Conferences Flashcards
Flashcards pulled from conference 15 forward
What 3 structures are located in superficial fascia of anterior abdominal wall?
- Superficial veins
- Superficial lymphatics
- Cutaneous nerves
Into what 3 venous systems do superficial and deep anterior abdominal wall veins drain?
- Superior to umbilicus: superior vena cava
- Inferior to umbilicus: inferior vena cava
- Paraumbilical veins: portal venous system
What are the 2 drainage pathways for lymphatic vessels found in anterior abdominal wall?
- Superior to umbilicus: axillary lymph nodes
2. Inferior to umbilicus: inguinal lymph nodes
What 4 nerves innervate the skin of anterolateral abdominal wall via their cutaneous branches?
- Thoracoabdominal intercostals
- Subcostal
- Iliohypogastric
- Ilioinguinal
What spinal segments supply thoracoabdominal intercostals?
T7-11
What spinal segments supply subcostal?
T12
What spinal segments supply iliohypogastric?
L1
What spinal segments supply ilioinguinal?
L1
What are 3 dermatomal landmarks on anterior abdomen?
- Xiphoid process: T7
- Umbilicus: T10
- Inguinal region: L1
Branches of what spinal nerves innervate the muscles of anterior abdominal wall?
T7-L1
What innervates parietal peritoneum?
T7-L1 spinal nerves
What are the 4 muscles of anterior abdominal wall?
- External oblique
- Internal oblique
- Transversus abdominus
- Rectus abdominus
What are the functions of the muscles of anterior abdominal wall?
- Flexion, lateral bending, rotation of trunk
- Increase intraabdominal pressure by contraction against closed glottis to facilitate coughing, defecation, urination, and childbirth
What makes up inguinal ligament?
External abdominal oblique aponeurosis
What is inguinal canal?
- Begins laterally as evagination of transversalis fascia (deep inguinal ring)
- Runs oblique and emerges through external oblique aponeurosis (superficial inguinal ring)
What forms deep inguinal ring?
Transversalis fascia
What forms superficial inguinal ring?
External oblique aponeurosis
What are the layers of spermatic cord?
- Internal spermatic fascia
- Cremasteric fascia and muscle
- External spermatic fascia
What creates internal spermatic fascia?
Transversalis fascia
What creates cremasteric muscle and fascia?
Internal oblique
What creates external spermatic fascia?
External oblique
What are the 7 contents of inguinal canal (males)?
(I like girls that play cards drunk)
- Ductus deferens
- Testicular artery
- Testicular vein (pampiniform venous plexus)
- Ilioinguinal nerve
- Genital branch of genitofemoral nerve
- Sympathetics
- Lymphatics
What are the 4 contents of inguinal canal (females)?
(GIRL)
- Round ligament of uterus
- Ilioinguinal nerve
- Genital branch of genitoemoral nerve
- Lymphatics
What is an indirect inguinal hernia?
Bowel surrounded by parietal peritoneum protrudes through deep inguinal ring and may transverse entire inguinal canal and exit superficial inguinal ring into scrotum
What is a direct inguinal hernia?
Bowel surrounded by parietal peritoneum rips through transversalis fascia and may transverse the entire inguinal canal and exit superficial inguinal ring into scrotum
How can direct and indirect inguinal hernias be differentiated?
Indirect: lateral to inferior epigastric vessels
Direct: medial to inferior epigastric vessels (found in Hesselbach’s triangle)
What 2 vessels supply blood and remove to anterior abdominal wall?
- Superior epigastric (terminal branches of internal thoracic )
- Inferior epigastric (branches of external iliacs)
What is significant about inferior and superior epigastric vessels?
(Form anastomoses)
Arteries: bypass blocked descending aorta
Veins: Bypass blocked vena cava
What 8 structures lie on transpyloric plane?
- 9th costal cartilage
- L1 vertebra
- 1st part duodenum
- Pylorus of stomach
- Pancreatic neck
- Hilus of kidney
- Neck of pancreas
- Fundus of gallbladder
What 5 structures lie on subcostal plane?
- L3 vertebra
- 3rd part duodenum
- 10th costal cartilage
- Pancreatic head
- Inferior mesenteric artery
What 2 structures lie on interiliac plane?
- L4 vertebra
2. Bifurcation of aorta
Where is liver located?
- Right side to left mid clavicular
2. Extends from top of diaphragm to costal margin (on right)
Where is gall bladder located?
- On right, inferior margin of liver
2. Fundus located at tip of right 9th costal cartilage on transpyloric plane
Where is spleen located?
- Posterolateral left side
- Between ribs 9 and 11
- Parallel to 10th rib (superior to inferior: runs medial to lateral)
Where are kidneys located?
- Left superior pole: 10th intercostal space
- Right superior pole: 11th intercostal space
- Hilus: L1 (transpyloric plane)
Where is stomach located?
- Esophageal hiatus: T10 along midline
2. Pylorus: transpyloric plane (L1)
Where is duodenum located?
- 1st part: L1 (transpyloric plane)
- 2nd part: L2
- 3rd part: L3 (subcostal plane)
- 4th part: L2
Where is pancreas located?
- Head: right of midline between transpyloric and subcostal lines
- Neck: on midline on transpyloric plane
- Tail: extends superolateral (left) toward spleen
Where are intestinal landmarks?
- Hepatic flexure: below liver lying along costal margin
- Splenic flexure: deep to rib cage; below spleen
- Ileocecal junction: along right iliac fossa (along iliac crest)