Improved unilateral puncture PVP based on 3D printing technology for the treatment of osteoporotic vertebral compression fracture / 中国骨伤

OBJECTIVE@#To investigate the clinical effect of unilateral percutaneous vertebroplasty (PVP) combined with 3D printing technology for the treatment of thoracolumbar osteoporotic compression fracture.@*METHODS@#A total of 77 patients with thoracolumbar osteoporotic compression fractures from October 2020 to April 2022 were included in the study, all of which were vertebral body compression fractures caused by trauma. According to different treatment methods, they were divided into experimental group and control group. Thirty-two patients used 3D printing technology to improve unilateral transpedicle puncture vertebroplasty in the experimental group, there were 5 males and 27 females, aged from 63 to 91 years old with an average of (77.59±8.75) years old. Forty-five patients were treated with traditional bilateral pedicle puncture vertebroplasty, including 7 males and 38 females, aged from 60 to 88 years old with an average of(74.89±7.37) years old. Operation time, intraoperative C-arm X-ray times, anesthetic dosage, bone cement injection amount, bone cement diffusion good and good rate, complications, vertebral height, kyphotic angle (Cobb angle), visual analogue scale(VAS), Oswestry disability index (ODI) and other indicators were recorded before and after surgery, and statistically analyzed.@*RESULTS@#All patients were followed up for 6 to 23 months, with preoperative imaging studies, confirmed for thoracolumbar osteoporosis compression fractures, two groups of patients with postoperative complications, no special two groups of patients' age, gender, body mass index (BMI), time were injured, the injured vertebral distribution had no statistical difference(P>0.05), comparable data. Two groups of patients with bone cement injection, bone cement dispersion rate, preoperative and postoperative vertebral body height, protruding after spine angle(Cobb angle), VAS, ODI had no statistical difference(P>0.05). The operative time, intraoperative fluoroscopy times and anesthetic dosage were statistically different between the two groups(P<0.05). Compared with the traditional bilateral puncture group, the modified unilateral puncture group combined with 3D printing technology had shorter operation time, fewer intraoperative fluoroscopy times and less anesthetic dosage. The height of anterior vertebral edge, kyphosis angle (Cobb angle), VAS score and ODI of the affected vertebrae were statistically different between two groups at each time point after surgery(P<0.05).@*CONCLUSION@#In the treatment of thoracolumbar osteoporotic compression fractures, 3D printing technology is used to improve unilateral puncture PVP, which is convenient and simple, less trauma, short operation time, fewer fluoroscopy times, satisfactory distribution of bone cement, vertebral height recovery and kyphotic Angle correction, and good functional improvement.

Clinical characteristics of 638 patients infected with hepatitis C virus by post blood transfusion,in Shanghai / 中华流行病学杂志

Objective To investigate me clinical-epidemiologic characteristics of patients with hepatitis C virus(HCV)infection by post blood transfusion.Methods Polymerase chain reaction (PCR)and enzynle linked immunosorbent assay(ELISA)were used to detect HCV RNA and anti.HCV,respectively.Analysis was performed on patients'age distribution,cause of primary diseases,years ofexposure,ingredient and amount of transfusion,incubation period,disorder on liver function and changes on abdominal ultrasound image,etc.Results HCV RNA levels were higher than 3.0log10 copy/ml in 90.8%infected patients、with a median as 6.10 log10 copy/ml.19.2%of the patients showed viral load 3.0 to 4.0 iog10 copy/ml,and 66.1%of them showed 5.0 to 6.0 log10 copy/ml.Only 14.7%of the infected persons had HCV RNA levels higher than 7.0 log10 copy/ml.Eighty-one point five percent(44/54)of the infected persons were confirmed as HCV RNA positive by HCV RNA qualitative analysis with HCV genotype as primarily type 1.99.8%(636/637)of the pmients were detected as anti-HCV positive by serological test.The sensitivity of serological test was higher than both quantitative and qualitative HCV RNA assays(P=0.000,P=0.000,respectively).HCV infection post blood transfusion was more seen in common people at 40 to 60 years old Most cases(85.7%)had their first exposure during 1990 to 1994.More than 10% of the cases had primary diseases aS obstetrics,orthopedics or gastrointestinal tract hemorrhage.79.9%of the patients received whole blood product transfusion.The mean interval between transfusion and clinical diagnosis was 8.5±5.5 years.90.1%of the infected patients had liver function damage,while most of them showed elevated alanine aminotransferase(ALT)no more than 5 upper limits of normal(ULN).wheteas Serum total bilirubin(TBIL).ALT and aspartate aminotransferase(AST)≥5×ULN level were showing more clinicaI manifestations(P=0.000.P=0.001,P=0.009,respectively).Abdominal ultrasound among 8.9%of the infected persons showed changes in cirrhosis,and most of them werc older than 50years of age.Conclusion Most of the post transfusion HCV infected cases happened in adulthood,and were mainly exposed during 1990 to 1994.Infected pmients usually had their liver function damaged with elevated ALT no more than 5×ULN and with medium HCV RNA levels.HCV genotype was mainly for type 1.Patients who weTe ofolder age showed higher incidence ofcirrhosis.If a patients'infection period Was longer than 5 years,he/she would show higher incidence of cirrhosis.

