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Left atrial appendage occluder detachment treated with transthoracic ultrasound combined with digital subtraction angiography guided catcher:A case report
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作者 Kai Yu Yun-Hua Mei 《World Journal of Clinical Cases》 SCIE 2024年第6期1157-1162,共6页
BACKGROUND There are very few cases of cardiac occluder detachment,and it is rare to completely remove the occluder using interventional methods without undergoing thoracotomy surgery after detachment.This case innova... BACKGROUND There are very few cases of cardiac occluder detachment,and it is rare to completely remove the occluder using interventional methods without undergoing thoracotomy surgery after detachment.This case innovatively used ultrasound guidance combined with digital subtraction angiography(DSA)to completely remove the occluder,accumulating some experience.CASE SUMMARY The patient underwent left atrial appendage occlusion surgery in our hospital due to atrial fibrillation.After the surgery,the occluder fell off and became free in the left ventricle,which is very dangerous.We innovatively used ultrasound guidance,combined with DSA,and interventional surgery to successfully capture the free occluder using a catcher,completely remove it,and then re implant a new left atrial appendage occluder.After the surgery,the patient recovered very well.CONCLUSION The size selection of the occluder is slightly conservative,and the shape of the left atrial appendage opening is irregular. 展开更多
关键词 Left atrial appendage occluder DETACHMENT Ultrasound combined with digital subtraction angiography Interventional operation Successfully captured Case report
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Enhancing transjugular intrahepatic portosystemic shunt procedure efficiency with digital subtraction angiography image overlay technology in esophagogastric variceal bleeding
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作者 Xiao-Yan Li Yao Li +3 位作者 Wen-Qiang Li Shuai Ju Zhi-Hui Dong Jian-Jun Luo 《World Journal of Gastrointestinal Surgery》 SCIE 2024年第9期2870-2877,共8页
BACKGROUND Transjugular intrahepatic portosystemic shunt(TIPS)is a pivotal intervention for managing esophagogastric variceal bleeding in patients with chronic hepatic schistosomiasis.AIM To evaluate the efficacy of d... BACKGROUND Transjugular intrahepatic portosystemic shunt(TIPS)is a pivotal intervention for managing esophagogastric variceal bleeding in patients with chronic hepatic schistosomiasis.AIM To evaluate the efficacy of digital subtraction angiography image overlay tech-nology(DIT)in guiding the TIPS procedure.METHODS We conducted a retrospective analysis of patients who underwent TIPS at our hospital,comparing outcomes between an ultrasound-guided group and a DIT-guided group.Our analysis focused on the duration of the portosystemic shunt puncture,the number of punctures needed,the total surgical time,and various clinical indicators related to the surgery.RESULTS The study included 52 patients with esophagogastric varices due to chronic hepatic schistosomiasis.Results demonstrated that the DIT-guided group expe-rienced significantly shorter puncture times(P<0.001)and surgical durations(P=0.022)compared to the ultrasound-guided group.Additionally,postoperative assessments showed significant reductions in aspartate aminotransferase,B-type natriuretic peptide,and portal vein pressure in both groups.Notably,the DIT-guided group also showed significant reductions in total bilirubin(P=0.001)and alanine aminotransferase(P=0.023).CONCLUSION The use of DIT for guiding TIPS procedures highlights its potential to enhance procedural efficiency and reduce surgical times in the treatment of esophagogastric variceal bleeding in patients with chronic hepatic schistoso-miasis. 展开更多
关键词 Portal hypertension digital subtraction angiography Image overlay technology Hepatic artery labeling Transjugular intrahepatic portosystemic shunt
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Detection of hypervascular hepatocellular carcinoma: Comparison of multi-detector CT with digital subtraction angiography and Lipiodol CT 被引量:16
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作者 Xiao-HuaZheng Yong-SongGuan Xiang-PingZhou JuanHuang LongSun XiaoLi YuanLiu 《World Journal of Gastroenterology》 SCIE CAS CSCD 2005年第2期200-203,共4页
AIM: The purpose of this study was to compare the diagnostic accuracy of biphasic multi-detector row helical computed tomography (MDCT), digital subtraction angiography (DSA)and Lipiodol computed tomography (CT) in de... AIM: The purpose of this study was to compare the diagnostic accuracy of biphasic multi-detector row helical computed tomography (MDCT), digital subtraction angiography (DSA)and Lipiodol computed tomography (CT) in detection of hypervascular hepatocellular carcinoma (HCC).METHODS: Twenty-eight patients with nodular HCC underwent biphasic MDCT examination: hepatic arterial phase (HAP) 25 s and portal venous phase (PVP) 70 s after injection of the contrast medium (1.5 mL/kg). They also underwent hepatic angiography and intra-arterial infusion of iodized oil. Lipiodol CT was performed 3-4 wk after infusion. MDCT images were compared with DSA and Lipiodol CT images for detection of hepatic nodules.RESULTS: The three imaging techniques had the same sensitivity in detecting nodules >20 mm in diameter. There was no significant difference in the sensitivity among HAP-MDCT, Lipiodol CT and DSA for nodules of 10-20 mm in diameter. For the nodules <10 mm in diameter, HAP-MDCT identified 47, Lipiodol CT detected 27 (X2= 11.3, P= 0.005<0.01, HAP-MDCT vs Lipiodol CT) and DSA detected 16(X2= 9.09, P= 0.005<0.01 vs Lipiodol CT and X2= 29.03,P = 0.005<0.01 vs HAP-MDCT). However, six nodules <10 mm in diameter were detected only by Lipiodol CT.CONCLUSION: MDCT and Lipiodol CT are two complementary modalities. At present, MDCT does not obviate the need for DSA and subsequent Lipiodol CT as a preoperative examination for HCC. 展开更多
