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Pojpanichphong P, Yuangtrakul N. Feasibility of the modified mini-bronchoalveolar lavage techniques using a nasogastric suction catheter and polytetrafluoroethylene bronchoscopic suction catheter in diagnosing bilateral pneumonia: a pilot study. J Thorac Dis 2024; 16:2927-2935. [PMID: 38883667 PMCID: PMC11170416 DOI: 10.21037/jtd-23-1573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Accepted: 03/29/2024] [Indexed: 06/18/2024]
Abstract
Background The adequacy of actual lower respiratory tract samples collected using the current collection technique is debated. Endotracheal aspiration is commonly insufficient and can be contaminated with colonization from the proximal airway. Diagnostic bronchoscopy is the standard method for collecting specimens from the lower respiratory tract. However, it is usually unavailable in resource-limited settings. At present, noninvasive methods with the mini-bronchoalveolar lavage (BAL) catheter are used to collect specimens from the lower respiratory tract. Compared with the nasogastric (NG) tube, the polytetrafluoroethylene (PTFE) catheter, a modified mini-BAL catheter that suctions the more distal part of the tracheobronchial tree, can collect actual lower respiratory tract specimens. Methods This prospective open-label pilot study included patients aged >18 years who were diagnosed with bilateral pneumonia and who required mechanical ventilation. Lower respiratory tract samples were collected via endotracheal aspiration, mini-BAL using an NG tube, and mini-BAL using a PTFE bronchoscopic catheter. Data on return fluid volume, white blood cell (WBC) count, microbiologic information obtained via quantitative culture, and each procedure-related complication were recorded. Results The return fluid volumes of the NG tube and PTFE groups were 50 and 40 mL, respectively. The median WBC counts were 245 cells/cumm3 in the NG tube group and 305 cells/cumm3 in the PTFE group. Culture from endotracheal aspiration detected polymicrobial organisms in 8 (20.0%) patients. Further, 19 (47.5%) patients in the NG tube group and 18 (45.0%) in the PTFE group presented with polymicrobial organisms. Approximately 10% of patients developed mini-BAL-related complications, including arrhythmia (2.5%), mild hypoxemia (2.5%), and mild bleeding (5.0%). Conclusions The two modified mini-BAL techniques are feasible in diagnosing patients with pneumonia requiring mechanical ventilation. The mini-BAL technique is more likely to detect polymicrobial organisms compared with endotracheal aspiration, which can then identify the causative polymicrobial organism of ventilator associated pneumonia (VAP) and lead to antibiotic adjustment. Moreover, it is easy to perform, can yield adequate specimens, and has few complications.
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Affiliation(s)
- Phongsaphat Pojpanichphong
- Division of Pulmonology and Respiratory Critical Care, Department of Medicine, Vajira Hospital, Navamindradhiraj University, Bangkok, Thailand
| | - Nadwipa Yuangtrakul
- Division of Pulmonology and Respiratory Critical Care, Department of Medicine, Vajira Hospital, Navamindradhiraj University, Bangkok, Thailand
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Tepper J, Johnson S, Parker C, Collins J, Menard L, Hinkle L. Comparing the Accuracy of Mini-BAL to Bronchoscopic BAL in the Diagnosis of Pneumonia Among Ventilated Patients: A Systematic Literature Review. J Intensive Care Med 2023; 38:1099-1107. [PMID: 37545322 DOI: 10.1177/08850666231193379] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/08/2023]
Abstract
Background: Despite its widespread use, there are no direct studies comparing mini-bronchoalveolar lavage (mini-BAL) to bronchoscopic bronchoalveolar lavage (BAL) for diagnosing pneumonia in ventilated patients. The aim of this study was to perform a systematic review of studies comparing ventilated patients undergoing both bronchoscopic BAL and mini-BAL, to determine the mini-BAL's diagnostic accuracy. Methods: We conducted a systematic review searching the databases PubMed (MEDLINE), EMBASE, Cochrane Library, Scopus, and clinicaltrials.gov from inception until January 2022, in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. Search terms included variations on "pneumonia," "critical illness," and "mini-bronchoalveolar lavage." Article screening and data extraction were performed independently by 2 reviewers. Results: Our search yielded 4296 abstracts. This was narrowed to 6 studies in which each patient underwent both mini-BAL and bronchoscopic BAL in succession. Included patients had a mean APACHE II score of 20.02 ± 3.81 and 15.95 ± 11.46 ventilator days. The sensitivity of the mini-BAL for diagnosis of pneumonia was 0.90 (95% confidence interval [CI]: 0.778-1.000) and the specificity was 0.827 (95% CI: 0.716-0.938). Limitations included inconsistency in volume of saline instilled and heterogeneity in included patients Conclusion: This study is the first to compile data from multiple publications directly comparing the mini-BAL to bronchoscopic BAL for diagnosing pneumonia in ventilated patients. Our data demonstrate a high degree of both sensitivity and specificity of mini-BAL for the diagnosis of pneumonia in ventilated patients and indicate that mini-BAL could be considered as an acceptable alternative diagnostic study.
