Objective:To evaluate the effect of pre-infusion of hypertonic saline on the postoperative cognitive function in elderly patients.Methods:This was a prospective study. Seventy-six patients of both sexes, aged≥60 yr, of American Society of Anesthesiologists Physical Status classification Ⅱ or Ⅲ, who underwent elective shoulder arthroscopic surgery under brachial plexus block combined with general anesthesia from June 2022 to January 2023 in our hospital, were selected and divided into 2 groups ( n=38 each) by the random number table method: hypertonic saline group and normal saline group. At 30 min before anesthesia induction, 3% hypertonic saline of 4 ml/kg was intravenously infused in hypertonic saline group, and normal saline 4 ml/kg was intravenously infused in normal saline group. The occurrence of intraoperative cerebral desaturation events was recorded. Venous blood samples were collected at 24 h postoperatively, and the plasma concentrations of interleukin-1beta (IL-1β), IL-6, tumor necrosis factor-alpha and S-100β were measured by enzyme-linked immunosorbent assay, and the expression of neutrophil CD11b was detected by flow cytometry. Rey auditory verbal learning test, trail making test, digit symbol substitution test, and stroop color-word test were performed at 1 day before surgery and 5 days after surgery, and the postoperative cognitive dysfunction was assessed using the Z-score method. Results:Compared with normal saline group, the concentrations of plasma IL-6, tumor necrosis factor-alpha and S-100β and expression of neutrophil CD11b were significantly decreased in hypertonic saline group, and the incidence of cognitive dysfunction and cerebral desaturation events was decreased in hypertonic saline group ( P<0.05). Conclusions:Pre-infusion of hypertonic saline can reduce inflammatory responses and improve postoperative cognitive function in elderly patients.

Objective To measure the air-absorbed dose rate of gamma radiation in public areas for the situation of the local radiation environment. Methods Using a large-volume γ spectrometer system with a NaI(Tl) detector mounted on a UAV, we conducted large-scale airborne radiation monitoring in public areas in southwestern China, to measure the air-absorbed dose rate at a height of 1 m from the earth’s surface. Results The airborne radiation monitoring data were used to analyze the local radiation environment. The mean air-absorbed dose rate at a height of 1 m was 43.6 ± 12.9 nGy/h. Seven abnormal radiation points were detected, and two of them were located where construction was ongoing. At one of the abnormal radiation points, FH40G meter measurements showed that the air-absorbed dose rate at a height of 1 m was up to 22.0 μGy/h. Field soil samples were collected for HPGe γ spectrometer analysis: the ²³²Th radionuclide activity concentration was 96.0 kBq/kg, and the ²²⁶Ra radionuclide activity concentration was 9.9 kBq/kg. Conclusion Using the UAV-mounted large-volume γ spectrometer system with NaI(Tl) detectors for large-scale airborne monitoring is a fast and effective method for dragnet monitoring of the level of radiation in public areas.

Objective:This study aimed to reveal the distribution and course of the branches of the infraorbital nerve(IN),its communication relationship between the branches of the infraorbital nerve and facial nerve,so as to provide morphological basis for clinical implementation of accurate infraorbital nerve trunk in the infraorbital canal,regional facial anesthesia and facial surgery,so as to improve the success rate of maxillofacial surgery.Methods:25 adult cada-vers with formalin immobilized semi-face were selected.Exclude facial defect samples caused by tumor,trauma,deformity,surgery,etc.The length and diameter of the trunk of the infraorbital nerve and the length of the infraorbital canal were measured.The total number of infraorbital nerve and the number of branches were counted,and the course,distribution and communication relationship between infraorbital nerve and facial nerve were investigated.Results:The length of infraorbital nerve trunk ranged from 19.61 to 44.47 mm,with an average length of(23.33±4.95)mm.The length of infraorbital canal ranged from 9.49 to 31.21 mm,with an average length of(12.87±3.99)mm.The number of infraorbital nerve branches ranged from 5 to 12,and the average number was(7.29±2.29).The number of upper labial branches was the widest,ranging from 1 to 5,while the distribution area of eyelid branches was the narrowest.There are(were)a large number of intersections and anastomoses between the infraorbital nerve and the facial nerve,forming a complex multi-layer network structure.Conclusion:The infraorbital nerve trunk and the infraorbital canal va-ry in length.The number and distribution range of infraorbital nerve branches are not constant,and the communication relationship between infraorbital nerve and facial nerve is complicated.

