“Most other eye banks use Povidone Iodine.”
“The decontamination procedure after collection of a corneal graft must include an anti-bacterial agent that is able to kill Pseudomonas, even where a biofilm was present. It has been known for many years [at least since 1993] that PI was much more effective than antibiotics for this process, as it can penetrate a biofilm.”
“Do you consider there was a negligent failure to avoid the possibility of infection from the donated tissue?”
“In view of the many reports since 1993 that Povidone-Iodine is much superior to antibiotics for decontamination for donor eyes, I regard the decontamination procedure in MEH in July 2001 to be below the reasonable standard to be expected of an institution such as MEH. Therefore there was a negligent failure to avoid the possibility of P aeruginosa infection from donated tissue of Mrs Ndri.”
“P aeruginosa is widely found in any moist area and is able to form a biofilm, which protects these bacteria from the penetrating action of antibiotics, but not povidone-Iodine. Since 1993 there have been numerous reports of the superiority of povidone-Iodine over antibiotics for the decontamination of donor eyes, and all other Eye Banks in England use povidone-Iodine. By 2001, MEH had not updated their decontamination procedure for donor eyes with povidone-Iodine to ensure that all bacteria, including P aeruginosa were killed off before the operation of keratoplasty. My conclusion is that the decontamination procedure in MEH in July 2001 was below the reasonable standard to be expected of an institute such as MEH.”
“When the cornea is transplanted the recipient is given antibiotics to try to prevent any bacteria present causing any infection. Pseudomanas aeruginosa has PPI environmental bacteria, which are characteristically resistant to many anti-bacterial agents, and so tend to cause infections in patients who have already received many courses of antibiotics. They are all also resistant to some antiseptic agents. The agents used for disinfecting eyes prior corneal banking can be either antibiotics such as Framycetin, or Gentamycin, or disinfectants such as Povidone-Iodine. Both strategies have advantages and disadvantages. If antibiotics are used some colonising bacteria may be resistant to them, and the persistence of bacteria may occur. Antiseptics have a broader spectrum of antimicrobial activity, but most are deactivated by contact with organic material, and the Iodine can potentially cause staining.”
“Most studies suggest that the use of Povidone iodine reduces the rate of contamination prior to storage, to 35 per cent at best.”
“One paper does not mean that you alter your opinion as to the proper practice.”
“Decontamination before eneucliation was performed by 37 banks using different methods: rinsing with saline; Povidone-Iodine; antibiotics; Povidone iodine and antibiotics or ethanol”
“In most cases with PVP Iodine, concentrations varying from 0.5 per cent to 10 per cent, sometimes antibiotics, sometimes a combination of both were used. Before the excision of the cornea sterile button in the eye bank the bulbs were decontaminated by rinsing with either tap water, or sterile saline, or immersion with PVP Iodine 0.2 to 5 per cent, antibiotics, or a combination, sometimes preceded by running tap water, or running sterile saline.”
“There are a large number of eye banks world wide, and although the general principles of eye banking are the same and applied across the world, many individual variations exist. The practice followed by Moorfields Eye Bank, that of cold storage in Optisol GS is not unique and is the practice of some banks in Europe, and almost all across North America where approximately 30 to 40 thousand corneal transplants are performed annually.”
“I, myself, would prefer to put it this way, that he is not guilty of negligence if he has acted in accordance with a practice accepted as proper by a responsible body of medical men, skilled in that particular art. ... Putting it that other way round, a man is not negligent, if he is acting in accordance with such a practice merely because there is a body of opinion which would take a contrary view.”
“These decisions demonstrate that in cases of diagnosis and treatment there are cases where, despite a body of professional opinion sanctioning a defendant’s conduct, a defendant can properly be held liable for negligence. (I am not here considering questions of disclosure of risk). In my judgment that is because in some cases, it cannot be demonstrated to the judge’s satisfaction that the body of opinion relied upon is reasonable or responsible. In the vast majority of cases the fact that distinguished experts in the field are of a particular opinion will demonstrate the reasonableness of that opinion. In particular where there are questions of assessment of the relative risks and benefits of adopting a particular medical practice, a reasonable view necessarily presupposes that the relative risks and benefits have been weighed by the experts in forming their opinions. But if, in a rare case, it can be demonstrated that the professional opinion is not capable of withstanding logical analysis, the judge is entitled to hold that the body of opinion is not reasonable or responsible. I emphasise that in my view it will very seldom be right for a judge to reach a conclusion that views genuinely held by competent medical experts are unreasonable. The assessment of medical risks and benefits is a matter of clinical judgment which a judge would not normally be able to make without expert evidence.”
“In view of the many reports since 1993 that povidone iodine is much superior to antibiotics for decontamination of donor eyes.”
“A tragedy waiting to happen.”
“I have reached the firm conclusion that I prefer the evidence of Professor French. I found him to be a balanced and non-partisan witness. I regret to say I found Professor Goodwin to be, in some ways, an unsatisfactory witness. His evidence, in some respects, lacked objectivity and he appeared to see his role, in part, as an advocate for the Claimant. I have already mentioned that his evidence was not always consistent with what he said before.”
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