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Pulmonary System Anatomy and Physiology
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RESPIRATORY SYSTEM MUST WORK CONTINOUSLY OR DEATH WILL OCCUR
HOW MUCH O2 DO WE HAVE? FOUR TO SIX MINUTES SUPPLY
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RESPIRATORY SYSTEM NOSE PHARYNX LARYNX TRACHEA BRONCHI ALVEOLI LUNGS
DIAPHRAM
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Nasal Cavity Nostrils also known as anterior nares
Beginning of respiratory tract Warms the air Filters the air Moistens the air
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NASAL SEPTUM PARTITION OR WALL
CARTILAGE DIVIDES THE NOSE INTO HOLLOW SPACES
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CILIA TINY HAIRLIKE STRUCTURES IN NASAL CAVITY TRAPS DIRT
TRAPS PATHOGENS TRAPPED PARTICLES PUSHED TOWARD ESOPHAGUS SWALLOWED
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Sinuses Hollow cavities
Short ducts connect the sinuses to the nasal cavity Mucous membrane lines the sinuses to help warm and moisten the air Also give resonance to the voice
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Pharynx Commonly known as the “throat” Subdivided
Nasopharynx Oropharynx Laryngopharynx Both air AND food travel down the pharynx
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Larynx Also know as the “voice box” Contain the vocal cords or folds
Sound occurs when air leaves the lungs, passing through the vocal cords causing them to vibrate
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Larynx Has 9 layers of cartilage
The largest is called the thyroid cartilage or the Adam’s apple
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Epiglottis Flap of cartilage lying behind the tongue and in front of the larynx At rest is upright and allows air to pass through the larynx to the lungs During swallowing it folds back over the larynx to prevent food and liquids from getting into the airway
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Trachea Known as the “windpipe” Passes IN FRONT of the esophagus
Continues down below the larynx Lined with cartilage rings to prevent it from collapsing
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Cilia Also in trachea Smoking is a constant irritation
Smoking kills the cilia Leads to frequent infection and inflammation Triggers cough reflex and results in what we call the “smoker’s cough”
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LUNGS Porous, spongy tissue
Right lung is larger and broader than the left lung It has three lobes This is because the heart lies to the left and needs room Left lung, therefore, only has two lobes
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PLEURA Thin, moist, slippery membrane of tough tissue cells Two layers
Visceral covers just the lung Parietal covers lungs and diaphragm and lines the thoracic cavity Pleural Fluid fills the space between the two pleural membranes
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Bronchi Lower end of trachea separates into the left and right bronchus
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Bronchioles Bronchi subdivide into the bronchioles
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Alveoli About 500 million alveoli in the adult lung
This is 3x the amount needed to sustain life Inner surface are covered with a lipid substance called SURFACTANT Prevents alveoli from collapsing
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Alveoli Site of gas exchange
Covered with a network of blood capillaries Oxygen brought into the lungs flows into the capillaries Carbon dioxide created in the body flows out of the capillaries and is exhaled
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Process of Breathing VENTILATION
Mechanical process known as “breathing” Two phases called Inspiration and Expiration
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Ventilation Inspiration Diaphragm contracts (moves downward)
Intercostal muscles contract (pull ribs outward) Creates positive pressure and therefore air rushes into the lungs
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Ventilation Expiration
Diaphragm and intercostal muscles relax (return to resting state) Returns to negative pressure state Air is forced out of the lungs
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Fun Facts Hiccups Sneezing Yawning
