Bits and Pieces

Question 1

Order of the structures in the carotid sheath

Answer 1

Medial - Common Carotid Art
Lateral IJV

With the vagus in between

Question 2

Where would we put in a central line and why?

Answer 2

The right IJV because:

• Its has a straight path to the SVC
• Bigger than the left IJV
• No risk of injuring the thoracic duct
• More likely to cause pneumothorax on the left as the lung is higher

Question 3

Where do the IJV and CCA emerge inferiorly?

Answer 3

Between the heads of the SCM

Question 4

What kind of scan would you use to look at salivary ducts?

Answer 4

A Sialogram

Question 5

Where does the middle meningeal artery run?

Answer 5

It branches off the maxillary art and passes into the skull through foramen spinosum

Then it grooves the skull internally under the pterion

Question 6

What is the point of densest rods and cones (and so greatest visual acuity) in the eye?

Answer 6

The Fovea Centralis

Question 7

Function of the Stapedius and Tensor Tympani?

Answer 7

TT - Dampens the vibrations of the Tympanic membrane in order to dampen out any background sounds of the body like chewin

Stapedius - Stabilizes the Stapes, effectively dampening overly loud sounds

Question 8

When do the fontanelles fuse?

Answer 8

Posterior fontanelle - 2 to 3 months
Sphenoidal fontanelle - 6 months
Mastoid fontanelle - 6 to 18 months
Anterior fontanelle - 18–24 months.

Question 9

Where in the larynx does epithelium change?

Answer 9

Its non-keratinized Stratified Squamous until just below the vocal chords.

The false vocal chord and everything below the true one is Pseudostratified Ciliated Columnar epithelium