Mobilization Orthoses to Increase Joint Range of Motion

Dynamic, static progressive or serial static: when to use which?

Mobilization orthoses are an excellent tool to help patients regain passive joint motion. They are often used to treat patients with very stiff joints following injury or prolonged immobilization.

As a therapist, you can choose between the following types of mobilization orthoses:

  • Dynamic
  • Static progressive
  • Serial static

But how do you decide which type to use? In this blog post, we offer an evidence-based assessment to help you in this decision-making process. But first, let’s review the different types of mobilization orthoses.

 

.
Types of mobilization orthoses

Dynamic

Dynamic orthoses typically incorporate elastic components and coils or springs. These put tension on a joint to increase passive range of motion.

Aside from that, dynamic mobilization orthoses can also be used to assist with weakened muscles or paralyzed nerves. They are often applied to aid in functional activities, such as with peripheral nerve injuries where muscles are weakened or paralyzed.

Functional Ulnar Nerve Orthosis in Orfit Colors NS - Sonic Silver

Functional Ulnar Nerve Orthosis in Orfit Colors NS – Sonic Silver.

The springs and/or coils can help substitute for the weak or paralyzed muscles, which is very helpful in cases of radial, ulnar, or median nerve palsy.

Dynamic mobilization orthoses can also be used with stiff joints that lack a full range of motion.

 

Static progressive

Static progressive orthoses incorporate non-elastic components. They apply force to a joint to hold it in its end range position to improve passive joint range of motion.

Examples of these static components are:

  • Gears
  • Monofilaments
  • String or fishing lines
  • Velcro® hook and loop tape
  • Turnbuckles (devices which allow for regulation of tension)
Static progressive mobilization orthosis in Orficast 3 cm.

Static progressive finger flexion cuff in Orficast 3 cm.

Static progressive orthoses allow progressive changes in joint position. This happens as the passive range of motion of the involved joint changes and improves over time.

 

Serial static

Serial static orthoses hold a stiff joint or tight shortened tissue in its end range position to increase passive range of motion or tissue length.

Every few days or even once a week, the therapist removes the orthosis and performs treatment to the stiff or contracted joint. Then they apply a new orthosis to the client in a new end range position.

Static progressive mobilization orthosis in Orficast 3 cm.

Static progressive mobilization orthosis in Orficast 3 cm.

Serial static orthoses are very useful in the treatment of stiff joints:

  • PIP joint flexion contracture
  • Extrinsic wrist tightness following fractures/trauma
  • First web space tightness following trauma/fractures

 

So, which one do you choose?

Depending on the patient and the specific injured joint, the therapist can decide on one of these orthoses. All three of them help to regain tissue length and improve joint range of motion.

For example, a dynamic orthosis might be the solution for patients with nerve palsy (e.g. radial nerve palsy) and/or weakened muscles, because these types of orthoses can allow for functional motion.

Selecting the most appropriate mobilization orthosis for your client is an important decision. It should be based on sound clinical reasoning and supporting evidence.

 

.
Evidence-based assessment

The following information can help you decide on an appropriate orthosis for your patient.

 

Soft End Feel vs. Hard End Feel

When assessing a patient with a stiff joint and/or limited joint range of motion, you can subjectively determine whether the specific joint has a soft end feel or a hard end feel.

End feel is the type of resistance felt when passively moving a joint through the end range of motion. You can evaluate the type of end feel by applying pressure to the joint at the end of the available passive range:

 

Soft end feel

The soft tissues give way with a small amount of pressure

The soft end feel can be described as a joint with immature scar tissue in the joint structures. You can choose any type of mobilization orthosis to address the limitations in motion.

 

Hard end feel

You need firm pressure to mobilize the joint further than the limitation.

The hard end feel can be described as a joint with mature scar tissue. It might respond best to serial static or static progressive orthoses.

 

The Modified Weeks Test

The Modified Weeks Test is an assessment that you can do before orthotic fabrication. It helps to clarify what type of mobilization orthosis may be most appropriate for your patient.

