Before explaining the disorder of swallowing, it is important
to understand the basic anatomy and the process of a normal
swallow. Usually the lips and tongue hold food and aid in pushing
it to the back of the mouth. The soft palate pushes down on
the back
of the tongue to help form the food into a bolus while the hyoid
bone elevates and moves forward. This movement, along with the
contraction of several muscles, allows the food to pass over
the epiglottis which covers the airway. The bolus and food then
move past the covered
| Symptoms
include inability to hold food in the mouth, difficulty
moving food from the front to the back of the mouth, or
"pocketing" of food particles in the mouth after the swallow. |
larynx
(voice box) and into the pharynx (back throat). Dysphagia is
any abnormality occurring during this process. It can occur
due to a stroke, Parkinson's disease, Lou Gehrig's disease,
or any other condition affecting the neuromuscular structures
in the head and neck. Because the structures involved in breathing
and swallowing are in such close proximity, ingestion of food
particles into the airway is a major concern. The most severe
cases of dysphagia can lead to aspiration pneumonia due to bacteria
in the lungs from an abnormal swallow. It is not uncommon for
aspiration pneumonia to lead to death.
HOW
WILL I KNOW THERE'S A PROBLEM?
Symptoms
include inability to hold food in the mouth, difficulty moving
food from the front to the back of the mouth, or "pocketing"
of food particles in the mouth after the swallow. Some patients
may feel like food is "stuck" in the throat, have pain during
swallowing, cough before, after, or during the swallow, or
demonstrate esophageal reflux. If any of these signs occur,
a dysphagia evaluation is recommended to ensure safe nutritional
intake. In the event that a person is hospitalized after a
stroke, the physician may request a speech therapist from
the Center for Speech, Language and Occupational Therapy,
Inc. to evaluate swallow safety before discharge. Not all
symptoms present themselves immediately after an accident.
However, if they arise as the patient's condition changes,
an outpatient evaluation can easily be performed.
WHAT
HAPPENS NEXT?
A
complete diagnostic evaluation is the first step in developing
a safe and effective therapy plan. Initially an extensive
bedside exam is performed to assess the musculature of the
lips, cheeks, and tongue. The coordination and range of motion
in these structures dictates the safest diet to ingest. If
problems are suspected after the food has left the oral cavity,
a Modified Barium Swallow (MBS) test is commonly recommended.
This X-Ray exam involves eating food or liquid that contains
barium, which "highlights" the food and allows it to be seen
on the X-Ray as it travels from the mouth to the stomach.
This test is essential for determining whether or not an individual
is aspirating or passing food particles into the airway. It
also allows speech therapists to pinpoint the location of
breakdown and identify the affected muscles and nerves, as
well as clearly define the type of therapy most beneficial
to the patient. Therapy can be a combination of strengthening
muscle range and coordination, increasing sensitivity to the
presence of food, diet manipulation, and patient education
and training. Each speech therapist has a unique approach
to addressing these issues, but diet manipulation uses standard
categories to establish appropriate food consistency. Broken
into three basic levels, food diets are referred to as puree,
mechanical soft, or regular. Puree diets may include applesauce,
pudding, or anything that can be blended into that consistency.
This diet is considered the easiest to ingest because it requires
minimal chewing or bolus formation. Mechanical soft diets
contain items of a "mashed potato" consistency which are often
put in gravy to lubricate the swallow. These diets are recommended
for patients with more muscle coordination and control than
those on a puree diet. A regular diet indicates that a patient
can safely manipulate any solid consistency, but does not
mean that dysphagia is not present. Swallowing difficulties
may occur with liquids alone, or in combination with solids.
Liquid consistencies are divided based on thickness, and are
categorized as thin, nectar thick, or honey thick. Water is
the guide used for "thin", and moves quickly through the mouth
to the stomach. A patient who is slow in covering the airway
during the swallow may be restricted from thin liquids in
order to reduce the risk of aspiration. Nectar thick consistency
is that of apricot nectar. Honey thick liquids resemble honey,
and move slowest through the oral cavity. The slower a liquid
moves, the more time a patient has to prepare for each stage
of the swallow and reduce risk of aspiration. By adding a
powdered substance known as "Thick It" to liquid, any consistency
can be established. For patients requiring diet modification
after a hospital stay, "Thick It" can be purchased over the
counter and added to foods as needed.
For
individuals who aspirate on the Modified Barium Swallow (MBS)
exam, eating is not safe. These patients are given nothing
by mouth. Medical professionals on the patient's rehabilitation
team discuss alternative methods of feeding and choose one
of two nutrition options. Nutrition can be passed through
a nasogastric tube or a PEG tube. A nasogastric tube is placed
in the nostril, through the nasal cavity and along the back
of the throat until it enters the pharynx, bypassing the swallowing
mechanism. It is a temporary solution that provides nutrition
until the patient's status has improved to an independent
swallow. A PEG tube is surgically placed in the small intestine
and food is passed through it directly into the stomach. It
is considered a less temporary method of feeding.
WHAT
CAN I DO TO HELP?
The
most important thing friends and family can do to help individuals
with dysphagia is support them. Go to therapy sessions and
learn how to prepare safe foods for your loved ones. Encourage
them to stay educated and respect the risks involved when
eating is unsafe.
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