The use of bilateral internal thoracic arteries to treat coronary artery disease is very less despite of improved long-term survival. In this case report</span><span style="font-family:"">,&...The use of bilateral internal thoracic arteries to treat coronary artery disease is very less despite of improved long-term survival. In this case report</span><span style="font-family:"">,</span><span style="font-family:""> a patient presented with TVD has been managed with anaortic off-pump complete arterial revascularization (OPCABG) by using composite LIMA RIMA Y Sequential 5 grafts to achieve complete arterial revascularization successfully. This type of operative procedure is technically difficult in a resource poor country like Bangladesh. However, this has been done by a group of young cardiac surgeon. During follow up</span><span style="font-family:"">,</span><span style="font-family:""> the patient is in a good condition.展开更多
Grafting copolymerization of styrene and acrylic acid onto polypropylene fabric had been studied by using a pre-irradiation technique. The polypropylene fabric Samples were irradiated by Y-ray and electron beam under ...Grafting copolymerization of styrene and acrylic acid onto polypropylene fabric had been studied by using a pre-irradiation technique. The polypropylene fabric Samples were irradiated by Y-ray and electron beam under the conditions of air and nitrogen gas, respectively. The effect of absorbed dose, monomer concentration in solvent, reaction temperature and reaction time on the degree of grafting were determined. The effects of metallic salts and sulphuric acid on the grafting yield of acrylic acid were also examined. The samples irradiated by electron beam give a much higher degree of grafting than those by Y -ray when styrene was grafted to polypropylene fabric. However, the grafting yield of acrylic acid on polypropylene fabric in the presence of metallic salts and sultric acid showed the opposite results from the case of styrene. This effect is reasonably interpreted by assuming that the grafting is dominated by trapped radicals and peroxides in pre-irradiated polypropylene.展开更多
The feasibility and safety of total arterial coronary revascularization with 2 arterial conduits in patients with impaired left ventricular function was evaluated. Data were prospectively collected on all patients wit...The feasibility and safety of total arterial coronary revascularization with 2 arterial conduits in patients with impaired left ventricular function was evaluated. Data were prospectively collected on all patients with multiple vessel disease and moderately or severely impaired left ventricular function, who underwent coronary surgery with the intention of total arterial revascularization with 2 conduits between March 1995 and August 2002. One hundred and seventy-nine patients were included in the study. Acute coronary insufficiency was present in 3 patients and 43 had unstable angina. Severe left ventricular impairment was present in 29 patients. There were 17 redo operations including 3 redo-redo procedures. Eighty-two percent of patients had a Y graft configuration from the left internal mammary artery （right internal mammary artery 40. 8 %, radial artery 33. 5 %, other 7.8 % ）. The perioperative mortality was 2. 2 %, myocardial infarction 1.7 % and stroke 0. 6 %. Total arterial revascularization in patients with ischaemic left ventricular dysfunction can be safely performed with 2 arterial conduits. The radial artery provides conduit length greater than the right internal mammary artery and allows full revascularization despite left ventricular dilatation.展开更多
采用γ-射线辐照法,以壳聚糖、丙烯酰胺(AM)和二甲基二烯丙基氯化铵(DMDAAC)为原料制备了壳聚糖-AM-DMDAAC接枝共聚物。考察了吸收剂量、单体AM与DMDAAC重量比、壳聚糖与总单体重量比、反应物浓度等因素对接枝共聚反应的影响。结果表明...采用γ-射线辐照法,以壳聚糖、丙烯酰胺(AM)和二甲基二烯丙基氯化铵(DMDAAC)为原料制备了壳聚糖-AM-DMDAAC接枝共聚物。考察了吸收剂量、单体AM与DMDAAC重量比、壳聚糖与总单体重量比、反应物浓度等因素对接枝共聚反应的影响。结果表明,随着吸收剂量的增大,接枝率和阳离子度上升,而接枝效率变化不大,吸收剂量为4 k Gy时最佳,接枝率、接枝效率和阳离子度分别为210.9%、96.1%和26.9%;接枝率和接枝效率随着AM与DMDAAC重量比的增加而提高,当AM与DMDAAC重量比为7:3时达到最大值,分别为182.6%和98.8%;随着壳聚糖与总单体重量比的降低,接枝率、接枝效率和阳离子度逐渐增加,当壳聚糖与总单体重量比为3:8时,其值分别为182.5%、94.9%和25.5%,接枝效果最好;接枝率、接枝效率和阳离子度随着反应物浓度的降低先上升后降低,醋酸最佳用量为100 m L。展开更多
文摘The use of bilateral internal thoracic arteries to treat coronary artery disease is very less despite of improved long-term survival. In this case report</span><span style="font-family:"">,</span><span style="font-family:""> a patient presented with TVD has been managed with anaortic off-pump complete arterial revascularization (OPCABG) by using composite LIMA RIMA Y Sequential 5 grafts to achieve complete arterial revascularization successfully. This type of operative procedure is technically difficult in a resource poor country like Bangladesh. However, this has been done by a group of young cardiac surgeon. During follow up</span><span style="font-family:"">,</span><span style="font-family:""> the patient is in a good condition.
