Like any assistive equipment, proper fitting is key to get the most of your Trexo. It is important that your child meets the size requirements to use the Trexo correctly and prevent any discomfort. The size restrictions are related to the Rifton Dynamic Walker and the Trexo Robotic legs. So how do we check if your child fits the device? Read on below.
Trexo adjustability
The Trexo can be adjusted in the following areas to fit the user:
- Hip to knee length
- Knee to floor length
- Ankle size for different shoes
- Amount of weight bearing
- Gait pattern
The first three adjustments are directly related to the size of the user. The weight bearing and gait pattern are designed to accommodate different ranges of motion and abilities.
Our robotic legs have two points of rotation: the hip joint and the knee joint. These joints are how the robot controls the walking motion. The Trexo hip and knee joints must be correctly positioned with the user’s hips and knees to ensure good coupling. Essentially, the Trexo legs and the user’s legs should work together in unison.
For the full list of adjustment and features that come with the Trexo, please see our Trexo features to set you up for success list.
How to measure your child
Let’s start with measuring your child’s legs. We recommend that you collect these measurements while your child is lying down on their back. They should be wearing their shoes and AFO’s for accurate measures. All measures shown below are in centimeters.
When measuring the length of your child’s hip to knee, you should first determine the point of rotation at each joint. Use the picture below to guide you in finding the point of rotation. Jot down the distance between the hip and the knee, and then the knee to the floor.
Trexo sizing
The Trexo comes in four sizes: small, medium, large and x-large. The small and medium Trexo both sit on the Medium size (K630) Dynamic Rifton Pacer. The large Trexo sits on the Large size (K640) Dynamic Rifton Pacer. The x-large Trexo sits on the X-Large (K650) Rifton Dynamic Pacer.
Refer to the chart below for the size ranges of all four Trexo sizes. If you’re looking to order a Rifton Dynamic Pacer to use with the Trexo, please contact a Trexo representative to ensure that you order the correct size and accessories. Standard Rifton use fits different than a Rifton Dynamic Pacer, which is used with the Trexo.
In addition to the size of the Trexo, your child may need accessories to assist with trunk support. The full list of Rifton Dynamic Pacer accessories and prompts is available here.
| Small | Medium | Large | Extra Large | |
|---|---|---|---|---|
| Rifton Dynamic Pacer | Medium (K630) | Medium (K630) | Large (K640) | Extra Large (K650) |
| Age Group (years) | 1 – 3 | 3 – 6 | 6+ | 6+ |
| Hip to Floor (cm) | 40 – 47 | 43 – 53 | 55 – 76 | 62 – 94 |
| Hip to Knee (cm) | 18 – 18 | 21 – 24 | 26 – 34 | 29 – 39 |
| Knee to Floor | 22 – 29 | 22 – 29 | 29 – 42 | 33 – 55 |
| Weight Max Limit (kg) | 36 (80 lbs) | 36 (80 lbs) | 56 (125 lbs) | 68 (150 lbs) |
**Age groups are estimated based on the average height distribution of normally developing children
Trexo fitting and trial
Once you have determined your child fits in one of the four Trexo sizes, you can place your reservation and wait to hear back from our team for some measurements and visual for your child’s Trexo Assessment. After this, you will get updates on the delivery timeline of the Trexo.
During your training, we will fit the Trexo for your child. This appointment takes place via a live video call with Trexo’s team.
Prior to the delivery of your Trexo, you will need to complete a detailed assessment. This will help to ensure they’re a good candidate for the device. You will be asked for the following information:
- Hip and knee contractures
- Hip sublaxation or dislocation
- Spasticity level
- Seizures
- Head and neck control
- Any other conditions which may interfere with your child’s ability to use the Trexo
After this you will get updates on the delivery timeline of the Trexo until it get delivered to you.
Once you receive the Trexo you will have a Trexo training where we will fit the Trexo for your child. By the end of this, your child will use the Trexo to walk. This is meant to help you determine the settings which match your child and whether it is a good fit. You may invite your child’s physical therapist to this appointment as well.
Trexo grows with your child
We will train you on the basics of running a Trexo session. The training includes teaching you how to adjust the Trexo as your child grows so they always fit properly! Remember you have access to our live support, especially to help with adjustments for your child’s growth.
Interested in learning more about how the Trexo can change with your child? Read about the many Trexo features to keep you child engaged.
Start your Trexo journey today!
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