关键词 Hypervascular hepatocellular carcinoma Multi-detector CT digital subtraction angiography Lipiodol CT
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Interventional digital subtraction angiography for small bowel gastrointestinal stromal tumors with bleeding 被引量:6
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作者 Yao-Ting Chen Hong-Liang Sun +5 位作者 Jiang-Hong Luo Jia-Yan Ni Dong Chen Xiong-Ying Jiang Jing-Xing Zhou Lin-Feng Xu 《World Journal of Gastroenterology》 SCIE CAS 2014年第47期17955-17961,共7页
AIM: To retrospectively evaluate the diagnostic efficacy of interventional digital subtraction angiography (DSA) for bleeding small bowel gastrointestinal stromal tumors (GISTs).
关键词 Gastrointestinal stromal tumors Small bowel digital subtraction angiography INTERVENTIONAL EMBOLIZATION BLEEDING
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Carbon dioxide digital subtraction angiography manifestations of hepa-tocellular carcinoma 被引量:2
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作者 卢伟 李彦豪 +3 位作者 何晓峰 陈勇 曾庆乐 许小立 《Journal of Medical Colleges of PLA(China)》 CAS 2002年第1期60-64,共5页
Objective: To investigate the imaging features and clinical significance of carbon dioxide digital subtraction angiography (CO2-DSA) in the diagnosis and treatment of hepatocellular carcinoma (HCC). Methods: Both CO2-... Objective: To investigate the imaging features and clinical significance of carbon dioxide digital subtraction angiography (CO2-DSA) in the diagnosis and treatment of hepatocellular carcinoma (HCC). Methods: Both CO2-DSA and conventional DSA were performed in all 47 patients with HCC, and the angio-graphic manifestations of CO2-DSA were compared with those of conventional DSA in the same patients. Results: Peripheral arterial and capillary imaging by CO2-DSA was inferior to that by conventional DSA, although blood pools were well visualized with CO2. Improved visualization of arterioportal shunting (APS) was obtained with CO2-DSA compared with that by conventional angiography. APS was observed in 33 cases by CO2-DSA and in 12 cases by conventional angiography (P<0. 001). Retrograde visualization of the portal vein (PV) trunk and its large branches was demonstrated in 16 cases by CO2-DSA and in 1 case by conventional DSA (P<0. 001). The manifestation of lipiodol retention in the tumors was consistent with CO2-DSA images after TAE in 38 cases, and with those of conventional DSA in 23 cases (P<0. 01). Conclusion: CO2-DSA was superior to conventional DSA in the detection of APS and retrograde visualization of PV system, and the former can provide usefulness information for the treatment planning (chemoembolization) and patient prognosis. Demonstration of APS by CO2-DSA may suggest the presence of intrahepatic metastases. 展开更多
关键词 carbon dioxide digital subtraction angiography hepatocellular carcinoma arterioportal shunting
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Modified magnetic resonance angiography of the liver using sensitivity encoding in comparison with digital subtraction angiography and CT arterial portography 被引量:1
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作者 Masahiko Fujii Hideaki Kawamitsu Kazuro Sugimura 《Hepatobiliary & Pancreatic Diseases International》 SCIE CAS 2005年第2期185-191,共7页
BACKGROUND: Over 355 patients have received ortho- topic liver transplantation ( OLT) at this hospital since 1993. Preoperative imaging studies of both hepatic vessels and parenchyma in these recipients bettered surgi... BACKGROUND: Over 355 patients have received ortho- topic liver transplantation ( OLT) at this hospital since 1993. Preoperative imaging studies of both hepatic vessels and parenchyma in these recipients bettered surgical plan- ning or even precluded the necessity of surgery. Here we report our preliminary results of modified magnetic reso- nance angiography ( MRA ) using sensitivity encoding ( SENSE) through comparative study with conventional digital subtraction angiography (DSA) and CT arterial por- tography (CTAP). METHODS: Sixteen patients with suspected liver diseases were included in the study. All of them received both dy- namic MRI of the liver using SENSE and digital DSA with CTAP within a two-week interval. The four-phase MRA was reconstructed from source images of the coronal dy- namic study. The arterial phase of the modified MRA was compared with DSA in the evaluation of hepatic arteries and the portal phase compared with CT portography recon- structed from