OBJECTIVES: To investigate the application of transesophageal echocar-diography assessment for mitral valve in patients with atrial septal defects undergoing repair surgery. METHODS: The study group comprised of thirty-two adult patients with atrial septal defect who underwent thoracoscopic repair surgery at the First Affiliated Hospital of the Air Force Medical University from March to September 2022. Two-dimensional and real-time three-dimensional transesophageal ultrasonography of the mitral valve were performed after anesthesia. The parameters of the mitral valve structure at the late diastolic and late systolic stages were recorded, including anteroposterior and left-right annular diameters, anterior and posterior valves lengths, the vertical distance from the coaptation point of leaflet zone 2 during systole to the annular plane (mitral valve coaptation depth) and mitral valve coaptation length. Data from 32 patients with normal intracardiac structure and no mitral valve regurgitation (control group) were also collected and compared with those of the study group. Concurrent mitral valvoplasty was performed during the atrial septal defect repair surgery for 7 patients with significant mitral valve structural abnormalities and 2 patients with significantly increased mitral regurgitation after cardiac resuscitation. The study group was followed up with transthoracic echocardiography for 2 years postoperatively. RESULTS: In the study group, 26 (81.3%) patients had varying degrees of mitral valve morphological abnormalities. Among them, 10 (31.3%) patients had short mitral valve coaptation length or depth, 12 (37.5%) patients had closure point malposition, and 4 (12.5%) patients had different bulge of anterior and posterior leaflets. Compared with the control group, the study group had significantly smaller systolic and diastolic mitral left-right annular diameter, mitral posterior valves lengths, mitral coaptation length or depth (all P<0.05), a higher pulmonary systemic flow ratio (P<0.01), and a lower maximum blood flow velocity across the mitral valve (P<0.05). After 2 years of follow-up, among the 9 patients who underwent concurrent mitral valvoplasty, the mitral valve maintained no or little regurgitation, and the average mitral valve pressure difference was less than 5 mmHg (1 mmHg=0.133 kPa). Among the 23 patients without concurrent mitral valvoplasty, 2 patients had moderate regurgitation 1 year after surgery, with a pulmonary/systemic flow ratio larger than 2.8. CONCLUSIONS Patients with large atrial septal defects often have abnormal mitral valve structure. Therefore transesophageal echocardiography is recommended for mitral valve assessment during the surgery. If significant mitral valve structural abnormalities are detected, concurrent mitral valvoplasty is recommended.
Humans ; Heart Septal Defects, Atrial/diagnostic imaging* ; Echocardiography, Transesophageal/methods* ; Mitral Valve/surgery* ; Adult ; Female ; Male ; Middle Aged ; Mitral Valve Insufficiency/diagnostic imaging*

Natural antimicrobial peptides (AMPs) are promising candidates for the development of a new generation of antimicrobials to combat antibiotic-resistant pathogens. They have found extensive applications in the fields of medicine, food, and agriculture. However, efficiently screening AMPs from natural sources poses several challenges, including low efficiency and high antibiotic resistance. This review focuses on the action mechanisms of AMPs, both through membrane and non-membrane routes. We thoroughly examine various highly efficient AMP screening methods, including whole-bacterial adsorption binding, cell membrane chromatography (CMC), phospholipid membrane chromatography binding, membrane-mediated capillary electrophoresis (CE), colorimetric assays, thin layer chromatography (TLC), fluorescence-based screening, genetic sequencing-based analysis, computational mining of AMP databases, and virtual screening methods. Additionally, we discuss potential developmental applications for enhancing the efficiency of AMP discovery. This review provides a comprehensive framework for identifying AMPs within complex natural product systems.

