Objective:To evaluate our self-made distraction reductor used in the percutaneous minimally invasive treatment of calcaneal fractures.Methods:A retrospective study was conducted of the 32 patients (37 feet) who had been treated at Department of Orthopaedics, The First Affiliated Hospital to Chongqing Medical University from January 2017 to December 2019 for calcaneal fractures. They were 26 males and 6 females, aged from 20 to 67 years (average, 46.5 years). The height and length of the calcaneus were restored by our self-made tri-plane distraction reductor in all patients; the displaced fracture blocks were reset in a minimally invasive manner in patients with intra-articular fracture; final fixation was performed with a minimally invasive plate and screws. Time for reductor installation, operation time and intraoperative blood loss were recorded; complications, fracture union and reduction were observed; height, length and width of the calcaneus, ankle-hindfoot scores of American Society of Foot and Ankle Surgery (AOFAS), Maryland scores, and visual analogue scale (VAS) were recorded at the last follow-up; B?hler and Gissane angles were compared between pre- and post-operation.Results:All patients were followed up for 12 to 36 months (average, 17.2 months). Time for reductor installation averaged 5.0 min (from 3 to 8 min), operation time 91.5 min(from 70 to 110 min), and intraoperative blood loss 25.2 mL (15 to 50 mL). Superficial infection of traction track occurred in one patient and sural nerve injury in one patient. All fractures united without any reduction loss by the last follow-up. On average, the last follow-up observed a calcaneal height of 39.3 mm, a calcaneal length of 70.6 mm, a calcaneal width of 32.7 mm, an AOFAS score of 87.8, a Maryland score of 86.7 and a VAS score of 2.2. The calcaneal B?hler angle was recovered significantly from 3.7°±13.7° preoperatively to 25.8°±6.4° at the last follow-up, and the calcaneal Gissane angle from 112.2°±21.3° preoperatively to 125.8°±5.7° at the last follow-up ( P< 0.05). Conclusion:In percutaneous minimally invasive treatment of calcaneal fractures, application of our self-made tri-plane distraction reductor can lead to fine clinical efficacy.

Objective To evaluate the different effects of laryngeal mask and mask ventilation during bronchoscopy in elder patients. Methods 120 old patients (ASA I-III) were divided into three group according to the table of random number as following:surface anesthesia with autonomous respiration (group I);endoscope mask ventilation (group II);laryngeal mask airway ventilation (group III). Oxygen inhalation through nasal tube in groupⅠ,group II and group III was ventilated with endoscope mask and LMA respectively ,thenwe observed whether there were adverse effects or not during the procedure. Results The adverse reactions of group I were more than other groups. Compared with the group I, variance of MAP,HR, RR, SpO2 in the groupⅡand groupⅢ had less changes, the cases with severe bucking decreased significantly, and satisfaction degree increased markedly, (P <0.01or P<0.05 ) . The incidence rate of resp iratory depression and airway obstruction in groupⅡwas higher than that in groupⅢ (P<0.05). Conclusion Endoscope mask ventilation and LMA can both be adopted in analgesia bronchoscopy for old patient. LMA under general anesthesia to transbronchial lung biopsy would control respiration according to the demand at any time.LMA has more advantage in the operation for the stable respiration and hemodynamics and less complications.

Objective To evaluate the clinical outcomes of lumbopelvic fixation of vertically unstable Tile type C pelvic fractures combined with complex sacral fractures.Methods A prospective study was made on 21 cases of vertically unstable type C pelvic fractures combined with complex sacral fractures admitted between May 2014 and December 2015.There were 10 males and 11 females, with a mean age of 35.9 years (range, 14-59 years).Tile classification of pelvic fractures was type C1 in five cases, type C2 in four and type C3 in 12.Denis classification of sacral fractures was zone I in five cases, zone Ⅱ in seven and zone Ⅲ in nine.Twelve cases had neurological deficits.Operation time, intraoperative blood loss, bone healing time, pelvis vertical displacement and postoperative complications were recorded.Vertical displacement and functional outcome were assessed by Matta method and Majeed score respectively.Results All cases were followed up for (12.5±5.4)months (range, 7-26 months).Operation time was (108.0±49.4) min (range, 64-225 min).Intraoperative blood loss was 150-3 000 ml[400(225-500)ml].All fractures were healed at (19.0±4.6) weeks (range, 15-32 weeks).Vertical displacement of the pelvis was (8.76±5.46)mm (2.54-21.80 mm) before operation and (4.20±3.22)mm (0-12.57 mm) after lumbopelvic fixation (P<0.05), showing the reduction distance of-4.45-17.86 mm [4.09(1.74-5.58)mm].According to the Matta method, the results were excellent in 13 cases, good in six, and fair in two, with the excellent and good rate of 90%.Majeed score evaluation at last follow-up was 51-98 points and the results were excellent in nine cases, good in nine, fair in two and poor in one, with the excellent and good rate of 86%.Deep infection occurred in two cases who were cured by debridement and antibiotics, and the internal instruments of the two cases were removed after fracture healing.Screw loosening occurred in five cases with no evidence of screw breakage.Four cases complained of foreign body sensation and discomfort in sacral area due to the prominence of the iliac hardware.Four cases had limited range of motion of the lumbar spine, especially in anterior flexion range, and lumbar range of motion was recovered in three of them after removal of the internal fixator.Conclusion Lumbopelvic fixation can restore vertical stability of the pelvis, but removal of the internal fixator is suggested after fracture healing due to the high rate of screw loosening.

