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Maskay SS, Shrestha N, Bastola P, Pradhan B, Shrestha A. Ultrasonography Imaging versus Waveform Capnography in Detecting Endotracheal Tube Placement during Intubation at a Tertiary Hospital. J Med Ultrasound 2024; 32:70-75. [PMID: 38665336 PMCID: PMC11040478 DOI: 10.4103/jmu.jmu_98_22] [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: 09/26/2022] [Revised: 02/01/2023] [Accepted: 03/08/2023] [Indexed: 04/28/2024] Open
Abstract
Background There is continued research to find new faster, highly accurate, easily accessible, and portable methods of confirming endotracheal tube position during intubation. A newer modality for visualizing endotracheal tube location is transtracheal or transcricothyroid ultrasonography. The aim of this study was to see if ultrasound machine can also be routinely used for the confirmation of endotracheal tube position in operating theaters along with capnograph. Methods The study was observational and prospective, conducted from January 2017 to July 2017. Study locations were at the Tribhuvan University Teaching Hospital and Manmohan Cardiothoracic Vascular and Transplant Center operating rooms. Sample size taken was 95. Results In the study, 11 patients had esophageal intubation out of the 95. The accuracy of both ultrasonography and capnography was found to be 96.84%. For ultrasonography, the sensitivity, specificity, along with positive predictive value and negative predictive value were 97.62%, 90.91%, 98.80%, and 83.33%, respectively, while that for capnography were found to be 96.43%, 100%, 100%, and 78.57%, respectively. The kappa value was calculated to be 0.749, which suggested the degree of agreement of result between the methods to be good. Compared to capnography, ultrasonography was found to be significantly faster for the confirmation of endotracheal tube location by 16.36 s (15.70-17.02) (P = 0.011). Conclusion Both waveform capnography and ultrasonography were found to be accurate and reliable in confirming endotracheal tube location. The use of ultrasound during intubation can help confirm endotracheal tube location faster and also aid in precision when used along with capnography. Manual bag ventilations are not necessary when confirming endotracheal tube position by ultrasonography and thus may help in preventing aspiration of gastric contents into the lungs of the patient.
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Affiliation(s)
- Shirish Shakti Maskay
- Department of Anesthesiology, Indira Gandhi Memorial Hospital, Male, Maldives
- Department of Anesthesiology, Tribhuvan University Teaching Hospital, Institute of Medicine, Tribhuvan University, Kathmandu, Nepal
| | - Ninadini Shrestha
- Department of Anesthesiology, Tribhuvan University Teaching Hospital, Institute of Medicine, Tribhuvan University, Kathmandu, Nepal
| | - Priska Bastola
- Department of Cardiothoracic and Vascular Anesthesiology, Manmohan Cardiothoracic Transplant and Vascular Centre, Institute of Medicine, Tribhuvan University, Kathmandu, Nepal
| | - Bishwas Pradhan
- Department of Cardiothoracic and Vascular Anesthesiology, Manmohan Cardiothoracic Transplant and Vascular Centre, Institute of Medicine, Tribhuvan University, Kathmandu, Nepal
| | - Anil Shrestha
- Department of Anesthesiology, Tribhuvan University Teaching Hospital, Institute of Medicine, Tribhuvan University, Kathmandu, Nepal
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Malamal Pradeep S, Ann Benny H. Comparison of Upper Airway Ultrasonography Against Quantitative Waveform Capnography for Validating Endotracheal Tube Position in a South Indian Population. Cureus 2024; 16:e52628. [PMID: 38374868 PMCID: PMC10875400 DOI: 10.7759/cureus.52628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Accepted: 01/19/2024] [Indexed: 02/21/2024] Open
Abstract
INTRODUCTION The utilization of ultrasonography (USG) is progressively growing to verify the accurate positioning of the endotracheal tube (ETT). Non-detection of the esophageal intubation can be fatal. Various techniques are employed to confirm the placement of the ETT, but none of them are considered optimal. Quantitative waveform capnography (qWC) is often regarded as the most reliable method for this purpose; however, it may not necessarily be accessible and can be expensive. Hence, this investigation was carried out to contrast the use of bedside upper airway USG with qWC in order to confirm the accurate positioning of the ETT following intubation. Methods: A prospective validation study was undertaken in the emergency department (ED) of Lourdes Hospital, Kochi. This study includes subjects who are of the age group >18 years of either sex requiring intubation in the ED for causes like respiratory failure, cardiac arrest, coma, head injury, and poisoning and cases in which intubation was achieved in the first attempt. The sample size calculated was 77. Intubation in our ED includes both elective and emergency. For all the patients undergoing intubation, consent was taken before the procedure (from close relatives of the patients) by another staff after explaining the procedure to be conducted by the doctor. Following the acquisition of consent, the intubation procedure was executed in accordance with the established hospital protocol. This protocol included verifying the intubation's success as well as employing clinical techniques such as observing bilateral chest expansion, conducting a five-point auscultation, and monitoring pulse oximetry. Furthermore, USG was employed to assess the positioning of the ETT placement. The time taken by each of these methods to confirm tube placement was noted, and the findings were assessed for the sensitivity (SN) and specificity (SP) of USG against the gold standard qWC to confirm endotracheal intubation. RESULTS Eighty patients were enrolled in the study. All 80 patients were subjected to both ultrasound and end-tidal carbon dioxide (EtCO2). Of the 80 patients, six subjects (7.5%) underwent esophageal intubation, which was observed through the use of USG. Four patients had esophageal intubations and were correctly detected by EtCO2. All four esophageal intubations were correctly confirmed by EtCO2. Additionally, USG detected six intubations, out of which four were true and two were tracheal which was correctly confirmed by EtCO2. The bedside upper airway USG demonstrated an SN of 78 subjects at 97.4% (95% CI: 90.8-99.7%), an SP of 80 subjects at 100% (95% CI: 39.7-100%), a positive predictive value of 80 subjects at 100% (95% CI: 93.8-100%), and a negative predictive value of 53 subjects at 66.7% (95% CI: 33.7-88.7%). A positive test had an infinite likelihood ratio, whereas a negative test had a likelihood ratio of 0.03 (95% CI: 0.01-0.10). The average duration for confirmation by USG was 10.10 seconds. Conclusion: The study's outcomes highlight the importance of incorporating USG into the clinical toolkit of ED physicians, ultimately contributing to enhanced patient safety and the optimization of endotracheal intubation procedures in the ED.
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Affiliation(s)
| | - Honey Ann Benny
- Department of Emergency Medicine, Jubilee Mission Medical College and Research Institute, Thrissur, IND
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Choi W, Cho YS, Ha YR, Oh JH, Lee H, Kang BS, Kim YW, Koh CY, Lee JH, Jung E, Sohn Y, Kim HB, Kim SJ, Kim H, Suh D, Lee DH, Hong JY, Lee WW. Role of point-of-care ultrasound in critical care and emergency medicine: update and future perspective. Clin Exp Emerg Med 2023; 10:363-381. [PMID: 38225778 PMCID: PMC10790072 DOI: 10.15441/ceem.23.101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Revised: 10/01/2023] [Accepted: 10/05/2023] [Indexed: 01/17/2024] Open
Abstract
Point-of-care ultrasound (POCUS) is a rapidly developing technology that has the potential to revolutionize emergency and critical care medicine. The use of POCUS can improve patient care by providing real-time clinical information. However, appropriate usage and proper training are crucial to ensure patient safety and reliability. This article discusses the various applications of POCUS in emergency and critical care medicine, the importance of training and education, and the future of POCUS in medicine.
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Affiliation(s)
- Wookjin Choi
- Department of Emergency Medicine, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea
| | - Young Soon Cho
- Department of Emergency Medicine, Soonchunhyang University Bucheon Hospital, Bucheon, Korea
| | - Young Rock Ha
- Department of Intensive Care Medicine, Seongnam Citizens Medical Center, Seongnam, Korea
| | - Je Hyeok Oh
- Department of Emergency Medicine, Chung-Ang University College of Medicine, Seoul, Korea
| | - Heekyung Lee
- Department of Emergency Medicine, Hanyang University Guri Hospital, Hanyang University College of Medicine, Guri, Korea
| | - Bo Seung Kang
- Department of Emergency Medicine, Hanyang University Guri Hospital, Hanyang University College of Medicine, Guri, Korea
| | - Yong Won Kim
- Department of Emergency Medicine, Dongguk University Ilsan Hospital, Dongguk University College of Medicine, Goyang, Korea
| | - Chan Young Koh
- Department of Emergency Medicine, Dankook University College of Medicine, Cheonan, Korea
| | - Ji Han Lee
- Department of Emergency Medicine, Uijeongbu St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Uijeongbu, Korea
| | - Euigi Jung
- Department of Emergency Medicine, VHS Medical Center, Seoul, Korea
| | - Youdong Sohn
- Department of Emergency Medicine, Kangdong Sacred Heart Hospital, Hallym University, Seoul, Korea
| | - Han Bit Kim
- Department of Emergency Medicine, Soonchunhyang University Bucheon Hospital, Bucheon, Korea
| | - Su Jin Kim
- Department of Emergency Medicine, Korea University College of Medicine, Seoul, Korea
| | - Hohyun Kim
- Department of Trauma and Surgical Critical Care, Pusan National University Hospital, Pusan National University School of Medicine, Busan, Korea
| | - Dongbum Suh
- Department of Emergency Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Dong Hyun Lee
- Department of Intensive Care Medicine, Dong-A University Hospital, Dong-A University College of Medicine, Busan, Korea
| | - Ju Young Hong
- Department of Emergency Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - Won Woong Lee
- Department of Intensive Care Medicine, Seongnam Citizens Medical Center, Seongnam, Korea
| | - on behalf of the Society Emergency and Critical Care Imaging (SECCI)
- Department of Emergency Medicine, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea
- Department of Emergency Medicine, Soonchunhyang University Bucheon Hospital, Bucheon, Korea
- Department of Intensive Care Medicine, Seongnam Citizens Medical Center, Seongnam, Korea
- Department of Emergency Medicine, Chung-Ang University College of Medicine, Seoul, Korea
- Department of Emergency Medicine, Hanyang University Guri Hospital, Hanyang University College of Medicine, Guri, Korea
- Department of Emergency Medicine, Dongguk University Ilsan Hospital, Dongguk University College of Medicine, Goyang, Korea
- Department of Emergency Medicine, Dankook University College of Medicine, Cheonan, Korea
- Department of Emergency Medicine, Uijeongbu St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Uijeongbu, Korea
- Department of Emergency Medicine, VHS Medical Center, Seoul, Korea
- Department of Emergency Medicine, Kangdong Sacred Heart Hospital, Hallym University, Seoul, Korea
- Department of Emergency Medicine, Korea University College of Medicine, Seoul, Korea
- Department of Trauma and Surgical Critical Care, Pusan National University Hospital, Pusan National University School of Medicine, Busan, Korea
- Department of Emergency Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
- Department of Intensive Care Medicine, Dong-A University Hospital, Dong-A University College of Medicine, Busan, Korea
- Department of Emergency Medicine, Yonsei University College of Medicine, Seoul, Korea
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Mirunalini G, Kuppusamy A, Koka M, Ramamurthy B. Comparison of real-time ultrasound with capnography to confirm endotracheal tube position in patients in critical care unit—A cross-sectional study. BALI JOURNAL OF ANESTHESIOLOGY 2022. [DOI: 10.4103/bjoa.bjoa_171_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Farrokhi M, Yarmohammadi B, Mangouri A, Hekmatnia Y, Bahramvand Y, Kiani M, Nasrollahi E, Nazari-Sabet M, Manoochehri-Arash N, Khurshid M, Mosalanejad S, Hajizadeh V, Amani-Beni R, Moallem M, Farahmandsadr M. Screening Performance Characteristics of Ultrasonography in Confirmation of Endotracheal Intubation; a Systematic Review and Meta-analysis. ARCHIVES OF ACADEMIC EMERGENCY MEDICINE 2021; 9:e68. [PMID: 34870234 PMCID: PMC8628646 DOI: 10.22037/aaem.v9i1.1360] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Introduction: Recent studies have suggested that point-of-care ultrasonography can be used for confirming the placement of endotracheal tube. This systematic review and meta-analysis aimed to investigate the sensitivity and specificity of ultrasonography for confirming endotracheal tube placement. Methods: In this meta-analysis, systematic search of the previous published papers investigating the diagnostic accuracy of ultrasonography for confirmation of endotracheal tube placement was performed. Seven electronic databases, including PubMed, Scopus, Google Scholar, EBSCO, EMBASE, Web of Science, and Cochrane Database were searched up to July 2021, for all relevant articles published in English on this topic. Meta-DiSc version 1.4 software was used for statistical analysis. Results: The estimated pooled sensitivity and specificity of ultrasonography for confirmation of endotracheal tube location were 0.98 (95% CI: 0.98–0.99) and 0.94 (95% CI 0.91–0.96), respectively. The pooled positive likelihood ratio and negative likelihood ratio were 5.94 (95% CI 4.41–7.98) and 0.03 (95% CI: 0.02-0.04), respectively. The diagnostic odds ratio of ultrasonography was 281.47 and the area under hierarchical summary receiver operating characteristic (HSROC) revealed an appropriate accuracy of 0.98. Conclusion: Ultrasonography has high diagnostic accuracy and can be used as a promising tool for confirmation of endotracheal tube placement, especially in critically ill patients or when capnography is not available, or its result is equivocal.
