Objective To compare the difference of effect while using homograt pericardium patch and Gore-rex patch in staged complete repair for Tetralogy of Fallot （TOF） to enlarge the right ventricular outflow tract （RVOT）...Objective To compare the difference of effect while using homograt pericardium patch and Gore-rex patch in staged complete repair for Tetralogy of Fallot （TOF） to enlarge the right ventricular outflow tract （RVOT）. Methods Twenty-eight patients with TOF underwent the staged complete repair. Gore-rex patches were used to enlarge the RVOT of 13 patients, and cryopreserved homograft pericardium patches were used to enlarge the RVOT of 15 patients. The patients were followed up with 2-dimensional echocardiography and chest x-ray. Results One operative death in Gore-rex patch group, the mortality was 7. 7% ; 1 early postoperative death in cryopreserved homograft pericardium patch group, the mortality was 6. 7%. Between 2 groups, hemostasia time in operation room with significant difference （ P 〈 0. 01 ）, pericardial cavity drainage volume with difference （ P 〈 0. 05 ）. Gore-rex patch group was followed up 2 to 4.5 years, homograft pericardium patch group was followed up 0. 8 to 2.1 years. Echocardiography showed that there was significant difference of the residual obstruction at RVOT level （ P 〈 0. 01 ）. No calcification shadow was discovered on the chest x-ray of both groups. Conclusion Homograft pericardium is tissue with high density and intensity, its elasticity and compliance are good. Using homograft pericardium patch maybe helpful to decrease the residual obstruction of RVOT after operation. It can be adapted as a repairing material in cardiac surgery.展开更多
Objective To screen the coaggregating pairs between perio-pathogenic and cariogenic bacteria and to investigate the susceptibility of these coaggregations to inhibitors. Methods 4 strains of perio-pathogenic bacteria,...Objective To screen the coaggregating pairs between perio-pathogenic and cariogenic bacteria and to investigate the susceptibility of these coaggregations to inhibitors. Methods 4 strains of perio-pathogenic bacteria, Fusobacterium nuleatum （Fn） ATCC 10953, Actinobacilllus actinomycetem comitans （Aa） Y4, Porphyromonas gingivalis （Pg） ATCC 33277,Prevotella intermedia （Pi） ATCC 25261 and 4 strains of cariogenic bacteria, Streptococcus mutans （Sm） lngbritt, Streptococcus sanguis （Ss） 34, Actinomyces viscosus （ Av） 19246 and Lactobacillus acidophilus （La） ATCC 4356 were used to determine the coaggregating degrees of various combinations of the above bacteria by a visual assay and a turbidimetric assay. Then more than ＋ 2 （ or 20% ） coaggregation degrees＇ pairs were used to investigate the inhibitory effect of lactose and arginine and to identify the minimum of their coaggregation-inhibitory concentration. Results The coaggregation degrees of Fn-Av, Pg-Av, Fn-Sm, Fn-Ss, Fn-La and Pg-Ss pairs were higher than ＋ 2 （ 20% ）. 3.0 - 6.0mmol/L of arginine were considerably effective to the above pairs except Fn-Av pair and the disaggregation degrees were 49% - 92%. The maximum of their disaggregation degree to Fn-Av pair was just 18%. 120 - 300mmol/L of lactose were significantly effective to Pg-Ss pair, the disaggregation degrees were 57% - 91%. They partially inhibited Pg-Av pair and were almost ineffective to FnG^＋pairs. Conclusion The coaggregations between perio-pathogenic and cariogenic bacteria are highly specific. Most of them are relatively sensitive to arginine.展开更多
Objective: To observe the survival of hand allograft under the state of immunosuppression and the pathological changes of rejection in the recovery process. Methods: The biopsies of the skin, nerve, muscle, tendon and...Objective: To observe the survival of hand allograft under the state of immunosuppression and the pathological changes of rejection in the recovery process. Methods: The biopsies of the skin, nerve, muscle, tendon and bone tissue of hand allografts during different stages from 1 day to 7 months after operation were observed using routine histological technique. Results: No significant changes due to rejection in skin, nerve, muscle and bone tissue were observed. But different degrees of weak rejective changes were found on the wall of blood vessels; in the muscle and nerve the reactions were markedly stronger than those found in skin tissues. Conclusions: The rejection in deep tissues should be monitored in controlling the rejection of hand allograft.展开更多
