Presentation on theme: "Current Diagnosis and Treatment of Voice Disorders Seth H. Dailey, MD Assistant Professor University of Wisconsin Hospital and Clinics University of Wisconsin."— Presentation transcript:
Current Diagnosis and Treatment of Voice Disorders Seth H. Dailey, MD Assistant Professor University of Wisconsin Hospital and Clinics University of Wisconsin School of Medicine Internal Medicine Grand Rounds: February 28 th, 2007
Laryngeal Anatomy Three surrounding structures- pharynx, trachea and esophagus Three levels - supraglottis, glottis and subglottis Three fixed structures - hyoid, thyroid and cricoid Three mobile structures -epiglottis, false vocal cords and true vocal cords (folds)
Laryngeal Physiology Three main functions - airway, swallowing and voice Three criteria for voice- generator, vibrator resonator Three components for high quality glottic voice - closure, pliability and symmetry
Common disorders affect the “magic three” Closure - neuromuscular, joint, vocal fold Pliability - “golden layer” - mass, scar Symmetry - tension and viscoelasticity VOICE DISORDERS ARISE FROM A COMBINATION OF THESE ELEMENTS
Differential Diagnosis of Hoarseness Vocal quality- determined by: –distance between vocal cords, –tenseness of the cords –how rapid cords vibrate Hoarseness is caused by –
Differential Diagnosis of Hoarseness Types of voice Breathy- vocal cords do not approximate so air escapes. Raspy- harsh voice. Cord thickening due to edema or inflammation. Voice is low in pitch and poor quality
Differential Diagnosis of Hoarseness Types of voice Muffled voice- painful dysphagia and dyspnea Shaky- high pitch or low soft. –Elderly –debilitated
Differential Diagnosis of Hoarseness Acute Hoarseness/Acute Laryngitis Laryngeal mucous membrane infection, usually viral (adenovirus/ influenza, RSV, coxsackie, rhinovirus) Also can be due to trauma to throat, vocal abuse, toxic exposure, GI complications, smoking, allergy
Differential Diagnosis of Hoarseness Acute Hoarseness/Acute Laryngitis Hoarseness Cough Sore throat Fever Vesicles on soft palate Lymphadenopathy
Evaluation of Hoarseness History is paramount Projection - tired, breathy and low volume Quality - ”hoarse”, “gruff”, “raspy” Range - high, middle and low
Evaluation of Hoarseness Physical Exam Speaking voice Range profile Fundamental Frequency – F0 Maximum Phonation Time Standard Reading Passages Singing if appropriate – local, regional, bodywide Voice Lab – Acoustics and Aerodynamics
Evaluation of Hoarseness Endoscopic exam – mirror, flexible endoscope, rigid endoscope Digital archiving essential for documentation
Evaluation of Hoarseness Studies CT scan – evaluation of course of RLN EMG – Is there an nerve to muscle problem? Double pH probe – What is the severity of Laryngopharyngeal reflux (LPR)? Microlaryngoscopy – some lesions missed in the office.
Evaluation of Hoarseness Studies – the future…. Aerodynamics and acoustics – Chaos theory and mathematical modeling Vocal cord motion – gross arytenoid motion being evaluated endoscopically Vocal cord pliability – endoscopic rheometers and vocal fold oscillators Ocular Coherence Tomography/Ultrasound
Laryngeal EMG Myopathy – normal frequency of firing but decreased amplitude Neuropathy – decreased frequency but occasional normal amplitudes Polyphasic reinnervation potentials indicate some loss of function but reinnervation has begun
Glottal Incompetence A “Leaky Valve” pure and simple Loss of total vocal fold volume Loss of pliable layer from use and scar Most often a function of age Temporary Injectables – fat and collagen Permanent – Gore-tex, silastic etc.
Cricoarytenoid Joint Dysmobility Intubation, rheumatoid, osteoarthritis Limit range of movement Can’t open or close Voice and airway Medical therapy if appropriate Surgery - move or remove arytenoid
Hyperfunction – a.k.a. MTD Overactivity of supraglottal musculature Compresses and alters the airstream Often normal glottic function Inciting events can be ANYTHING Voice therapy is used to get the voice “back on track”
Vocal Cord Papilloma Most common benign tumor of vcs Pediatric and adult forms Voice and airway Surgery - mechanical or laser debulking Anti-virals in children High risk of permanent dysphonia 585nm Pulsed Dye Laser – Treatment can now be done in the office!!!
Vocal Cord Keratosis with Atypia Smoking and alcohol Repetitive chemical insult to vocal folds Dysplasia into cancer Closure, pliability and symmetry Radiation therapy - not recommended Phonomicrosurgery Pulsed Dye Laser - Treatment can now be done in the office!!!
Vocal Cord Cancer Smoking and Drinking are synergistic U.S. - 2/3 glottic, Europe 2/3 supraglottic Hoarseness Closure pliability and symmetry Voice and airway Radiation Ultra-narrow margin surgery Endoscopic approach for early cancers – increasing evidence for late cancer also
Vocal Cord Nodules Vocal overuse Repetitive microtrauma to mid vocal folds Closure and pliability Reduce demands Voice therapy Surgery – Surgeons much less likely than previously to operate unless firm
Vocal Cord Polyp Vocal overuse Repetitive microtrauma to mid vocal folds Closure and pliability Reduce demands Voice therapy Surgery – Instrumentation and even robotics being applied to improve precision and safety
Vocal Fold Scar Forms at the junction of epithelium and golden layer (SLP) Decreases the pliability of the membrane Decreases the closure and therefore the efficiency Fatigue and projection problems are common LOSS OF UPPER REGISTER!!!