Rehabilitation protocols for post-operative flexor tendon repair continue to advance! As surgical techniques improve with better visualization instruments and advanced suturing techniques, new approaches to post-operative rehabilitation are emerging.
Even so, one constant in all rehabilitation protocols has remained the Dorsal Blocking Orthosis. A versatile splint that limits the amount of active and passive finger extension to prevent possible tendon rupture. Among the various regimens, though, the exact wrist and finger joint placement may differ.
In this article, we’ll review some of the basic therapeutic protocols for flexor tendon repair, including new advances. We’ve also added material recommendations and our top splinting tips for the dorsal blocking orthosis.
Each protocol requires specific wrist and finger positioning in the dorsal blocking orthosis. We’ve listed all details in the following overview:
A basic regimen of complete immobilization following surgical flexor tendon repair may be suitable for children that are unable to follow directions, elderly patients with cognitive deficits, and patients deemed to be non-compliant with exercises.
The Kleinert protocol was established to incorporate a dynamic pull on the involved finger(s). Accordingly, this would avoid tension on the sutured tendon.
Complications from this protocol, primarily PIP flexion contractures due to holding the injured finger in flexion all the time, contributed to the creation of another passive motion protocol called the Modified Duran Protocol.
Modified Duran Protocol
The original Duran orthosis stopped at the PIP joints in order to visualize full PIP extension during the exercises and included rubber band traction, which was eliminated in the modified Duran orthosis.
The Indiana Protocol is classified as an Early Active Mobilization protocol. It is generally a great option for clients who demonstrate minimal edema and minimal complications. It relies on a strong surgical repair of 4 strands across the tendon plus an epitendinous suture.
The Manchester Protocol is appropriate for patients following surgical repair of flexor tendon lacerations in Zone 2, treated with a 4 strand surgical repair.
A recent study compared patients treated with this short orthosis protocol to patients treated with the traditional forearm based orthosis. The researchers found that the short orthosis favored an improved PIP flexion arc early on, with a greater gain in DIP flexion at the final comparison.
The St. John Protocol is implemented following a wide-awake surgical repair of the lacerated tendon. This surgical technique allows the surgeon to address gapping of the tendon during active movement. Additionally, the surgeon can make sure that there is sufficient gliding of the repaired tendon underneath the finger pulleys while the wound remains open. Find out more about this protocol here.
New evidence gained from the wide-awake surgical procedure indicates that “place and hold” exercises cause a “buckle and jerk” motion, placing stress on the repaired tendon. Active motion into ½ of a full fist, on the other hand, allows gentle gliding of the tendon without added stress.
A new retrospective study looked at patients following surgical repair of flexor tendons in Zone II. These patients were treated with a relative motion flexion orthosis in combination with either a dorsal blocking orthosis or wrist orthosis.
At 3 weeks, the patients continued with only the relative motion orthosis during the day. They included the larger orthosis at night and during activities of risk until 6 weeks post-op. After this period, the patients wore the relative motion orthosis by itself for an additional 2-4 weeks. The patients in this small study did well with no ruptures and no complications.
Disclaimer: It is important to discuss each individual patient with the referring surgeon to determine which rehabilitation protocol to follow. Use these protocol descriptions as guidelines that can be modified based on a patient’s exact requirements and needs.
Dorsal blocking orthoses are placed over the dorsum of the forearm, wrist, and digits and therefore place stress over the ulnar head, the flexed MP joints, and the dorsal PIP and DIP joints. In general, a conforming material will drape and capture the shape of these bony landmarks and prevent stress and shearing forces.
You can use a heat gun to further bump out these spots on the orthosis. Another tip is to place a piece of Theraputty (or a small piece of non-stick thermoplastic) over the ulnar head and form the dorsal orthosis over this putty, creating a larger bumped out spot. You can remove the putty from the inside when the orthosis has hardened. Be sure to use a non-stick coated material, and rub a little lotion over the putty to prevent adherence.
Consider using a material with adequate memory, as the orthosis may require further modifications to alter the wrist position and to help reduce edema.
Orfilight, Orfilight Atomic Blue NS and Orfilight Black NS: extremely lightweight and highly conforming, which makes them perfect for the fabrication of these types of orthoses. Thanks to the stretch, these materials contour well to the anatomy and make the fabrication process considerably easier.
Note: These products come in three thicknesses and different perforation patterns.
Orthoses made from Orfilight products are comfortable and supportive without adding additional weight to the injured body part. Orfilight products feel light and foamy during the orthotic fabrication, but are strong and maintain the specific desired posture when hardened.
Orficast: ideal for the fabrication of the relative motion orthosis. This orthosis can be part of a newly described protocol for Zone II repairs as well as helpful at addressing PIP flexion contractures. For contracture management, position the MCP joint of the involved finger in flexion to elicit the transmission of force towards active PIP extension.
Orficast More 15 cm (6″): Try this material for the shorter dorsal blocking orthosis as described in the Manchester protocol. In general, Orficast More is highly conforming and lightweight, yet rigid enough to maintain the desired hand and wrist positions as outlined.
Watch this video for more tips on fabricating a dorsal blocking orthosis:
Henry, S. L., & Howell, J. W. (2020). Use of a relative motion flexion orthosis for postoperative management of zone I/II flexor digitorum profundus repair: A retrospective consecutive case series. Journal of Hand Therapy, 33(3), 296-304.
Higgins, A., & Lalonde, D. H. (2016). Flexor tendon repair postoperative rehabilitation: the Saint John protocol. Plastic and Reconstructive Surgery Global Open, 4(11).
Neiduski, R. L., & Powell, R. K. (2019). Flexor tendon rehabilitation in the 21st century: A systematic review. Journal of Hand Therapy, 32(2), 165-174.
Peck, F. H., Roe, A. E., Ng, C. Y., Duff, C., McGrouther, D. A., & Lees, V. C. (2014). The Manchester short splint: a change to splinting practice in the rehabilitation of zone II flexor tendon repairs. Hand Therapy, 19(2), 47-53.
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”.