source images of CTAP. In dynamic study of the liver, a fixed dose (20 ml) of contrast medium and scan timing were used. RESULTS: The main branches and variations of the hepatic arterial system were well shown on the modified MRA, al- though the marginal branches of hepatic arteries were of poor quality. The figures of portal veins on MRA were as clear as or superior to those of CTAP. In addition, the su- prarenal inferior vena cava (IVC) was well demonstrated on MRA and/or non contrast-enhanced coronal balanced fast-field echo (b-FFE) scan sequence in most cases. MRI detected most parenchymal lesions of the liver and hemo- dynamics of these lesions could be evaluated on source ima- ges of the modified MRA. MRI/MRA also serendipitously revealed several extrahepatic disease entities or variations that were not found on DSA/CTAP. CONCLUSIONS: The modified MRA using SENSE is a cost-effective modality of examination for the demonstra- tion of the whole hepatic vascular system. Combined with MRI, it has the potential as a one-stop imaging modality in the preoperative evaluation in fields such as OLT. 展开更多
关键词 orthotopic liver transplantation magnetic resonance imaging magnetic resonance angiography digital subtraction angiography
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Head dual energy-computed tomography angiography versus neuro-digital subtraction angiography
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作者 Dan Han Liang Wen Yan Xu 《Neural Regeneration Research》 SCIE CAS CSCD 2010年第24期1910-1914,共5页
Dual-energy X-ray absorptiometry provides two modes of head computed tomography (CT) angiography scanning: neuro-digital subtraction angiography and dual-energy CT angiography (DE-CTA). Previous studies have comp... Dual-energy X-ray absorptiometry provides two modes of head computed tomography (CT) angiography scanning: neuro-digital subtraction angiography and dual-energy CT angiography (DE-CTA). Previous studies have compared image quality, radiation exposure, and bone removal between neuro-digital subtraction angiography and DE-CTA. However, the number of cases was relatively small. The present study examined 300 suspected cases of cerebrovascular disease and observed the methods and duration of post-processing, examination time, and data volume. Results demonstrated similar image quality between the two methods, but lower radiation doses and shorter examination time in DE-CTA. DE-CTA allowed for faster and more stable scanning performance and post-processing methods, facilitating accurate and direct diagnosis of cerebrovascular disease. 展开更多
关键词 tomography X-ray computer dual-source computec/tomography DUAL-ENERGY neuro- digital subtraction angiography cerebral angiography neural regeneration
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Duodenal ulcer caused by coil wiggle after digital subtraction angiography-guided embolization: A case report
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作者 Sheng Xu Shou-Xing Yang +3 位作者 Zhan-Xiong Xue Chang-Long Xu Zhen-Zhai Cai Chang-Zhao Xu 《World Journal of Clinical Cases》 SCIE 2021年第33期10315-10322,共8页
BACKGROUND Acute gastrointestinal bleeding(GIB)is a life-threatening medical emergency with high morbidity and mortality.Transcatheter embolization with endovascular coils under digital subtraction angiography guidanc... BACKGROUND Acute gastrointestinal bleeding(GIB)is a life-threatening medical emergency with high morbidity and mortality.Transcatheter embolization with endovascular coils under digital subtraction angiography guidance is a common and effective method for the treatment of GIB with high technical success rates.Duodenal ulcers caused by coils wiggled from the branch of the gastroduodenal artery,which is a rare complication,have not previously been reported in a patient with right intrathoracic stomach.CASE SUMMARY A 62-year-old man had undergone thoracoscopy-assisted radical resection of esophageal cancer and gastroesophageal anastomosis 3 years ago,resulting in right intrathoracic stomach.He was admitted to the hospital 15 mo ago for dizziness and suffered acute GIB during his stay.Interventional surgery was urgently performed to embolize the branch of the gastroduodenal artery with endovascular coils.After 15 mo,the patient was re-admitted with a chief complaint of melena for 2 d,esophagogastroduodenoscopy and abdominal computed tomography revealed that some endovascular coils had migrated into the duodenal bulb,leading to a deep ulcer.Bleeding was controlled after conservative treatment.Seven months later,duodenal balloon dilatation was performed to relieve the stenosis after the removal of a few coils,and the patient was safely discharged with only one coil retained in the duodenum due to difficulties in complete removal and risk of bleeding.Mild melena recurred once during the long-term follow-up.CONCLUSION Although rare,coil wiggle after interventional therapy requires careful attention,effective precautionary measures,and more secure alternative treatment methods. 展开更多
关键词 digital subtraction angiography ENDOSCOPY Esophageal neoplasms Gastrointestinal hemorrhage Duodenal ulcer Case report
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Observation on 108 Normal Ophthalmic Arteries in 80 Patients by Digital Subtraction Angiography
