The value of color Doppler flow imaging(CDFI) and intravenous contrast-enhanced ultrasound(CEUS) for assessing the transplanted liver and early diagnosing complications by examining hemodynamic changes was discussed.S...The value of color Doppler flow imaging(CDFI) and intravenous contrast-enhanced ultrasound(CEUS) for assessing the transplanted liver and early diagnosing complications by examining hemodynamic changes was discussed.Seventy-five patients with orthotopic liver transplantation(OLT) underwent CDFI.The following parameters were measured:peak systolic velocity(PS),resistance index(RI) and Doppler perfusion index(DPI) of the hepatic artery(HA),time average velocity(TAV) of portal vein(PV) and velocity of hepatic vein(HV) in different stages postoperation.And 11 patients of them received CEUS.Thirty healthy subjects were enrolled as controls.The results showed that:(1) In 23 patients without obvious complications,TAV of PV within 15 days post-operation was significantly higher than in controls(P<0.05),PS and DPI of HA within 7 days postoperation were lower,but RI was higher than in controls(P<0.05);(2) When the hepatic artery thrombosis(HAT) occurred,PS and DPI of HA were obviously decreased,but TAV of PV signifi-cantly increased like a high saw-tooth wave;(3) While rejection occurred,both TAV of PV and PS of HA were decreased with the increase in RI of HA,and the triphasic wave of HV disappeared and displayed as saw-tooth wave;(4) The incidence of biliary complications in liver transplantation was increased when DPI was reduced;(5) Seven cases of hepatic carcinoma relapse after OLT demonstrated hyperecho in the arterial phase and hypoecho in the portal and later phase on CEUS;(6) In 2 cases of HA thrombus,there was no visualized enhancement in arterial phase of CEUS,but enhancement during the portal vein and parenchymal phase.It was concluded that the hemodynamic changes of PV,HA and HV in the transplanted liver are valuable for assessing the transplanted liver and early diagnosing complications on CDFI and CEUS.展开更多
Objective To observe the changes of thrombelastography (TEG) and color Doppler flow imaging (CDFI) in the perioperative period after closed lower limb fracture.Methods Fasting venous blood samples in the morning from ...Objective To observe the changes of thrombelastography (TEG) and color Doppler flow imaging (CDFI) in the perioperative period after closed lower limb fracture.Methods Fasting venous blood samples in the morning from 11 healthy adults were used展开更多
To report the methods and effect of axial pattern flap on lower limb in repairing deep wounds of heels by using color Doppler flow imaging (CDFI) technique so as to solve the ever before problems that the vessel can n...To report the methods and effect of axial pattern flap on lower limb in repairing deep wounds of heels by using color Doppler flow imaging (CDFI) technique so as to solve the ever before problems that the vessel can not be displayed in designing axial flap.Methods Suitable axial flaps on lower limbs were selected according to the character of the wounds.There were 25 flaps including 10 cases of the distal-based sural neurovascular flap,nine medial sole flap and six medial leg flap.All the axial pattern flaps were designed on the basis of traditional design ways before operation;then,CDFI appliance with high resolution was used to examine the starting spot,exterior diameter,trail and length of the flap’s major artery.The flaps were redesigned according to the results of CDFI and transferred to cover the wounds.In the meantime,both the results of operation and examination were compared.Results The major artery’s starting spot,exterior diameter,trail and anatomic layers were displayed clearly,in consistency with the results of operation.The flaps survived completely and recovered well,with perfect appearance,color and arthral function.Conclusion CDFI is a simple,macroscopic and atraumatic method for designing the axial pattern flap on lower limb,can provide more scientific and accurate evidence for preoperative determination of flap transplantation and is worthy of clinical application.10 refs,4 figs,2 tabs.展开更多
