It may not be snug enough to secure the pelvis so that it is truly stable in the seat. Support may also be needed on either side of the trunk and the head. Armrests or a lap tray can be provided to rest the forearms in a wheelchair. Additional support may be needed for the shoulders and on either side of the knees. Foot supports will keep the base of support evenly distributed across the child's thighs and feet.
Support is as important an issue for sidelying as for seated positioning.
As mentioned above, the type of sidelying equipment used will depend on the child's specific needs. Mealtime is often not well understood in terms of attention to positioning and the difference positioning can make to nutrition. Mealtime is more of a parent-child occurrence. However, integrating the perspectives of therapists with this personal time can make a significant difference for the child's nutrition. When therapeutic positioning for mealtime is necessary, the child has more ability to eat and digest food comfortably and safely.