目的探讨0.1 mm厚聚四氟乙烯(Gore-Tex)片制作肺动脉单瓣跨环补片重建右心室流出道的近中期临床疗效。方法76例合并肺动脉狭窄或畸形的先天性心脏病患儿,其中法洛四联症(tetralogy of Fallot,TOF)合并肺动脉狭窄55例,TOF合并Ⅰ型肺动脉...目的探讨0.1 mm厚聚四氟乙烯(Gore-Tex)片制作肺动脉单瓣跨环补片重建右心室流出道的近中期临床疗效。方法76例合并肺动脉狭窄或畸形的先天性心脏病患儿,其中法洛四联症(tetralogy of Fallot,TOF)合并肺动脉狭窄55例,TOF合并Ⅰ型肺动脉闭锁7例,TOF合并肺动脉瓣缺如5例,右心室双出口合并肺动脉狭窄3例,TOF行改良Blalock-Taussig分流术后6例(左侧改良Blalock-Taussig分流术5例,右侧1例),均行矫治术,术中使用Gore-Tex片制作肺动脉单瓣跨环补片重建右心室流出道。比较术前与术中停体外循环后血氧饱和度、肺动脉干直径等差异,随访观察手术效果。结果76例均顺利完成手术,体外循环时间118(109,134)min,主动脉阻断时间86(77,102)min,术后呼吸机辅助时间88(45,99)h,ICU停留时间135(114,161)h;术后因心包压塞急诊二次手术1例,发生一过性低心排血量综合征2例、心律失常2例、肺部感染1例,均经对症治疗后恢复;1例室间隔微小残余分流(流速<2.5 m/s),术后6个月自行闭合。术中停体外循环后血氧饱和度[96.00(94.00,97.00)%]较术前[84.00(78.00,89.00)%]增高,肺动脉干直径[12.00(10.12,13.00)mm]较术前[6.60(5.80,7.50)mm]增加,肺动脉瓣压差[21.00(16.00,27.00)mm Hg]、肺动脉瓣上流速[2.31(2.00,2.70)m/s]较术前[86.00(72.00,94.75)mm Hg、4.60(4.20,5.10)m/s]降低(P<0.05)。术后随访3~48个月,超声心动图示73例肺动脉瓣瓣叶活动良好,开启闭合正常;3例轻度肺动脉瓣狭窄,随访期间未见进一步加重;5例肺动脉瓣轻度关闭不全;均无肺动脉单瓣的撕裂、黏连、增厚、钙化、血栓形成及感染等。结论右心室流出道重建中术应用Gore-Tex片制作肺动脉单瓣有较好的近中期抗反流作用,可改善右心功能。展开更多
Introduction: Simple suture isn’t always possible in large congenital diaphragmatic hernia (cdh) defects. Synthetic materials are used for correction such as Silastic®, Gore-Tex® (GT), Teflon® or...Introduction: Simple suture isn’t always possible in large congenital diaphragmatic hernia (cdh) defects. Synthetic materials are used for correction such as Silastic®, Gore-Tex® (GT), Teflon® or biological, such as autologous muscle patches. It was shown that bovine pericardium (bp) was effective to correct those large defects with many positive outcomes when compared with syntactic materials. Aim: This study aims to establish an experimental model of correction for large diaphragmatic defect with PB and GT patches to compare histologically the tissue interaction between them and diaphragm in young Wistar rats. Materials & Methods: 15 wistar rats were divided in 3 groups: Rats that used BP was named G1;Rats that used GT was named G2;and rats with only scraping in the diphragm, named G3 (control). Animals were submited to a laparotomy and fixed pathces to diaphragms and harvested 3 weeks later. Area between normal diaphragm and patches were isolated and separated for histological analysis, such as lymphocytic infiltration (inflammation), neovascularization and fibrosis. Results: G1 presented inflammation between BP and Diaphragm In 5 Samples. G2 Presented Neovascularization In 5 Samples, But No inflammation. Fibrotic tissue overlapping GT patches occurred in 3 samples in G2. Comparing G1 with G2 there was a significant statistical difference concerning inflammation (P = 0.0079), in G1. Comparing neovascularization there is no significant statistical difference (P = 0.4444), despite a slight higher incidence in G2. Fibrosis in both groups presented no significant statistical difference (P = 0.4444), despite a slight higher incidence in G2. There were no alterations in G3. Discussion: Despite the statistical difference in the inflammatory process was more frequent in G1 (P = 0.0079), neovascularization and fibrosis were more frequent in G2. Conclusion: The proposed experimental model was satisfactory to reproduce suture of patches in the diaphragm. These results suggests that inflammation, neovascularization and fibrosis indeed contribute to a benign healing process that reacts differently in each group but can drive to a more lasting and permanent results when biological patch is considered. Statistical report suggests that this study should be continued with a larger sample of animals and a wider period of time before harvest.展开更多
文摘Introduction: Simple suture isn’t always possible in large congenital diaphragmatic hernia (cdh) defects. Synthetic materials are used for correction such as Silastic®, Gore-Tex® (GT), Teflon® or biological, such as autologous muscle patches. It was shown that bovine pericardium (bp) was effective to correct those large defects with many positive outcomes when compared with syntactic materials. Aim: This study aims to establish an experimental model of correction for large diaphragmatic defect with PB and GT patches to compare histologically the tissue interaction between them and diaphragm in young Wistar rats. Materials & Methods: 15 wistar rats were divided in 3 groups: Rats that used BP was named G1;Rats that used GT was named G2;and rats with only scraping in the diphragm, named G3 (control). Animals were submited to a laparotomy and fixed pathces to diaphragms and harvested 3 weeks later. Area between normal diaphragm and patches were isolated and separated for histological analysis, such as lymphocytic infiltration (inflammation), neovascularization and fibrosis. Results: G1 presented inflammation between BP and Diaphragm In 5 Samples. G2 Presented Neovascularization In 5 Samples, But No inflammation. Fibrotic tissue overlapping GT patches occurred in 3 samples in G2. Comparing G1 with G2 there was a significant statistical difference concerning inflammation (P = 0.0079), in G1. Comparing neovascularization there is no significant statistical difference (P = 0.4444), despite a slight higher incidence in G2. Fibrosis in both groups presented no significant statistical difference (P = 0.4444), despite a slight higher incidence in G2. There were no alterations in G3. Discussion: Despite the statistical difference in the inflammatory process was more frequent in G1 (P = 0.0079), neovascularization and fibrosis were more frequent in G2. Conclusion: The proposed experimental model was satisfactory to reproduce suture of patches in the diaphragm. These results suggests that inflammation, neovascularization and fibrosis indeed contribute to a benign healing process that reacts differently in each group but can drive to a more lasting and permanent results when biological patch is considered. Statistical report suggests that this study should be continued with a larger sample of animals and a wider period of time before harvest.
