Objective.To assess the feature of pulmonary blood flow distribution after total cavopulmonary connection(TCPC)of different types,and to provide the selection of the best type.Methods. Thirty-two consecutive survival ...Objective.To assess the feature of pulmonary blood flow distribution after total cavopulmonary connection(TCPC)of different types,and to provide the selection of the best type.Methods. Thirty-two consecutive survival patients after TCPC underwent radionuclide lung perfusion imaging. According to the radionuclide counts in the left and right lungs,analyses of the distribution of blood flow from superior venous cava(SVC) and inferior venous cava(IVC)and the whole pulmonary blood flow in both lungs were made. All patients were divided into 4 groups by the the anastomosis between IVC and pulmonary artery.Results. GroupⅠ:The flow ratio of the IVC to left lung was greater than that to the right lung,P≤0.01;the flow ratio of the SVC to right lung was greater than that to the left lung,P≤0.01;and the whole pulmonary blood flow went dominantly to the left lung,P≤0.05,which is not in line with physiological distribution. GroupⅡ:the flows from the SVC and IVC were mixed in the middle of the junction and ran evenly into the right and left lungs,the whole pulmonary blood flow went to both lungs,P≥0.05. Group Ⅲ:the flow ratio of the SVC to both lungs were the same,P≥0.05,and major part from IVC went to the right lung,P≤0.01;the pulmonary blood flow go dominantly to the right lung,P≤0.05,which is in accord with physiological distribution. Group Ⅳ:the flows from the right SVC went to right lung by 100%,P≤0.01,and that from the left SVC went to left lung by 100% too,P≤0.01;the flows from IVC went dominantly to the left lung,with little part to the right lung ,P≤0.05.Conclusions. Different types of TCPC can result in different pulmonary blood distributions. The best flow distribution between the left and right lungs can be obtained by an offset of the IVC anastomosis toward the RPA with widening anastomosis for the patients without persist left superior venous cava(PLSVC).展开更多
目的评价核素肺通气/灌注(V/Q)显像对不典型亚肺段肺栓塞(PE)的诊断价值。方法患者141例,男58例,女83例,年龄(65.67±11.29)岁,其中下肢静脉病变史者14例,糖尿病、高脂血症史者45例,63例近期内行有创性诊断和治疗,另19例均无上述病...目的评价核素肺通气/灌注(V/Q)显像对不典型亚肺段肺栓塞(PE)的诊断价值。方法患者141例,男58例,女83例,年龄(65.67±11.29)岁,其中下肢静脉病变史者14例,糖尿病、高脂血症史者45例,63例近期内行有创性诊断和治疗,另19例均无上述病史或诊疗史。所有患者行常规^(99)Tc^m-MAA 和^(99)Tc^m 气体显像后进行1～24个月的抗凝治疗,于治疗后再行肺灌注显像。将抗凝治疗前后肺灌注显像进行对比分析,根据肺内放射性分布的变化判断治疗效果,再结合临床资料及其他影像检查综合判断不典型 PE 的诊断。结果 141例患者肺灌注显像均显示某个肺野内不呈肺段或亚肺段分布的片状或小斑片状放射性分布稀疏区。肺通气显像示肺野内放射性分布基本均匀,未见放射性分布稀疏区。治疗后118例肺灌注显像显示双肺内放射性分布不同程度的增多或均匀。按肺野内放射性分布改善情况标准评价:抗凝治疗后恢复正常35例,显效49例,有效34例,总有效率为83.69%(118/141)。另23例肺内放射性分布无明显变化,视为无效。结论 V/Q 显像是诊断不典型亚肺段 PE 的首选方法。展开更多
文摘Objective.To assess the feature of pulmonary blood flow distribution after total cavopulmonary connection(TCPC)of different types,and to provide the selection of the best type.Methods. Thirty-two consecutive survival patients after TCPC underwent radionuclide lung perfusion imaging. According to the radionuclide counts in the left and right lungs,analyses of the distribution of blood flow from superior venous cava(SVC) and inferior venous cava(IVC)and the whole pulmonary blood flow in both lungs were made. All patients were divided into 4 groups by the the anastomosis between IVC and pulmonary artery.Results. GroupⅠ:The flow ratio of the IVC to left lung was greater than that to the right lung,P≤0.01;the flow ratio of the SVC to right lung was greater than that to the left lung,P≤0.01;and the whole pulmonary blood flow went dominantly to the left lung,P≤0.05,which is not in line with physiological distribution. GroupⅡ:the flows from the SVC and IVC were mixed in the middle of the junction and ran evenly into the right and left lungs,the whole pulmonary blood flow went to both lungs,P≥0.05. Group Ⅲ:the flow ratio of the SVC to both lungs were the same,P≥0.05,and major part from IVC went to the right lung,P≤0.01;the pulmonary blood flow go dominantly to the right lung,P≤0.05,which is in accord with physiological distribution. Group Ⅳ:the flows from the right SVC went to right lung by 100%,P≤0.01,and that from the left SVC went to left lung by 100% too,P≤0.01;the flows from IVC went dominantly to the left lung,with little part to the right lung ,P≤0.05.Conclusions. Different types of TCPC can result in different pulmonary blood distributions. The best flow distribution between the left and right lungs can be obtained by an offset of the IVC anastomosis toward the RPA with widening anastomosis for the patients without persist left superior venous cava(PLSVC).
文摘目的评价核素肺通气/灌注(V/Q)显像对不典型亚肺段肺栓塞(PE)的诊断价值。方法患者141例,男58例,女83例,年龄(65.67±11.29)岁,其中下肢静脉病变史者14例,糖尿病、高脂血症史者45例,63例近期内行有创性诊断和治疗,另19例均无上述病史或诊疗史。所有患者行常规^(99)Tc^m-MAA 和^(99)Tc^m 气体显像后进行1～24个月的抗凝治疗,于治疗后再行肺灌注显像。将抗凝治疗前后肺灌注显像进行对比分析,根据肺内放射性分布的变化判断治疗效果,再结合临床资料及其他影像检查综合判断不典型 PE 的诊断。结果 141例患者肺灌注显像均显示某个肺野内不呈肺段或亚肺段分布的片状或小斑片状放射性分布稀疏区。肺通气显像示肺野内放射性分布基本均匀,未见放射性分布稀疏区。治疗后118例肺灌注显像显示双肺内放射性分布不同程度的增多或均匀。按肺野内放射性分布改善情况标准评价:抗凝治疗后恢复正常35例,显效49例,有效34例,总有效率为83.69%(118/141)。另23例肺内放射性分布无明显变化,视为无效。结论 V/Q 显像是诊断不典型亚肺段 PE 的首选方法。
