Thyroid Gland Flashcards Preview

Anatomy (TOPNOTCH SUPPLEMENT) > Thyroid Gland > Flashcards

Flashcards in Thyroid Gland Deck (17):
0

Blood supply for superior thyroid?

External carotid

1

Blood supply for inferior thyroid?

Thyrocervical trunk

2

Venous drainage for superior thyroid?

Internal Jugular Vein

3

Venous drainage for middle thyroid?

Internal jugular vein

4

Venous drainage for inferior thyroid?

Brachiocephalic

5

In up to 12% of individuals, a small midline artery, called the Thyroidealma artery, arises from the aortic arch or brachiocephaloc trunk and reaches the thyroid isthmus inferiorly

Thyroidealma artery

6

First endocrine gland to develop; 24 days after fertilization

Median endodermal thickening in the floor of the primordial pharynx - forms a small outpouching-thyroid diverticulum

As the embryo and tongue grow, the developing thyroid gland descends in the neck

The developing thyroid gland is connected to the tongue by a narrow tube, thyroglossal duct

Thyroid gland

7

Normally thyroglossal duct atrophies & disappears, but a remnant may persists forming a cyst

Painless, progressively enlarging movable mass; asymptomatic unless becomes infected

Following infection - perforation of the skin forming a thyroglossalduct sinus that opens in the median plane of the neck

Thyroglossal duct cyst and sinus

8

Abnormal communication between the trachea and esophagus

Associated with esophageal atresia

Results from improper division of the foregut by the tracheoesophageal septum

Tracheoesophageal Fistula

9

Tube is inserted between the cricoid & thyroid cartilages

Vertical incision is made through the ff structures: skin, superficial fascia, investing layer of deep cervical fascia, pretracheal fascia, larynx

Cricothyroidotomy

10

Complications of thyroidectomy

Thyroid storm (hyperpyrexia & tachyarrhythmia)

Hypoparathyroidism

Damage to recurrent or superior laryngeal nerve

11

Anywhere along the path of embryonic descent from the base of the tongue (foramen cecum) to the superior mediastinum

Aberrant thyroid tissue

12

Midline of the neck

Cystic remnant of the thyroid descent

Thyroglossal duct cyst

13

Superior suspensory ligament of the thyroid gland

Located adjacent to the cricoids cartilage

Ligament of Berry

14

The ff though the tracheoesophageal groove

R recurrent laryngeal nerve (around subclavian artery)

L recurrent laryngeal nerve (recurs around the arch of aorta at the Ligamentum arteriosum)

15

Venous drainage

Superior thyroid veins

Middle thyroid veins

Inferior thyroid veins

⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️

Internal jugular vein

16

Arterial supply

Superior thyroid artery (from external carotid artery)

Inferior thyroid artery (from subclavian & thyrocervical trunk)

Thyroid ima artery (from aortic arch)