JAS range

JAS range of devices

All JAS devices are designed to be easy to apply, comfortable to wear, and simple to use. JAS device technology enables total patient control of their ROM therapy. Patient compliance directly equates to better results and successful rehab outcomes. Watch Jane's story of her total knee replacement and her JAS journey, post-op, to date:

What is Static Progressive Stretch (SPS)?

Static Progressive Stetch utilises the application of stress relaxation loading in a series of positional (displacement) changes. Stress relaxation applies a stretching load to a visco-elastic material (connective tissue) to reach the displacement of a desired resistance. That displacement is held constant, so over time the connective tissue in a joint stretches and resistive loads drop (laxity. Once desired resistance is achieved, the new displacement is held constant until resistive load drops again.

What is Stress Relaxation and Low-Load Stretch?

Stress Relaxation and Low-load Stretch is defined as the reduction of forces over time in a material that is stretched and held at a constant length. This is the very same force load that forms the basis for manual physical therapy stretching techniques and the decades-old turnbuckle orthotic correction techniques. These are used to apply stress relaxation loading using low intensity force to position a joint at its end range and to hold joint tissues at their maximal therapeutic length.

As tissues lengthen in response to the applied stress, the device is adjusted to position the joint tissues at their new maximal therapeutic length. This process is repeated several times during a treatment session, and sessions are performed three times daily to achieve steady increases in joint ROM.

When to initiate JAS therapy

What factors contribute to ROM deficit?

"Arthrofibrosis is a fibrotic joint disorder characterised by excessive collagen production and adhesions that result in restricted joint motion and pain. It can occur in most joints and is referred to by a number of names, including frozen shoulder, adhesive capsulitis, joint contracture, stiff knee and stiff elbow. Sterile arthrofibrosis is typically caused by chronic or repetitive injury or surgery that leads to a dysregulated immune reaction and fibrosis in and/or around the joint to varying degrees. The fibrotic scar tissue that forms in the joint is known as extracellular matrix (ECM) and is primarily composed of collagen."

Pathological mechanisms and therapeutic outlooks for arthrofibrosis - Kusha et al: Nature - Bone Research (2019) 7:9

JAS should be used before further surgery or an MUA

What does the patient need to do for pain free stretch?

JAS devices allow patients total control in carrying out their ROM therapy. Because patients control the intensity of stretch, muscle guarding is virtually eliminated. The patient is to wear the JAS device at rest and the recommended timings are for 3 x 30-minute sessions per day.

Step One

• Rotate therapy knob until a gentle, pain-free stretch is felt.
• Attempt to achieve Level 2-3 on stretch intensity scale of 1-10 (1 = no stretch | 10 = painful stretch).

Step Two

• Hold stretch position for 5 minutes. Before turning the knob, re-assess stretch level:
• If stretch has decreased, rotate knob until you feel a level 2-3 stretch again.
• If stretch intensity has not changed, leave in same position.
• If stretch has increased, rotate knob in opposite direction until a level 2-3 stretch is felt.

Step Three

• Hold the stretch for another 5 minutes.
• Repeat process for 6 stretches to complete a 30-minute therapy session.

How to apply and use:

Fitting videos

Adult and paediatric range

JAS devices are available for all of the following joints:

JAS Paediatric range of devices

Features and benefits of JAS

JAS devices offer full-range, bi-direction Range of Motion (ROM) therapy in a lightweight, low-profile design, reinforced for additional durability and offers a greater arc of motion than any other brand of stretch device.

Restoration of joint ROM is a critical first step in the rehabilitation process for all patients. Tissue changes happening post-surgery and through the proceeding three months is the ideal time period for JAS therapy. The earlier you address tissue changes, the faster you will reverse it.

Measurement and Order Forms

Each device is assembled to order and you will need to take the measurements, depending on which column is relevant to you.

Click here to download the Upper and Lower Extremity Device Measuring and Order Form.

Further Downloads:

Do you need support?

Please contact our medi Customer Service department for advice on products, best practices or questions.

FAQs

^{*30+ peer-reviewed studies definitively show that JAS SPS therapy, providing low load stretching forces, are effective at restoring ROM in a wide variety of conditions, including knee arthrofibrosis. These studies absolutely disprove claims that effective therapy for stiff fibrotic joints can only be achieved with high torque, short duration stretch devices. JAS products provide safe and effective ROM restoration for all levels of joint stiffness.}