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Affiliation(s)
| | - Bardia Yarmohammadi
- School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Amir Mangouri
- Department of Vascular and Endovascular Surgery, Sina Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Yasaman Hekmatnia
- Islamic Azad University, Sari Branch, School of Medicine, Sari, Iran
| | - Yaser Bahramvand
- School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Moein Kiani
- School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Elham Nasrollahi
- School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Milad Nazari-Sabet
- Department of General Surgery, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Niusha Manoochehri-Arash
- Endocrine Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Maria Khurshid
- Department of Internal Medicine, Berkshire Medical Center, Pittsfield, Massachusetts, USA
| | - Shima Mosalanejad
- Department of Internal Medicine, Faculty of Medicine, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Vida Hajizadeh
- School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Reza Amani-Beni
- School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Masoumeh Moallem
- Department of Emergency Medicine, School of Medicine, Tehran Medical Sciences Branch, Islamic Azad University, Tehran, Iran
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Schrift D, Barron K, Arya R, Choe C. The Use of POCUS to Manage ICU Patients With COVID-19. JOURNAL OF ULTRASOUND IN MEDICINE : OFFICIAL JOURNAL OF THE AMERICAN INSTITUTE OF ULTRASOUND IN MEDICINE 2021; 40:1749-1761. [PMID: 33174650 DOI: 10.1002/jum.15566] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 10/12/2020] [Accepted: 10/15/2020] [Indexed: 06/11/2023]
Abstract
Since the advent of SARS-CoV-2, the virus that causes COVID-19, clinicians have had to modify how they provide high-value care while mitigating the risk of viral spread. Routine imaging studies have been discouraged due to elevated transmission risk. Patients who have been diagnosed with COVID-19 often have a protracted hospital course with progression of disease. Given the need for close follow-up of patients, we recommend the use of ultrasonography, particularly point-of-care ultrasound (POCUS), to manage patients with COVID-19 through their entire ICU course. POCUS will allow a clinician to evaluate and monitor cardiac and pulmonary function, as well as evaluate for thromboembolic disease, place an endotracheal tube, confirm central venous catheter placement, and rule out a pneumothorax. If a patient improves sufficiently to perform weaning trials, POCUS can also help evaluate readiness for ventilator liberation.
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Affiliation(s)
- David Schrift
- Division of Pulmonary, Critical Care, and Sleep Medicine, Prisma Health USC Medical Group, Columbia, South Carolina, USA
| | - Keith Barron
- Department of Internal Medicine, Prisma Health USC Medical Group, Columbia, South Carolina, USA
| | - Rohan Arya
- Division of Pulmonary, Critical Care, and Sleep Medicine, Prisma Health USC Medical Group, Columbia, South Carolina, USA
| | - Carol Choe
- Department of Critical Care Medicine, Lexington Medical Center, West Columbia, South Carolina, USA
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Zetlaoui PJ. Ultrasonography for airway management. Anaesth Crit Care Pain Med 2021; 40:100821. [PMID: 33722741 DOI: 10.1016/j.accpm.2021.100821] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 10/31/2020] [Accepted: 10/31/2020] [Indexed: 11/28/2022]
Abstract
Ultrasonography (USG) allows a new approach to the airway in anaesthesia and intensive care. USG visualises the airway from the mouth to the lungs. By exploring the entire airway, USG proposes new criteria (1) to assess the risk of difficult laryngoscopy, (2) to anticipate the management of a difficult airway, (3) to confirm the position of the endotracheal tube (ETT), and (4) to confirm that the lungs are effectively ventilated. Intraoperatively, USG may also help to resolve acute ventilatory problems such as pneumothorax, delayed selective bronchial intubation after patient positioning (Trendelenburg, prone or lateral position) or acute pulmonary oedema.
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Affiliation(s)
- Paul J Zetlaoui
- Département d'Anesthésie-Réanimation, Hôpital de Bicêtre, Université Paris-Orsay, 48, Rue du Général Leclerc, 94270 Le Kremlin-Bicêtre, France.
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Ability of Critical Care Medics to Confirm Endotracheal Tube Placement by Ultrasound. Prehosp Disaster Med 2020; 35:629-631. [PMID: 32838826 DOI: 10.1017/s1049023x20001004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
INTRODUCTION The Advanced Cardiac Life Support (ACLS) guidelines were recently updated to include ultrasound confirmation of endotracheal tube (ETT) location as an adjunctive tool to verify placement. While this method is employed in the emergency department under the guidance of the most recent American College of Emergency Physicians (ACEP; Irving, Texas USA) guidelines, it has yet to gain wide acceptance in the prehospital setting where it has the potential for greater impact. The objective of this study to is determine if training critical care medics using simulation was a feasible and reliable method to learn this skill. METHODS Twenty critical care paramedics with no previous experience with point-of-care ultrasound volunteered for advanced training in prehospital ultrasound. Four ultrasound fellowship trained emergency physicians proctored two three-hour training sessions. Each session included a brief introduction to ultrasound "knobology," normal sonographic neck and lung anatomy, and how to identify ETT placement within the trachea or esophagus. Immediately following this, the paramedics were tested with five simulated case scenarios using pre-obtained images that demonstrated a correctly placed ETT, an esophageal intubation, a bronchial intubation, and an improperly functioning ETT. Their accuracy, length of time to respond, and comfort with using ultrasound were all assessed. RESULTS All 20 critical care medics completed the training and testing session. During the five scenarios, 37/40 (92.5%) identified the correct endotracheal placements, 18/20 (90.0%) identified the esophageal intubations, 18/20 (90.0%) identified the bronchial intubation, and 20/20 (100.0%) identified the ETT malfunctions correctly. The average time to diagnosis was 10.6 seconds for proper placement, 15.5 seconds for esophageal, 15.6 seconds for bronchial intubation, and 11.8 seconds for ETT malfunction. CONCLUSIONS The use of ultrasound to confirm ETT placement can be effectively taught to critical care medics using a short, simulation-based training session. Further studies on implementation into patient care scenarios are needed.
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Endotracheal Tube Placement Confirmation by Ultrasonography: A Systematic Review and Meta-Analysis of more than 2500 Patients. J Emerg Med 2020; 59:254-264. [DOI: 10.1016/j.jemermed.2020.04.040] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 04/02/2020] [Accepted: 04/08/2020] [Indexed: 12/22/2022]
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Kaminski A, Dike NO, Bachista K, Boniface M, Dove C, Simon LV. Differences Between Esophageal and Tracheal Intubation Ultrasound View Proficiency: An Educational Study of Novice Prehospital Providers. Cureus 2020; 12:e8686. [PMID: 32699685 PMCID: PMC7370683 DOI: 10.7759/cureus.8686] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Objectives Airway ultrasound is now possible in the prehospital setting due to advances in ultrasound equipment portability. We questioned how well prehospital providers without prior experience could determine both esophageal and tracheal placement of an endotracheal tube in cadavers after a brief training course in ultrasound. Methods This educational prospective study at the Simulation Center in Mayo Clinic Jacksonville Florida enrolled 50 prehospital providers. Demographic and practice background information was obtained through surveys. Each participant performed a baseline ultrasound to determine endotracheal tube placement in a cadaver that was randomly assigned to an esophageal or tracheal intubation. Participants then repeated the randomized testing after a 15-minute tutorial. Before and after overall accuracy as well as proportions of correct identification of esophageal and tracheal intubations were determined and compared using standard binomial proportion and McNemar’s tests. Results None of the participants had prior experience of performing airway ultrasound. Baseline group scores were 60% (CI 45%-74%) for overall accuracy (n=50), 55% (CI 32%-76%) for correct identification of an esophageal intubation, and 64% (CI 44%-81%) for correct tracheal detection. Baseline scores were not significantly different from standard binomial distributions. Post-test scores were 82% (CI 69%-91%) for overall accuracy, 96% (CI 80%-100%) for esophageal intubation detection, and 66.7% (CI 45%-84%) for tracheal intubation detection, with corresponding binomial p-values of <0.001, <0.001, and 0.15. P-values for McNemar’s paired test for combined overall accuracy, correct esophageal detection, and correct tracheal detection were 0.04, 0.02, and 0.62, respectively. Conclusions Prehospital participants without prior ultrasound experience demonstrated significant gains in airway ultrasound proficiency after a limited introductory course. Post-training score increases were largely due to a notable increase in correct esophageal intubation detection rates. Learners did not make significant progress in correctly identifying a tracheal intubation. Airway ultrasound educational design may benefit from added emphasis on the potentially more difficult to recognize tracheal intubation view.
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Affiliation(s)
- Ann Kaminski
- Emergency Medicine, Mayo Clinic, Jacksonville, USA
| | - Nkechi O Dike
- Emergency Medicine/Clinical Anatomy, University of Cape Coast, Cape Coast, GHA
| | - Kerry Bachista
- Emergency Medicine, Baptist Medical Center, Jacksonville, USA
| | | | | | - Leslie V Simon
- Emergency Medicine/Medical Simulation, Mayo Clinic, Jacksonville, USA
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11
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Chowdhury AR, Punj J, Pandey R, Darlong V, Sinha R, Bhoi D. Ultrasound is a reliable and faster tool for confirmation of endotracheal intubation compared to chest auscultation and capnography when performed by novice anaesthesia residents - A prospective controlled clinical trial. Saudi J Anaesth 2020; 14:15-21. [PMID: 31998014 PMCID: PMC6970360 DOI: 10.4103/sja.sja_180_19] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Accepted: 05/02/2019] [Indexed: 11/04/2022] Open
Abstract
Background Anesthesia trainee may initially take longer time to intubate and unintentionally place the endotracheal tube (ETT) in the esophagus. The present study determined if ultrasound is the fastest method of confirmation of correct placement of ETT compared to capnography, and chest auscultation in trainees. Methods First year anesthesia residents performed intubation in 120 patients recruited after ethical clearance and informed consent. Time to visualize flutter in trachea, double trachea sign, time to appearance of first and sixth capnography, and time to execute chest auscultation was noted. Results Ultrasonography was statistically fastest method to determine endotracheal intubation (36.50 ± 15.14 seconds) vs unilateral chest auscultation (50.29 ± 15.50 seconds) vs bilateral chest auscultation (51.90 ± 15.98 seconds) vs capnography first waveform (53.57 ± 15.97 seconds) vs capnography sixth waveform (61.67 ± 15.88 seconds). Conclusion When teaching endotracheal intubation to novice anesthesia residents using conventional direct laryngoscopy, ultrasonography is the fastest method to confirm correct ETT placement compared to capnograph and chest auscultation. Mentor can guide trainee to direct ETT towards trachea and can promptly detect esophageal intubation by double trachea sign.
