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Medical Coding - Respiratory System

The Primary Function Of The Respiratory System
To oxygenate the blood so that the blood can carry oxygen to all parts of the body
The Upper Respiratory System
Includes the ears, nose, throat, and sinuses
Acute Respiratory Infections
Can strike either upper or lower respiratory systems
Influenza, Commonly Known As The Flu
A contagious disease that attacks the respiratory system, caused by a virus that commonly mutate and constantly require new vaccinations to prevent the disease from spreading rapidly among human populations
Viruses And Bacterial Infections
Usually the cause for infections of the respiratory tract
The Lower Respiratory System
Includes the trachea (windpipe), bronchial tubes, and the lungs
An inflammation of the lungs caused by an organism
Lobar Pneumonia
Confined to one lobe of the lung
Tends to be patchy within both lobes.
The Respiratory System Subsection Is Arranged By
Anatomic site (e.g. Nose, accessory sinus, larynx)
Chronic Obstructive Pulmonary Disease often aggravated by environmental factors
Inflammation and narrowing of the bronchi due to increased mucus secretions
A condition in which the airways are hypersensitive and react to inhaled irritants by narrowing or obstructing
Reduces the elasticity of the lungs, which normally hold the airways open. As the elasticity decreases, the small airways of the lung collapse when the patient breathes out, making it hard to completely exhale.
Supralaryngeal Structures
Cleanse, warm, moisten, and test inflowing air
Larynx (Voice Box)
Controls the volume of inflowing air; produces selected pitch(vibration frequency) in the moving column of air
Infralaryngeal Structures
Distribute air to the alveoli of the lung where the actual external respiration takes place
Main Subdivisions
The main subdivisions of the respiratory system may be identified by their relationship to the voice box or larynx.
Boyle's law
as the volume (V) of a gas-filled container increases, the pressure (P) inside decreases; as the volume (V) of a closed container decreases, the pressure (P) inside increases. When two connected spaces of air have different pressures, the air moves from the space with greater pressure to the one with lesser pressure. In regard to breathing, we can consider the air pressure around the human body to be constant. The pressure inside the lungs may be greater or less than the pressure outside the body. Thus, a greater internal pressure causes air to flow out; a greater external pressure causes air to flow in.
The Human Trunk
compared to a hollow cylinder divided into upper and lower cavities by the diaphragm. The upper is the thoracic cavity and is essentially gas-filled. The lower is the abdominopelvic cavity and is essentially water-filled.
Costal (Thoracic) Breathing Inhalation
Muscles attached to the thoracic cage raise the rib cage. A typical rib might be compared to a bucket handle, attached at one end to the sternum (breastbone) and at the other end to the vertebral column. The "bucket handle" is lifted by the overall movement upward and outward of the rib cage. These movements increase the thoracic diameters from right to left (transverse) and from front to back (A-P). Thus, the intrathoracic volume increases. Recalling Boyle's law, the increase in volume leads to a decrease in pressure. The air pressure outside the body then forces air into the lungs and inflates them.
Costal (Thoracic) Breathing Exhalation
The rib cage movements and pressure relationships are reversed for exhalation. Thus, intrathoracic volume decreases. The intrathoracic pressure increases and forces air outside the body.
a thin, but strong, dome-shaped muscular membrane that separates the abdominal and thoracic cavities.
The Abdominal wall
elastic in nature
The Abdominal cavity
filled with soft, watery tissues.
Diaphragmatic (Abdominal) Breathing Inhalation
As the diaphragm contracts, the dome flattens and the diaphragm descends. This increases the depth (vertical diameter) of the thoracic cavity and thus increases its volume. This decreases air pressure within the thoracic cavity. The greater air pressure outside the body then forces air into the lungs.
Diaphragmatic (Abdominal) Breathing Exhalation
As the diaphragm relaxes, the elastic abdominal wall forces the diaphragm back up by pushing the watery tissues of the abdomen against the underside of the relaxed diaphragm. The dome extends upward. The process of inhalation is thus reversed.