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104 Cards in this Set
- Front
- Back
The lungs, in conjunction with the circulatory system, deliver ______ to and expel _____ ______ from the cells of the body.
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oxygen; carbon dioxide
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The upper respiratory system...
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warms and filters air.
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The lungs accomplish _____ ______
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gas exchange
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What are the structures of the upper respiratory system? 487-488
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Nose
Sinuses and nasal passages Pharynx Tonsils and adenoids Larynx: epiglottis, glottis, vocal cords, and cartilages Trachea |
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The purpose of the cilia is ?
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move the mucus back to the larynx.
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Paranasal sinuses? and purpose?
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frontal, ethmoid, sphenoid, maxillary
Purpose a resonating chamber in speech. |
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Lower respiratory structures?
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Lungs
Pleura Mediastinum Lobes of the lungs: Left: upper and lower Right: upper, middle, and lower Bronchi and bronchioles Alveoli |
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When does inspiration occur? Expiration occurs?
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I= during the first two/thirds of the respiratory cycle.
E= during the last two thirds. |
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Inspiratory phase requires ____ but expiratory requires very little
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energy.
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Exception: In COPD expiration requires _______
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energy.
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Alveoli
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where gas exchange takes place.
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How many alveoli are there?
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300 million in clusters of 15 to 20.
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What are the three types of alveoli?
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Type 1- epithelial cells that form the alveolar walls.
Type 2- excrete surfactant (a phospholipid that prevents collapse) Type 3- large phagocytic cells that ingest foreign matter and act as a defense mechanism. |
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Thoracic cavity is an ____ chamber. The base of this chamber is the ____.
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airtight; diaphragm
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Inspiration
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contraction of the diaphragm and external costal muscles increases the space in the chamber.
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Expiration
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with relaxation, the diaphragm moves up and intrathoracic pressure increases. This increased pressure pushes air out of the lungs. Expiration requires the elastic recoil of the lungs.
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Function of the respiratory system.
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oxygen transport, respiration, ventilation and gas exchange.
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Respiration
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The process of gas exchange between atmospheric air and the blood at the alveoli, and between the blood cells and the cells of the body.
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Why does exchange of gas occur?
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Exchange of gases occurs because of differences in partial pressures.
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Oxygen diffuses from the ____ into the ____ at the alveoli to be removed form the body.
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air into blood
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Carbon dioxide diffuses from the ____ into the ____ at the alveoli to be removed form the body.
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blood into air
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What is ventilation?
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Ventilation is the movement of air in and out of the lungs.
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Air must reach the _____ to be available for gas exchange.
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alveoli
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What is (pulmonary) perfusion?
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Perfusion is the filling of the pulmonary capillaries with blood.
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Adequate gas exchange depends upon what?
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Adequate gas exchange depends upon an adequate V/Q ratio, a match of ventilation and perfusion.
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When does shunting occur?
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Shunting occurs when there is an imbalance of ventilation and perfusion. This results in hypoxia (oxygen deprivation).
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What is gas exchange between the lungs and blood and between the blood and tissues?
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Respiration.
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Normal breath sounds
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Vesicular
Bronchovesicular Bronchial |
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Abnormal breath sounds
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Crackles
Wheezes Friction rubs |
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tidal volume
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air volume of each breathe (in and ex) during normal breathing.
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inspiratory reserve volume
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maximum volume that can be inhaled after a normal inhalation.
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expiratory reserve volume
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maximum volume that can be inhaled after a normal exhalation
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vital capacity
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the maximum volume of air exhaled from a maximal inspiration, VC = TV + IRV + ERV.
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forced expiratory volume
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volume exhaled forcefully over time in seconds. Time is indicated as a subscript, usually 1 second.
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a spirometer measures
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volumes of air exhaled and is used to assess lung capacities.
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When assessing TV, measure ____ breaths. TV varies from breath to breath.
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several
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Peak flow rate reflects ___ ___ ____ and is frequently done by patients using a home spirometer.
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maximal expiratory flow
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Inspiratory force measures
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the effort of the patient in making an inspiration.
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Monometer measures and occludes what?
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A monometer which measures inspiratory effort can be attached to a mask or endotracheal tube to occlude the airway and measure pressure.
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Normal inspiratory pressure is approximately ______
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100 cm H2O.
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Inspiratory Force of less than ____ usually requires mechanical ventilation.
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25 cm
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ABG
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Measurement of arterial oxygenation and carbon dioxide levels.
Used to assess the adequacy of alveolar ventilation and the ability of the lungs to provide oxygen and remove carbon dioxide. Also assesses acid base balance |
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Pulse Ox
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oxygen saturation in the blood.
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Pulse Ox does not replace ______
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abg and may be unreliable
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bronchoscopy
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direct examination or larynx, trachea, and bronchi. Fiberoptic ("bendy" tube )and rigid (straight tube) bronchoscopy
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bronchophony
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abnormal increase in clarity of transmitted voice sounds.
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compliance also known as
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dispensability... is the elasticity and expandability of the lungs and thoracic structures
measure of force required to expand or inflate the lungs. |
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Diffusion is the...
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process by which oxygen and carbon dioxide are exchanged at the air-blood interface. high to low
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Pulmonary perfusion
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actual blood flow through the pulmonary circulation.
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the pulmonary circulation is considered _____ pressure because...
It can vary its ______ |
systolic is 20-30 and dia is 5 to 15.
circulation |
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Adequate gas exchange depends on
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adequate V/Q
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V/Q ratio
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ventilation-perfusion ratio
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ventilation-perfusion ratio imbalances because of
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inadequate ventilation, perfusion or both
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The air we breathe is a mixture of
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nitrogen (78.6%) oxygen (20.8%) ...with traces of carbon dioxide (0.04) and water vapor (0.05), helium and argon
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Atmospheric air pressure at sea level is 760mm
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true
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Partial pressure is pressure...