Objective To investigate the effect of Zhuang medicated thread moxibustion on postherpetic neuralgia model rats,and to verify the mechanism of Th1/Th2/Th17 cytokine balance regulation in central nervous system.Methods 50 SD rats were randomly divided into blank group,model group,thread-moxibustion without drugs group,Zhuang medicated thread moxibustion group and pregabalin group,with 10 rats in each group.Except for blank group,the rat model of postherpetic neuralgia was induced by a single intrapitoneal injection of resin-toxin(RTX).After successful modeling,each group was given corresponding treatment for 21 days.The Mechanical Pain Threshold(PWT)and Thermal withdrawal latency(TWL)were detected 3 days before modeling,1,4 and 7 days after modeling,and 3,7,14 and 21 days after intervention.After the intervention,extract spinal cord tissue,Flow cytometry was used to detect changes in the proportion of Th1/Th2/Th17 cells;The mRNA expression levels of IFN-γ,IL-2,IL-4,IL-10,IL-17 and IL-22 were detected by qPCR;The positive expressions of IFN-γ,IL-2,IL-4,IL-10,IL-17 and IL-22 were observed by immunohistochemistry.The protein expressions of IFN-γ,IL-2,IL-4,IL-10,IL-17 and IL-22 were detected by Western blot to elucidate the regulation effect of this therapy on the equilibrium mechanism.Results After intrapitoneal injection of resin-toxin,the PWT of rats showed a downward trend,while the TWL showed an upward trend,showing the separation of heat and pain,which was consistent with the clinical manifestations of PHN.After Zhuang medicated thread moxibustion therapy,PWT increased and TWL decreased in PHN rats,which reduced the separation trend of heat and pain.Thread-moxibustion without drugs group,Zhuang medicated thread moxibustion group and pregabalin group can promote Th1 response in the central nervous system(spinal cord),increase the proportion of CD4+IL-2+cells and the contents of IFN-γ and IL-2 in the spinal cord tissue,and up-regulate the expression of IFN-γ and IL-2 mRNA and protein.Meanwhile,Th2 and Th17 responses in the central nervous system were inhibited,and the proportions of CD4+IL-4+and CD4+IL-17A+cells and the contents of IL-4,IL-10,IL-17 and IL-22 in the spinal cord tissue were reduced.The mRNA and protein expressions of IL-4,IL-10,IL-17 and IL-22 were down-regulated.In addition,Zhuang medicated thread moxibustion group and pregabalin group had similar efficacy in correcting Th1/Th2/Th17 lymphocyte imbalance in the central nervous system,and both were better than the Thread-moxibustion without drugs group.Conclusion Zhuang medicated thread moxibustion can improve the separation trend of heat and pain in postherpetic neuralgia rats,which may be achieved by regulating Th1/Th2/Th17 cell balance and related cytokine levels.

