Objective To explore the prognostic value of early lactate clearance rate in patients with respiratory failure.Methods 117 patients with respiratory failure and elevated blood lactate, admitted into respiratory intensive care unit( RICU) between January 2010 and December 2011, were retrospectively analyzed. Arterial lactate and arterial blood gas were measured before and 12h, 24h, 48h, and 72h after treatment. Then12h lactate clearance rate was calculated. The acute physiology and chronic health evaluation Ⅱ( APACHEⅡ) score was evaluated before and after 12h treatment. The mortality were compared between subgroups with different lactate normalization time( lt;24 h, 24 ～48 h, 48 ～72 h, and gt;72h, respectively) . The clinical data was compared between subgroups with different prognosis ( survival or non-survival ) and between subgroups with different lactate clearance rate( ≥10% as high lactate clearance rate, lt;10% as low lactate clearance rate) . Results The mortality of the patients with lactate normalization time in less 24 hours was significantly lower than that of the patients with lactate normalization time more than 72 hours ( 5. 3% vs. 89. 2% , P lt; 0. 001) . The 12 hour lactate clearance rate of the survival group was significantly higher than that of the non-survival group [ ( 43. 6 ±26. 8) % vs. ( 12. 3 ±39. 1) % , P lt;0. 01] . The mortality of the patients with high lactate clearance rate was significantly lower than that of the patients with lowlactate clearance rate( 25. 8% vs. 71. 4% , P lt;0. 01) . Conclusion Early lactate clearance rate can be used as a marker for prognosis of patients with respiratory failure.
Forty critical patients with respiratory failure in the intensive care unit were randomly divided into two groups,Group A with administration of parenteral nutritino(PN) and Group B,no parenteral nutrition given.Blood gas analysis and respiratory monitoring showed that the respiratory rate,pH、PaO2、PaCO2 and HCO3- had no marked difference between the two groups.But in Group A there was a slight decrease of Pao2/FiO2 and a marked increase of A-aDO2 and the pulmonary shunt.This study indicates that the content of fat emulsion and hydrocarbon in PN may be the main factor that affects the respiratory function.
【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.
ObjectiveTo analyze the main causes and management of respiratory failure after surgery for esophageal cancer. MethodsWe retrospectively collected and analyzed the clinical data of 27 patients with respiratory failure after surgery for esophageal cancer in our hospital between January 2005 and December 2012. ResultsOf the 27 patients with respiratory failure after surgery for esophageal cancer, 23 were at advanced age, and 15 had moderately to severely impaired pulmonary function before surgery. After surgery, 19 suffered severe pulmonary infection, 8 yielded complications such as anastomotic leak, gastropleural fistula chylothorax, and postoperative bleeding. ConclusionPulmonary infections and surgical complications are the major and direct causes of respiratory failure after surgery for esophageal cancer. For high-risk patients at advanced age with impaired pulmonary function, enhancing perioperative airway management and improving surgical operation can decrease incidence of respiratory failure effectively.
