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. 2023 May 7;11(1):70–80. doi: 10.2478/jtim-2022-0044

Figure 2.

Figure 2

Correspondence of the bronchoscopic view of the inner tracheal wall with the submucosal injection of methylene blue guided by transcutaneous POCUS (A) Bronchoscopic manifestation of ex vivo porcine trachea after submucosal injection of methylene blue guided by transcutaneous POCUS. (B–D) The process of submucosal injection of methylene blue guided by POCUS. The blue triangle indicates the injection needle. The red arrow indicates the thickening of the submucosal layer with the medication injection. POCUS: point-of-care ultrasound.