QUICKIE IRIS Manual Tilt Wheelchair User Guide

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:

1. 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.

2. 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.

3. 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:

1. Set up by QUICKIE: utilizing the client’s seated height, weight, and desired seat depth
2.  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:

1. Center of Gravity and Center of Rotation Adjustment
2. Front Stability Adjustment
3. 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
• My Sunrise - Login/Registration Page | Sunrise Medical
• My Sunrise - Login/Registration Page | Sunrise Medical
• Dealer & Clinician Resources | Sunrise Medical

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