ObjectiveTo compare the therapeutic effects of invasive-high-flow oxygen therapy (HFNC) and invasive-non-invasive ventilation (NIV) sequential strategies on severe respiratory failure caused by chronic obstructive pulmonary disease (COPD), and explore the feasibility of HFNC after extubation from invasive ventilation for COPD patients with severe respiratory failure.MethodsFrom October 2017 to October 2019, COPD patients with type Ⅱ respiratory failure who received invasive ventilation were randomly assigned to a HFNC group and a NIV group at 1: 1 in intensive care unit (ICU), when pulmonary infection control window appeared after treatments. The patients in the HFNC group received HFNC, while the patients in the NIV group received NIV after extubation. The primary endpoint was treatment failure rate. The secondary endpoints were blood gas analysis and vital signs at 1 hour, 24 hours, and 48 hours after extubation, total respiratory support time after extubation, daily airway care interventions, comfort scores, and incidence of nasal and facial skin lesions, ICU length of stay, total length of stay and 28-day mortality after extubation.ResultsOne hundred and twelve patients were randomly assigned to the HFNC group and the NIV group. After secondary exclusion, 53 patients and 52 patients in the HFNC group and the NIV group were included in the analysis respectively. The treatment failure rate in the HFNC group was 22.6%, which was lower than the 28.8% in the NIV group. The risk difference of the failure rate between the two groups was –6.2% (95%CI –22.47 - 10.43, P=0.509), which was significantly lower than the non-inferior effect of 9%. Analysis of the causes of treatment failure showed that treatment intolerance in the HFNC group was significantly lower than that in the NIV group, with a risk difference of –38.4% (95%CI –62.5 - –3.6, P=0.043). One hour after extubation, the respiratory rate of both groups increased higher than the baseline level before extubation (P<0.05). 24 hours after extubation, the respiratory rate in the HFNC group decreased to the baseline level, but the respiratory rate in the NIV group was still higher than the baseline level, and the respiratory rate in the HFNC group was lower than that in the NIV group [(19.1±3.8) vs. (21.7±4.5) times per minute, P<0.05]. 48 hours after extubation, the respiratory rates in the two groups were not significantly different from their baseline levels. The average daily airway care intervention in the NIV group was 9 (5 - 12) times, which was significantly higher than the 5 (4 - 7) times in the HFNC group (P=0.006). The comfort score of the HFNC group was significantly higher than that of the NIV group (8.6±3.2 vs. 5.7±2.8, P= 0.022), while the incidence of nasal and facial skin lesions in the HFNC group was significantly lower than that in the NIV group (0 vs. 9.6%, P=0.027). There was no significant difference in dyspnea score, length of stay and 28-day mortality between the two groups.ConclusionsThe efficacy of invasive-HFNC sequential treatment on COPD with severe respiratory failure is not inferior to that of invasive-NIV sequential strategy. The two groups have similar treatment failure rates, and HFNC has better comfort and treatment tolerance.
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.
Objective To investigate the therapeutic effects of biphasic positive airway pressure (Bilevel) ventilation and volume ventilation plus [VV+，including volume control plus (VC+) and volume support (VS)] on respiratory failure in patients with chronic obstructive pulmonary disease (COPD).Methods 63 patients with COPD complicated by acute respiratory failure were intubated and underwent mechanical ventilation for at least 24 hours.At the first patients were underwent assist-control (A/C) ventilation for 2 to 4 hours to obtain the suitable basic ventilatory parameters.Meanwhile，the hemodynamics and oxygen dynamic parameters were measured.Then the patients were randomly allocated to three groups with 21 patients in each group and the ventilation mode was switched to Bilevel，VC+ and A/C mode correspondingly.The setting parameter was identical in three modes.In the process of weaning，patients in Bilevel group were ventilated with Bilevel and pressure support ventilation (PSV) mode at each pressure level，and subdivided into Bilevel and PSV 1 group accordingly.In VC+ group，the mode was switched to VS and PSV mode and subdivided into VC+ group and PSV 2 group,respectively.Every mode was run for 30 minutes while the ventilation function，blood gas exchange and lung mechanics index were measured.Results In the initial stage，the airway peak pressure (PIP) of Bilevel and VC+ mode obviously decreased，and the respiratory compliance was higher compared to the A/C mode. The effectiveness of Bilevel and A/C was equivalent in improving alveolar ventilation and oxygenation.The difference in the change of circulation function and blood gas between the two groups were not significant (Pgt;0.05).In the process of weaning，the effectiveness of Bilevel and VV+ was equal to PSV.The changes of breathing mode and blood gas between the two groups had no significant differences.Conclusions Bilevel and VV+ mode ventilation can be used in the whole mechanical ventilation for acute respiratory failure due to COPD with lower PIP，higher respiratory compliance compared to A/C model and similar performance as PSV during mechanical ventilation withdrawn.