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exerted by each type of gas in a mixture of gases.
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Partial pressure is ________ to the concentration of that gas.
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proportional
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the total pressure is equal to
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the sum of partial pressures. no matter if its atmospheric or in the lungs.
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When a gas is exposed to a liquid, the gas _______ until an _____ is reach
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dissolves; equilibrium
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oxygen and carbon dioxide are transported simultaneously either _____ in blood or combined with hemoglobin in red blood cells.
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dissolved
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The Oxhemoglobin Dissociation Curve shows the relationship between
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partial pressure of oxygen and the percentage of saturation of oxygen.
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At the same time oxygen diffuses from the ___ to the ______, carbon dioxide diffuses from _____ to the to blood and transported to the lungs for excretion.
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oxygen- blood into tissue
carbon dioxide- tissue into blood |
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____ ______ is the result of cyclic excitation of the respiratory muscles by the phrenix nerve
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resting respiration
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lungs and respiratory peak is between
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20 and 25 and decreases afterwards.
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Clubbing of the fingers is a sign of...
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lung disease
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Cyanosis
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is a VERY LATE indication of hypoxia. It appears when there is at least 5g/dL of unoxygenated hemoglobin.
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4 reasons the chest may not have a 1:2 ratio
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barrel chest- over inflation of the lungs
funnel chest- p. excavatum Pigeon chest- p. carinatum kyphoscoliosis |
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eupnea
apnea cheyne-stokes biot's respiration |
normal breathing 12-18
period of cessation of breathing regular cycle where rate and depth of breathing increase then decrease until apnea occurs. periods of normal breathing followed by varying apneas |
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Bronchophony and egophony are indicative of
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consolidation ie pneumonia or pleural effusion
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vesicular
bv and tracheal bronchial |
I>E, soft, low
I=E intermediate (Bv) I<E loud, tracheal, very loud |
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crackles
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soft, high pitched popping sounds during inspiration
course crackles- early inspiration fine crackles- late inspiration |
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wheezes
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musical sounds can be heard on inspiration but usually expiration
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rhonchi
friction rub |
low pitched wheezing rumbling sounds
leather rubbing together, crackling |
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How is vital capacity measured?
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by having the pt take in max breath and exhale fully through a spirometer.
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Throracoscopy (endoscopic)
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evaulation of pleural effusions, pleural disease and tumors.
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Thoracentesis
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aspiration of fluid or air from the pleural space.
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Examples of upper respiratory diseases
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Infections
Rhinitis Sinusitis: acute, chronic Pharyngitis: acute, chronic Tonsillitis, adenoiditis Peritonisillar abscess (aka quinsy) Laryngitis |
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rhinitis
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inflammation of the mucous membranes of the nose.
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rhinosinusitus
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inflammation of the nares and paranasal sinuses, including frontal, ethmoid, maxillary,a nd sphenoid sinuses. thick mucous occludes sinsus cavity; prevents drainage
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pharyngitis
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inflammation of the throat; usually viral or bacterial in origin.
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potential complications of upper respiratory
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sepsis- bacterial infection
meningitis- brain and spinal cord inflammation peri tonsuilar abscess otitis media- middle ear infection sinusitis |
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S/S of upper respiratory
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hoarness, chest pain etc
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palpate _______ ______ _____ when assessing for an upper respiratory tract infection.
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neck lymph nodes
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use ___ for sore throat.
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gargles
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epistaxis, most common site
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bleeding from the nose; anterior septum
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how to treat epistaxis
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direct pressure 5-10 min with head titled forward.
nasal decongestants topical vasoconstrictors ie (cocaine etc.) |
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packing to control bleeding from posterior nose
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catheter, packing, strip
can use a ballon catheter |
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If bleeding doesn't stop in 15 min. seek medical attentino.
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true
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reasons nasal airways may be obstructed
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deviation of nasal septum, hypertrophy of turbinate bones, pressure of nasal polyps.
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larynx (voice box) obstruction is usually due to ______
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edema.
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______ is characterized by episodes of life threatening laryngeal edema
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Hereditary angioedema (HAE)
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Categories of cancer of larynx
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Supraglottic: false vocal cords above vocal cords
Glottic: true vocal cords Subglottic: below vocal cords |
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S/S of cancer of the larynx
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hoarse, cough, sore throat, lump in neck
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affected voice sounds
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Medical treatment of larynx cancer
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radiation, chemo, surgery (Partial laryngectomy
Supraglottic laryngectomy Hemilaryngectomy Total laryngectomy) |
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laryngitis
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inflammation of the larynx as a result of dust, chemicals, smoke, and other pollutants or as part of a URI.
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aphonia
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complete loss of voice, a sign of laryngitis. also severe cough.
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how to manage laryngitis
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rest voice, avoid irritants, and inhale cool steam or aerosol.
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signs of peritonsilar abscess
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trismus (unable to open mouth), sore throat, drooling
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vocal cord stripping
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used to treat dysplasia, hyperkeratosis (thickening if the stratum corneum), and leukoplakia.
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cordectomy
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exicision of the vocal cord, performed via transoral laser
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when is an electric larynx used?
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When esophageal speech is not successful or until the patient maters the technique.
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how to maintain a patent airway.
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fowler's or semi fowlers position to decrease edema
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Keep HOB elevated during, after tube feedings
Check gastric residual when administering tube feedings When patient begins oral feeding, maintain upright bed position during, after feedings Swallowing maneuvers to prevent aspiration Use of thickened liquids |