Ripple structure is widely used in space suits,and the predicted trajectory motion is realized according to its large deformation behavior.Due to the complexity of irregular bellows structure,the existing researches are mostly based on the display dynamic method,and lack the systematic analysis of geometric nonlinearity and the effect of shell section thickness under the framework of statics.This study combines statics and arc length method(Riks),introduces linear buckling mode defects,and analyzes the ultimate bending behavior of irregular bellows with different shell thicknesses.It is concluded that the thick-shell model exhibits higher apparent deformation tolerance due to geometric softening effect,and the contact force distribution between ripples can be accurately extracted by static analysis,which provides a basis for the inversion of external force loads.The deformation mode of bellows after introducing defects based on statics-Riks is proposed,and the control mechanism of shell section thickness on deformation path is revealed.

Objective:To investigate the clinicopathological, immunophenotypic and molecular genetic characteristics, and differential diagnosis of NTRK-rearranged spindle cell neoplasms (NTRK-RSCNs) in the gastrointestinal tract.Methods:Two NTRK-RSCNs diagnosed at the Department of Pathology of the First Affiliated Hospital of Zhengzhou University, Zhengzhou, China and one case diagnosed at Zhengzhou Central Hospital, Zhengzhou, China from 2019 to 2022 were collected. The clinical data, histopathology, immunophenotypes and prognosis were analyzed. Fluorescence in situ hybridization (FISH) and next-generation sequencing (NGS) were used to detect NTRK gene rearrangements, while relevant literature was also reviewed and discussed.Results:Two patients were male and one was female, with the age of 17, 47 and 62 years, respectively. The tumors were located in the duodenum, ascending colon and descending colon, respectively. The tumors were protuberant masses with gray and rubbery sections. Their maximum diameter was 2.5, 5.0 and 10.0 cm, respectively. Histologically, the tumors invaded mucosa, intrinsic muscle and serosal adipose tissue. Tumor cells consisted of spindle or oval shaped cells with monotonous morphology and arranged in bundles or stripes pattern. Spindle cells were mildly to moderately atypical, with slightly eosinophilic cytoplasm and inconspicuous nucleoli. Necrosis and mitotic figures were observed in one high-grade tumor. All tumors expressed CD34, S-100 and pan-TRK in varying degrees. FISH analysis showed that NTRK1 gene was break-apart in 1 case and NTRK2 gene break-apart in 2 cases. NGS technologies showed LMNA::NTRK1 fusion in one case, STRN::NTRK2 fusion in another case. All patients recovered well after the surgery without recurrence at the end of the follow-up.Conclusions:NTRK-RSCN is rarely diagnosed in the gastrointestinal tract and has significant variations in morphology. It overlaps with various other mesenchymal tumors which should be considered as differential diagnoses. Be familiar with the features of histological morphology in combination with immunophenotype and molecular genetic characteristics can not only help diagnose NTRK-RSCNs, but provide therapeutic targets for clinical treatment.

Objective:To investigate the effects of sorafenib on hypoxia inducible factor-1 (HIF-1) and vascular endothelial growth factor (VEGF) levels and recurrence in patients with intrahepatic cholangiocarcinoma with microvascular invasion.Methods:Ninety-two patients with intrahepatic cholangiocarcinoma who received treatment in Yiwu Central Hospital between November 2013 and November 2019 were included in this study. They were randomly assigned to undergo either conventional basic treatment (control group, n = 46) or conventional basic treatment and sorafenib treatment (study group, n = 46). Clinical efficacy, the incidence of adverse reactions and recurrence rate were compared between the two groups. Before and after treatment, HIF-1, alpha fetoprotein (AFP) and VEGF levels were also compared between the two groups. Results:After treatment, total effective rate in the study group was significantly higher than that in the control group [63.04% (29 /46) vs. 28.26% (13/46), χ2 = 11.215, P < 0.05]. After treatment, HIF-1, AFP and VEGF levels in each group were significantly lower than those before treatment (all P > 0.05). After treatment, HIF-1 [(165.23 ± 39.67) pg/mL], AFP [(109.16 ± 67.31) ng/mL] and VEGF [(297.28 ± 42.41) pg/mL] levels in the study group were significantly lower than those in the control group [(205.56 ± 40.23) pg/mL, (235.17 ± 106.41) ng/mL, (365.16 ± 40.91) pg/mL, t = 4.841, 6.788, 7.813, all P < 0.05]. There was no significant difference in the incidence of adverse reactions between the two groups ( P > 0.05). Six-month follow-up revealed that the incidence of recurrence in the study group was significantly lower than that in the control group ( χ2 = 4.792, P < 0.05). Conclusion:Sorafenib can reduce the HIF-1, AFP and VEGF levels in patients with intrahepatic cholangiocarcinoma with microvascular invasion, improve the clinical efficacy, decrease the incidence of recurrence, but cannot increase the incidence of adverse reactions.

