Objective To explore the relationship between the level of plasma ADAMTS4 and the vulnerability of carotid atherosclerotic plaque in patients with carotid artery stenosis and the clinical value of evaluating the vulnerability of the carotid atherosclerotic plaque.Methods 60 patients with carotid artery stenosis were divided into stable plaque group and vulnerable plaque group according to the histopathological typing after carotid endarterectomy (CEA).30 patients who had atherosclerosis but no carotid plaque formation served as control.Using ELISA to measure the level of plasma ADAMTS4.Results The level of plasma ADAMTS4 was significantly higher in the vulnerable-plaque group (112.74 ± 17.47) ng/ml compared with the stable plaque group (56.67 ± 22.14)ng/ml and the control group (56.67 ± 22.14)ng/ ml,P ＜ 0.001.Logistic analysis showed that high level of plasma ADAMTS4 was risk factor for vulnerability of carotid atherosclerotic plaque (P ＜ 0.05,OR =8.240,95 ％ CI:1.512-22.915).ROC curve showed that ADAMTS4 =100.935 ng/ml could accurately predict significant vulnerability with accuracy of 94.3％.Conclusion ADAMTS4 is an effective,sensitive and non-invasive biomarker to evaluate the vulnerability of carotid atherosclerotic plaque.

Objective:To explore the clinical efficacy of targeted interventional embolization therapy by a multidisciplinary team for the hemorrhagic shock caused by acute pelvic fracture or/and acetabular fracture.Methods:A retrospective study was conducted to analyze the data of 63 patients with hemorrhagic shock caused by pelvic fracture or/and acetabular fracture who had been admitted to Department of Orthopaedics, The Second Hospital of Shanxi Medical University from January 2015 to July 2022. There were 44 males and 19 females with an age of (39.6±15.6) years, and 23 pelvic fractures, 35 acetabular fractures, and 5 pelvic and acetabular fractures. The time from injury to targeted interventional embolization therapy was 2.67 (2.00, 3.33) hours. All the patients were treated with targeted interventional embolization therapy by a multidisciplinary team involving orthopedics, interventional medicine, general surgery, and urology. The shock index and lactate level within 12 hours after therapy, 24-hour urine output, and incidence of complications 3 weeks after therapy were recorded.Results:No bleeding was found again in the 63 patients after embolization. Within 12 hours after therapy, the shock index was ≤1.0, indicating the shock was corrected. Within 12 hours after targeted interventional embolization therapy, the shock index (0.70±0.46) and lactate value [(2.03±1.35) mmol/L] in the 63 patients were significantly lower than those before therapy [(1.76±0.56) and (4.53±1.74) mmol/L] ( P<0.05). The 24-hour urine output [(50.26±20.38) mL/h] was significantly higher than that before therapy [(21.56±1.27) mL/h] ( P<0.05). Two patients experienced poor blood circulation in the distal skin of the great toe, which was relieved after treatment with blood circulation promotion and anticoagulation. Three patients developed necrosis of the hip soft tissue, which was cured after multiple times of debridement and anti-infection treatments. One patient with severe injury died from multiple organ dysfunction. Conclusions:The targeted interventional embolization therapy can not only diagnose the bleeding location in patients with hemorrhagic shock caused by pelvic fracture or/and acetabular fracture, but also timely and accurately carry out hemostatic treatment to correct shock. Moreover, a multidisciplinary team can help patients avoid multiple surgeries and decrease their pain and financial loss.

Objective To discuss the application of the"rotating guidewire and correcting the filter recovery hook direction technique"("rotation-correction loop technique"for short),a technique invented by the authors in clinical practice,in the retrieval of complex inferior vena cava filter(IVCF),and to discuss its technical skills and advantages.Methods The clinical data of 417 patients carrying an IVCF,who were admitted to the Department of Vascular Surgery of Second Hospital of Shanxi Medical University of China to retrieve IVCF between January 2022 and December 2022,were retrospectively analyzed.Taking the time spent on the retrieval of IVCF and the intraoperative radiation dose as the evaluation indicators,the advantages and disadvantages of the standard filter retrieval technique,the"rotation-correction loop technique"and the other loop-assisted techniques were compared.Results Both the intraoperative radiation dose and the time spent on the retrieval of IVCF using"rotation-correction loop technique"were remarkably lower than those of other loop-assisted techniques(P＜0.000 1).Conclusion For the retrieval of complex IVCF,especially for the IVCF which is heavily tilted and/or its recovered hook is attached to the vascular wall,the use of"rotation-correction loop technique"can shorten the time spent on the the retrieval of IVCF and reduce the intraoperative radiation dose.This technique carries high safety and practicability,the device is simple and it can be manipulated by single physician,which is conducive to clinical application and promotion.(J Intervent Radiol,2024,33:289-294)