ObjectiveTo compare the effects of the Rho-associated protein kinase (ROCK) inhibitors Fasudil and Y27632 on promoting angiogenesis in vivo and in vitro and on flap survival in mice. Methods Thirty-six SPF-grade adult male ICR mice were randomly divided into the Y27632 group, Fasudil group, and control group, with 12 mice in each group. From 3 d before surgery, the mice were intraperitoneally injected daily with Y27632 solution, Fasudil solution, and an equal volume of normal saline, respectively. Then, a peninsular flap model pedicled on the iliolumbar vessels on the back of the mice was established surgically. Laser speckle contrast imaging was used to evaluate flap blood perfusion immediately after surgery (day 0) and on day 5, and the pedicle artery diameter was measured and proximal and distal blood flow were calculated. On day 5 after surgery, the flap necrosis rate was calculated, and CD31-positive microvessel density in the distal part of the flap was detected by immunofluorescence. In addition, EdU cell proliferation, scratch, Transwell, and Matrigel tube formation assays were used to compare the effects of Fasudil and Y27632 on the proliferation, migration, invasion, and tube formation ability of human umbilical vein endothelial cells (HUVECs) in vitro, with DMSO treatment as the control. ResultsOn day 5 after surgery, the flap necrosis rate in the Fasudil group was (2.0±1.5)%, which was significantly lower than that in the control group and the Y27632 group (P<0.001), and the necrosis rate in the Y27632 group was also significantly lower than that in the control group (P<0.001). The pedicle iliolumbar artery diameter in the Fasudil group on day 0 and day 5 after surgery was (143.8±4.2) μm and (177.6±7.6) μm, respectively, both significantly larger than those in the control group and the Y27632 group (P<0.001). On day 5 after surgery, the proximal and distal blood flow in the Fasudil group were (453.0±12.5) PU and (79.2±4.8) PU, respectively, both significantly higher than those in the control group(P<0.001) and the Y27632 group (P<0.05). The microvessel density in the distal surviving tissue of the flap was (71.6±3.5) vessels/region, significantly higher than that in the control group (P<0.001) and also significantly higher than that in the Y27632 group (P＜0.05). On day 0 after surgery, the pedicle iliolumbar artery diameter in the Y27632 group was smaller than that in the control group (P＜0.05), while on day 5 after surgery, there was no statistically significant difference between the two groups (P>0.05). The proximal and distal blood flow on day 5 after surgery were also significantly higher than that in the control group (P<0.001), and the microvessel density was also significantly higher than that in the control group (P<0.05), but the distal blood flow showed no significant difference compared with the control group (P>0.05). In vitro experiments showed that the proliferation rate, migration rate, and number of invasive cells of HUVECs in the Fasudil and Y27632 groups were significantly increased compared with the control group (P<0.001), but there was no statistically significant difference between the two drug groups (P>0.05), whereas the tube formation ability of the Fasudil group was significantly better than that of the Y27632 group (P<0.05). ConclusionBoth Fasudil and Y27632 can effectively promote angiogenesis and improve flap survival rate, but the effect of Fasudil is more significant, which may be related to its sustained regulation of hemodynamics and vascular stability.

Objective To investigate the clinical utility of krebs von den lungen-6(KL-6),a sialoglycan antigen,in the auxiliary diagnosis of idiopathic pulmonary hemosiderosis(IPH)in children.Methods A total of 140 children admitted to the First Affiliated Hospital of Guangzhou Medical University from June 2014 to July 2024 were categorized into a case group and a control group.The case group was further subdivided into four subgroups based on disease type:IPH group(n=32),interstitial lung disease(ILD)group(n=22),pneumonia(PN)group(n=60),and non-pulmonary disease(NPD)group(n=26).Serum KL-6 levels were measured for all children across these groups,and the differences in KL-6 expression between children with IPH and those without IPH(including the ILD,PN,and NPD groups)were analyzed.Results The positive rates of KL-6 in each group of children,from highest to lowest,were as follows:IPH(68.75%),ILD(45.45%),PN(1.69%),and NPD(0.00%).The differences in positive rates between groups were statistically significant(χ2=66.10,P<0.001).The mean serum level of KL-6 in the IPH group was significantly higher than that in the PN group(Z=-6.92,P<0.001).Diagnostic test results indicated that the area under the ROC curve was 0.940(95%CI:0.89 to 1.00,P<0.001),with a cut off value of 392.00 U/mL,sensitivity of 81.30%,and specificity of 95.00%.Conclusions KL-6 demonstrates significant diagnostic value in distinguishing IPH children from those with PN and NPD,making it a promising blood biomarker for aiding in the diagnosis of IPH.