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作者 Dongrun Tang, Guoxiang Song, Shimin Cui, Lingen Chen, Qingbin LiDepartment of Ophthalmology, the Second Affiliated Hospital, Tianjin Medical UniversityTianjin 300211, ChinaDepartment of Neurosurgery, Tianjin Huan Hu Hospital 《眼科学报》 1994年第3期157-162,共6页
By digital subtraction angiography(DSA), the authors made observations on 108 normal ophthalmic arteries in 80 patients with regard to the origins, courses, branching, morphology and anastomoses of the vessels. The me... By digital subtraction angiography(DSA), the authors made observations on 108 normal ophthalmic arteries in 80 patients with regard to the origins, courses, branching, morphology and anastomoses of the vessels. The merits and demerits of DSA in observing the ophthalmic artery were discussed. Eye Science 1994; 10: 157- 162. 展开更多
关键词 ORBIT ophthalmic artery(OA) ANGIOGRAPHY digital subtraction
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Use of digital subtraction angiography for assessment of digital replantation 被引量:5
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作者 Liu-hong WANG Guang-qiang ZHANG 《Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)》 SCIE CAS CSCD 2012年第3期209-212,共4页
Objective: To assess the blood flow of the proper digital artery using digital subtraction angiography (DSA) in the early stage after replantation. Methods: From January 2006 to October 2010, 27 anastomosed arteries i... Objective: To assess the blood flow of the proper digital artery using digital subtraction angiography (DSA) in the early stage after replantation. Methods: From January 2006 to October 2010, 27 anastomosed arteries in 27 replanted digits were included in the study. The patients included nine males and four females. The patients received DSA at 48 to 96 h after digital replantation. Based on DSA image, the blood flow was classified into normal, slow-running, and flow-stopping types. The patients with normal digital blood flow were given continuous routine treatments; the patients with slow-running flow were given the conservative treatments, such as release of the tight dressings, removal of stitches, keeping warm, the use of massage, and the use of anticoagulants and anti-inflammatory drugs; the patients with flow-stopping received immediate surgical re-exploration. Results: In this series, 23 digits in 11 patients showed a normal blood flow, and these digits all survived. In one of 13 patients, two digits which displayed slow-running flow also survived after conservative treatments. In two of 13 patients, two digits showed flow stopping, with one surviving and one failing after re-exploration and arterial revision. Conclusions: The DSA can be used to assess the blood flow of the proper digital artery in the early stage after replantation. It provides essential information for salvaging the replanted finger. 展开更多
关键词 digital subtraction angiography Proper digital artery REPLANTATION Blood flow
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Classification and digital subtraction angiography evaluation of carotidcavernous fistulas
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作者 张子曙 黄祥龙 +1 位作者 沈天真 陈星荣 《Chinese Medical Journal》 SCIE CAS CSCD 1999年第8期63-66,共4页
Objective To investigate the role of digital subtraction angiography (DSA) in evaluation of carotid cavernous fistulas, and to initiate a new classification for carotid cavernous fistula Methods Cerebral angiograp... Objective To investigate the role of digital subtraction angiography (DSA) in evaluation of carotid cavernous fistulas, and to initiate a new classification for carotid cavernous fistula Methods Cerebral angiography and selective external and internal carotid angiography were carried out in 56 patients who were classified into 5 types according to their hemodynamic features Results The types were A (38 patients), B (4), C (10), D (2), and E (2) One of the 38 direct fistulas was located at C1 of the cavernous segment Fistulas at C2 were observed in 10 patients, at C3 in 4, at C4 in 10 and at C5 in 5 The anterior communicating arteries were patent and well compensated in 33 of the 56 patients The posterior communicating arteries were patent and well compensated in 39 patients Both communicating arteries were well compensated in 31 patients Fifty of the 56 patients were drained by ophthalmic veins, 47 by inferior petrous sinuses, 18 by cortical veins, and 8 to the posterior fossa region Conclusions Digital subtraction angiography was helpful in localization of the rents in carotid cavernous fistulas, in evaluation of function of Willis circles and provided valuable information for treatment of carotid cavernous fistulas Carotid cavernous fistulas were divided into 5 categories: type A, B, C, D and E, among which type E was not previously described elsewhere 展开更多
关键词 carotid cavernous fistula CLASSIFICATION digital subtraction angiography
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Left inferior phrenic arterial malformation mimicking gastric varices: A case report and review of literature
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作者 Han Wang Yi-Qing Tan +6 位作者 Ping Han An-Hui Xu Han-Lin Mu Zhe Zhu Li Ma Mei Liu Hua-Ping Xie 《World Journal of Gastrointestinal Surgery》 SCIE 2024年第9期3057-3064,共8页