文摘Objective To compare the difference of effect while using homograt pericardium patch and Gore-rex patch in staged complete repair for Tetralogy of Fallot （TOF） to enlarge the right ventricular outflow tract （RVOT）. Methods Twenty-eight patients with TOF underwent the staged complete repair. Gore-rex patches were used to enlarge the RVOT of 13 patients, and cryopreserved homograft pericardium patches were used to enlarge the RVOT of 15 patients. The patients were followed up with 2-dimensional echocardiography and chest x-ray. Results One operative death in Gore-rex patch group, the mortality was 7. 7% ; 1 early postoperative death in cryopreserved homograft pericardium patch group, the mortality was 6. 7%. Between 2 groups, hemostasia time in operation room with significant difference （ P 〈 0. 01 ）, pericardial cavity drainage volume with difference （ P 〈 0. 05 ）. Gore-rex patch group was followed up 2 to 4.5 years, homograft pericardium patch group was followed up 0. 8 to 2.1 years. Echocardiography showed that there was significant difference of the residual obstruction at RVOT level （ P 〈 0. 01 ）. No calcification shadow was discovered on the chest x-ray of both groups. Conclusion Homograft pericardium is tissue with high density and intensity, its elasticity and compliance are good. Using homograft pericardium patch maybe helpful to decrease the residual obstruction of RVOT after operation. It can be adapted as a repairing material in cardiac surgery.
文摘Objective To screen the coaggregating pairs between perio-pathogenic and cariogenic bacteria and to investigate the susceptibility of these coaggregations to inhibitors. Methods 4 strains of perio-pathogenic bacteria, Fusobacterium nuleatum （Fn） ATCC 10953, Actinobacilllus actinomycetem comitans （Aa） Y4, Porphyromonas gingivalis （Pg） ATCC 33277,Prevotella intermedia （Pi） ATCC 25261 and 4 strains of cariogenic bacteria, Streptococcus mutans （Sm） lngbritt, Streptococcus sanguis （Ss） 34, Actinomyces viscosus （ Av） 19246 and Lactobacillus acidophilus （La） ATCC 4356 were used to determine the coaggregating degrees of various combinations of the above bacteria by a visual assay and a turbidimetric assay. Then more than ＋ 2 （ or 20% ） coaggregation degrees＇ pairs were used to investigate the inhibitory effect of lactose and arginine and to identify the minimum of their coaggregation-inhibitory concentration. Results The coaggregation degrees of Fn-Av, Pg-Av, Fn-Sm, Fn-Ss, Fn-La and Pg-Ss pairs were higher than ＋ 2 （ 20% ）. 3.0 - 6.0mmol/L of arginine were considerably effective to the above pairs except Fn-Av pair and the disaggregation degrees were 49% - 92%. The maximum of their disaggregation degree to Fn-Av pair was just 18%. 120 - 300mmol/L of lactose were significantly effective to Pg-Ss pair, the disaggregation degrees were 57% - 91%. They partially inhibited Pg-Av pair and were almost ineffective to FnG^＋pairs. Conclusion The coaggregations between perio-pathogenic and cariogenic bacteria are highly specific. Most of them are relatively sensitive to arginine.
文摘Objective: To observe the survival of hand allograft under the state of immunosuppression and the pathological changes of rejection in the recovery process. Methods: The biopsies of the skin, nerve, muscle, tendon and bone tissue of hand allografts during different stages from 1 day to 7 months after operation were observed using routine histological technique. Results: No significant changes due to rejection in skin, nerve, muscle and bone tissue were observed. But different degrees of weak rejective changes were found on the wall of blood vessels; in the muscle and nerve the reactions were markedly stronger than those found in skin tissues. Conclusions: The rejection in deep tissues should be monitored in controlling the rejection of hand allograft.
