Real-time acquisition of pulmonary ventilation and perfusion information through thoracic electrical impedance tomography (EIT) holds significant clinical value. This study proposes a novel method based on the rime (RIME) algorithm-optimized variational mode decomposition (VMD) to separate lung ventilation and perfusion signals directly from raw voltage data prior to EIT image reconstruction, enabling independent imaging of both parameters. To validate this approach, EIT data were collected from 16 healthy volunteers under normal breathing and inspiratory breath-holding conditions. The RIME algorithm was employed to optimize VMD parameters by minimizing envelope entropy as the fitness function. The optimized VMD was then applied to separate raw data across all measurement channels in EIT, with spectral analysis identifying relevant components to reconstruct ventilation and perfusion signals. Results demonstrated that the structural similarity index (SSIM) between perfusion images derived from normal breathing and breath-holding states averaged approximately 84% across all 16 subjects, significantly outperforming traditional frequency-domain filtering methods in perfusion imaging accuracy. This method offers a promising technical advancement for real-time monitoring of pulmonary ventilation and perfusion, holding significant value for advancing the clinical application of EIT in the diagnosis and treatment of respiratory diseases.
Humans ; Electric Impedance ; Algorithms ; Tomography/methods* ; Pulmonary Ventilation/physiology* ; Lung/diagnostic imaging* ; Image Processing, Computer-Assisted/methods* ; Adult

Severe open tibiofibular fractures account for approximately 28.1% of all open fractures. Among them, Gustilo-Anderson type IIIB/C fractures present significant clinical challenges due to associated bone and soft tissue defects, high infection rates, and risk of amputation. Inadequate preoperative assessment may lead to suboptimal emergency surgical planning or intraoperative complications. Historically, external fixation was often preferred, but this approach has been associated with limitations such as restricted joint mobility, delayed bone union, joint stiffness, and disuse osteoporosis, resulting in poor functional recovery. With advancements of debridement techniques, standardization of antibiotic use, and popularization of early soft tissue coverage, early internal fixation has gained broader acceptance. Nevertheless, controversies persist regarding the choice of fixation method, timing of definitive fixation, use of reamed versus unreamed intramedullary nailing, and necessity of fibular fixation. To standardize the diagnosis and early management of severe open tibiofibular fractures, reduce complication rates, and improve functional recovery, the Society of Microsurgery of the Chinese Medical Association organized a panel of domestic experts to develop the Evidence-based guideline for the diagnosis and early fixation of severe open tibiofibular fractures ( version 2025), using evidence-based methodology. The guidelines provided 12 recommendations covering diagnostic and early fixation strategies of severe open tibiofibular fractures, aiming to provide clinicians with scientifically grounded and standardized guidance.

Objective To explore the clinical efficacy of modified anteromedia approach with superior extensor retinaculars and traditional anteromedia combined with posterolateral approach in the treatment of Rüedi-Allg?wer type Ⅲ Pilon fractures.Methods In this study selected 56 patients with Rüedi-Allg?wer type Ⅲ Pilon fractures treated in our hospital from January 2020 to January 2022,all of whom met the inclusion and exclusion criteria,27 in the experimental group and 29 in the control group.Both groups underwent open reduction and internal fixation of Pilon fractures.The experimental group used a modified anteromedial approach to preserve the supraspinatus,while the control group used a traditional anteromedial combined with posterolateral approach to cut off the supraspinatus.The general clinical data,operation time,intraoperative blood loss,postoperative drainage volume,fracture reduction quality,early pain VAS score,complications and ankle function evaluation of the experimental group and the control group were compared in detail,and the early clinical efficacy of the two surgical methods was analyzed and compared.Results There were no significant differences in age,gender,body mass index(BMI),complications,injury mechanism and the time from admission to operation between the experimental group and the control group(P>0.05).Experimental group:operation time(115.92±12.23)min,intraoperative blood loss(129.25±16.15)mL,postoperative drainage volume(82.44±25.57)mL,fracture healing time(17.89±2.39)w;Control group:operation time(172.75±15.09)min,intraoperative blood loss(177.24±14.36)mL,postoperative drainage volume(115.06±21.95)mL,fracture healing time(19.93±3.75)w.The operative time and fracture healing time of the experimental group were less than those of the control group(P<0.05),and the intraoperative blood loss and postoperative drainage volume of the experimental group were less than those of the control group,the difference was statistically significant(P<0.05).The Buewell-Charnley fracture reduction radio-logical evaluation criteria were used to evaluate the fracture reduction,and the rate of good reduction was 96.29%in the experimental group and 93.10%in the control group.There was no statistical significance in the anatomical reduction between the two groups(P>0.05).Visual analog scale(VAS)was used to evaluate postoperative pain,and pain VAS scores of the experimental group were lower than those of the control group at 3 days,1 week and 4 weeks after surgery(P<0.05).Both groups were followed up for at least 12 months after surgery,and the incidence of postoperative complications in the experimental group was lower than that in the control group(P<0.05).The AOFAS score of the experimental group was higher than that of the control group at 3 months,6 months and 12 months after surgery(P<0.05).Conclusion Improvement on the medial approach retains the superior extensor retinaculum,relative to the combined surgical approach to cut off the superior extensor retinacu-lum treatment Rüedi-Allg?wer Ⅲ Pilon fractures,with shorter operation time,less intraoperative blood loss,less postoperative complications and other advantages.The functional recovery of the ankle joint in the modified antero-medial approach preserving the superior extensor retinaculum was better than that in the combined approach cutting the superior extensor retinaculum.