Multi-slice helical CT perfusion imaging in evaluating intracranial neoplasms and tumor-like lesions / 中华肿瘤杂志

<p><b>OBJECTIVE</b>To investigate the clinical value of CT perfusion in diagnosing and assessing intracranial neoplasms and tumor-like lesions.</p><p><b>METHODS</b>16-slice helical CT perfusion imaging was performed in 56 patients who were clinically suspected to have intracranial neoplasm or tumor-like lesion. With a GE-Light Speed 16-slice helical CT scanner, routine plain-CT scanning was performed to localize the central slice of the lesion. Perfusion imaging was then carried out using cine scan technique to maintain a slice thickness of 5-10 mm, a total dose of 50-70 ml of contrast-medium at an injection flow rate of 3-5 ml/s, a delay time of 7 s and a total scan time of 50 s. The images were processed using perfusion software in an ADW 4.0 workstation, meanwhile, time-density curves (TDC) of different kinds of lesions were also produced and analyzed.</p><p><b>RESULTS</b>The pathological types in this series included: 29 gliomas (12 low-grade and 17 high-grade), 2 ependemomas, 2 hemangioblastomas, 1 medulloblastoma, 2 metastatic tumors, 1 lymphoma, 5 meningiomas, 2 schwannomas, 1 germinoma, 1 teratoma in the pineal region, 6 cavernous hemangiomas, 2 inflammatory granulomas, 1 tuberculoma, and 1 hyperplasia of the choroid plexus. TDC of high-grade glioma, low-grade glioma and meningioma was different from each other. The cerebral blood flow (CBF), cerebral blood volume (CBV), particularly, the permeability surface (PS) value of glioma was found to increase significantly with the escalation of tumor differentiation grade. In PS map, margin of the tumor could be clearly showed, which was very useful when hemorrhaging within the tumor occurred. CBF in meningioma was lower than that in high-grade glioma, but there was no statistical difference in CBV, MTT and PS between these two types of tumor. The features of intracranial cavernous hemangioma such as significant prolongation of MTT, different TDCs, and zero perfused areas were diverse on CTP image, which was helpful in differentiating it from the other lesions. The germinoma and teratoma had rather low CBF and CBV value, but a remarkably high PS value, furthermore, they showed a rapid escalated TDC with a slowly and continuously elevated platform. The perfusion features of schwannoma was concordant with its pathological findings. However, no visible specific feature of inflammatory lesion was found on CTP image in this series.</p><p><b>CONCLUSION</b>Multi-slice helical CT perfusion imaging may be helpful in revealing histopathological features and hemodynamic changes as well as differential diagnosis of intracranial neoplasms and tumor-like lesions. When combined with other image and clinical information, CTP can play an important role in pre-operative diagnosis and treatment planning for intracranial neoplasms and tumor-like lesions.</p>

The rate of hepatitis B virus resistance to adefovir dipivoxil (ADV) and the evolution of hepatitis B virus in lamivudine-resistant chronic hepatitis B patients with ADV monotherapy / 中华肝脏病杂志

<p><b>OBJECTIVE</b>To study the resistant rate of hepatitis B virus (HBV) to ADV and the dynamic evolution of HBV in lamivudine (Lam)-resistant chronic hepatitis B (CHB) patients.</p><p><b>METHODS</b>Twenty-three Lam-resistant CHB patients were assigned to a 10mg/d ADV monotherapy for 68-116 weeks. The baseline and different time point blood samples after ADV monotherapy were analyzed for ADV-resistant mutations using direct sequencing of PCR products; the evolution of HBV mutations was examined by clonal analysis of serial samples from one patient infected with ADV-associated resistant HBV strains.</p><p><b>RESULTS</b>The cumulative incidence of genotypic ADV resistance at weeks 48 and 96 was 4.3% and 10.5% respectively respectively. The evolution analysis of HBV mutant strains in an ADV-resistant CHB patient showed that the proportion of YMDD mutants gradually decreased with rtA181S mutants increasing over time after ADV monotherapy, and that rtA181S+N236T mutants became the predominant strains during prolonged ADV monotherapy. The addition of Lam to the ongoing ADV treatment had poorer antiviral response in the patient with rtA181S or rtA181S+N236T mutant infection; one clone with multi-drug resistant mutations was selected during Lam and ADV combination therapy.</p><p><b>CONCLUSION</b>Increased risk of adefovir resistance and selection of multi-drug resistant mutations are associated with long-term ADV monotherapy in patients with Lam-resistant chronic hepatitis B.</p>

A clinical research on oxymatrine for the treatment of chronic hepatitis B / 中华肝脏病杂志

<p><b>OBJECTIVE</b>To investigate the clinical effect of oxymatrine on chronic viral hepatitis B and to look for new methods for treating hepatitis B.</p><p><b>METHODS</b>Multi-center, controlled study was used. In this study, 196 patients were allocated to oxymatrine, oxymatrine with Ara-AMP, IFN-a1b, and glucose groups to observe ALT, AST and viral marker changes.</p><p><b>RESULTS</b>At the end of treatment, the rate of normal ALT, the negative rate of HBV DNA and HBeAg, and the positive rate of HBeAb were similar in oxymatrine, oxymatrine with Ara-AMP, and IFN-a1b groups. It was higher than that of glucose group. After 12 months follow up, the total effective rate is 40.8%, 60.8% and 43.1% in oxymatrine, oxymatrine with Ara-AMP, and IFN-a1b groups, respectively.</p><p><b>CONCLUSIONS</b>Oxymatrine, oxymatrine with Ara-AMP, and IFN-a1b are effective to treat hepatitis B with a good negative rate of HBV DNA and HBeAg and positive rate of HBeAb.</p>