Part 2A Normal Anatomy Upper airway and Larynx

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1 Part 2A Normal Anatomy Upper airway and Larynx
Series of Web-based Bronchoscopic Images BRONCHATLAS© Prepared By Bronchoscopy International Contact us at BI, All Rights Reserved, 2005

2 The Upper Airway The upper airway starts :
At the nostrils, extends through the nasal conchae to the nasopharynx, over the uvula to the hypopharynx and larynx, or, At the lips, extends through the oral cavity, over the tongue and below the hard and soft palates, to the hypopharynx and larynx. BI, All Rights Reserved, 2005

3 Upper Airway: From Pharynx to Larynx
Uvula Epiglottis Larynx Lingual Tonsil Midline guidance: “The uvula points to the epiglottis, the epiglottis leads into the larynx”. BI, All Rights Reserved, 2005

4 The Larynx The larynx is a 5-7 cm long structure.
Its upper boundary starts at the tip of the epiglottis, opposite the 3rd to 4th, cervical vertebra. Its lower end is at the lower border of the cricoid cartilage. This lies opposite the 6th cervical vertebra. BI, All Rights Reserved, 2005

5 The Larynx Superior surface anatomy: Major Landmarks I
Surface of Epiglottis Posterior Wall of Hypopharynx (Leading to Esophagus) Lateral Glossoepiglottic Folds Median Fold Vallecula Superior surface anatomy: Major Landmarks I Base of Tongue BI, All Rights Reserved, 2005

6 Cricothyroid membrane
The Cricoid cartilage Cricoid Cartilage Thyroid gland Thyroid cartilage Cricoid cartilage Cricothyroid membrane BI, All Rights Reserved, 2005

7 Time Out! … Why is it so important to recognize the surface anatomy?
As a bronchoscopist, we are responsible to report any nasal, oral, pharyngeal or laryngeal pathology that we observe en-route to the lungs. We only know that we are correctly positioned and in the midline, when we know exactly where we are. During a difficult intubation, either with a bronchoscope or a rigid laryngoscope, knowledge of surface anatomy ensures timely intubation and saves a life. In a variety of conditions, such as GERD, changes in laryngeal anatomy and structures, are the best clues to pulmonary pathology. Shall we continue? BI, All Rights Reserved, 2005

8 The Larynx Superior surface anatomy: Major Landmarks - II Pyriform
Ventricle Pyriform Sinus Laryngeal Surface of Epiglottis Posterior Wall of Hypopharynx (Leading to Esophagus) Superior surface anatomy: Major Landmarks - II BI, All Rights Reserved, 2005

9 The Larynx Superior surface anatomy: Major Landmarks - III Pyriform
Vallecula Pyriform Sinus Epiglottis Superior surface anatomy: Major Landmarks - III BI, All Rights Reserved, 2005

10 The Larynx Superior surface anatomy: Major Landmarks - IV Posterior
Aryepiglottic Fold Posterior Commissure Anterior Ventricle True Vocal Cords False Superior surface anatomy: Major Landmarks - IV BI, All Rights Reserved, 2005

11 The Larynx Superior surface anatomy: Major Landmarks - V
Aryepiglottic Fold Posterior Wall Of Hypopharynx Corniculate Tubercle on Arytenoid Cartilage Cuneiform Tubercle Superior surface anatomy: Major Landmarks - V BI, All Rights Reserved, 2005

12 The Larynx Superior surface anatomy: Major Landmarks - VI Arytenoid
Cartilage True Vocal Cords False Ventricle Superior surface anatomy: Major Landmarks - VI BI, All Rights Reserved, 2005

13 The Larynx Superior surface anatomy: Major Landmarks to look for - VII
Cartilaginous Rings of Trachea True Vocal Cords Vocal Cord Sulcus (on True Vocal Cords) Cricoid Ring False Superior surface anatomy: Major Landmarks to look for - VII BI, All Rights Reserved, 2005

14 This is the.. The epiglottis The ventricle The arytenoid cartilage
The true vocal cord The false vocal cord B Click for correct answer: BI, All Rights Reserved, 2005

