Although Smith & Nephew’s Birmingham Hip Resurfacing System (BHR) differs from most metal-on-metal hip replacements because it was subjected to clinical trials prior to marketing, problems with the device have been reported. In fact, a recent study published in the Journal of Bone & Bone Joint Surgery has found that 28 percent of BHR recipients develop “pseudotumors” near their BHR hips.
Some Patients’ Pseudotumors Symptomatic
A pseudotumor is a tumor-like growth that is neither malignant nor infective. They form in the soft tissues near artificial implants. The researchers in the article conducted a cohort study of 125 BHR recipients (143 hips) in a hospital in The Netherlands between 2005 and 2010. They found that 40 hips in 39 BHR recipients (28 percent) tested positive for pseudotumors, 11 of which (7.7 percent of the total) caused ten recipients to suffer hip replacement problems. Symptoms included:
- Groin pain, discomfort
- Noticeable masses
- Paresthesia (prickling, itching sensations)
Patients with a serum cobalt level greater than 85 nmol/L were 4.9 times more likely to develop pseudotumors.
Overall, the 143 hips had a 12.5 percent failure rate after five years, which is similar to the initial estimates of the recalled DePuy ASR devices’ failure rates. Seven patients who received eight BHRs underwent a revision procedure (5.6 percent of the total) because of pseudotumor formation.
The researchers concluded, “In our opinion, patients with a symptomatic pseudotumor should have a revision, and patients with a BHR with complaints need to be screened for a pseudotumor. Serum cobalt and chromium ion levels may be used for screening, but we find CT to be the best technique for diagnosing pseudotumors,”
RLG Advocates for Smith & Nephew Hip Recipients
If you received a Birmingham Hip Resurfacing System and suffered some of the symptoms mentioned above, it might have been caused by the cobalt metal ions shed by the implant into your body. The implant was not designed to do this, so you might be able to hold the manufacturer accountable. The amount of compensation from a Smith & Nephew hip lawsuit can include damages for full medical expenses, lost earnings, pain and suffering, and other damages. For a free, private legal consultation with a lawyer from the Rottenstein Law Group, click on this link or call 1-877-544-1952.