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The Cochrane Database of Systematic... Oct 2017Damage caused by lung overdistension (volutrauma) has been implicated in the development of bronchopulmonary dysplasia (BPD). Modern neonatal ventilation modes can... (Meta-Analysis)
Meta-Analysis Review
BACKGROUND
Damage caused by lung overdistension (volutrauma) has been implicated in the development of bronchopulmonary dysplasia (BPD). Modern neonatal ventilation modes can target a set tidal volume as an alternative to traditional pressure-limited ventilation (PLV) using a fixed inflation pressure. Volume-targeted ventilation (VTV) aims to produce a more stable tidal volume in order to reduce lung damage and stabilise the partial pressure of carbon dioxide (pCO).
OBJECTIVES
To determine whether VTV compared with PLV leads to reduced rates of death and death or BPD in newborn infants and to determine whether use of VTV affected outcomes including air leak, cranial ultrasound findings and neurodevelopment.
SEARCH METHODS
We used the standard search strategy of Cochrane Neonatal to search the Cochrane Central Register of Controlled Trials (CENTRAL 2016, Issue 12), MEDLINE via PubMed (1966 to 13 January 2017), Embase (1980 to 13 January 2017) and CINAHL (1982 to 13 January 2017). We also searched clinical trials databases, conference proceedings and the reference lists of retrieved articles for randomised controlled trials and quasi-randomised trials. We contacted the principal investigators of studies to obtain supplementary information.
SELECTION CRITERIA
Randomised and quasi-randomised trials comparing VTV versus PLV in infants of less than 44 weeks' postmenstrual age and reporting clinically relevant outcomes.
DATA COLLECTION AND ANALYSIS
We assessed risk of bias for each trial using Cochrane methodology. We evaluated quality of evidence for each outcome using GRADE criteria. We tabulated mortality, rates of BPD, short-term clinical outcomes and long-term developmental outcomes.
STATISTICS
for categorical outcomes, we calculated typical estimates for risk ratios (RR), risk differences (RD) and number needed to treat for an additional beneficial outcome (NNTB). For continuous variables, we calculated typical estimates for mean differences (MD). We used 95% confidence intervals (CI) and assumed a fixed-effect model for meta-analysis.
MAIN RESULTS
Twenty randomised trials met our inclusion criteria; 16 parallel trials (977 infants) and four cross-over trials (88 infants). No studies were blinded and the quality of evidence for outcomes assessed varied from moderate to low.We found no difference in the primary outcome, death before hospital discharge, between VTV modes versus PLV modes (typical RR 0.75, 95% CI 0.53 to 1.07; low quality evidence). However, there was moderate quality evidence that the use of VTV modes resulted in a reduction in the primary outcome, death or BPD at 36 weeks' gestation (typical RR 0.73, 95% CI 0.59 to 0.89; typical NNTB 8, 95% CI 5 to 20) and the following secondary outcomes: rates of pneumothorax (typical RR 0.52, 95% CI 0.31 to 0.87; typical NNTB 20, 95% CI 11 to 100), mean days of mechanical ventilation (MD -1.35 days, 95% CI -1.83 to -0.86), rates of hypocarbia (typical RR 0.49, 95% CI 0.33 to 0.72; typical NNTB 3, 95% CI 2 to 5), rates of grade 3 or 4 intraventricular haemorrhage (typical RR 0.53, 95% CI 0.37 to 0.77; typical NNTB 11, 95% CI 7 to 25) and the combined outcome of periventricular leukomalacia with or without grade 3 or 4 intraventricular haemorrhage (typical RR 0.47, 95% CI 0.27 to 0.80; typical NNTB 11, 95% CI 7 to 33). VTV modes were not associated with any increased adverse outcomes.
AUTHORS' CONCLUSIONS
Infants ventilated using VTV modes had reduced rates of death or BPD, pneumothoraces, hypocarbia, severe cranial ultrasound pathologies and duration of ventilation compared with infants ventilated using PLV modes. Further studies are needed to identify whether VTV modes improve neurodevelopmental outcomes and to compare and refine VTV strategies.
