ObjectiveTo investigate the effect of neuromuscular electrical stimulation (NMES) on quadriceps muscle strength and walking for patients after anterior cruciate ligament reconstruction (ACLR). MethodsThirty-four patients after ACLR were selected at Beijing Rehabilitation Hospital of Capital Medical University from July, 2022 to October, 2023, and randomly divided into control group (n = 17) and experimental group (n = 17). Both groups received routine rehabilitation and functional training, and the experimental group received NMES during the functional training, while the control group received sham NMES, for eight weeks. Quadriceps peak torque-to-weight ratio, single-leg support phase and plantar impulses during walking were measured before and after intervention. ResultsTwo cases in the control group and three in the experimental group dropped down. Quadriceps peak torque-to-weight ratio improved in both groups after intervention (|t| > 17.578, P < 0.001), and improved more in the experimental group than in the control group (t = 4.714, P < 0.001); while the affected single-leg support phase and the affected/unaffected single-leg support phase ratio improved in both groups (|t| > 16.882, P < 0.001), and improved more in the experimental group than in the control group (t > 3.234, P < 0.01); and plantar impulses of all zones optimized in both groups (t > 9.221, P < 0.001), and were better in the experimental group than in the control group(|t| > 2.852, P < 0.01). ConclusionNMES may further improve quadriceps muscle strength, plantar pressure distribution during walking and single-leg support in patients after ACLR.

Objective:To analyze the contamination characteristics and pathogenic potential of Listeria monocytogenes (LM) in pre-packaged and refrigerated ready-to-eat cooked meat products in Chengdu City. Methods:From September 2022 to May 2023, pre-packaged and refrigerated ready-to-eat cooked meat products were collected from six districts and counties in Chengdu City. Qualitative and quantitative determination of LM was performed on these samples. Whole genome sequencing was carried out on the isolated strains. Different ST strains were selected for cell adhesion and invasion experiments. The results were expressed as adhesion rate and invasion rate. One-way ANOVA was used for comparison between groups, and the Dunnett t-test was used for pairwise comparison. Results:A total of 145 samples were collected, and LM was detected and isolated in 29 samples. The total detection rate was 20.00%, and the detection rate of braised pork was the highest (68.18%). The contamination level of LM in 9 samples (31.03%) was greater than 100.00 MPN/g. The 29 strains of Listeria monocytogenes belonged to 7 STs, including ST 3 (27.59%), ST 8 (17.24%) and ST 87 (13.79%). The strain of ST 87 carried Listeria pathogenicity islands 4 (LIPI-4), which was a highly virulent strain. The medium and high virulence strains accounted for 79.31%. Some moderately virulent and highly virulent strains of ST 8 and ST 87 were closely related to clinical patient strains. Some LM isolates of the same ST type had little SNP differences (1-6) in the same manufacturer at different stages. In vitro cell experiments showed that the highly virulent strain ST 87 had the strongest adhesion and invasion ability towards Caco-2 cells. Conclusion:The pre-packaged and refrigerated cooked meat products have a high contamination rate. Some samples have high contamination levels and carry medium and high virulence strains, posing potential health risks to human beings. LM residues continue to persist in some manufacturers′ production and processing stages.

Objective To investigate the association of bare-metal stent （BMS）， drug-coated balloon（DCB）， and plain balloon（PB） with postoperative restenosis in the treatment of vertebral artery origin stenosis （VAOS）. Methods The patients with symptomatic VAOS who underwent revascularization in our center were enrolled and divided into BMS group， DCB group， and PB group according to their treatment modality. The primary outcome was 12-month restenosis rate （≥50% stenosis）， and secondary outcomes included postoperative residual stenosis rate， 3- and 6-month restenosis rates， and 3-month good functional outcome （modified Rankin Scale score ≤1）. The binary logistic regression analysis was used to assess the effect of different treatment modalities on outcome. Results The 12-month restenosis rate was 29.3% in the BMS group， 24.4% in the DCB group， and 42.9% in the PB group， with no significant difference between the three groups（P=0.234）. There was a significant difference in the distribution of postoperative residual stenosis between groups （P<0.001），and the BMS group had a significantly higher non-residual stenosis rate than the DCB group and the PB group （95.9% vs 37.8%/14.3%）. There was no significant difference in 3-month restenosis rate between the BMS group and the DCB group （7.5% vs 17.8%， P=0.129）， and the PB group had a 3-month restenosis rate of 39.3%， which was significantly higher than that in the other two groups （both P<0.05）. There was no significant difference in 6-month restenosis rate between the BMS group and the DCB group （8.2% vs 17.8%， P=0.158）， and the PB group had a 6-month restenosis rate of 39.3%， which was significantly higher than that in the other two groups （both P<0.05）. The good clinical outcome rate at 3 months was 66.7% in the BMS group， 77.8% in the DCB group， and 64.3% in the PB group， with no significant difference between groups （P=0.323）. Conclusion There is no significant difference in 12-month restenosis rate between the three treatment modalities for VAOS， and compared with PB， both BMS and DCB can reduce restenosis rate in patients with VAOS in the short term. BMS has significant clinical advantages in restoration of vascular lumen immediately after surgery.