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Affiliation(s)
- John Tepper
- Department of Internal Medicine, Indiana University School of Medicine, Indianapolis, IN, USA
- Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Sean Johnson
- Department of Internal Medicine, Indiana University School of Medicine, Indianapolis, IN, USA
- Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Connor Parker
- Department of Internal Medicine, Indiana University School of Medicine, Indianapolis, IN, USA
- Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN, USA
| | - James Collins
- Department of Internal Medicine, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Laura Menard
- Libary and Information Science, Northern Kentucky University, Highland Heights, KY, USA
| | - Laura Hinkle
- Division of Pulmonary, Critical Care, Sleep & Occupational Medicine, Indiana University School of Medicine, Indianapolis, IN, USA
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Jeng M, Orsini EM, Yerke J, Mehkri O, Mireles-Cabodevila E, Khouli H, Mujanovic S, Wang X, Duggal A, Vachharajani V, Scheraga RG. Nonbronchoscopic Bronchoalveolar Lavage Improves Respiratory Culture Accuracy in Critically Ill Patients. Crit Care Explor 2023; 5:e1008. [PMID: 38020848 PMCID: PMC10656098 DOI: 10.1097/cce.0000000000001008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2023] Open
Abstract
OBJECTIVES Diagnosis of pneumonia is challenging in critically ill, intubated patients due to limited diagnostic modalities. Endotracheal aspirate (EA) cultures are standard of care in many ICUs; however, frequent EA contamination leads to unnecessary antibiotic use. Nonbronchoscopic bronchoalveolar lavage (NBBL) obtains sterile, alveolar cultures, avoiding contamination. However, paired NBBL and EA sampling in the setting of a lack of gold standard for airway culture is a novel approach to improve culture accuracy and limit antibiotic use in the critically ill patients. DESIGN We designed a pilot study to test respiratory culture accuracy between EA and NBBL. Adult, intubated patients with suspected pneumonia received concurrent EA and NBBL cultures by registered respiratory therapists. Respiratory culture microbiology, cell counts, and antibiotic prescribing practices were examined. SETTING We performed a prospective pilot study at the Cleveland Clinic Main Campus Medical ICU in Cleveland, Ohio for 22 months from May 2021 through March 2023. PATIENTS OR SUBJECTS Three hundred forty mechanically ventilated patients with suspected pneumonia were screened. Two hundred fifty-seven patients were excluded for severe hypoxia (Fio2 ≥ 80% or positive end-expiratory pressure ≥ 12 cm H2O), coagulopathy, platelets less than 50,000, hemodynamic instability as determined by the treating team, and COVID-19 infection to prevent aerosolization of the virus. INTERVENTIONS All 83 eligible patients were enrolled and underwent concurrent EA and NBBL. MEASUREMENTS AND MAIN RESULTS More EA cultures (42.17%) were positive than concurrent NBBL cultures (26.51%, p = 0.049), indicating EA contamination. The odds of EA contamination increased by eight-fold 24 hours after intubation. EA was also more likely to be contaminated with oral flora when compared with NBBL cultures. There was a trend toward decreased antibiotic use in patients with positive EA cultures if paired with a negative NBBL culture. Alveolar immune cell populations were recovered from NBBL samples, indicating successful alveolar sampling. There were no major complications from NBBL. CONCLUSIONS NBBL is more accurate than EA for respiratory cultures in critically ill, intubated patients. NBBL provides a safe and effective technique to sample the alveolar space for both clinical and research purposes.
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Affiliation(s)
- Margaret Jeng
- Department of Pulmonary and Critical Care, Respiratory Institute, Cleveland Clinic, Cleveland, OH
| | - Erica M Orsini
- Department of Pulmonary and Critical Care, Respiratory Institute, Cleveland Clinic, Cleveland, OH
| | - Jason Yerke
- Department of Pharmacy, Cleveland Clinic, Cleveland, OH
| | - Omar Mehkri
- Department of Pulmonary and Critical Care, Respiratory Institute, Cleveland Clinic, Cleveland, OH
| | | | - Hassan Khouli
- Department of Pulmonary and Critical Care, Respiratory Institute, Cleveland Clinic, Cleveland, OH
| | - Samin Mujanovic
- Department of Pulmonary and Critical Care, Respiratory Institute, Cleveland Clinic, Cleveland, OH
| | - Xiaofeng Wang
- Quantitative Health Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH
| | - Abhijit Duggal
- Department of Pulmonary and Critical Care, Respiratory Institute, Cleveland Clinic, Cleveland, OH
| | - Vidula Vachharajani
- Department of Pulmonary and Critical Care, Respiratory Institute, Cleveland Clinic, Cleveland, OH
- Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, OH
| | - Rachel G Scheraga
- Department of Pulmonary and Critical Care, Respiratory Institute, Cleveland Clinic, Cleveland, OH
- Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, OH
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Lower Respiratory Tract Coinfection in the ICU: Prevalence and Clinical Significance of Coinfection Detected via Microbiological Analysis of Bronchoalveolar Lavage Fluid With a Comparison of Invasive Methodologies. Crit Care Explor 2022; 4:e0708. [PMID: 35765376 PMCID: PMC9225485 DOI: 10.1097/cce.0000000000000708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Pneumonia remains a significant cause of morbidity and mortality, with increasing interest in the detection and clinical significance of coinfection. Further investigation into the impact of bronchoalveolar lavage (BAL) sampling methodology and efficient clinical utilization of microbiological analyses is needed to guide the management of lower respiratory tract infection in the ICU.
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Clark J, White D, Daubney E, Curran M, Bousfield R, Gouliouris T, Powell E, Palmer A, Agrawal S, Inwald D, Kean I, Török ME, Baker S, Pathan N. Low diagnostic yield and time to diagnostic confirmation results in prolonged use of antimicrobials in critically ill children. Wellcome Open Res 2022; 6:119. [PMID: 35299710 PMCID: PMC8902261.2 DOI: 10.12688/wellcomeopenres.16848.2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/01/2022] [Indexed: 11/20/2022] Open
Abstract
Background: Broad-spectrum antimicrobial therapy is a key driver of antimicrobial resistance. Here, we aimed to review indications for antimicrobial therapy, determine the proportion of suspected bacterial infections that are confirmed by culture, and assess the time taken for microbiology test results to become available in the paediatric intensive care unit (PICU). Methods: A single-centre prospective observational cohort study of 100 consecutive general PICU admissions from 30 October 2019 to 19 February 2020. Data were collected from the hospital medical record and entered into a study database prior to statistical analysis using standard methods. Results: Of all episodes of suspected infection, 22% of lower respiratory tract infection, 43% of bloodstream and 0% of central nervous system infection were associated with growth on microbiology culture. 90% of children received antimicrobial therapy. Hospital-acquired infection occurred less commonly than primary infection, but an organism was grown in a greater proportion (64%) of cultures. Final laboratory reports for negative cultures were issued at a median of 120.3 hours for blood cultures and 55.5 hours for endotracheal tube aspirate cultures. Conclusions: Despite most critically children receiving antimicrobial therapy, infection was often not microbiologically confirmed. Novel molecular diagnostics may improve rationalisation of treatment in this population.