Objective:To evaluate the clinical process of fragment reattachment in crown-root fractures (CRF) of teeth that the fracture occurred between sub-gingival and supra-alveolar ridge (sub-gingival & supra-alveolar ridge) in the esthetic zone, and to analyze the feasibility of this minimally invasive technique for sub-gingival & supra-alveolar ridge CRF involving anterior teeth.Methods:Fourteen sub-gingival & supra-alveolar ridge CRF involving anterior teeth in 12 patients received fragment reattachment in the Department of Prosthodontics, School of Stomatology, the Fourth Military Medical University from January 2016 to August 2024. The success rate of the fractured teeth 3 years after reattachment and the complications during the follow-up period were retrospectively analyzed. The 3-year success rate and complications during follow-up were evaluated to assess the clinical efficacy of this technique.Results:The 14 treated teeth were followed for an average of (36.0±33.7) months (range: 4-99 months). Complications occurred in 2 teeth: one was extracted due to debonding and replaced with a removable partial denture, while the other developed a palatal sinus post-reattachment, which healed after local saline irrigation and medication (followed for 12 months without recurrence). The remaining 12 teeth exhibited no complications, resulting in a success rate of 13/14.Conclusions:Fragment reattachment is a minimally invasive, rapid, and cost-effective treatment option for sub-gingival & supra-alveolar ridge CRF in the anterior esthetic zone. With strict case selection, it delivers favorable outcomes and extends the clinical lifespan of affected teeth.

Objective:To evaluate the clinical process of fragment reattachment in crown-root fractures (CRF) of teeth that the fracture occurred between sub-gingival and supra-alveolar ridge (sub-gingival & supra-alveolar ridge) in the esthetic zone, and to analyze the feasibility of this minimally invasive technique for sub-gingival & supra-alveolar ridge CRF involving anterior teeth.Methods:Fourteen sub-gingival & supra-alveolar ridge CRF involving anterior teeth in 12 patients received fragment reattachment in the Department of Prosthodontics, School of Stomatology, the Fourth Military Medical University from January 2016 to August 2024. The success rate of the fractured teeth 3 years after reattachment and the complications during the follow-up period were retrospectively analyzed. The 3-year success rate and complications during follow-up were evaluated to assess the clinical efficacy of this technique.Results:The 14 treated teeth were followed for an average of (36.0±33.7) months (range: 4-99 months). Complications occurred in 2 teeth: one was extracted due to debonding and replaced with a removable partial denture, while the other developed a palatal sinus post-reattachment, which healed after local saline irrigation and medication (followed for 12 months without recurrence). The remaining 12 teeth exhibited no complications, resulting in a success rate of 13/14.Conclusions:Fragment reattachment is a minimally invasive, rapid, and cost-effective treatment option for sub-gingival & supra-alveolar ridge CRF in the anterior esthetic zone. With strict case selection, it delivers favorable outcomes and extends the clinical lifespan of affected teeth.

Objective To investigate the clinical utility of krebs von den lungen-6(KL-6),a sialoglycan antigen,in the auxiliary diagnosis of idiopathic pulmonary hemosiderosis(IPH)in children.Methods A total of 140 children admitted to the First Affiliated Hospital of Guangzhou Medical University from June 2014 to July 2024 were categorized into a case group and a control group.The case group was further subdivided into four subgroups based on disease type:IPH group(n=32),interstitial lung disease(ILD)group(n=22),pneumonia(PN)group(n=60),and non-pulmonary disease(NPD)group(n=26).Serum KL-6 levels were measured for all children across these groups,and the differences in KL-6 expression between children with IPH and those without IPH(including the ILD,PN,and NPD groups)were analyzed.Results The positive rates of KL-6 in each group of children,from highest to lowest,were as follows:IPH(68.75%),ILD(45.45%),PN(1.69%),and NPD(0.00%).The differences in positive rates between groups were statistically significant(χ2=66.10,P<0.001).The mean serum level of KL-6 in the IPH group was significantly higher than that in the PN group(Z=-6.92,P<0.001).Diagnostic test results indicated that the area under the ROC curve was 0.940(95%CI:0.89 to 1.00,P<0.001),with a cut off value of 392.00 U/mL,sensitivity of 81.30%,and specificity of 95.00%.Conclusions KL-6 demonstrates significant diagnostic value in distinguishing IPH children from those with PN and NPD,making it a promising blood biomarker for aiding in the diagnosis of IPH.

