Stroboscopy is one of the main methods of research of the vocal cords. During diagnostics, the device records the high-speed movement (vibration). This is the so-called strobe effect.
This research technique has been working for a very long time, and with the development of new technologies it is still being used. The purpose of stroboscopy is to diagnose any abnormalities in the operation of the vocal cords.
The essence of stroboscopy
The main task of stroboscopy is the study of the functionality of the vocal cords. The essence of the procedure lies in the fact that a special device sends light beams to the bundles. The promise itself passes intermittently. Formed so-called flash. So they determine exactly where the ligaments are when sound waves fall on them. The endoscope captures all background changes and records them on video. Already according to these results the specialist makes a diagnosis.
This light beam should pulsate in the same way as the ligamentous apparatus vibrates. To achieve this, doctors regulate the device for each patient. Thanks to the stroboscopy, it is possible to notice in time even the slightest deviations in the functioning of the ligamentous apparatus, while other techniques cannot do this.
This diagnosis of the vocal cords is considered one of the most informative methods. Thanks to her, experts explore the functionality of the larynx and vocal apparatus. The main difference from other diagnostic measures is the assessment of the condition of the ligaments during work, while other methods only evaluate the appearance of the vocal cords or other organs and tissues in the larynx area.
In the process of stroboscopy, video endoscopy, video fibrolaryngoscopy, computer acoustic voice diagnostics, and autofluorescent endoscopy are performed. If specialists have suspicions that tumor processes affect the mucous membrane and laryngeal tissue, then computed tomography and magnetic resonance imaging are additionally prescribed.
If it is necessary to diagnose a small child, then video fibrolaryngoscopy is prescribed. It gives the little patient less discomfort than stroboscopy.
When a stroboscopy is prescribed and what are the contraindications
Critical contraindications of this research method has not. The only thing that it does not hold children under five years old.
Stroboscopy is also prescribed with caution to patients with individual characteristics.
Doctors may prescribe this diagnostic procedure in cases where:
- there are suspicions of the development of tumor processes in the region of the larynx and vocal cords;
- the vocal cords and larynx were injured;
- there is the presence of possible inflammatory processes in the larynx area (inflammation of the tonsils or inflammation of the mucous membrane and lymphoid tissue of the larynx);
- there is the presence of any disturbances on the part of vocalization (qualitative disturbance of the voice, loss of sonorous voice, weakening of the closure of the ligaments);
- the doctor has suspected trauma to the nerves that innervate the larynx.
Most often, the above violations are observed in people who smoke or drink.
The doctor may also prescribe this diagnosis if the patient coughs long and hard, the voice timbre changes, feels the presence of a foreign body in the larynx area. Hoarseness is also the main indication for stroboscopy.
With the help of stroboscopy, the doctor can diagnose many diseases in the larynx, namely: chronic atrophic and hypertrophic laryngitis; reduced motor activity of the guttural muscles; neoplasms on the mucous membrane of the larynx; laryngeal infectious disease caused by the multiplication of mycobacterium tuberculosis; alien objects in the larynx.
How to prepare for stroboscopy and how to spend it?
Before stroboscopy, experts prescribe laryngoscopy. This allows physicians to assess the state of the anatomical structure of the larynx and nearby structures. Also, before the procedure itself, namely for two or three hours, it is recommended not to eat or drink something that may contribute to irritation of the mucous membrane.
The procedure itself is carried out in a sitting or lying position. Doctors injected into the oral cavity endovokameru, which is located at the end of the strobe. After full introduction, the patient is asked to pronounce the vowels in any order. As a rule, at first the sounds should be middle register, and then gradually shift higher and lower.
All changes are captured by a special sensor and sent to the screen as a photo or video. By decoding the results obtained, the doctor can make a diagnosis.
At the time of the study, the physician should examine several parameters. So, in a healthy person: the amplitude of vibrations of the vocal cords changes depending on the strength of the sound; all vocal cords should oscillate symmetrically, that is, equally; they are located on the same level; during the making of various sounds, the folds of the ligaments must be completely closed.
If during diagnostics specialists noticed that the amplitude of oscillations is constant, the vocal cords move at different speeds and are not located on the same level, then we can safely say that a tumor or inflammatory process develops in the larynx.
Are there any complications during stroboscopy?
As medical practice shows, the development of complications after this procedure is practically not encountered. In rare cases when the doctor inserts a special device, the mucous membrane of the larynx or the ligaments themselves can be damaged. Injury can also occur as a result of involuntary displacement of the endovideostroboscope in the larynx area.
The main value of this diagnostic measure is that doctors can diagnose in time all kinds of pathological processes that affect the mucous membrane and laryngeal tissue. Today, stroboscopy has no equal.
In medical practice, it is called the most valuable diagnostic method, which allows to evaluate the functionality of the larynx and voice apparatus.