Key Terms Test 2 Flashcards
(85 cards)
anemia
a condition characterized by a lower than normal hemoglobin concentration
erythrocyte
red blood cell
erythropoiesis
production of erythrocytes
erythropoietin
- a hormone produced primarily by the kidneys
- erythropoietin levels increase if the kidneys detect low levels of O2
hematocrit (HCT)
- measures the mass/weight of the RBC (how big it is)
- generally 3x the HGB
hemoglobin (HGB)
- main component of RBCs
- acts as the vehicle in transportation of O2
red blood cell (RBC)
principle means of delivering oxygen to body tissues
reticulocytes
immature RBCs
gas exchange
the process by which oxygen is transported TO cells and carbon dioxide is transported FROM cells
ischemia
inadequate blood supply to an organ/part of the body
hypoxia
low levels of O2 in body tissues or cells
anoxia
no oxygen to cell or tissue
diffusion
movement of a substance from high concentration to low concentration
air trapping
incomplete emptying of alveoli during expiration due to loss of lung tissue elasticity (emphysema), bronchospasm (asthma), or airway obstruction
Alpha1-antitrypsin deficiency
- genetic disorder resulting from deficiency of alpha1-antitrypsin, a protective agent for the lung
- Increases the patient’s risk for developing panacinar emphysema even in the absence of smoking
asthma
- a heterogenous disease usually characterized by chronic airway inflammation
- Defined by history of symptoms such as wheeze, shortness of breath, chest tightness, and cough that vary over time and in intensity
bronchiectasis
- chronic, irreversible dilation of the bronchi and bronchioles that results from the destruction of muscles and elastic connective tissue
- Dilated airways become saccular and are a medium for chronic infection
chest percussion
manually cupping hands over the chest wall and using vibration to mobilize secretions by mechanically dislodging viscous or adherent secretions in the lungs
chest physiotherapy (CPT)
- therapy used to remove bronchial secretions, improve ventilation, and increase the efficiency of the respiratory muscles
- Types include postural drainage, chest percussion and vibration, and breathing retraining
chronic bronchitis
a disease of the airways defined as the presence of cough and sputum production for at least a combined total of 3 months in each of 2 consecutive years
desaturate
a precipitous drop in the saturation of hemoglobin with oxygen
dry-powder inhaler (DPI)
a compact, portable inspiratory flow-driven inhaler that delivers dry powder medications into the patient’s lungs
emphysema
a disease of the airways characterized by destruction of the walls of overdistended alveoli
flutter valve
- portable handheld mucus clearance device consisting of a tube with an oscillating ball inside
- Upon expiration, high-frequency oscillations facilitate mucous expectoration