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GI Final > Blood Vessels > Flashcards

Blood Vessels Flashcards

1
Q

Branches of celiac trunk

A

@ T12
Left gastric a.
Splenic a.
Common hepatic a.

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2
Q

Branches of SMA

A 
@ L1
Inferior pancreaticoduodenal a. 
Middle colic a. 
Right colic a. 
Iliocolic a.
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3
Q

Branches of IMA

A

@ L3
Left colic a.
Sigmoid aa.
Superior rectal a.

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4
Q

Suprarenal aa.

A

L1

Paired Visceral

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5
Q

Renal aa.

A

L1/L2

Paired Visceral

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6
Q

Gonadal aa.

A

L2

Paired Visceral

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7
Q

Inferior phrenic aa.

A

T12

Paired parietal

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8
Q

Subcostal aa.

A

T12

Paired Parietal

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9
Q

Lumbar aa.

A

L1-L4

Paired Parietal

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10
Q

Foregut Innervation

A

Para: Vagus
Sym: Thoracic splanchnic nn. (T5-T9)
Referred Pain: Epigastrium

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11
Q

Midgut Innervation

A

Parasympathetic: Vagus
Sym: Thoracic splanchnic nn. (T8-T12)
Referred Pain: Umbilical

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12
Q

Hindgut Innervation

A

Para: Pelvic splanchnic nn.
Sym: Lumbar splanchnic nn. (L1-L2)
Referred pain: Hypogastrium

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13
Q

Hepatic Portal v.

A

75-80% hepatic blood supply

Sustains liver parenchyma

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14
Q

Hepatic a.

A

Sustains non-parenchymal structures (intrahepatic bile ducts)

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15
Q

Branches of gastroduodenal a.

A

Anterior Superior Pancreaticoduodenal a.

Posterior Superior Pancreaticoduodenal a.

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16
Q

Nutcracker Syndrome

A

Loss of mesenteric fat leads to SMA compressing 3rd part of duodenum and left renal v.
Presents w/ potential variocele, proteinuria, hematuria & n/v

17
Q

Origin of Superior rectal a.

A

IMA

18
Q

Origin of middle rectal a.

A

Internal iliac aa.

19
Q

Origin of inferior rectal a.

A

Internal pudendal a.

20
Q

Rectal Drainage (portal system)

A

Superior rectal v.

21
Q

Rectal Drainage (Caval system)

A

Middle rectal v.
Inferior rectal v.
Rectal venous plexus

22
Q

Internal Hemorrhoids

A
  • Prolapse of rectal mucosa that contains normally dilated veins of internal venous plexus
  • Bright red bleeding
  • NOT painful b/c above pectinate line
23
Q

External Hemorroids

A
  • Thromboses in veins of external venous plexus
  • Covered by skin
  • Painful b/c below pectinate line (inferior anal nerves are somatic)
24
Q

IVC

A
  • Begins anterior to L5 and enters caval opening into diaphragm @ T8
  • Right of aorta
  • Longer than aorta
25
Q

Esophageal portal-caval anastamosis

A
  • B/w left gastric v and azygos v.
  • Increased P in liver occludes portal v blood flow — blood flows backwards via left gastric v — esophageal vv — azygos vv.
  • *Esophageal varices
26
Q

Rectal portal-caval anastamosis

A
  • B/w superior/middle rectal v and inferior rectal v.

* *Hemhorroids

27
Q

Paraumbilical portal-caval anastamosis

A
  • B/w paraumbilical and epigastric vv
  • Paraumbilical vv reopen
    • Caput medusae
28
Q

Retroperitoneal portal-caval anastamosis

A
  • B/w colic vv and systemic retroperitoneal vv
  • Colic vv and lumbar vv — caval system
    • Esophageal varices
29
Q

Sympathetic Abdominal Innervation

A
  • Greater splanchnic (T5-T9)
  • Lesser splanchnic (T10-T11)
  • Least splanchnic (T12)
  • Lumbar splanchnic (L1-L2)
30
Q

Parasympathetic Abdominal Innervation

A
  • Vagus n. (Ant and post trunks)
  • Pelvic splanchnic nn. (S2-S4)
  • Abdominal autonomic plexuses and extensions
  • Intrinsic (enteric) parasympathetic ganglia
31
Q

Vagus N.

A

Convey presynaptic parasympathetic and visceral afferent fibers to abdominal aortic plexuses

32
Q

Pelvic Splanchnic

A
  • S2-S4

- Convey PREsympathetic parasympathetic fibers to inferior hypogastric plexus

33
Q

Visceral Afferents and Pain

A
  • Pain travels with sympathetics

- EXCEPT below pelvic line (middle of sigmoid colon), where pain travels with parasympathetics

34
Q

Visceral Afferents and visceral reflexes

A

Travels with parasympathetics

35
Q

I ate ten eggs at noon

A

T8 - IVC
T10 - esophagus
T12 - aorta

GI Final (13 decks)

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