Objective To understand the changing patterns and characteristics of the number of patients hospitalized with acute exacerbation of chronic obstructive pulmonary disease (AECOPD) before, during, and in the post-epidemic period of the COVID-19 pandemic and the Association between acute respiratory infections and hospitalization of patients with AECOPD. Methods A retrospective analysis was conducted to count the patients hospitalized for AECOPD in the Department of Respiratory Medicine of the Third Affiliated Hospital of Chongqing Medical University from July 2017 to June 2024. The pattern of change in the number of AECOPD hospitalizations and the associations with patients with respiratory tract infections in outpatient emergency departments were analyzed. Results During the COVID-19 epidemic, the number of hospitalizations of patients with AECOPD did not increase compared with the pre-epidemic period. Instead, it significantly decreased, especially in the winter and spring peaks (P<0.05). The only exception was a peak AECOPD hospitalization in the summer of 2022. COPD inpatient mortality and non-medical discharge rates tended to increase during the epidemic compared with the pre-epidemic period. Analysis of the curve of change in the number of patients with respiratory infections in our outpatient emergency departments during the same period revealed a downward trend in the number of patients with respiratory infections during the epidemic and an explosive increase in the number of patients with respiratory infections in the post epidemic period, whose average monthly number was more than twice as high as that during the epidemic. Correlation analysis of the number of patients with respiratory infections between AECOPD hospitalizations and outpatient emergency departments showed that there was a good correlation between the two in the pre-epidemic and post-epidemic periods, and the correlation between the two in the post-epidemic period was more significant in particular (r=0.84-0.91, P<0.001).In contrast, there was no significant correlation in 2021 and 2022 during the epidemic (r=0.24 and 0.50, P>0.05 ). The most common respiratory infection pathogens among AECOPD hospitalized patients during the post-epidemic period were influenza virus, COVID-19 virus, and human rhinovirus, respectively. Conclusions The pandemic period of COVID-19 infection did not show an increase in the number of AECOPD hospitalizations but rather a trend towards fewer hospitalizations. Respiratory infections were strongly associated with the number of AECOPD hospitalizations in the pre- and post-pandemic periods, while the correlation between the two was poorer during the pandemic period. Influenza virus was the most important respiratory infection pathogen for AECOPD during the post-epidemic period.
Objective To evaluate whether respiratory training can improve motor function, exercise endurance, and activity of daily living (ADL) in stroke patients. Methods The randomized controlled trials of the effects of respiratory training on motor function, exercise endurance, and ADL in stroke patients were searched in PubMed, Embase, Google Scholar, China National Knowledge Infrastructure, Wanfang, and VIP Database. The search date was from the establishment of each database to December 2018. The control group received routine rehabilitation, medical treatment or other interventions, and the trial group added respiratory training on that basis. Outcome measures included the Fugl-Meyer Assessment (FMA), the 6-minute walk test (6MWT), and the modified Barthel Index (BI). The literature was independently screened by two investigators according to the inclusion and exclusion criteria, and the quality of the included articles was evaluated using the Physiotherapy Evidence Database scale and Cochrane Library systematic review criteria. Statistical analysis was performed using RevMan 5.3 software. Results A total of 11 articles with 741 stroke patients were included. Meta-analysis showed that in the trial group the exercise endurance [mean difference (MD)=41.50 m, 95% confidence interval (CI) (7.63, 75.37) m, P=0.02], ADL [MD=9.97, 95%CI (3.99, 15.96), P=0.001], and motor function [MD=8.00, 95%CI (1.29, 14.70), P=0.02] were improved compared with those in the control group. Subgroup analysis showed that after 8-10 weeks of intervention, BI of the trial group was higher than that of the control group [MD=25.37, 95%CI (16.49, 34.25), P<0.000 01]; after 8 weeks and 12 weeks to 3 months of intervention, FMA of the trial group was higher than that of the control group [ after 8 weeks: MD=20.40, 95%CI (9.72, 31.08), P=0.000 2; after 12 weeks to 3 months: MD=6.18, 95%CI (3.57, 8.79), P<0.000 01]. Conclusions The results of this study showed that respiratory training can improve exercise tolerance, ADL, and motor function in stroke patients. In consideration of the limited number of included articles as well as the heterogeneity among included articles in the current study, and the lack of long-term follow-up period, further studies could use more optimized respiratory training programs to conduct high-quality researches with bigger sample sizes.