BACKGROUND Gastric submucosal arterial dilation resulting from splenic artery occlusion represents an exceedingly rare etiology of acute upper gastrointestinal bleeding(UGIB).Although endoscopy is a widely utilized di... BACKGROUND Gastric submucosal arterial dilation resulting from splenic artery occlusion represents an exceedingly rare etiology of acute upper gastrointestinal bleeding(UGIB).Although endoscopy is a widely utilized diagnostic and therapeutic modality for gastrointestinal bleeding,it has limitations in detecting arterial abnormalities.CASE SUMMARY This report presents a rare case of massive UGIB in a 57-year-old male with a tortuous left inferior phrenic artery accompanied by splenic artery occlusion.“Gastric varices”was identified during the patient's endoscopy one year before hemorrhage.Despite initial hemostasis by endoscopic clipping,the patient experienced massive rebleeding after one month,requiring intervention with transcatheter arterial embolization(TAE)to achieve hemostasis.CONCLUSION This is the first case to report UGIB due to a tortuous left inferior phrenic artery.This case highlights the limitations of endoscopy in identifying arterial abnormalities and emphasizes the potential of TAE as a viable alternative for the management of arterial bleeding in the gastrointestinal tract. 展开更多
关键词 Upper gastrointestinal bleeding Left inferior phrenic artery Splenic artery occlusion Gastrointestinal endoscopy digital subtraction angiography Case report
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Manifestations of hepatic cavernous hemangioma in carbon dioxidedigi-tal subtraction angiography
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作者 卢伟 李彦豪 +2 位作者 何晓峰 陈勇 曾庆乐 《Journal of Medical Colleges of PLA(China)》 CAS 2002年第2期134-138,共5页
Objective: To describe the characteristic appearance of cavernous hemangioma of the liver (CHL) presented in carbon dioxide digital subtraction angiography (CO2-DSA) and to evaluate the significance of CO2-DSA in the ... Objective: To describe the characteristic appearance of cavernous hemangioma of the liver (CHL) presented in carbon dioxide digital subtraction angiography (CO2-DSA) and to evaluate the significance of CO2-DSA in the diagnosis of CHL. Methods: Both CO2-DSA and iodinated contrast DSA (IC-DSA) were performed in all 16 patients with CHL, and the angiographic manifestations in the same patients were compared. The image quality was rated by three experienced angiographers, and the complications were also assessed. Results: There was good correlation between angiographers on image quality (R = 0. 73). Diagnostic images were obtained with both CO2-DSA and IC-DSA in all CHL patients. No difference was noted between IC-DSA and CO2-DSA in visualizing the proper hepatic arteries and its branches (P>0. 05). CO2-DSA produced better images that clearly described the tumor size, shape and margination than those by IC-DSA (P< 0. 05), but both demonstrated characteristic appearances of early opacification and persistent contrast enhancement of the tumors. The portal vein branches near the tumors were constantly demonstrated by CO2-DSA in 15 cases (15/16) but only in 2 cases (2/16) by IC-DSA. Conclusion: CO2-DSA is sensitive in CHL diagnosis, and in patients with contraindications to IC or with unsatisfactory imaging results by IC-DSA, CO2-DSA is a good alternative. As show in most cases by CO2-DSA, the portal veins might act as the main drainage vein of CHLs. 展开更多
关键词 carbon dioxide digital subtraction angiography cavernous hemangioma LIVER
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Ultrasound-guided carotid angioplasty and stenting in a patient with iodinated contrast allergy:A case report 被引量:1
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作者 Le Li Zi-Yan Wang Bo Liu 《World Journal of Clinical Cases》 SCIE 2023年第25期5926-5933,共8页
BACKGROUND Ischemic stroke is an entity with high incidence,morbidity,and mortality rates.Carotid artery stenosis is an important and independent risk factor for ischemic stroke.The three current approaches for treati... BACKGROUND Ischemic stroke is an entity with high incidence,morbidity,and mortality rates.Carotid artery stenosis is an important and independent risk factor for ischemic stroke.The three current approaches for treating carotid artery stenosis are drug treatment,carotid endarterectomy(CEA),carotid angioplasty and stenting(CAS).The approach is chosen based on the degree of stenosis.CEA or CAS could have been chosen for the current patient,who had severe carotid stenosis and an iodinated contrast allergy.After thoroughly communicating with the patient,the patient chose CAS for treatment.Therefore,we performed ultrasound-guided CAS to avoid the use of iodinated contrast.CASE SUMMARY The main symptoms of the patient were numbness and weakness of the left limb.Computed tomography angiography of the head and neck at another hospital indicated multiple sites of stenosis in the arteries of the head and neck.The patient requested CAS for treatment but was allergic to iodinated contrast media.Thus,routine digital subtraction angiography(DSA)with iodinated contrast could not be used for