Laryngeal air column width ratio in predicting post extubation stridor

Pradeep M Venkategowda, Kranthi Mahendrakar, S Manimala Rao, Dnyaneshwar P Mutkule, Chetan G Shirodkar, H Yogesh, Pradeep M Venkategowda, Kranthi Mahendrakar, S Manimala Rao, Dnyaneshwar P Mutkule, Chetan G Shirodkar, H Yogesh

Abstract

Aim: Correlation of upper air column width ratio in postextubation stridor patients.

Materials and methods: A prospective observational study was conducted in a tertiary hospital between January and December 2013. Patients who were admitted in Intensive Care Unit and intubated for >24 h were included (72 patients). The upper airway air column width ratio (air column width before extubation/air column width after intubation) was calculated and compared in patient with or without postextubation stridor.

Results: The incidence of stridor was 6.9% (5/72). The duration of mechanical ventilation was 5.60 ± 1.14 days and 3.91 ± 1.45 days in stridor and nonstridor group respectively. In all 5 patients who had stridor, the upper airway air column width ratio was 0.8 or less.

Conclusion: Air column width ratio of 0.8 or less may be helpful in predicting postextubation stridor, which should be confirmed by large observational studies.

Keywords: Air column width; cricothyroid membrane; cuff leak test; postextubation stridor; ultrasound.

Conflict of interest statement

Conflict of Interest: None declared.

Figures

Figure 1
Figure 1
Performing laryngeal ultrasound in intubated patient at the level of cricothyroid
Figure 2
Figure 2
Air column width (0.57 cm) immediately after intubation with cuff deflated
Figure 3
Figure 3
Air column width (0.42 cm) of same patient 3 h before extubation with cuff deflated and the air column width ratio of 0.73. This patient had stridor after extubation

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