Anterior Abdominal Wall Anatomy Flashcards
What line divides left from right quadrants?
Median plane
What line divides the upper from lower quadrants?
Transumbilical Plane
Xiphisternal Plane
Rib 7
T9
Unnamed Plane
Rib 8
T11
Transpyloric Plane
Rib 9
L1
Subcostal Plane
Rib 10
L3
Transtubercular Plane
L5
Widest part of the hips!
Interspinous Plane
ASIS
S2
Layers of Abdominal Wall
superficial –> Deep
Camper's Fascia (yellow, fatty layer) Scarpa's Fascia (white, deep membranous layer) External Oblique M. Internal Oblique M. Transversus Abdominis M. Transversalis Fascia (Endoabdominal) Extraperitoneal Fat Parietal Peritoneum
Direction of External Oblique Muscles?
Hands in pockets
Direction of Internal Oblique Muscles
Perpendicular to external oblique muscles.
Up to heart
Direction of Transversus Abdominis Muscles
Horizontal
Direction of Transversus Abdominis Muscles
Horizontal
Linea alba
central line where fascia of the rectus sheath connects
Xiphoid process to pubic symphysis
What three layers make up the Rectus Sheath?
External Oblique
Internal Oblique
Transversus Abdominis
Medial fusion: Linea alba
Lateral fusion: Linea semilunaris
Anterior structures above the Arcuate Line?
Anterior:
External Oblique
Internal Oblique
Posterior structures above the Arcuate Line
Internal Oblique
Transversus Abdominis
Transversalis fascia
Anterior structures below Arcuate line
External Oblique
Internal Oblique
Transversus Abdominis
Posterior structures below Arcuate line
Transversalis fascia
Neurovasculature of the abdominal wall is located between which two layers?
Internal Oblique
Transversus Abdominis
Thoracoabdominal Nerves
T7-T11
Subcostal Nerves
T12
Iliohypogastric Nerve
L1
Ilio-inguinal Nerve
L1
What does the inferior epigastric artery branch off of?
External iliac A
Where would you make a midline incision?
Xiphoid process to pubic symphysis
Where would you make a subcostal incision?
Parallel to costal margin, 2.5 cm inferior
Where would you make a suprapubic midline?
C-sections!
Horizontal at the pubic hair line, with slight convexity
Where would you make a paramedian incision?
From costal margin to iliac crest along the linea semilunaris
What are the three Deep lymph nodes?
External iliac nodes
Common iliac nodes
Lumbar nodes
What are the three Superficial lymph nodes?
Axillary lymph nodes
Parasternal lymph nodes
Superficial inguinal nodes
Lymph above the transumbilical plane will travel to what lymph nodes?
Axillary lymph nodes
Lymph below the transumbilical plane will travel to what LN?
Superficial inguinal lymph nodes
Going medial to laterl, what is the order of folds on the internal surface of the anterior abdominal wall?
Median umbilical Fold
Medial umbilical Fold
Lateral umbilical Fold
What is the medial umbilical fold a remnant of?
Umbilical arteries
What is the median umbilical fold a remnant of?
Urachus (allantois)
Where are the supravesical fossae located?
Between median and medial umbilical folds
Where are the medial inguinal fossae located?
Between medial and lateral umbilical folds
Where are the lateral inguinal fossae located?
Lateral to the lateral umbilical folds
In which fossa would a direct inguinal hernia be located?
Medial inguinal fossa
In which fossa would an indirect inguinal hernia be located?
Lateral inguinal fossa
Three main features of Prune Belly Syndrome
- Weak/ deficient Anterior abdominal wall muscles
- Urinary Tract anomalies
- Bilateral cryptorchidism