Objective To explore the expression level and clinical significance of multifunctional CD8 T cells in patients with tuberculosis (TB). Methods The expression levels of MTB antigen specific and non-specific multifunctional CD8 T cells among peripheral blood mononuclear cells (PBMCs) and pleural fluid mononuclear cells (PFMCs) in TB patients, latent tuberculosis infection patients (LTBI) and healthy controls (HC) were measured by flow cytometry. Results The expression level of multifunctional CD8 T cells (IL-2+IFN-γ+TNF-α+CD8 T cells) among PBMCs stimulated by non-specific MTB antigen in TB patients was (5.72 ± 4.32)%, which was significantly lower than those in HC and LTBI [(22.3 ± 15.7)%, q=7.455, P<0.001;(14.2 ± 7.72)%, q=3.110, P<0.05]. Under the stimulation by specific MTB antigen, the expression level of multifunctional CD8 T cells among PBMCs in TB patients was (0.33 ± 0.83)%, which was significantly higher than those in HC and LTBI [(0.017 ± 0.03)%, q=3.97, P<0.05;(0.019 ± 0.035)%, q=3.39, P<0.05]. In patients with tuberculous pleurisy, the expression level of multifunctional CD8 T cells among PFMCs was (0.623 ± 1.033)%, which was significantly higher than that among PBMCs [(0.034 ± 0.066)%, P<0.001]. The expression level of multifunctional CD8 T cells in TB patients was negatively correlated with HRCT score (r=-0.265 8, P=0.015 8). Conclusion The expression level of multifunctional CD8 T cells was contributed to discriminate TB patients from latent tuberculosis infection patients , and was closely related to the degree of damage in lung.

Objective:To compare the efficacy between locking plate internal fixation combined with iliac bone graft and separate locking plate internal fixation in the treatment of comminuted proximal humeral fracture in the elderly.Methods:A retrospective cohort study was conducted to analyze the clinical data of 42 elderly patients with comminuted proximal humeral fracture admitted to Affiliated Hospital of Qingdao University from January 2018 to January 2020. There were 20 males and 22 females, aged 65-75 years [(69.5±8.5)years]. According to Neer classification, there were 26 patients with three-part fracture and 16 with four-part fracture. Eighteen patients were treated by locking plate internal fixation combined with autologous iliac bone grafting (bone grafting group), and 24 patients were treated by locking plate internal fixation alone (non-bone grafting group). The operation time, intraoperative blood loss, postoperative drainage volume, hospitalization time, and fracture healing time were documented. Shoulder joint range of motion (forward flexion, extension, internal rotation and external rotation) and degree of humeral head height loss were measured at 1, 6, 12 months after operation and at the last follow-up. The Neer score and visual analogue score (VAS) of shoulder joint were evaluated at 12 months after operation and at the last follow-up. The complications were observed.Results:All patients were followed up for 12-24 months [(18.5±3.8)months]. There were no significant differences in operation time, intraoperative blood loss, postoperative drainage volume and hospitalization time between the two groups (all P>0.05). The fracture healing time in bone grafting group was (3.1±0.7)months, shorter than (4.2±0.9)months in non-bone grafting group ( P<0.05). In the two groups, the postoperative shoulder joint range of motion and degree of humeral head height loss increased significantly over time (all P<0.05). At 1, 6, 12 months after operation and at the last follow-up, the shoulder forward flexion range of motion in bone grafting group was (136.2±7.4)°, (139.3±6.9)°, (146.6±6.1)° and (148.4±4.7)°, higher than that in non-bone grafting group [(134.5±6.7)°, (136.5±7.0)°, (137.9±9.2)° and (138.3±7.9)°]; the shoulder extension range of motion in bone grafting group was (37.1±6.3)°, (40.5±4.4)°, (43.1±3.1) ° and (46.6±4.2)°, higher than that in non-bone grafting group [(35.5±4.6)°, (37.9±5.1)°, (41.3±2.5)° and (43.9±3.1)°]; the shoulder internal rotation range of motion in bone grafting group was (50.5±3.2)°, (54.1±5.6)°, (56.6±4.2)° and (58.9±3.6)°, higher than that in non-bone grafting group [(46.9±5.1)°, (50.3±4.2)°, (53.5±2.7)° and (55.4±5.1)°]; the shoulder external rotation range of motion in bone grafting group was (52.2±3.6)°, (55.6±4.3)°, (58.7±4.4)° and (60.2±5.6)°, higher than that in non-bone grafting group [(50.1±4.7)°, (52.6±5.7)°, (55.3±3.2)° and (57.3±4.1)°] ( P<0.05 or 0.01). At 1, 6, 12 months after operation and at the last follow-up, the degree of humeral head height loss in bone grafting group was (0.8±0.1)mm, (1.1±0.2)mm, (1.4±0.3)mm and (1.6±0.3)mm, smaller than that in non-bone grafting group [(1.1±0.2)mm, (1.4±0.3)mm, (1.7±0.6)mm and (2.0±0.5)mm] ( P<0.05 or 0.01). In the two groups, the postoperative shoulder joint range of motion and degree of humeral head height loss increased significantly over time (all P<0.05). There was no significant difference in Neer score of shoulder joint between the two groups before operation ( P<0.05). At 1, 6, 12 months after operation and at the last follow-up, the Neer score of shoulder joint in bone grafting group was (80.2±5.4)points, (82.1±5.0)points, (85.4±5.8) points and (90.3±4.6)points, higher than that in non-bone grafting group [(75.6±5.1)points, (80.4±5.5)points, (83.5±2.2)points and (87.4±4.8)points] ( P<0.05 or 0.01). There was no significant difference in VAS between the two groups before operation, at 1, 6, 12 months after operation or at the last follow-up (all P>0.05). The complication rate was 11.1% (2/18) in bone grafting group and was 20.8% (5/24) in non-bone grafting group ( P<0.05). Conclusions:For comminuted proximal humeral fractures in the elderly, locking plate internal fixation combined with autogenous iliac bone grafting can accelerate fracture healing, improve shoulder joint range of motion, promote functional recovery, and reduce complications in comparison with locking plate internal fixation alone.

Objective To compare the neurologic outcome after the active abdominal compression-decompression cardiopulmonary resuscitation (AACD-CPR) and chest compression cardiopulmonary resuscitation (STD-CPR) in asphyxia cardiac arrest (CA). Methods A prospective multicenter randomized controlled trial (RCT) was conducted. Adult patients with CA because of asphyxia such as drowning, airway obstruction admitted to Zhengzhou People's Hospital and Sanmenxia Central Hospital from June 2014 to December 2017 were enrolled. With the informed consent of patients' families, patients were divided into AACD-CPR group and STD-CPR group according to random number table method. The blood from median cubital vein or basilic vein were extracted at 1, 6, 12, 24 and 48 hours after the return of spontaneous circulation (ROSC), and the levels of S100B protein and neuron-specific enolase (NSE) were detected by enzyme linked immunosorbent assay. Neurological outcome was classified according to cerebral performance classification (CPC) after 3 months. Results A total of 183 patients were selected, including 78 ROSC patients after CPR. Patients with CA > 8 minutes and rescue time > 1 hour were excluded, 69 ROSC patients (36 in STD-CPR group and 33 in AACD-CPR group) were finally included. After ROSC, the levels of S100B protein and NSE in blood of two groups were increased gradually, reaching the peak at 6 hours, and then decreased gradually. The levels of S100B protein and NSE in AACD-CPR group at different time points after ROSC were significantly lower than those in STD-CPR group [S100B protein (μg/L): 1.62±0.52 vs. 1.88±0.46 at 1 hour, 1.71±0.41 vs. 2.02±0.58 at 6 hours, 1.24±0.37 vs. 1.52±0.59 at 12 hours, 1.05±0.23 vs. 1.28±0.37 at 24 hours, 0.82±0.29 vs. 1.05±0.36 at 48 hours; NSE (μg/L):24.76±3.02 vs. 26.78±4.29 at 1 hour, 58.78±5.58 vs. 61.68±5.44 at 6 hours, 53.87±4.84 vs. 56.78±5.68 at 12 hours, 40.96±3.52 vs. 43.13±4.50 at 24 hours, 33.23±2.89 vs. 35.54±3.44 at 48 hours; all P < 0.05]. 3 months after ROSC, the CPC classification of AACD-CPR group was lower than that of the STD-CPR group (average rank: 28.86 vs. 42.46, Z = -3.375, P < 0.001). Conclusion After suffering asphyxia CA, patients who accepted AACD-CPR had better neurologic outcome than STD-CPR.