Objective To explore the clinical efficacy of modified anteromedia approach with superior extensor retinaculars and traditional anteromedia combined with posterolateral approach in the treatment of Rüedi-Allg?wer type Ⅲ Pilon fractures.Methods In this study selected 56 patients with Rüedi-Allg?wer type Ⅲ Pilon fractures treated in our hospital from January 2020 to January 2022,all of whom met the inclusion and exclusion criteria,27 in the experimental group and 29 in the control group.Both groups underwent open reduction and internal fixation of Pilon fractures.The experimental group used a modified anteromedial approach to preserve the supraspinatus,while the control group used a traditional anteromedial combined with posterolateral approach to cut off the supraspinatus.The general clinical data,operation time,intraoperative blood loss,postoperative drainage volume,fracture reduction quality,early pain VAS score,complications and ankle function evaluation of the experimental group and the control group were compared in detail,and the early clinical efficacy of the two surgical methods was analyzed and compared.Results There were no significant differences in age,gender,body mass index(BMI),complications,injury mechanism and the time from admission to operation between the experimental group and the control group(P>0.05).Experimental group:operation time(115.92±12.23)min,intraoperative blood loss(129.25±16.15)mL,postoperative drainage volume(82.44±25.57)mL,fracture healing time(17.89±2.39)w;Control group:operation time(172.75±15.09)min,intraoperative blood loss(177.24±14.36)mL,postoperative drainage volume(115.06±21.95)mL,fracture healing time(19.93±3.75)w.The operative time and fracture healing time of the experimental group were less than those of the control group(P<0.05),and the intraoperative blood loss and postoperative drainage volume of the experimental group were less than those of the control group,the difference was statistically significant(P<0.05).The Buewell-Charnley fracture reduction radio-logical evaluation criteria were used to evaluate the fracture reduction,and the rate of good reduction was 96.29%in the experimental group and 93.10%in the control group.There was no statistical significance in the anatomical reduction between the two groups(P>0.05).Visual analog scale(VAS)was used to evaluate postoperative pain,and pain VAS scores of the experimental group were lower than those of the control group at 3 days,1 week and 4 weeks after surgery(P<0.05).Both groups were followed up for at least 12 months after surgery,and the incidence of postoperative complications in the experimental group was lower than that in the control group(P<0.05).The AOFAS score of the experimental group was higher than that of the control group at 3 months,6 months and 12 months after surgery(P<0.05).Conclusion Improvement on the medial approach retains the superior extensor retinaculum,relative to the combined surgical approach to cut off the superior extensor retinacu-lum treatment Rüedi-Allg?wer Ⅲ Pilon fractures,with shorter operation time,less intraoperative blood loss,less postoperative complications and other advantages.The functional recovery of the ankle joint in the modified antero-medial approach preserving the superior extensor retinaculum was better than that in the combined approach cutting the superior extensor retinaculum.

Severe open tibiofibular fractures account for approximately 28.1% of all open fractures. Among them, Gustilo-Anderson type IIIB/C fractures present significant clinical challenges due to associated bone and soft tissue defects, high infection rates, and risk of amputation. Inadequate preoperative assessment may lead to suboptimal emergency surgical planning or intraoperative complications. Historically, external fixation was often preferred, but this approach has been associated with limitations such as restricted joint mobility, delayed bone union, joint stiffness, and disuse osteoporosis, resulting in poor functional recovery. With advancements of debridement techniques, standardization of antibiotic use, and popularization of early soft tissue coverage, early internal fixation has gained broader acceptance. Nevertheless, controversies persist regarding the choice of fixation method, timing of definitive fixation, use of reamed versus unreamed intramedullary nailing, and necessity of fibular fixation. To standardize the diagnosis and early management of severe open tibiofibular fractures, reduce complication rates, and improve functional recovery, the Society of Microsurgery of the Chinese Medical Association organized a panel of domestic experts to develop the Evidence-based guideline for the diagnosis and early fixation of severe open tibiofibular fractures ( version 2025), using evidence-based methodology. The guidelines provided 12 recommendations covering diagnostic and early fixation strategies of severe open tibiofibular fractures, aiming to provide clinicians with scientifically grounded and standardized guidance.

