Stryker Hip Replacement Side Effects
Stryker is one of the largest medical and orthopedic manufacturers in the world. Hundreds of Stryker products have found success. However, in 2012, the company recalled two faulty hip implant systems. The Stryker Rejuvenate and ABG II Modular-Neck hip stems were linked to a number of adverse reports and patient injuries. A number of patients experienced severe Stryker side effects due to the design of the implants.
Stryker Implant Design
Stryker side effects are primarily caused by the faulty design of the implants. Many hip implant systems feature a one-piece stem and neck built to fit patients. This is referred to as a monoblock design. However, the Stryker Rejuvenate and ABG II systems were designed to minimize bone stress and maximize stability. The Rejuvenate hip implant system was designed for younger patients. The devices promoted long-lasting benefits that provided patients with a better range of motion.
Due to these goals, the Rejuvenate and ABG II systems offered a number of neck and stem pieces. The Stryker Rejuvenate featured 8 left stems, 8 right stems, and 10 modular neck pieces. The Stryker ABG II system featured 6 stems and 16 necks. The devices offered a wide selection so that surgeons could customize the fit to each patient.
Stryker Corrosion and Fretting
The primary cause of Stryker side effects arises from the metal-on-metal component of the design. Both hip implant systems feature metal components that rub against each other during daily use. The Stryker systems were developed using a blend of titanium alloy that includes titanium, zirconium, molybdenum, and iron. While this blend was intended to be corrosion-resistant, patients soon found that it was not.
Over time, the metals began to corrode and fret inside that patient. As a result, metallic debris was released into the patient’s body. Ion generation also occurred as a Stryker side effect. These metallic debris and metal ions built up around the implant site in a number of patients. They were also deposited into the bloodstream of the patients.
Stryker side effects include the development of a condition called metallosis, or metal poisoning. Metallosis occurs when metal debris builds up in a patient’s soft tissues. Research indicates that the foreign bodies in this collection of metal debris cause a significant reaction at the implant site. Many metallosis patients experience extreme discomfort at the implant site. Swelling, pain, and fluid collection are common Stryker side effects from metallosis.
Stryker side effects of metallosis also cause tissue necrosis, or premature tissue death around the implant site. Metallosis may also cause osteolysis, or bone dissolution. Many patients reported the growth of pseudotumors near the Stryker implant site. Pseudotumors are soft tissue growths that resemble tumors.
Stryker Revision Surgery
An increasing number of patients undergo revision surgery due to Stryker side effects. The increasing number of adverse event reports led Stryker to recall the devices. The Stryker Rejuvenate and ABG II recall occurred in July 2012. Shortly before the recall, Stryker issued an Urgent Field Safety Notice to notify doctors and patients of the increasing reports of Stryker side effects.
Stryker revision surgery can be costly and painful for many patients experiencing Stryker side effects. Considering the invasive nature of a hip implant, Stryker revision surgery can be difficult to perform. Stryker encourages hip implant patients to speak with their doctor to determine whether they should consider revision surgery for their recalled Stryker implant.
Patients who experience the following Stryker side effects may require revision surgery:
- Increased difficulty walking
- Pain during walking
- Pain or swelling in the hip
- Infection or inflammation in the hip
- Popping or grinding sounds in the hip
- Dislocation of noticeable positioning issues