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Affiliation(s)
- Apala Roy Chowdhury
- Department of Anesthesiology, All India Institute of Medical Sciences, New Delhi, India
| | - Jyotsna Punj
- Department of Anesthesiology, All India Institute of Medical Sciences, New Delhi, India
| | - R Pandey
- Department of Anesthesiology, All India Institute of Medical Sciences, New Delhi, India
| | - V Darlong
- Department of Anesthesiology, All India Institute of Medical Sciences, New Delhi, India
| | - Renu Sinha
- Department of Anesthesiology, All India Institute of Medical Sciences, New Delhi, India
| | - D Bhoi
- Department of Anesthesiology, All India Institute of Medical Sciences, New Delhi, India
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Chen W, Chen J, Wang H, Chen Y. Application of bedside real-time tracheal ultrasonography for confirmation of emergency endotracheal intubation in patients in the intensive care unit. J Int Med Res 2019; 48:300060519894771. [PMID: 31880180 PMCID: PMC7783275 DOI: 10.1177/0300060519894771] [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] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE Critically ill patients often require emergency endotracheal intubation and mechanical ventilation. When esophageal intubation is not confirmed early, treatment may be delayed, even for life-threatening conditions. We examined the accuracy of bedside real-time airway ultrasonography in confirming the endotracheal tube (ETT) position during emergency endotracheal intubation in patients in the intensive care unit (ICU). METHODS This single-center prospective observational study included 118 patients who underwent urgent endotracheal intubation in the ICU of Taizhou Hospital of Integrated Traditional Chinese and Western Medicine. Tracheal ultrasonography was used to confirm the ETT position during endotracheal intubation, after which fiberoptic bronchoscopy was performed. The accuracy of bedside real-time tracheal ultrasonography in determining the ETT position was examined. RESULTS Twelve (10.2%) patients underwent endotracheal intubation. The kappa value was 0.844, indicating perfect consistency between tracheal ultrasonography and fiberoptic bronchoscopy in identifying esophageal intubation. The sensitivity, specificity, and positive and negative predictive values of tracheal ultrasonography in determining the ETT position were 75.0%, 100%, 100%, and 97.2%, respectively. CONCLUSIONS Bedside real-time tracheal ultrasonography accurately assesses the ETT position in the ICU and can identify the ETT position during intubation. These findings have important clinical applications and are of great significance for treatment of ICU patients.
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Affiliation(s)
- Weiting Chen
- Intensive Care Unit, Taizhou Integrated Chinese and Western Medicine Hospital, Wenling, Zhejiang Province, China
| | - Junbo Chen
- Emergency Medical, Taizhou Integrated Chinese and Western Medicine Hospital, Wenling, Zhejiang Province, China
| | - Hehao Wang
- Intensive Care Unit, Taizhou Integrated Chinese and Western Medicine Hospital, Wenling, Zhejiang Province, China
| | - Yingzi Chen
- Intensive Care Unit, Taizhou Integrated Chinese and Western Medicine Hospital, Wenling, Zhejiang Province, China
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Prada G, Vieillard-Baron A, Martin AK, Hernandez A, Mookadam F, Ramakrishna H, Diaz-Gomez JL. Tracheal, Lung, and Diaphragmatic Applications of M-Mode Ultrasonography in Anesthesiology and Critical Care. J Cardiothorac Vasc Anesth 2019; 35:310-322. [PMID: 31883769 DOI: 10.1053/j.jvca.2019.11.051] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Accepted: 11/24/2019] [Indexed: 11/11/2022]
Abstract
Today, proficiency in cardiopulmonary ultrasound is considered essential for anesthesiologists and critical care physicians. Conventional 2-dimensional images, however, do not permit optimal characterization of specific conditions (eg, diaphragmatic paralysis, major atelectasis, and pneumothorax) that may have relevant clinical implications in critical care and perioperative settings. By contrast, M-mode (motion-based) ultrasonographic imaging modality offers the highest temporal resolution in ultrasonography; this modality, therefore, can provide important information in ultrasound-driven approaches performed by anesthesiologists and intensivists for diagnosis, monitoring, and procedural guidance. Despite its practicability, M-mode has been progressively abandoned in echocardiography and is often underused in lung and diaphragmatic ultrasound. This review describes contemporary applications of M-mode ultrasonography in the practice of critical care and perioperative medicine. Information presented for each clinical application includes image acquisition and interpretation, evidence-based clinical implications in critically ill and surgical patients, and main limitations. The article focuses on tracheal, lung, and diaphragmatic ultrasound. It reviews tracheal ultrasound for procedural guidance during endotracheal intubation, confirmation of correct tube placement, and detection of esophageal intubation; lung ultrasound for the confirmation of endotracheal and endobronchial (selective) intubation and for the diagnosis of pneumothorax, alveolar-interstitial syndrome (cardiogenic v noncardiogenic pulmonary edema), pulmonary consolidation (pneumonia v major atelectasis) and pleural effusion; and diaphragmatic ultrasound for the diagnosis of diaphragmatic dysfunction and prediction of extubation success.
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Affiliation(s)
- Gabriel Prada
- Department of Critical Care Medicine, Mayo Clinic, Jacksonville, FL
| | - Antoine Vieillard-Baron
- Intensive Care Unit, Assistance Publique-Hôpitaux de Paris, University Hospital Ambroise Paré, Boulogne Billancourt, France; Faculty of Medicine Paris Ile de France Ouest, University of Versailles Saint-Quentin en Yvelines, Saint Quentin En Yvelines, France; INSERM U-1018, CESP, Team 5, University of Versailles Saint-Quentin en Yvelines, Villejuif, France
| | - Archer K Martin
- Department of Anesthesiology and Perioperative Medicine, Mayo Clinic, Jacksonville, FL
| | - Antonio Hernandez
- Department of Anesthesiology, Vanderbilt University Medical Center, Nashville, TN
| | - Farouk Mookadam
- Department of Cardiovascular Diseases, Mayo Clinic, Scottsdale, AZ
| | - Harish Ramakrishna
- Department of Anesthesiology and Perioperative Medicine, Mayo Clinic Hospital, Phoenix, AZ.
| | - Jose L Diaz-Gomez
- Department of Critical Care Medicine, Mayo Clinic, Jacksonville, FL; Department of Anesthesiology and Perioperative Medicine, Mayo Clinic, Jacksonville, FL; Department of Neurologic Surgery, Mayo Clinic, Jacksonville, FL
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Moghawri MWS, Zayed NE, Ibrahim DA. Reliability of ultrasound in confirming endotracheal tube placement as a new and fast tool. THE EGYPTIAN JOURNAL OF BRONCHOLOGY 2019. [DOI: 10.4103/ejb.ejb_79_19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Current Concepts in the Management of the Difficult Pediatric Airway. CURRENT ANESTHESIOLOGY REPORTS 2019. [DOI: 10.1007/s40140-019-00319-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Sethi AK, Salhotra R, Chandra M, Mohta M, Bhatt S, Kayina CA. Confirmation of placement of endotracheal tube - A comparative observational pilot study of three ultrasound methods. J Anaesthesiol Clin Pharmacol 2019; 35:353-358. [PMID: 31543584 PMCID: PMC6748007 DOI: 10.4103/joacp.joacp_317_18] [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] [Indexed: 11/04/2022] Open
Abstract
Background and Aims Confirmation of endotracheal tube (ETT) position is necessary to ensure proper ventilation. The present study was conducted with the aim to compare the efficacy of three ultrasonographic (USG) techniques in terms of time taken for confirmation of ETT position. The time taken by each USG technique was also compared with that for auscultation and capnography. The ability of the three USG techniques to identify tracheal placement of ETT was evaluated in all patients. Material and Methods Ninety adult American Society of Anesthesiologists (ASA) I/II patients requiring general anaesthesia with tracheal intubation were randomised into three groups (n = 30 each) depending upon the initial USG transducer position used to confirm tracheal placement of ETT: group T (tracheal), group P (pleural) and group D (diaphragm). The time taken for confirmation of tracheal placement of ETT by USG, auscultation and capnography was recorded for each of the groups. Subsequently, USG confirmation of ETT placement was performed with the other two USG techniques in all patients. Results The time taken for USG in group T was significantly less (3.8 ± 0.9 s) compared to group P (12.1 ± 1.6 s) and group D (13.8 ± 1.7 s); P < 0.001. USG was significantly faster than both auscultation and capnography in group T (P < 0.001), whereas in group P and group D, USG took longer time compared to auscultation (P = 0.014 and P < 0.001, respectively) but lesser time than capnography (P < 0.001 in both groups). Conclusion USG is a rapid technique for identification of ETT placement. All the three USG techniques are reliable in identifying the tracheal placement of ETT.
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Affiliation(s)
- Ashok K Sethi
- Department of Anaesthesiology and Critical Care, University College of Medical Sciences and Guru Teg Bahadur Hospital, Delhi, India
| | - Rashmi Salhotra
- Department of Anaesthesiology and Critical Care, University College of Medical Sciences and Guru Teg Bahadur Hospital, Delhi, India
| | - Monika Chandra
- Department of Anaesthesiology, Maulana Azad Medical College and LN Hospital, Delhi, India
| | - Medha Mohta
- Department of Anaesthesiology and Critical Care, University College of Medical Sciences and Guru Teg Bahadur Hospital, Delhi, India
| | - Shuchi Bhatt
- Department of Radiodiagnosis, University College of Medical Sciences and Guru Teg Bahadur Hospital, Delhi, India
| | - Choro A Kayina
- Department of Anaesthesiology, All India Institute of Medical Sciences, Delhi, India
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Abstract
OBJECTIVES Rapid identification of esophageal intubations is critical to avoid patient morbidity and mortality. Continuous waveform capnography remains the gold standard for endotracheal tube (ETT) confirmation, but it has limitations. Point-of-care ultrasound (POCUS) may be a useful alternative for confirming ETT placement. The objective of this study was to determine the accuracy of paramedic-performed POCUS identification of esophageal intubations with and without ETT manipulation. METHODS A prospective, observational study using a cadaver model was conducted. Local paramedics were recruited as subjects and each completed a survey of their demographics, employment history, intubation experience, and prior POCUS training. Subjects participated in a didactic session in which they learned POCUS identification of ETT location. During each study session, investigators randomly placed an ETT in either the trachea or esophagus of four cadavers, confirmed with direct laryngoscopy. Subjects then attempted to determine position using POCUS both without and with manipulation of the ETT. Manipulation of the tube was performed by twisting the tube. Descriptive statistics and logistic regression were used to assess the results and the effects of previous paramedic experience. RESULTS During 12 study sessions, from March 2014 through December 2015, 57 subjects participated, evaluating a total of 228 intubations: 113 tracheal and 115 esophageal. Subjects were 84.0% male, mean age of 39 years (range: 22 - 62 years), with median experience of seven years (range: 0.6 - 39 years). Paramedics correctly identified ETT location in 158 (69.3%) cases without and 194 (85.1%) with ETT manipulation. The sensitivity and specificity of identifying esophageal location without ETT manipulation increased from 52.2% (95% confidence interval [CI], 43.0-61.0) and 86.7% (95% CI, 81.0-93.0) to 87.0% (95% CI, 81.0-93.0) and 83.2% (95% CI, 0.76-0.90) after manipulation (P<.0001), without affecting specificity (P=.45). Subjects correctly identified 41 previously incorrectly identified esophageal intubations. Paramedic experience, previous intubations, and POCUS experience did not correlate with ability to identify tube location. CONCLUSION Paramedics can accurately identify esophageal intubations with POCUS, and manipulation improves identification. Further studies of paramedic use of dynamic POCUS to identify inadvertent esophageal intubations are needed. LemaPC, O'BrienM, WilsonJ, St. JamesE, LindstromH, DeAngelisJ, CaldwellJ, MayP, ClemencyB. Avoid the goose! Paramedic identification of esophageal intubation by ultrasound. Prehosp Disaster Med. 2018;33(4):406-410.
