CMD - Dyspnea Flashcards
subjective experience of breathing discomfort that consists of qualitatitively distinct sensations that vary in intensity
Dyspnea
The motor cortex responding to unput from the control center sends neural messages to the ventilator muscle and a ____ to the sensory cortex
corollary discharge
respiratory sensations are the consequence of interactions between the efferent or outgoing, motor output from the brain to the ventilatory musces
a. feedforward
b. feedback
c. corollary discharge
d. NOTA
A
afferent, or incoming, sensory input from receptors throughout the body (feedback)
a. feedforward
b. feedback
c. corollary discharge
d. NOTA
B
3 impulses in the sensory cortex
feedback
feedforward
error signa
4 afferents to the sensory cortex
Chemoreceptors
Mechanoreceptors
Metaboreceptors
Motor cortex
The corollary discharge is sent from
a. sensory cortex
b. motor cortex
c. ventilatory muscles
d. Mechanoreceptors
B
2 factors leading to dyspnea intensity
Dyspnea affective component
Dyspnea quality and unpleasantness
Breathing is controlled by the respiratory center located in the
a. brainstem
b. pons
c. medulla
C
The following statement is true
a. The respiratory center in the pons control breathing
b. Dyspnea is a result of cortical stimulation
c. the respiratory center is stimulated by abnormalities in blood gases as detected by lung mechanoerceptors
d. AOTA
B
Disorders of the ventilatory pump include
a. increased airway resistance or stiffness
b. decreased compliance
c. J receptors
d. A and B
e. B and C
D
______ is Increased neural output by the motor cortex sent to the sensory cortex
corollary discharge
Location of sensory afferents involved in dyspnea
carotid bodies
medulla
carotid bodies and medulla are activated by (3)
hypoxemia
acute hypercapnia
acidemia
location of mechanoreceptors involved in dyspnea
Lungs
lung mechanoreceptors are stimulated by
bronchospasm, sensation of chest tightness
These recpetors are sensitive to interstitial edema, are activated by acute changes in pumonary artery pressure, and contribute to air hunger
J receptors and pulmonary vascular receptors
Location of metaboreceptors involved in dyspnea
skeletal muscle
3 parameters in assessment of dyspnea
quality of sensation
sensory intensity
baseline dyspnea index
chest tightness or constriction EXCPET
a. Asthma
b. CHF
c. COPD
d. NOTA
C
Increased work or effort of breathing EXCEPT
a. CPD
b. asthma
c. neuromuscular disease
d. chest wall disease
e. NOTA
E
Air hunger, need to breath urge to breathe
a. asthma
b. COPD
c. PE
d. pulmonary fibrosis
e. neuromuscular disease
E
Air hunger, need to breath urge to breathe
a. asthma
b. COPD
c. CHF
d. AOTA
D
Inability to get a deep breath, unsatisfying breath
a. CHF
b. PE
c. chest wall disease
d. AOTA
e. NOTA
C
Heavy breathing, rapid breathing, breathing more can be found in
a. sedentary status in healthy individual
b. patient with cardiopulmonary disease
c. both
d. neither
C
Modified borg scale is used in
a. quality of sensation
b. sensory intensity
c. affective dimension
B
Chronic respiratory disease questionnaire are used as a methods which indirectly assess dyspnea due to other factors that limit it
Baseline Dyspnea Index
Evokes a stronger affective response then does increased work of breathing
Air hunger
What are the most common obstructive lung diseases
asthma and COPD
True of dyspnea caused by diseases of the airways EXCEPT
a. Asthma and COPD are characterized by expiratory airflow obstruction
b. leads to hypoxemia and hypocapnia
c. Asthma and COPD causes hyperinflation of lungs and chest wall
d. NOTA
B; hypercapnia
Cause of hypoxemia and hypercapnia in asthma and COPD
V/Q mismatch
more common as a consequnce of the different ways in which oxygen and carbon dioxide bind to hemoglobin
a. hypoxemia
b. hypoxia
c. hypercapnia
d. hypocapnia
A
Stiffen the chest wall
a. COPD
b. Kyphoscoliosis
c. Myasthenia gravis
d. Guillain-Barre Syndrome
B
Weaken ventilatory muscles A. Myasthenia gravis B. Guillain-Barre C. both D. Neither
C
interstitial lung disease is associated to
a. increased stiffness
b. increased work of breathing
c. both
d. neither
C
Effect of coronary artery disease and nonischemic cardiomyopathies effect on
left ventricular end- diastolic volume
a. Increase
b. Decrease
A