Posterior pelvic tilt
- Shape up in Cross 5 and Cross 6
Etac Cross 5 and Cross 6, can be set up for both a taller or a shorter users with different body shapes.
The majority of users will use the standard back support. Using the standard back support, the 3A-back support can be adjusted in height from 32 cm to 45 cm. And with the high back support you can get as high as 51 cm.
Once the desired back height is adjusted and set, the fine tuning of the strap back can be done, and any accessories to support and shape up the posture can be added.
The challenge with a posterior pelvic tilt is to provide a back support that optimises both with pelvis position and the thoracic back. Start by adjusting the seat to back angle posteriorly to allow the user contact with the back support from the buttocks.
Adjust the lumbar angle to create a balanced trunk and head position. Be sure to provide posterior support with the tension adjustable back strap at PSIS level (1). If extra side stability is needed, add Plush Wedges (2) or Side Cushions (3), supported by straight Side Stops (4) if needed.
A properly adjusted Positioning Belt (5), a four point belt is often required, and a contoured seat cushion are also recommended.
1. Supporting the pelvis
Aim to position the user as far back into the seat as possible to benefit from the support from the tension of the adjustable strap back. The strap in level with the PSIS, needs to be tight to secure the pelvis in a position as close to neutral as possible. Adjust the lumbar angle and the back straps to create a balanced trunk position, then carefully fine tune the seat to back angle into a slightly more upright posture. If the user compensates by sliding forwards in the seat or leans forward in their trunk, then the adjustment is too great and the seat to back angle should be adjusted to allow a more reclined posture.
2. Plush wedges
Attach the wedges with the Velcro facing forward, towards the back cover. If the user feels the edge of the back cover, chose one size wider that will fully cover the widened wedges.
3. Side cushion
It is supported by the arm support and/or the straight side stops.
4. Straight Side Stops
They are easily mounted into the back rail and can be adjusted in height, angle and depth.
5. Positioning belt
On both Cross 5 and Cross 6 you have two alternative attachment points on the frame, and it is easy to add a 2 point or a 4 point positioning belt.
Example of accessory placement
Example of accessories placed on the back support. Here with the side cushion supported by the straight side stops to provide lateral support.