Topics: Bronchopulmonary Dysplasia; Humans; Infant, Newborn; Infant, Premature; Intermittent Positive-Pressure Ventilation; Pressure; Randomized Controlled Trials as Topic; Tidal Volume
PubMed: 29039883
DOI: 10.1002/14651858.CD003666.pub4 -
European Respiratory Review : An... Jun 2023Deep learning (DL), a subset of artificial intelligence (AI), has been applied to pneumothorax diagnosis to aid physician diagnosis, but no meta-analysis has been... (Meta-Analysis)
Meta-Analysis Review
BACKGROUND
Deep learning (DL), a subset of artificial intelligence (AI), has been applied to pneumothorax diagnosis to aid physician diagnosis, but no meta-analysis has been performed.
METHODS
A search of multiple electronic databases through September 2022 was performed to identify studies that applied DL for pneumothorax diagnosis using imaging. Meta-analysis a hierarchical model to calculate the summary area under the curve (AUC) and pooled sensitivity and specificity for both DL and physicians was performed. Risk of bias was assessed using a modified Prediction Model Study Risk of Bias Assessment Tool.
RESULTS
In 56 of the 63 primary studies, pneumothorax was identified from chest radiography. The total AUC was 0.97 (95% CI 0.96-0.98) for both DL and physicians. The total pooled sensitivity was 84% (95% CI 79-89%) for DL and 85% (95% CI 73-92%) for physicians and the pooled specificity was 96% (95% CI 94-98%) for DL and 98% (95% CI 95-99%) for physicians. More than half of the original studies (57%) had a high risk of bias.
CONCLUSIONS
Our review found the diagnostic performance of DL models was similar to that of physicians, although the majority of studies had a high risk of bias. Further pneumothorax AI research is needed.
Topics: Humans; Pneumothorax; Artificial Intelligence; Deep Learning; Sensitivity and Specificity; Diagnostic Imaging
PubMed: 37286217
DOI: 10.1183/16000617.0259-2022 -
Pakistan Journal of Medical Sciences 2022COVID-19 patients develop Life-threatening complications like pneumomediastinum/pneumothorax and emphysema which might experience prolonged hospital stays and additional... (Review)
Review
OBJECTIVES
COVID-19 patients develop Life-threatening complications like pneumomediastinum/pneumothorax and emphysema which might experience prolonged hospital stays and additional costs might be imposed on the patient and the health system. The clinical features and outcomes of mechanically ventilated patients with COVID-19 infection who develop a pneumothorax, pneumomediastinum and subcutaneous emphysema has not been rigorously described or compared to those who do not develop these complications. So a systematic review of studies conducted on this subject was carried out to better manage these complications by investigating the underlying factors in COVID-19 patients.
METHODS
The search was conducted between early January and late December 2020 in databases including PubMed, Scopus, ProQuest, Embase, Cochrane Library, and Web of Science, using the following keywords and their combinations: COVID-19 Complication, Pneumothorax, Pneumomediastinum, Pneumopericardium, and Subcutaneous Emphysema. The extracted studies were screened separately by two researchers based on the PRISMA statement. After eliminating the duplicate studies, the title, abstract, and full text of the remaining studies were reviewed. Disagreements in the screening and selection of the studies were resolved by consensus or through a third-party opinion.
RESULTS
A total of 793 articles were retrieved through the literature search, and 99 studies conducted on a total of 139 patients were finally included The patient mortality was found to have a significant relationship with positive pressure ventilation (P=0.0001). There was no significant relationship between the patients' death and chest tube insertion (P=0.2) or between the interval of time from the onset of symptoms to the diagnosis of pneumothorax (P=0.7). The mean age was higher in the deceased cases, and the mean difference observed was statistically significant (P=0.001).
CONCLUSION
With the expansion of our clinical understanding of COVID-19, recognition of the uncommon complications of COVID-19 especially pneumothorax is crucial. Although in our review we couldn't find a causal relationship between COVID-19 and pneumothorax or association between pneumothorax and death, as it is limited by many variables such as included studies' design, or incomplete outcome data especially more information about the associated risk factors, we recommend performing more well-designed studies to describe the pneumothoraxes' incidence, risk factors, and outcomes in COVID-19 patients.
PubMed: 35480506
DOI: 10.12669/pjms.38.3.5529 -
Journal of Minimally Invasive Gynecology Jan 2020This study aimed to better characterize the phenomenon of catamenial pneumothorax; evaluate the risk factors, symptoms, and diagnostic modalities; and recommend...
