On the influencing factors of learning style transformation among students in blended learning / 中华医学教育探索杂志

Objective:In the teaching practice based on "Internet+", there are relatively few studies on the transformation of learners' learning styles. This paper focuses on the practical factors that may affect the change of students' learning style in the teaching process of blended learning.Methods:Taking students from Batch 2017 of Inner Mongolia Medical University as the teaching objects who taught by blended learning, by means of questionnaire survey, interview, course performance analysis and other methods, this paper discusses the influence of students' learning style on learning effect and possible influencing factors in the process of blended learning.Results:In the process of teaching, students' learning styles have a profound impact on the learning effect to some extent. Therefore, the subjective and objective factors that affect students' learning style should be paid attention to.Conclusion:With the popularization of "Internet + education", the ways and environment of traditional education have undergone great changes. In the process of blended learning reform, teachers should pay more attention to learning styles of students, so as to better improve the teaching effect.

Clinical diagnosis and treatment plan of medullary thyroid carcinoma / 中华内分泌外科杂志

Objective:To explore the key factors affecting the formulation of treatment and prognosis of medullary thyroid carcinoma.Methods:Patient data, clinical characteristics and the results of follow-up of typical cases of 23 patients with medullary thyroid carcinoma admitted to Hunan Provincial People’s Hospital Breast and Thyroid Surgery from Apr. 2007 to Mar. 2020 were retrospectively analyzed. The therapeutic schedule and prognosis of medullary thyroid carcinoma were discussed in combination with ATA guidelines and others.Results:Of the 23 patients with MTC, 22 (95.65%) had elevated serum calcitonin, 15 (65.22%) had elevated carcinoembryonic antigen, 3 (13.04%) had suspected abnormal lymph nodes, and 2 (8.70%) had capsule invasion. Thyroid lobectomy, thyroid lobectomy with lateral lymph node dissection in level VI, total thyroidectomy, total thyroidectomy with lateral lymph node dissection in level VI, total thyroidectomy with bilateral lymph node dissection in level VI, total thyroidectomy with bilateral lymph node dissection in level VI with lymph node dissection in level I, II, III, IV, V or VII were performed in 1, 2, 3, 1, 13, 3 cases respectively. 8 cases had postoperative recurrence (34.78%) , of which 7 cases were caused by the first operation. The level of Ctn increased significantly in 2 cases before operation, who underwent total thyroidectomy with bilateral lymph node dissection in level VI, and no recurrence was found after operation.Conclusions:The key to the biological cure of medullary thyroid carcinoma is standardized surgical treatment. The surgery method cannot be determined simply by calcitonin. The modern treatment of medullary thyroid carcinoma needs to follow the principle of standardization and individualization at the same time.

A preliminary study on the expression of caspases in stretch-induced apoptosis in human periodontal ligament cells / 医用生物力学

Objective To study the expression of caspases in stretch-induced apoptosis in human periodontal ligament cells (HPDLCs).Methods HPDLCs in vitro were subjected to mechanical stretch with 20％ strain for 6 h or 24 h.The apoptotic rates were analyzed by flow cytometry.The protein expression of caspase-3,-5,-7,-8 and -9 was detected by Western blotting,and the activity of caspase-3,-5,-8 and-9 was measured using colorimetric assay.Results Mechanical stretches with 20％ strain for 6 h and 24 h could induce apoptosis in HPDLCs.Compared with non-stretching control group,the protein expression level and activity of caspase-3,as well as the protein expression level of caspase-7 were up-regulated by 24 h-stretch.The protein expression level and activity of caspase-5,-8,-9 were up-regulated after stretches for 6 h and 24 h.Conclusions Mechanical stretch with 20％ strain can induce apoptosis in HPDLCs in vitro,with the activation of caspase-3,-5,-7,-8 and-9.

The Application of Intelligent CO2 Laser in the Treatment of Otosclerosis / 听力学及言语疾病杂志

Objective To investigate the effects of the intellegent CO2 laser assisted Fisch stapedotomy with artificial stape prostheses in the treatment of otosclerosis.Methods A total of 28 patients with otosclerosis who had undergone the intellegent CO2 laser assisted Fisch stapedotomy with artificial stape prostheses were retrospectively e-valuated.The intellegent CO2 lasersare was used to vaporize stapedius tendon,posterior crus of stapes,and most importantly perforate stapes footplate.Bone and air conduction thresholds were determined at 0 .5 ,1 ,2 ,and 4 kHz preoperatively and 6 months postoperatively in all patients.Results No sustained vertigo or sensorineural hearing loss occurred postoperatively.There were no statistically significant differences between preoperative and postopera-tive average bone conduction thresholds.Preoperative and postoperative air bone gap were 30.38(23.13,39.38)dB HL,9.75(8.25,10)dB respectively and the postoperative results were significantly different from the preopera-tive.Conclusion The intellegent CO2 laser can be used safely in stapes footplate surgery and is well suited for trea-ting otosclerosis.

