CD 663 Swallowing Flashcards
Three aspects of the eating act that we, would constitute dysphagia.
- problems in the mouth; getting the food ready to be swallowed.
- problems in the act of actually swallowing -difficulty after the food is swallowed but is still in transit to lower locations in the digestive tract.
What controls the oral stage of swallowing?
Medial temporal lobe control
Oral Phase is a ___________ activity but it is overly _____________ therefore; not neccessarily a ____________ activity.
voluntary routinized consious
How do we use our sense when eating?
Visual
Olfactory
Auditory (food prep, pouring of liquids)
Kinesthetic (Sensation of lip and food item touching, the feel of the bolus)
Describe different preparation of food materials: Liquid
tongue cups around the bolus
Describe different preparation of food materials: puree
tongue manipulates and holds bolus (no signal to masticate, shred, grind)
Describe different preparation of food materials: solid
body gets signal to prepare to chew!
Process of mastication in an adult
- Upper/lower teeth crush bolus 2. Rotary/lateral movement of the jaw to manipulate bolus 3. Saliva mixed with bolus by tongue and by chewing 4. Posterior aspect of oral cavity is closed 5. Anterior aspect of oral cavity is closed by lips
What is Larynx doing dueint the oral prepatory stage?
resting.
Oral stage duration
1-1.5 seconds (.3 seconds longer for persons over 60)
Steps in oral stage
- Tongue tip and sides are elevated 2. Tongue sequentially presses bolus to the hard palate, front to back. 3. Tongue pressure increases with increase in viscosity 4. arynx begins to elevate
When does the pharyngeal phase begin?
When bolus passes by the ramus of the mandible
When does oral transit start?
when the tongue begins to propel bolus posteriorly alonghard palate.
Other Structures in oral cavity that can pocket material
-Labial sulcus -Buccal sulcus -Faucial arches/pillars
Why is sensory information imporant to the swallowing process?
act as feedback mechanisms
What triggers the swallowing reflex?
sensory input
When the pharyngeal phase begins, what 3 things are concomitantly inhibited.
-chewing -breathing -vomiting
Where is the swallow center located in the brain?
medulla
Swallowing reflex can take place (triggered) from stimulation to the:
-Velum -Posterior aspect of the pharynx -The weight of the bolus
Bolus stimulates superficial and deep sensory receptors, many of which project via IX, X, and XI to a medullary reticular formation called the ________________.
nucleus tractus solitarius (NTS)
Events of the pharyngeal stage:
- Begins as the bolus passes the ramus of the mandible 2. Anterior and superior displacement of the hyolaryngeal complex 3. Closure of the false vocal and true vocal folds 4. Progressive pharyngeal contraction 5. Opening of UES
Lateral Channels:
passage alongside and outside of the main laryngeal structures, bypassing laterally the opening into airway
Pyriform Sinuses
Inferior and posterior to valleculae.
When does velopharyngeal closure happen?
end of oral phase
Why does velopharyngeal closure happen?
to keep bolus from moving superiorly
The Pharyngeal Transit Stage of the pharyngeal stage:
The bolus moves inferiorly via a combination of gravity, base of tongue retraction, pharyngeal wall contraction, and pressure differentials
Peristalsis
refer to constriction that is rhythmic and repetitive -pharyngeal stage is not peristalsis
What do the constrictors do?
decrease diameter in sequential way to move bolus inferiorly
What do BOT retraction and pharyngeal wall contraction help to establish?
changes in pressure which facilitates bolus movement.
Four Mechanisms of Airway Protection
1.Hyoid/laryngeal elevation away from path of bolus 2. Best airway protection: movement of the Epiglottis 3. . Adduction of the true vocal chords 4. Closure of the laryngeal vestibule:
What is the best airway protection mechanism?
epiglottic inversion
Describe Closure of the laryngeal vestibule
- Anterior tilting of arytenoids 2. FVF adduction 3. Expelling penetrated material
Describe the opening of the UES (or cricopharyngeus) (in summation)
- UES relaxes during the swallow (crucial) 2. Elevation of the larynx pulls UES/PES open 3. Duration of opening increases as bolus volume increases 4. Contraction of pharynx also contributes to opening
Duration of esophageal phase
8-12 seconds
Esophageal Stage
- PES/UES already opened 2. bolus is carried to stomach via gravity and esophageal peristalsis 3. LES must open and then close after bolus 4. Esophagus joins stomach through an opening in diaphragm called diaphragmatic or esophageal hiatus.
