Lachmans Abdomen Flashcards
(76 cards)
What characteristics distinguish an indirect inguinal hernia from a direct inguinal hernia?
Indirect inguinal hernia passes through the deep inguinal ring, lateral to the inferior epigastric artery, covered by all three layers of the spermatic fascia after it exits from the superfi cial ring
Direct inguinal hernia does not But passes through the inguinal (Hesselbach’s) triangle, Medial to epigastric Artery, Covered by external spermatic fascia
Both types of inguinal hernias emerge through the
superficial inguinal ring
What is the cremaster muscle? What does it do, and where does it come from?
The cremaster muscle is an evagination of the internal oblique muscle which becomes part of the covering of the spermatic cord. Contraction of the cremaster muscle causes elevation of the spermatic cord and the testis, pulling them closer to the body cavity. the function of the cremaster is to regulate the temperature of the testis by pulling it closer to the body cavity when in a cold environment and lowering if farther from the body cavity when in a warm environment.
What makes up the Cremaster muscle?
Internal oblique and spermatic cord
What is a strangulated hernia?
Hernia where the blood supply to the herniated viscus becomes impaired or occluded, compromising the organ.
If a strangulated hernia is left untreated?
This leads to necrosis of the organ.
A strangulated hernia is a surgical emergency.
What is the processus vaginalis?
An evagination of the parietal peritoneum of the anterior abdominal wall that descends through the inguinal canal into the scrotum.
What is the processus vaginalis, and how is it related to indirect inguinal hernia?
the processus vaginalis is an evagination of the parietal peritoneum of the anterior abdominal wall that descends through the inguinal canal into the scrotum. the processus vaginalis forms during fetal life and descends through the canal before the testis descends. Normally, the proximal part of the processus vaginalis fuses and degenerates, leaving the distal part covering the testis in the scrotum. h is distal remnant is called the tunica vaginalis. If the proximal part of the processus does not fuse and degenerate, it leaves an open pathway between the peritoneal cavity and the scrotum, predisposing the individual for indirect inguinal hernia. (230–231)the
What landmark is used to identify the cystic artery when per- forming a cholecystectomy?
Cystic artery is found in the cystohepatic triangle (of Calot). this triangle is formed by the cystic duct, the hepatic ducts, and the border of the liver. the cystic artery is most commonly a branch of the right hepatic artery
What is the anatomical basis for the fact that pain from an infl amed gall bladder sometimes is referred to the right neck and shoulder region?
Inflamed gall bladder can be in contact with/ cause inflammation of, the undersurface of the diaphragm.
Diaphragm - receives sensory innervation from the right phrenic nerve.
Because the phrenic nerve arises from spinal nerve levels C3, C4, and C5, pain can be referred to?
Neck and shoulder region
What is the coronary ligament of the liver?
reflection of peritoneum from the visceral peritoneum of the liver to the parietal peritoneum on the diaphragm.
What is the portal triad, and where is it located?
Common bile duct, proper hepatic artery, portal vein
The portal triad run together in … the right edge of ____
hepatoduodenal ligament, Lesser Omentum
What is the arrangment of the Common Bile, Proper Hep, and Portal V?
Common bile duct is anterior and to the right
Proper hepatic artery anterior and to the left
Portal vein is posterior to the other two structures
In which part of the digestive system do bile and pancreatic enzymes mix with food?
Bile and pancreatic secretions enter the digestive tract in the second part of the duodenum.
The minor pancreatic duct opens independently ____ Proximal to the___. Food enters the duodenum from the stomach when the pyloric sphincter opens to allow the passage of food
Independently into the second part of the duodenum,
proximal to the ampulla.
Food enters the duodenum from the stomach when ???
Pyloric sphincter opens
What is the greater omentum, and from what embryonic structure is it derived?
Derived from the dorsal mesogastrium (In embryo)
Omentum becomes elongated during the rotation of
the foregut.
Greater omentum is attached to the greater curvature of the stomach, the original dorsal side of the embryonic stomach. The very elongated greater omentum folds upon itself and is draped in front of many of the other abdominal organs.
What is the lesser omentum, and what are its two parts?
derived from the ventral mesentery of the embry
Hepatogastric and HepatoDuodnal
The hepatoduodenal ligament is quite thick and contains the ____ along with its associated nerve plexus and connective tissue (What is this made of?)
Portal Triad
- Common bile duct, proper hepatic artery, portal vein
What is the duodenojejunal flexure?
Point at which the duodenum ends and the jejunum begins.
What happens at the duodenojejunal flexure?
duodenum emerges from its retroperitoneal position and gains a mesentery to become the jejunum.
The duodenojejunal junction is attached to the right crus of the diaphragm by ??
The suspensory ligament of Treitz