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Affiliation(s)
- John Clark
- Department of Paediatrics, University of Cambridge, Cambridge, Cambridgeshire, CB2 0QQ, UK
- Cambridge University Hospitals NHS Foundation Trust, Cambridge, Cambridgeshire, CB2 0QQ, UK
| | - Deborah White
- Cambridge University Hospitals NHS Foundation Trust, Cambridge, Cambridgeshire, CB2 0QQ, UK
| | - Esther Daubney
- Cambridge University Hospitals NHS Foundation Trust, Cambridge, Cambridgeshire, CB2 0QQ, UK
| | - Martin Curran
- Clinical Microbiology and Public Health Laboratory, Public Health England, Cambridge, Cambridgeshire, CB2 0QQ, UK
| | - Rachel Bousfield
- Cambridge University Hospitals NHS Foundation Trust, Cambridge, Cambridgeshire, CB2 0QQ, UK
| | - Theodore Gouliouris
- Cambridge University Hospitals NHS Foundation Trust, Cambridge, Cambridgeshire, CB2 0QQ, UK
| | - Elizabeth Powell
- Cambridge University Hospitals NHS Foundation Trust, Cambridge, Cambridgeshire, CB2 0QQ, UK
| | - Adam Palmer
- Cambridge University Hospitals NHS Foundation Trust, Cambridge, Cambridgeshire, CB2 0QQ, UK
| | - Shruti Agrawal
- Cambridge University Hospitals NHS Foundation Trust, Cambridge, Cambridgeshire, CB2 0QQ, UK
| | - David Inwald
- Cambridge University Hospitals NHS Foundation Trust, Cambridge, Cambridgeshire, CB2 0QQ, UK
| | - Iain Kean
- Department of Paediatrics, University of Cambridge, Cambridge, Cambridgeshire, CB2 0QQ, UK
| | - M Estée Török
- Cambridge University Hospitals NHS Foundation Trust, Cambridge, Cambridgeshire, CB2 0QQ, UK
- Department of Medicine, University of Cambridge, Cambridge, Cambridgeshire, CB2 0QQ, UK
- Cambridge Institute of Therapeutic Immunology and Infectious Disease, University of Cambridge, Cambridge, Cambridgeshire, CB2 0QQ, UK
| | - Stephen Baker
- Cambridge Institute of Therapeutic Immunology and Infectious Disease, University of Cambridge, Cambridge, Cambridgeshire, CB2 0QQ, UK
| | - Nazima Pathan
- Department of Paediatrics, University of Cambridge, Cambridge, Cambridgeshire, CB2 0QQ, UK
- Cambridge University Hospitals NHS Foundation Trust, Cambridge, Cambridgeshire, CB2 0QQ, UK
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6
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Clark J, White D, Daubney E, Curran M, Bousfield R, Gouliouris T, Powell E, Palmer A, Agrawal S, Inwald D, Kean I, Török ME, Baker S, Pathan N. Low diagnostic yield and time to diagnostic confirmation results in prolonged use of antimicrobials in critically ill children. Wellcome Open Res 2021; 6:119. [PMID: 35299710 PMCID: PMC8902261 DOI: 10.12688/wellcomeopenres.16848.1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/13/2021] [Indexed: 11/20/2022] Open
Abstract
Background: Broad-spectrum antimicrobial therapy is a key driver of antimicrobial resistance. Here, we aimed to review indications for antimicrobial therapy, determine the proportion of suspected bacterial infections that are confirmed by culture, and assess the time taken for microbiology test results to become available in the paediatric intensive care unit (PICU). Methods: A single-centre prospective observational cohort study of 100 consecutive general PICU admissions from 30 October 2019 to 19 February 2020. Data were collected from the hospital medical record and entered into a study database prior to statistical analysis using standard methods. Results: Of all episodes of suspected infection, 22% of lower respiratory tract infection, 43% of bloodstream and 0% of central nervous system infection were associated with growth on microbiology culture. 90% of children received antimicrobial therapy. Hospital-acquired infection occurred less commonly than primary infection, but an organism was grown in a greater proportion (64%) of cultures. Final laboratory reports for negative cultures were issued at a median of 120.3 hours for blood cultures and 55.5 hours for endotracheal tube aspirate cultures. Conclusions: Despite most critically children receiving antimicrobial therapy, infection was often not microbiologically confirmed. Novel molecular diagnostics may improve rationalisation of treatment in this population.
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Affiliation(s)
- John Clark
- Department of Paediatrics, University of Cambridge, Cambridge, Cambridgeshire, CB2 0QQ, UK
- Cambridge University Hospitals NHS Foundation Trust, Cambridge, Cambridgeshire, CB2 0QQ, UK
| | - Deborah White
- Cambridge University Hospitals NHS Foundation Trust, Cambridge, Cambridgeshire, CB2 0QQ, UK
| | - Esther Daubney
- Cambridge University Hospitals NHS Foundation Trust, Cambridge, Cambridgeshire, CB2 0QQ, UK
| | - Martin Curran
- Clinical Microbiology and Public Health Laboratory, Public Health England, Cambridge, Cambridgeshire, CB2 0QQ, UK
| | - Rachel Bousfield
- Cambridge University Hospitals NHS Foundation Trust, Cambridge, Cambridgeshire, CB2 0QQ, UK
| | - Theodore Gouliouris
- Cambridge University Hospitals NHS Foundation Trust, Cambridge, Cambridgeshire, CB2 0QQ, UK
| | - Elizabeth Powell
- Cambridge University Hospitals NHS Foundation Trust, Cambridge, Cambridgeshire, CB2 0QQ, UK
| | - Adam Palmer
- Cambridge University Hospitals NHS Foundation Trust, Cambridge, Cambridgeshire, CB2 0QQ, UK
| | - Shruti Agrawal
- Cambridge University Hospitals NHS Foundation Trust, Cambridge, Cambridgeshire, CB2 0QQ, UK
| | - David Inwald
- Cambridge University Hospitals NHS Foundation Trust, Cambridge, Cambridgeshire, CB2 0QQ, UK
| | - Iain Kean
- Department of Paediatrics, University of Cambridge, Cambridge, Cambridgeshire, CB2 0QQ, UK
| | - M. Estée Török
- Cambridge University Hospitals NHS Foundation Trust, Cambridge, Cambridgeshire, CB2 0QQ, UK
- Department of Medicine, University of Cambridge, Cambridge, Cambridgeshire, CB2 0QQ, UK
- Cambridge Institute of Therapeutic Immunology and Infectious Disease, University of Cambridge, Cambridge, Cambridgeshire, CB2 0QQ, UK
| | - Stephen Baker
- Cambridge Institute of Therapeutic Immunology and Infectious Disease, University of Cambridge, Cambridge, Cambridgeshire, CB2 0QQ, UK
| | - Nazima Pathan
- Department of Paediatrics, University of Cambridge, Cambridge, Cambridgeshire, CB2 0QQ, UK
- Cambridge University Hospitals NHS Foundation Trust, Cambridge, Cambridgeshire, CB2 0QQ, UK
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Agarwal A, Malviya D, Harjai M, Tripathi SS, Das A, Parashar S. Comparative Evaluation of the Role of Nonbronchoscopic and Bronchoscopic Techniques of Distal Airway Sampling for the Diagnosis of Ventilator-Associated Pneumonia. Anesth Essays Res 2021; 14:434-440. [PMID: 34092855 PMCID: PMC8159038 DOI: 10.4103/aer.aer_5_21] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 01/28/2021] [Accepted: 02/01/2021] [Indexed: 11/26/2022] Open
Abstract
Background: The diagnosis of ventilator-associated pneumonia (VAP) remains a challenge, with clinicians mainly relying on clinical, radiological, and bacteriologic strategies to manage patients with VAP. Aims: To compare the results of non-bronchoscopic and bronchoscopic techniques of distal airway sampling for the diagnosis of VAP. Settings and Design: This was a single-center prospective diagnostic accuracy study done in the 14-bedded intensive care unit of a tertiary care referral hospital. Materials and Methods: Patients aged ≥18 years, on mechanical ventilation for ≥48 h, and with clinical suspicion of VAP (fever, leukocytosis, and increased tracheal secretions) either on admission or during their stay were included. Every patient underwent both procedures for sample collection, first non-bronchoscopic protected bronchoalveolar lavage (NP-BAL) and then bronchoscopic BAL (B-BAL). Clinical Pulmonary Infection Score (CPIS) was calculated for each patient and the collected samples were evaluated in laboratory using standard microbiological techniques. Statistical Analysis Used: The sensitivity, specificity, positive predictive value, and negative predictive value of NP-BAL and B-BAL for the diagnosis of VAP were calculated taking CPIS score of >6 as index test for the diagnosis of VAP. Results: Sixty patients were included in the study. Both NP-BAL and B-BAL had concordance with the CPIS at 69.1%. The concordance between NP-BAL and B-BAL was better at 67.6% with a kappa coefficient of 0.064 (P = −0.593). The yield and sensitivity of NP-BAL were comparable to that of B-BAL. Conclusions: The blind NP-BAL is an equally effective method of airway sampling and could be a better alternative to replace more invasive B-BAL for microbiologic diagnosis of VAP.
