Dysphagia increases the risks of mortality and palindromia post stroke, and influences the rehabilitation and quality of life. All the patients with stroke need a set of clinical screening, and those positive would accept comprehensive evaluation, both bedside and lab-oratory. Many approaches have been used for dysphagic rehabilitation, but it is not clear what the best is.

Objective To explore the long term mutagenic and carcinogenic effects of endemic arsenism Methods The micronuclei and chromosomal aberration in peripheral blood lymphocytes were detected by conventional micro whole blood culture method among 112 subjects with endemic arsenism and 88 healthy residents as controls Results Significantly higher frequencies of chromosomal aberrations(1 0770‰?0 1953%) and micronuclei(0 8547‰?0 0567‰) of peripheral blood lymphocytes were observed in arsenic poisoned group compared with those(0 4286‰?0 1241%,0 3928‰?0 0368‰) of controls respectively ( P