Objective:To evaluate the effect of pre-injection of young rat plasma on cognitive dysfunction after cerebral ischemia-reperfusion (I/R) in aged rats and the role of phosphatidylinositol 3-kinase/serine threonine protein kinase (PI3K/Akt) signaling pathway.Methods:Seventy-two SPF-grade healthy male Sprague-Dawley rats, aged 18 months, weighing 600-650 g, were divided into 4 groups ( n=18 each) by the random number table method: control group (group C), cerebral I/R group (group IR), pre-injection of young rat plasma group (group P) and PI3K inhibitor LY294002 group (group LY). In group P and group LY, young rat plasma 100 μl/time was injected via the tail vein. In group C and group IR, the equal volume of normal saline was injected via the the tail vein, 2 times a week for 4 weeks. Then the model of cerebral I/R injury was developed under sevoflurane anesthesia in IR, P and LY groups. LY294002 0.3 mg/kg was injected through the tail vein at 1 h before anesthesia in LY group. The neurological deficit score (Longa score) was performed at 24 h after reperfusion, and then 6 rats were randomly sacrificed, and brain tissues were obtained to determine the cerebral infarct volume. Spontaneous mobility and anxiety-like behavior were assessed by the open field test at day 29 of reperfusion, and cognitive function was assessed by the novel object recognition test at day 30 of reperfusion. At the end of the behavioral test, rats were sacrificed, hippocampal tissues were isolated for determination of the expression of phosphorylated PI3K (p-PI3K), phosphorylated Akt (p-Akt), postsynaptic dense protein-95 (PSD-95) and synaptic vesicle protein (SYN) (by Western blot), and the dendritic length and dendritic spine density of neurons in the hippocampal CA1 region. Results:There was no significant difference in motor speed, distance traveled, and time of staying at the center of the open field among the four groups ( P>0.05). Compared with group C, the Longa score and cerebral infarct volume were significantly increased, the percentage of novel object exploration and discrimination index were decreased, the expression of p-PI3K, p-Akt, PSD-95 and SYN in hippocampal tissues was down-regulated, and the dendritic length and dendritic spine density of hippocampal neurons were decreased in IR, P and LY groups ( P<0.05). Compared with group IR, Longa score and cerebral infarct volume were significantly decreased, the percentage of novel object exploration and discrimination index were increased, the expression of p-PI3K, p-Akt, PSD-95 and SYN in hippocampal tissues was up-regulated, and the dendritic length and dendritic spine density of hippocampal neurons were increased in group P ( P<0.05), and no significant change was found in the parameters mentioned above in group LY ( P>0.05). Compared with group P, Longa score and cerebral infarct volume were significantly increased, the percentage of novel object exploration and discrimination index were decreased, the expression of p-PI3K, p-Akt, PSD-95 and SYN in hippocampal tissues was down-regulated, and the dendritic length and dendritic spine density of hippocampal neurons were decreased in group LY ( P<0.05). Conclusions:Pre-injection of young rat plasma can attenuate cognitive dysfunction after cerebral I/R in aged rats, and the mechanism is related to activation of hippocampal PI3K/Akt signaling pathway and improvement in synaptic plasticity.

Postoperative thyroid scar not only causes itching, pain, and pulling, but also seriously affects the patient’s aesthetics, so it is important to study the prevention and treatment of postoperative thyroid scar. In the past 20 years, clinicians have made many innovative researches to alleviate postoperative thyroid scar growth, and the following progresses have been made: firstly, thyroid surgery methods and surgical accesses have been improved to a certain extent, resulting in more concealed and less traumatic accesses; secondly, the use of lasers and silicone and other drugs has significantly improved the scar treatment effect; thirdly, the concept of "cosmetic" is gradually gaining popularity, and related technical means are used throughout the treatment of postoperative scarring of the thyroid gland, and multiple treatment modalities are used "early" and "in combination" to "prevent" scar growth after surgery. The use of multiple treatment modalities to prevent scar growth in the early postoperative period has achieved twice the result with half the effort.

