Bedside ultrasonography in confirming and monitoring endotracheal tube placement: a narrative review and implications for nursing practice in Poland
DOI:
https://doi.org/10.12923/pielxxiw-2026-0028Keywords:
point-of-care ultrasound, POCUS, endotracheal intubation, intubation confirmation, nursingAbstract
Introduction. Effective and rapid confirmation of endotracheal tube (ETT) placement is vital for patient safety. Traditional methods such as capnography or chest auscultation have diagnostic limitations, especially in emergencies or at low pulmonary perfusion. The increasing use of point-of-care ultrasound (POCUS) offers opportunities to expand nursing competencies.
Aim. This narrative review presents ultrasound techniques used to confirm and monitor ETT placement, compares their effectiveness with classical methods, and evaluates their potential implementation in nursing practice.
Material and methods. The review followed the SANRA guidelines. Databases PubMed, Embase, and Scopus (1992–2025) were searched, yielding 52 eligible publications. The analysed studies included randomized trials, prospective and cross-sectional studies, case series, and systematic or narrative reviews. Studies in which ultrasound was used only as an adjunct to intubation were excluded.
Results. Point-of-care ultrasound (POCUS) shows high accuracy in confirming ETT placement – many studies report sensitivity and specificity above 95%, with confirmation times of only a few seconds. Protocols such as TRUE and 5-AIR standardize the procedure and improve safety. Compared with capnography and auscultation, ultrasound is faster and less dependent on haemodynamics. Limitations include study heterogeneity, single-centre designs and risk of artefacts. Implementation in nursing practice requires structured training, immediate equipment access and clear team roles.
References
1. Minister Nauki. Rozporządzenie z dnia 10 października 2024 r. zmieniające rozporządzenie w sprawie standardów kształcenia przygotowującego do wykonywania zawodu lekarza, lekarza dentysty, farmaceuty, pielęgniarki, położnej, diagnosty laboratoryjnego, fizjoterapeuty i ratownika medycznego. Dz. U. 2024, poz. 1514.
2. Li J. Capnography alone is imperfect for endotracheal tube placement confirmation during emergency intubation. J. Emerg. Med. 2001;20(3):223-229. https://doi.org/10.1016/s0736-4679(00)00318-8
3. Ward KR, Yealy DM. End-tidal carbon dioxide monitoring in emergency medicine, Part 2: Clinical applications. Acad. Emerg. Med. 1998;5(6):637-646. https://doi.org/10.1111/j.1553-2712.1998.tb02474.x
4. Ramsingh D, Frank E, Haughton R, et al. Auscultation versus Point-of-care Ultrasound to Determine Endotracheal versus Bronchial Intubation: A Diagnostic Accuracy Study. Anesthesiology. 2016;124(5):1012-1020. https://doi.org/10.1097/ ALN.0000000000001073
5. Hoffmann B, Gullett JP, Hill HF, et al. Bedside ultrasound of the neck confirms endotracheal tube position in emergency intubations. Ultraschall Med. 2014;35(5):451-458. https://doi.org/10.1055/s-0034-1366014
6. Baruah A, Ahmad Z, Waindeskar V, et al. 5-point airway (5-AIR) ultrasound protocol for confirmation of endotracheal intubation and position in paediatric patients undergoing surgery: A prospective observational study. Indian J. Anaesth. 2024;68(12):1068-1074. https://doi.org/10.4103/ija.ija_682_24
7. Trikha A, Tharion JG. OPOCUS – Obstetric point-of-care ultrasound: An essential tool for the obstetric anesthesiologist. J. Obstet. Anaesth. Crit. Care. 2025;15(1):1-3. https://doi.org/10.4103/JOACC.JOACC_6_25
8. Abbasi S, Farsi D, Zare MA, et al. Direct ultrasound methods: a confirmatory technique for proper endotracheal intubation in the emergency department. Eur. J. Emerg. Med. 2015;22(1):10-16. https://doi.org/10.1097/MEJ.0000000000000108
9. Kuppusamy A, Mirunalini G, Koka MV, et al. Comparison of real-time ultrasound with capnography to confirm endotracheal tube position in patients in critical care unit – A cross-sectional study. Bali J. Anesthesiol. 2022;6(1):43-48. https://doi.org/10.4103/bjoa.bjoa_171_21
10. Gottlieb M, Nakitende D, Sundaram T, et al. Comparison of static versus dynamic ultrasound for the detection of endotracheal intubation. West J. Emerg. Med. 2018;19(2):412-416. https://doi.org/10.5811/westjem.2017.12.36714
11. Weaver B, Lyon M, Blaivas M. Confirmation of endotracheal tube placement after intubation using the ultrasound sliding lung sign. Acad. Emerg. Med. 2006;13(3):239-244. https://doi.org/10.1197/j.aem.2005.08.014
12. Riveros-Perez E, Avella-Molano B, Rocuts A. Airway ultrasound: A narrative review of present use and future applications in anesthesia. Healthcare. 2025;13(13):1502. https://doi.org/10.3390/healthcare13131502
13. Kerforne T, Petitpas F, Scepi M, et al. Accurate and easy to learn ultrasound sign to confirm correct tracheal intubation in cadaver model. Br. J. Anaesth. 2013;111(3):510¬511. https://doi.org/10.1093/bja/aet270
14. Hoo S, Miller A, Pheasant J. An educational module on ultrasound guided endotracheal tube sizing and placement verification in the pediatric surgical patient. Nicole Wertheim College of Nursing Student Projects. Florida International University, 2024.