Objective:To explore the effectiveness of blended learning in the clinical teaching of wound care clinic.Methods:Blended learning based on WeChat and offline CBL teaching method was constructed by applying evidence-based nursing. Totally 125 interns from the wound care clinic of our hospital were selected as subjects, among which 62 didn't receive the blended learning (control group), and 63 received the blended learning (observation group). At the end of the two-week practice, the effectiveness of the two teaching methods was compared. The objective evaluation was carried out in the forms of theory test, practice evaluation and comprehensive quality questionnaire combined with online self-test and offline practice. All data were analyzed by SPSS 20.0 statistical software.Results:The scores of theory test, practice evaluation and comprehensive quality assessment in the observation group were all higher than those in the control group ( P<0.001). Conclusion:The blended learning with WeChat as the medium can guide student active learning, consolidate the basic knowledge, improve the efficiency of teaching, stimulate the enthusiasm of practice, and improve the comprehensive quality. It's a clinical teaching method that can be used for reference.

Objective:To investigate the clinicopathological features, molecular genetics, treatment and prognosis of Burkitt-like lymphoma with 11q aberration (BLL-11q).Methods:Six cases of BLL-11q diagnosed at the First Affiliated Hospital of Zhengzhou University, from January 2016 to January 2020 were reviewed and analyzed using hematoxylin-eosin staining, immunohistochemistry, EBER in situ hybridization and fluorescence in situ hybridization. Clinical information including follow-up data was collected and analyzed.Results:The median age of the six immunocompetent patients was 29 years (range 20-38 years) and the male to female ratio was 5∶1. All patients had nodal disease in the head and neck region. Five patients had Ann Arbor stage Ⅰ-Ⅱ disease, while one patient had stage Ⅳ disease. Lymph nodes showed partial or total architectural effacement by a diffuse proliferation of monomorphic lymphocytes. Four cases were morphologically similar to Burkitt lymphoma, and two cases were unclassified with histological features between Burkitt lymphoma and diffuse large B-cell lymphoma. Mitotic figures, apoptosis and necrosis were conspicuous. Five cases exhibited the"starry sky"pattern. CD20, CD10 and bcl-6 were diffusely and strongly positive. The Ki-67 index was more than 95%. The follicular-dendritic-cell meshwork was noted in one case using CD21 stain. C-MYC was expressed variably. CD3, bcl-2, MUM-1, CD30 and TDT were negative in all cases. EBER in situ hybridization was also all negative. FISH analyses using C-MYC, bcl-2 and bcl-6 break-apart probes were all negative. All cases had the 11q23.3 gain/11q24.3 loss pattern, and 11q23.3 amplification was found in one case. IgH and IRF4 break-apart probes analysis was also negative. All patients were alive with no disease after a follow-up of 4 to 19 months.Conclusion:BLL-11q is a rare lymphoma that resembles Burkitt lymphoma morphologically and phenotypically, but lacks C-MYC gene rearrangements. Instead, it has a chromosome-11q alteration characterized by proximal gains and telomeric losses. It′s necessary to improve our understanding of BLL-11q to avoid misdiagnosis and missed diagnosis.

Objective As one of the important parts of medical scientific research outcomes,the significance of nursing patents is becoming more and more prominent during recent years.However,the nursing department is the blind spot of intellectual property in most hospitals.This article tried to explore strategies to eliminate harriers to the implementation of nursing intellectual property rights in order to promote nursing patents.Methods This paper conducted systematic analysis of the problems and obstacles in the implementation and transformation of nursing patents,and proposed tailored administrative plan.Results Identified obstacle factors include personal reasons of the nursing staff,heavy daily clinical work,as well as the immature patent system and patent market in China.Accordingly,our hospital adopted several corrective measurements,for instance,improving the support for the implementation of nursing patents,strengthening the cultivation and incubation of the intellectual property of nursing staff and standardizing the patent management.Conclusions These measures have effectively im proved the awareness and enthusiasm of nurses' patent knowledge.And we have obtained the ice breaking of the transformation of nursing patents in our hospital.

Objective To explore the appropriate scientific research award mechanism to promote the transformation of scientific and technological achievements.Methods Literature review was adopted to conduct comprehensive analysis of the incentive mechanisms of foreign patent transformation as well as related policies in China.Results Aimed to providing sufficient opportunities and motivation for the patent transformation platform,increasing the proportion of incentives for R&D personnel and setting up performance rewards for scientific research administration,a policy named Provisions on the proportion of rewards for R&D personnel after the transformation of intellectual property rights in Zhongshan Hospital was developed,which effectively facilitated the medical patents to market transformation.Conclusions It is alerted that improve the enthusiasm of relevant personnel for patent transformation plays important role in increasing the transformation of medical patents.

