19 Demo Thoracic Ultrasound

Question 1

Differentiate between 2 different ultrasound probes

Answer 1

Curved array:

• 3.5 - 5 MHz
• Lower resolution
• Greater depth

Linear probe:

• 7 - 12 MHz
• Higher resolution
• Decreased depth

Question 2

Describe the muscles involved in inspiration

Answer 2

Inspiration:

• External intercostal muscle
• Intercondral portions of internal intercostal muscle
• Above two elevate the ribs
• Diaphragm
• Sternocleidomastoid muscle and scalene - elevate ribs and move sternum anteriorly

Question 3

How can phrenic nerve function be assessed

Answer 3

Sniff test (forced inspiration) to test the movement of diaphragm

Normal: caudal movement
Abnormal: paradoxical cranial movement