Whether the localized flow acceleration occurs in the resting stenotic left anterior descending coronary artery was explored and its value for detection of coronary stenosis estimated. Blood flow in the left anterior ...Whether the localized flow acceleration occurs in the resting stenotic left anterior descending coronary artery was explored and its value for detection of coronary stenosis estimated. Blood flow in the left anterior descending coronary arteries in 45 patients was detected by transthoracic color Doppler echocardiograph and multipoint pulse Doppler spectrums were recorded in the same segment. The ratio of the maximal peak diastolic velocity to the minimal peak diastolic velocity was calculated. The ratio ≥1.5 was the cutoff value for the presence of localized acceleration flow. There were 23 patients with localized acceleration flow examined by echocardiography. Twenty of them were found to have luminal diameter stenosis (60 %-98 %) in the left anterior descending coronary arteries by coronary angiography and 3 patients were normal. There were 22 patients without localized acceleration flow examined by echocardiography. Eighteen of them had no or <60 % stenosis. Four patients had serious stenosis (≥95 %) or occluded segments in the left anterior descending coronary arteries on coronary angiography. The ratio of the maximal peak diastolic velocity to the minimal peak diastolic velocity was significantly higher in patients with left anterior descending coronary artery stenosis than that in those without stenosis (1.9±0.3 vs 1.3±0.2, P<0.01) and it correlated significantly with left anterior descending coronary artery stenosis (r= 0.77, P<0.01). The specificity by using the ratio≥1.5 for stenosis detection was 85.7 % (18/21), and the sensitivity was 83.3 % (20/24). This study demonstrated that local blood flow velocity was increased in the resting stenotic left anterior descending coronary artery. Transthoracic color Doppler echocardiography is a reliable noninvasive method to detect localized acceleration flow in the left anterior descending coronary artery stenosis and it is useful in the noninvasive diagnosis of stenosis in the left anterior descending coronary artery.展开更多
Seventy four cases of infertility were examined to study the hemodynamics of the bilateral ovarian arteries at 21st day during the corpus luteum phase by color Doppler energy(CDE) and color Doppler flow imaging (CDFI)...Seventy four cases of infertility were examined to study the hemodynamics of the bilateral ovarian arteries at 21st day during the corpus luteum phase by color Doppler energy(CDE) and color Doppler flow imaging (CDFI). All the patients were verified by laparoscopy, fallopian tube patency examination and ovarian function test. Twenty two healthy women served as controls. The results showed that the difference of resistance index(RI)and pulsatility index (PI) of bilateral ovarian arteries between the infertility and the normal controls had statistical significance ( P <0.01), and the PI showed negative correlation with the thickness of endometrium (left side: r =0.724, P <0.01; right side: r =0.756, P <0.01). The results also showed that CDE was more sensitive than CDFI in displaying the ovarian arteries. It could be concluded that the elevated resistance of ovarian artery during the corpus luteum phase was one of the important factors that resulted in infertility.展开更多
文摘The value of color Doppler flow imaging(CDFI) and intravenous contrast-enhanced ultrasound(CEUS) for assessing the transplanted liver and early diagnosing complications by examining hemodynamic changes was discussed.Seventy-five patients with orthotopic liver transplantation(OLT) underwent CDFI.The following parameters were measured:peak systolic velocity(PS),resistance index(RI) and Doppler perfusion index(DPI) of the hepatic artery(HA),time average velocity(TAV) of portal vein(PV) and velocity of hepatic vein(HV) in different stages postoperation.And 11 patients of them received CEUS.Thirty healthy subjects were enrolled as controls.The results showed that:(1) In 23 patients without obvious complications,TAV of PV within 15 days post-operation was significantly higher than in controls(P<0.05),PS and DPI of HA within 7 days postoperation were lower,but RI was higher than in controls(P<0.05);(2) When the hepatic artery thrombosis(HAT) occurred,PS and DPI of HA were obviously decreased,but TAV of PV signifi-cantly increased like a high saw-tooth wave;(3) While rejection occurred,both TAV of PV and PS of HA were decreased with the increase in RI of HA,and the triphasic wave of HV disappeared and displayed as saw-tooth wave;(4) The incidence of biliary complications in liver transplantation was increased when DPI was reduced;(5) Seven cases of hepatic carcinoma relapse after OLT demonstrated hyperecho in the arterial phase and hypoecho in the portal and later phase on CEUS;(6) In 2 cases of HA thrombus,there was no visualized enhancement in arterial phase of CEUS,but enhancement during the portal vein and parenchymal phase.It was concluded that the hemodynamic changes of PV,HA and HV in the transplanted liver are valuable for assessing the transplanted liver and early diagnosing complications on CDFI and CEUS.