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Affiliation(s)
- Abhinav Agarwal
- Department of Anaesthesiology, AIIMS, Bhopal, Madhya Pradesh, India
| | - Deepak Malviya
- Department of Anaesthesiology and Critical Care, Dr. Ram Manohar Lohia Institute of Medical Sciences, Lucknow, Uttar Pradesh, India
| | - Mamta Harjai
- Department of Anaesthesiology and Critical Care, Dr. Ram Manohar Lohia Institute of Medical Sciences, Lucknow, Uttar Pradesh, India
| | - S S Tripathi
- Department of Emergency Medicine, Dr. Ram Manohar Lohia Institute of Medical Sciences, Lucknow, Uttar Pradesh, India
| | - Anupam Das
- Department of Microbiology, Dr. Ram Manohar Lohia Institute of Medical Sciences, Lucknow, Uttar Pradesh, India
| | - Samiksha Parashar
- Department of Anaesthesiology and Critical Care, Dr. Ram Manohar Lohia Institute of Medical Sciences, Lucknow, Uttar Pradesh, India
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Liao CC, Tsai MH, Lai SH, Lai MY, Chu SM, Huang HR, Hsu KH, Chiang MC, Fu RH, Hsu JF. Safety and clinical application of nonbronchoscopic bronchoalveolar lavage in preterm neonates with clinical ventilator-associated pneumonia. Pediatr Neonatol 2021; 62:195-201. [PMID: 33413988 DOI: 10.1016/j.pedneo.2020.11.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 08/27/2020] [Accepted: 11/13/2020] [Indexed: 10/22/2022] Open
Abstract
BACKGROUND The safety and clinical application of nonbronchoscopic bronchoalveolar lavage (NB-BAL) in preterm neonates with ventilator-associated pneumonia (VAP) have not been fully investigated, and limited data on the feasibility of this method are available. METHODS Premature infants with clinically suspected VAP between October 2017 and June 2019 were enrolled, and NB-BAL was performed. The tolerance and safety of NB-BAL were prospectively recorded during the procedure, and the clinical applications of NB-BAL were observed. RESULTS A total of 46 NB-BAL procedures were performed in 31 neonates with clinically suspected VAP. The median (interquartile range) gestational age and birth body weight were 28.7 (26.7-31.3) weeks and 1055.0 (817.0-1475.0) grams, respectively. Overall, all episodes of the procedure were well tolerated, with only 9 (19.5%) episodes showing transient desaturation and one patient (2.2%) showing bradycardia during the NB-BAL procedure. There were no impairments in arterial blood gas, cardiopulmonary parameters or respiratory severity scores after NB-BAL. No significant complications occurred in any of the patients who received NB-BAL. No chronic comorbidities affected the safety and clinical application of NB-BAL in these mechanically ventilated preterm neonates. NB-BAL yielded a diagnosis in 32 (69.6%) of these VAP episodes. Staphylococcus aureus was the most common isolated bacterium and accounted for 7 (15.2%) confirmed cases of VAP in our study, followed by polymicrobial microorganisms (n = 6, 13.0%). The appropriate antibiotics were prescribed and modified according to the NB-BAL results in 25 (54.3%) cases of VAP. CONCLUSIONS NB-BAL is a safe and clinically applicable method for determining the etiology and diagnosis of VAP in the NICU, even in extremely preterm neonates with major chronic comorbidities. Further studies to investigate the diagnostic accuracy and impact of NB-BAL on VAP treatment in neonates are warranted in the future.
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Affiliation(s)
- Chen-Chu Liao
- Department of Pediatrics, Chang Gung Memorial Hospital, Chiayi, Taiwan; Division of Neonatology, Department of Pediatrics, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Ming-Horng Tsai
- Division of Neonatology and Pediatric Hematology/Oncology, Department of Pediatrics, Chang Gung Memorial Hospital, Yunlin, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Shen-Hao Lai
- College of Medicine, Chang Gung University, Taoyuan, Taiwan; Division of Pediatric Pulmonology, Department of Pediatrics, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Mei-Yin Lai
- Division of Neonatology, Department of Pediatrics, Chang Gung Memorial Hospital, Taoyuan, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Shih-Ming Chu
- Division of Neonatology, Department of Pediatrics, Chang Gung Memorial Hospital, Taoyuan, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Hsuan-Rong Huang
- Division of Neonatology, Department of Pediatrics, Chang Gung Memorial Hospital, Taoyuan, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Kai-Hsiang Hsu
- Division of Neonatology, Department of Pediatrics, Chang Gung Memorial Hospital, Taoyuan, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Ming-Chou Chiang
- Division of Neonatology, Department of Pediatrics, Chang Gung Memorial Hospital, Taoyuan, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Ren-Huei Fu
- Division of Neonatology, Department of Pediatrics, Chang Gung Memorial Hospital, Taoyuan, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Jen-Fu Hsu
- Division of Neonatology, Department of Pediatrics, Chang Gung Memorial Hospital, Taoyuan, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan.