OBJECTIVES
This study aimed to better characterize the phenomenon of catamenial pneumothorax; evaluate the risk factors, symptoms, and diagnostic modalities; and recommend treatment protocol.
DATA SOURCES
We conducted an electronic-based search using PubMed, EMBASE, Ovid MEDLINE, Google Scholar, and Cochrane Central Register of Controlled Trials.
METHODS OF STUDY SELECTION
The following medical subject heading terms, keywords, and their combinations were used: "catamenial pneumothorax; thoracic endometriosis; pulmonary endometriosis; and pleural endometriosis."
TABULATION, INTEGRATION, AND RESULTS
Individual study results were tabulated in each table by outcome of interest. The search produced an initial 404 results. We excluded studies that did not contain cases with catamenial pneumothorax, case studies, and videos. Eighteen studies met our inclusion criteria and were selected, with a total of 490 patients. The prevalence of catamenial pneumothorax of all cases of pneumothorax in women of reproductive age ranges from 7.3% to 36.7%. The diagnosis was made at an older age than that of pelvic endometriosis. The presence of pelvic endometriosis was reported in only 55% of patients with catamenial pneumothorax. Previous pelvic surgeries were mentioned in only a few of the studies, and 52 of 104 cases (50%) had some kind of previous pelvic intervention. Diagnosis was mostly made clinically, with the patients complaining of the typical symptoms of shortness of breath and recurrent chest pain or shoulder pain a day before to 72 hours after menses. Pneumothorax was found mainly in the right lung (456 of 490 cases, 93%). Diaphragmatic endometriosis and/or nodules were observed in 265 of 297 cases (89%). Recurrence rate varied from 14.3% to 55%.
CONCLUSION
The possibility of endometriosis should be considered in reproductive-aged women with catamenial symptoms of chest pain or shortness of breath. Right pneumothorax and diaphragmatic endometriosis are found in most patients.
Topics: Adult; Endometriosis; Female; Humans; Menstruation; Pneumothorax; Prevalence; Recurrence; Risk Factors; Young Adult
PubMed: 31401265
DOI: 10.1016/j.jmig.2019.08.005 -
The Journal of Surgical Research Apr 2017Numerous thoracoscopic techniques have been used in the management of primary spontaneous pneumothorax (PSP), including wedge resection, pleurectomy, pleural abrasion,... (Meta-Analysis)
Meta-Analysis Review
BACKGROUND
Numerous thoracoscopic techniques have been used in the management of primary spontaneous pneumothorax (PSP), including wedge resection, pleurectomy, pleural abrasion, chemical pleurodesis, and staple line covering. The purpose of this systematic review was to compare outcomes for the most commonly reported techniques.
MATERIALS AND METHODS
A systematic literature search looking at pneumothorax recurrence rate, length of stay, and chest tube duration after surgery was conducted in accordance with Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines using the PubMed database.
RESULTS
Fifty-one unique studies comprised of 6907 patients published between January 1988 and June 2015 were identified. Heterogeneity among effect sizes was significant for all outcomes. The lowest recurrence rates were observed in the wedge resection + chemical pleurodesis (1.7%; 95% confidence interval [CI], 1.0%-2.7%) and the wedge resection + pleural abrasion + chemical pleurodesis (2.8%; 95% CI, 1.7%-4.7%) groups. The shortest chest tube duration and length of stay were observed in the wedge resection + staple line covering ± other group (2.1 d; 95% CI, 1.4-2.9 and 3.3 d; 95% CI, 2.6-4.0, respectively).
CONCLUSIONS
The variability in reported outcomes and the lack of published multicenter randomized controlled trials highlights a need for more robust investigations into the optimal surgical technique in the management of PSP. Based on the limited quality studies available, this systematic review favors wedge resection + chemical pleurodesis and wedge resection + pleural abrasion + chemical pleurodesis in terms of recurrence rate after surgery for PSP.
Topics: Humans; Pleurodesis; Pneumonectomy; Pneumothorax; Recurrence; Surgical Stapling; Thoracoscopy; Treatment Outcome
PubMed: 28457339
DOI: 10.1016/j.jss.2016.10.024 -
Journal of Thoracic Disease May 2021With the adoption of high-tech thoracoscopic surgical instruments, video-assisted thoracoscopic surgery (VATS) has gradually replaced traditional thoracotomy and is used...
