Dyspnea

Question 1

Dyspnea causes

Answer 1

Disconnect between expected work of brething and system output (chest distension and airflow)

Hypercarbia
Hypoxemia

Question 2

Other things abput dyspnea

Answer 2

Sensation

Exertion should WORSEN…this is how to distinguihs from psychological

Pts accomodate to chronic states…but sensitive to acute

Question 3

Difference between expected output and actual output

Answer 3

BS resp center has system output to resp apparatus…this directly feeds back on BS resp center…BS resp also in connection with higher centers…resp appratus then has relationship with chemoreceptors
that feedback on BS

Basically the higher centers sense the increased output from the resp centers

Question 4

What happens to ventilation rate in both hypercapnea and hypoxia

Answer 4

In hypercapnea, the respiration rate will increase…this is augmented by hypoxia

Hypoxia alone oes not have much of an effect