Objective The demand for medical intellectual property transformation has been increasing.However,the current patent transformation system in our country is not yet perfect.The specialization and complexity of patent value evaluation hampered the transformation.In this article,we argued and analyzed the method of value evaluation before the transformation of medical patent in order to promote the transformation of medical patent.Methods Through the analysis and comparison of classic patent valuation models,the advantages and disadvantages of the three types of cost method,market method and income method are summarized,also introduced the methods and experience of Zhongshan Hospital affiliated to Fudan University.Results The three methods including comprehensive cost accounting,market value valuation and negotiation between the two parties to carry out the pre-transformation value evaluation,can help to obtain the transaction valuation value of the medical patent that meets the current actual situation.Conclusions The scientific and operable value evaluation method of medical patents before transformation,organized approval process and clear revenue management are vital strategies for the transformation of medical patents.

Objective: To explore the effects of paracondylar-lateral cervical approach for resection of the jugular foramen schwannoma(JFS). Methods: A total of 15 patients with JFS operated via the paracondylar-lateral cervical approach between December 2011 and March 2016 at Department of Neurosurgery in Xiangya Hospital of Central South University were retrospectively analyzed. There were 7 males and 8 females, aging from 22 to 77 years with a mean age of (41.9±15.8) years.There were 12 patients who accepted primary surgery, 3 patients who accepted secondary surgery. There were 10 patients with tinnitus or hearing loss, 8 patients with dysphagia, 9 patients with hoarseness, 7 patients with tongue hemiparesis, 8 patients with ataxia, 1 patient with Pyramidal signs, 2 patients with facial hypesthesia or pain, 1 patient with facial paresis. According to Samii JFS grading system, 2 patients were type B, 4 were type C and 9 were type D. All patients were followed-up through outpatient and telephone by MRI in 3, 9, 12 months postoperation. Results: Gross total removal of tumors were achieved in 14 patients and subtotal removal in 1 patient. Two patients had new hoarseness, 2 had new dysphagia and 3 had more serious dysphagia, 1 patient had more serious facial paresis after the operation. There were 2 patients with intracranial infection, 2 with pneumonia, 1 with subcutaneous effusion, 1 with cerebrospinal fluid rhinorrhea, 5 with gastric intubation during perioperative period. There were no death, intracranial hematoma and decreased hearing patients. All patients were followed up, the follow-up time were 3 to 33 months with a mean of (26.9±11.2) months. Till to the latest follow up, dysphagia improved in 2 cases, hoarseness and tongue hemiparesis improved in 3 cases, hearing loss and tinnitus improved in 9 cases, balance function improved in 7 cases, facial hypesthesia and pain improved in 2 cases, pyramidal signs disappeared in 1 case, facial nerve function improved to normal in 1 case. There was no recurrence and progressed case. Conclusion Paracondylar-lateral cervical approach is an alternative approach for both intracranial and extracranial JFS.

Objective To observe the brain tissue recovery in patients with bilateral chronic subdural hematomas after drilling and drainage treatments. Methods The clinical data of 143 patients with bilateral chronic subdural hematoma performed drilling and drainage in our hospital from January 2011 to December 2016 were collected, including gender, age, the longest and widest diameters of the skull and the longest diameter of the initial hematoma, the widest diameter of the initial hematoma, the widest diameter of the postoperative hematoma, and other clinical information. The postoperative absorption of hematoma and recovery of brain tissues were analyzed. Results In these 143 BCSDH patients, 119 were male and 24 were male; the mean age of these patients was (67.7 ±1.1) years (21-92 years old), and the mean age of male patients was (67.2 ±1.2) years and the mean age of female patients was (70.2±2.5) years. The longest diameters of the skull was 134.8 mm-177.8 mm (averaged 155.5 mm± 0.7 mm) and the widest diameters of the skull was 113.5 mm-147.0 mm (averaged 131.7 mm±0.5 mm). The longest diameters of the left and right initial hematomas were (113.4±2.5) mm and (117.6±2.1) mm,and the widest diameters of the left and right initial hematomas were (15.8±0.5) mm and (17.2±0.8) mm. There was no significant difference in the recovery rate of brain tissues between patients with different gender, age or lesion sides (P<0.05). The recovery rate of brain tissues was positively correlated with the longest and widest diameters of initial hematomas (r=0.143, P=0.018; r=0.181, P=0.002). A total of 58 patients (40.6％) presented a single-side distance<10 mm from the brain tissue to the inner edge of the skull within one week after surgery, and a total of 48 patients (33.6％) showed both sides brain recovery to<10 mm. Conclusions Drilling and drainage are the first line treatment for patients with bilateral chronic subdural hematoma and contribute to the re-location of brain tissues. The rate of brain tissue recovery is positively correlated with the size of primary hematoma.