textile
Electrodes
IV. Active Heatable Textiles
V. 3D- Knitted Elastic Short Traction Bandages
VI. Embroidered Implants for Tissue Engineering
VII. Further Applications for Medical Textiles
VIII.Textiles for Light Therapy
IX. Summary & Outlook
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Summary & Outlook
• Textile materials allow a wide range of medical
(prevention, diagnostics, therapy) application by the
combination of functional material and new
technologies
• Advantages of textiles (wearing comfort, breathability,
“easy to handle”, look, etc.) in combination with
medical requirements
• TITV Greiz works on the development of passive and
active medical textiles together with industrial,
academic and medical partner
Textile Research Institute
Thuringia – Vogtland e. V. Zeulenrodaer Straße 42
07973 Greiz
Phone : +49 (0) 3661 – 611 0
Fax : +49 (0) 3661 – 611 222
www.titv-greiz.de
The Institute for Special Textiles and Flexible Materials
Thank You for Your Attention!
Contact:
Dirk Zschenderlein
Phone: +49 3661 611 203