Objective To explore application of our self-designed U-shaped transdermal surgical navigator based on three-dimensional reverse design in cannulated screwing for femoral neck fracture Methods A retrospective study was done of 5 patients with femoral neck fracture who had been treated from August 2016 to March 2017.They were 3 men and 2 women,aged from 33 to 60 years (average,46.5 years).Thin layer CT scanning was conducted on the patients' affected hip (at the left side in 2 cases and at the right side in 3).Based on their CT data,3D design software and 3D printing technique were used to manufacture the U-shaped transdermal surgical navigator and a real-sized model of the fracture.Operations were simulated using the U-shaped transdermal surgical navigator on the fracture model to determine the angle,depth and location of the screwing.Fixation of the fracture with cannulated screws was conducted after confirmation of satisfactory surgical parameters.The postoperative X-ray films of the patients were reviewed.Evaluations were conducted of the screw position,operating time,volume of operative bleeding,and number of intraoperative X-ray shots.Results The screw positions in the 5 patients were consistent with their preoperative design.Four patients had only one shot of fluoroscopy and one patient 3 shots.Their operating time ranged from 15 to 30 minutes,averaging 22.5 minutes;their bleeding ranged from 5 to 10 mL,averaging 7.5 mL.The 5 patients were followed up for an average of 4.5 months (from 3 to 6 months).By the Harris scoring at their final follow-ups,one was excellent,3 good and one fair.No complications like pain,functional impairment of the joint,or collapse or necrosis of the femoral head occurred during the follow-up.Conclusions Our self-designed U-shaped transdermal surgical navigator based on three-dimensional reverse design can significandy improve the accuracy and safety of the cannulated screwing for femoral neck fractures.The operation is minimally invasive,reducing operating time and intraoperative blood loss.

OBJECTIVE:To analyze the dyeing status of cinnabar and its pieces,and provide reference for its quality clinical safetey appicaton. METHODS:TLC was used for the qualitative identification of amaranth,carmine,erythrosine,acid red 73, 808 udan and indirubin. HPLC-MS was used to detect the 808 udan :HPLC conditions were as follows,column was Acquity UPLC BEH C18 with mobile phase of cetonitrile-0.1% formic acid(70∶30,V/V)at a flow rate of 0.3 ml/min,the detection wave-length was 520 nm;MS conditions were as follows,ion source was electrospray ionization source,scanning mode was positive ion scanning with full scanning tandem mass spectrometry,nebulizer pressure was 30 psi,drying gas was nitrogen,ion spray voltage was 4 000 V,collision energy was 30 V,and the injection volume was 5 μl. The volumetric method was used for content determi-nation of HgS. RESULTS:TLC spots of amaranth,carmine,erythrosine,acid red 73,808 udan and indirubin were clear and well-separated. 4 batches of 808 udan dyeing were included in the 18 batches of samples,6 batches had non-compliance contents (including 3 batches of 808 udan dyeing). CONCLUSIONS:Dyeing-doped and other quality problems exist in the cinnabaris in markets,which should be noticed.

Objective To investigate the significanceof both the adenomatous polyposis coli (APC)and deleted in colorectal carcinoma (DCC)gene methylation in the early diagnosis of lung cancer.Methods 245 patients with lung cancer and 150 patients with non-malignant lung disease patients and 40 healthy volunteers were drawn for the experiment.A methylation specific PCR (MSP)was used to detect the methylation status of APC and DCC in the peripheral blood.Results The posi-tive rates of APC and DCC genes promoter methylation Peripheral blood of patients with lung cancer were 26.53% (65/245)and 36.33% (89/245),respectively.The positive rates of APC and DCC genes promoter methylation Peripheral blood of patients with benign lung diseases were 2.67% (4/150),8.00%(12/150),respectively.The positive rates of APC and DCC genes promoter methylation Peripheral blood of healthy volunteers were 0.There was a significant difference between patients with the lung cancer,those with the benign lung diseases and Healthy volunteers (P <0.01).The sensitivity and specificity of lung cancer was respectively 52.65% and 89.33% by the combination of APC and DCC genes methylation. Comparing with the separate APC detection,sensitivity and specificity statistical differences were significant in joint meas-urement (P <0.01).Comparing with the separate DCC detection,sensitivity statistical differences were significant,but spe-cificity statistical differences was not obvious (P >0.05).There was no correlation between methylation test results and pa-tient gender,age,pathological type,pathological grade,TNM stage and so on (P >0.05).Conclusion APC and DCC gene methylation were closely related to the development of non-small cell lung cancer.They can be used as an early diagnostic marker of lung cancer.

Objective To evaluate the efficacy of standard large trauma craniectomy to treat the patients with severe bump brain injury. Methods Thirty-two bump brain injured patients with cerebral hernia were treated with inside and outside decompression of standard large trauma craniectomy compared with 24 cases of routine temporoparietal craniectomy between Oct 2001 and Aug 2004.Results In standard large trauma craniectomy group,21 cases got good recovery(65.6%) and 5 were dead(15.6%).In routine temporoparietal craniectomy group,9 cases got good recovery(37.5%) and 10 were dead(41.7%).There was significant difference between the two groups in good recovery and mortality(P