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Gottlieb M, Holladay D, Peksa GD. Ultrasonography for the Confirmation of Endotracheal Tube Intubation: A Systematic Review and Meta-Analysis. Ann Emerg Med 2018; 72:627-636. [DOI: 10.1016/j.annemergmed.2018.06.024] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2018] [Revised: 06/11/2018] [Accepted: 06/12/2018] [Indexed: 12/21/2022]
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Kabil AE, Ewis AM, Al-Ashkar AM, Abdelatif MAA, Nour MO. Real-time tracheal ultrasonography for confirming endotracheal tube placement. THE EGYPTIAN JOURNAL OF BRONCHOLOGY 2018. [DOI: 10.4103/ejb.ejb_88_17] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Zamani M, Esfahani MN, Joumaa I, Heydari F. Accuracy of Real-time Intratracheal Bedside Ultrasonography and Waveform Capnography for Confirmation of Intubation in Multiple Trauma Patients. Adv Biomed Res 2018; 7:95. [PMID: 30050883 PMCID: PMC6036770 DOI: 10.4103/abr.abr_179_17] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Background: A secure airway and effective ventilation are key components of advanced life support, and misplacement of endotracheal tube (ETT) can lead to morbidity in multiple trauma patients. The purpose of this study was to investigate the accuracy of ultrasound in diagnosis of direction for tracheal intubation. Materials and Methods: This descriptive-analytical study was conducted on 100 traumatic patients requiring intubation in 2016 in the Emergency Department of Al-Zahra and Kashani Medical Education Centers in Isfahan. Surface probe was placed transversally in the front of the neck at the top of the suprasternal notch, and the position of trachea was specified by front of comet-tail artifact which is the contour between hyperechoic air–mucosa (A–M) and a posterior reverberation artifact. Intubation accuracy by capnography was investigated, and the results were recorded in each patient's profile. Tracheal sonography was done during placement, or as soon as, the ETT has been embedded. The scanning time was minimized and it was carried out in total time of 10 s. Results: The diagnosis of intubation accuracy indicated that it was successful in 94 individuals (94%) and unsuccessful in 6 ones (6%). Intubation accuracy in 93 people (93%) was confirmed, and inaccuracy of intubation in 7 people (7%) was diagnosed. Ultrasound sensitivity in diagnosis of intubation accuracy was 97.9% (92.94) with 83.3% (5.6%) specificity. The positive and negative predictive values were 98.9% (92.93) and 71.4% (5.7%) respectively. Conclusion: Ultrasound method has high sensitivity and specificity to determine the correct placement of the tracheal tube, and it can be implemented as a reliable method given the acceptable positive and negative predictive values.
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Affiliation(s)
- Majid Zamani
- Department of Emergency Medicine, Emergency Medicine Research Center, Alzahra Hospital, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Mohammad Nasr Esfahani
- Department of Emergency Medicine, Emergency Medicine Research Center, Alzahra Hospital, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Ibrahim Joumaa
- Department of Emergency Medicine, Emergency Medicine Research Center, Alzahra Hospital, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Farhad Heydari
- Department of Emergency Medicine, Emergency Medicine Research Center, Alzahra Hospital, Isfahan University of Medical Sciences, Isfahan, Iran
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Ultrasonography in Emergency Department; a Diagnostic Tool for Better Examination and Decision-Making. ADVANCED JOURNAL OF EMERGENCY MEDICINE 2017; 2:e7. [PMID: 31172070 PMCID: PMC6548109 DOI: 10.22114/ajem.v0i0.40] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Context: The aim of this study is to evaluate the applications of ultrasonography (US) as a diagnostic tool in emergency settings. Evidence acquisition: In the present review article, search engines and scientific databases of Google Scholar, Science Direct, PubMed, Medline, Scopus, and Cochrane were searched for the applications of US in emergencies. Finally, related articles which were published between 2000 and 2017, were selected and by reviewing them an attempt was made to evaluate various applications of US for examining and facilitating decision-making in emergency department (ED). Results: As a diagnostic tool, US can be of diagnostic help in emergency settings for the specialists and the treatment team regarding trauma, measuring intracranial pressure (ICP), hemothorax pneumothorax, abscess and its drainage, deep vein thrombosis (DVT), dyspnea, acute abdomen, appendicitis and biliary problems, renal colic and renal stones, shock, foreign object, bone fracture, peripheral nerve block, establishing central and peripheral venous access, lumbar puncture (LP), and confirmation of nasogastric tube (NGT) and endotracheal tube (ETT) placement. Conclusion: The results of this review study showed that US can be of help to EMPs as a diagnostic tool in a wide range of diseases and clinical conditions, which in turn can result in a decrease in the time needed for diagnosis and treatment, and therefore improve both the quality and quantity of the service provided in ED.
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Lahham S, Baydoun J, Bailey J, Sandoval S, Wilson SP, Fox JC, Slattery DE. A Prospective Evaluation of Transverse Tracheal Sonography During Emergent Intubation by Emergency Medicine Resident Physicians. JOURNAL OF ULTRASOUND IN MEDICINE : OFFICIAL JOURNAL OF THE AMERICAN INSTITUTE OF ULTRASOUND IN MEDICINE 2017; 36:2079-2085. [PMID: 28503749 DOI: 10.1002/jum.14231] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2016] [Accepted: 01/13/2017] [Indexed: 06/07/2023]
Abstract
OBJECTIVES Establishing a definitive airway is often the first step in emergency department treatment of critically ill patients. Currently, there is no agreed upon consensus as to the most efficacious method of airway confirmation. Our objective was to determine the diagnostic accuracy of real-time sonography performed by resident physicians to confirm placement of the endotracheal tube during emergent intubation. METHODS We performed a prospective cohort study of adult patients in the emergency department undergoing emergent endotracheal intubation. Thirty emergency medicine residents, who were blinded to end-tidal carbon dioxide detection results, performed real-time transverse tracheal sonography during intubation to evaluate correct endotracheal tube placement. RESULTS Seventy-two patients were enrolled in the study. Sixty-eight instances (94.4%) were interpreted as correct placement in the trachea; 4 (5.6%) were interpreted as esophageal, of which 1 was a false-negative finding, therefore conferring sensitivity of 98.5% (95% confidence interval, 92.1%-99.9%) and specificity of 75.0% (95% confidence interval, 19.4%-99.4%) for correct placement. There was no significant difference in accuracy among resident sonographers with different levels of residency training. CONCLUSIONS A simple transverse tracheal sonographic examination performed by emergency medicine resident physicians can be used as an adjunct to help confirm correct endotracheal tube placement during intubation. In our cohort, the level of training did not appear to affect the ability of residents to correctly identify the endotracheal tube position.
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Affiliation(s)
- Shadi Lahham
- Department of Emergency Medicine, University of California, Irvine, Orange, California, USA
| | - Jamie Baydoun
- Department of Emergency Medicine, University of Nevada School of Medicine, Las Vegas, Nevada, USA
| | - James Bailey
- Department of Emergency Medicine, University of Nevada School of Medicine, Las Vegas, Nevada, USA
| | - Sandra Sandoval
- Department of Emergency Medicine, University of Nevada School of Medicine, Las Vegas, Nevada, USA
| | - Sean P Wilson
- Department of Emergency Medicine, University of California, Irvine, Orange, California, USA
| | - John C Fox
- Department of Emergency Medicine, University of California, Irvine, Orange, California, USA
| | - David E Slattery
- Department of Emergency Medicine, University of Nevada School of Medicine, Las Vegas, Nevada, USA
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Masoumi B, Azizkhani R, Emam GH, Asgarzadeh M, Kharazi BZ. Predictive Value of Tracheal Rapid Ultrasound Exam Performed in the Emergency Department for Verification of Tracheal Intubation. Open Access Maced J Med Sci 2017; 5:618-623. [PMID: 28932302 PMCID: PMC5591591 DOI: 10.3889/oamjms.2017.072] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2017] [Revised: 04/04/2017] [Accepted: 04/18/2017] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND Verification of the correct placement of the endotracheal tube (ETT) has been one of the most challenging issues of airway management in the field of emergency medicine. Early detection of oesophagal intubation through a reliable method is important for emergency physicians. AIM The aim of this study was to assess the diagnostic accuracy of tracheal rapid ultrasound exam (TRUE) to assess endotracheal tube misplacement during emergency intubation. METHODS This was an observational prospective study performed in the emergency department of the major tertiary referral hospital in the city. We included a consecutive selection of 100 patients. TRUE was performed for all these patients, and subsequently, quantitative waveform capnography was done. The later test is considered as the gold standard. RESULTS From our total 100 eligible patients, 93 (93%) participants had positive TRUE results (tracheal intubation) and 7 (7%) patients have negative TRUE results (esophageal intubation). Quantitative waveform capnography report of all 93 (100%) patients who had positive TRUE was positive (appropriate tracheal placement). Sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) of TRUE for detecting appropriate tracheal placement of ETT were 98.9% (95% CI, 93.3% to 99.8%), 100% (95% CI, 51.6% to 100%), 100% (95% CI, 95.1% to 100%) and 85.7% (95% CI, 42% to 99.2%) respectively. CONCLUSIONS Performing TRUE is convenient and feasible in many emergency departments and pre-hospital settings. We would recommend emergency units explore the possibility of using TRUE as a method in the assessment of proper ETT placement.
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Affiliation(s)
- Babak Masoumi
- Department of Emergency Medicine, Emergency Medicine Research Center, Al-Zahra Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Reza Azizkhani
- Department of Emergency Medicine, Emergency Medicine Research Center, Al-Zahra Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Gilava Hedayati Emam
- Department of Emergency Medicine, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Morteza Asgarzadeh
- Chief Research Fellow, Harvard University, T.H. Chan School of Public Health, Massachusetts, USA
| | - Behrouz Zargar Kharazi
- Department of Emergency Medicine, Emergency Medicine Research Center, Al-Zahra Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran
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Lonchena T, So S, Ibinson J, Roolf P, Orebaugh SL. Optimization of Ultrasound Transducer Positioning for Endotracheal Tube Placement Confirmation in Cadaveric Model. JOURNAL OF ULTRASOUND IN MEDICINE : OFFICIAL JOURNAL OF THE AMERICAN INSTITUTE OF ULTRASOUND IN MEDICINE 2017; 36:279-284. [PMID: 28072483 DOI: 10.7863/ultra.16.02010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Accepted: 05/10/2016] [Indexed: 06/06/2023]
Abstract
OBJECTIVES Sonography has been suggested as a possible means of endotracheal tube (ETT) placement confirmation. However, optimum ultrasound transducer placement has not been established. Using a cadaveric model, ETT placement by the sonographic appearance at the thyroid cartilage, cricoid cartilage, and suprasternal notch in the upper airway was assessed to determine which ultrasound transducer placement offered the most optimal images for ETT confirmation in the airway. METHODS One provider intubated 5 cadavers, with the ultrasound transducer at each of the 3 levels, for a total of 30 intubations per specimen, while 2 providers assigned a visual score of 1 (subtle), 2 (clear), or 3 (pronounced) to each sonogram of the ETT in the airway. RESULTS At the level of the thyroid cartilage, tracheal intubation was detected at a rate of 40%, with a median visualization scale of 1 (subtle movement). At the level of the cricoid cartilage, the visualization scale improved to a median of 2 (clear movement), with a 70% intubation detection rate. At the level of the suprasternal notch, 100% of the tracheal intubations were visualized on sonography, with a median score of 3 (pronounced movement). CONCLUSIONS In comparing sonographic detection of ETT placement at 3 levels of the upper airway in a cadaveric model, our results clearly indicate that visualization was superior at the level of the suprasternal notch, with 100% of intubations detected with the best visualization scores.
