Objective To investigate the preliminary experience of mechanical thrombectomy with a tri-axial system of the Solitaire AB stent through a Neuro delivery catheter to treat intracranial large artery occlusion. Methods A tri-axial system was used to deliver the Solitaire AB stent through a Neuro delivery catheter to provide intracranial aspiration in close proximity to the stent. This technique was used in 1 case of acute middle cerebral artery occlusion and 1 case of acute basilar artery occlusion. Results Successful revascularization was achieved in these 2 cases. Thrombolysis in cerebral infarction (TICI)score was 3. The clot length of acute middle cerebral artery occlusion was 3 cm and the modified Rankin Scale (mRS)score of this case was 3 at 90 days follow-up. Another patient with acute bilateral vertebral occlusion was revealed successful recanalization by angiography. Conclusion The results suggest that this technique of a tri-axial system used of the Solitaire stent through a Neuro delivery catheter can effectively retrieve clots from the occlusive artery and minimize the chance of antegrade blood flow dislodging the thrombus.

Objective To evaluate the feasibility and curative effect of extracorporeal liver perfusion (ECLP) in treatment of acute liver failure (ALF) in pigs. Methods The experiments were carried out in healthy pigs (weight 20-30 kg) under general anesthesia. All of the pigs were randomly divided into 3 groups. ALF model was established by liver blood supply obstructing and portal-systemic shunting. ALF group (n=5): ALF pigs were killed 8 h after establishing. ALF+ECLP group (n=5): ALF pigs were perfused with ECLP for 4 h and killed 8 h after establishing. Normal liver+ECLP group (n=4): normal pigs were dealt with just as ALF+ECLP group. The data of PT, AST, TNF, blood ammonia were collected in all groups. Pathologic changes in liver and brain were detected. Results The levels of PT, AST, TNF, blood ammonia, RBC and HCT in the ALF+ECLP group were lower than those in the ALF group (P

Objective To investigate the effect of hyperglycemia at admission in patients with acute ischemic stroke on endovascular treatment outcome.Methods From May 2012 to December 2016,200 consecutive patients with acute ischemic stroke (excluding patients with diabetes mellitus) underwent endovascular mechanical thrombectomy at the Department of Neurosurgery,the First People's Hospital of Changzhou were enrolled retrospectively.They were divided into either a hyperglycemia group (hyperglycemia was defined as glucose ＞7.8 nmol/L at admission,n =57) or a non-hyperglycemia group (n =143) according to the blood glucose levels at admission.The neurological function of the patients was evaluated by the National Institutes of Health Stroke Scale (NIHSS) at admission and discharge.The modified thrombolysis in cerebral infarction (mTICI) grade was used to evaluate the degree of recanalization.The modified Rankin scale (mRS) was used to evaluate the prognosis of the patients at 90 d after procedure.The general information of the patients were analyzed,including sex,age,past history,hospitalization time,onset to recanalization time (ORT),TOAST classification of cerebral infarction,and recanalization.The endovascular treatment outcomes of both groups were compared.Results (1) There were no significant differences in TOAST classification,age,hypertension history,atrial fibrillation history,stroke history,coronary heart disease history,ORT,NIHSS at admission between the patients of the two groups (all P ＞ 0.05).(2) There were no significant differences in days of hospitalization,mTICI grade,and number of thrombectomy between the patients of the two groups (P ＞0.05).(3) The discharge mortality and incidence of in-hospital neurological deterioration in the patients of the hyperglycemia group were 28.1％ (16/57) and 31.6％ (18/57) respectively,while those in the non-hyperglycemia group were 14.7％ (21/143) and 18.2％ (26/143) respectively.There were significant differences between the two groups (P =0.028 and 0.039 respectively).Conclusion Hyperglycemia at admission may have adverse effects on the prognosis in patients after receiving mechanical thrombectomy.