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Bardet C, Barraud O, Clavel M, Fortin T, Charrier JP, Rodrigue M, François B, Yugueros-Marcos J, Lemoine J, Ploy MC. Early and specific targeted mass spectrometry-based identification of bacteria in endotracheal aspirates of patients suspected with ventilator-associated pneumonia. Eur J Clin Microbiol Infect Dis 2021; 40:1291-1301. [PMID: 33486654 PMCID: PMC7826153 DOI: 10.1007/s10096-020-04132-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Accepted: 12/14/2020] [Indexed: 11/26/2022]
Abstract
Rapid and reliable pathogen identification is compulsory to confirm ventilator-associated pneumonia (VAP) in order to initiate appropriate antibiotic treatment. In the present proof of concept, the effectiveness of rapid microorganism identification with a targeted bottom-up proteomics approach was investigated in endotracheal aspirate (ETA) samples of VAP patients. To do so, a prototype selected-reaction monitoring (SRM)-based assay was developed on a triple quadrupole mass spectrometer tracking proteotypic peptide surrogates of bacterial proteomes. Through the concurrent monitoring of 97 species-specific peptides, this preliminary assay was dimensioned to characterize the occurrence of six most frequent bacterial species responsible for over more than 65% of VAP. Assay performance was subsequently evaluated by analyzing early and regular 37 ETA samples collected from 15 patients. Twenty-five samples were above the significant threshold of 105 CFU/mL and five samples showed mixed infections (both pathogens ≥ 105 CFU/mL). The targeted proteomics assay showed 100% specificity for Acinetobacter baumannii, Escherichia coli, Haemophilus influenzae, Pseudomonas aeruginosa, Staphylococcus aureus, and Streptococcus pneumoniae. No false bacterial identification was reported and no interference was detected arising from the commensal flora. The overall species identification sensitivity was 19/25 (76%) and was higher at the patient level (84.6%). This successful proof of concept provides a rational to broaden the panel of bacteria for further clinical evaluation.
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Affiliation(s)
- Chloé Bardet
- Université Limoges, INSERM, CHU Limoges, RESINFIT, U1092, F-87000, Limoges, France
- bioMerieux, MD3 & Microbiology Research Departments, Marcy l'Etoile, France
- Anaquant, 5 rue de La Doua, Villeurbanne, France
| | - Olivier Barraud
- Université Limoges, INSERM, CHU Limoges, RESINFIT, U1092, F-87000, Limoges, France
| | - Marc Clavel
- CHU Limoges, Service de Réanimation polyvalente, Limoges, France
- CHU Limoges, INSERM, CIC1435, Limoges, France
- Etablissement de médecine et SSR, Sainte-Feyre, France
| | - Tanguy Fortin
- bioMerieux, MD3 & Microbiology Research Departments, Marcy l'Etoile, France
- Anaquant, 5 rue de La Doua, Villeurbanne, France
| | | | - Marc Rodrigue
- bioMerieux, MD3 & Microbiology Research Departments, Marcy l'Etoile, France
- bioMérieux, Global Medical Affairs Department, Marcy l'Etoile, France
| | - Bruno François
- Université Limoges, INSERM, CHU Limoges, RESINFIT, U1092, F-87000, Limoges, France
- CHU Limoges, Service de Réanimation polyvalente, Limoges, France
- CHU Limoges, INSERM, CIC1435, Limoges, France
| | | | - Jerome Lemoine
- Université de Lyon, CNRS, Université Claude Bernard Lyon 1, Institut des Sciences Analytiques, UMR 5280, 5 rue de La Doua, 69100, Villeurbanne, France.
| | - Marie-Cécile Ploy
- Université Limoges, INSERM, CHU Limoges, RESINFIT, U1092, F-87000, Limoges, France.
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Mishra DR, Shah DS, Shah N, Prasad JN, Gupta PP, Agrawaal KK. Study of microbiological and antibiotic sensitivity pattern of ventilator associated pneumonia (VAP) in ICU of a tertiary care hospital in Nepal. J Family Med Prim Care 2020; 9:6171-6176. [PMID: 33681059 PMCID: PMC7928152 DOI: 10.4103/jfmpc.jfmpc_1430_20] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 09/17/2020] [Accepted: 09/25/2020] [Indexed: 02/03/2023] Open
Abstract
INTRODUCTION Ventilator-associated pneumonia (VAP) is the most frequent intensive care unit (ICU) acquired infection among patients receiving mechanical ventilation. Accurate clinical and microbiologic diagnosis of VAP is essential not only for selection of appropriate antimicrobials but also to prevent their misuse. As the organisms and their sensitivity pattern may differ in every ICU, the knowledge of the resident flora and their behaviour should be known for successful treatment. METHODS The study was conducted to evaluate the organisms responsible for VAP and their Antibiotic Sensitivity Pattern for the study setting. A prospective, open, epidemiological clinical study was performed in a tertiary care hospital in Nepal. 100 patients admitted to ICU and Mechanically Ventilated were evaluated about VAP. Clinical Pulmonary Infection Score (CPIS) was used to diagnose VAP. RESULTS Among 60 patients ventilated for more than 48 hours, 25 (41.6%) developed VAP. The VAP was caused predominantly by Klebsiella pneumonia in 34.5% of cases, followed by Acinetobacter calcoaceticus baumanni in 27.6%, Acinetobacter wolffi and Pseudomonas aeruginosa in 13.8% each and Escheresia coli in 10.3%. The most sensitive antibiotics were Colistin, followed by Polymyxin B and Amikacin with sensitivity rates of 67%, 60% and 58%, respectively. CONCLUSION Based on these results, an empiric approach to antibiotic treatment can be made tailored to the specific settings. Given the magnitude of drug resistance and its implicated financial and societal burden, there is an urgent need for broad implementation of Antibiotic Stewardship programs across all health care settings.