Caused by a spasm of the diaphragm believed to be the result of an irritation Sneezing Air rushes out of your nose at a rate of 100 miles per second Some people have a “photic reflex” which makes them sneeze in response to a sudden, bright light Yawning A deep, prolonged breath believed to be caused by the need to increase oxygen in the blood
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Respiration Chemical process where oxygen (O2) and carbon dioxide (CO2) are exchanged There are three types External respiration Internal respiration Cellular respiration
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Cellular Respiration Cells use Cells produce Oxygen (O2)
Nutrients (glucose) Cells produce Energy (ATP) Water (H2O) Carbon dioxide (CO2)
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External Respiration Occurs in the lungs
Between the alveoli and the blood stream Exchange of oxygen (O2) and carbon dioxide (CO2)
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Internal Respiration Occurs in the body
Between the blood stream and tissue cells Exchange of oxygen (O2) and carbon dioxide (CO2)
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Control of the Respiratory Center
Medulla oblongata controls respirations Located in the brain (lowest portion of the brain stem) Increased respirations occur if these things are happen Decreased oxygen (O2) in the blood stream Increased carbon dioxide (CO2) in the blood stream
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DISEASES OF THE RESPIRATORY SYSTEM
ASTHMA
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CAUSATIVE AGENTS SENSITIVITY TO AN ALLERGEN DUST POLLEN ANIMALS FOODS
STRESS OVEREXERTION INFECTIONS
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SYMPTOMS OCCUR BRONCHOSPASMS NARROW OPENING OF BRONCHIOLES
MUCUS PRODUCTION INCREASES EDEMA DEVELOPS IN MUCOSAL LINING
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SYMPTOMS DYSPNEA WHEEZING COUGHING WITH EXPECTORATION OF SPUTUM
TIGHTNESS IN CHEST
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Treatment Bronchodilators (via rescue inhaler or nebulizer)
Anti-inflammatory medications (steroids) Epinephrine O2 Therapy
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PREVENTING ASTHMA ATTACKS
IDENTIFY ALLERGEN ELIMINATE ALLERGEN DESENSITIZATION TO ALLERGENS
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BRONCHITIS INFLAMMATION BRONCHI BRONCHIAL TUBES
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ACUTE BRONCHITIS CAUSED BY INFECTION SYMPTOMS PRODUCTIVE COUGH DYSPNEA
CHEST PAIN FEVER
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TREATMENT ANTIBIOTICS EXPECTORANTS TO REMOVE EXCESSIVE MUCOUS
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CHRONIC BRONCHITIS OCCURS AFTER FREQUENT ATTACKS OF ACUTE BRONCHITIS
LONG-TERM EXPOSURE TO POLLUTANTS OR SMOKING CHARACTERIZED BY CHRONIC INFLAMMATION DAMAGED CILIA ENLARGED MUCOUS GLANDS
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SYMPTOMS EXCESSIVE MUCUS PRODUCTIVE COUGH WHEEZING & DYSPNEA
CHEST PAIN PROLONGED EXPIRATION OF AIR
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TREATMENT NO CURE ANTIBIOTICS BRONCHODILATORS RESPIRATORY THERAPY
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LARYNGITIS INFLAMMATION LARYNX VOCAL CORDS
MAY OCCUR WITH RESPIRATORY INFECTIONS
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SYMPTOMS HOARSENESS LOSS OF VOICE SORE THROAT
DYSPHAGIA: DIFFICULTY IN SWALLOWING
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TREATMENT REST FLUIDS LIMITED USE OF THE VOICE MEDICATIONS
INFECTION IF PRESENT
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INFLUENZA (FLU) CONTAGIOUS VIRAL INFECTION UPPER RESPIRATORY SYSTEM
SUDDEN ONSET Influenza is a viral infection of the respiratory tract that causes coughing, breathing difficulty, fever, headache, muscle aches and weakness. The virus is spread from person to person by inhaling infected droplets from the air.
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SYMPTOMS CHILLS HIGH FEVER COUGH SORE THROAT RUNNY NOSE MUSCLE PAIN
FATIGUE Sometimes people confuse cold and flu, which share some of the same symptoms and typically occur at the same time of the year. However, the two diseases are very different. Most people get a cold several times each year, and the flu only once every several years. People often use the term "stomach flu" to describe a viral illness where vomiting or diarrhea are the main symptoms. This is incorrect, as the stomach symptoms are not caused by the flu virus. Flu infections are primarily respiratory infections.
