Objective To discuss the clinical application of drainage for lung abscess by needle puncture under CT guidance. Methods 18 cases of lung abscess were drainaged by needle puncture under CT guidance, including direct aspiration by puncture needle 1-3 times (n=8) and retaining drainage tube continuously (n=10). Results 17 cases with this procedure were succeeded possessing success rate of 94.7%(17/18). The patients were followed up for 11-35 days with symptom relieving better obviously and the focus shrinkage or disappeared (n=16), the curative rate reached 88.9%(16/18). The main complication was pneumothorax with capacities of %(n=1).Conclusions The curative course of lung abscess can be shortened greatly by percutaneous needling drainage under CT guidance with mild trauma. The procedure is simple with high successful rate and less complication.

Objective To improve the diagnosing level of lunate and perilunate dislocation through analysing X-ray finding and causes of missing diagnosis.Methods 16 cases of lunate and perilunate dislocation missed diagnosis were analysed.Results In 16 cases,there were 3 cases of ventral lunate dislocation,2 cases of trans-scaphoid ventral lunate dislocation,6 cases of dorsal perilunate lunate dislocation,3 cases of trans-scaphoid dorsal perilunate lunate dislocation and 2 cases of atypical dorsal perilunate lunate dislocation.6 cases were missed in diagnosis(37.5%).Conclusion Knowing well the normal X-ray sign of wrist,mastering the X-ray characteristic of each types of dislocation and fracture,is the linchpin of reducing missing diagnosis.

Objective: To develop a magnetic solid-phase extraction combined with gas chromatography-tandem mass spectrometry (GC-MS/MS) based on pyrrole-modified magnetic nanoparticles to determine 16 types of phthalic acid esters (PAEs) in commercial liquors. Methods : Fe3O4 magnetic nuclei were prepared by hydrothermal synthesis, and the polypyrrole-modified magnetic nanomaterials were prepared with the chemical oxidation method. Magnetic solid-phase extraction of beer, grape wine, rice wine and Chinese spirits was performed at 10% alcohol by volume, extraction duration of 20 min and ethyl acetate elution of 10 min, followed by addition of 1 g NaCl for reduction of emulsification effect. The 16 types of PAEs were determined using GC-MS/MS with DB-5MS capillary column (30 m×250 μm, 0.25 μm) under the mode of electron impact ionization (EI) and dynamic multiple reaction monitoring (dMRM), with quantitative analysis using the external standard method. The standard curve, detection limit, spike recovery rate and precision of GC-MS/MS for determination of 16 types of PAEs were evaluated. Results: Pyrrole was successfully embedded onto the surface of magnetic nanoparticles in the form of polymer, and the magnetic nanoparticles modified by polypyrrole were well characterized, showing unapparent matrix and emulsification effects. There was a good linear relationship for the 16 types of PAEs at 50 to 5 000 ng/mL (r=0.999 5-0.999 9), and the spike recovery rate of 16 types of PAEs ranged from 71.61% to 110.50% at 100, 500 and 1 000 μg/kg, with relative standard deviations of 3.78% to 7.41%, detection limits of 0.02 to 1.47 μg/kg. PAEs were detected in 20 out of 50 liquor samples, with 30.00%, 60.00%, 40.00% and 70.00% detection rates in beer, grape wine, rice wine and Chinese spirits, respectively. Conclusions This method is sensitive to determine 16 types of PAEs in liquor samples, with unapparent matrix and emulsification effects, and the polypyrrole-modified magnetic composite nanoparticles present high adsorption of PAEs in liquor samples, which is feasible for monitoring of PAEs in multiple types of liquor samples.

Bioactive glasses (BGs) are a kind of biomaterials with osteoconductive and osteoinductive properties and are able to create a strong bond with host bone and promote osteogenesis after implantation. According to their compositions, bioactive glasses can be classified as silicate BGs, phosphate BGs, and borate BGs. Nowadays, silicate BGs are still the most common, while phosphate BGs and borate BGs have higher dissolution and degradation rates. Melt?quenching and sol?gel process are two basic methods to produce melt?derived BGs and sol?gel BGs, respectively. The latter requires lower heat treatment temperature with higher specific surface area and biological activity. Bioactive glass?ceramics can be obtained by heat treatment, which improves the mechanical strength but slightly reduces the bioactivity. Nano?bioactive glasses with the higher specific surface area can be ob?tained by changing the structure size of the materials by other treatment methods. On this basis, 3D BGs scaffolds can be made, and hybrid BGs scaffolds as well by combining with other biomaterials to obtain the 3D interconnected pores with the hierarchical or bionic structures, to enhance the mechanical strength, osteogenic activity and provide mechanical support suitable for the host bone. However, the bioactivity of BGs depends on the degradation rate, to some extent, which is contradictory to the mechanical strength. An appropriate porosity or controllable degradation rate can be selected to meet the common needs of early support and osteogenesis. In basic studies, it was found that BGs could act on cells by releasing ions or through the macropinocytosis pathway, up?regulating the expression of related genes or promoting osteogenesis. The degradation rates of BGs are related to their struc?tures and compositions, which enables the quantitative prediction of the change of mechanical strength during degradation. Prog?ress has also been made in structural mechanics and testing methods.

Objective To identify prognostic factors ofmotorfunctionafter surgery of metastatic spinal cord compression (MSCC).Methods The clinical data of 681 patients with spinal metastases from January 2008 to December 2017 were retrospectively analyzed.According to inclusion and exclusion criteria,a total of 206 patients with spinal metastatic were included.Postoperative neurological function was assessed using Frankel classification.The influence of age,gender,preoperative status,number of spine metastases,location of spinal metastases,visceral metastases,bone metastases,primary tumor type,interval from symptom to surgery,time of developing motor deficits,interval from primary tumor diagnosis to MSCC,preoperativethe Eastern Cooperative Oncology Group performance status (ECOG-PS),Karnofsky Performance score (KPS) and surgical procedures on postoperative function outcomes were explored.Results 140 (68.0％) patients were able to walk postoperatively compared with 88 (42.7％) patients preoperatively.Moreover,in 89.8％ of all patients,79 ambulatory patients maintained ambulation after treatment.The univariate analysis according to Ordered-logit model showed thatnumber of spine metastases,location of spinal metastases,preoperative ECOG-PS,preoperative KPS,interval from symptom to surgery and time of developing motor deficits were related with posttreatment motor functions.The multivariable analysis showed that number of spine metastases (OR=2.03;95％CI:1.12-3.33;P=0.04),preoperative ECOG-PS (OR=4.84;95％CI:2.42-8.15;P=0.038),interval from symptom to surgery (OR=3.78;95％CI:3.12-9.15;P=0.024),time of developing motor deficits(OR=2.75;95％CI:1.22-3.89;P=0.01) were independent prognostic factors for function outcomes.Conclusion 1-2 levels of metastasis,Interval from symptom to treatment ≥ 48 h,time of developing motor deficits ≥7 d,and ECOG-PS 1-2 can be considered as the most significant positive prognosticfactors for post-treatment ambulatory status.Spinal metastasis should have a higher priority,and immediate intervention should be started before the development of irreversible neurologic deficits.Increasing awareness of early symptoms and earlier screeningwith regular outpatient review might make a difference for patients with MSCC.Consequently,the identified prognostic factors can be considered as apreoperative assessment tool to predict the neurologic outcomeand guide clinical treatment for individual patients with MSCC.