the procedure.The diagnosis of this patient was as follows:(1)Right parietal lobe cerebral infarction;(2)multiple sites of stenosis in the arteries of the head and neck(severe stenosis of the right internal carotid artery,severe stenosis of the right subclavian artery);(3)right subclavian steal syndrome;and(4)hypertension(stage 3,high risk).The interventions included routine treatment for cerebral infarction,oral administration of clopidogrel(75 mg qd)and aspirin(100 mg qd),ultrasound-guided CAS,and postoperative follow-up.Postoperative color Doppler ultrasound and cerebrovascular magnetic resonance angiography of the carotid artery showed good vascular recovery,and the postoperative follow-up indicated a good prognosis.CONCLUSION This case study suggests that ultrasound-guided endovascular treatment is a potential option for patients with contraindications to the iodinated contrast agents used in DSA-guided surgery,although excellent surgical operating skills are needed. 展开更多
关键词 Iodinated contrast allergy ULTRASOUND-GUIDED Gadolinium-based contrast agent Carotid angioplasty and stenting Subclavian artery angioplasty and stenting digital subtraction angiography Case report
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Image-based visualization of stents in mechanical thrombectomy for acute ischemic stroke:Preliminary findings from a series of cases
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作者 Qing-Yang Yao Mao-Lin Fu +3 位作者 Qing Zhao Xiao-Ming Zheng Kai Tang Li-Ming Cao 《World Journal of Clinical Cases》 SCIE 2023年第21期5047-5055,共9页
BACKGROUND Mechanical thrombectomy is the most effective treatment for great cerebral artery embolization within a set time window.Typically,an arteriogram does not show the localization of the stent after release and... BACKGROUND Mechanical thrombectomy is the most effective treatment for great cerebral artery embolization within a set time window.Typically,an arteriogram does not show the localization of the stent after release and whether a thrombus is captured or not.Thus,improving the visualization of a stent in interventional therapy will be helpful for clinicians.AIM To analyze stent imaging findings to enhance clinicians’understanding of a special circumstance,wherein a Solitaire AB retrievable stent was visible during the imaging of a thrombus capture that improved the success rate of stent-based mechanical thrombectomy.METHODS This was a retrospective study with four acute ischemic stroke(AIS)patients who underwent stent-based mechanical thrombectomy.RESULTS Patient 1 was a 64-year-old man admitted after 5 h of confusion;angiography revealed basilar artery occlusion.We inserted a stent into the left posterior cerebral artery-P2 segment and visualized the expanded stent that successfully captured a thrombus.Patient 2 was a 74-year-old man admitted with confusion,which lasted approximately 3 h.Angiography revealed a left middle cerebral artery(MCA)-M1 segment occlusion.A stent was deployed in the distal M2 segment,and we could visualize the stent by capturing the thrombus.Patient 3 was a 74-year-old woman admitted after experiencing left hemiplegia for 3 h.We deployed a stent at the distal right MCAM2 segment,and the developing stent captured a large thrombus.Patient 4 was an 82-year-old man who presented with confusion for 3 h.A developing stent was placed in the distal left MCA-M1 segment,which captured a large thrombus and several fragmented thrombi.CONCLUSION To the best of our knowledge,this is the first report of stent imaging in patients with AIS.We demonstrated the usefulness and substantial potential of stent imaging in stent-based mechanical thrombectomy for AIS. 展开更多
关键词 digital subtraction angiography Solitaire AB stent Acute ischemic stroke Stent-based mechanical thrombectomy Visualization of stents
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Computed tomography perfusion in evaluating the therapeutic effect of transarterial chemoembolization for hepatocellular carcinoma 被引量:35
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作者 Guang Chen Da-Qing Ma Wen He Bao-Feng Zhang Li-Qin Zhao 《World Journal of Gastroenterology》 SCIE CAS CSCD 2008年第37期5738-5743,共6页
AIM: To prospectively assess the changes in parameters of computed tomography (CT) perfusion pre- and post-transarterial chemoembolization (TACE) of hepatocellular carcinoma (HCC) in different treatment respons... AIM: To prospectively assess the changes in parameters of computed tomography (CT) perfusion pre- and post-transarterial chemoembolization (TACE) of hepatocellular carcinoma (HCC) in different treatment response groups, and to correlate the changes with various responses of HCC to TACE. METHODS: Thirty-nine HCC patients underwent CT perfusion examinations pre-(1 d before TACE) and post-treatment (4 wk after TACE). The response evaluation criteria for solid tumors (RECIST) were referred to when treatment responses were distributed. Wilcoxon-signed ranks test was used to compare the differences in CT perfusion parameters pre- and post- TACE for different response groups. RESULTS: Only one case had treatment response to CR and the CT perfusion maps of post-treatment lesion displayed complete absence of signals. In the PR treatment response group, hepatic artery perfusion (HAP), hepatic arterial fracture (HAF) and hepatic blood volume (HBV) of viable tumors post-TACE were reduced compared with pre-TACE (P = 0.001, 0.030 and 0.001, respectively). In the SD group, all CT perfusion parameters were not significantly different pre- and post-TACE. In the PD group, HAP, HAl=, portal vein perfusion (PVP) and hepatic blood flow (HBF) of viable tumors post-TACE were significantly increased compared with pre-TACE (P = 0.005, 0.012, 0.035 and 0.005, respectively). CONCLUSION: Changes in CT perfusion parameters of viable tumors are correlated with different responses of HCC to TACE. Therefore, CT perfusion imaging is a feasible technique for monitoring response of HCC to TACE. 展开更多