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TREATMENT BED REST FLUIDS ANALGESICS PAIN FEVER ANTIBIOTICS
NOT EFFECTIVE AGAINST VIRUSES GIVEN TO AVOID SECONDARY INFECTIONS PNEUMONIA
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EPISTAXIS NOSEBLEED CAPILLARIES IN NOSE BECOME CONGESTED AND BLEED
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CAUSES INJURY OR BLOW TO NOSE HYPERTENSION CHRONIC INFECTIONS
ANTICOAGULANT DRUGS BLOOD DISEASES HEMOPHILIA LEUKEMIA A nosebleed may be caused by trauma, irritation or dryness of the lining of the nose, allergic rhinitis, colds, or sinusitis. Other causes can include nasal obstruction such as a deviated septum, or foreign objects in the nose. Most nosebleeds begin on the septum, the midline, vertical cartilage that separates the nasal chambers and is lined with fragile blood vessels. This form of nosebleed is not serious and is usually easy to stop. Seek medical help if the bleeding persists after 15 to 20 minutes of treatment, nosebleeds recur, blood persistently drains down the throat, or a neck or serious head injury is suspected. The nose is a very vascular area of the body that contains many arterioles (tiny blood vessels) that can bleed easily. Nosebleeds occur more frequently in the winter when heated indoor air can dry the membranes of the nose. Also, air moving through the nose can also dry out the membranes and can form crusts. These crusts bleed when irritated by rubbing, picking, or blowing the nose. Occasionally, nosebleeds may indicate other disorders such as bleeding disorders, high blood pressure, or hardening of the arteries.
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TREATMENT COMPRESS NOSTRILS ELEVATE HEAD TILT FORWARD SLIGHTLY
APPLY COLD COMPRESSES NASAL PACKS CAUTERIZE THE BLEEDING VESSEL ELIMINATE UNDERLYING CAUSE
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PNEUMONIA INFLAMMATION INFECTION OF LUNGS
BUILD UP OF EXUDATE IN ALVEOLI CAUSED BY BACTERIA, VIRUS, OR CHEMICALS
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SYMPTOMS CHILLS FEVER CHEST PAIN PRODUCTIVE COUGH DYSPNEA FATIGUE
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TREATMENT BEDREST FLUIDS ANTIBIOTICS IF INDICATED RESPIRATORY THERAPY
PAIN MEDICATION
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RHINITIS (URI) INFLAMMATION OF NASAL MUCOUS MEMBRANE RUNNY NOSE
SORENESS CONGESTION
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COMMON CAUSES INFECTIONS ALLERGENS
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TREATMENT FLUIDS MEDICATION TO RELIEVE CONGESTION
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SINUSITIS (URI) INFLAMMATION OF MUCOUS MEMBRANE LINING SINUSES
CAUSED BY BACTERIA OR VIRUS
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SYMPTOMS HEADACHE PRESSURE THICK NASAL DISCHARGE CONGESTION
LOSS OF RESONANCE IN VOICE
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TREATMENT ANALGESICS MEDICATIONS TO LOOSEN SECRETIONS
MOIST INHALATIONS SURGERY CHRONIC SINUSITIS OPENS CAVITIES ENCOURAGE DRAINAGE
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TREATMENT ADMINISTRATION OF DRUGS DESTROY BACTERIA GOOD NUTRITION REST
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TB TUBERCULOSIS INFECTIOUS DISEASE OF THE LUNGS CAUSED BY BACTERIA
MYCOBACTERUIM TUBERCULOSIS
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WHITE BLOOD CELLS MAY SURROUND INVADING TB ORGAMISMS
WALL OFF CREATING A NODULE CALLED TUBERCLE ORGANISMS REMAIN DORMANT IN THE TUBERCLE CAN CAUSE ACTIVE CASE OF TB LATER IF BODY REISITANCE IS LOW
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SYMPTOMS OF ACTIVE TB FATIGUE CHEST PAIN FEVER NIGHT SWEATS
WEIGHT LOSS HEMOPTYSIS COUGHING UP BLOOD TINGED SPUTUM
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Treatment Medications for one or more years to destroy the bacteria
