The present invention application are used to the retractor , and the pressure plate , on non-invasive chest plate for hemostasis comprising a holding device installed in the pressure plate . A pressure plate with a holding device , can be disposed sternum became blade or half of patients of the retractor and thus the pressure plate , expanding a patient's sternum with the retractor when you , abuts the sagittal incision surface of the sternum , which is half of the patients . [ Selection Figure ] FIGS. 4A, 4B
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