Back support and the PSIS

10 November, 2021

Written by Ride Editor

A good back support makes it possible to optimize pelvic alignment and then balance the trunk without affecting pelvic alignment. 

Java Back Support with Java Cushion

The key to achieving this support goal is in the way the back support pivots around its axis for seat to back angle.

When the Java Back is positioned correctly on the wheelchair, it provides optimal pelvic alignment. It can then be adjusted for trunk balance without changing the pelvic alignment already achieved. Correct height adjustment of the Java Back on the wheelchair is key. 

When determining the correct height of the Java Back on the client’s wheelchair, it is important to locate the client’s PSIS (Posterior Superior Iliac Spine).

Line up the PSIS (indicated by dotted line) at pivot point of the Java Back, shown here from rear.

The PSIS is the most prominent posterior aspect of the iliac crest. If you’re not sure how to locate a client’s PSIS, here are some tips: 

  1. Stand behind the client and find the iliac crest laterally. Move your thumbs in and down until you find a prominent bony bump (which sharply disappears distally and inferiorly).
  2. Look for the two dimples on the lower back — the PSIS are typically located under the dimples.

Then adjust the back height so that the back angle pivot point lines up with the client’s PSIS. This allows the back to pivot around that point of control at the pelvis and not affect the anterior-posterior (sagittal plain) pelvic orientation.  

Java Back for wheelchairs

The Java Back’s patented biomechanical design provides the flexibility to easily and independently optimize pelvic support and balance the trunk, supporting the normal rhythm and movement of the body. The user experiences comfort and stability at rest, and no interference with function and mobility. The Java Back is most effective when coupled with a Ride® wheelchair cushion to aid in postural control and help reduce risk for tissue injury. The Decaf Back shares all the adjustable features of the Java Back, plus a few extras, to meet the specific needs of growing and developing children.

ADJUSTS TO FIT UNIQUE CONTOURS

The Java Back can be flexed specifically to support the unique contours of the user’s body without loss of seat depth and to provide accurate supportive contact through the pelvis, lumbar and thoracic spine.

OFFERS WIDTH, HEIGHT, AND DEPTH OPTIONS FOR BEST FIT

The Java Back is available in multiple widths, in three heights and two depths. Back heights are regular (below scapulae), tall (mid-scapulae), and grande (top of shoulder), all in depths of either three or six inches.

ADJUSTS EASILY FOR QUICK, ACCURATE FITTING

Height, depth, angle, pelvic support, and trunk balance can all be adjusted independently. The simple, compact Java Back quick-release hardware offers 20 degrees of back angle adjustability, two inches of seat depth adjustability, and two inches of back width adjustability. Only the Ride Custom Back, which can be made to fit virtually any size and contour, provides greater accuracy of fit.

ATTACHES SIMPLY FOR EASY DAILY USE

The Java Back is lightweight and easily removed from the wheelchair, even with limited hand function. A robust locking mechanism safely secures the back to the wheelchair, yet is easy to release.

HELPS IMPROVE HEAT AND MOISTURE BUILDUP

A spacer fabric cover promotes air circulation and wicks moisture away from the back for improved comfort and sitting tolerance.

 

Call 0800 31 61 81 or email helpis@alliedmedical.co.nz for more information or to chat with one of our Business Territory Managers.

One of our Business Territory Managers will happily help you through the process of arranging a pre-quote for your client to support any application you may be making to arrange trial approval.