QUICKIE IRIS Manual Tilt Wheelchair User Guide
- June 12, 2024
- QUICKIE
Table of Contents
QUICKIE IRIS Manual Tilt Wheelchair
Product Information
The product is a wheelchair with a tilting mechanism that allows the user to
rotate around their center of gravity. This design results in a smooth tilting
motion and a balanced system within a tilted position. The chair has a
configurable system that can be adjusted based on prescription and final
adjustments to optimize performance. The wheelbase is shorter than other
wheelchairs with tilt mechanisms, providing stability in different degrees of
tilt. The product can be set up using two different methods: QUICKIE setup,
which considers the client’s seated height, weight, and desired seat depth,
and Depth setup, which utilizes the frame depth range and pre-selected frame
depth. These methods help optimize the wheelchair’s center of rotation (COR)
with the client’s center of gravity (COG).
Note that aftermarket backrests, custom molds, ventilators, and other
additional medical or personal items are not accounted for in the
configuration. It is recommended to assess the ease of tilt by a clinician and
assistive technology professional/certified rehab technology supplier upon
delivery to ensure optimal tilt performance and durability of the tilt
mechanism over time.
Product Usage Instructions
Independent Adjustments: In order to optimize tilt performance, wheelchair performance, and maneuverability, there are three different independent adjustments that need to be considered:
-
Center of Gravity and Center of Rotation (CG-CR)
Adjustment: To complete this adjustment, move the back canes and the leg rest hanger assembly an equal distance to bring them into alignment while maintaining seat depth. This may impact over all wheelchair stability as the entire seating system has been moved. Adjust the front or rear stability if necessary. -
Front Stability Adjustment: This adjustment is needed if the client’s center of gravity (COG) is positioned in front of the wheelchair’s center of rotation (COR). To prevent forward instability or tipping forward when going down a slope, make the necessary adjustments.
-
Rear Stability Adjustment: This adjustment is necessary if the client’s COG is positioned behind the wheelchair’s COR. To prevent rearward instability or tipping backward when going up a slope, make the necessary adjustments. Take into consideration any personal or medical items placed on the back of the wheelchair, as they can exacerbate the instability.
Optimizing Performance of the QUICKIE IRIS®
Intelligent Rotation In Space technology on the QUICKIE IRIS® was designed for the seat frame to rotate around the user’s center of gravity, resulting in a smooth tilting motion and a system that remains balanced within a tilted position. Functionally, this design results in a tilt that is easy to control and allows for the shortest possible wheelbase that is easy to maneuver. Ultimately, prescription and final adjustments to this highly configurable system will impact the ease with which the chair can tilt and is essential to optimizing its performance.
The red circle in the very center of the graphic shows the alignment of the person’s center of gravity with the center of rotation of the tilt mechanism. The shaded areas of the seated person illustrate that whatever degree of tilt the seat is in, the person’s center of gravity and center of rotation remain aligned. Because there is no horizontal movement of the person’s center of gravity with different degrees of tilt, the wheelbase is shorter than wheelchairs with other tilt mechanisms, while still providing stability in different degrees of tilt.
Improving Tilt Performance
When designing a chair, the center of rotation can be determined based on two different methods:
- Set up by QUICKIE: utilizing the client’s seated height, weight, and desired seat depth
- Set up by Depth: utilizing the frame depth range and pre-selected frame depth
These methods help QUICKIE to optimize the wheelchair’s center of rotation (COR) with the client’s center of gravity (COG).
Note: The addition of any aftermarket backrest, custom mold, ventilator,
and any number of additional medical or personal items are not accounted for
as part of this configuration.
Therefore, it is recommended that the ease of tilt be assessed by the
clinician and assistive technology professional/certified rehab technology
supplier upon delivery to ensure optimal tilt performance for the client and
caregiver, along with durability of the tilt mechanism over time.
Independent Adjustments
In order to optimize tilt performance along with overall wheelchair performance and maneuverability, there are three different independent adjustments that need to be considered:
- Center of Gravity and Center of Rotation Adjustment
- Front Stability Adjustment
- Rear Stability Adjustment
Center of Gravity and Center of Rotation (CG-CR) Adjustment
Complete a CG-CR adjustment by moving the back canes and the leg rest hanger
assembly an equal distance to bring them into alignment while maintaining seat
depth. This may impact the overall wheelchair stability as the entire seating
system has been moved. Therefore, the front or rear stability may need to be
adjusted next.
If the client’s COG is positioned in front of the wheelchair’s COR : the
chair will tend to rotate forward out of tilt and into an upright position.
This will result in forward instability or tipping forward when going down a
slope and will be more difficult for the caregiver to tilt the wheelchair
back.
