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Ultrasound: A novel tool for airway imaging.

Parmar SB, Mehta HK, Shah NK, Parikh SN, Solanki KG - J Emerg Trauma Shock (2014)

Bottom Line: We included 100 adult, healthy volunteers of either sex to undergo airway imaging systemically starting from floor of the mouth to the sternal notch in anterior aspect of neck by sonography.Interface between air and mucosa lining the airway produced a bright hyperechoic linear appearance.Artifacts created by intraluminal air prevented visualization of posterior pharynx, posterior commissure, and posterior wall of trachea.

View Article: PubMed Central - PubMed

Affiliation: Department of Anaesthesiology, Byramjee Jeejeebhoy Medical College, Ahmedabad, Gujarat, India.

ABSTRACT

Context: The scope of ultrasound is emerging in medical science, particularly outside traditional areas of radiology practice.

Aims: We designed this study to evaluate feasibility of bedside sonography as a tool for airway assessment and to describe sonographic anatomy of airway.

Settings and design: A prospective, clinical study.

Materials and methods: We included 100 adult, healthy volunteers of either sex to undergo airway imaging systemically starting from floor of the mouth to the sternal notch in anterior aspect of neck by sonography.

Results: We could visualize mandible and hyoid bone as a bright hyperechoic structure with hypoechoic acoustic shadow underneath. Epiglottis, thyroid cartilage, cricoid cartilage, and tracheal rings appeared hypoechoic. Vocal cords were visualized through thyroid cartilage. Interface between air and mucosa lining the airway produced a bright hyperechoic linear appearance. Artifacts created by intraluminal air prevented visualization of posterior pharynx, posterior commissure, and posterior wall of trachea.

Conclusions: Ultrasound is safe, quick, noninvasive, repeatable, and bedside tool to assess the airway and can provide real-time dynamic images relevant for several aspects of airway management.

No MeSH data available.


Related in: MedlinePlus

Transverse view at level of thyroid cartilage using a linear transducer. The scan shows vocal cords (VC), vocalis muscles (VM), arytenoid cartilage (AC), thyroid cartilage (TC), and strap muscles (SM)
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Figure 8: Transverse view at level of thyroid cartilage using a linear transducer. The scan shows vocal cords (VC), vocalis muscles (VM), arytenoid cartilage (AC), thyroid cartilage (TC), and strap muscles (SM)

Mentions: We imaged vocal cords through thyroid cartilage window in a transverse view [Figures 7 and 8]. We could identify and distinguish the true and false vocal cords just by sliding the linear transducer in cephalocaudal direction over thyroid cartilage in all volunteers. True vocal cords appeared as two triangular hypoechoic structures (vocalis muscles), outlined by hyperechoic vocal ligaments. The false vocal cords lay parallel and cephalad to true vocal cords and appeared hyperechoic. False vocal cords remained relatively immobile during phonation.[56789]


Ultrasound: A novel tool for airway imaging.

Parmar SB, Mehta HK, Shah NK, Parikh SN, Solanki KG - J Emerg Trauma Shock (2014)

Transverse view at level of thyroid cartilage using a linear transducer. The scan shows vocal cords (VC), vocalis muscles (VM), arytenoid cartilage (AC), thyroid cartilage (TC), and strap muscles (SM)
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4126113&req=5

Figure 8: Transverse view at level of thyroid cartilage using a linear transducer. The scan shows vocal cords (VC), vocalis muscles (VM), arytenoid cartilage (AC), thyroid cartilage (TC), and strap muscles (SM)
Mentions: We imaged vocal cords through thyroid cartilage window in a transverse view [Figures 7 and 8]. We could identify and distinguish the true and false vocal cords just by sliding the linear transducer in cephalocaudal direction over thyroid cartilage in all volunteers. True vocal cords appeared as two triangular hypoechoic structures (vocalis muscles), outlined by hyperechoic vocal ligaments. The false vocal cords lay parallel and cephalad to true vocal cords and appeared hyperechoic. False vocal cords remained relatively immobile during phonation.[56789]

Bottom Line: We included 100 adult, healthy volunteers of either sex to undergo airway imaging systemically starting from floor of the mouth to the sternal notch in anterior aspect of neck by sonography.Interface between air and mucosa lining the airway produced a bright hyperechoic linear appearance.Artifacts created by intraluminal air prevented visualization of posterior pharynx, posterior commissure, and posterior wall of trachea.

View Article: PubMed Central - PubMed

Affiliation: Department of Anaesthesiology, Byramjee Jeejeebhoy Medical College, Ahmedabad, Gujarat, India.

ABSTRACT

Context: The scope of ultrasound is emerging in medical science, particularly outside traditional areas of radiology practice.

Aims: We designed this study to evaluate feasibility of bedside sonography as a tool for airway assessment and to describe sonographic anatomy of airway.

Settings and design: A prospective, clinical study.

Materials and methods: We included 100 adult, healthy volunteers of either sex to undergo airway imaging systemically starting from floor of the mouth to the sternal notch in anterior aspect of neck by sonography.

Results: We could visualize mandible and hyoid bone as a bright hyperechoic structure with hypoechoic acoustic shadow underneath. Epiglottis, thyroid cartilage, cricoid cartilage, and tracheal rings appeared hypoechoic. Vocal cords were visualized through thyroid cartilage. Interface between air and mucosa lining the airway produced a bright hyperechoic linear appearance. Artifacts created by intraluminal air prevented visualization of posterior pharynx, posterior commissure, and posterior wall of trachea.

Conclusions: Ultrasound is safe, quick, noninvasive, repeatable, and bedside tool to assess the airway and can provide real-time dynamic images relevant for several aspects of airway management.

No MeSH data available.


Related in: MedlinePlus