15. Tsung JW, Fenster D, Kessler DO, et al. Dynamic anatomic relationship of the esophagus and trachea on sonography: implications for endotracheal tube confirmation in children. J Ultrasound. Med. 2012;31(9):1365-1370. https://doi.org/10.7863/jum.2012.31.9.1365
16. Chen X, Zhai W, Yu Z, et al. Determining correct tracheal tube insertion depth by measuring distance between endotracheal tube cuff and vocal cords by ultrasound in Chinese adults: a prospective case-control study. BMJ Open. 2018;8(12):e023374. https://doi.org/10.1136/bmjopen-2018-023374
17. Hoffmann B, Gullett JP. Emergency ultrasound for the detection of esophageal intubation. Acad. Emerg. Med. 2010;17(4):464-465. https://doi.org/10.1111/j.1553-2712.2010.00690.x
18. Ornato JP, Shipley JB, Racht EM, et al. Multicenter study of a portable, hand-size, colorimetric end-tidal carbon dioxide detection device. Ann. Emerg. Med. 1992;21(5):518-523. https://doi.org/10.1016/s0196-0644(05)82517-x
19. Werner SL, Smith CE, Goldstein JR, et al. Pilot study to evaluate the accuracy of ultrasonography in confirming endotracheal tube placement. Ann. Emerg. Med. 2007;49(1):75-80. https://doi.org/10.1016/j.annemergmed.2006.07.004
20. Sreedevi J, Neethu G, Anjali G, et al. A randomised control study comparing ultrasonography with standard clinical methods in assessing endotracheal tube tip positioning. J. Crit. Care Med (Targu Mures). 2024;10(2):177-182. https://doi.org/10.2478/jccm-2024-0019
21. Ma G, Davis DP, Schmitt J, et al. The sensitivity and specificity of transcricothyroid ultrasonography to confirm endotracheal tube placement in a cadaver model. J. Emerg. Med. 2007;32(4):405-407. https://doi.org/10.1016/j.jemermed.2006.08.023
22. Vieira D, Lages N, Dias J, et al. Ultrasound-guided retrograde intubation. Anaesthesia. 2013;68(10):1075-1076. https://doi.org/10.1111/anae.12430
23. Datta S, Sankar J, Pathak M, et al. Diagnostic accuracy of airway ultrasound in confirming the endotracheal tube depth in critically ill children. Am. J. Emerg. Med. 2024;85:52-58. https://doi.org/10.1016/j.ajem.2024.08.012
24. Gottlieb M, Burns K, Holladay D, et al. Impact of endotracheal tube twisting on the diagnostic accuracy of ultrasound for intubation confirmation. Am. J. Emerg. Med. 2020;38(7):1332-1334. https://doi.org/10.1016/j.ajem.2019.10.032
25. Sustić A, Protić A, Cicvarić T, et al. The addition of a brief ultrasound examination to clinical assessment increases the ability to confirm placement of double-lumen endotracheal tubes. J. Clin. Anesth. 2010;22(4):246-249. https://doi.org/10.1016/j.jclinane.2009.07.010
26. Zechner PM, Breitkreutz R. Ultrasound instead of capnometry for confirming tracheal tube placement in an emergency? Resuscitation. 2011;82(10):1259-1261. https://doi.org/10.1016/j.resuscitation.2011.06.040
27. Austin DR, Chang MG, Bittner EA. Use of handheld point-of-care ultrasound in emergency airway management. Chest. 2021;159(3):1155-1165. https://doi.org/10.1016/j.chest.2020.09.083
28. Riveros-Perez E, Avella-Molano B, Rocuts A. Airway ultrasound: A narrative review of present use and future applications in anesthesia. Healthcare. 2025;13(13):1502. https://doi.org/10.3390/healthcare13131502
29. Chou HC, Tseng WP, Wang CH, et al. Tracheal rapid ultrasound exam (T.R.U.E.) for confirming endotracheal tube placement during emergency intubation. Resuscitation. 2011;82(10):1279-1284. https://doi.org/10.1016/j.resuscitation.2011.05.016
30. Sustić A, Miletić D, Protić A, et al. Can ultrasound be useful for predicting the size of a left double-lumen bronchial tube? Tracheal width as measured by ultrasonography versus computed tomography. J. Clin. Anesth. 2008;20(4):247-252. https://doi.org/10.1016/j.jclinane.2007.11.002
31. Song K, Yi J, Liu W, et al. Confirmation of laryngeal mask airway placement by ultrasound examination: a pilot study. J. Clin. Anesth. 2016;34:638-646. https://doi.org/10.1016/j.jclinane.2016.06.019
32. Neethirajan SGR, Baskar G, Parameswari A. Focus on POCUS: identification of early successful intubation by point-of-care ultrasound versus end-tidal carbon dioxide: a prospective comparative study. Turk. J. Anaesthesiol. Reanim. 2024;52(6):240-246. https://doi.org/10.4274/TJAR.2024.241720