Objective To study the mortality and prognostic factors of post-operative acute respiratory failure in cancer patients. Methods There were 1632 postoperative cancer patients from2004 to 2006 in the ICU of Cancer Hospital, in which 447 patients were complicated with acute respiratory failure ( intubation or tracheotomy and mechanical ventilation) . The clinical data was retrospectively analyzed. Stepwise logistic regression analysis was used to identify variables associated with mortality for acute respiratory failure. Results In 447 patients with acute respiratory failure ( male 260, female 187) , 106 cases died with a mortality of 6. 5% . Single factor analysis showed that acute morbodities ( shock, infection, organ failure) , intervention ( continuous renal replacement therapy, vasopressor drugs) , the 28-day ICU free days and APACHE scores ( ≥ 20) had significant differences between the survivor and non-survivor. Multiple logistic regression analysis showed that duration of operation( P = 0. 008, OR 1. 032, 95% CI 1. 008-1. 057) , APACHEⅡ≥20 scores( P =0. 000, OR12. 200, 95% CI 2. 896-51. 406) , organ function failure( P =0. 000, OR 13. 344,95% CI 3. 791-7. 395) were associated with mortality of acute respiratory failure. Conclusion Duration of operation, organ function failure, and APACHE Ⅱ scores were risk prognostic factors for postoperative cancer patients with acute respiratory failure.
ObjectiveTo evaluate the accuracy of the new dynamic approach in the measurement of respiratory mechanics with different pressure support (PS) level during pressure support ventilation (PSV) via oral-nasal mask.MethodsThe Respironics V60 ventilator was connected to a ASL5000 lung simulator, which simulate lung mechanics in patients with chronic obstructive pulmonary disease ［system compliance (Crs)=50 mL/cm H2O, airway resistance (Raw)=20 cm H2O/(L·s), inspiratory time (TI)=1.6 s, breathing rate=15 beats per minute］. PSV were applied with different levels of PS ［positive end-expiratory pressure=5 cm H2O, PS=5/10/15/20/25 cm H2O) and back-up rate=10 beats per minute］. Measurements were conducted at system leaks with 25 – 28 L/min. The performance characteristics and patient-ventilator asynchrony were assessed, including flow, airway pressure, time and workload. Crs and Raw were calculated by using new dynamic approach.ResultsTidal volume (VT) was increased with increasing PS level ［(281.45±4.26)mL at PS 5 cm H2O vs. (456.81±1.91)mL at PS 10 cm H2O vs. (747.45±3.22)mL at PS 20 cm H2O, P<0.01］. Severe asynchronous was occurred frequently when PS is at 25 cm H2O. Inspiration cycling criterion (CC) was up-regulated accompanied by increasing PS level ［(15.62±3.11)% at 5 cm H2O, vs. (24.50±0.77)% at 20 cm H2O, P<0.01］. Premature cycling was always existed during PSV when PS < 20 cm H2O, which could be eliminated as PS level increasing. Delay cycling was found when PS was at 20 cm H2O, and cycling delay time was (33.60±15.91)ms (P<0.01). The measurement of Crs was (46.19±1.57)mL/cm H2O with PS at 10 cm H2O, which was closer to the preset values of simulated lung. The underestimate of Crs was observed during high level PS support. The calculation of inspiratory and expiratory resistance was approximate to 20 cm H2O/(L·s) when PS level was exceeded 15 cm H2O.ConclusionsThe new dynamic approach can continuously assess the respiratory mechanics during non-invasive ventilation, which is no need to interrupt the patient's spontaneous breathing. Higher inspiratory flow during PSV is beneficial for Raw measurement, whereas the accuracy of Crs was influenced by the value of actual VT.
【Abstract】 Objective To analyze the lung pathological features of type A H1N1 influenza and respiratory failure. Methods The data of imaging and aspiration lung biopsy of five patients with type A H1N1 influenza and respiratory filure since October 2009 were retrospectively analyzed. Results Common clinical manifestations of patients with type A H1N1 influenza and respiratory failure were rapid progress of illness after common cold-like symptoms with high fever, dyspnea, severe hypoxemia, large amounts of bloody sputum, wet rales over both lungs, and with other organs involved or even septic shock. Early lung pathological features were inflammatory exudate in alveoli and lung interstitium, infiltration of inflammatory cells, and extensive hemorrhage. Middle and late pathological features were hyperplasia of alveolar epithelial,disconnection of alveolar septa, replaced of alveolar spaces by fibrosis. Conclusions The pathology of patients with type A H1N1 influenza and respiratory failure is similiar with ARDS. Development of treatment strategies targeted to pathological characteristics of ARDS caused by type A H1N1 influenza is of greatsignificance for effective and timely treatment.