Objective:To explore the value of quantitative susceptibility mapping (QSM) in evaluating renal injury in patients with early diabetic nephropathy (DN).Methods:From October 2019 to December 2020, 32 patients with early DN were prospectively enrolled in the Third Affiliated Hospital of Soochow University. According to the estimated glomerular filtration rate (eGFR), they were divided into three groups: DN1 (eGFR≥90 ml·min -1·1.73 m -2, 11 cases), DN2 (60-<90 ml·min -1·1.73 m -2, 11 cases) and DN3 (30-<60 ml·min -1·1.73 m -2, 10 cases). At the same time, 32 normal volunteers were recruited as the control group. Both kidneys were scanned by QSM to measure the susceptibility of renal cortex and medulla. Paired samples t-test was used to compare the differences of the susceptibility between left and right kidneys and between cortex and medulla. One-way analysis of variance was performed to compare the differences of corresponding susceptibility values among different groups, and LSD- t was used for the pairwise comparison. Pearson correlation test was performed between the susceptibility value of the medulla and eGFR. The ROC curve was used to analyze the diagnostic efficacy of QSM parameters in the diagnosis of DN and different degrees of severity of DN. Results:The susceptibility values of bilateral renal medulla in normal volunteers and patients with DN were lower than those of renal cortex (all P<0.001). There was no significant difference in the susceptibility value between left and right renal cortex (all P>0.05). There was significant difference in the susceptibility value between left and right medulla (all P<0.05). There was no significant difference in the susceptibility value of bilateral renal cortex among the control group and the DN1－DN3 groups (both P>0.05). The susceptibility values of left renal medulla in control group, DN1, DN2 and DN3 groups were (-4.46±1.16)×10 -2, (-5.96±0.97)×10 -2, (-7.97±1.25)×10 -2, (-9.58±1.45)×10 -2 ppm, of right renal medulla were (-3.70±0.65)×10 -2, (-5.06±1.28)×10 -2, (-7.33±1.46)×10 -2, (-9.09±2.22)×10 -2 ppm, respectively. The overall difference of the susceptibility value of bilateral renal medulla was statistically significant (both P<0.05), and there were significant differences between each two groups (all P<0.05). The linear positive correlation were found between the susceptibility values of renal medulla and the corresponding eGFR (left kidney r=0.732, P<0.001; right kidney r=0.684, P<0.001). The areas under the ROC curve (AUC) of left and right renal medulla susceptibility value in diagnosis of normal and DN were 0.931 and 0.943, of DN1 and DN (2 and 3) were 0.952 and 0.883, of DN (1 and 2) and DN3 were 0.888 and 0.831, respectively. Conclusion:The susceptibility value of QSM quantitative parameter has a certain value in the staging and differential diagnosis of early DN, among which the susceptibility value of renal medulla has higher diagnostic efficiency.

Objective To investigate the efficacy of endovascular treatment (EVT) in acute cardioembolic large vessel occlusion (LVO) of anterior circulation and its influencing factors.Methods The clinical data of 83 patients with acute cardioembolic LVO of anterior circulation treated with EVT during June 2014 to June 2016 were analyzed retrospectively.The neurological outcomes in these patients were evaluated by National Institutes of Health Stroke Scale (NIHSS) on admission;cerebral vascular re-canalization after procedure was classified according to thrombolysis in cerebral infarction (TICI) grading;the recovery of neurological outcomes was classified by modified Rankin scale (mRS) at discharge.According to the mRS scores at discharge,these patients were divided into two groups:good curative effect group and poor curative effect group.Single factor analysis was performed on all clinical parameters that might influence the surgical outcomes;in addition,the influencing factors of surgical outcomes were analyzed by multiple factor Logistic regression analysis.Results Eighty-one patients (97.59％) had good re-canalization (TICI grading 2b-3) after EVT;41 patients (49.40％) had better curative effect (mRS scores ≤3 at discharge),and 42 patients (50.60％) had poor curative effect (mRS scores ≥4 at discharge);postoperative hemorrhagic transformation appeared in 26 patients,and 16 patients (19.28％) accepted decompressive craniectomy resulting from massive cerebral infarction,severe encephaledema or hemorrhagic transformation,and had poor curative effect.The single factor analysis showed that the differences of NIHSS scores on admission,occlusion site,angiographic re-canalization,time from the symptom onset to the vessel re-canalization and whether hemorrhagic transformation after operation between the good curative effect group and poor curative effect group were statistically significant (P＜0.05);multiple factor Logistic regression analysis showed that NIHSS scores on admission,angiographic re-canalization,time from the symptom onset to the vessel re-canalization and whether hemorrhagic transformation after procedure were significantly correlated to the treatment efficacy (OR=1.171,95％CI:1.028-1.333,P=0.017;OR=3.623,95％CI:0.931-14.095,P=0.063;OR=l.012,95％ CI:1.003-1.021,P=0.008;OR=3.146,95％CI:0.875-11.309,P=0.079).Conclusions Endovascular thrombectomy is an effective approach for cardioembolic acute anterior circulation stroke.Furthermore,the influential factors of surgical treatment are NIHSS scores on admission,angiographic re-canalization,time from the symptom onset to the vessel re-canalization and whether hemorrhagic transformation after procedure.