Objective To study the clinical feasibility of invasive mechanical ventilation with bilevel positive airway pressure（BiPAP） non-invasive ventilator in the stable patients needing prolonged mechanical ventilation.Methods Eleven patients with respiratory failure admitted in intensive care unit（ICU）of our department，who needed prolonged mechanical ventilation，between Jun 2004 and Nov 2007 were enrolled in the study and followed until death or Jan 2008.The arterial blood gas analysis data，length of stay(LOS)，LOS after changing to BiPAP non-invasive ventilator（Synchrony，Harmony，RESPIRONICS，VPAP III ST-A，RESMED），survival time after discharge(or fulfilled the discharge standards) were reviewed retrospectively.Results The settings of inspiratory pressure，expiratory pressure and respiratory rate of non-invasive ventilation were 21.3 (16-26) cm H2O，4 cm H2O，and 16 min-1，respectively.The LOS (or up to the discharge standard) was (91.5±50.2) days.The LOS (or up to the discharge standard) after changing to BiPAP ventilator was (23.5±12.2) days.The mean survival time after discharge (or up to the discharge standard) was (353.1±296.5) days.Four patients were still alive up to the end of the study.The arterial pH，PaCO2，PaO2，and SaO2 were not significant different before and after changing to BiPAP ventilator.Conclusion The mechanical ventilation with BiPAP non-invasive ventilator via tracheotomy tube is an alternative choice for stable patients needing prolonged mechanical ventilation.
Objective The risk factors of noninvasive positive pressure ventilation (NPPV) in the treatment of acute exacerbation of chronic obstructive pulmonary disease (AECOPD) combined with failure of respiratory failure were identified by meta-analysis, so as to provide a basis for early clinical prevention and treatment failure and early intervention. Methods PubMed, The Cochrane Library, EMbase, China National Knowledge Infrastructure, Wanfang, VIP and CBM Data were searched to collect studies about risk factors about failure of noninvasive positive pressure ventilation in AECOPD and respiratory failure published from January 2000 to January 2021. Two researchers independently conducted literature screening, literature data extraction and quality assessment. Meta-analysis was performed on the final literature obtained using RevMan 5.3 software. Results Totally 19 studies involving 3418 patients were recruited. The statistically significant risk factors included Acute Physiology and Chronic Health Evaluation (APACHEⅡ) score, pre-treatment PCO2, pre-treatment pH, Glasgow Coma Scale (GCS), respiratory rate (RR) before treatment, body mass index (BMI), age, C-reactive protein (CRP), renal insufficiency, sputum disturbance, aspiration of vomit. Conclusions High APACHE-Ⅱ score, high PCO2 before treatment, low pH value before treatment, low GCS score, high RR before treatment, low BMI, advanced age, low albumin, high CRP, renal insufficiency, sputum disturbance, and vomit aspiration were the risk factors for failure of respiratory failure in patients with COPD treated by NIPPV. Failure of non-invasive positive pressure ventilation in COPD patients with respiratory failure is affected by a variety of risk factors, and early identification and control of risk factors is particularly important to reduce the rate of treatment failure.
Objective To explore the effect of budesonide nebulization in the treatment of mechanically ventilated patients with chronic obstructive pulmonary disease(COPD).Methods A total of 25 intubated and ventilated COPD patients complicated with respiratory failure was randomly divided into two groups.The control group consisted of 12 patients received salbutamol nebulization on the routine treatment.The budesonide group consisted of 13 patients received budesonide plus salbutamol nebulization on the routine treatment.Variables such as tumor necrosis factor-α(TNF-α) and interleukin-8(IL-8) in the bronchoalveolar lavage fluid(BALF) ， incidence of ventilation-associated lung injury(VALI) ， days of mechanical ventilation ，， days of hospitalization and survival rate were measured and compared.Results The survival rate and incidence of VALI were not different significantly between the two groups.However ， the levels of TNF-α and IL-8 in BALF of the control patients were significantly lower than those in the budesonide group[ （ 1.2±0.2 ） mg/L vs （ 1.5±0.4 ） mg/L ，（ 85.7±26.5 ）（ 125.6±30.4 ）， both Plt;0.05).And the days of mechanical ventilation and hospitalization were statistically shorter in the budesonide group compared with the control group[ (7.2±2.5 ） d vs （ 10.5±6.2 ） d ， (10.5±4.7 ） d vs (15.8±6.6 ） d ， both Plt;0.05].Conclusion Our data suggest that nebulization of budesonide can suppressed the pulmonary inflammation and decreased days of the mechanical ventilation and hospitalization in mechanically ventilated COPD patients.