Objective To analyze the structures and molecular weight distributions of the capsular polysaccharides from 6 serotypes of pneumococcus .Methods The structures of pneumococcal capsular pol-ysaccharides of 6 serotypes were analyzed by 1 H nuclear magnetic resonance ( NMR) .Chemical shifts of all characteristic protons were investigated to analyze polysaccharide integrity and inter -assay consistency .High performance size exclusion chromatography-multi angle laser light scattering ( HPSEC-MALLS) was used to measure the molecular weights .Results The chemical shifts of all characteristic protons of the pneumococ-cal capsular polysaccharides of 6 serotypes were consistent with the standard chemical shift .The weight-aver-age molecular mass of the pneumococcal capsular polysaccharides ranged from 7.182×104 g/mol(for serotype 19A) to 1.273×106 g/mol(for serotype 9V)examined by HPSEC-MALLS.Conclusion The structures and molecular weight distributions of pneumococcal capsular polysaccharides could be rapidly and effectively ana -lyzed by 1 H NMR and HPSEC-MALLS.Moreover, C-PS and acetate contained in capsular polysaccharides could also be detected .HPSEC-MALLS is an applicable method for the quantitative analysis of molar mass distributions in different serotypes of pneumococcal capsular polysaccharides . Although 1 H NMR and HPSEC-MALLS have been accepted as the quality control measurements by WHO , to use them as the re-placements of the traditional QC method still needs further investigation .

Objective: To discuss the clinical outcomes of treating delayed acetabular fractures by combined anterior and posterior approach. Methods: A retrospective analysis was conducted of 31 delayed acetabular fractures from February 2012 to February 2017 in the First Affiliated Hospital of Chongqing Medical University, including 18 males and 13 females with age of 48.5 years(23 to 67 years) .The injury to the operation time was 35.9 days(22 to 183 days). Of these 31 cases, there were 6 cases of transverse and posterior wall fracture, 8 cases with anterior column+ posterior half transverse fracture, 12 cases with double column fracture and 5 cases of "T" type fracture according to Letournel-Judet classification.All fractures were treated combined anterior and Kocher-Langenbeck approaches, including 13 cases of ilioinguinal approach+ Kocher-Langenbeck(K-L approach), 4 cases of extensile acetabular approach, 7 cases of stoppa approach + K-L approach and 7 cases of side rectus femoris approach.Correlation was analyzed by Pearson correlation regression testing. Results: Follow up to August 2017, all patients were followed up with 36.0 months(from 6 to 55 months). As calculated, the restorational effect was positively with result of the X-ray film and the clinical effect(r=0.823, 0.856; both P<0.05). The evaluation was conducted with Matta′s reduction criteria: there were 11 cases classified as anatomic reduction(35.5%), 13 cases as satisfactory reduction(41.9%), and 7 cases as unsatisfactory reduction(22.6%). Excellent and good rate was 77.4%. Functional reductions were categorized by the standard of Matta hip score: 8 excellent cases(25.8%), 11 good cases(35.5%), 8 fail cases(25.8%), and 4 poor cases(12.9%). Conclusion The treatment of delayed acetabular fracture by combined anterior and posterior approach can fully exposure the anterior and posterior acetabular fcloumns, which is beneficial to the release and fixation of the old acetabular fractures.