Objective:To evaluate the efficacy and safety of endoscopic biliary drainage for biliary fistula.Methods:Data of consecutive 409 biliary fistula patients who were treated and diagnosed at the First Medical Center of Chinese PLA General Hospital from November 2002 to November 2022 were reviewed, and 53 patients who received endoscopic retrograde cholangiopancreatography (ERCP) drainage were finally included. General information, procedural conditions, clinical outcomes and adverse events were analyzed. The patients were categorized into two groups: the endoscopic retrograde biliary drainage (ERBD) group ( n=46) and the endoscopic nasobiliary drainage (ENBD) group ( n=7). Procedural characteristics, operation outcomes, and operation time were compared between the two groups. Results:There were 36 males and 17 females, with the age of 52.2±12.7 years, among whom 58.5% (31/53) were secondary to cholecystectomy. Clinical success was achieved in 83.0% (44/53) patients, with the operation time of 27.0 (13.5, 33.5) minutes and the treatment session of 1 (1, 2). The time to resolution was 89 (47, 161) days. The success rate of ERCP for low-grade biliary fistula was higher compared with that of high-grade biliary fistula [96.4% (27/28) VS 68.0% (17/25), χ2=7.57, P=0.006]. Bridging drainage achieved higher success rate compared with that of non-bridging drainage [91.7% (33/36) VS 64.7% (11/17), χ2=5.95, P=0.015], while different diameters of stents (≥10 Fr VS <10 Fr) achieved similar success rate [81.8% (27/33) VS 84.6% (11/13), χ2=0.05, P=0.822]. Adverse events occurred in 10 patients (18.9%), including 6 pancreatitis, 2 bleeding, 1 cholangitis and 1 death. Except for 1 death, 9 other adverse events were mild and managed with conservative treatment without interventions. There was no significant difference in clinical success rate [6/7 VS 82.6% (38/46), χ2=0.04, P=0.838] or the median operation time [28.0 min VS 23.0 min, Z=0.38, P=0.774] between ENBD group and ERBD group. Conclusion:Endoscopic biliary drainage is safe and effective for biliary fistula. ENBD and ERBD have comparable clinical efficacy. ERCP for low-grade biliary fistula may achieve a higher success rate, and bridging drainage may facilitate fistula resolution.

Objective:To evaluate the effect of esketamine on the efficacy of postoperative patient-controlled intravenous analgesia (PCIA) in the patients with moderate central sensitization undergoing high tibial osteotomy.Methods:Fifty-four patients of both sexes with moderate central sensitization, aged 45-64 yr, with body mass index of 18.0-32.5 kg/m 2, of American Society of Anesthesiologists Physical Status classification Ⅰ or Ⅱ, undergoing elective high tibial osteotomy, were divided into 2 groups ( n=27 each) using a random number table method: control group (group C) and esketamine group (group ES). Ultrasound-guided femoral nerve block was performed with 0.5% ropivacaine 30 ml on the operated side at 30 min before induction of anesthesia.In C and ES groups, midazolam 0.1 mg/kg, sufentanil 0.2 μg/kg, propofol 1.5 mg/kg, and cisatracurium besilate 0.15 mg/kg were intravenously injected in turn during induction of anesthesia, and in addition esketamine hydrochloride 0.5 mg/kg was injected in ES group, and the equal volume of 0.9% sodium chloride was injected in C group, and then a laryngeal mask airway was placed.Anesthesia was maintained with intravenous infusion of remifentanil 0.1-0.3 μg·kg -1·min -1 and propofol 4-6 mg·kg -1·h -1.Esketamine hydrochloride 0.2 mg/kg was intravenously injected once every 20 min until 30 min before the end of operation in ES group, the equal volume of 0.9% sodium chloride was injected according to the amount of esketamine hydrochloride injected for the same body weight at the same time point in C group, and additional cisatracurium besilate was administered intermittently according to the degree of muscle relaxation.Intraoperative BIS values were maintained at 40-60.Postoperative PCIA was performed, and the patient was admitted to the post-anesthesia care unit.When the efficacy of PCIA was not good, ketorolac tromethamine 30 mg was intravenously injected for rescue analgesia.The intraoperative consumption of remifentanil and propofol and emergence time in the anesthesia recovery room were recorded.The pressing times of PCA and the number of rescue analgesia in each group were recorded within 2 days after operation.The Chinese Richards-Campbell Sleep Questionnaire was used to assess the nighttime sleep quality on the night of surgery and 1 and 2 days after surgery.The Chinese Quality of Recovery was used to assess the early recovery quality at 1 and 2 days after surgery.The first postoperative off-bed time and first walked distance were recorded.The adverse reactions were recorded. Results:Compared with group C, the consumption of remifentanil and propofol was significantly reduced, the emergence time in the anesthesia recovery room was prolonged, the pressing times of PCA and the number of rescue analgesia were decreased within 2 days after operation, the quality of nighttime sleep was improved on the night of surgery and 1 and 2 days after operation, the quality of early recovery on 1 and 2 days after operation was increased, the first postoperative off-bed time was shortened, the first walked distance was prolonged, and the incidence of postoperative adverse effects was decreased in group ES ( P<0.05). Conclusions:Esketamine can enhance the efficacy of postoperative PCIA in the patients with moderate central sensitization undergoing high tibial osteotomy.