15 The Larynx: Anatomy The structural rigidity of the larynx is provided by the three median cartilages: The epiglottis Thyroid cartilage Cricoid cartilage , along with the hyoid bone. The thyrohyoid membrane forms a C-shaped barrier around the anterior and lateral walls of the supraglottis, and inferiorly becomes confluent with the connective tissue in the perichondrium of the tracheal cartilaginous rings. BI, All Rights Reserved, 2005

16 The Larynx: Anatomy The six smaller cartilages of the larynx ( 3 pairs) are functionally involved with the movements of the vocal cords. These are: The arytenoids The corniculates The cuneiforms The arytenoid cartilages are pyramid-shaped and articulate with the superior margin of the cricoid lamina. On their summit, are the corniculate cartilages; on their anterior aspect, the cuneiform cartilages BI, All Rights Reserved, 2005

17 The Larynx: Anatomy The vocal ligaments, are attached posteriorly to the apex of the arytenoids and corniculates. The cuneiforms extend laterally, between the layers of the vocal cords, from the anterior aspect of the arytenocorniculate complex. The epiglottis is attached to the base of the tongue by a median and two lateral glossoepiglottic folds. BI, All Rights Reserved, 2005

18 The Larynx: Critical Structures
The Larynx neighbors major critical structures: Carotid arteries and jugular veins, and the vagus nerve Superior and inferior thyroid arteries Superior and recurrent laryngeal nerves BI, All Rights Reserved, 2005

19 The Larynx: Topical Anesthesia
Bilateral nasal administration of anesthetic provides partial posterior pharyngeal anesthesia by affecting the Sphenopalatine nerve fibers, thus diminishing the gag reflex. Ask patient to inhale deeply through nostril BI, All Rights Reserved, 2005

20 The Larynx: Topical Anesthesia
Topical anesthetic usually affects the superior laryngeal nerve and blocks sensory innervation to the base of the tongue epiglottis, pyriform fossa, and valleculae. Click here to view video presentation Click to continue BI, All Rights Reserved, 2005

21 The Larynx: Topical Anesthesia
The topical instillation of Lidocaine with the “Spray as you go” method numbs the submucosal plexus of the larynx, derived from the external and internal branches of the superior laryngeal nerve. Click here to view video presentation Click to continue BI, All Rights Reserved, 2005

22 Laryngeal function: Airway Protection
The glottis: open for inspiration and closed for swallowing Open Closed BI, All Rights Reserved, 2005

23 Laryngeal function: Phonation
The vocal cords: Adducted for phonation; abducted for inspiration Adducted: Talking Abducted: Breathing BI, All Rights Reserved, 2005

24 Laryngeal function: Phonation
The vocal cords open and close while talking Click here to view video presentation Click to continue BI, All Rights Reserved, 2005

25 Which of the following defends against aspiration?
The epiglottis The false cords The true cords The ventricle All of the above E Click for correct answer: BI, All Rights Reserved, 2005

26 This presentation is part of a comprehensive curriculum for Flexible Bronchoscopy. Our goals are to help health care workers become better at what they do, and to decrease the burden of procedure-related training on patients. BI, All Rights Reserved, 2005

27 DEMOCRATIZATION AND GLOBALIZATION OF KNOWLEDGE
Step by Step© A new curriculum Assured competency and proficiency Web-based Self-learning study guide. Computer-based simulations, didactic lectures, and image encyclopedia. Bronchoscopy step-by-step©: Practical exercises, skills and tasks, competency testing. Guided apprenticeship. Learning the art of Bronchoscopy. BRONCHATLAS© DEMOCRATIZATION AND GLOBALIZATION OF KNOWLEDGE BI, All Rights Reserved, 2005

28 All efforts are made by Bronchoscopy International to maintain currency of online information. All published multimedia slide shows, streaming videos, and essays can be cited for reference as: Bronchoscopy International: BronchAtlas©, an Electronic On-Line Multimedia Slide Presentation. Published 2005 (Please add “Date Accessed”). BRONCHATLAS© Thank you BI, All Rights Reserved, 2005