Objective To explore the efficacy of humidified high flow nasal cannula ( HHFNC) for respiratory failure after ventilator weaning in post-operative newborns and infants with congenital heart disease. Methods FromJanuary 2010 to August 2010, 33 newborns and infants [ ( 7. 8 ±8. 4) months, range 3 days to 36 months; weight ( 6. 6 ±3. 6) kg, range 2. 2 to 19. 6 kg] were treated with HHFNC ( 22 cases) and routine oxygen therapy ( 11 cases) for respiratory failure following ventilator weaning after operation of congenital heart disease. Symptoms, blood oxygen saturation ( SpO2 ) , partial pressure of oxygen( PaO2 ) , partial pressure of carbondioxide ( PaCO2 ) , incidence rate of re-intubation, duration of ICU, and hospital stay were assessed and compared between the HHFNC group and the routine oxygen therapy group.Results There were no statistical significance in the duration of ICU, hospital stay, duration of mechanical ventilation, or infection rate between the HHFNC group and the routine oxygen therapy group ( P gt; 0. 05) . But the incidence rate of re-intubation was lower in the HHFNC group than that in the routine oxygen therapy group. Meanwhile SpO2 and PaO2 increased and PaCO2 decreased significantly in the HHFNC group ( P lt;0. 05) . Conclusion HHFNC shows a clinical improvement rapidly and efficiently in preventing respiratory failure after ventilator weaning in post-operative newborns and infants with congenital heart disease.
ObjectiveTo systematically review the protective effect of serum maternal respiratory syncytial virus (RSV) antibodies on infants with RSV infection. MethodsPubMed, EMbase, The Cochrane Library, CBM, CNKI and WanFang Data databases were electronically searched to collect observational studies on the correlation between serum maternal RSV antibodies and infants with RSV infection from inception to July 18, 2021. Two reviewers independently screened literature, extracted data and assessed the risk of bias of the included studies, then, qualitative analysis was performed. ResultsA total of 19 studies were included, and 60% of those studies suggested that a higher level of maternal antibodies could prevent RSV infection. However, the remaining 40% of them showed that there was no significant difference in the level of RSV maternal antibodies between the infected group and the non-infected group. Further more, in the studies of the correlation between maternal antibody level and disease severity after RSV infection, 55% of those showed that maternal antibody level was negatively correlated with disease severity. ConclusionThe protective effect of serum maternal RSV antibodies on infants reported in different studies varies. Whether it can prevent RSV infection and affect the severity of RSV infected children still needs to be explored.
ObjectiveTo investigate the application value of modified gastric tube in surgery for mid- and lowerthoracic esophageal cancer compared with gastric tube. MethodsA total of 221 patients with mid- and lower-thoracic esophageal cancer who underwent esophagectomy between October 2009 and June 2013 in our hospital were recruited in the study. They were randomly divided into a modified gastric tube group (n=108) and a gastric tube group (n=113). There were 67 males and 41 females at age of 63.50±6.75 years (ranged 47-73 years) in the modified gastric tube group, including 62 cases of middle esophageal cancer and 46 cases of lower esophageal cancer. There were 69 males and 44 females at age of 63.38±7.21 years (ranged 49 to 76 years) in the gastric tube group, including 68 cases of middle esophageal cancer and 45 cases of lower esophageal cancer. The results of surgery and morbidities were recorded. The respiratory functions were recorded at 3 days before surgery, 1 week and 4 weeks after surgery, respectively. ResultsAll surgeries were successfully performed in two groups. There was 1 case of death and 1 case of anastomotic leakage in the gastric tube group. There was no death or anastomotic leakage occurred in the modified gastric tube group. There was statistical difference in the operation time between the modified gastric tube group and the gastric tube group (150.65±11.88 min vs. 174.58±11.99 min, P<0.05). There were no statistical differences in the amount of bleeding during operation or the length of hospital stay between two groups (P>0.05). There were no statistical differences in respiratory function between two groups at 1 week or 4 weeks after surgery (P>0.05). ConclusionFor patients with mid- and lower-thoracic esophageal cancer, modified gastric tube has a good clinical application value compared with gastric tube. It is easy and safe, and can decrease the operation time without aggravation of pulmonary function after operation. It is a better esophagus reconstruction method in esophagectomy for mid- and lower-thoracic esophageal cancer in primary hospitals.