关键词 Hepatocellular carcinoma Computed tomography Transarterial chemoembolization digital subtraction arteriography Region of interest
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Application of gemstone spectral imaging for efficacy evaluation in hepatocellular carcinoma after transarterial chemoembolization 被引量:15
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作者 Qi-Yu Liu Chuan-Dong He +6 位作者 Ying Zhou Dan Huang Hua Lin Zhong Wang Dong Wang Jin-Qiu Wang Li-Ping Liao 《World Journal of Gastroenterology》 SCIE CAS 2016年第11期3242-3251,共10页
AIM: To assess the value of gemstone spectral imaging (GSI) in efficacy evaluation in hepatocellular cancer (HCC) after transcatheter arterial chemoembolization (TACE) treatment.METHODS: Thirty patients with HCC under... AIM: To assess the value of gemstone spectral imaging (GSI) in efficacy evaluation in hepatocellular cancer (HCC) after transcatheter arterial chemoembolization (TACE) treatment.METHODS: Thirty patients with HCC underwent GSI, including nonenhanced, arterial, portalvenous and delayed phase scans, after TACE treatment. Arterial phase images were acquired with GSI for reconstruction of virtual nonenhanced images and color overlay images. Digital subtraction angiography (DSA) was performed in all these patients. Two blinded and independent readers evaluated the data in two reading sessions; standard nonenhanced, arterial, portalvenous, and delayed phase images were read in session A, and the optimal monochromatic images, iodine/water based images and spectrum features were read in session B. Sensitivity and specificity were calculated with the DSA data as the reference standard. The sensitivity and specificity were compared using the &#x003c7;<sup>2</sup> test.RESULTS: DSA revealed 154 lesions in 30 patients, and 100 of them had blood supply. Overall sensitivity and specificity were 72% (72/100) and 77.8% (42/54) for session A, and 97% (97/100) and 94.4% (51/54) for session B, respectively. The sensitivity and specificity of the two reading sessions were significantly different (&#x003c7;<sup>2</sup> = 23.04, &#x003c7;<sup>2</sup> = 7.11, P &#x0003c; 0.05).CONCLUSION: Compared with conventional CT, GSI could significantly improve the detection of small and multiple lesions without increasing the radiation dose. Based on spectrum features, GSI could assess tumor homogeneity and more accurately identify residual tumors and recurrent or metastatic lesions during efficacy evaluation and follow-up in HCC after TACE treatment. 展开更多
关键词 Gemstone spectral imaging Hepatocellular carcinoma Transcatheter arterial chemoembolization digital subtraction angiography Efficacy evaluation
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Splanchnic vein thrombosis in necrotizing acute pancreatitis: Detection by computed tomographic venography 被引量:9
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作者 Wei Jiang Jing Zhou +4 位作者 Lu Ke Gang Li Zhi-Hui Tong Wei-Qin Li Jie-Shou Li 《World Journal of Gastroenterology》 SCIE CAS 2014年第44期16698-16701,共4页
AIM: To assess the diagnostic accuracy of computed tomographic venography(CTV) for splanchnic vein thrombosis(SVT) detection in necrotizing acute pancreatitis(AP) patients.METHODS:Forty-three patients with necrotizing... AIM: To assess the diagnostic accuracy of computed tomographic venography(CTV) for splanchnic vein thrombosis(SVT) detection in necrotizing acute pancreatitis(AP) patients.METHODS:Forty-three patients with necrotizing AP who underwent both CTV and digital subtraction angiography(DSA)within 3 d were analyzed in this retrospective comparative study.All CTV procedures were performed with a dual-source CT scanner.The presence and location of SVT were determined via blinded imaging data analyses.RESULTS:According to the DSA results,17(39.5%)of the total 43 patients had SVT.The sensitivity,specificity,positive and negative predictive values of CTV for SVT detection were 100%(95%CI:77.1%-100%),92.3%(95%CI:73.4%-98.7%),89.5%(95%CI:65.5%-98.2%)and 100%(95%CI:82.8%-100%),respectively.CONCLUSION:CTV is an effective examination for SVT detection in patients with necrotizing AP with high positive and negative predictive values. 展开更多
关键词 Splanchnic vein THROMBOSIS Necrotizing acute pancreatitis Computed tomographic venography digital subtraction angiography
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A more consistent intraluminal rhesus monkey model of ischemic stroke 被引量:6
