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Objective To study the application value of 3.0T MRI T2 mapping quantitative technology in the diagnosis of anterior cruciate ligament sprain and chronic injury of knee joint.Methods A total of 82 subjects were studied,and the experimental group 72 cases was divided into grade Ⅰ injury group(25 cases),grade Ⅱ injury group(25 cases),chronic injury group(22 cases),and control group 10 cases.The experimental group met the criteria of arthroscopy.The proximal,middle,and distal segments of the anterior cruciate ligament were selected as the region of interest(ROI),and T2 mapping values were measured.The differences in T2 mapping values of each area were compared between and within the groups,while compared with arthroscopy.Results The T2 mapping values in grade Ⅰ,Ⅱ,and chronic injury groups were higher than those in control group(P<0.05).Comparison within the experimental group:the T2 mapping values of each area in grade Ⅱ injury group were higher than those in grade Ⅰ injury group and chronic injury group(P<0.05).The T2 mapping values of each area in grade Ⅰ injury group were higher than those in chronic injury group(P<0.05).The specificity,sensitivity,positive predictive value,negative predictive value and accuracy of T2 mapping in diagnosing anterior cruciate ligament grade Ⅰ injury were 94.7%,95.5%,89.7%,96.6%,and 90.2%respectively.The specificity,sensitivity,positive predictive value,negative predictive value,and accuracy of grade Ⅱ injury were 89.4%,87.9%,92.1%,93.4%,and 93.8%respectively.The specificity,sensitivity,positive predictive value,negative predictive value,and accuracy of chronic injury were 92.2%,95.4%,90.3%,87.6%,and 91.5%respectively.Kappa test showed a good con-sistency between T2 mapping results and arthroscopic results,with a Kappa value of 0.763(P<0.01).Conclusion The value of MRI T2 mapping can provide a reference for the clinical diagnosis of anterior cruciate ligament sprain and chronic injury of knee joint,and the results are in good agreement with the control of arthroscopy.
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Objective To quantitatively study the pathological characteristics of the joint disc in the early stage of temporomandibular joint dysfunction based on 3.0T MR T2 mapping technology.Methods There were 90 patients in the study,including 30 in the control group and 60 in the experimental group.All patients were clinically diagnosed with early temporomandibular joint dysfunction.The 90 patients underwent conventional 3.0T MR and T2 mapping scanning in open and closed mouth positions,the T2 mapping pseudo-color images of the temporomandibular joint disc was observed,and the T2 mapping values at the anterior extension,anterior,middle,posterior bands of the temporomandibular joint disc,as well as the upper and lower plates of the double plate area were quantitatively measured.The T2 mapping values of the above sites were compared between and within the two groups.Results The T2 mapping values in the anterior extension,anterior band,middle band,posterior band,upper plate and lower plate of the bilateral temporomandibular joint disc in the open and closed positions of the experimental group were significantly higher than those in the control group(P＜0.05).The T2 mapping values in the open and closed positions of the experimental group were higher than those in other areas(P＜0.05).There was no significant difference in T2 mapping values between the control group and the experimental group in the observation areas of the bilateral tem-poromandibular joint disc at the open and closed positions(P＞0.05).Conclusion The 3.0T MR T2 mapping can be used to quantitatively assess the joint disc injury of temporomandibular joint dysfunction in the early stage,and the value of T2 mapping in the middle band of the disc in the experimental group is higher than that in other observation areas.
