Auscultation of breath sounds

Question 1

How does breath sounds originate?

Answer 1

By air flow in narrow parts of the respiratory system under physiological conditions.

Question 2

What causes tracheal and bronchial sounds?

Answer 2

caused by air flow in larynx, trachea and bronchi, audible during expiration.

Question 3

What causes alveolar sounds?

Answer 3

Bu the air flow into the alveoli during inspiration. Only audible for a short time or non detectable in healthy animals.

Question 4

Where can you hear tracheal sounds?

Answer 4

Clavicular depression in humans and on the ventral side of the neck in animals.

Question 5

Where should alveolar sounds be audible?

Answer 5

Between the scapulae in humans and on the thoracal sides in animals

Question 6

Ventilation can be influenced by these factors?

Answer 6

Protective reflexes (sneeze, cough)
Inhalation of noxious agents
pain
various emotional states
inhibited during swallowing