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Affiliation(s)
- Deebya R. Mishra
- Department of Pulmonary, Critical Care and Sleep Medicine, B.P. Koirala Institute of Health Sciences, Dharan, Nepal
| | - Divya S. Shah
- Department of Nephrology, Maharajgunj Medical College, Institute of Medicine, Kathmandu, Nepal
| | - Niharika Shah
- Department of Pathology, B.P. Koirala Institute of Health Sciences, Dharan, Nepal
| | - Jagat N. Prasad
- Department of Anesthesia and Critical Care, B.P. Koirala Institute of Health Sciences, Dharan, Nepal
| | - Pramendra P. Gupta
- Department of General Practice and Emergency Medicine, B.P. Koirala Institute of Health Sciences, Dharan, Nepal
| | - Krishna K. Agrawaal
- Department of Internal Medicine, Universal College of Medical Sciences, Bhairahawa, Nepal
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Nusrat T, Akter N, Rahman NAA, Godman B, D Rozario DT, Haque M. Antibiotic resistance and sensitivity pattern of Metallo-β-Lactamase Producing Gram-Negative Bacilli in ventilator-associated pneumonia in the intensive care unit of a public medical school hospital in Bangladesh. Hosp Pract (1995) 2020; 48:128-136. [PMID: 32271642 DOI: 10.1080/21548331.2020.1754687] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Accepted: 04/08/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Ventilator-associated pneumonia (VAP) is the most common nosocomial infection in intensive care units (ICU), accounting for 25% of all ICU infections. Antimicrobial resistance is increasing and becoming a significant health problem worldwide, increasing hospital length of stay, mortality and costs. Identifying antibiotic resistance patterns in VAP is important as this can cause outbreaks in ICUs. To date, there have been limited studies assessing this in Bangladesh. Consequently, the primary objective of this research was to study the species of bacterial growth and to determine the antibiotic resistance patterns of Metallo-β-Lactamase (MBL) producing gram-negative bacilli among ICU patients with VAP in a public medical school hospital, Bangladesh. In addition, identify the factors associated with a positive culture to provide future guidance. METHOD Cross-sectional study performed in the Chattogram Medical College Hospital, Bangladesh. Mueller Hinton agar plates were used for antibiotic sensitivity testing by the Kirby-Buer disc diffusion test. RESULTS Among 105 clinically suspected VAP cases, qualitative cultures were positive in 95 (90%) of them. The most common bacteria identified were Acinetobacter spp. (43.2%), Klebsiella spp. (20%) and Pseudomonas spp. (18.9%). A positive culture was not associated with patients' age or gender. Among 41 isolated Acinetobacter spp., 38 (92.7%) were resistant to gentamicin followed by 36 (87.8%) to ceftriaxone. Among 24 isolated Klebsiella spp., 22 (83.3%) were resistant to ceftriaxone. Among 18 isolated Pseudomonas spp., 16 (88.8%) were resistant to ciprofloxacin, and 13 (72.2%) were resistant to ceftriaxone. Among nine isolated E. coli, all were resistant to ceftriaxone and ciprofloxacin. All four Proteus spp. (100%) isolated were resistant to ciprofloxacin. Additionally, phenotype MBL producing was 65.22% and genotype was 45.65% among imipenem resistant pathogens. Imipenem resistant pathogens were sensitive to amoxyclav, amikacin¸ azithromycin, ceftazidime, ceftriaxone, colistin and gentamycin. CONCLUSION A positive culture was detected in 90% of VAP patients, but it was not associated with the patients' age and gender. The most common bacteria identified were Acinetobacter spp., Klebsiella spp. and Pseudomonas spp., where the majority of these were resistant to ceftriaxone. The results are being used to provide future guidance on the empiric management of VAP in this hospital.
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Affiliation(s)
- Tanzina Nusrat
- Department of Microbiology, Chittagong Medical College , Panchlaish, Chattogram, Bangladesh
| | - Nasima Akter
- Department of Microbiology, Chittagong Medical College , Panchlaish, Chattogram, Bangladesh
| | - Nor Azlina A Rahman
- Department of Physical Rehabilitation Sciences, Kulliyyah of Allied Health Sciences, International Islamic University Malaysia , Bandar Indera Mahkota, Kuantan, Malaysia
| | - Brian Godman
- Department of Pharmacoepidemiology, Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde , Glasgow, UK
- Department of Pharmacy, Faculty of Health Sciences, Sefako Makgatho Health Sciences University , Pretoria, South Africa
- Health Economics Centre, University of Liverpool , Liverpool, UK
- Division of Clinical Pharmacology, Karolinska Institute, Karolinska University Hospital Huddinge , Stockholm, Sweden
| | | | - Mainul Haque
- Faculty of Medicine and Defense Health, Universiti Pertahanan Nasional Malaysia (National Defense University of Malaysia) , Kem Sungai Besi, Kuala Lumpur, Malaysia
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Comparative Study of CDST & Multiplex PCR to Detect MBL Producing Gram-Negative Bacilli among VAP Patients Admitted in a Public Medical College Hospital of Bangladesh. Pathogens 2019; 8:pathogens8030151. [PMID: 31547453 PMCID: PMC6789483 DOI: 10.3390/pathogens8030151] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 09/04/2019] [Accepted: 09/09/2019] [Indexed: 11/30/2022] Open
Abstract
Background: Ventilator-associated pneumonia (VAP) is the most common nosocomial infection in intensive care units (ICU), which accounts for 25% of all ICU infection. Documenting carbapenem-resistant gram-negative bacilli is very important as these strains may often cause outbreaks in the ICU setting and are responsible for the increased mortality and morbidity or limiting therapeutic options. The classical phenotypic method cannot provide an efficient means of diagnosis of the metallo-β-lactamases (MBLs) producer. Polymerase chain reaction (PCR) assays have lessened the importance of the phenotypic approach by detecting metallo-β-lactamase resistance genes such as New Delhi metallo-β-lactamase (NDM), Imipenemase (IMP), Verona integron-encoded metallo-β-lactamase (VIM), Sao Paulo metallo-β-lactamase (SPM), Germany Imipenemase (GIM). Objective: To compare the results of the Combined Disc Synergy Test (CDST) with that of the multiplex PCR to detect MBL-producing gram-negative bacilli. Materials and Method: A total of 105 endotracheal aspirates (ETA) samples were collected from the ICU of a public school in Bangladesh. This cross-sectional study was carried out in the Department of Microbiology, Chittagong for quantitative culture, CDST test, and multiplex PCR for blaIMP, blaVIM, blaNDM genes of MBL producers. Results: Among the 105 clinically suspected VAP cases, the quantitative culture was positive in 95 (90%) and among 95 g-negative bacilli isolated from VAP patients, 46 (48.42%) were imipenem resistant, 30 (65.22%) were MBL producers by CDST, 21 (45.65%) were identified as MBL producers by multiplex PCR. Conclusion: PCR was highly sensitive and specific for the detection of MBL producers.
