Mediastinum And Pulmonary Parenchyma Flashcards Preview

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Flashcards in Mediastinum And Pulmonary Parenchyma Deck (18)
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1

Mediastinum

Two layers of pleura
Potential space
Thoracic inlet to diaphragm

2

Mediastinum size

Less than 2 X the width of T2

3

Cranial mediastinum stuctures seen radio graphically

Trachea
+/- esophagus
Cranial mediastinal reflection

4

Neck flexible can cause

Focal ventral deviation of trachea

5

Esophagus

Entire mediastinum
Left and dorsal to trachea
Normally not seen

6

Esophagus normal appearance

Small volume luminal gaps can be seen
Can occasionally see caudal thoracic esophagus
(Especially on left lateral)

7

Esophageal

Barium
-liquid, paste, food
Assess
- motility, muscosa, strictures, masses/foreign bodies

8

Canine esophagus

100 % striated

9

Feline esophagus

2/3 striated 1/3 smooth

10

Structures seen radiographically from middle mediastinum

Esophagus (+/-)
Cardiac silhouette
Trachea/bifurcation

11

Evaluation of cardiac size in dogs

Lateral
-2.3-3.5 intercostal spaces wide
VD
-half to 2/3 width of thorax

12

Objective evaluation of cardiac size

Vertebral heart scale
-length
--carina to apex
-width
--perpendicular to length
Start at T4

13

Vertebral heart scale for dogs and cats

Dog = 9.7 +/- 0.5
Cat = 7.5 +/- 0.3

14

Clock face analogy lateral view

LA 12-3
LV 3-5
RV 5-730
RA 730-9
MPA 9-12

15

Clock face analogy VD view

AA 11-1
MPA 1-2
LAu 2-3
LV 3-5
RV 530-930
RA 9-11

16

Which side of the heart is big in PDA

Left

17

Cardiac size evaluation in cats

Lateral
-2.0-2.5 intercostal spaces wide
VD
- ~1/2 to 2/3 the width of thorax
Excessive pericardial fat depostion

18

Structures seen radiographically in caudal mediastinum

Descending aorta
Esophagus (+/-)
Caudal vena cava