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Objective To evaluate the clinical efficacy of video-assisted thoracoscopic lobectomy in the treatment of primary lung cancer in elderly patients.Methods Clinical data of 50 elderly patients with primary non-small cell lung cancer undergoing lobectomy at our hospital from July 2016 to July 2017 were retrospectively analyzed.The patients were divided into video-assisted thoracoscopic surgery(VATS) group(n =30) and conventional thoracotomy group (n =20).General data of surgery including operating time,intraoperative bleeding volume,the total volume of intraoperative drainage,the group number of lymph node dissection and the number of dissected lymph nodes,and postoperative data including duration of chest tube drainage,the first 24 h post-operative pain numeric rating scale(NRS)score,postoperative hospitalization time and 30-day postoperative complication were analyzed and compared between the two groups.Results All operations were successfully completed in all patients of both groups,and no patient died during the perioperative period.The differences were statistically significant between VATS and traditional thoracotomy groups in operating time[(96.8 ± 10.2)min vs.(126.3±16.1)min,t =6.211,P=0.036],in transoperative bleeding[(101.3±12.7)ml vs.(128.3±14.6)ml,t =4.310,P =0.027]and in total volume of intraoperative draining[(231.7±31.6)ml vs.(295.6 ± 39.8) ml,t =5.610,P =0.018].VATS showed superiority over traditional thoracotomy.In VATS groups vs.the traditional thoracotomy group,the duration of chest tube drainage was[(3.0±0.6)d vs.(3.9±0.8)d,t =5.317,P=0.022],postoperative pain NRS score was [(3.61± 1.09)vs.(5.3 ± 1.3) score,t =6.290,P =0.016]and postoperative hospitalization time was [(5.9 ±1.6) d vs.(8.9 ± 1.9) d,t =3.069,P =0.031].In addition,the incidences of postoperative complications were lower in the VATS group than in the traditional thoracotomy group(1/30 or 3.3 ％ vs.5/20 or 25.0％,x2 =5.335,P=0.021).Conclusions Video-assisted thoracoscopic lobectomy is safe and effective in treating primary lung cancer in elderly patients and can promote postoperative recovery,which is more suitable for elderly patients with primary lung cancer.
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Objective To investigate the effect of exogenous vascular endothelial growth factor (VEGF) on bone activity of rabbit heterotopic allograft decalcified bone.Methods 140 adult healthy China white rabbits were selected,no limitation with sex,20 rabbits as the donor preparation of allogenic decalcified bone,according to the random number table,the rest was divided into the experimental group (allograft decalcified bone ± VEGF) and the control group (Allograft decalcified bone),each group contained 60 rabbits.For the experimental group,the prepared 1.5 cm long homologous decalcified tibia was placed in rabbit right thigh of rectus femoris and vastus medialis muscle gap near by saphenous artery,and fixed on the femur with two 0.8 mm Kirschner wire.In the vicinity of the skin,implanted an osmotic pump which contain the VEGF solution 200 μl with concentration was 0.5 μg/ml.In the control group,implanted the isometric allograft decalcified bone in rabbit right thigh corresponding parts with the same method.Each group respectively at 0,2,4,6,8,10 weeks to death 10 white rabbits,By specimen observation,HE dyeing observation and detection of type Ⅰ glue protein fluorescence intensity,Analysis the bone activation degree of two groups of bone allograft decalcified.Results Experimental allograft decalcified bone gradually wrapped by connective tissue membrane,its surface appear different size of the pits and gradually increased and become deep,while the control group pits relatively little and shallow.In the experimental group and control group,the fluorescence intensity of type Ⅰ collagen reached its peak respectively at 8 weeks (47.57 ±3.50) and 10 weeks (45.07±6.02),with no statistically significant (P ＞ 0.05).Conclusion Rabbit allograft decalcified bone implanted in the muscle clearance with abundant blood supply can be transformed into activated bone after 10 weeks,and after applying exogenous VEGF,allograft decalcified bone can be transformed into activated bone after 8 weeks,the bone activation process obviously speed up.The reaults confirmed the exogenous VEGF can obviously promote the ectopic rabbit bone allograft decalcified bone activation process.
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Research about proteomics is of great significance. Two-dimensional electrophoresis (2-DE) is a core technology of proteomics research, which is used for analysis of the protein extracted from cell, tissue and other sam-nology of proteomics research, which is used for analysis of the protein extracted from cell, tissue and other samples. In recent years, 2-DE combined with mass spectrum (MS) technology is widely used to identify differentialples. In recent years, 2-DE combined with mass spectrum (MS) technology is widely used to identify differential protein, to screen tumor markers, to detect drug targets and so on. Proteomics research has become key technology,protein, to screen tumor markers, to detect drug targets and so on. Proteomics research has become key technology, with its high throughput, high resolution and repeatability, and is widely used in various fields, particularly in bio-with its high throughput, high resolution and repeatability, and is widely used in various fields, particularly in biomedical research. We provided here a short review about the application development of 2-DE, especially its contribution on biological medicine.