It is prominent to use cancer patient's cornea " The cornea is neglected "

It is prominent to use cancer patient's cornea " The cornea is neglected "
Staff reporter Yan � Cancer patient's cornea can learn the cornea disease group's committee member Pan ZhiQiang how to say with the director of eye bank of Beijing Tongren Hospital, Chinese ophthalmology department, " the eye bank managed the standard " to define the taboo that the cornea is transplanted in Ministry of Public Health implemented from March 1 this year, mainly include infectious disease and acute leukemia that acute virus hepatitis, rabies, gram are refined and ill,etc., acute and sow the scattered lymphoma etc., have not mentioned in the medical textbook " Malignant tumour especially doing the radiotherapy for a long time or the therapeutic one of long-term applied chemistry " . "While drafting this file, have discussed the question that the malignant tumour patient's cornea could be transplanted too. " Pan ZhiQiang introduces, according to the statistical report of American eye bank of 2009, the cornea that will die of disease in 2009 will support the body total number to be 53786 people, 10002 people among them died of cancer, accounts for 18.6% of the total number. U.S.A. has carried on a research, it is of different whole body malignant tumour to suffer from and support 73 patients of a cornea of body to accepting, follow up a case by regular visits to 127 months on average, evidence does not prove the same malignant tumour will be transferred to any receptor at present. "It is rigorously enforced most that the management standard of the American eye bank is in the world, we have consulted their standard. The result of the discussion is, everybody thinks the cancer patient's cornea can be used. " Chinese medicine ophthalmology hospital chief physician Yin LianRong of academy of sciences in China tells reporters, the cornea does not have blood vessel and lymphocytic, close in the route that cancer shifts in other words, so the cancer patient's cornea should be OK. Pan ZhiQiang tells reporters, whether the cancer patient's cornea can be used, the dispute lies in a bit more thoroughly, cancer cornea of patient could the whole layer of corneas gone on for resuming eyesight to use for transplant. Because used for mending the cornea the intersection of board and layer transplant and use the dry cornea generally, and the dry cornea should be through taking off water treatment, so can well use the cancer patient's cornea. The whole layer of cornea carried on for resuming eyesight is transplanted, should be cautious while using cancer patient's cornea. Which kind of supports the body no matter the cornea comes from, pass strict quality testing first, including microorganisms such as cornea density measuring, B-mode hepatitis virus of endothelial cell,etc. sift checking. Find that not up to standard or the indeterminate supporting the body of cause of the death, does not use absolutely. Most eye banks are singing " Empty-city stratagem " In fact, employ cancer behind the cornea that patient donate on being clinical, " the cornea is neglected " Helplessness reality. Pan ZhiQiang says, our country exceeds the blind patient of 2 million corneas at present, but only cornea blind patients of 3000 to 5000 can accept the cornea is transplanted every year. Take Beijing Tongren Hospital as examples, more than 1000 people register and need to transplant the cornea at present, but will wait for 3 appropriately and support the body material at least. Pan ZhiQiang says, colleague's eye bank set up so far since 1990, 50,000 people have had will of donating the cornea, and the proportion donated actually is very small. In addition, investigation which persons who donates the will did revealed in 2003, 92.8% were the young people under the age of 25. "It is that distant water can not quench present thirst that this is donated to the cornea. " Pan ZhiQiang says, " our present propaganda is placed on the old community or hospice especially. But pass a few years' exploration, the result is still very unsatisfactory. " "The colleague eyes Curry keeps nearly 300 dry corneas now, it is out of question to be used in one layer of treating surgery of mending etc. of board. But can let the patient resume the visual fresh cornea, very scarce. " Pan ZhiQiang says, there are seven or eight large-scale eye banks of our country at present, small-scale eye banks are about 30. By the look of situation that he understands, most eye banks have sung " empty-city stratagem " . Animal's cornea utilizes studying to it is reported, transplant the predicament faced in order to tackle the cornea, the Ministry of Science and Technology, Ministry of Public Health,etc. are organizing pig's eyes cornea to transplant and study. But animal's cornea is transplanted and faced immune rejection, people and animals' suffering from several big problems such as disease propagating, ethics together. "Should solve the immune rejection first. " ZhiQiang Pan say, consider can transfer to people against duplicate virusing difficult to remove on the pig. This course is very complicated. He tells reporters, are still similar to the artificial corneas of the contact lenses at present, but the synthetic suitable most crowds of artificial cornea of this kind of macromolecule material, its organization is not sure. "All kinds of materials can not compare with the cornea that people donated. About 1/4 cornea blind patient child at present, cornea transplant can make the intersection of child and benefited life. " Pan ZhiQiang says.

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