Moving the frame inside the elbow
A chronic elbow dislocation or fracture-dislocation — one that is more than two weeks old — is one of the genuinely difficult problems in orthopaedics. By that stage the joint is filled with adhesions, tendons are shortened, and fractures have healed in the wrong position. Treatment has traditionally relied on hinged external fixators: frames that sit outside the arm for weeks or months. They work mechanically, but they are painful, pin-site care is demanding, and they interfere badly with daily life.
The elbow team at Beijing Jishuitan Hospital — Professor Jiang Xieyuan, the hospital's president and China's leading elbow specialist, together with Professor Cha Yejun — reports treating two patients with a self-developed internal elbow fixator: essentially, the hinged frame moved to the inside of the body, paired with a rotation-centre targeting guide for accurate placement.
The two reported cases
The first patient was a 40-year-old woman left with an unstable, weak elbow after limb-salvage surgery for an open, near-amputation injury; several hospitals had been unable to help. On 2 April 2026 the team performed ligament reconstruction with internal fixator implantation. At her 40-day review she had fully recovered her range of motion and stability — better than the team expected.
The second was a 51-year-old woman whose elbow had been fractured and dislocated for nearly a year and sat locked almost straight, with an old radial head fracture. On 13 April 2026 she underwent a single-stage reconstruction: release of the stiff joint, reduction of the old dislocation, triceps lengthening, ulnar nerve release, radial head replacement, ligament repair and internal fixator implantation, followed by three weeks of protection. Thirty days after surgery, one week out of her brace, she had regained a good bend and a stable joint, with no implant irritation.
Two successfully treated patients demonstrate feasibility, not effectiveness at scale. The hospital states that the internal fixator and the rotation-centre targeting guide are covered by multiple patents, that technology transfer has been completed, and that the product will reach the market only after full clinical research is finished. It is not currently a standard, available option.
Why the approach matters
For decades the surgical answer to chronic elbow instability has been "apply a hinge outside the arm and wait". An internal hinge that spares patients the external frame addresses the part of this treatment patients hate most. If subsequent clinical research confirms the early experience, it would be a meaningful option for a condition with few good answers anywhere in the world.
Relevance to elbow injury patients
Chronic elbow instability and stiffness after old injuries are among the problems international patients travel for, and Jishuitan's elbow unit is among the largest anywhere. International patients should read this as a research development to ask about, not an available implant: the device is not yet on the market. This summary belongs to the Bones, Joints, Spine & Muscles health area.