Rehabilitation of voice after total laryngectomy. Ms ent university exam patterns for 10 marks.

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Voice Rehabilitation After Total Laryngectomy

MS ENT University Exam - 10 Marks Answer

INTRODUCTION

Total laryngectomy (TL) results in permanent separation of the upper and lower airways. The patient breathes through a tracheostoma and completely loses the natural voice. The primary goal of post-laryngectomy rehabilitation is to restore functional alaryngeal communication. Three main options are available:

Tracheoesophageal (TE) voice / TEP with voice prosthesis - Gold Standard
Esophageal (oesophageal) voice
Electrolarynx (artificial/electronic larynx)

PHYSIOLOGY OF ALARYNGEAL SPEECH

Normal speech requires three components (Cummings, Fig. 111.3):

Bellows - pulmonary airflow
Sound generator - vibrating vocal folds (larynx)
Resonator/articulator - vocal tract (mouth, pharynx, nose)

After TL, the vocal tract is largely unchanged. The larynx is replaced by the pharyngoesophageal (PE) segment as the new substitute sound generator. The PE segment mucosa must now be set into vibration to produce sound, which the articulator converts into intelligible speech.

METHOD 1: TRACHEOESOPHAGEAL PUNCTURE (TEP) WITH VOICE PROSTHESIS - GOLD STANDARD

Principle

Pulmonary air - the most powerful available air source - is redirected through a surgically created fistula between the trachea and esophagus into the PE segment, causing mucosal vibration and producing voice. A one-way valve prosthesis prevents aspiration of food/liquids from esophagus into trachea.

History

First described by Singer and Blom in 1980
Devices developed since: Blom-Singer, Panje, Groningen, Provox, VoiceMaster prostheses

Surgical Procedure - TEP Creation

Primary TEP - created at the time of laryngectomy (if no wound-healing problems are anticipated)

Secondary TEP - created 4-6 weeks post-laryngectomy as an outpatient procedure. This is the preferred approach of many surgeons, as it allows pharyngeal reconstruction to heal before additional surgical wounding.

Technique (secondary, outpatient):

Flexible esophagoscope is passed to identify the posterior tracheal wall
A needle is inserted ~1.5 cm inferior to the posterior stomal rim under endoscopic vision
The needle enters the esophageal lumen and is confirmed visually
A guidewire is passed; the tract is dilated
A voice prosthesis (or red rubber catheter) is inserted to maintain the tract

Important adjunct: Cricopharyngeal myotomy should be performed at the time of laryngectomy to prevent cricopharyngeal spasm, which would impair sound production.

Voice Prosthesis - Types

Type	Characteristic
Patient-inserted (non-indwelling)	e.g., Blom-Singer Classic; changed by patient; lower cost
Clinician-inserted (indwelling)	e.g., Provox Vega; changed every 3-6 months by clinician; preferred for elderly/manual dexterity issues

Both types are one-way valves: open for pulmonary air into esophagus during speech; close during swallowing to prevent aspiration.

How to Speak with TEP

Patient occludes the stoma with a thumb (digital occlusion) or uses a hands-free heat-and-moisture exchanger (HME) valve
Exhales, redirecting pulmonary air through the prosthesis into the esophagus
PE segment mucosa vibrates, producing sound
Articulation by lips, tongue, teeth converts sound into speech

Advantages

Best voice quality - most natural sounding
Long phonation time (uses full pulmonary air reserve)
Rapid acquisition - functional voice can be achieved on the day of insertion
High success rate (~80-90%)
Hands-free options available (tracheosomal valves)

Disadvantages / Complications

Requires surgical procedure
Prosthesis needs periodic replacement (average 3-12 months)
Complications include: periprosthetic/central leakage, granulation, tract migration, candida colonization, aspiration
Cost of prosthesis (significant issue in developing countries)
Requires motivated patient and an experienced speech-language pathologist (SLP)

METHOD 2: ESOPHAGEAL VOICE (OESOPHAGEAL SPEECH)

Principle

Air is trapped and injected into the esophagus/pharynx by the patient using one of two techniques:

Injection method - tongue/lip pressure forces air into esophagus
Inhalation/suction method - negative intrathoracic pressure draws air into esophagus

The air is then expelled in a controlled manner, causing vibration of the PE segment mucosa, producing a sound source for speech.