Objective:To compare the clinical outcomes of percutaneous screw fixation at the key points using a self-made calcaneal distraction device with traditional open reduction plate internal fixation for the treatment of patients with displaced intra-articular calcaneal fractures (DIACFs).Methods:A retrospective case-control study was made on clinical data of 60 patients (69 feet) with DIACFs admitted to First Affiliated Hospital of Chongqing Medical University between January 2015 and January 2019. There were 51 males and 9 females, with an average age of 47.2 years [(47.2±8.7)years]. According to the Sanders classification, there were 42 feet of type II, 15 feet of type III and 12 feet of type IV. According to the Essex-Lopresti classification, there were 43 feet of tongue type fractures and 23 feet of joint depression fractures. Another 3 feet were not applicable to this classification system. In Group A, 30 patients (35 feet) were treated by percutaneous reduction or reduction using tarsal sinus approach with the self-made calcaneal distraction device followed by percutaneous screw fixation. In Group B, 30 patients (34 feet) were treated by open reduction and internal fixation with plates using the traditional extended lateral approach. Waiting time for surgery, operation time, length of hospital stay, efficacy of reduction and fracture healing, American Orthopedic Foot and Ankle Society (AOFAS) score, Maryland score, visual analog scale (VAS), and incidence of surgical site related complications were compared between groups. The efficacy of reduction was evaluated by measuring the height, length and width as well as the B?hler angle of the calcaneus.Results:All patients were followed up for an average of 28.2 months [(28.2±11.3)months]. The waiting time for surgery in Group A was (3.4±1.3)days, significantly shorter than that in Group B [(6.9±1.9)days] ( P<0.05). The operation time was (91.7±10.3)minutes in Group A and (92.8±11.5)minutes in Group B ( P>0.05). The length of hospital stay in Group A was (7.0±1.4)days, significantly shorter than that in Group B [(12.7±1.7)days] ( P<0.05). At the final follow-up, all fractures were healed, with no reduction loss of fixation observed. The height of the calcaneus was (48.9±2.0)mm in Group A and (49.3±2.6)mm in Group B ( P>0.05). The length of the calcaneus was (83.2±2.9)mm in Group A and (83.5±2.7)mm in Group B ( P>0.05). The width of the calcaneus was (35.8±2.3)mm in Group A and (35.1±1.3)mm in Group B ( P>0.05). The B?hler angle of the calcaneus was (24.7±6.4)° in Group A and (25.9±5.8)° in Group B ( P>0.05). At the final follow-up, the AOFAS score was (87.1±8.5)points in Group A and (86.7±7.8)points in Group B, with the good and excellent rate of 89% (31/35) and 88% (30/34) respectively ( P>0.05). The Maryland score was (85.3±9.5)points in Group A and (84.9±9.5)points in Group B, with the good and excellent rate of 86% (30/35) and 85% (29/34), respectively ( P>0.05). The VAS was (2.3±1.5)points in Group A and (2.5±1.5)points in Group B ( P>0.05). No surgical site related complication was observed in Group A. While in Group B, there was one foot of superficial incision infection, three necrosis of the skin at the edge of the incision, and one deep infection ( P<0.05). Conclusions:For the treatment of DIACFs, percutaneous screw fixation at the key point using the self-made calcaneal distraction device can achieve the same clinical outcome as traditional open reduction plate internal fixation, but it has advantages like significant shorter waiting time for surgery, less invasiveness, faster recovery and lower incidence of incision-related complications. This method is especially suitable for patients with contraindications of open reduction and internal fixation.

Objective: To evaluate the intervention effects of response to heatwave in communities of four cities, China. Methods: Baseline survey on heatwave and climate change related knowledge, attitude and practice (KAP) was conducted in the pilot communities in Harbin, Nanjing, Shenzhen and Chongqing, using face-to-face questionnaire interview in November, 2011 to November, 2013. Finally, 1 604 residents were interviewed. Intervention measures were implemented in summers of 2013 and 2014, including delivering early warning information of heatwave health risk and launching health education and promotion. The second survey was conducted in same communities using the same questionnaire and sampling method as baseline survey in November, 2014, and 1 640 residents were interviewed. The Chi-square test was used to compare the demographic characteristics and KAP of community residents between before and after intervention, and the factors that affected the intervention effect were selected by logistic multiple stepwise regression model. Results: The age of the residents interviewed before and after intervention was (46.4 ± 15.5) years and (45.0 ± 15.9) years, respectively. Overall, the residents' awareness rates of heatwave before and after intervention were 70.5% (1 131/1 604) and 82.9% (1 359/1 640) (χ²=69.40, P<0.001). The rate of residents who had wished to receive early warning information increased 6.3% (χ²=41.11, P<0.001), which reached 94.6% (1 551/1 604) after intervention from 88.3% (1 416/1 604) in baseline survey. Both heatwave health risk early warning and health education had big impacts to residents. There were 92.7% (1 105 residents) among the 1 192 residents who had received the early warning information arrange work and rest time according to the early warning information and 93.0% (1 231 residents) among the 1 323 residents who knew about health education activities being conducted in community thought that the community health education activities had made active role in protecting health from heatwaves. After a series of intervention, male had a effect on attitude about hot wave than female in Nanjing and Chongqing, OR (95%CI) were 1.48(1.02-2.16) and 1.45 (1.18-2.05) , respectively; compared with subjects below primary school education, people with college degree or above had higer KAP in all cities (ORs range from 1.18 to 2.05), P<0.05; regular physical exercise (ORs range from 1.39 to 2.70) also had profound impacts on KAP in all cities (P<0.05). Conclusion s Early warning and health education were effective measures to enhance residents' response capacity to climate change.