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Affiliation(s)
- Tiffany Lonchena
- Department of Anesthesiology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Sokpoleak So
- Department of Anesthesiology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - James Ibinson
- Department of Anesthesiology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Peter Roolf
- Center for Emergency Medicine, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA
| | - Steven L Orebaugh
- Department of Anesthesiology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
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Piette E, Daoust R, Lambert J, Denault A. Lung Sliding Identification Is Less Accurate in the Left Hemithorax. JOURNAL OF ULTRASOUND IN MEDICINE : OFFICIAL JOURNAL OF THE AMERICAN INSTITUTE OF ULTRASOUND IN MEDICINE 2017; 36:327-333. [PMID: 27943414 DOI: 10.7863/ultra.15.06092] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Accepted: 04/28/2016] [Indexed: 06/06/2023]
Abstract
OBJECTIVES The aim of our study was to compare the accuracy of lung sliding identification for the left and right hemithoraxes, using prerecorded short US sequences, in a group of physicians with mixed clinical and US training. METHODS A total of 140 US sequences of a complete respiratory cycle were recorded in the operating room. Each sequence was divided in two, yielding 140 sequences of present lung sliding and 140 sequences of absent lung sliding. Of these 280 sequences, 40 were randomly repeated to assess intraobserver variability, for a total of 320 sequences. Descriptive data, the mean accuracy of each participant, as well as the rate of correct answers for each of the original 280 sequences were tabulated and compared for different subgroups of clinical and US training. A video with examples of present and absent lung sliding and a lung pulse was shown before testing. RESULTS Two sessions were planned to facilitate the participation of 75 clinicians. In the first group, the rate of accurate lung sliding identification was lower in the left hemithorax than in the right (67.0% [interquartile range (IQR), 43.0-83.0] versus 80.0% [IQR, 57.0-95.0]; P < .001). In the second group, the rate of accurate lung sliding identification was also lower in the left hemithorax than in the right (76.3% [IQR, 42.9-90.9] versus 88.7% [IQR, 63.1-96.9]; P = .001). Mean accuracy rates were 67.5% (95% confidence interval, 65.7-69.4) in the first group and 73.1% (95% confidence interval, 70.7-75.5) in the second (P < .001). CONCLUSIONS Lung sliding identification seems less accurate in the left hemithorax when using a short US examination. This study was done on recorded US sequences and should be repeated in a live clinical situation to confirm our results.
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Affiliation(s)
- Eric Piette
- Department of Emergency Medicine, Hôpital du Sacré-Coeur de Montréal, Université de Montréal, Montréal, Québec, Canada
| | - Raoul Daoust
- Departments of Family and Emergency Medicine, Université de Montréal, Montréal, Québec, Canada
| | - Jean Lambert
- Preventive and Social Medicine, Université de Montréal, Montréal, Québec, Canada
| | - André Denault
- Department of Anesthesiology, Montréal Heart Institute, Université de Montréal, Montréal, Québec, Canada
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Thomas VK, Paul C, Rajeev PC, Palatty BU. Reliability of Ultrasonography in Confirming Endotracheal Tube Placement in an Emergency Setting. Indian J Crit Care Med 2017; 21:257-261. [PMID: 28584427 PMCID: PMC5455017 DOI: 10.4103/ijccm.ijccm_417_16] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Background and Objectives: Over the past few years, ultrasonography is increasingly being used to confirm the correct placement of endotracheal tube (ETT). In our study, we aimed to compare it with the traditional clinical methods and the gold standard quantitative waveform capnography. Two primary outcomes were measured in our study. First was the sensitivity and specificity of ultrasonography against the other two methods to confirm endotracheal intubation. The second primary outcome assessed was the time taken for each method to confirm tube placement in an emergency setting. Methods: This is a single-centered, prospective cohort study conducted in an emergency department of a tertiary care hospital. We included 100 patients with indication of emergency intubation by convenient sampling. The intubation was performed as per standard hospital protocol. As part of the study protocol, ultrasonography was used to identify ETT placement simultaneously with the intubation procedure along with quantitative waveform capnography (end-tidal carbon dioxide) and clinical methods. Confirmation of tube placement and time taken for the same were noted by three separate health-care staffs. Results and Discussion: Out of the 100 intubation attempts, five (5%) had esophageal intubations. The sensitivity and specificity of diagnosis using ultrasonography were 97.89% and 100%, respectively. This was statistically comparable with the other two modalities. The time taken to confirm tube placement with ultrasonography was 8.27 ± 1.54 s compared to waveform capnography and clinical methods which were 18.06 ± 2.58 and 20.72 ± 3.21 s, respectively. The time taken by ultrasonography was significantly less. Conclusions: Ultrasonography confirmed tube placement with comparable sensitivity and specificity to quantitative waveform capnography and clinical methods. But then, it yielded results considerably faster than the other two modalities.
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Affiliation(s)
- Vimal Koshy Thomas
- Department of Emergency Medicine, Jubilee Mission Medical College and Research Institute, Thrissur, Kerala, India
| | - Cherish Paul
- Department of Anesthesia and Critical Care, Jubilee Mission Medical College and Research Institute, Thrissur, Kerala, India
| | - Punchalil Chathappan Rajeev
- Department of Emergency Medicine, Jubilee Mission Medical College and Research Institute, Thrissur, Kerala, India
| | - Babu Urumese Palatty
- Department of Emergency Medicine, Jubilee Mission Medical College and Research Institute, Thrissur, Kerala, India
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Two methods for teaching basic upper airway sonography. J Clin Anesth 2016; 31:166-72. [DOI: 10.1016/j.jclinane.2016.01.040] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2013] [Revised: 01/22/2016] [Accepted: 01/26/2016] [Indexed: 01/29/2023]
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Karacabey S, Sanrı E, Gencer EG, Guneysel O. Tracheal ultrasonography and ultrasonographic lung sliding for confirming endotracheal tube placement: Speed and Reliability. Am J Emerg Med 2016; 34:953-6. [DOI: 10.1016/j.ajem.2016.01.027] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Revised: 01/20/2016] [Accepted: 01/20/2016] [Indexed: 01/24/2023] Open
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Chenkin J, McCartney CJL, Jelic T, Romano M, Heslop C, Bandiera G. Defining the learning curve of point-of-care ultrasound for confirming endotracheal tube placement by emergency physicians. Crit Ultrasound J 2015; 7:14. [PMID: 26383011 PMCID: PMC4573959 DOI: 10.1186/s13089-015-0031-7] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Accepted: 08/26/2015] [Indexed: 11/10/2022] Open
Abstract
Background Unrecognized esophageal intubations are associated with significant patient morbidity and mortality. No single confirmatory device has been shown to be 100 % accurate at ruling out esophageal intubations in the emergency department. Recent studies have demonstrated that point-of-care ultrasound (POCUS) may be a useful adjunct for confirming endotracheal tube placement; however, the amount of practice required to become proficient at this technique is unclear. The purpose of this study is to determine the amount of practice required by emergency physicians to become proficient at interpreting ultrasound video clips of esophageal and endotracheal intubations. Methods Emergency physicians and emergency medicine residents completed a baseline interpretation test followed by a 10 min online tutorial. They then interpreted POCUS clips of esophageal and endotracheal intubations in a randomly selected order. If an incorrect response was provided, the participant completed another practice session with feedback. This process continued until they correctly interpreted ten consecutive ultrasound clips. Descriptive statistics were used to summarize the data. Results Of the 87 eligible physicians, 66 (75.9 %) completed the study. The mean score on the baseline test was 42.9 % (SD 32.7 %). After the tutorial, 90.9 % (60/66) of the participants achieved proficiency after one practice attempt and 100 % achieved proficiency after two practice attempts. Six intubation ultrasound clips were misinterpreted, for a total error rate of 0.9 % (6/684). Overall, the participants had a sensitivity of 98.3 % (95 % CI 96.3–99.4 %) and specificity of 100 % (95 % CI 98.9–100 %) for detecting correct tube location. Scans were interpreted within an average of 4 s (SD 2.9 s) of the intubation. Conclusions After a brief online tutorial and only two practice attempts, emergency physicians were able to quickly and accurately interpret ultrasound intubation clips of esophageal and endotracheal intubations. Electronic supplementary material The online version of this article (doi:10.1186/s13089-015-0031-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Jordan Chenkin
- Department of Emergency Medicine, Sunnybrook Health Sciences Centre, 2075 Bayview Avenue, Toronto, ON, M4N 3M5, Canada. .,Division of Emergency Medicine, University of Toronto, 2075 Bayview Avenue C753, Toronto, ON, M4N 3M5, Canada.
| | - Colin J L McCartney
- Department of Anesthesiology, University of Ottawa, Room B311, 1053 Carling Avenue, Mail Stop 249, Ottawa, ON, K1Y 4E9, Canada.
| | - Tomislav Jelic
- Department of Emergency Medicine, Sunnybrook Health Sciences Centre, 2075 Bayview Avenue, Toronto, ON, M4N 3M5, Canada.
| | - Michael Romano
- Division of Emergency Medicine, University of Toronto, 2075 Bayview Avenue C753, Toronto, ON, M4N 3M5, Canada.
| | - Claire Heslop
- Division of Emergency Medicine, University of Toronto, 2075 Bayview Avenue C753, Toronto, ON, M4N 3M5, Canada.
| | - Glen Bandiera
- Division of Emergency Medicine, University of Toronto, 2075 Bayview Avenue C753, Toronto, ON, M4N 3M5, Canada. .,Department of Emergency Medicine, St. Michael's Hospital, 30 Bond Street, Toronto, ON, M5B 1W8, Canada.
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Tessaro MO, Salant EP, Arroyo AC, Haines LE, Dickman E. Tracheal rapid ultrasound saline test (T.R.U.S.T.) for confirming correct endotracheal tube depth in children. Resuscitation 2015; 89:8-12. [DOI: 10.1016/j.resuscitation.2014.08.033] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2014] [Revised: 08/08/2014] [Accepted: 08/24/2014] [Indexed: 10/24/2022]
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Chou EH, Dickman E, Tsou PY, Tessaro M, Tsai YM, Ma MHM, Lee CC, Marshall J. Ultrasonography for confirmation of endotracheal tube placement: a systematic review and meta-analysis. Resuscitation 2015; 90:97-103. [PMID: 25711517 DOI: 10.1016/j.resuscitation.2015.02.013] [Citation(s) in RCA: 91] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Revised: 02/11/2015] [Accepted: 02/12/2015] [Indexed: 01/08/2023]
Abstract
OBJECTIVE This study aimed to undertake a systematic review and meta-analysis to summarize evidence on the diagnostic value of ultrasonography for the assessment of endotracheal tube placement in adult patients. METHODS The major databases, PubMed, EMBASE, and the Cochrane Library, were searched for studies published from inception to June 2014. We selected studies that used ultrasonography to confirm endotracheal tube placement. The search was limited to human studies, and had no publication date or country restrictions. Exclusion criteria included case reports, comments, reviews, guidelines and animal studies. Two reviewers extracted and verified the data independently. We summarized test performance characteristics with the use of forest plots, hierarchical summary receiver operating characteristic (HSROC) curves, and bivariate random effect models. Meta-regression analysis was performed to explore the source of heterogeneity. The methodological quality of individual studies was evaluated using the Quality Assessment of Diagnostic Accuracy Studies (QUADAS) tool. RESULTS A total of 12 eligible studies involving adult patients and cadaveric models were identified from 1488 references. For detection of esophageal intubation, the pooled sensitivity was 0.93 (95% CI: 0.86-0.96) and the specificity was 0.97 (95% CI: 0.95-0.98). The area under the summary ROC curve was 0.97 (95% CI: 0.95-0.98). The positive and negative likelihood ratios were 26.98 (95% CI: 19.32-37.66) and 0.08 (95% CI: 0.04-0.15), respectively. CONCLUSIONS Current evidence supports that ultrasonography has high diagnostic value for identifying esophageal intubation. With optimal sensitivity and specificity, ultrasonography can be a valuable adjunct in this aspect of airway assessment, especially in situations where capnography may be unreliable.