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Viswan A, Ghosh P, Gupta D, Azim A, Sinha N. Distinct Metabolic Endotype Mirroring Acute Respiratory Distress Syndrome (ARDS) Subphenotype and its Heterogeneous Biology. Sci Rep 2019; 9:2108. [PMID: 30765824 PMCID: PMC6375936 DOI: 10.1038/s41598-019-39017-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Accepted: 01/11/2019] [Indexed: 01/31/2023] Open
Abstract
Predisposing aetiologies in Acute Respiratory Distress Syndrome (ARDS), perpetuates to heterogeneous clinical course hampering therapeutic response. Therefore, physiological variables need to be identified by stratifying ARDS subphenotypes and endotype, to target ARDS heterogeneity. The present study is stimulated by the fact that the ARDS heterogeneity arises from diverse pathophysiological changes leading to distinct ARDS endotypes characterized by perturbed biological mechanism which can be exploited in terms of metabolic profile by metabolomics. Biological endotypes using (n = 464 patients and controls), mBALF and serum samples were identified by high - resolution NMR spectroscopy from two clinically diagnosed ARDS subtypes grouped under mild, moderate and severe ARDS as subphenotype1and pulmonary and extra - pulmonary ARDS as subphenotype2. The identified mBALF endotypes (isoleucine, leucine, valine, lysine/arginine, tyrosine, threonine) and serum endotypes (proline, glutamate, phenylalanine, valine) in both subphenotypes by statistical analysis were tested for their reproducibility and robustness. By combining metabolic endotypes with clinical based mortality score (APACHE and SOFA) added to their predictive performance as ARDS mortality predictors. Thus, a comprehensive set of mBALF endotypes representing compartmentalized lung milieu and serological endotypes representing systemic markers of ARDS subtypes were validated. The interlinked biological pathway of these disease specific endotype further elucidated their role as candidate biomarker in governing ARDS heterogeneous biology.
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Affiliation(s)
- Akhila Viswan
- Centre of Biomedical Research, SGPGIMS Campus, Raebarelly Road, Lucknow, 226014, India
- Faculty of Engineering and Technology, Dr. A. P. J. Abdul Kalam Technical University, Lucknow, 226021, India
| | - Pralay Ghosh
- Department of Critical Care Medicine, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, 226014, India
| | - Devendra Gupta
- Department of Anaesthesia, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, 226014, India.
| | - Afzal Azim
- Department of Critical Care Medicine, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, 226014, India.
| | - Neeraj Sinha
- Centre of Biomedical Research, SGPGIMS Campus, Raebarelly Road, Lucknow, 226014, India.
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14
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Viswan A, Singh C, Rai RK, Azim A, Sinha N, Baronia AK. Metabolomics based predictive biomarker model of ARDS: A systemic measure of clinical hypoxemia. PLoS One 2017; 12:e0187545. [PMID: 29095932 PMCID: PMC5667881 DOI: 10.1371/journal.pone.0187545] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Accepted: 10/20/2017] [Indexed: 12/25/2022] Open
Abstract
Despite advancements in ventilator technologies, lung supportive and rescue therapies, the outcome and prognostication in acute respiratory distress syndrome (ARDS) remains incremental and ambiguous. Metabolomics is a potential insightful measure to the diagnostic approaches practiced in critical disease settings. In our study patients diagnosed with mild and moderate/severe ARDS clinically governed by hypoxemic P/F ratio between 100-300 but with indistinct molecular phenotype were discriminated employing nuclear magnetic resonance (NMR) based metabolomics of mini bronchoalveolar lavage fluid (mBALF). Resulting biomarker prototype comprising six metabolites was substantiated highlighting ARDS susceptibility/recovery. Both the groups (mild and moderate/severe ARDS) showed distinct biochemical profile based on 83.3% classification by discriminant function analysis and cross validated accuracy of 91% using partial least squares discriminant analysis as major classifier. The predictive performance of narrowed down six metabolites were found analogous with chemometrics. The proposed biomarker model consisting of six metabolites proline, lysine/arginine, taurine, threonine and glutamate were found characteristic of ARDS sub-stages with aberrant metabolism observed mainly in arginine, proline metabolism, lysine synthesis and so forth correlating to diseased metabotype. Thus NMR based metabolomics has provided new insight into ARDS sub-stages and conclusively a precise biomarker model proposed, reflecting underlying metabolic dysfunction aiding prior clinical decision making.
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Affiliation(s)
- Akhila Viswan
- Centre of Biomedical Research, Lucknow, Uttar Pradesh, India
- Faculty of Engineering and Technology, Dr. A. P. J Abdul Kalam Technical University, Lucknow, Uttar Pradesh, India
| | - Chandan Singh
- Centre of Biomedical Research, Lucknow, Uttar Pradesh, India
| | - Ratan Kumar Rai
- Centre of Biomedical Research, Lucknow, Uttar Pradesh, India
| | - Afzal Azim
- Department of Critical Care Medicine, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India
| | - Neeraj Sinha
- Centre of Biomedical Research, Lucknow, Uttar Pradesh, India
| | - Arvind Kumar Baronia
- Department of Critical Care Medicine, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India
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15
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Nonbronchoscopic Methods [Nonbronchoscopic Bronchoalveolar Lavage (BAL), Mini-BAL, Blinded Bronchial Sampling, Blinded Protected Specimen Brush] to Investigate for Pulmonary Infections, Inflammation, and Cellular and Molecular Markers: A Narrative Review. ACTA ACUST UNITED AC 2017. [DOI: 10.1097/cpm.0000000000000185] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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16
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Viswan A, Sharma RK, Azim A, Sinha N. NMR-Based Metabolic Snapshot from Minibronchoalveolar Lavage Fluid: An Approach To Unfold Human Respiratory Metabolomics. J Proteome Res 2015; 15:302-10. [PMID: 26587756 DOI: 10.1021/acs.jproteome.5b00919] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The utility of mini bronchoalveolar lavage (mBAL) and its applicability in metabolomics has not been explored in the field of human respiratory disease. mBAL, "an archetype" of the local lung environment, ensures a potent technique to get the snapshot of the epithelial lining fluid afflicted to human lung disorders. Characterization of the mBAL fluid has potential to help in elucidating the composition of the alveoli and airways in the diseased state, yielding diagnostic information on clinical applicability. In this study, one of the first attempts has been made to comprehensively assign and detect metabolites in mBAL fluid, extracted from human lungs, by the composite use of 800 MHz 1D and 2D NMR, J-resolved homonuclear spectroscopy, COSY, TOCSY, and heteronuclear HSQC correlation methods. A foremost all-inclusive sketch of the 50 metabolites has been corroborated and assigned, which can be a resourceful archive to further lung-directed metabolomics, prognosis, and diagnosis. Thus, NMR-based mBALF studies, as proposed in this article, will leverage many more prospective respiratory researches for routine clinical application and prove to be a viable approach to mirror the key predisposing factors contributing to the onset of lung disease.
