Ryan Caldwell, L/CP


Ryan Caldwell, L/CP


Ryan is an ABC-certified prosthetist for Hanger Clinic in Schaumburg, Illinois.

As a clinician with over 20 years of experience in the field and second generation prosthetist, Ryan is a field expert for advanced lower limb prosthetic sockets with the use of active vacuum technology. Active vacuum technology allows for early prosthetic intervention, improved limb health, superior suspension, and new socket techniques. Ryan was the key clinical developer of the NU FlexSIV socket which utilizes active vacuum technology for the transfemoral patients. This revolutionary system has gained worldwide interest and support by clinicians, physicians, and prosthetic manufacturers as an alternative to traditional socket technology.

Ryan is also a research prosthetist for Northwestern University. His team has been awarded over six millions dollars in grants from the National Institute of Health and the Department of Defense. He has been invited to collaborate with the University of Washington and the University of Illinois at Chicago on additional projects and grants. Ryan is also adjunct faculty and visiting scholar at Northwestern University Prosthetic-Orthotic Center where he established the active vacuum course in 2008. His curriculum was the first comprehensive theoretical and hands-on module for the cutting edge active vacuum fittings. Ryan teaches his theories and clinical use of active vacuum technology for transtibial, transfemoral, and partial foot patients nationally and internationally.

Ryan is a frequent guest lecturer and invited speaker at international and national conferences, including the International Society of Prosthetics and Orthotics and the Orthopedic Technik World Congress. Ryan in conjunction with Northwestern University currently provides international and national courses to teach the NU FlexSIV socket technology to prosthetists. The goal is to disseminate this new technology internationally so patients can continue to progress and increase their quality of life. He has also co-authored many peer-reviewed journal articles which have been published in a variety of allied health and engineering journals.

Outside of work, Ryan enjoys spending time with his family and traveling across the world.


  • Prosthetic Certification, Northwestern University, 2003


  • Fellow of the American Academy of Orthotics and Prosthetics, 2013

Clinic Locations

Schaumburg Schaumburg
1701 E Woodfield Rd,
Suite 555
Schaumburg, IL 60173
Fax: (847) 619-1702

The Hanger Clinic Experience

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