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Affiliation(s)
- Eric H Chou
- Department of Emergency Medicine, Maimonides Medical Center, Brooklyn, NY, USA.
| | - Eitan Dickman
- Department of Emergency Medicine, Maimonides Medical Center, Brooklyn, NY, USA
| | - Po-Yang Tsou
- College of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Mark Tessaro
- Department of Emergency Medicine, Maimonides Medical Center, Brooklyn, NY, USA
| | - Yang-Ming Tsai
- Department of Emergency Medicine, National Taiwan University Hospital Yunlin Branch, Douliou, Taiwan
| | - Matthew Huei-Ming Ma
- Department of Emergency Medicine, National Taiwan University Hospital, Taipei, Taiwan
| | - Chien-Chang Lee
- Department of Emergency Medicine, National Taiwan University Hospital Yunlin Branch, Douliou, Taiwan; Department of Emergency Medicine, National Taiwan University Hospital, Taipei, Taiwan.
| | - John Marshall
- Department of Emergency Medicine, Maimonides Medical Center, Brooklyn, NY, USA
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Point of care ultrasound for orotracheal tube placement assessment in out-of hospital setting. Resuscitation 2015; 87:1-6. [DOI: 10.1016/j.resuscitation.2014.11.006] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Revised: 11/05/2014] [Accepted: 11/06/2014] [Indexed: 11/20/2022]
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Das SK, Choupoo NS, Haldar R, Lahkar A. Transtracheal ultrasound for verification of endotracheal tube placement: a systematic review and meta-analysis. Can J Anaesth 2014; 62:413-23. [PMID: 25537734 DOI: 10.1007/s12630-014-0301-z] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Accepted: 12/09/2014] [Indexed: 02/03/2023] Open
Abstract
PURPOSE Early confirmation of endotracheal tube placement is of paramount importance to prevent hypoxia and its catastrophic consequences. Despite certain limitations, capnography is considered the gold standard to evaluate the proper placement of an endotracheal tube. Ultrasound is a novel tool with some definitive advantages over capnography. It enables a real-time view and can be performed quickly; furthermore, it is independent of pulmonary blood flow and does not require lung ventilation. In this review, we aimed to evaluate the diagnostic accuracy of transtracheal ultrasound in detecting endotracheal intubation. SOURCE We completed an extensive search of MEDLINE®, EMBASE™, The Cochrane Library, KoreaMed, LILACS, OpenGrey, and the World Health Organization International Clinical Trials Registry from their inception to September 4, 2014. The studies that met the inclusion criteria were pooled and a meta-analysis was conducted. PRINCIPAL FINDINGS Eleven studies and 969 intubations were included in the final analysis. Eight studies and 713 intubations were performed in emergency situations and the others were carried out in elective situations. Transtracheal ultrasonography's pooled sensitivity and specificity with 95% confidence intervals (CIs) were 0.98 (95% CI 0.97 to 0.99) and 0.98 (95% CI 0.95 to 0.99), respectively. In emergency scenarios, transtracheal ultrasonography showed an aggregate sensitivity and specificity of 0.98 (95% CI 0.97 to 0.99) and 0.94 (95% CI 0.86 to 0.98), respectively. CONCLUSION Transtracheal ultrasound is a useful tool to confirm endotracheal intubation with an acceptable degree of sensitivity and specificity. It can be used in emergency situations as a preliminary test before final confirmation by capnography.
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Affiliation(s)
- Saurabh Kumar Das
- Department of Anesthesia and Critical Care, Nazareth Hospital, Shillong, 793003, Meghalaya, India,
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Gottlieb M, Bailitz JM, Christian E, Russell FM, Ehrman RR, Khishfe B, Kogan A, Ross C. Accuracy of a novel ultrasound technique for confirmation of endotracheal intubation by expert and novice emergency physicians. West J Emerg Med 2014; 15:834-9. [PMID: 25493129 PMCID: PMC4251230 DOI: 10.5811/westjem.22550.9.22550] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2014] [Revised: 08/07/2014] [Accepted: 09/08/2014] [Indexed: 11/11/2022] Open
Abstract
Introduction Recent research has investigated the use of ultrasound (US) for confirming endotracheal tube (ETT) placement with varying techniques, accuracies, and challenges. Our objective was to evaluate the accuracy of a novel, simplified, four-step (4S) technique. Methods We conducted a blinded, randomized trial of the 4S technique utilizing an adult human cadaver model. ETT placement was randomized to tracheal or esophageal location. Three US experts and 45 emergency medicine residents (EMR) performed a total of 150 scans. The primary outcome was the overall sensitivity and specificity of both experts and EMRs to detect location of ETT placement. Secondary outcomes included a priori subgroup comparison of experts and EMRs for thin and obese cadavers, time to detection, and level of operator confidence. Results Experts had a sensitivity of 100% (95% CI = 72% to 100%) and specificity of 100% (95% CI = 77% to 100%) on thin, and a sensitivity of 93% (95% CI = 66% to 100%) and specificity of 100% (95% CI = 75% to 100%) on obese cadavers. EMRs had a sensitivity of 91% (95% CI = 69% to 98%) and of specificity 96% (95% CI = 76% to 100%) on thin, and a sensitivity of 100% (95% CI = 82% to 100%) specificity of 48% (95% CI = 27% to 69%) on obese cadavers. The overall mean time to detection was 17 seconds (95% CI = 13 seconds to 20 seconds, range: 2 to 63 seconds) for US experts and 29 seconds (95% CI = 25 seconds to 33 seconds; range: 6 to 120 seconds) for EMRs. There was a statistically significant decrease in the specificity of this technique on obese cadavers when comparing the EMRs and experts, as well as an increased overall time to detection among the EMRs. Conclusion The simplified 4S technique was accurate and rapid for US experts. Among novices, the 4S technique was accurate in thin, but appears less accurate in obese cadavers. Further studies will determine optimal teaching time and accuracy in emergency department patients.
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Alonso Quintela P, Oulego Erroz I, Mora Matilla M, Rodríguez Blanco S, Mata Zubillaga D, Regueras Santos L. Usefulness of bedside ultrasound compared to capnography and X-ray for tracheal intubation. ANALES DE PEDIATRÍA (ENGLISH EDITION) 2014. [DOI: 10.1016/j.anpede.2014.01.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Budhram G, Murman D, Lutfy L, Sullivan A. Sonographic confirmation of intubation: comparison of 3 methods in a pig model. JOURNAL OF ULTRASOUND IN MEDICINE : OFFICIAL JOURNAL OF THE AMERICAN INSTITUTE OF ULTRASOUND IN MEDICINE 2014; 33:1925-1929. [PMID: 25336479 DOI: 10.7863/ultra.33.11.1925] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
OBJECTIVES Several recent studies have investigated methods to confirm endotracheal tube (ETT) placement with sonography, using diaphragmatic movement, lung sliding, and transtracheal visualization of the ETT. To our knowledge, no studies have directly compared these 3 methods. This study aimed to directly compare the test characteristics of these 3 methods to determine ETT placement. Additionally, we compared the time required to complete the sonographic examination and the performers' confidence in their findings. METHODS We conducted a prospective randomized single-blinded study. Twenty-five recently euthanized pigs were intubated either in the esophagus or trachea, for a total of 50 intubations. Each of the 3 sonographic methods of intubation confirmation was performed by sonographers of different skill levels. Sonographic findings, the time to findings, and confidence in findings were recorded. RESULTS A total of 150 sonographic examinations were performed. There were no significant differences in the sensitivity, specificity, positive predictive value, negative predictive value, or accuracy for correct ETT placement between the 3 methods of intubation confirmation. On average, the transtracheal and thoracic methods were faster (12.5 and 14.0 seconds, respectively) than the diaphragmatic method (21.0 seconds; P < .01). There were no significant differences in operator confidence between the confirmation methods. CONCLUSIONS All 3 methods for determining ETT placement had similar test characteristics. Transtracheal and thoracic sonography were faster than diaphragmatic sonography for determining ETT placement in pigs.
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Affiliation(s)
- Gavin Budhram
- Department of Emergency Medicine, Tufts University School of Medicine, Baystate Medical Center, Springfield, Massachusetts USA (G.B., L.L.); and Department of Emergency Medicine, University of Vermont, Burlington, Vermont USA (D.M., A.S.).
| | - David Murman
- Department of Emergency Medicine, Tufts University School of Medicine, Baystate Medical Center, Springfield, Massachusetts USA (G.B., L.L.); and Department of Emergency Medicine, University of Vermont, Burlington, Vermont USA (D.M., A.S.)
| | - Lucienne Lutfy
- Department of Emergency Medicine, Tufts University School of Medicine, Baystate Medical Center, Springfield, Massachusetts USA (G.B., L.L.); and Department of Emergency Medicine, University of Vermont, Burlington, Vermont USA (D.M., A.S.)
| | - Alison Sullivan
- Department of Emergency Medicine, Tufts University School of Medicine, Baystate Medical Center, Springfield, Massachusetts USA (G.B., L.L.); and Department of Emergency Medicine, University of Vermont, Burlington, Vermont USA (D.M., A.S.)
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Sun JT, Chou HC, Sim SS, Chong KM, Ma MHM, Wang HP, Lien WC. Ultrasonography for Proper Endotracheal Tube Placement Confirmation in Out-of-hospital Cardiac Arrest Patients: Two-center Experience. J Med Ultrasound 2014. [DOI: 10.1016/j.jmu.2014.05.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Kristensen MS, Teoh WH, Graumann O, Laursen CB. Ultrasonography for clinical decision-making and intervention in airway management: from the mouth to the lungs and pleurae. Insights Imaging 2014; 5:253-79. [PMID: 24519789 PMCID: PMC3999368 DOI: 10.1007/s13244-014-0309-5] [Citation(s) in RCA: 116] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2013] [Revised: 12/20/2013] [Accepted: 01/10/2014] [Indexed: 01/01/2023] Open
Abstract
OBJECTIVES To create a state-of-the-art overview of the new and expanding role of ultrasonography in clinical decision-making, intervention and management of the upper and lower airways, that is clinically relevant, up-to-date and practically useful for clinicians. METHODS This is a narrative review combined with a structured Medline literature search. RESULTS Ultrasonography can be utilised to predict airway difficulty during induction of anaesthesia, evaluate if the stomach is empty or possesses gastric content that poses an aspiration risk, localise the essential cricothyroid membrane prior to difficult airway management, perform nerve blocks for awake intubation, confirm tracheal or oesophageal intubation and facilitate localisation of tracheal rings for tracheostomy. Ultrasonography is an excellent diagnostic tool in intraoperative and emergency diagnosis of pneumothorax. It also enables diagnosis and treatment of interstitial syndrome, lung consolidation, atelectasis, pleural effusion and differentiates causes of acute breathlessness during pregnancy. Patient safety can be enhanced by performing procedures under ultrasound guidance, e.g. thoracocentesis, vascular line access and help guide timing of removal of chest tubes by quantification of residual pneumothorax size. CONCLUSIONS Ultrasonography used in conjunction with hands-on management of the upper and lower airways has multiple advantages. There is a rapidly growing body of evidence showing its benefits. TEACHING POINTS • Ultrasonography is becoming essential in management of the upper and lower airways. • The tracheal structures can be identified by ultrasonography, even when unidentifiable by palpation. • Ultrasonography is the primary diagnostic approach in suspicion of intraoperative pneumothorax. • Point-of-care ultrasonography of the airways has a steep learning curve. • Lung ultrasonography allows treatment of interstitial syndrome, consolidation, atelectasis and effusion.