The expression and clinical significance of VEGF-C and CD24 in lung cancer / 中华胸心血管外科杂志

Objective To study the expressions of VEGF-C and CD24 in lung cancer and their clinical significance,and to discuss the relationship between their expressions as well.Methods The methods of RT-PCR and immunohistochemical staining are adopted.The expression levels of VEGF-C,CD24 mRNAs and proteins in 138 primary lung cancer patients'cancer tissues and paracancerous tissues are detected.Results (1) The expression levels of VEGF-C,CD24 mRNA and proteins in lung cancer tissues are all higher than those in paracancerous tissues (P ＜ 0.05).There is evident positive correlativity between the expressions of VEGF-C and CD24 in lung cancer(P ＜ 0.05) (2) The expression levels of VEGF-C,CD24 mRNA and proteins in the metastasis group are all higher than those in the non-metastasis group (P ＜ 0.05).(3) There is evident correlativity between the expression of VEGF-C,CD24 and lymph node metastasis,TNM staging(P ＜ 0.05).(4) The expressions of VEGF-C,CD24 mRNA and proteins are both related to the short-term prognosis of the Stage ⅢA patients.Conclusion VEGF-C and CD24 are both abnormally expressed in lung cancer tissues,which can be used as a marker of lung cancer diagnosis.

Initial experience of previously blocking both pulmonary artery and veins in true video assisted thoracic surgery for the treatment of NSCLC / 中华胸心血管外科杂志

ObjectiveWe evaluate our experience of previously blocking both pulmonary artery and veins in true video assisted thoracic surgery (VATS) for the treatment of non-small-cell lung carcinoma ( NSCLC ).MethodsSix patients undergoing lobectomy with previously blocking both pulmonary artery and veins in the VATS in our institution between December 2007 and June 2011 were reviewed.ResultsIn our series,six patients required previously blocking both pulmonary artery and veins in the VATS,The mean occlusion time of PA and PV was (42.0 ± 8.6 ) min and ( 39.3 ± 8.2 ) min,respectively.Four patients required partial PA reconstruction.The mean repair time of the PA was (21.25 ±9.91 ) min.No complications attributable to the technique or mortality were seen.There were no local recurrences on the pulmonary artery.ConclusionIt is feasible and safe that the technology of previously blocking of the pulmonary artery and veins was applied in VATS.This technique can reduce the risk of intraoperative bleeding and the chance of converting to open thoracotomy,and extend the inclusion criteria of VATS lobectomy.

Reversion of hypoxta and reoxygenation injury of alveolar type Ⅱ cells by simvastatin / 中华胸心血管外科杂志

Objective To investigate the protective effects of simvastatin on cobalt choride ( CoCl2 ) -induced hypoxia and reoxygenation injury on alveolar type Ⅱ cells and the underlying mechanisms.Methods CoCl2 was used to establish the hypoxia and reoxygenation injury model on AT Ⅱ cells.Blank,control and variant doses simvastatin-treated groups ( 5,10,20,30,50,100 μ mol/L) were designed in the present study.The proliferation of AT Ⅱ cells was evaluated by Cell Counting Kit-8 ( CCK-8 ) assay.The percentage of apoptotic cells was assessed by flow cytometry AV/PI double-staining.The protein levels of surfactant protein-C (SP-C) and proliferating cell nuclear antigen (PCNA) in AT Ⅱ cells was determined by Western blot.Results As compared with the control group,pretreatment with low dose (5 - 20 μmol/L),but not high dose simvastatin (50 - 100 μmol/L) markedly reduced A549 cells apoptosis,and increased their proliferation and the protein levels of SPC and PCNAin vitro.The protective effect could be reversed in vitro by L-mevalonate,a simvastatin competitive inhibitor,which indicated that the inhibition of mevalorate pathway was involved in the simvastatin induced AT Ⅱ cells function restoration.Condusion Low doses simvastatin reversed CoCl2-induced hypoxia and reoxygenation injury of AT Ⅱ cells.The inhibition of mevalonate pathway contributed to simvastatin induced AT Ⅱ cells function restoration.

Intratympanic Gentamycin for Intractable Meniere Disease / 听力学及言语疾病杂志

Objective To explore the effect of intratympanic gentamycin on intractable Meniere's disease.Methods 10 patients diagnosed of intractable Meniere disease were analyzed respectively.Results 9 patients got A and 2 patients got B in controlling vertigo.1 patient gots B and 9 patients got C in hearing result.Conclusion Intratympanic gentamycin for intractable Meniere disease is an effective method.It should be studied further.