The test follows a few steps:

  1. First, the therapist performs a “cold reading” of the stiff joint’s passive range of motion.
  2. Then, the patient places their hand in a heated modality such as a fluido-therapy unit or a heated whirlpool. In this way, the stiff joint can be mobilized for 20 minutes.
  3. The therapist places the stiff joint in its end range position. This involves a tolerable over-stretch and heat application for another 10 minutes.
  4. After the 30 minutes of heat and mobilization, the therapist takes a “preconditioned reading” to measure the passive range of motion.
  5. Finally, the therapist compares the “preconditioned reading” to the “cold reading”.

The difference between the two passive joint range of motions (preconditioned and cold reading) can influence the orthotic selection:

Modified weeks test to choose the right mobilization orthoses.

The Modified Weeks Test helps you choose the most suitable mobilization orthosis.

 

The author Ken Flowers proposed this decision making assessment in 2002, but stated that he had little evidence to support it. However, Glasgow et al. also used this assessment in their study on dynamic orthoses for stiff finger joints in 2011. They found it to be an accurate and reliable measure.

 

In conclusion

Using an evidence-based method can assist you in your clinical decision making. You can apply it the next time you have a patient with a stiff joint and you are considering an orthosis to help regain passive motion.

The possibilities are endless when it comes to dynamic splinting. Have a look at our Dynamic Splinting Guides for inspiration.

 

References

> Flowers, K (2002). A proposed decision hierarchy for splinting the stiff joint, with an emphasis on force application parameters. Journal of Hand Therapy15(2), 158-162.

> Glasgow, C., Tooth, L. R., Fleming, J., & Peters, S. (2011). Dynamic splinting for the stiff hand after trauma: predictors of contracture resolution. Journal of Hand Therapy24(3), 195-206.

> Schultz-Johnson, K. (2002). Static progressive splinting. Journal of Hand Therapy15(2), 163-178.

 

Debby Schwartz portrait

Written by Debby Schwartz, OTD, OTR/L, CHT

Physical Rehabilitation Product and Educational Specialist at Orfit Industries America.

Debby is a certified hand therapist with over 36 years of clinical experience. She completed her Doctorate of Occupational Therapy at Rocky Mountain University of Health Professions in 2010. She has worked at Orfit Industries America as Product and Educational Specialist since 2007.

Debby is also an adjunct professor at the Occupational Therapy Department of Touro College in NYC and has written many book chapters in the field of hand therapy and multiple articles for hand therapy journals, including the ASHT Times and the Journal of Hand Therapy. She has published a new textbook on orthotic fabrication together with Dr. Katherine Schofield, entitled “Orthotic Design and Fabrication for the Upper Extremity: A Practical Guide”.

 

Subscribe to our mailing list

* indicates required
Select your preferred newsletters

The protection of your personal data is our priority. Thank you for subscribing to one of our newsletters. We would like to invite you to share some personal data with us. The protection of this data is our priority.

By submitting this form, I agree to the processing of my data to receive personal messages by mail.

You can change your mind at any time by clicking the unsubscribe link in the footer of any email you receive from us, or by contacting us at welcome@orfit.com. We will treat your information with respect. For more information about our privacy practices please visit our website. By clicking below, you agree that we may process your information in accordance with these terms.

We use MailChimp as our marketing automation platform. By clicking below to submit this form, you acknowledge that the information you provide will be transferred to MailChimp for processing in accordance with their Privacy Policy and Terms.

We've selected some similar articles for you
The Current Evidence for Static Progressive Orthoses for the Upper Extremity
Article by Debby Schwartz published in the ASHT Times Jan 2016
Download the entire study (PDF) here >> Static progressive orthoses is a type of mobilization orthosis that therapists use to help their clients regain passive motion in stiff joints and tissues.This type of orthosis incorporates non-elastic components to apply force to the stiff joint or tissue, holding…
Read more