BACKGROUND
With the adoption of high-tech thoracoscopic surgical instruments, video-assisted thoracoscopic surgery (VATS) has gradually replaced traditional thoracotomy and is used in the clinical treatment of spontaneous pneumothorax.
METHODS
The composite logic retrieval and Boolean logic retrieval methods were adopted for this meta-analysis. Databases such as PubMed, Medline, Cochrane Library, CNKI, Wanfang, VIP, and Google Scholar were searched using the combination of search terms "Video-assisted thoracoscopic surgery", "spontaneous pneumothorax", and "thoracotomy". Literatures which used video-assisted thoracoscopic surgery for spontaneous pneumothorax as the experimental group were screened. The software RevMan 5.3 provided by the Cochrane system was employed for meta-analysis.
RESULTS
A total of 12 studies were included. After the meta-analysis, heterogeneity testing of the operation time in 8 studies showed that Tau =29.99, Chi =16.99, degrees of freedom (df) =7, I=59%>50%, and the operation time of participants in the experimental group was considerably inferior to that of control group. The mean difference (MD) was -31.02, 95% confidence interval (95% CI: -36.07 to -25.97), Z=12.03, P<0.0001. The heterogeneity test of the length of hospital stay in 9 studies showed that Tau =4.41, Chi =122.58, df =8, I=59%>50%, P<0.01, and the length of hospital stay of participants in the experimental group was remarkably shorter than that of the control group. The MD was -7.29, 95% CI: (-8.76 to -5.82), Z=9.74, and P<0.01. The heterogeneity test of the bleeding volume in 6 studies showed that Tau =191.74, Chi =27.65, df =5, I=82%>50%, P<0.01, and the bleeding volume of participants in the experimental group was remarkably lower in contrast to that of the control group. The MD was -65.48, 95% CI: (-77.84 to -53.13), Z=10.39, and P<0.01. The heterogeneity test of the chest tube removal time in 7 studies showed that Tau =0.29, Chi =28.27, df =6, I=79%>50%, P<0.05, and the chest tube removal time of participants in the experimental group was substantially lower in contrast to that of the control group. The MD was -3.10, 95% CI: (-3.56 to -2.64), Z=13.30, P<0.01.
DISCUSSION
This meta-analysis confirmed that VATS for spontaneous pneumothorax is better than other surgical methods.
PubMed: 34164200
DOI: 10.21037/jtd-21-652 -
PloS One 2021Primary spontaneous pneumothorax (PSP) prevalence is typically higher in juvenile patients than in adults. We aimed to evaluate the optimal treatment for primary... (Comparative Study)
Comparative Study Meta-Analysis
BACKGROUND
Primary spontaneous pneumothorax (PSP) prevalence is typically higher in juvenile patients than in adults. We aimed to evaluate the optimal treatment for primary spontaneous pneumothorax and its efficacy and safety in juveniles.
MATERIALS AND METHODS
We searched PubMed, Embase, and Cochrane databases for eligible studies published from database inception to October 10, 2020, and conducted a systematic review and meta-analysis according to Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. The primary and secondary outcomes were recurrence rate and hospital stay length, respectively. Odds ratios (OR) and mean differences were used for quantitatively analyzing binary and continuous outcomes, respectively. In total, nine retrospective studies with 1,452 juvenile patients (aged <21) were included for the quantitative analysis. The surgical approach led to a lower recurrence rate than did conservative approaches (OR: 1.95, 95% confidence interval: 1.15-3.32). Moreover, the recurrence rate was low in patients who underwent conservative treatment first and received surgery later.
CONCLUSIONS
Surgical approach for first-line management might have a greater effect on recurrence prevention than do conservative approaches. An upfront surgery might be an optimal choice for juvenile primary spontaneous pneumothorax.