Objective:To compare the therapeutic efficacy between femoral neck system (FNS) and cannulated compression screws (CCS) in the fixation of femoral neck fractures in the elderly patients aged 65 to 75 years old.Methods:A retrospective study was conducted to analyze the data of 39 patients aged 65 to 75 years old who had been treated for femoral neck fractures at Department of Trauma Surgery, Hospital Affiliated to Qingdao University from January 2015 to September 2022. The patients were divided into 2 groups according to their internal fixation methods. In the FNS group of 18 cases subjected to FNS fixation, there were 8 male and 10 females with an age of (71.1±2.8) years. In the CCS group of 21 cases subjected to CCS fixation, there were 7 males and 14 females with an age of (70.1±2.9) years. The 2 groups were compared in terms of intraoperative fluoroscopy frequency, surgical time, intraoperative bleeding, hospitalization costs, fracture healing time, internal fixation failure, and Harris hip score, changes in neck shaft angle, and femoral neck shortening at 1 year after surgery.Results:The differences were not statistically significant in the preoperative general data or follow-up time between the 2 groups, indicating comparability ( P>0.05). In the FNS group, the intraoperative fluoroscopy frequency [(15.1±2.3) times] was significantly lower than that in the CCS group [(19.5±3.5) times], the surgical time [(49.2±5.2) minutes] was significantly shorter than that in CCS group [(62.4±11.2) minutes], and the intraoperative bleeding [(74.2±15.6) mL] and hospitalization costs [(39,928.7±1,438.3) yuan] were significantly higher than those in the CCS group [(53.1±17.3) mL and (23,527.9±2,126.3) yuan] (all P<0.05). The difference in fracture healing time was not statistically significant between the 2 groups ( P>0.05). In the FNS group, the decreased neck shaft angle (2.65°±1.66°) and femoral neck shortening (3.9±1.3 mm) were significantly smaller than those in the CCS group [4.18°±2.13° and (6.3±2.5) mm] at 1 year after surgery, and the Harris hip score [(82.2±7.2) points] was significantly higher than that in the CCS group [(76.4±5.9) points] (all P<0.05). Internal fixation failure occurred in 1 case in the FNS group and in 4 cases in the CCS group, respectively, showing no statistically significant difference ( P>0.05). Conclusions:Compared with CCS fixation, FNS fixation may lead to better therapeutic efficacy in patients with femoral neck fracture aged 65 to 75 years old. However, the risk of internal fixation failure should also be taken into consideration.

OBJECTIVE: To investigate the effect of temperature and time on the detection results of calcium and magnesium in urinary sample storage. METHODS: Urinary samples of 5 health volunteers were collected. The samples were stored in room temperature, 4 ℃ and-20 ℃ for different duration after sealed separately. A flame atomic absorption spectrometry was used to detect calcium and magnesium mass concentrations in the urinary samples. RESULTS: The variation rate of calcium and magnesium mass concentrations was <2.00% when urinary samples were stored at room temperature for 8 hours, the variation rate was <6.00% when samples were stored at 4 ℃ for 15 days, and it was <5.00% when samples were stored at-20 ℃ for 60 days. CONCLUSION: The temperature and time of urinary sample storage can affect the detection results of calcium and magnesium mass concentrations. Packing and storing samples at low temperature after collection as soon as possible is beneficial to ensure the accuracy of test results.