文摘Objective To observe the changes of thrombelastography (TEG) and color Doppler flow imaging (CDFI) in the perioperative period after closed lower limb fracture.Methods Fasting venous blood samples in the morning from 11 healthy adults were used
文摘To report the methods and effect of axial pattern flap on lower limb in repairing deep wounds of heels by using color Doppler flow imaging (CDFI) technique so as to solve the ever before problems that the vessel can not be displayed in designing axial flap.Methods Suitable axial flaps on lower limbs were selected according to the character of the wounds.There were 25 flaps including 10 cases of the distal-based sural neurovascular flap,nine medial sole flap and six medial leg flap.All the axial pattern flaps were designed on the basis of traditional design ways before operation;then,CDFI appliance with high resolution was used to examine the starting spot,exterior diameter,trail and length of the flap’s major artery.The flaps were redesigned according to the results of CDFI and transferred to cover the wounds.In the meantime,both the results of operation and examination were compared.Results The major artery’s starting spot,exterior diameter,trail and anatomic layers were displayed clearly,in consistency with the results of operation.The flaps survived completely and recovered well,with perfect appearance,color and arthral function.Conclusion CDFI is a simple,macroscopic and atraumatic method for designing the axial pattern flap on lower limb,can provide more scientific and accurate evidence for preoperative determination of flap transplantation and is worthy of clinical application.10 refs,4 figs,2 tabs.
文摘Whether the localized flow acceleration occurs in the resting stenotic left anterior descending coronary artery was explored and its value for detection of coronary stenosis estimated. Blood flow in the left anterior descending coronary arteries in 45 patients was detected by transthoracic color Doppler echocardiograph and multipoint pulse Doppler spectrums were recorded in the same segment. The ratio of the maximal peak diastolic velocity to the minimal peak diastolic velocity was calculated. The ratio ≥1.5 was the cutoff value for the presence of localized acceleration flow. There were 23 patients with localized acceleration flow examined by echocardiography. Twenty of them were found to have luminal diameter stenosis (60 %-98 %) in the left anterior descending coronary arteries by coronary angiography and 3 patients were normal. There were 22 patients without localized acceleration flow examined by echocardiography. Eighteen of them had no or <60 % stenosis. Four patients had serious stenosis (≥95 %) or occluded segments in the left anterior descending coronary arteries on coronary angiography. The ratio of the maximal peak diastolic velocity to the minimal peak diastolic velocity was significantly higher in patients with left anterior descending coronary artery stenosis than that in those without stenosis (1.9±0.3 vs 1.3±0.2, P<0.01) and it correlated significantly with left anterior descending coronary artery stenosis (r= 0.77, P<0.01). The specificity by using the ratio≥1.5 for stenosis detection was 85.7 % (18/21), and the sensitivity was 83.3 % (20/24). This study demonstrated that local blood flow velocity was increased in the resting stenotic left anterior descending coronary artery. Transthoracic color Doppler echocardiography is a reliable noninvasive method to detect localized acceleration flow in the left anterior descending coronary artery stenosis and it is useful in the noninvasive diagnosis of stenosis in the left anterior descending coronary artery.
文摘Seventy four cases of infertility were examined to study the hemodynamics of the bilateral ovarian arteries at 21st day during the corpus luteum phase by color Doppler energy(CDE) and color Doppler flow imaging (CDFI). All the patients were verified by laparoscopy, fallopian tube patency examination and ovarian function test. Twenty two healthy women served as controls. The results showed that the difference of resistance index(RI)and pulsatility index (PI) of bilateral ovarian arteries between the infertility and the normal controls had statistical significance ( P <0.01), and the PI showed negative correlation with the thickness of endometrium (left side: r =0.724, P <0.01; right side: r =0.756, P <0.01). The results also showed that CDE was more sensitive than CDFI in displaying the ovarian arteries. It could be concluded that the elevated resistance of ovarian artery during the corpus luteum phase was one of the important factors that resulted in infertility.
