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RT 335 Chapter 20 Pulmonary Edema Exam
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RT 335 Chapter 20 Pulmonary Edema ExamEdema
swelling (fluid overload)
Pulmonary Edema
Results from excessive movement of fluid from the pulmonary vascular system to the
extravascular system and air spaces of the lungs
What happens during Pulmonary Edema?
- The alveolar walls and interstitial spaces swell
- The alveolar surface tension increases and causes alveolar shrinkage and atelectasis
- The abundance of fluid in the interstitial spaces causes the lymphatic vessels to widen
and the lymph flow to increase
Anatomic Alterations of the Lungs
- Interstitial edema
- Alveolar flooding
- Increased surface tension of alveolar fluids
- Alveolar shrinkage and atelectasis
- Frothy white (or pink) secretions throughout the tracheobronchial tree
, Always think of Pulmonary Edema when you see?
Frothy white (or pink) secretions
The etiology of pulmonary edema can be divided into the following two categories:
Cardiogenic (caused by heart)
Noncardiogenic
Cardiogenic Pulmonary Edema is
The most common cause of left-sided heart failure (CHF)
Cardiogenic Pulmonary Edema occurs when
the left ventricle is unable to pump out a sufficient amount of blood during each
ventricular contraction
Left side of heart pump blood to
the rest of the body
left ventricular ejection fraction (LVEF)
the measurement of how much blood is being pumped out of the left ventricle of the
heart with each contraction
Normal values for the LVEF range between
55% and 70%
A LVEF less than 40% may confirm
heart failure
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