ABU - ASALKAN BUKAN UMNO

ABU - ASALKAN BUKAN UMNO

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Wednesday, February 29, 2012

‘Hundreds of thousands’ fitted with suspect hip implants

Sulaiman Kamal | 2:51 PM | | Best Blogger Tips

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The risk of leakage from cobalt-chrome implants has been known since 1975, when doctors discovered that local tissue reacts to ions, or charged atoms, from these metals. — shutterstock.com


PARIS, Feb 29 — Hundreds of thousands of people have been fitted with replacement hips whose flawed design may be exposing them to toxic metal, according to a probe by the BBC and the British Medical Journal (BMJ) unveiled yesterday.


The risk of leakage from cobalt-chrome implants has been known since 1975, when doctors discovered that local tissue reacts to ions, or charged atoms, from these metals, the investigators said.
“The ions can also leach into the bloodstream spreading to the lymph nodes, spleen, liver and kidneys before being excreted in urine,” the BMJ said.
Lab research has also linked cobalt to a heart condition called cardiomyopathy and identified chromium ions as a probable carcinogen, it said.
The BMJ and the BBC news programme Newsnight said they had seen a DePuy internal memo from 2005.
“In addition to inducing potential changes in immune function, there has been concern for some time that wear debris may be carcinogenic,” the memo reportedly said.
Despite this, “DePuy’s marketing of metal-on-metal hips continued unabated, with promotional material failing to reflect internal company concerns,” the BMJ-BBC probe charged.
In 2010, DePuy withdrew its ASR hip prosthesis and promoted another design called Pinnacle as “an alternative for the majority of patients.”
But Pinnacle too had metal-on-metal problems and the following year, British researchers warned the national health safety watchdog of failures with this model, the report said.
There was no immediate response from DePuy to the allegations.

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