Chapter Ten: Thorasic Viscera Flashcards
general form of the body that determines the size, shape, position, and movement of internal organs
Body Habitus
Lungs appear short and broad with high diaphragm; organs lying away from the midline
Hypersthenic
Space between lungs. Structures include: heart, great vessels, trachea, esophagus, lymphatics, and thymus. Bound anteriorly by sternum and posteriorly by vertebrae
Mediastinum
Does the mediastinum include the lungs?
No. It is the space BETWEEN the lungs
Gland. Primary control organ of the lymphatic system. Plays critical role in the development of the immune system.
Reaches maximum size at puberty the atrophies.
Thymus
Consist of nose, mouth, pharynx, larynx, trachea, bronchi and alveoli.
Respiratory System
Organ of BOTH respiratory and digestive system. Extends from skull to esophagus
Pharynx
Located from C4-C-6; nine cartilages (largest being thyroid cartilage). Epiglottis sits at top.
Larynx
AKA: Voice box
Sits atop the larynx. Elevates when a person swallows to avoid food from going down wrong tract.
Epiglottis
Another name for the Larynx
Voice Box
Extends from levels C6-T4. Bifurcate into two tubes called the primary or main stem bronchi (T4)
Trachea
AKA: Windpipe
How many cartilaginous rings does the trachea consist of?
16-20
Cartilage point where the right and left bronchus separate
Carina
Why are foreign objects more likely to pass into R bronchus as opposed to the L?
The R bronchus is more vertical and has a greater diameter.
Organs of respiration.
Lungs
Rounded and pointed upper end of a lung reaching slightly above the clavicles
Apex
Which lung is shorter and why?
Right due to the position of the liver
How many lobes does each lung have?
Right lung has three lobes and the left lung has two
Why does the left lung have only two lobes?
Because of the position of the heart
Part of the lung located where the ribs and diaphragm meet
Costophrenic Angles
Approx: T12
Why is it preferred to radiograph the chest with a patient in an upright position?
- Prevent engorgement of pulmonary vessels
- Diaphragm to lowest position
- Maximum lung field
- Air/Fluid levels (if present)
Explain why double inspiration is preferred with chest radiographs
Because more air is inhaled during the second breath
Where does the diaphragm go during inhalation?
Down
When are Inhalation and Expiration Comparative Films performed?
- Suspicion of Pnuemothorax
- Inhaled foreign bodies
- Fixed diaphragm
- Atelectasis (collapsed lung)
Name for 72” SID
Teleroentgenogram
What size film should be used for a routine chest exam?
14x17 LW or CW
Where should IR be placed during a routine chest exam?
1 1/2”-2” above relaxed shoulders
(In a PA or AP projection) What do we want the patient to do with their shoulders and why? How can we accomplish this?
Roll the shoulders forward because this moves the scapulas out of the view of lung field.
Patient could “hug” IR or they could rest back of hands on hips
During a PA projection describe the CR
perpendicular to IR and entering at level T7
What is located at T7?
Inferior aspect of scapula
PA projection: describe how the ribs should be seen on radiograph
Ten posterior ribs. This means patient took a deep enough breath
A lung marking.
Where vessels enter lungs.
Medial aspect of each lung in which the primary bronchus enters?
Hilum
Why are PA Projections preferred over AP for routine chest exams?
Less magnification of the heart. If it is done as an AP it must be noted.
During a lateral projection (routine chest exam) the MSP will be __________ to the IR
parallel
Where will the MCP be during a routine lateral chest x-ray?
Perpendicular to IR