ObjectiveTo observe the effectiveness of digital subtraction angiography (DSA) assisted musculoskeletal flap transplantation in the treatment of osteonecrosis of the femoral head (ONFH).MethodsThe clinical data of 15 patients with 15 hips of ONFH admitted between January 2016 and December 2019 were retrospectively analyzed. All patients were male, aged 20-45 years, with an average age of 31.6 years. There were hormone type in 9 cases and alcohol type in 6 cases. The disease duration ranged from 15 days to 3 years, with an average of 8 months. The Association Research Circulation Osseous (ARCO) staging: 4 hips in stage Ⅱ, 11 hips in stage Ⅲ. The preoperative visual analogue scale (VAS) score was 6.2±0.2, and the Harris score of the hip joint was 57.3±1.3. Preoperative DSA examination of the femoral head was performed to determine the location of vascular lesions of the femoral head. According to the results of the angiography, the surgical selection of the musculoskeletal flap was guided. For the patients with both superior and inferior retinaculum vessels developed, simple core decompression was performed. For the patients with superior retinaculum vessels developed but inferior retinaculum vessels not developed, anterolateral tensor fasciae flap was used. For the patients whose superior retinaculum did not develop and the inferior retinaculum developed, posterolateral quadratus femoris flap was used. The fibular flap with anastomotic vessels was used in the patients whose superior and inferior retinaculum vessels were not developed.ResultsAll 15 cases of 15 hips were followed up 6-24 months, with an average of 14 months. During the follow-up, the patient’s ONFH did not worsen, the femoral head did not collapse, the joint space was normal, and the hip joint fextion and extension function was acceptable. At last follow-up, the VAS score was 1.9±0.2, and the hip Harris score was 92.1±0.8, both of which were significantly improved when compared with preoperative ones (t=14.85, P=0.00; t=23.22, P=0.00).ConclusionFor patients with ONFH who need musculoskeletal flap transplantation, preoperative DSA of femoral head can determine the location of vascular lesions of femoral head, so as to guide the selection of musculoskeletal flap transplantation, which is of great significance for hip-conserving surgery.
Objective To observe the complication after embolizing the bilateral internal il iac arteries and the median sacral artery of dogs by different combinations and embolization levels with gelfoam particle, and to provide a reference for safety appl ication of gelfoam in cl inic. Methods Sixteen common grade adult healthy dogs (weighing 10-13 kg, 14 males and 2females) were randomly divided into 5 groups. Under the monitoring of digital subtraction angiography (DSA), the embolization was performed with gelfoam particle (diameter, 50-150 μm) in bilateral internal il iac arteries and the main branch of the median sacral artery (group A, n=3), in bilateral internal il iac arteries and the first branch of the median sacral artery (group B, n=3), in the main branch of bilateral internal il iac arteries (group C, n=3), in the unilateral internal il iac artery and the main branch of the median sacral artery (group D, n=4), and in the main branch of unilateral internal il iac artery (group E, n=3). Under the DSA, the anatomic relationships of the abdominal aorta, bilateral external il iac arteries, bilateral internal il iac arteries, and median sacral artery were observed before embol ization. The survival dogs were observed and the specimens of bladder, rectum, sciatic nerve, and gluteal muscles were harvested for the general and histological observations at 3 days after embolization. Results In dogs, there was no common il iac artery; bilateral external il iac arteries originated from the abdominal aorta and the starting of the median sacral artery had variation. Seven dogs (3 in group A, 3 in group C, and 1 in group D) died within 2 days after embolization, and the others survived to the end of the experiment. In the dead dogs of groups A, C, and D, the darkening and necrosis of the rectum were observed; the bladder presented lamellar obfuscation and focal hemorrhage and edema; and the median urinary volume in bladder was 270.6 mL. In survival dogs, no obvious change was observed in the rectum; the bladder only manifested l ight edema; and the median urinary volume in bladder was 137.0, 220.5, and 28.0 mL, respectively in groups B, D, and E.The rectum and bladder of dead dogs in groups A, C, and D manifested the disrupted cells, generous inflammatory cells infiltration, and desquamation of epithel ial cells; the rectum and bladder of survival dogs in groups B, D, and E manifested l ight inflammatory cells infiltration and edema; the embol ized artery mainly focused on the arterioles whose diameter was 100-200 μm. The sciatic nerve and gluteal muscles of each group had no obvious change except for l ight edema. Conclusion When the internal il iac artery and median sacral artery are embol ized with gelfoam particle with a diameter of 50-150 μm, to ensure the safeness of pelvic organs, the embol ized artery can not exceed the first branch when the 3 arteries are embol ized at the same time, or reserve at least unilateral internal il iac artery when embol ized to the trunk , or it will result in pelvic organ necrosis and perforation.
