The Heparin Litigation continues to move ahead, in spite of the efforts of Baxter and SPL to avoid responsibility for their misdeeds. Recently I took the deposition of Dr. Francois Lebel, Vice President for Baxter. Next week we depose Ted Roseman, a former Baxter official also involved in the heparin investigation.

The overriding principle of the litigation so far has been the refusal of Baxter to accept responsibility for its product, and the refusal of Baxter to admit the obvious: that their contaminated heparin killed hundreds of people.

A recently published article on contaminated heparin authored by one of Baxter's own experts, Robert Linhardt, stated:

The presence of OSCS within heparin likely led to clinical manifestations, most prevalently, hypotension and abdominal pain, leading to the deaths of several dozens of patients.

The actual FDA count, which is only a fraction of the actual number, is well over 100 deaths associated with the contaminated heparin. Yet Baxter continues to deny that anyone died or became ill from their contaminated product. They claim they have no responsibility because their product met the then current specifications.

Other manufacturers were performing tests for purity and did in fact detect the contamination, saving the lives of their customers. Yet Baxter claims it had no duty to do so. Published literature shows that at least since 1989 the existence of contaminants such as dermatan sulfate in heparin were known and identified through NMR analysis. For years the literature has encouraged NMR analysis of heparin. But Baxter never tested any of its heparin by NMR.

Other recent articles and research by Dr. Fareed of Loyola and others have established that the contaminated heparin contained more contaminants than just oversulfated chondroitin sulfate (OSCS), and in fact that the contamination was done intentionally and by someone with a high level of knowledge about heparin anticoagulation properties and molecular structure.

The Lindhardt article quoted above was based on research done by Baxter in an effort by Baxter to prove that their supplier, SPL, did not manufacture the contaminant from heparin byproduct. Heparin byproduct is the waste material generated in the refining of heparin crude into heparin API (active pharmaceutical ingredient).

Heparin byproduct, like the heparin crude, contains a number of glycosaminoglycans (GAGs). These sugar molecules include heparin, heparan sulfate (HS), dermatan sulfate (DS) and chondroitin sulfate (CS). Some scientists have found evidence of all of these heparin byproducts in various lots of contaminated heparin, often in an oversulfated form.

The oversulfated forms are not found in nature. Rather they are created by chemical sulfation. It is also possible, and indeed likely, that the sulfation step was followed by a desulfation step, thus making the number of sulfation units on the various sulfated GAGs more uniform. This step would have made the contaminant even more difficult to detect, and may even assist in more uniform anticoagulation. As pointed out by Dr. Lindhardt and his coauthors (see page 5 of the article) partially sulfonated GAGs, especially heparan sulfate, are difficult to detect and separate from heparin, even using modern detection techniques. These experts should know. Some of them hold patents on the sulfation / desulfation of GAGs.

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