Good nutrition Rest * In recent years a new strain of the TB bacteria that is resistant to drug therapy has emerged causing concern that it will become a widespread infectious disease
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EMPHYSEMA NONINFECTIOUS CHRONIC RESPIRATORY CONDITION
WALLS OF THE ALVEOLI DETERIORATE LOSE ELASTICITY CARBON DIOXIDE REMAINS TRAPPED IN THE ALVEOLI POOR EXCHANGE OF GASES
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CAUSE HEAVY SMOKING PROLONGED EXPOSURE TO AIR POLLUTANTS
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TREATMENT NO CURE AVOID SMOKING BRONCHODILATORS
PROMPT TREATMENT OF RESPIRATORY INFECTIONS OXYGEN THERAPY RESPIRATORY THERAPY
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COPD INCLUDE DISORDERS SUCH AS ASTHMA CHRONIC BRONCHITIS EMPHYSEMA TB
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CAUSES SMOKING IS THE PRIMARY CAUSE OTHER FACTORS INCLUDE ALLERGIES
CHRONIC RESPIRATORY INFECTIONS
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SYMPTOMS DYSPNEA FEELING OF SUFFOCATION PAIN BARREL CHEST
CHRONIC COUGH CYANOSIS RAPID RESPIRATIONS WITH PROLONGED EXPIRATION RESPIRATORY FALURE ……….DEATH
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LUNG CANCER DIAGNOSIS- XRAY
BRONCHOSCOPY (flexible tube passed through mouth or nose into bronchi and lungs) TREATMENT SURGERY CHEMOTHERAPY RADIATION
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CAUSED BY USUALLY SMOKING
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LUNG CANCER XRAYS ON LEFT
This chest x-ray shows adenocarcinoma of the lung. There is a rounded light spot in the right upper lung (left side of the picture) at the level of the second rib. The light spot has irregular and poorly defined borders and is not uniform in density. Diseases that may cause this type of x-ray result would be tuberculous or fungal granuloma, and malignant or benign tumors. ON RIGHT A CXR in a patient with central cancer of the right lung. Notice the white mass in the middle portion of the right lung (seen on the left side of the picture).
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Diagnostic Tests Pulmonary Function Testing (PFT) Bronchoscopy
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Pulmonary Function Tests
Check how well your lungs work Determine how much air your lungs can hold Determine how quickly you can move air in and out of your lungs Determine how well your lungs put oxygen into and remove carbon dioxide from your blood The tests can diagnose lung diseases, measure the severity of lung problems, and check to see how well treatment for a lung disease is working. Spirometry is the first and most commonly done lung function test. It measures how much and how quickly you can move air out of your lungs. For this test, you breathe into a mouthpiece attached to a recording device (spirometer). The information collected by the spirometer may be printed out on a chart called a spirogram.
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Bronchoscopy Procedure that looks inside the lungs' airways
A thin, flexible tube called a bronchoscope is inserted into the nose or mouth. The tube is passed down the throat into the airways Medicine is given for relaxation during the procedure. The bronchoscope has a light and small camera that allows the doctor to see the windpipe and airways and take pictures. If there is bleeding in the lungs or a large object stuck in the throat, a bronchoscope with a rigid tube would be used. The rigid tube, which is passed through the mouth, is wider. This allows the doctor to see inside it more easily, treat bleeding, and remove stuck objects. A rigid bronchoscopy usually is done in a hospital operating room using general anesthesia
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Bronchoscopy
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