Objective:To understand the impact of menopausal hormone therapy(MHT)on bone turnover markers(BTMs)in menopausal women and explore the feasibility of BTMs as efficacy monitoring indicators for MHT.Methods:Menopausal women who visited the Menopause Clinic and Gynecological Endocrine Clinic of our hospital from January 2018 to August 2022,received MHT and had regular reexaminations of BTMs were selected.According to the treatment plan at the initiation of MHT,they were divided into the estrogen group(continuous or cyclic sequential therapy or continuous combined therapy)and the tibolone group.All patients had reexaminations of BTMs,including osteocalcin(OC),beta C-terminal telopeptide of type Ⅰ collagen(β-CTX),and procollagen type Ⅰ N-terminal propeptide(P1NP),before treatment and at 6 months,12 months and 24 months after treatment.Meanwhile,their bone mineral density examination results in our hospital were collected.The BTMs before and af-ter treatment in each group were compared,as well as the changes in BTMs after treatment compared with those before treatment between the two groups.Meanwhile,the changes in bone mineral density were analyzed.Results:The levels and abnormal rates of BTMs(β-CTX,P1NP,OC)in both the estrogen group and the tibolone group were significantly decreased at 6,12,and 24 months after treatment compared with those before treatment,and the differences were statistically significant(P＜0.05).When comparing the changes in BTMs after treatment compared with those before treatment between the two groups,there was no statistically significant difference(P＞0.05).The incidences of osteopenia and osteoporosis in patients at 12 months and 24 months after treat-ment had no significant changes compared with those before treatment,and the differences were not statistically significant(P＞0.05).The lumbar spine bone mineral density was significantly improved at 12 months and 24 months after MHT treatment compared with that before treatment,and the differences were statistically significant(P＜0.05).The bone mineral densities of the femoral neck and hip were not significantly improved at 12 months and 24 months after MHT treatment compared with those before treatment,and the differences were not statisti-cally significant(P＞0.05).Conclusion:The anti-bone resorption effects of the two MHT regimens are similar.The BTMs(OC,β-CTX,PINP)are significantly decreased after 6 months of treatment and can maintain their ef-fectiveness.BTMs can be used as one of the important monitoring methods for the efficacy of menopausal hor-mone therapy.

Objective:To understand the impact of menopausal hormone therapy(MHT)on bone turnover markers(BTMs)in menopausal women and explore the feasibility of BTMs as efficacy monitoring indicators for MHT.Methods:Menopausal women who visited the Menopause Clinic and Gynecological Endocrine Clinic of our hospital from January 2018 to August 2022,received MHT and had regular reexaminations of BTMs were selected.According to the treatment plan at the initiation of MHT,they were divided into the estrogen group(continuous or cyclic sequential therapy or continuous combined therapy)and the tibolone group.All patients had reexaminations of BTMs,including osteocalcin(OC),beta C-terminal telopeptide of type Ⅰ collagen(β-CTX),and procollagen type Ⅰ N-terminal propeptide(P1NP),before treatment and at 6 months,12 months and 24 months after treatment.Meanwhile,their bone mineral density examination results in our hospital were collected.The BTMs before and af-ter treatment in each group were compared,as well as the changes in BTMs after treatment compared with those before treatment between the two groups.Meanwhile,the changes in bone mineral density were analyzed.Results:The levels and abnormal rates of BTMs(β-CTX,P1NP,OC)in both the estrogen group and the tibolone group were significantly decreased at 6,12,and 24 months after treatment compared with those before treatment,and the differences were statistically significant(P＜0.05).When comparing the changes in BTMs after treatment compared with those before treatment between the two groups,there was no statistically significant difference(P＞0.05).The incidences of osteopenia and osteoporosis in patients at 12 months and 24 months after treat-ment had no significant changes compared with those before treatment,and the differences were not statistically significant(P＞0.05).The lumbar spine bone mineral density was significantly improved at 12 months and 24 months after MHT treatment compared with that before treatment,and the differences were statistically significant(P＜0.05).The bone mineral densities of the femoral neck and hip were not significantly improved at 12 months and 24 months after MHT treatment compared with those before treatment,and the differences were not statisti-cally significant(P＞0.05).Conclusion:The anti-bone resorption effects of the two MHT regimens are similar.The BTMs(OC,β-CTX,PINP)are significantly decreased after 6 months of treatment and can maintain their ef-fectiveness.BTMs can be used as one of the important monitoring methods for the efficacy of menopausal hor-mone therapy.