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Affiliation(s)
- Michael S Kristensen
- Department of Anaesthesia, Rigshospitalet, University Hospital of Copenhagen, Blegdamsvej 9, 2100, Denmark,
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Alonso Quintela P, Oulego Erroz I, Mora Matilla M, Rodríguez Blanco S, Mata Zubillaga D, Regueras Santos L. [Usefulness of bedside ultrasound compared to capnography and X-ray for tracheal intubation]. An Pediatr (Barc) 2014; 81:283-8. [PMID: 24560730 DOI: 10.1016/j.anpedi.2014.01.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Revised: 01/07/2014] [Accepted: 01/10/2014] [Indexed: 12/31/2022] Open
Abstract
OBJECTIVES The aim of this study was to assess the usefulness of bedside ultrasound compared to capnography and X-ray for endotracheal intubation in children and newborns. MATERIALS AND METHODS Hemodynamically stable children intubated in pedriatric and neonatal intensive care unit were included. Endotracheal tube insertion was checked after every intubation attempt by tracheal ultrasound and capnography simultaneously. The endotracheal tube insertion depth was then checked by assesment of lung sliding by thoracic ultrasound. Thereafter, Chest X-ray was performed and interpreted as usual. Time to perform each technique was recorded. RESULTS The study included 31 intubations in 26 patients (15 in PICU and 16 in NICU). There were no statistically significant differences between tracheal ultrasound and capnography or between thoracic ultrasound and x-ray in identifying the correct endotracheal intubation and assessment of endotracheal tube insertion depth, respectively. Sensibility and specificity of ultrasound compared to capnography was 92% and 100%, and 100% and 75% compared to X-ray. Ultrasound was significantly slower compared to capnography [12 (4-16) vs 6 (3-12) seconds; P<.001] and significantly quicker compared to X-ray [0.22 (0.17-0.40) vs. 20 (17-25) minutes, P<.001]. CONCLUSIONS Ultrasound appears to be as effective as capnography, although slower, for identifying endotracheal intubation. Ultrasound may be useful in clinical situations, such as cardiopulmonary resuscitation where capnography is less reliable. Ultrasound is as effective and quicker than X-ray for assessment of endotracheal tube insertion depth, and it may contribute to decrease the routine use of X-ray after tracheal intubation.
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Affiliation(s)
- P Alonso Quintela
- Servicio Pediatría, Complejo Asistencial Universitario de León, León, España.
| | - I Oulego Erroz
- Servicio de Cardiología, Complejo Asistencial Universitario de León, León, España; Unidad de Cuidados Intensivos Pediátricos, Complejo Asistencial Universitario de León, León, España
| | - M Mora Matilla
- Servicio Pediatría, Complejo Asistencial Universitario de León, León, España
| | - S Rodríguez Blanco
- Servicio de Neonatología, Complejo Asistencial Universitario de León, León, España; Unidad de Cuidados Intensivos Pediátricos, Complejo Asistencial Universitario de León, León, España
| | - D Mata Zubillaga
- Centro de Salud Ponferrada IV, Complejo Asistencial Universitario de León, León, España
| | - L Regueras Santos
- Unidad de Cuidados Intensivos Pediátricos, Complejo Asistencial Universitario de León, León, España
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Stuntz R, Kochert E, Kehrl T, Schrading W. The effect of sonologist experience on the ability to determine endotracheal tube location using transtracheal ultrasound. Am J Emerg Med 2013; 32:267-9. [PMID: 24360314 DOI: 10.1016/j.ajem.2013.11.032] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Revised: 11/06/2013] [Accepted: 11/16/2013] [Indexed: 11/27/2022] Open
Abstract
STUDY OBJECTIVE Transtracheal ultrasound has been described as a method to evaluate endotracheal tube placement. Correlation between sonologist experience and the successful use of transtracheal ultrasound to identify endotracheal tube location has not been examined. Our objectives were to evaluate emergency physicians' ability to correctly identify endotracheal tube location using transtracheal ultrasound and to evaluate the role operator experience plays in successful identification of tube placement. METHODS This was a cross-sectional, single-blinded study conducted in a cadaver laboratory. Two cadavers were used as models. One cadaver had an endotracheal tube placed in the esophagus, and the second had the tube placed in the trachea. Participants were asked to evaluate tube placement using transtracheal ultrasound and to record their interpretation. Examination clips were reviewed by the emergency ultrasound fellowship director. Descriptive statistics and χ(2) test were used for analysis. RESULTS Twenty-nine participants were included, 8 (27.6%) of whom were considered to be "most experienced" based on previous ultrasound experience (>150 scans). Eleven of 29 correctly identified esophageal intubation and 18 of 29 correctly identified tracheal intubation, resulting in a sensitivity of 62.0% (95% confidence interval [CI], 42.3-79.3) and a specificity of 37.9% (95% CI, 20.7-57.7). Transtracheal ultrasound performed by the most experienced sonologists showed better sensitivity and specificity, 75.0% (95% CI, 34.9-96.8) and 62.5% (95% CI, 24.5-91.5), respectively. CONCLUSION Most participants obtained adequate images, but correct interpretation of the images was poor. The most experienced sonologists correctly identified tube location more often. Additional education would be required before adopting this method.
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Affiliation(s)
- Robert Stuntz
- Department of Emergency Medicine, Wellspan York Hospital, York, PA, USA.
| | - Erik Kochert
- Department of Emergency Medicine, Wellspan York Hospital, York, PA, USA
| | - Thompson Kehrl
- Department of Emergency Medicine, Wellspan York Hospital, York, PA, USA
| | - Walter Schrading
- Department of Emergency Medicine, Wellspan York Hospital, York, PA, USA
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Hosseini JS, Talebian MT, Ghafari MH, Eslami V. Secondary confirmation of endotracheal tube position by diaphragm motion in right subcostal ultrasound view. Int J Crit Illn Inj Sci 2013; 3:113-7. [PMID: 23961455 PMCID: PMC3743335 DOI: 10.4103/2229-5151.114269] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
Aims: To assess the sensitivity and specificity of right subcostal ultrasound view to confirm correct endotracheal tube intubation (ETT). Materials and Methods: In this prospective study, apneic or paralyzed patients who had an indication of intubation were selected. Intubation and ventilation with bag were performed by the skilled third-year emergency medicine residents. The residents, following a brief training course of ultrasonography, interpreted the diaphragm motion, and identified either esophageal or tracheal intubation. The confirmation of ETT placement was done by the sonographer. Sensitivity, specificity, positive predictive value, negative predictive value, and accuracy were calculated for tracheal versus esophageal intubation. Results: A total of 57 patients aged 59 ± 5 who underwent ETT insertion were studied. Thirty-four of them were male (60%). Ultrasound correctly identified 11 out of 12 esophageal intubations for a sensitivity of 92% (95% CI = 62-100), but misidentified one esophageal intubation as tracheal. Sonographers correctly identified 43 out of 45 (96%) tracheal intubations for a specificity of 96% (95% CI = 85-99), but misdiagnosed two tracheal intubations as esophageal. Conclusions: This study suggests that diaphragm motion in right subcostal ultrasound view is an effective adjunct to diagnose ETT place in patients undergoing intubation in emergency department.
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Affiliation(s)
- Javad Seyed Hosseini
- Department of Emergency Medicine, Tehran University of Medical Sciences, Tehran, Iran
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Chou HC, Chong KM, Sim SS, Ma MHM, Liu SH, Chen NC, Wu MC, Fu CM, Wang CH, Lee CC, Lien WC, Chen SC. Real-time tracheal ultrasonography for confirmation of endotracheal tube placement during cardiopulmonary resuscitation. Resuscitation 2013; 84:1708-12. [PMID: 23851048 DOI: 10.1016/j.resuscitation.2013.06.018] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2013] [Revised: 06/02/2013] [Accepted: 06/18/2013] [Indexed: 11/24/2022]
Abstract
OBJECTIVE This study aimed to evaluate the accuracy of tracheal ultrasonography for assessing endotracheal tube position during cardiopulmonary resuscitation (CPR). METHODS We performed a prospective observational study of patients undergoing emergency intubation during CPR. Real-time tracheal ultrasonography was performed during the intubation with the transducer placed transversely just above the suprasternal notch, to assess for endotracheal tube positioning and exclude esophageal intubation. The position of trachea was identified by a hyperechoic air-mucosa (A-M) interface with posterior reverberation artifact (comet-tail artifact). The endotracheal tube position was defined as endotracheal if single A-M interface with comet-tail artifact was observed. Endotracheal tube position was defined as intraesophageal if a second A-M interface appeared, suggesting a false second airway (double tract sign). The gold standard of correct endotracheal intubation was the combination of clinical auscultation and quantitative waveform capnography. The main outcome was the accuracy of tracheal ultrasonography in assessing endotracheal tube position during CPR. RESULTS Among the 89 patients enrolled, 7 (7.8%) had esophageal intubations. The sensitivity, specificity, positive predictive value, and negative predictive value of tracheal ultrasonography were 100% (95% confidence interval [CI]: 94.4-100%), 85.7% (95% CI: 42.0-99.2%), 98.8% (95% CI: 92.5-99.0%) and 100% (95% CI: 54.7-100%), respectively. Positive and negative likelihood ratios were 7.0 (95% CI: 1.1-43.0) and 0.0, respectively. CONCLUSIONS Real-time tracheal ultrasonography is an accurate method for identifying endotracheal tube position during CPR without the need for interruption of chest compression. Tracheal ultrasonography in resuscitation management may serve as a powerful adjunct in trained hands.
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Affiliation(s)
- Hao-Chang Chou
- Department of Emergency Medicine, National Taiwan University Hospital, Taipei City, Taiwan.