Stents

Objective To explore the safety and feasibility of mechanical thrombectomy as the first-line endovascular strategy in patients with non-acute symptomatic long-segment internal carotid artery occlusion(ICAO)undergoing revascularization.Methods This study retrospectively and consecutively enrolled non-acute symptomatic long-segment ICAO patients treated in the Department of Neurology,First Hospital of Jilin University,between January 2019 and August 2023,with mechanical thrombectomy as the preferred endovascular modality.Baseline and clinical data were collected,including sex,age,stroke-related risk factors(hypertension,diabetes,dyslipidemia,coronary artery disease,prior stroke,smoking and alcohol use history),admission National Institutes of Health stroke scale(NIHSS)score,pre-operative modified Rankin scale(mRS)score,time from last symptom onset to femoral puncture,time from imaging confirmation to femoral puncture,high-resolution MRI,right-sided ICAO,stump morphology(absent,tapered,flat/blunt,irregular),distal backfilling patterns(above ophthalmic segment,cavernous/clinoid segment,below cavernous segment),pathogenesis(atherosclerosis,dissection),types of anesthesia(local,general),procedure time(time frame from femoral puncture to recanalization or final angiography),site of the original occlusion in successfully recanalized cases,surgical techniques(aspiration+balloon angioplasty,aspiration+balloon angioplasty+stent-retriever thrombectomy,aspiration+balloon angioplasty+stent placement,aspiration+balloon angioplasty+stent-retriever thrombectomy+stent placement),stent placement(yes/no),number of stents implanted,and number of cases with retrieved thrombus,observed indicators.Observed indicators including ratio of technical successful recanalization(immediately post-procedure most severely stenosed site stenosis rate＜50%,expanded thrombolysis in cerebral infarction[eTICI]grade≥2c),intraoperative complications(distal embolization,symptomatic intracranial hemorrhage,arterial perforation)rate,perioperative mortality rate,30-day stroke recurrence,and 90-day mRS score.Compare the baseline data,clinical data and observational indicators of the patients with successful and unsuccessful recanalization.Base on the original occlusion site,successfully recanalized patients were subclassified into isolated extracranial,isolated intracranial,and tandem lesions patients,and their baseline characteristics and observation indicators were compared.Results(1)A total of 65 patients were enrolled(57 men,8 women;age 39-80 years;median 59[52,65]years)in this study.Technical success was achieved in 52cases(80%).Perioperative complications occurred in 4 patients(6.2%),with 3 distal embolization cases(4.6%),1(1.5%)developed symptomatic intracranial hemorrhage,and no arterial perforations were observed.There was no perioperative mortality.The 30-day stroke recurrence rate was 7.7%(5/65).90-day mRS scores ranged from 0 to 4,with a median of 1.0(0.0,1.5).(2)Baseline and clinical characteristics as well as outcome indicators did not differ significantly between patients with successful versus unsuccessful recanalization in the cohort undergoing mechanical thrombectomy for non-acute symptomatic long-segment intracranial carotid artery occlusion(all P＞0.05).(3)Among successfully recanalized patients,17(32.7%)had isolated extracranial lesions,18(34.6%)had isolated intracranial lesions,and 17(32.7%)had tandem lesions.All cases in the extracranial lesions group had original lesion site at the origin of internal carotid artery(C1,17/17).The intracranial group most often had orginal lesion sites at the C4 segment(9/18),whereas tandem lesions predominantly involved C1 plus C4-C5(16/17).Among the three groups,patients with isolated intracranial lesions were younger(57[48,61]years vs.60[52,64],63[58,69]years,P=0.050),and had a lower proportion of right-sided ICAO(4/18 vs.11/17 vs.11/17,P=0.032),while patients with tandem lesions required a greater number of stents(2.0[1.0,2.0]vs.1.0[1.0,1.5],1.0[0.8,2.0],P=0.013).Significant differences were observed in the proportion of patients with retrieved thrombus decreased progressively from patients with isolated extracranial,isolated intracranial to tandem lesions(17/17 vs.17/18 vs.12/17,P=0.024).No significant differences were observed among lesion-site groups with respect to medical history,stump morphology,distal retrograde flow,procedural technique,procedure duration,anesthesia method,or outcome indicators(all P＞0.05).Conclusions This study suggested that utilizing mechanical thrombectomy as the first-line endovascular therapy for non-acute symptomatic long-segment ICAO is safe and feasible.The original occlusive sites of non-acute symptomatic long-segment ICAO predominantly involve the cervical origin and the cavernous segment of the internal carotid artery.The conclusions of this study require further validation.

