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Abdomen Summary of Important Questions

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A summary of high-yield points and key questions on the abdomen and inguinal canal. This document excludes the abdominal organs since there is already a summary document on these.

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  • October 12, 2021
  • 16
  • 2021/2022
  • Summary
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Available practice questions

Flashcards 57 Flashcards
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Some examples from this set of practice questions

1.

What are the boundaries of the Abdomen? Namely: Superior, Inferior, Anterior and Posterior.

Answer: Superior = diaphragm Inferior = pelvic cavity Anterior and lateral = abdominal wall muscles Posterior = spinal column

2.

Between which 2 anatomical landmarks does the abdomen lie?

Answer: 1) The Xiphoid Process 2) The Pubic Symphisis

3.

Name 3 horizontal/transverse planes dividing the abdomen?

Answer: 1. Transpyloric (L1) 2. Transumbulical (L4) 3. Transtubecular (L5)

4.

Name 2 horizontal planes dividing the abdomen?

Answer: 2 Midclavicular lines

5.

Name the 9 Abdominal Quadrants and give 2 organs that lie in this quadrant?

Answer: 1. Right hypochondrium: Liver, GB 2. Epigastrium: Liver, Stomach, Pancreas 3. Left hypochondrium: Pancreas, Spleen, L Suprarenal, 4. Right lumbar: R Kidney, Ascending colon 5. Umbilical: small intestine, duodenum 6. Left lumbar: L Kidney, descending colon 7. Right iliac (inguinal): Cecum, Appendix 8. Hypogastric: Bladder, Ovaries, Uterus, Sigmoid Colon 9. Left iliac (inguinal): descending & sigmoid colon

6.

What 2 muscles fuse to form linea alba?

Answer: Rectus Abdominus Muscles

7.

What are the Layers of the Abdominal Wall? (Hint: mnemonic is SSS ExIT)

Answer: • Skin. • Subcutaneous fat (Campers fascia) • Scarpas fascia • External oblique • Internal oblique muscle • Transverse Abdominal muscle • Transversalis fascia • Parietal peritoneum

8.

Name 4 abdominal quadrants and name 2 organs in this quadrant?

Answer: Right upper quadrant - liver, gallbladder, duodenum, common bile duct Right lower quadrant - appendix, ascending colon, transverse colon, cecum, ileum Left upper quadrant- spleen, pancreas, stomach, pancreatic duct Left lower quadrant- ileum, transverse colon, descending colon

9.

Is Campers fascia fatty or membranous?

Answer: Fatty because it is a major site of fat storage.

10.

Why is Camper\'s fascia a common site of infection in the genitals if it is \"abdominal fascia\"?

Answer: Campers fascia extends from the abdomen, over the penis and into the scrotum/ labia in a female to the genitals. Therefore Campers fascia is a potential route of infection from abdomen → genitals

Intro, Anterior Abdominal Wall, Inguinal

1. Describe the extent of the abdomen:
Origin: Xiphoid Process (medially) & diaphragm (laterally)
Termination: Pelvic Inlet & Pubic Symphisis

2. Boundaries of the Abdominal Cavity
Superiorly: Diaphragm
Inferiorly: Pelvic Inlet
Anteriorly: Muscles (RA, EO, IO, TA), Thoracic Margin
Posteriorly: Lower ribs, Muscles (Psoas M, Quad Lumb)


3. Abdominal Wall Landmarks
Linea Alba: fusion of aponeurosis between 2 Rectus M’s.
Linea Semilunaris: Lateral edge of Rectus Abd. 9th rib to pubic
tubercle.
Umbulicus: Below Linea Alba
Arcuate Line: Posterior layer of rectus sheath



4. Abdominal Planes
Vertical
• R&L Mid-clavicular Lines
Horizontal
• Subcostal/ Transpyloric Planes (10 CC)
• Transumbulical
• Intertubecular (btwn iliac crests & L5).

5. 4 Abdominal Quadrants
*Divided by Transumbulical Plane
• Right Upper Quadrant
• Right Lower Quadrant
• Left Upper Quadrant
• Left Lower Quadrant

6. 9 Abdominal Regions
1. Right hypochondrium: Liver, GB
2. Epigastrium: Liver, Stomach, Pancreas
3. Left hypochondrium: Pancreas, Spleen, L Suprarenal,
1 2 3 4. Right lumbar: R Kidney, Ascending colon
5. Umbilical: small intestine, duodenum
4 5 6 6. Left lumbar: L Kidney, descending colon
7. Right iliac (inguinal): Cecum, Appendix
7 8 9 8. Hypogastric: Bladder, Ovaries, Uterus, Sigmoid Colon
9. Left iliac (inguinal): descending & sigmoid colon

,10. Referred pain

Foregut structures: referred to epigastric area
Midgut structures: referred to umbulical region
Hindgut structures: referred to hypogastric area




11. Layers of the Abdominal Wall: SSS Exit
• Skin.
• Subcutaneous fat (Campers fascia)
• Scarpas fascia
• External oblique
• Internal oblique muscle
• Transverse Abdominal muscle
• Transversalis fascia
• Parietal peritoneum

12. High-yield facts on fascia
Campers Fascia: Major Site of Fat Storage
Scarpa’s Fascia: No Fat, fuses with Fascia Lata of Thigh


12. Types of Abdominal Incisions




13. Muscles of Antero-Lateral Abdominal Wall

1)External Oblique Muscle
2)Internal Oblique Muscle
3)Transversalis Muscle
4)Rectus Abdominus


13.1 Actions of External Obliques
Unilaterally: Bends the trunk to the same side AND rotates
the trunk to the opposite side
Bilaterally: Flexes Trunk

, 14. Actions of Internal Obliques
Unilaterally: Bends the trunk to the same side AND rotates
the trunk to the SAME side
Bilaterally: Flexes Trunk

15. Transversalis Muscle
Compresses abdominal contents.

16. Rectus Abdominus: Flexes, tenses trunk

17. Transversalis Fascia
Deepest layer of Abdominopelvic Cavity
- Forms Deep Inguinal Ring & Femoral Sheath
- Deep Ring is formed by the TF pouching out above the
midpoint of the inguinal ligament
- Femoral Sheath is an inferior extension of TF containing
the femoral canal (Artery + Vein)

18. Superficial Arteries of Anterior Abd Wall
• Superficial Epigastric A.
• Br of Femoral A.

19. Deep Arteries of Anterior Abd. Wall
- Superior & Inferior Epigastric Arteries
- Superior: br internal 3thoracic artery
- Inferior: br external iliac artery
Others: Post. Intercostals, lumbar, deep circumflex, iliac A.

20. Deep Veins of Anterior Abd. Wall
1. Superior epigastric,
2. Inferior epigastric
3. Deep circumflex iliac veins
4. Posterior intercostal veins
5. Lumbar veins

21. Superficial Veins of Anterior Abd. Wall
- Above umbilicus: Into lateral thoracic vein
- Paraumbulical veins
- Below umbilicus: Superficial Epigastric

22. Nerve Supply (7)
• FIVE lower intercostal nerves (T7-T11)
• ONE SUBCOSTAL NERVE (T12)
• L1: Ilioinguinal & Illiohypogastric Nerve
• All nerves lie betwn. internal oblique & transversus muscles

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