If the client’s COG is positioned behind the wheelchair’s COR: the chair
will tend to rotate back and into a full tilt position. This will result in
rearward instability or tipping backward when going up a slope and will be
more difficult for the caregiver to tilt the wheelchair upright. Remember,
this may also be exacerbated by any personal or medical items placed on the
back of a client’s wheelchair.
In this case, completing the CG-CR adjustment will move the seating system forward relative to the caster wheels, impacting the front stability.
Front Stability Adjustment
The front stability adjustment allows you to reposition the carriage over the
base frame. In this case, front stability was improved by moving the carriage
rearward to realign the hanger and the front caster, making it less forward
tippy.
Rear Stability Adjustment
In this case, the center of gravity passes over the axle of rear wheel. By
moving the rear wheel back on the base frame, the rear stability was improved
to ensure client and caregiver safety when propelling up an incline.
QUICKIE IRIS® 
RESOURCES
If you have questions regarding how to make these adjustments, please visit
the Instructional Video Gallery, located within the Technician Support Center
on our Dealer & Clinician Resources page, or visit the Sunrise Medical YouTube
channel, where you can view these adjustments and other videos provided by our
technical education team.
REFERENCES
Consortium for Spinal Cord Medicine, Pressure Ulcer Prevention and Treatment
Following Spinal Cord Injury: A Clinical Practice Guideline for Health-Care
Professionals 2nd. ed., 2014.
Dicianno, B. E., Lieberman, J., Schmeler, M. R., Souza, A. E., Cooper, R.,
Lange, M., . . . Jan, Y. (2015). Rehabilitation Engineering and Assistive
Technology Society of North America’s Position on the Application of Tilt,
Recline, and Elevating Legrests for Wheelchairs Literature Update. Assistive
Technology,27(3), 193-198.
Jan, Y., Liao, F., Jones, M. A., Rice, L. A., & Tisdell, T. (2013). Effect of
Durations of Wheelchair Tilt-in-Space and Recline on Skin Perfusion Over the
Ischial Koda, Okada, Y., Fukumoto, T., & Morioka, S. (2022). Effect of Tilt-
in-Space and Reclining Angles of Wheelchairs on Normal Force and Shear Force
in the Gluteal Region. International Journal of Environmental Research and
Public Health, 19(9), 5299–.
https://doi.org/10.3390/ijerph19095299
Lyons, Elizabeth A., et al. (2017). An Exploration of Comfort and Discomfort
Amongst Children and Young People with Intellectual Disabilities Who Depend on
Postural Management Equipment. Journal of Applied Research in Intellectual
Disabilities, 30 (9), Wiley Subscription Services, Inc, pp. 727–42,
https://doi.org/10.1111/jar.12267
Wieczorek, Kukla, M., & Warguła, Ł. (2020). Methods for measuring the position
of the centre of gravity of an anthropotechnic human-wheelchair system in
dynamic conditions. IOP Conference Series. Materials Science and Engineering,
776(1), 12062–. https://doi.org/10.1088/1757-899X/776/1/012062
Zemp, Rhiner, J., Plüss, S., Togni, R., Plock, J. A., & Taylor, W. R. (2019).
Wheelchair Tilt-in-Space and Recline Functions: Influence on Sitting Interface
Pressure and Ischial Blood Flow in an Elderly Population. BioMed Research
International,4027976–10.
https://doi.org/10.1155/2019/4027976
DISCLAIMER: FOR PROFESSIONAL USE ONLY. THIS DOCUMENT (AND THE WEBSITE
REFERENCED HEREIN) DO NOT PROVIDE MEDICAL ADVICE. Sunrise Medical (US) LLC
does not provide clinician services. The information contained on this
document (and the website referenced herein), including, but not limited to,
the text, graphics, images, and descriptions, are for informational purposes
only and should be utilized as a general resource for clinicians and suppliers
to then use clinical reasoning skills to determine optimal seating and
mobility solutions for individual patients. No material on this document (or
on the website) is intended to be used as (or a substitute for) profession-al
medical advice, diagnosis or treatment. Clinicians should adhere to their
professional medical training and their institution’s or practice’s
recommended guidelines.
Reliance on this document (and the information contained herein) is solely at
your own risk.
Sunrise Medical (US) LLC, Fresno, CA 93727 MK-130081 Rev.A ©02.2023
800.333.4000 www.SunriseMedical.com/EIM
References
- Methods for measuring the position of the centre of gravity of an anthropotechnic human-wheelchair system in dynamic conditions - IOPscience
- Wheelchair Tilt-in-Space and Recline Functions: Influence on Sitting Interface Pressure and Ischial Blood Flow in an Elderly Population
- IJERPH | Free Full-Text | Effect of Tilt-in-Space and Reclining Angles of Wheelchairs on Normal Force and Shear Force in the Gluteal Region
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