Oxygen Transport System

Question 1

SOB, Dyspnea at rest

Answer 1

Block of perfusion, BIG RED FLAG!!!

Question 2

OTS Coneptual Model

Answer 2

OTS is considered the basis for life, it is a multi-step process
Impairment may arise at any step in the process and may cause changes at any point
Disruption of the system is considered a medical emergency

Question 3

Pulmonary Circulation

Answer 3

The volume of blood circulating through the pulmonary system is equal to the volume of blood within the peripheral circulatory system

Question 4

Peripheral Circulation

Answer 4

Peripheral circulatroy system is the conduit to provide metabolically active tissues with oxygenated blood. Purpose: including micro circulation at the tissue level is to provide saturated O2 blood and to remove partially desaturated blood

Question 5

Lymphatic Circulation

Answer 5

Has an essential role in regulating interstitial fluid dynamics

Question 6

Steps in OTS

Answer 6

1. Air Quality and Inspired Oxygen: bad quality affects entire system
2. Airway
3. Lungs and Chest Wall
4. Diffusion
5. Perfusion
6. Myocardial Function
7. Peripheral Circulation
8. Tissues extraction & utilization of O2
9. Return of partially de-saturated blood and CO2 to the lungs

Question 7

Variables to the OTS

Answer 7

Oxygen Delivery (DO2)
Oxygen Consumption (VO2)
Oxygen Extraction Ratio (OER): how efficient the system is = delivery/consumption

Question 8

What perturbs the OTS?

Answer 8

1. Basal Metabolic Rate; BMR
2. Level of Arousal
3. Gravitational Stresses: VQ ratio, optimal
4. Exercise and Activity
5. Change in myoglobin and hemoglobin levels: content in blood