Characteristics

Phonation time: Very short - only 1-2 seconds (limited air volume: 60-80 mL vs. liters of pulmonary air)
Training required: Months to 1 year of intensive speech therapy
Success rate: Only 40-60% acquire reasonable speech; only ~10% achieve good voice

Advantages

No devices, prostheses, or implants needed
No maintenance costs
No surgical risk

Disadvantages

Short phonation time, low pitch, limited loudness
Difficult and time-consuming to learn
Low success rate
Staccato quality - short phrases only
Not commonly used as primary method anymore

METHOD 3: ELECTROLARYNX (ARTIFICIAL / ELECTRONIC LARYNX)

Principle

An external battery-powered device generates mechanical vibrations. These vibrations are transmitted through skin/tissues to the pharynx (transcervical placement) or through an intraoral tube directly into the oral cavity. The vocal tract then articulates this mechanical sound into speech.

Types

Transcervical (neck-type): Placed against the neck/submandibular region; most common; requires adequate tissue for sound transmission
Intraoral: A tube transmits sound directly into the mouth; useful when neck tissue is fibrotic, irradiated, or when transcervical use is not tolerated

Timing of Use

The electrolarynx is particularly valuable in the immediate postoperative period - it can be used while the patient is recovering from laryngectomy, while awaiting TEP placement or learning esophageal voice. Some patients use it as a long-term primary communication method.

Advantages

Rapidly acquired - most patients can use it with minimal training
Reliable and always available
Useful as a backup when primary speech method fails
No surgical risk

Disadvantages

Robotic/mechanical sound quality - not natural
Requires a hand to hold the device (unless intraoral type)
Background noise interferes with transmission
Device malfunction/battery failure
Social stigma for some patients

COMPARATIVE SUMMARY TABLE

Parameter	TEP Voice Prosthesis	Esophageal Speech	Electrolarynx
Voice quality	Best / most natural	Moderate	Robotic/mechanical
Acquisition	Rapid (same day)	Months-1 year	Very rapid
Success rate	~80-90%	40-60%	~90%
Phonation time	Long (pulmonary)	Very short (1-2 sec)	Continuous
Device required	Yes (prosthesis)	No	Yes (electrolarynx)
Surgery needed	Yes (TEP)	No	No
Cost	High	Nil	Moderate
Gold standard	YES	No	No

ADDITIONAL REHABILITATION ASPECTS

Pulmonary Rehabilitation

After TL, the upper respiratory tract is bypassed, so air reaching the lungs is no longer warmed, humidified, or filtered. A Heat and Moisture Exchanger (HME) is placed over the stoma to partially compensate for this, improve pulmonary hygiene, reduce tracheal crusting, and improve voice quality.

Olfaction Rehabilitation

Loss of nasal airflow after TL causes near-total loss of smell (and taste). The Nasal Airflow-Inducing Maneuver (NAIM) - also called the "polite yawning technique" - can restore olfaction in the vast majority of TL patients.

Stomal Care

Prevent stomal stenosis and stomal trauma
Tracheal stoma buttons/filters protect the stoma and aid humidification
Tracheal stomal prosthetics can be used with or without TE voice prostheses

Role of the Speech-Language Pathologist (SLP)

Pre-operative counseling and patient selection
Teaching of preferred alaryngeal speech method
Long-term follow-up and prosthesis management
Management of cricopharyngeal spasm (botulinum toxin injection may help fluency of TE voice)

KEY POINTS TO REMEMBER FOR EXAM

Gold standard = TEP with voice prosthesis (tracheoesophageal puncture)
First described by Singer and Blom (1980) - "Blom-Singer prosthesis"
PE segment = new substitute sound generator after TL
Cricopharyngeal myotomy at laryngectomy facilitates TE voice
Esophageal voice uses only 60-80 mL air; short phonation 1-2 seconds
Electrolarynx = best for immediate post-op period and as backup
HME = heat and moisture exchanger for pulmonary rehabilitation
NAIM = for restoration of olfaction after TL

Sources: Cummings Otolaryngology Head and Neck Surgery (7th Ed.) - Chapter 103 (Laryngopharyngectomy Reconstruction) and Chapter 111 (Alaryngeal Voice and Speech Rehabilitation)

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