Problems at esophageal stage
difficulty opening and closing these sphincters the lack of peristalsis food material can travel in the wrong direction
Premature spillage into valleculae: when is it normal?
Considered normal as long as pharyngeal phase is triggered as TAIL of bolus is leaving ramus of mandible
General differences in elderly during swallowing
Overall slower Reduced sensory information Changes in structure (normal for aging)
Purpose of a clinical swallow assessment
- Determine as much as possible the physiologic factors contributing to the dysphagia 2. Stage of impairment 3. Make determination for the need for other tests 4. Make recommendations for safest means of intake, including diet (PO Substances)
Left sided vs right sided CVA-Who is more likely to have dysphagia?
LCVA
Why would you be concerned about dyphagia in someone who had a brainstem lesion?
may affect swllowing center
Why be concerned about dysphagia in a TBI patient?
- Changes in cognition may affect ability to eat safely (decisions pt makes while eating) 2. Sensory and motor impairments
Anytime you have delayed pharyngeal swallow or piecemeal deglutition, you can be concerned about ____________________.
Silent aspiration.
Common swallowing deficits found in Parkinson’s patients?
- Impaired lingual movement 2. minimal jaw opening while eating 3. abnormal head and neck posture 4. impulsive eating behavior 5. delayed oral transit time (tongue pumping and piecemeal deglutition) 6. Pooling in valleculae and pyriform sinuses 7. Silent aspiration
Swallowing Characteristics of an individual with MS.
- spasticity and incoordination of the oropharyngeal and respiratory muscles 2. inefficient oral transit 3. difficulty coordinating with respiration 4. delay and incoordination of laryngeal movements 5. pharyngeal constrictor dysmotility
Swallowing Chacteristics of an individual with Huntington’s Disease.
- too much swallowing 2. initiated too early 3. overall pattern of lack of control and coordination of swallowing structures
Swallowing Chaacteristics of persons with ALS.
- difficulty with lingual movement in the early stages 2. difficulties in control of velum=premature spillage in early stage and hypernasality
What populations are swallowing exercises contraindicated?
ALS Myasthenia Gravis
Dysphagia symptoms of dementia:
- Sensory impairments 2. lack of awareness
What is Guilliane Bare Syndrome?
Acute onset disease of the peripheral nerves affects gross motor movement and muscles of respiration, etc.
Dysphagia symptoms in individuals with Guillian Barre?
- rapid onset of weakness/paralysis in muscles of the tongue and pharynx (and other body parts) 2. abnormal sensation including lack of sensory input 3. report a tingling feeling
Dysphagia symtoms in people with Myasthenia Gravis:
progressive fatigue
What is Myasthenia Gravis?
disease that affects how nerve impulses are transmitted to the muscle at the neuromuscular junction
Which common meds affect swallowing?
Sedatives and anti-seizure meds
Which common meds affect saliva production?
Tricyclic antidepressants and antihistamines
Dyspnea
difficulty breathing
Tachypnea
rapid breathing exceeding 20 bpm
Normal adult BPM?
12
Persons with restrictive pulmonary diagnosis (reduces ability of respiratory apparatus to expand) are more at risk for aspiration/penetration because……
more likely to inspire immediately after the swallow
What is COPD (not what it stands for…)?
Increased resistance of airflow through the pulmonary airway with the resistance being greater during expiration than on inspiration
What are restrictive diseases? (definition)
Typically progressive diseases that make it difficult for the lungs to expand to get enough of the gas in the lungs for the gas exchange
Esophageal Motility Disorders of Swallowing
Zenker’s Diverticulum Strictures/constrictions GERD Tracheoesophageal Fistula Diffuse Esophageal Spasms (DES) Achalasia
failure of the lower esophageal sphincter (LES) to relax, or relaxation is incomplete, preventing passage of the bolus into the stomach
Achalasia
Simultaneous prolonged contraction of two (2) parts of the esophagus rather than the normal top to bottom sequential contractions
Diffuse Esophageal Spasms (DES)
outpouching or pocket that forms in the pharyngeal wall just superior to the UES/PES, within the UES/PES or just below the UES (upper part of the esophagus)
Zenker’s Diverticulum
A fistula (hole) develops between the soft tissue common wall of the trachea and esophagus
Tracheoesophageal Fistula
often the result of formation of fibrotic tissue that can develop after prolonged irritation/inflammation of the esophagus (esophagitis) secondary to GERD
Strictures/constrictions
First step in clinical bedside swallow eval?
check for doctors order