Hundreds received faulty hip-joint implants

Some 300 Czech patients have received low-quality hip-joint implants, the manufacturer Depuy has announced. The Johnson & Johnson subsidiary says the full implants have decreased durability and may release heavy metals such as cobalt. Some recipients have suffered medical problems requiring further treatment, the company told Czech Television. Patients with the implants will undergo blood tests and more frequent check-ups; doctors say replacement operations are not necessarily needed.