Objective To understand the status quo of nutrition working ability in primary medical and health institutions of Chongqing City.Methods Three primary medical institutions were randomly extracted from each of 39 districts and counties of Chongqing City,and Primary Nutrition Service Capacity Survey Form and Nutrition Work Capacity Survey System were adopted to conduct the questionnaire survey.Then the sur-vey results were analyzed.Results A total of 117 primary medical institutions were surveyed,in which 86 in-stitutions(73.50％)undertook the nutritional work.The number of engaging the nutrition full-time work in the units was 0(0,0).Among the nutritional staff,the age in 164 persons was 30-＜40 years old,accounting for 48.38％,180 persons(53.10％)had the primary title,232 persons(68.44％)had the bachelor degree,287 persons(84.66％)had the medical related background,but only 2 persons had the nutritional related profes-sional background.There were 57(48.72％),75(64.10％),77(65.81％)primary medical institutions in carry-ing out the nutrition and health management of pregnant women,children aged 0-6 years old and elderly peo-ple,34 institutions(29.10％)in carrying out nutritional monitoring,and 17 institutions(14.50％)had the clinical nutrition work ability.Compared with the villages and towns,the proportion of urban area primary medical institutions in carrying out the blood routine items in children aged 0-6 years old,hemoglobin,blood routine and urine routine items in elderly people was higher,the number of published popular science works on nutrition was more,and the differences were statistically significant(P＜0.05).Conclusion The nutrition work system of primary medi-cal institutions in Chongqing City is temporarily imperfect,the specialized persons still lack and the nutritional health service level needs to be further strengthened.

Objective To understand the associations between extremely low and high air temperature and the years of life lost (YLL) due to diabetes deaths in Chongqing and Harbin with different climatic characteristics in China.Methods A double threshold B-spline distributed lag non-linear model (DLNM) was used to investigate the lag and cumulative effects of extremely low and high air temperature on YLL due to diabetes for lag 0-30 days by using the urban meteorological and diabetes mortality data of Chongqing (2011-2013) and Harbin (2008-2010).The effects were expressed as relative risk (RR).Results In Chongqing,the cold effects on YLL due to diabetes were delayed by four days and lasted for three days (lag4-6) with the highest RR of 1.304 (95％ CI:1.033-1.647) at lag5.The hot effects were delayed by one day (lagl) with RR of 1.321 (95％ CI:1.061-1.646).In Harbin,the extreme cold effects on YLL were delayed by four days and lasted for seven days (lag4-10) with the highest RR of 1.309 (95％CI:1.088-1.575) at lag6.The hot effects were delayed by one day and lasted for four days (lagl-4) with the highest RR of 1.460 (95％ CI:1.114-1.915) at lag2.The unit risk for cold and hot effects was 43.7％ (P=0.005 5) and 18.0％ (P=0.000 2) in Chongqing and 15.0％ (P=0.000 8) and 29.5％(P=0.001 2) in Harbin,respectively.Conclusions Both extremely low air temperature and extremely high air temperature might increase the years of life lost due to diabetes in cities with different climate characteristics.Health education about diabetes prevention should provide information about the effects of extreme weather events.

Objective To investigate the impact of dietary protein intake on the prevalence of type 2 diabetes in adult residents, and to provide a reference for formulating diabetes prevention and control measures. Methods The research was based on cross-sectional survey data from the Nutrition and Health Follow-up Study of Chinese Residents in Chongqing (2021). Energy and nutrient intake was calculated in combination with the Chinese food composition table. Multivariate logistic regression was used to analyze the association between dietary protein and diabetes, and then restricted cubic spline regression (RCS) was used to analyze the dose-response relationship between dietary protein intake and the development of diabetes. Results Among the 1 415 adult residents, dietary intake of total protein, animal protein, and plant protein was 69.69g/d, 26.26g/d, and 43.43g/d, respectively. The ratio of protein to energy supply was 14.31%, and the prevalence of diabetes was 18.02%. Comparing with the residents in the first percentile of total dietary protein intake, the multivariable-adjusted odds ratios of those in the second and third percentile were 1.754 and 2.453 respectively. Comparing the residents in the third percentile with those in the first percentile, the multivariable-adjusted odds ratios of diabetes were 1.592 for protein energy supply ratio, and 1.558 for animal protein intake. Conclusion High protein intake, high protein energy supply ratio and high animal protein intake may increase the risk of diabetes, and different types of protein may have different effects on diabetes.