基金the National Natural Science Foundation of China (29404031 ) and the Korea Science and Technology Foundation
文摘Grafting copolymerization of styrene and acrylic acid onto polypropylene fabric had been studied by using a pre-irradiation technique. The polypropylene fabric Samples were irradiated by Y-ray and electron beam under the conditions of air and nitrogen gas, respectively. The effect of absorbed dose, monomer concentration in solvent, reaction temperature and reaction time on the degree of grafting were determined. The effects of metallic salts and sulphuric acid on the grafting yield of acrylic acid were also examined. The samples irradiated by electron beam give a much higher degree of grafting than those by Y -ray when styrene was grafted to polypropylene fabric. However, the grafting yield of acrylic acid on polypropylene fabric in the presence of metallic salts and sultric acid showed the opposite results from the case of styrene. This effect is reasonably interpreted by assuming that the grafting is dominated by trapped radicals and peroxides in pre-irradiated polypropylene.
文摘The feasibility and safety of total arterial coronary revascularization with 2 arterial conduits in patients with impaired left ventricular function was evaluated. Data were prospectively collected on all patients with multiple vessel disease and moderately or severely impaired left ventricular function, who underwent coronary surgery with the intention of total arterial revascularization with 2 conduits between March 1995 and August 2002. One hundred and seventy-nine patients were included in the study. Acute coronary insufficiency was present in 3 patients and 43 had unstable angina. Severe left ventricular impairment was present in 29 patients. There were 17 redo operations including 3 redo-redo procedures. Eighty-two percent of patients had a Y graft configuration from the left internal mammary artery （right internal mammary artery 40. 8 %, radial artery 33. 5 %, other 7.8 % ）. The perioperative mortality was 2. 2 %, myocardial infarction 1.7 % and stroke 0. 6 %. Total arterial revascularization in patients with ischaemic left ventricular dysfunction can be safely performed with 2 arterial conduits. The radial artery provides conduit length greater than the right internal mammary artery and allows full revascularization despite left ventricular dilatation.
文摘采用γ-射线辐照法,以壳聚糖、丙烯酰胺(AM)和二甲基二烯丙基氯化铵(DMDAAC)为原料制备了壳聚糖-AM-DMDAAC接枝共聚物。考察了吸收剂量、单体AM与DMDAAC重量比、壳聚糖与总单体重量比、反应物浓度等因素对接枝共聚反应的影响。结果表明,随着吸收剂量的增大,接枝率和阳离子度上升,而接枝效率变化不大,吸收剂量为4 k Gy时最佳,接枝率、接枝效率和阳离子度分别为210.9%、96.1%和26.9%;接枝率和接枝效率随着AM与DMDAAC重量比的增加而提高,当AM与DMDAAC重量比为7:3时达到最大值,分别为182.6%和98.8%;随着壳聚糖与总单体重量比的降低,接枝率、接枝效率和阳离子度逐渐增加,当壳聚糖与总单体重量比为3:8时,其值分别为182.5%、94.9%和25.5%,接枝效果最好;接枝率、接枝效率和阳离子度随着反应物浓度的降低先上升后降低,醋酸最佳用量为100 m L。