Objective:To investigate the distribution and primary drainage sites of the venous drainage system in the pedicled nasal septal mucosal flap, as well as to examine protective measures for the venous system of the nasal septal mucosal flap and its application in repairing the nasal skull base through the anatomical study of the nasal septum mucosal venous system in cadavers.Methods:Gross anatomy dissections were performed on 13 sides perfused fresh frozen cadaveric head specimens. The nasal septum mucosal flap was separated along the perichondrium and subperiosteum, then passed across the vomer, anterior wall of sphenoid sinus, clivus, and towards the anterior edge of vertical plate of palatine bone. Detailed documentation, including photographs, was made to record the morphology, distribution and drainage location of veins of the nasal septum mucosal flap and its pedicle, along with number of sphenopalatine veins. Furthermore, venous injuries resulting from obtaining a pedicled nasal septal mucosa flap were observed. From March 2023 to March 2024, a retrospective analysis was conducted on patients with nasopharyngeal lesions who underwent surgical repair using a modified pedicled nasal septum mucosal flap for venous system protection in the ENT institute and Department of Otorhinolaryngology at the Eye & ENT Hospital of Fudan University. The postoperative endoscopy was employed to assess the viability of the mucosal flap.Results:The veins of the nasal septum mucosa were primarily located in the posterior region, including the vomerine region, anterior wall of the sphenoid sinus, clivus region, and posterolateral wall of the nasal cavity, in a reticular pattern. Perforating veins draining into these bony structures could be observed, although their quantity and morphology varied. Notably, no prominent sphenopalatine veins were identified in 10 specimens examined, while 3 specimens exhibited sphenopalatine veins: one with a small single branch and two with venous bundles. Preservation of the nasal septal vein was possible when dissection was limited to the anterior edge of the wing of vomer. A wider range of dissection increased the risk of veinous injury. In cases where only vascular pedicles at the sphenopalatine foramen were preserved, three cadaveric head specimens retained intact sphenopalatine veins, while drainage veins were completely destroyed in ten other specimens. Fifteen patients with unilateral lesions (8 with recurrent nasopharyngeal carcinoma and 7 with nasopharyngeal radionecrosis) were included in this study. The postoperative reconstructions were carried out using contralateral pedicled nasal septal mucosal flaps. The average follow-up time was 7 months (ranging from 3 to 12 months), and all the nasal septal mucosal flaps survived.Conclusions:The primary location of the drainage vein within the nasal septum mucosa is situated in its posterior region, where it penetrates into adjacent bone structures. Very few sphenopalatine veins pass through the sphenopalatine foramen. Extensive dissection of the pedicled nasal septal mucosal flap may potentially impair the venous system and adversely affect flap survival rates, necessitating further clinical exploration.

Nasopharyngeal carcinoma (NPC) is a common malignant tumor in China. Radiotherapy is the first-line treatment. After appropriate radiotherapy, about 5%-15% patients experience recurrence. In view of the poor efficacy and high incidence of severe late toxicities associated with re-irradiation, salvage surgery by the transnasal endoscopic approach is recommended for recurrent NPC (rNPC). Compared with re-irradiation, endoscopic surgery can better prolong survival, improve the quality of life, and reduce complications and medical expenses of patients with rNPC. However, the complexity of the nasopharyngeal skull base enhances the difficulty and risk of surgery. Expanding the boundary of surgical resection remains a clinical challenge for otolaryngologists. In this regard, to help more advanced patients with rNPC, the surgical innovative system of NPC needs to be established by multi-disciplinary cooperation, involving skull base anatomy-based investigation, appropriate administration of the internal carotid artery (ICA), repair of skull base defect, and establishment of various types of endoscopic endonasal nasopharyngectomy.

Objective:To investigate the feasibility of endoscopic salvage surgery for patients with rT2 recurrent nasopharyngeal carcinoma (rNPC) and to analyze their prognostic factors.Methods:The clinical data of 33 patients with rT2 rNPC who underwent endoscopic extended nasopharyngectomy in Eye & ENT Hospital Affiliated to Fudan University from January 2015 to July 2020 were analyzed, including 29 males (87.9%) and 4 females (12.1%), aging (51.7±10.6) years. The clinicopathological characteristics of these patients were recorded and analyzed, in terms of gender, sex, alcohol and cigarette use, interval between primary treatment to recurrence, adjuvant therapy, lymph node metastasis, internal carotid artery (ICA) invasion, necrosis, margin and reconstruction materials. Kaplan Meier analysis was used to plot the overall survival rate and progression free survival rate curve, Log-rank test was used to analyze the prognostic factors among patients, and multivariate Cox proportional hazards regression was used to determine the independent risk factors of tumor progression free survival.Results:Among 33 patients with rT2 rNPC, the recurrence interval of 24 patients with rNPC after primary radiotherapy was more than 2 years. A total of 25 patients received primary radiotherapy and adjuvant chemotherapy at the same time. There were 6 cases with cervical lymph node metastasis, 12 cases with ICA invasion, 8 cases with positive surgical margin, 7 cases underwent ICA embolization before operation. A total of 18 cases underwent pedicled tissue flap repairment after operation, including 12 pedicled nasal septal mucosa flaps and 6 temporalis muscle flaps. The median follow-up time was 15 months. Five patients died because of disease progression (in 2 cases), post surgical ICA hemorrhage (in 1 case), liver metastasis (in 1 case) and dysphagia (in 1 case). The 1-year, 2-year and 3-year overall survival rates of all patients were 93.9%, 81.8% and 81.8%, respectively. The 1-year, 2-year and 3-year progression free survival rates were 74.7%, 59.7% and 40.9%, respectively. Log-rank statistical analysis showed that the positive surgical margin ( P=0.060) and recurrence interval ( P=0.151) were possibly related to the prognosis of rT2 rNPC. Multivariate Cox regression analysis showed that the positive surgical margin was an independent risk factor for patients with rT2 rNPC ( P=0.034). Nasopharynx hemorrhage occurred in 4 patients, skull base bone necrosis occurred in 2 patients, trismus occurred in 3 patients, and no obvious brain complications occurred in 7 patients with ICA embolization. Conclusion:Endoscopic salvage surgery for rT2 rNPC is a safe and effective surgical option, but the long-term effect still needs long-term follow-up in bulk cases.