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Affiliation(s)
- Akhila Viswan
- Centre of Biomedical Research , SGPGIMS Campus, Raebarelly Road, Lucknow 226014, India.,Faculty of Engineering and Technology, Dr. A. P. J Abdul Kalam Technical University , Lucknow 226021, India
| | - Raj Kumar Sharma
- Centre of Biomedical Research , SGPGIMS Campus, Raebarelly Road, Lucknow 226014, India
| | - Afzal Azim
- Department of Critical Care Medicine, Sanjay Gandhi Postgraduate Institute of Medical Sciences , Lucknow 226014, India
| | - Neeraj Sinha
- Centre of Biomedical Research , SGPGIMS Campus, Raebarelly Road, Lucknow 226014, India
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Faro A, Wood RE, Schechter MS, Leong AB, Wittkugel E, Abode K, Chmiel JF, Daines C, Davis S, Eber E, Huddleston C, Kilbaugh T, Kurland G, Midulla F, Molter D, Montgomery GS, Retsch-Bogart G, Rutter MJ, Visner G, Walczak SA, Ferkol TW, Michelson PH. Official American Thoracic Society Technical Standards: Flexible Airway Endoscopy in Children. Am J Respir Crit Care Med 2015; 191:1066-80. [DOI: 10.1164/rccm.201503-0474st] [Citation(s) in RCA: 89] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
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18
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Frota OP, Ferreira AM, Barcelos LDS, Watanabe E, Carvalho NCP, Rigotti MA. [Collection of tracheal aspirate: safety and microbiological concordance between two techniques]. Rev Esc Enferm USP 2015; 48:618-24. [PMID: 25338241 DOI: 10.1590/s0080-623420140000400007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2014] [Accepted: 06/12/2014] [Indexed: 01/16/2023] Open
Abstract
OBJECTIVE To evaluate the safety of the performance of the traditional and protected collection techniques of tracheal aspirate and to identify qualitative and quantitative agreement of the results of microbiological cultures between the techniques. METHOD Clinical, prospective, comparative, single-blind research. The sample was composed of 54 patients of >18 years of age, undergoing invasive mechanical ventilation for a period of ≥ 48 hours and with suspected Ventilator Associated Pneumonia. The two techniques were implemented in the same patient, one immediately after the other, with an order of random execution, according to randomization by specialized software. RESULTS No significant events occurred oxygen desaturation, hemodynamic instability or tracheobronchial hemorrhage (p<0.05) and, although there were differences in some strains, there was qualitative and quantitative agreement between the techniques (p<0.001). CONCLUSION Utilization of the protected technique provided no advantage over the traditional and execution of both techniques was safe for the patient.
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Affiliation(s)
| | | | | | - Evandro Watanabe
- College of Odontology of Ribeirão Preto, University of Sao Paulo, Ribeirão Preto, SP, Brazil
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19
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Singh C, Rai RK, Azim A, Sinha N, Baronia AK. Search for biomarkers in critically ill patients: a new approach based on nuclear magnetic resonance spectroscopy of mini-bronchoalveolar lavage fluid. CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2014; 18:594. [PMID: 25672613 PMCID: PMC4237762 DOI: 10.1186/s13054-014-0594-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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20
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Aydogan M, Balta S, Demirkol S, Cakar M, Kucuk U, Gumus S. Pentraxin 3: An early marker of severity in higher mortality disease. Heart Lung 2013; 42:155-6. [DOI: 10.1016/j.hrtlng.2012.12.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2012] [Accepted: 12/31/2012] [Indexed: 12/01/2022]
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21
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Gupta D, Agarwal R, Aggarwal AN, Singh N, Mishra N, Khilnani GC, Samaria JK, Gaur SN, Jindal SK. Guidelines for diagnosis and management of community- and hospital-acquired pneumonia in adults: Joint ICS/NCCP(I) recommendations. Lung India 2012; 29:S27-62. [PMID: 23019384 PMCID: PMC3458782 DOI: 10.4103/0970-2113.99248] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Affiliation(s)
- Dheeraj Gupta
- Department of Pulmonary Medicine, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - Ritesh Agarwal
- Department of Pulmonary Medicine, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - Ashutosh Nath Aggarwal
- Department of Pulmonary Medicine, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - Navneet Singh
- Department of Pulmonary Medicine, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - Narayan Mishra
- Department of Pulmonary Medicine, Indian Chest Society, India
| | - G. C. Khilnani
- Department of Pulmonary Medicine, National College of Chest Physicians, India
| | - J. K. Samaria
- Department of Pulmonary Medicine, Indian Chest Society, India
| | - S. N. Gaur
- Department of Pulmonary Medicine, National College of Chest Physicians, India
| | - S. K. Jindal
- Department of Pulmonary Medicine, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - for the Pneumonia Guidelines Working Group
- Pneumonia Guidelines Working Group Collaborators (43) A. K. Janmeja, Chandigarh; Abhishek Goyal, Chandigarh; Aditya Jindal, Chandigarh; Ajay Handa, Bangalore; Aloke G. Ghoshal, Kolkata; Ashish Bhalla, Chandigarh; Bharat Gopal, Delhi; D. Behera, Delhi; D. Dadhwal, Chandigarh; D. J. Christopher, Vellore; Deepak Talwar, Noida; Dhruva Chaudhry, Rohtak; Dipesh Maskey, Chandigarh; George D’Souza, Bangalore; Honey Sawhney, Chandigarh; Inderpal Singh, Chandigarh; Jai Kishan, Chandigarh; K. B. Gupta, Rohtak; Mandeep Garg, Chandigarh; Navneet Sharma, Chandigarh; Nirmal K. Jain, Jaipur; Nusrat Shafiq, Chandigarh; P. Sarat, Chandigarh; Pranab Baruwa, Guwahati; R. S. Bedi, Patiala; Rajendra Prasad, Etawa; Randeep Guleria, Delhi; S. K. Chhabra, Delhi; S. K. Sharma, Delhi; Sabir Mohammed, Bikaner; Sahajal Dhooria, Chandigarh; Samir Malhotra, Chandigarh; Sanjay Jain, Chandigarh; Subhash Varma, Chandigarh; Sunil Sharma, Shimla; Surender Kashyap, Karnal; Surya Kant, Lucknow; U. P. S. Sidhu, Ludhiana; V. Nagarjun Mataru, Chandigarh; Vikas Gautam, Chandigarh; Vikram K. Jain, Jaipur; Vishal Chopra, Patiala; Vishwanath Gella, Chandigarh
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