Microglia-mediated neuroinflammation is widely perceived as a contributor to numerous neurological diseases and mental disorders including depression. Discs large homolog 1 (Dlg1), an adaptor protein, regulates cell polarization and the function of K
Animals ; Depression/chemically induced* ; Inflammation ; Lipopolysaccharides/toxicity* ; Mice ; Mice, Inbred C57BL ; Mice, Knockout ; Microglia ; NF-kappa B ; Neuroinflammatory Diseases

Microglia-mediated neuroinflammation is widely perceived as a contributor to numerous neurological diseases and mental disorders including depression. Discs large homolog 1 (Dlg1), an adaptor protein, regulates cell polarization and the function of K

As drug carriers, magnetic nanoparticles can specifically bind to tumors and have the potential for targeted therapy. It is of great significance to explore non-invasive imaging methods that can detect the distribution of magnetic nanoparticles. Based on the mechanism that magnetic nanoparticles can generate ultrasonic waves through the pulsed magnetic field excitation, the sound pressure wave equation containing the concentration information of magnetic nanoparticles was derived. Using the finite element method and the analytical solution, the consistent transient pulsed magnetic field was obtained. A three-dimensional simulation model was constructed for the coupling calculation of electromagnetic field and sound field. The simulation results verified that the sound pressure waveform at the detection point reflected the position of magnetic nanoparticles in biological tissue. Using the sound pressure data detected by the ultrasonic transducer, the B-scan imaging of the magnetic nanoparticles was achieved. The maximum error of the target area position was 1.56%, and the magnetic nanoparticles regions with different concentrations were distinguished by comparing the amplitude of the boundary signals in the image. Studies in this paper indicate that B-scan imaging can quickly and accurately obtain the dimensional and positional information of the target region and is expected to be used for the detection of magnetic nanoparticles in targeted therapy.
Acoustics ; Computer Simulation ; Magnetics ; Magnetite Nanoparticles ; Tomography

Cell autophagy plays a key role in maintaining intracellular nutritional homeostasis during starvation through elimination of aberrant or obsolete cellular structures. The cellular cytoskeleton has a crucial role in multiple processes involving membrane rearrangements and vesicle-mediated events. Autophagy is mediated by both microtubules and actin networks: microtubules promote the synthesis of autophagosome and are related to the movement of autophagosome; actin networks have been implicated in structurally supporting the expanding of phagophore, moving autophagosomes and enabling their efficient fusion with the lysosome; non-muscle myosinⅡoperates in the early stages of autophagy during the initiation and expansion of the phagophore, whereas myosinⅥ and myosin 1C are involved in the late stages of autophagosome maturation and fusion with the lysosome, respectively. This review summarizes the multiple regulation of cytoskeleton on autophagy and focuses on the regulation of autophagy by actin and myosin, providing a new approach for the study of pathogenesis and innovative therapies of autophagy related diseases.

Objective To investigate the relationship between abnormal bone mineral density (BMD) and subclinical thyroid dysfunction. Methods Thyroid function, biochemical indicators of bone metabolism and BMD were reviewed retrospectively in the subjects who received health checkups from July 1, 2009 to January 31, 2017 in the Health Check-up Department of Peking Union Medical College Hospital. People who had thyroid dysfunction, recognized risk factors for osteoporosis, and medication history were excluded. A cross-sectional analysis of thyroid status and biochemical indicators of bone metabolism was performed by the standard methods. BMD at the lumbar spine and femoral neck was measured using dual energy X-ray absorptiometry. Results A total of 6884 subjects (3726 women and 3158 men) were enrolled in the study, with an average age of (50.74 ± 10.41) years. They were divided into three groups:subclinical hyperthyroid, subclinical hypothyroid, and euthyroidism. The alkaline phosphatase in subclinical hyperthyroid group was higher than that in the euthyroidism group[ (67.95±20.64)U/L vs. (63.88±18.99)U/L]. Calcium and phosphorus in blood were higher in both subclinical hyperthyroid and subclinical hypothyroid groups. The rate of abnormal BMD in male euthyroidism, subclinical hyperthyroid and subclinical hypothyroid groups were 36.10％(1049/2906), 29.27％(12/41) and 27.01％(57/211), respectively. The rate of abnormal BMD showed no difference between subclinical hyperthyroid group and euthyroidism group (P>0.05). The rate of abnormal BMD was lower in subclinical hypothyroid group than in euthyroidism group (χ2=7.0901, P<0.01), especially in the males aged 40-49 years (χ2=10.4618, P<0.01). The rate of abnormal BMD in female euthyroidism, subclinical hyperthyroid and subclinical hypothyroid groups was 38.81％(1286/3314), 45.83％ (33/72) and 40.88％ (139/340), respectively. The rate of abnormal BMD showed no difference among the three groups (P>0.05). Conclusion There is no significant difference in the rate of abnormal BMD between subclinical thyroid dysfunction group and euthyroidism group, possibly because abnormal serum biochemical indicators preceded the presence of low BMD. More sensitive methods used to determine the status of bone metabolism await to be developed.