RESUMO
Biocompatibility is the essential property of biomaterials, which is the essence of biomaterial evaluation as well as the foundation of the design and improvement of biomaterials. Several methods were carried out to evaluate the biocompatibility of poly(L-Lactide)-b-poly(trimethylene carbonate (PLLA-b-PTMC) and poly(D,L-Lactide)-b-poly(trimethylene carbonate) (PDLLA-b-PTMC) with poly(L-Lactide) (PLLA) and poly(trimethylene carbonate) (PTMC) as control, including extract liquid experiment, directly contact experiment of materials and cells, hemolytic ratio analysis and platelet adhesion investigation. The results revealed that all the materials exhibited an acceptable cytotoxicity, and proliferation of cells on the modified materials was less than that on the PLLA but more than that on PTMC. The results of hemocompatibility experiments showed that no significant hemolysis was detected when all the materials were in use; in addition, the numbers of platelets adhered on the surface of copolymers were smaller than that on the surface of PLLA, and the degree of platelet deformation was slighter. So, the biocompatibility of copolymers is similar to that of PLLA, the biocompatibility of PLLA is not remarkably changed by modification with PTMC, but rather is improved.
Assuntos
Humanos , Implantes Absorvíveis , Materiais Biocompatíveis , Química , Metabolismo , Plaquetas , Biologia Celular , Dureza , Ácido Láctico , Química , Metabolismo , Teste de Materiais , Poliésteres , Química , Metabolismo , Polímeros , Química , Metabolismo , Engenharia Tecidual , MétodosRESUMO
Objective To study the mini-invasive surgical treatment for cholelithiasis disease in the primary hospital. Methods Laparoseope,duodenoscope and choledochoscope were combined to treat 293 cases with cholelith-iasis which included 2 cases cholecystolithisasis, 131 cases were cholecystolithiasis with secondary choledocholith,28 cases with primary choledocholith,39 cases with calculus of intrahepatic duct,93 cases with calculus of intrahepatic or extrahepatic duct. Results The program had minor trauma, mild suffering, and less operative complications,compared with traditional open operations. Conclusion The combined treatment of laparoscopy, duodenoscopy, choledochoscope and surgery for the cholelithiasis in the primary hospital is feasible, safe and effective.