Objective To explore the efficacy and safety of low-dose tirofiban in stent-assisted coil embolization(SAC)for ruptured intracranial aneurysms.Methods From April 2011 to September 2020,335 patients of ruptured intracranial aneurysms with subarachnoid hemorrhage(SAH)admitted in the First People's Hospital of Changzhou were retrospectively analyzed.All cases underwent stent-assisted coil embolization within 24-48 h and antiplatelet medications.The patients were divided into dual antibody group(89 cases)and tirofiban group(246 cases).Baseline and clinical data of all patients were collected for comparison between groups,including age,sex,hypertension,diabetes mellitus,Hunt-Hess grade at admission,modified Fisher scale score at admission,aneurysm diameter(＞5 mm,≤5 mm),aneurysm location(anterior circulation,posterior circulation),postoperative acute hydrocephalus or intraventricular hemorrhage,postoperative complete embolization rate of ruptured aneurysm.All patients with ruptured intracranial aneurysm with SAH were confirmed by emergency cerebral CT scan after admission.The Raymond grading criteria were used to evaluate the embolization effect after operation:grade Ⅰ refers to no development(complete embolization),grade Ⅱ refers to only aneurysm neck development(incomplete embolization),and grade Ⅲ refers to aneurysm body development,in which Raymond grading Ⅰ orⅡ indicates effective embolization.Tirofiban group:4.2 μg/kg tirofiban was intravenously injected after the coil was placed in the aneurysm lumen and the stent was released,followed by maintenance dose 0.07 μg/(kg·min)for 6-8 h,and aspirin 100 mg and clopidogrel 75 mg were given as sequential dual antiplatelet therapy 2 hours before the tirofiban infusion was stopped.Dual antiplatelet group:a loading dose of aspirin 300 mg and clopidogrel 300 mg was given at least 2 hours before stent implantation,and then transferred to aspirin 100 mg and clopidogrel 75 mg given on the second day after operation.All patients received aspirin(100mg/d)for 6 months and clopidogrel(75 mg/d)for 3 months after operation.The efficacy indicators,safety indicators,adverse events and other complications of the two groups were collected and compared.The efficacy indicators were the incidence of thrombotic events during operation and within 72 hours after operation.The safety indicators were the incidence of intraoperative and early postoperative intracranial hemorrhage(within 48 hours after operation),the incidence of late postoperative intracranial hemorrhage(over 48 hours after operation),and the incidence of intracranial hemorrhage related to external ventricular drainage(symptomatic and asymptomatic).The adverse event was the occurrence of drug-related thrombocytopenia.Other complications were delayed ischemic events.The modified Rankin scale(mRS)score was used to evaluate the clinical prognosis of patients at 180 days after operation.mRS score ≤2 was defined as good prognosis,mRS score＞2 was defined as poor prognosis,of which 6 was defined as death.Results(1)There were no significant differences in baseline and clinical data between the tirofiban group and the dual antibody group(all P＞0.05).(2)There was no significant difference in the proportion of patients with good outcome(75.2％[185/246]vs.74.2％[66/89],P=0.845)and death(10.2％[25/246]vs.12.4％[11/89],P=0.566)at 180 days after operation between the tirofiban group and the dual antiplatelet group.(3)There was no significant difference in the incidence of intraoperative(0.8％[2/246]vs.4.5％[4/89],P=0.075)and postoperative thrombotic events(11.0％[27/246]vs.13.5％[12/89],P=0.527)between the tirofiban group and the dual antiplatelet group.(4)Results about safety comparison between this two antiplatelet regimens showed that the incidence of early postoperative intracranial hemorrhage were lower in the tirofiban group than that in the dual antiplatelet group(2.8％[7/246]vs.10.1％[9/89],P=0.014).There were no significant differences in the symptomatic external ventricular drainage related intracranial hemorrhage(0 vs.2/15,P=0.050),incidences of intraoperative intracranial hemorrhage(1.6％vs.3.4％,P=0.580),late postoperative intracranial hemorrhage(3.3％vs.4.5％,P=0.836),and drug-related thrombocytopenia(0.4％vs.1.1％,P=0.461)between the two groups.Conclusion Low-dose tirofiban infusion in SAC for ruptured aneurysms may prevent perioperative thromboembolic events without high risk of intracranial hemorrhage.