Objective To explore the predictive value of CT radiomics and morphological features for the prognosis and survival in non-small cell lung cancer(NSCLC)patients.Methods The clinic data of 300 NSCLC patients(300 lesions)were downloaded from the Cancer Imaging Archive,with 210 randomly selected as the training set and 90 as the test set.According to the prognosis and survival,the patients were divided into two groups with survival period≤3 and＞3 years.3D Slicer software was used to delineate the regions of interest layer by layer in CT images,and the radiomics features were extracted from each region of interest.Both t-test and least absolute shrinkage and selection operator were utilized for radiomics feature screening.Three types of prediction models,namely radiomics model,morphological model and combined model,were constructed with Logistic regression,whose performances were evaluated using the receiver operating characteristic(ROC)curve.Results The differences in radiomics labels and mediastinal lymph node metastasis between the training set and the test set were statistically significant.For radiomics model,morphological model and combined model,the area under the ROC curve was 0.784(95%CI:0.722-0.847),0.734(95%CI:0.664-0.804)and 0.748(95%CI:0.680-0.815)in the training set,and 0.737(95%CI:0.630-0.844),0.665(95%CI:0.554-0.777)and 0.687(95%CI:0.578-0.797)in the test set,which demonstrated that radiomics model had the best diagnostic performance.Conclusion The CT radiomics model can effectively predict the prognosis and survival in NSCLC patients.

Clinically, it is challenging to differentiate Crohn's disease (CD) from abdominal actinomycosis due to their similar symptoms. However, cases of CD with secondary actinomycosis infection are rare. This article systematically reviews the diagnosis and treatment process of a patient with CD complicated by secondary actinomycosis infection at the Air Force Medical University Xijing Digestive Disease Hospital, to provide ideas and experience for future clinical diagnosis and treatment.

With the advent of the knowledge economy and the information age,public hospitals are facing chal-lenges and opportunities to build new quality productivity.Through literature review and theoretical analysis,it pro-poses the definition of new quality productivity in public hospitals,five characteristics,and five distinctions from tra-ditional productivity.It constructs a multi-level driving logic framework for public hospitals to achieve high-quality de-velopment through new quality productivity.The relationship between hospital dynamic capabilities and new quality productivity is discussed,and internal and external influencing factors for enhancing new quality productivity are identified.It proposes specific implementation strategies,including enhancing environmental sensing capability,re-source integration,technological capability development,organizational culture and leadership improvement,and strengthening quality control systems based on dynamic capability theory.These strategies aim to provide theoretical basis and practical pathways for public hospitals to achieve high-quality development.

Clinically, it is challenging to differentiate Crohn's disease (CD) from abdominal actinomycosis due to their similar symptoms. However, cases of CD with secondary actinomycosis infection are rare. This article systematically reviews the diagnosis and treatment process of a patient with CD complicated by secondary actinomycosis infection at the Air Force Medical University Xijing Digestive Disease Hospital, to provide ideas and experience for future clinical diagnosis and treatment.

With the advent of the knowledge economy and the information age,public hospitals are facing chal-lenges and opportunities to build new quality productivity.Through literature review and theoretical analysis,it pro-poses the definition of new quality productivity in public hospitals,five characteristics,and five distinctions from tra-ditional productivity.It constructs a multi-level driving logic framework for public hospitals to achieve high-quality de-velopment through new quality productivity.The relationship between hospital dynamic capabilities and new quality productivity is discussed,and internal and external influencing factors for enhancing new quality productivity are identified.It proposes specific implementation strategies,including enhancing environmental sensing capability,re-source integration,technological capability development,organizational culture and leadership improvement,and strengthening quality control systems based on dynamic capability theory.These strategies aim to provide theoretical basis and practical pathways for public hospitals to achieve high-quality development.