Topics: Conservative Treatment; Drainage; Humans; Length of Stay; Pleurodesis; Pneumothorax; Recurrence; Thoracoscopy; Treatment Outcome
PubMed: 33930078
DOI: 10.1371/journal.pone.0250929 -
The Cochrane Database of Systematic... Oct 2020Respiratory distress, particularly respiratory distress syndrome (RDS), is the single most important cause of morbidity and mortality in preterm infants. In infants with... (Meta-Analysis)
Meta-Analysis
BACKGROUND
Respiratory distress, particularly respiratory distress syndrome (RDS), is the single most important cause of morbidity and mortality in preterm infants. In infants with progressive respiratory insufficiency, intermittent positive pressure ventilation (IPPV) with surfactant has been the usual treatment, but it is invasive, potentially resulting in airway and lung injury. Continuous positive airway pressure (CPAP) has been used for the prevention and treatment of respiratory distress, as well as for the prevention of apnoea, and in weaning from IPPV. Its use in the treatment of RDS might reduce the need for IPPV and its sequelae.
OBJECTIVES
To determine the effect of continuous distending pressure in the form of CPAP on the need for IPPV and associated morbidity in spontaneously breathing preterm infants with respiratory distress.
SEARCH METHODS
We used the standard strategy of Cochrane Neonatal to search CENTRAL (2020, Issue 6); Ovid MEDLINE and Epub Ahead of Print, In-Process & Other Non-Indexed Citations, Daily and Versions; and CINAHL on 30 June 2020. We also searched clinical trials databases and the reference lists of retrieved articles for randomised controlled trials and quasi-randomised trials.
SELECTION CRITERIA
All randomised or quasi-randomised trials of preterm infants with respiratory distress were eligible. Interventions were CPAP by mask, nasal prong, nasopharyngeal tube or endotracheal tube, compared with spontaneous breathing with supplemental oxygen as necessary.
DATA COLLECTION AND ANALYSIS
We used standard methods of Cochrane and its Neonatal Review Group, including independent assessment of risk of bias and extraction of data by two review authors. We used the GRADE approach to assess the certainty of evidence. Subgroup analyses were planned on the basis of birth weight (greater than or less than 1000 g or 1500 g), gestational age (groups divided at about 28 weeks and 32 weeks), timing of application (early versus late in the course of respiratory distress), pressure applied (high versus low) and trial setting (tertiary compared with non-tertiary hospitals; high income compared with low income) MAIN RESULTS: We included five studies involving 322 infants; two studies used face mask CPAP, two studies used nasal CPAP and one study used endotracheal CPAP and continuing negative pressure for a small number of less ill babies. For this update, we included one new trial. CPAP was associated with lower risk of treatment failure (death or use of assisted ventilation) (typical risk ratio (RR) 0.64, 95% confidence interval (CI) 0.50 to 0.82; typical risk difference (RD) -0.19, 95% CI -0.28 to -0.09; number needed to treat for an additional beneficial outcome (NNTB) 6, 95% CI 4 to 11; I = 50%; 5 studies, 322 infants; very low-certainty evidence), lower use of ventilatory assistance (typical RR 0.72, 95% CI 0.54 to 0.96; typical RD -0.13, 95% CI -0.25 to -0.02; NNTB 8, 95% CI 4 to 50; I = 55%; very low-certainty evidence) and lower overall mortality (typical RR 0.53, 95% CI 0.34 to 0.83; typical RD -0.11, 95% CI -0.18 to -0.04; NNTB 9, 95% CI 2 to 13; I = 0%; 5 studies, 322 infants; moderate-certainty evidence). CPAP was associated with increased risk of pneumothorax (typical RR 2.48, 95% CI 1.16 to 5.30; typical RD 0.09, 95% CI 0.02 to 0.16; number needed to treat for an additional harmful outcome (NNTH) 11, 95% CI 7 to 50; I = 0%; 4 studies, 274 infants; low-certainty evidence). There was no evidence of a difference in bronchopulmonary dysplasia, defined as oxygen dependency at 28 days (RR 1.04, 95% CI 0.35 to 3.13; I = 0%; 2 studies, 209 infants; very low-certainty evidence). The trials did not report use of surfactant, intraventricular haemorrhage, retinopathy of prematurity, necrotising enterocolitis and neurodevelopment outcomes in childhood.
AUTHORS' CONCLUSIONS
In preterm infants with respiratory distress, the application of CPAP is associated with reduced respiratory failure, use of mechanical ventilation and mortality and an increased rate of pneumothorax compared to spontaneous breathing with supplemental oxygen as necessary. Three out of five of these trials were conducted in the 1970s. Therefore, the applicability of these results to current practice is unclear. Further studies in resource-poor settings should be considered and research to determine the most appropriate pressure level needs to be considered.