33. Chou EH, Dickman E, Tsou PY, et al. Ultrasonography for confirmation of endotracheal tube placement: a systematic review and meta-analysis. Resuscitation. 2015;90:97¬103. https://doi.org/10.1016/j.resuscitation.2015.02.013
34. Pourmand A, Lee D, Davis S, et al. Point-of-care ultrasound utilizations in the emergency airway management: An evidence-based review. Am. J. Emerg. Med. 2017;35(8):1202-1206. https://doi.org/10.1016/j.ajem.2017.02.032
35. Takeda T, Tanigawa K, Tanaka H, et al. The assessment of three methods to verify tracheal tube placement in the emergency setting. Resuscitation. 2003;56(2):153¬157. https://doi.org/10.1016/s0300-9572(02)00345-3
36. Gottlieb M, Holladay D, Nakitende D, et al. Variation in the accuracy of ultrasound for the detection of intubation by endotracheal tube size. Am. J. Emerg. Med. 2019;37(4):706-709. https://doi.org/10.1016/j.ajem.2018.07.026
37. Park SC, Ryu JH, Yeom SR, et al. Confirmation of endotracheal intubation by combined ultrasonographic methods in the Emergency Department. Emerg. Med. Australas. 2009;21(4):293-297. https://doi.org/10.1111/j.1742-6723.2009.01199.x
38. Channawar KS, Harsha KS, Kiranmayee P. Feasibility of three window point of care ultrasound in endotracheal tube positioning in the level III pediatric intensive care unit. Int. J. Contemp. Pediatr. 2024;11(11):1540-1544. https://doi.org/10.18203/2349-3291.ijcp20243078
39. Zetlaoui PJ. Ultrasonography for airway management. Anaesth. Crit. Care Pain. Med. 2021;40(2):100821. https://doi.org/10.1016/j.accpm.2021.100821
40. Pfeiffer P, Rudolph SS, Børglum J, et al. Temporal comparison of ultrasound vs. auscultation and capnography in verification of endotracheal tube placement. Acta Anaesthesiol. Scand. 2011;55(10):1190-1195. https://doi.org/10.1111/j.1399-6576.2011.02501.x
41. Thomas VK, Paul C, Rajeev PC, et al. Reliability of ultrasonography in confirming endotracheal tube placement in an emergency setting. Indian. J. Crit. Care Med. 2017;21(5):257-261. https://doi.org/10.4103/ijccm.IJCCM_417_16
42. Tessaro MO, Arroyo AC, Haines LE, et al. Inflating the endotracheal tube cuff with saline to confirm correct depth using bedside ultrasonography. CJEM. 2015;17(1):94¬5. 98. https://doi.org/10.2310/8000.2014.141296
43. Sakles JC, Ross C, Kovacs G. Preventing unrecognized esophageal intubation in the emergency department. J. Am. Coll. Emerg. Physicians Open. 2023;4(3):e12951. https://doi.org/10.1002/emp2.12951
44. 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(6):627-636. https://doi.org/10.1016/j.annemergmed.2018.06.024
45. Zhu SY, Liu RC, Chen LH, et al. Sonographic anatomy of the cervical esophagus. J. Clin. Ultrasound. 2004; 32(4): 163-171. https://doi.org/10.1002/jcu.20017
46. Milling TJ, Jones M, Khan T, et al. Transtracheal 2-d ultrasound for identification of esophageal intubation. J. Emerg. Med. 2007;32(4):409-414. https://doi.org/10.1016/j.jemermed.2006.08.022
47. Gottlieb M, Holladay D, Burns KM, et al. Ultrasound for airway management: An evidence-based review for the emergency clinician. Am. J. Emerg. Med. 2020;38(5):1007-1013. https://doi.org/10.1016/j.ajem.2019.12.019
48. Das SK, Choupoo NS, Haldar R, et al. Transtracheal ultrasound for verification of endotracheal tube placement: a systematic review and meta-analysis. Can. J. Anaesth. 2015;62(4):413-423. https://doi.org/10.1007/s12630-014-0301-z
49. Altun D, Orhan-Sungur M, Ali A, et al. The role of ultrasound in appropriate endotracheal tube size selection in pediatric patients. Paediatr. Anaesth. 2017;27(10):1015-1020. https://doi.org/10.1111/pan.13220
50. Abraham S, Himarani J, Mary Nancy S, et al. Ultrasound as an assessment method in predicting difficult intubation: A prospective clinical study. J. Maxillofac Oral. Surg. 2018;17(4):563-569. https://doi.org/10.1007/s12663-018-1088-1
51. Valentin L, Irving H, Evans DH, et al. Minimum training recommendations for the practice of medical ultrasound. Ultraschall. Med. 2005;26(EFSUMB Newsletter): 79¬105.
52. International Council of Nurses. Guidelines on Advanced Practice Nursing. Genve: ICN; 2020.
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