ObjectiveTo explore the application value of digital subtraction angiography (DSA) in repairing foot and ankle wounds with posterior tibial arterial perforator flaps. MethodsBetween January 2010 and May 2014, 12 cases of foot and ankle wounds were repaired using posterior tibial arterial perforator flaps. There were 7 males and 5 females with an average age of 36 years (range, 22-54 years). The causes were machine injury in 2 cases, falling injury in 3 cases, and traffic accident injury in 7 cases. The disease duration ranged from 7 to 45 days (mean, 16 days). The size of wound ranged from 6 cm×4 cm to 10 cm×5 cm. Preoperative DSA was performed to observe the orientation and distribution of the posterior tibial arterial perforator and the relationship between perforator vessels. Correspondently, the flaps were designed and harvested. The size of flap ranged from 7 cm×5 cm to 11 cm×6 cm. The donor sites were repaired with skin grafts. ResultsPosterior tibial arterial perforator vessels send out ascending branches and descending branches while going down in the superficial layer. All branches were connected to form vertical chain-form anastamosis, and its orientation was consistent with limb vertical axis. According to DSA results, the flaps were designed and harvested easily. All flaps survived after operation. Meanwhile, wounds healed by first intention. All skin grafts at donor site survived. All patients were followed up 6 months. The flaps had good appearance, color, and texture. No ulcer was found. Affected feet had normal walking function. ConclusionThe size, distribution, and chain-form anastamosis condition of the posterior tibial arterial perforator vessels can be accurately observed by DSA, which provides imaging evidence for harvesting posterior tibial arterial perforator flaps and improves the success rate for repairing foot and ankle wounds.
目的 提高对创伤性假性动脉瘤并动静脉瘘的影像诊断水平。 方法 报告1例腰椎间盘手术所致的创伤性假性动脉瘤并动静脉瘘，比较分析MRA和DSA对该病的诊断价值。 结果 MRA能够明确创伤性假性动脉瘤及动静脉瘘的诊断，与DSA有良好的相关性。 结论 MRA对创伤性假性动脉瘤并动静脉瘘的确诊有重要价值，在一定程度上能够代替常规血管造影。
Objective To discuss the clinical application value of CT angiography (CTA) in traumatic pelvic artery pseudoaneurysm and dissecting aneurysm. Methods A total of 8 patients including 7 with traumatic pelvic artery pseudoaneurysm and 1 with dissecting aneurysm diagnosed by CTA in Suining Central Hospital from August 2012 to January 2016 were enrolled in this study, in whom 6 patients with traumatic pseudoaneurysm treated with embolotherapy were confirmed by digital subtraction angiography. Image post-processing techniques of CTA including curve planar reformation, multiplanar reconstruction and volume rendering were used. Results In the seven patients diagnosed as solitary traumatic pelvic artery pseudoaneurysm by CTA, 3 had superior gluteal artery pseudoaneurysm, 2 had inferior gluteal artery pseudoaneurysm, and 2 had external iliac artery pseudoaneurysm. The 7 pseudoaneurysms were pouch-shaped with the short diameters ranged from 9 to 64 mm and the long diameters ranged from 11 to 78 mm. Six locations of artery laceration were displayed clearly, thereinto 1 case was combined with arteriovenous fistula. In addition, a vessel occlusion caused by the limitation of right external iliac artery dissecting aneurysm and the thrombosis in left side of the external iliac artery was found in 1 case. Conclusions As a non-invasive diagnostic technique, CTA can accurately diagnose traumatic pelvic artery pseudoaneurysm and dissecting aneurysm, clearly display the location relationship of pseudoaneurysm and its parent artery, and find whether arteriovenous fistula exists. Beyond that, the true and false lumen of dissecting aneurysm can be precisely identified by this technique. CTA can provide important image information for formulating individual treatment plan.
ObjectiveTo analysis the risk factors for carotid stenosis in patients with ischemic cerebrovascular disease based on digital subtraction angiography. MethodsA total of 312 patients diagnosed with ischemic cerebrovascular disease who underwent digital subtraction angiography from June 2011 to September 2013 were selected.The risk factors of carotid stenosis were analysised by multivariate logistic regression analysis. ResultsIn 312 patients,271 were with cerebral infarction and 41 were transient ischemic attack patients.There were 149 patients in carotid stenosis group (stenosis degree ≥50%) and 163 patients in control group (stenosis degree<50%).The age (OR=1.037,P=0.000) and coronary heart disease (OR=4.121,P=0.001) were independent risk factors of carotid stenosis with ischemic cerebrovascular disease. ConclusionCarotid stenosis is common in ischemic cerebrovascular disease.Age and coronary heart disease were the independent risk factors.The recognition and control of these risk factors are in favor of secondary prevention of ischemic cerebrovascular disease.
ObjectiveTo investigate the value of head boneless CT angiography (CTA) for surface shaded display (SSD) (hereinafter referred to as the SSD-CTA technology) and volume computed tomographic digital subtraction angiography (VCTDSA) in diagnosing intracranial aneurysms. MethodsWe collected the clinical data of 35 patients diagnosed to have intracranial aneurysm by VCTDSA between April 2013 and November 2014 from the First Affiliated Hospital of Chongqing Medical University. The original data were imported into the CT workstation of the First People's Hospital of Chengdu. Then, SSD-CTA technology was performed for bone reconstruction. We compared the results of these two technologies. In addition, we selected another 27 patients diagnosed with intracranial aneurysm by SSDCTA and DSA examination at the same time between June 2012 and November 2014 in the First People's Hospital of Chengdu for comparison. ResultsThe quality score of SSD-CTA reconstructed image was lower than that of VCTDSA, but the diagnosis of the two technologies for intracranial aneurysm was not statistically different (P>0.05). Compared with DSA, the sensitivity and specificity of the diagnosis for intracranial aneurysms by SSD-CTA were both 100%. ConclusionSSD-CTA is valuable in diagnosing intracranial aneurysms.