ObjectiveTo investigate the correlation between compliance of clinical respiratory bundle and duration of mechanical ventilation. MethodsThe data of patients who admitted to intensive care unit (ICU)of Cancer Hospital Chinese Academy of Medical Sciences between June 2013 and December 2014 were retrospectively reviewed and analyzed.The patients with respiratory insufficiency who ventilated more than 48 hours were included into the study. ResultsFifty-five patients were enrolled into the final analysis.There were 43 males and 12 females with a mean age of 63.47±12.49 years.The mean sequential organ failure assessment (SOFA)score was 2.8±2.2,and the mean simplified acute physiology score 3 (SAPS3)was 51±14 on ICU admission.The mean duration of mechanical ventilation of all 55 patients was 7.3±5.5 days.The compliance of low tidal volume strategy was 23.6%(13/55).No significant difference was found on duration of mechanical ventilation between the patients who was compliant with low tidal volume strategy and the patients who was not compliant (7.31±7.02 days vs. 7.31±5.07 day,P=0.444).A negative correlation between compliance of protocolized sedation strategy and duration of mechanical ventilation was found by Bivariate spearman correlation analysis (r2=0.312,P<0.001).A negative correlation between compliance of spontaneous awakening trial strategy and duration of mechanical ventilation (r2=0.337,P<0.001)and a negative correlation between compliance of spontaneous breathing trial strategy and duration of mechanical ventilation (r2=0.280,P<0.001)were also found by Bivariate spearman correlation analysis.Multiple linear regression analysis showed that only spontaneous awakening trial strategy was correlated with duration of mechanical ventilation(B=-0.623,P<0.001). ConclusionThe more compliance with clinical respiratory bundle,especially with spontaneous awakening trial strategy,the shorter of duration of mechanical ventilation.The effect of low tidal volume strategy on the duration of mechanical ventilation needs further studies.
Objective To evaluate the influence of early mobilization on delirium and respiratory dynamics in mechanically ventilated patients with acute exacerbation of chronic obstructive pulmonary disease (AECOPD). Methods The study prospectively recruited 107 AECOPD patients who admitted between January 2014 and June 2015 and underwent mechanical ventilation.On basis of same routine treatment,the patients were randomly divided into a treatment group (54 cases)receiving regime of early mobilization,and a control group (53 cases)receiving routine sedation and analgesia treatment.The incidence of delirium,duration of delirium,time of mechanical ventilation,and ICU mortality were compared between two groups.The respiratory mechanical parameters including endogenous positive end expiratory pressure (PEEPi),airway resistance(Raw),static compliance(Cs),and dynamic compliance(Cd)before treatment,3 days and 5 days after treatment were also compared between two groups. Results Compared with the control group,the incidence of delirium decreased (59.3% vs. 77.4%),the duration of delirium [(1.8±1.1)d vs. (2.6±1.3)d] and mechanical ventilation[(6.2±3.4)d vs. (7.9±4.2)d] reduced in the treatment group with significant difference(P<0.05).There was no significant difference in respiratory mechanical parameters before treatment between two groups(P>0.05).While at 3 days and 5 days after treatment,PEEPi decreased [(6.23±2.83)cm H2O vs. (7.42±2.62)cm H2O,(4.46±2.20)cm H2O vs. (5.92±2.51)cm H2O],Raw decreased [(20.35±7.15)cmH2O·L-1·s-1 vs. (23.23±6.64)cm H2O·L-1·s-1,(16.00±5.41)cm H2O·L-1·s-1 vs. (19.02±6.37)cm H2O·L-1·s-1],Cd increased [(25.20±9.37)mL/cm H2O vs (21.75±7.38)mL/cm H2O,(27.46±5.45)mL/cm H2O vs. (24.40±6.68)mL/cm H2O] in the treatment group compared with the control group(P<0.05),and the difference in Cs was not significant(P>0.05).No complications such as slippage,physical injury,or malignant arrhythmia occurred in two groups.The mortality slightly decreased in the treatment group compared with the control group (5.6% vs 11.3%),but the difference was not statistically significant(P>0.05). Conclusions The incidence of delirium is high in mechanically ventilated patients with AECOPD.Early mobilization can reduce the incidence and duration of delirium,decrease the airway resistance,increase the dynamic lung compliance,relieve dynamic pulmonary hyperinflation and reduce PEEPi,so as to improve the respiratory function and shorten the time of mechanical ventilation.Therefore,early mobilization is an effective and safe regime for AECOPD patients underwent mechanical ventilation.