Objective To establish a stably overexpressing miR-31 transgenic mouse and detect the expression of miR-31 in the organs and tissues,and to provide qualified tool mice with overexpression of miR-31 in vivo. Methods The miR-31 overexpression vector was constructed by Gateway cloning technology. The vector was injected into fertilized ovum by DNA microinjection technology,then transferred to the pseudopregnant mice and waited for eutocia. Newborn mouse tail DNA was extracted and PCR and agarose gel electrophoresis were performed to identify the positive miR-31 transgenic mice. microRNA was extracted from the organs and tissues of miR-31 transgenic mice and the expression of miR-31 was de-tected by RT-PCR. The expression of Nestin and number of neural stem cells in the nervous system were compared in the positive and WT mice. Results The miR-31 transgenic mice were constructed successfully and bred more than 14 genera-tions in barrier environment. Expression of miR-31 was increased in major organs and tissues. The expression of Nestin and the number of neural stem cells in the positive mice were higher than those in the wild type mice. Conclusions MiR-31 overexpressing transgenic mice are constructed by Gateway cloning technology and the expression of miR-31 is stable in sub-sequent generations. The number of neural stem cells in the nervous system is higher than that in wild-type mice. The miR-31 overexpressing transgenic mice can be a good tool for experimental research of the function of overexpressed miR-31 in vivo and the treatment of nervous system diseases.

Objective To evaluate the effect of transcutaneous electric acupoint stimulation (TEAS)on prognosis in the patients at high risk of postoperative pulmonary complications. Methods Sixty American Society of Anesthesiologists physical statusⅡorⅢpatients of both sexes, aged 65-72 yr, with body mass index of 18-25 kg∕m2, scheduled for elective thoracoscopic and laparoscopic radical resection of e-sophageal cancer, were divided into placebo control group(group C, n=30)and TEAS group(n=30). In group TEAS, bilateral Zusanli(ST36), Hegu(LI4)and Feishu(BL13)acupoints were stimulated for 30 min(disperse-dense waves, frequency 2∕100 Hz, intensity of currents 8-12 mA)starting from 30 min be-fore anesthesia induction.In group C, electrodes were placed on the same acupoints before anesthesia induc-tion, but no current was given.General anesthesia was performed in two groups.Before one-lung ventilation, at 30 min and 2 h of one-lung ventilation and at 1 h after operation(T1-4), blood samples were drawn from the radial artery for blood gas analysis, and oxygenation index and alveolar-arterial oxygen partial pressure difference were calculated.Blood samples were collected from the internal jugular vein at T1-3and 24 h after surgery(T5)for determination of plasma tumor necrosis factor-alpha, interleukin-6(IL-6)and IL-10 con-centrations.The development of postoperative pulmonary complications, time for removal of drainage tube and length of hospital stay were recorded. Results Compared with group C, the oxygenation index at T2-4and plasma IL-10 concentrations at T3were significantly increased, the alveolar-arterial oxygen partial pressure difference at T2,3, plasma tumor necrosis factor-alpha concentrations at T2,3, plasma IL-10 concentrations at T3,5and incidence of postoperative pulmonary complications were decreased, and the time for removal of drainage tube and length of hospital stay were shortened in group TEAS(P<0.05). Conclusion TEAS can improve prognosis in the patients at high risk of postoperative pulmonary complications.