Objective To explore the safety and feasibility of mechanical thrombectomy as the first-line endovascular strategy in patients with non-acute symptomatic long-segment internal carotid artery occlusion(ICAO)undergoing revascularization.Methods This study retrospectively and consecutively enrolled non-acute symptomatic long-segment ICAO patients treated in the Department of Neurology,First Hospital of Jilin University,between January 2019 and August 2023,with mechanical thrombectomy as the preferred endovascular modality.Baseline and clinical data were collected,including sex,age,stroke-related risk factors(hypertension,diabetes,dyslipidemia,coronary artery disease,prior stroke,smoking and alcohol use history),admission National Institutes of Health stroke scale(NIHSS)score,pre-operative modified Rankin scale(mRS)score,time from last symptom onset to femoral puncture,time from imaging confirmation to femoral puncture,high-resolution MRI,right-sided ICAO,stump morphology(absent,tapered,flat/blunt,irregular),distal backfilling patterns(above ophthalmic segment,cavernous/clinoid segment,below cavernous segment),pathogenesis(atherosclerosis,dissection),types of anesthesia(local,general),procedure time(time frame from femoral puncture to recanalization or final angiography),site of the original occlusion in successfully recanalized cases,surgical techniques(aspiration+balloon angioplasty,aspiration+balloon angioplasty+stent-retriever thrombectomy,aspiration+balloon angioplasty+stent placement,aspiration+balloon angioplasty+stent-retriever thrombectomy+stent placement),stent placement(yes/no),number of stents implanted,and number of cases with retrieved thrombus,observed indicators.Observed indicators including ratio of technical successful recanalization(immediately post-procedure most severely stenosed site stenosis rate＜50%,expanded thrombolysis in cerebral infarction[eTICI]grade≥2c),intraoperative complications(distal embolization,symptomatic intracranial hemorrhage,arterial perforation)rate,perioperative mortality rate,30-day stroke recurrence,and 90-day mRS score.Compare the baseline data,clinical data and observational indicators of the patients with successful and unsuccessful recanalization.Base on the original occlusion site,successfully recanalized patients were subclassified into isolated extracranial,isolated intracranial,and tandem lesions patients,and their baseline characteristics and observation indicators were compared.Results(1)A total of 65 patients were enrolled(57 men,8 women;age 39-80 years;median 59[52,65]years)in this study.Technical success was achieved in 52cases(80%).Perioperative complications occurred in 4 patients(6.2%),with 3 distal embolization cases(4.6%),1(1.5%)developed symptomatic intracranial hemorrhage,and no arterial perforations were observed.There was no perioperative mortality.The 30-day stroke recurrence rate was 7.7%(5/65).90-day mRS scores ranged from 0 to 4,with a median of 1.0(0.0,1.5).(2)Baseline and clinical characteristics as well as outcome indicators did not differ significantly between patients with successful versus unsuccessful recanalization in the cohort undergoing mechanical thrombectomy for non-acute symptomatic long-segment intracranial carotid artery occlusion(all P＞0.05).(3)Among successfully recanalized patients,17(32.7%)had isolated extracranial lesions,18(34.6%)had isolated intracranial lesions,and 17(32.7%)had tandem lesions.All cases in the extracranial lesions group had original lesion site at the origin of internal carotid artery(C1,17/17).The intracranial group most often had orginal lesion sites at the C4 segment(9/18),whereas tandem lesions predominantly involved C1 plus C4-C5(16/17).Among the three groups,patients with isolated intracranial lesions were younger(57[48,61]years vs.60[52,64],63[58,69]years,P=0.050),and had a lower proportion of right-sided ICAO(4/18 vs.11/17 vs.11/17,P=0.032),while patients with