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作者 Bo Zhao Guowei Shang +11 位作者 Jian Chen Xiaokun Geng Xin Ye Guoxun Xu Ju Wang Jiasheng Zheng Hongjun Li Fauzia Akbary Shengli Li Jing Lu Feng Ling Xunming Ji 《Neural Regeneration Research》 SCIE CAS CSCD 2014年第23期2087-2094,共8页
Endovascular surgery is advantageous in experimentally induced ischemic stroke because it causes fewer cranial traumatic lesions than invasive surgery and can closely mimic the pathophysiology in stroke patients. Howe... Endovascular surgery is advantageous in experimentally induced ischemic stroke because it causes fewer cranial traumatic lesions than invasive surgery and can closely mimic the pathophysiology in stroke patients. However, the outcomes are highly variable, which limits the accuracy of evaluations of ischemic stroke studies. In this study, eight healthy adult rhesus monkeys were randomized into two groups with four monkeys in each group: middle cerebral artery occlusion at origin segment (M1) and middle cerebral artery occlusion at M2 segment. The blood flow in the middle cerebral artery was blocked completely for 2 hours using the endovascular microcoil placement technique (1 mm × 10 cm) (undetachable), to establish a model of cerebral ischemia. The microcoil was withdrawn and the middle cerebral artery blood flow was restored. A reversible middle cerebral artery occlusion model was identified by hematoxylin-eosin staining, digital subtraction angiography, magnetic resonance angiography, magnetic resonance imaging, and neurological evaluation. The results showed that the middle cerebral artery occlusion model was successfully established in eight adult healthy rhesus monkeys, and ischemic lesions were apparent in the brain tissue of rhesus monkeys at 24 hours after occlusion. The rhesus monkeys had symptoms of neurological deficits. Compared with the M1 occlusion group, the M2 occlusion group had lower infarction volume and higher neurological scores. These experimental findings indicate that reversible middle cerebral artery occlusion can be produced with the endovascular microcoil technique in rhesus monkeys. The M2 occluded model had less infarction and less neurological impairment, which offers the potential for application in the field of brain injury research. 展开更多
关键词 nerve regeneration brain injury rhesus monkeys model middle cerebral artery MICROCOIL INFARCTION stroke interventional therapy digital subtraction angiography magnetic resonance image NEUROIMAGING NEUROREGENERATION
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Evaluation of characteristics of left-sided colorectal perfusion in elderly patients by angiography 被引量:7
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作者 Chao Zhang Ang Li +3 位作者 Tao Luo Yu Li Fei Li Jia Li 《World Journal of Gastroenterology》 SCIE CAS 2020年第24期3484-3494,共11页
BACKGROUND Handling of the inferior mesenteric artery(IMA)and maintaining anastomotic perfusion are important in radical resection of left-sided colorectal cancer.However,the branching of this artery and the drainage ... BACKGROUND Handling of the inferior mesenteric artery(IMA)and maintaining anastomotic perfusion are important in radical resection of left-sided colorectal cancer.However,the branching of this artery and the drainage patterns of this vein vary among individuals,and the characteristics and perfusion region of this artery in elderly patients remain unclear.AIM To evaluate the characteristics and perfusion region of the IMA in elderly patients using angiography.METHODS We enrolled 154 patients(>65 years old)who underwent digital subtraction angiography of the IMA.The characteristics,bifurcation,and distribution of the IMA and termination of the anastomotic perfusion of the left colon and rectum were examined using digital subtraction angiography.Collateral arterial arches and the IMA hemoperfusion region were also recorded.Perfusion regions were cross-referenced with clinical and anatomical features by the univariate analysis.RESULTS Of 154 patients,25(16.2%)had IMA lesions.The left colic artery arose independently from the IMA in 44.2%of patients,shared a trunk with the sigmoid artery in 35.1%,shared an opening with the sigmoid and superior rectal arteries in 16.9%,and was absent in 5.1%.The IMA perfusion region stopped at the splenic flexure in 50(32.5%)patients.The collateral circulation existed in the colonic perfusion region,including the marginal artery(Drummond’s artery),the ascending branch of the left colonic artery to supply the transverse colon,and the arc of Riolan with a frequency of 100%,22.7%,and 1.9%,respectively.The IMA perfusion region was independently associated with the comorbidity of atherosclerosis,IMA atherosclerotic lesion,branching pattern,collateral circulation,and marginal artery integrity.CONCLUSION The IMA and its branches are prone to arteriosclerosis,and IMA perfusion may be interrupted at the splenic flexure in elderly patients.The applicability and precision of preoperative angiography for evaluating the IMA branching and perfusion patterns could facilitate geriatric laparoscopic left-sided colorectal cancer surgery with suspicion of poor IMA perfusion. 展开更多
关键词 ANATOMY digital subtraction angiography ELDERLY Inferior mesenteric artery Left-sided colorectum
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