What Is Laryngoscopy?

Direct laryngoscopy is also called direct laryngoscopy. It uses direct laryngoscopy to observe the condition of the laryngeal cavity and can be used to perform intralaryngeal surgery or other laryngeal treatment.

Direct laryngoscopy

Direct laryngoscopy

Direct laryngoscope supine method

The subject lies on his back, his head and neck are placed outside the operating table, and his shoulders are close to the edge of the operating table. The assistant sits on the right front of the operating table, steps on the trapezoidal wooden box with his right foot, fixes the top of the subject's head with his left hand, and tilts his head back, supports the subject's pillow with his right hand, and raises his head above the operating table 10 ~ 15cm. The examiner stands in front of the subject's head. In children, an assistant should hold the shoulders and fix the limbs to prevent struggling.

Direct laryngoscopy

The subject was relaxed throughout the body, and opened his mouth to breathe calmly; after the examiner protected the upper teeth and upper lip of the subject with gauze, the left hand held a direct laryngoscope and led it into the pharynx along the middle of the back of the tongue or the right side. Tilt to the posterior wall of the pharynx; go about 1cm deeper so that the laryngoscope tip is placed below the epiglottis, raise the epiglottis, and lift the laryngoscope upward to expose the laryngeal cavity. However, the laryngoscope cannot be lifted upwards as the fulcrum of the upper incisor to prevent the teeth from falling out under pressure.

Direct laryngoscopy

The scope of the examination includes the tongue base, epiglottis valley, epiglottis, sacral epiglottis, sacral cartilage, ventricular zone, vocal cord, subglottic area, upper trachea, piriform fossa on both sides, posterior wall of laryngopharynx and posterior annulus. Attention should be paid to the mucosa color, shape, vocal cord movement, and the presence of new organisms.

During direct laryngoscopy, because the subject's orientation is the same as that of the examiner, the left and right positions of the vocal cords are opposite to those seen under the indirect laryngoscope.