tandem lesions required a greater number of stents(2.0[1.0,2.0]vs.1.0[1.0,1.5],1.0[0.8,2.0],P=0.013).Significant differences were observed in the proportion of patients with retrieved thrombus decreased progressively from patients with isolated extracranial,isolated intracranial to tandem lesions(17/17 vs.17/18 vs.12/17,P=0.024).No significant differences were observed among lesion-site groups with respect to medical history,stump morphology,distal retrograde flow,procedural technique,procedure duration,anesthesia method,or outcome indicators(all P＞0.05).Conclusions This study suggested that utilizing mechanical thrombectomy as the first-line endovascular therapy for non-acute symptomatic long-segment ICAO is safe and feasible.The original occlusive sites of non-acute symptomatic long-segment ICAO predominantly involve the cervical origin and the cavernous segment of the internal carotid artery.The conclusions of this study require further validation.

Objective:To analyze the contamination characteristics and pathogenic potential of Listeria monocytogenes (LM) in pre-packaged and refrigerated ready-to-eat cooked meat products in Chengdu City. Methods:From September 2022 to May 2023, pre-packaged and refrigerated ready-to-eat cooked meat products were collected from six districts and counties in Chengdu City. Qualitative and quantitative determination of LM was performed on these samples. Whole genome sequencing was carried out on the isolated strains. Different ST strains were selected for cell adhesion and invasion experiments. The results were expressed as adhesion rate and invasion rate. One-way ANOVA was used for comparison between groups, and the Dunnett t-test was used for pairwise comparison. Results:A total of 145 samples were collected, and LM was detected and isolated in 29 samples. The total detection rate was 20.00%, and the detection rate of braised pork was the highest (68.18%). The contamination level of LM in 9 samples (31.03%) was greater than 100.00 MPN/g. The 29 strains of Listeria monocytogenes belonged to 7 STs, including ST 3 (27.59%), ST 8 (17.24%) and ST 87 (13.79%). The strain of ST 87 carried Listeria pathogenicity islands 4 (LIPI-4), which was a highly virulent strain. The medium and high virulence strains accounted for 79.31%. Some moderately virulent and highly virulent strains of ST 8 and ST 87 were closely related to clinical patient strains. Some LM isolates of the same ST type had little SNP differences (1-6) in the same manufacturer at different stages. In vitro cell experiments showed that the highly virulent strain ST 87 had the strongest adhesion and invasion ability towards Caco-2 cells. Conclusion:The pre-packaged and refrigerated cooked meat products have a high contamination rate. Some samples have high contamination levels and carry medium and high virulence strains, posing potential health risks to human beings. LM residues continue to persist in some manufacturers′ production and processing stages.

A method of ultra performance liquid chromatography-quadrupole-time of flight-mass spectrometry ( UPLC-Q-TOF MS) was developed to determine 35 kinds of illegally added chemical fungicides in pesticide formulations. The samples were pretreated based on the ultrasonic extraction by the solvent of methanol, and then separated on a Zorbax C18(100 mm×1. 8 mm, 2. 1 μm) column by a gradient elution with 0. 1% formic acid aqueous solution and acetonitrile as the mobile phase. The mass spectrometer was operated under positive mode. Under the optimal conditions, the recoveries at three spiked levels (0. 2, 0. 4, and 2. 0 mg/kg) were in the range of 81. 0%-101. 3% and the RSDs were 1. 0%-4. 4%. Based on the developed method, 100 samples were analyzed, and among which 6 samples were screened out chemical fungicides. The proposed method was high-efficient, accurate and reliable for the qualitatively screening of illegaly added chemical fungicides.