Notesale: Turn your study into money

Document Preview

Extracts from the notes are below, to see the PDF you'll receive please use the links above

---

A1
JA
Professor Idleman
EMS 121EM3
Chapter 7 Class Notes
Patent – open and clear; free from obstruction
Tidal volume – the volume of air moved in one cycle of breathing
Minute Volume – amount of air breathed in during each respiration multiplied by number of beats per
minute
Dead Air Space – Air that occupies the space between the mouth and alveoli, but that doesn’t actually
reach the area of gas exchange
Chemoreceptors – chemical sensors in the brain and blood vessels that identify changing levels of oxygen
and co2
Plasma oncotic pressure – pull exerted by large proteins in the plasma portion of blood that tends to pull
H20 from the body into the bloodstream
Respiratory Dysfunction
-

Disruption of respiratory model
Disruption of pressure
Disruption of Lung Tissue

Hydrostatic Pressure – the pressure within a blood vessel that tends to push water out of the vessel
Stretch Receptors – sensors in blood vessels that identify internal pressure
Blood Vessel Dysfunction
-

Loss of tone
Excessive Permeability
Hypertension

Systemic Vascular Resistance (SVR)
-

The pressure that the heart must overcome to pump into the system

Stroke volume – the amount of blood ejected from the heart in one contraction
Cardiac Output – amount of blood ejected from the heart in one minute; HR * SV = CO
Stroke Volume Depends on –
-

Preload
Contractility
Afterload

V/Q Match – ventilation/perfusion match; alveoli are supplied w/enough air and air in alveoli is matched
w/sufficient blood in the pulmonary capillaries to permit optimum exchange of oxygen and carbon
dioxide

A2
Perfusion – supply of oxygen to removal of wastes from the cells and tissues of the body as a result of the
flow of blood through the capillaries
Hypoperfusion – inability of the body to adequately circulate the blood to body cells to supply them with
oxygen and nutrients; a life-threatening condition AKA shock
Shock – AKA Hypoperfusion
-

-

-

Hypovolemic Shock – related to low blood volume, occurs when blood is lost from the
cardiovascular system or when the volume portion of the blood is lost

---