The technical deficiencies in traditional medical imagining methods limit the study of
Ankle ; Ankle Joint ; Biomechanical Phenomena ; Range of Motion, Articular ; Technology

Objective To examine the effects of shoe cushioning on impact characteristics, kinematics and dynamics of lower extremities before and after neuromuscular fatigue during drop landing. Methods Fifteen trained male athletes were required to execute three successful trials of drop landing from a 60-cm platform before and after fatigue protocol. The impact force, loading rate, lower extremity kinematics, joint moment, joint stiffness were compared. Results Before fatigue, highly-cushioned shoes reduced the loading rate at heel before fatigue, and the time to peak loading rate of heel was significantly shorter than that of control shoes. After fatigue, highly-cushioned shoes significantly reduced the peak impact force and loading rate at heel, loading rate at forefoot. Meanwhile the time to peak impact force and peak loading rate at heel were significantly longer, and the contact and minimum angle of ankle were significantly greater. No significant changes were found in lower extremity stiffness, peak moment and joint stiffness of ankle. Conclusions In the situation where neuromuscular activity is reduced, highly-cushioned shoes can effectively attenuate the impact, thereby helping to avoid or reduce the potential impact damage after fatigue.

The research progress in fatigue protocols and biomechanics of lower extremity and its relationship with injury induced by exercise-induced fatigue was reviewed in this paper. At present, fatigue protocols can be divided into the traditional fatigue-induced protocol and the functional fatigue-induced protocol under laboratory condition. The former mainly includes power-cycling model, treadmill run model and step-ups model, while the latter is closer to what is experienced during competition, which is usually shown as multidirectional movements. In addition, the biomechanical measures of exercise-induced fatigue mainly include kinematics, ground reaction force, joint mechanics and electromyography. Different fatigue protocols do not uniformly produce alterations in lower limb biomechanical factors. The refinement of fatigue protocols and specific indicators should be considered in future studies, in order to compare the induced effects of fatigue protocols and provide references for the selection of fatigue protocols in laboratory tests. Meanwhile, the relationship between the response of brain-nerve system and the activation of musculoskeletal system for specific athletic task should be focused, so as to understand the difference of biomechanical mechanisms between fatigue protocols and further explore the effect of exercise-induced fatigue on sports injuries.

Objective: To explore and construct the cognitive response model for patients suffering conflicts with nurses, and to provide guidance cues for the prevention and treatment of nurse-patient conflict. Methods: According to the grounded theory approach devoloped by Strauss, a total of 9 patients were observed and interviewed in a semi-structured way, and the collected data was analysed to extract the cognitive response theme. Results: A cognitive response model for patients with nurse-patient conflicts was established, which included three phases, i.e., the demands of expectations, the emotional catharsis, and the introspection of right and wrong. Conclusion The established congnitive response model confirmes the relationships among environmental factors, patients′ cognitive processes, and patients′ reponse, and can be used to prevent and deal with the conflicts between patients and nurses.

Objectives To explore the effect of fatigue intervention on biomechanics of lower extremity and performance during the stretch-shortening cycle(SSC) movement-drop jumps(DJ).Methods The Vicon motion capture system and 3D Kistler force plates were used to collect sagittal plane kinematics and ground reaction force data synchronously of a total of fifteen trained male athletes under pre-and post-fatigue conditions with shuttle running + vertical jumping fatigue protocol.The joint angle,joint moment,power,work,and leg/joint stiffness were compared before and after fatigue.Results After fatigue,the maximum height of DJ decreased(P＜0.05),while the touchdown angle and the range of motion(△θ) of knee and ankle joints,as well as the occurrence time for the eccentric,concentric and total phase increased(P＜0.05).However,the maximum push-off moment and power of knee reduced(P＜ 0.05).The stiffness of knee and ankle joints during the eccentric phase reduced,resulting in the reduction of the leg stiffness(P＜0.05).Moreover,the energy absorption and net energy of the ankle joint decreased;meanwhile,the energy contribution of the knee joint decreased during the eccentric phase of a DJ task.Conclusion Fatigue changes the movement pattern,decreasing the control ability of the lower extremity especially in the knee and ankle joint,and results in decreased performance.Moreover,the decrease of leg,ankle and knee stiffness and the corresponding energy can be used as sensitive indexes to evaluate the performance of drop jumps in a fatigued condition.