Topics: Bronchopulmonary Dysplasia; Continuous Positive Airway Pressure; Humans; Infant, Low Birth Weight; Infant, Newborn; Infant, Premature; Intermittent Positive-Pressure Ventilation; Outcome Assessment, Health Care; Pneumothorax; Pulmonary Surfactants; Randomized Controlled Trials as Topic; Respiratory Distress Syndrome, Newborn; Respiratory Insufficiency; Selection Bias; Treatment Failure
PubMed: 33058208
DOI: 10.1002/14651858.CD002271.pub3 -
Archives of Internal Medicine Feb 2010Little is known about the factors related to the development of pneumothorax following thoracentesis. We aimed to determine the mean pneumothorax rate following... (Meta-Analysis)
Meta-Analysis Review
BACKGROUND
Little is known about the factors related to the development of pneumothorax following thoracentesis. We aimed to determine the mean pneumothorax rate following thoracentesis and to identify risk factors for pneumothorax through a systematic review and meta-analysis.
METHODS
We reviewed MEDLINE-indexed studies from January 1, 1966, through April 1, 2009, and included studies of any design with at least 10 patients that reported the pneumothorax rate following thoracentesis. Two investigators independently extracted data on the pneumothorax rate, risk factors for pneumothorax, and study methodological quality.
RESULTS
Twenty-four studies reported pneumothorax rates following 6605 thoracenteses. The overall pneumothorax rate was 6.0% (95% confidence interval [CI], 4.6%-7.8%), and 34.1% of pneumothoraces required chest tube insertion. Ultrasonography use was associated with significantly lower risk of pneumothorax (odds ratio [OR], 0.3; 95% CI, 0.2-0.7). Lower pneumothorax rates were observed with experienced operators (3.9% vs 8.5%, P = .04), but this was nonsignificant within studies directly comparing this factor (OR, 0.7; 95% CI, 0.2-2.3). Pneumothorax was more likely following therapeutic thoracentesis (OR, 2.6; 95% CI, 1.8-3.8), in conjunction with periprocedural symptoms (OR, 26.6; 95% CI, 2.7-262.5), and in association with, although nonsignificantly, mechanical ventilation (OR, 4.0; 95% CI, 0.95-16.8). Two or more needle passes conferred a nonsignificant increased risk of pneumothorax (OR, 2.5; 95% CI, 0.3-20.1).
CONCLUSIONS
Iatrogenic pneumothorax is a common complication of thoracentesis and frequently requires chest tube insertion. Real-time ultrasonography use is a modifiable factor that reduces the pneumothorax rate. Performance of thoracentesis for therapeutic purposes and in patients undergoing mechanical ventilation confers a higher likelihood of pneumothorax. Experienced operators may have lower pneumothorax rates. Patient safety may be improved by changes in clinical practice in accord with these findings.
Topics: Age Factors; Clinical Competence; Drainage; Female; Humans; Male; Paracentesis; Pleural Cavity; Pneumothorax; Risk Factors; Sex Factors
PubMed: 20177035
DOI: 10.1001/archinternmed.2009.548 -
European Clinical Respiratory Journal 2016To identify bronchoscopy-related complications and discomfort, meaningful complication rates, and predictors. (Review)
Review
OBJECTIVE
To identify bronchoscopy-related complications and discomfort, meaningful complication rates, and predictors.
METHOD
We conducted a systematic literature search in PubMed on 8 February 2016, using a search strategy including the PICO model, on complications and discomfort related to bronchoscopy and related sampling techniques.
RESULTS
The search yielded 1,707 hits, of which 45 publications were eligible for full review. Rates of mortality and severe complications were low. Other complications, for instance, hypoxaemia, bleeding, pneumothorax, and fever, were usually not related to patient characteristics or aspects of the procedure, and complication rates showed considerable ranges. Measures of patient discomfort differed considerably, and results were difficult to compare between different study populations.
CONCLUSION
More research on safety aspects of bronchoscopy is needed to conclude on complication rates and patient- and procedure-related predictors of complications and discomfort.
PubMed: 27839531
DOI: 10.3402/ecrj.v3.33324