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Adi O, Chuan TW, Rishya M. A feasibility study on bedside upper airway ultrasonography compared to waveform capnography for verifying endotracheal tube location after intubation. Crit Ultrasound J 2013; 5:7. [PMID: 23826756 PMCID: PMC3772703 DOI: 10.1186/2036-7902-5-7] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2013] [Accepted: 06/12/2013] [Indexed: 12/20/2022] Open
Abstract
Background In emergency settings, verification of endotracheal tube (ETT) location is important for critically ill patients. Ignorance of oesophageal intubation can be disastrous. Many methods are used for verification of the endotracheal tube location; none are ideal. Quantitative waveform capnography is considered the standard of care for this purpose but is not always available and is expensive. Therefore, this feasibility study is conducted to compare a cheaper alternative, bedside upper airway ultrasonography to waveform capnography, for verification of endotracheal tube location after intubation. Methods This was a prospective, single-centre, observational study, conducted at the HRPB, Ipoh. It included patients who were intubated in the emergency department from 28 March 2012 to 17 August 2012. A waiver of consent had been obtained from the Medical Research Ethics Committee. Bedside upper airway ultrasonography was performed after intubation and compared to waveform capnography. Specificity, sensitivity, positive and negative predictive value and likelihood ratio are calculated. Results A sample of 107 patients were analysed, and 6 (5.6%) had oesophageal intubations. The overall accuracy of bedside upper airway ultrasonography was 98.1% (95% confidence interval (CI) 93.0% to 100.0%). The kappa value (Κ) was 0.85, indicating a very good agreement between the bedside upper airway ultrasonography and waveform capnography. Thus, bedside upper airway ultrasonography is in concordance with waveform capnography. The sensitivity, specificity, positive predictive value and negative predictive value of bedside upper airway ultrasonography were 98.0% (95% CI 93.0% to 99.8%), 100% (95% CI 54.1% to 100.0%), 100% (95% CI 96.3% to 100.0%) and 75.0% (95% CI 34.9% to 96.8%). The likelihood ratio of a positive test is infinite and the likelihood ratio of a negative test is 0.0198 (95% CI 0.005 to 0.0781). The mean confirmation time by ultrasound is 16.4 s. No adverse effects were recorded. Conclusions Our study shows that ultrasonography can replace waveform capnography in confirming ETT placement in centres without capnography. This can reduce incidence of unrecognised oesophageal intubation and prevent morbidity and mortality. Trial registration National Medical Research Register NMRR11100810230.
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Affiliation(s)
- Osman Adi
- Department of Trauma and Emergency Medicine, Raja Permaisuri Bainun Hospital, Ipoh, Perak 30990, Malaysia.
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Abstract
PURPOSE OF REVIEW Recent advances were made in the field of point-of-care ultrasound (POCUS). Thoracic and lung ultrasound have become a rapid and accurate method of diagnosis of hypoxic diseases. The purpose of this article is to review the recent literature on POCUS, emphasizing on its use in the operating room. RECENT FINDINGS Many international critical care societies published guidelines on the use of ultrasound in the installation of central venous access. More recently, evidenced-based guidelines on the use of POC lung ultrasound were published. Lung ultrasound has shown its superiority over conventional chest radiography in the diagnosis of many disorders of significant importance in anesthesiology, particularly the pneumothorax. SUMMARY POC thoracic and lung ultrasound is used in many critical medicine fields. The aim of this review is to describe the basic lung ultrasound technique and the knowledge required in order to diagnose and treat the hypoxic patient. Emphasis is on disorder such as pleural effusion, alveolar interstitial disease, as well as pneumothorax, which is of particular importance in the field of anesthesiology.
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Is ultrasound a feasible tool to verify endotracheal tube position in neonates? Resuscitation 2012; 84:e19-20. [PMID: 23059560 DOI: 10.1016/j.resuscitation.2012.09.026] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2012] [Accepted: 09/23/2012] [Indexed: 11/21/2022]
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PFEIFFER P, BACHE S, ISBYE DL, RUDOLPH SS, ROVSING L, BØRGLUM J. Verification of endotracheal intubation in obese patients - temporal comparison of ultrasound vs. auscultation and capnography. Acta Anaesthesiol Scand 2012; 56:571-6. [PMID: 22260400 DOI: 10.1111/j.1399-6576.2011.02630.x] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/29/2011] [Indexed: 11/30/2022]
Abstract
BACKGROUND Ultrasound (US) may have an emerging role as an adjunct in verification of endotracheal intubation. Obtaining optimal US images in obese patients is generally regarded more difficult than for other patients. This study compared the time consumption of bilateral lung US with auscultation and capnography for verifying endotracheal intubation in obese patients. METHODS A prospective, paired and investigator-blinded study performed in the operating theatre. Twenty-four adult patients requiring endotracheal intubation for bariatric surgery were included. During post-intubation bag ventilation, bilateral lung US was performed for detection of lungsliding indicating lung ventilation simultaneous with capnography and auscultation of epigastrium and chest. Primary outcome measure was the time difference to confirmed endotracheal intubation between US and auscultation alone. The secondary outcome measure was time difference between US and auscultation combined with capnography. RESULTS Both methods verified endotracheal tube placement in all patients. No significant difference was found between US compared with auscultation alone. Median time for verification by auscultation alone was 47.5 s [interquartile (IQR) 40-51 s], with a mean difference of -0.3 s in favor of US (95% confidence interval -3.5-2.9 s) P = 0.87. Comparing US with the combination of auscultation and capnography, there was a significant difference between the two methods. Median time for verification by US was 43 s (IQR 40-51 s) vs. 55 s (IQR 46-65 s), P < 0.0001. CONCLUSION In obese patients, verification of endotracheal tube placement with US is as fast as auscultation alone and faster than the standard method of auscultation and capnography.
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Affiliation(s)
- P. PFEIFFER
- Akutcentrum/Anestesikliniken; Skåne University Hospital, SUS Malmø; Malmø; Sweden
| | - S. BACHE
- Department of Anaesthesia and Intensive Care Medicine; Copenhagen University Hospital; Glostrup; Denmark
| | - D. L. ISBYE
- Department of Anaesthesia and Intensive Care Medicine; Copenhagen University Hospital; Bispebjerg; Denmark
| | - S. S. RUDOLPH
- Department of Anaesthesia and Intensive Care Medicine; Copenhagen University Hospital; Bispebjerg; Denmark
| | - L. ROVSING
- Department of Anaesthesia and Intensive Care Medicine; Copenhagen University Hospital; Glostrup; Denmark
| | - J. BØRGLUM
- Department of Anaesthesia and Intensive Care Medicine; Copenhagen University Hospital; Bispebjerg; Denmark
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Green JS, Tsui BC. Head and Neck Ultrasound: Applications Relevant to Anesthesia and Intensive Care Medicine. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.cult.2011.12.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Dennington D, Vali P, Finer NN, Kim JH. Ultrasound confirmation of endotracheal tube position in neonates. Neonatology 2012; 102:185-9. [PMID: 22777009 DOI: 10.1159/000338585] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2011] [Accepted: 04/03/2012] [Indexed: 01/21/2023]
Abstract
BACKGROUND The placement of the endotracheal tube (ETT) in neonates is a challenging procedure that currently requires timely confirmation of tip placement by radiographic imaging. OBJECTIVE We sought to determine if bedside ultrasound (US) could demonstrate ETT tip location in preterm and term newborns and offer a quick alternative method of ETT positioning. METHODS We conducted a prospective pilot study of 30 newborns admitted to the UC San Diego Medical Center who had their ETT placement confirmed by chest radiographs. After a radiograph, each infant had a US exam with a 13-MHz linear transducer on a portable US machine. To assist localization, gentle longitudinal movement of the ETT of less than 0.5 cm was performed. Measurements from the tip of the ETT tip to the carina were made on chest radiograph and midsagittal US images. RESULTS Study infants had a mean gestational age of 30.2 ± 4.9 (SD) weeks and mean birth weight of 1,595.2 ± 862 g. US images were taken a mean 2.9 ± 2.2 h after radiographs. Data from 2 infants were excluded for poor radiograph image quality and extreme outlier values. The ETT was visualized by US in all newborns examined. We observed a good correlation between ETT tip-to-carina distance on US and radiograph (r(2) = 0.68) with minimal bias. Each study took less than 5 min to obtain without any clinical deterioration. CONCLUSIONS Bedside US can visualize the anatomic position of the ETT position in preterm and term infants but further validation is required before routine clinical implementation.
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Affiliation(s)
- Debra Dennington
- Division of Neonatology, Department of Pediatrics, University of California San Diego, San Diego, CA 92103-8774, USA
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KRISTENSEN MS. Ultrasonography in the management of the airway. Acta Anaesthesiol Scand 2011; 55:1155-73. [PMID: 22092121 DOI: 10.1111/j.1399-6576.2011.02518.x] [Citation(s) in RCA: 125] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/26/2011] [Indexed: 12/19/2022]
Abstract
In this study, it is described how to use ultrasonography (US) for real-time imaging of the airway from the mouth, over pharynx, larynx, and trachea to the peripheral alveoli, and how to use this in airway management. US has several advantages for imaging of the airway - it is safe, quick, repeatable, portable, widely available, and it must be used dynamically for maximum benefit in airway management, in direct conjunction with the airway management, i.e. immediately before, during, and after airway interventions. US can be used for direct observation of whether the tube enters the trachea or the esophagus by placing the ultrasound probe transversely on the neck at the level of the suprasternal notch during intubation, thus confirming intubation without the need for ventilation or circulation. US can be applied before anesthesia induction and diagnose several conditions that affect airway management, but it remains to be determined in which kind of patients the predictive value of such an examination is high enough to recommend this as a routine approach to airway management planning. US can identify the croicothyroid membrane prior to management of a difficult airway, can confirm ventilation by observing lung sliding bilaterally and should be the first diagnostic approach when a pneumothorax is suspected intraoperatively or during initial trauma-evaluation. US can improve percutaneous dilatational tracheostomy by identifying the correct tracheal-ring interspace, avoiding blood vessels and determining the depth from the skin to the tracheal wall.
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Affiliation(s)
- M. S. KRISTENSEN
- Department of Anaesthesia and Operating Theatre Services 4231; Center of Head and Orthopaedics; Copenhagen University Hospital; Rigshospitalet; Denmark
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PFEIFFER P, RUDOLPH SS, BØRGLUM J, ISBYE DL. Temporal comparison of ultrasound vs. auscultation and capnography in verification of endotracheal tube placement. Acta Anaesthesiol Scand 2011; 55:1190-5. [PMID: 22092123 DOI: 10.1111/j.1399-6576.2011.02501.x] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/26/2011] [Indexed: 11/28/2022]
Abstract
BACKGROUND This study compared the time consumption of bilateral lung ultrasound with auscultation and capnography for verifying endotracheal intubation. METHODS A prospective, paired, and investigator-blinded study carried out in the operating theatre. Twenty-five adult patients requiring endotracheal intubation were included. During intubation, transtracheal ultrasound was performed to visualize passage of the endotracheal tube. During bag ventilation, bilateral lung ultrasound was performed for the detection of lung sliding as a sign of ventilation simultaneous with capnography and auscultation of the epigastrium and chest. Primary outcome measure was time difference to confirmed endotracheal intubation between ultrasound and auscultation alone. Secondary outcome measure was time difference between ultrasound and auscultation combined with capnography. RESULTS Both methods verified endotracheal tube placement in all patients. In 68% of patients, endotracheal tube placement was visualized by real-time transtracheal ultrasound. Comparing ultrasound with the combination of auscultation and capnography, there was a significant difference between the two methods. Median time for ultrasound was 40 s [interquartile range (IQR) 35-48 s] vs. 48 s (IQR 45-53 s), P < 0.0001. Mean difference was -7.1 s in favour of ultrasound [95% confidence interval (CI) -9.4--4.8 s]. No significant difference was found between ultrasound compared with auscultation alone. Median time for auscultation alone was 42 s (IQR 37-47 s), P = 0.6, with a mean difference of -0.88 s in favour of ultrasound (95% CI -4.2-2.5 s). CONCLUSIONS Verification of endotracheal tube placement with ultrasound is as fast as auscultation alone and faster than the standard method of auscultation and capnography.
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Affiliation(s)
- P. PFEIFFER
- Akutcentrum/Anestesikliniken; Skåne University Hospital, SUS; Malmø; Sweden
| | - S. S. RUDOLPH
- Department of Anaesthesia and Intensive Care Medicine; Copenhagen University Hospital; Bispebjerg; Denmark
| | - J. BØRGLUM
- Department of Anaesthesia and Intensive Care Medicine; Copenhagen University Hospital; Bispebjerg; Denmark
| | - D. L. ISBYE
- Department of Anaesthesia and Intensive Care Medicine; Copenhagen University Hospital; Bispebjerg; Denmark
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