T Flashcards
Hernia
Hernias are abnormal protrusions of a viscus (or part of it) through a weak normal or abnormal opening in a cavity that involves it, e.g., the abdomen.
Factors leading to hernia include:
Increased pressure, e.g., from lifting heavy weights, constipation, pregnancy, etc.
• Weakness in the walls of the cavity, e.g., due to aging, congenital diseases like Marfan syndrome and Ehlor-Danlos syndrome (both connective tissue diseases), trauma, surgery, etc.
Types of hernia: in general
Types of hernia :(location)
Congenital and Acquired
Umbilical, paraumbilical, Spigelian, epigastric, lumbar, inguinal (most common), incisional, femoral.
extending between the deep inguinal ring and superficial inguinal rings
Inguinal canal
deep inguinal ring (a hole in the transversalis fascia) and superficial inguinal rings (a hole in the aponeurosis of the external oblique)
is an oval opening in the fascia transversalis.
It is the beginning of the inguinal canal and is at a point midway between the ASIS and the pubic symphysis; it is just above the inguinal ligament and immediately lateral to the inferior epigastric vessels.
Deep inguinal ring
inguinal ring is a triangular (with the apex pointing above and the base being below)
defect in the EOA immediately above and medial to the pubic tubercle, and is composed of medial and lateral crus joined together by intercrural fibers.
Superficial inguinal ring
lie just medial to the deep inguinal ring
Inferior epigastric vessels
The inferior epigastric vessels lie just medial to the deep inguinal ring, passing from the iliac vessels to rectus abdominis
they’re used as a landmark to classify inguinal hernia types
The inguinal canal contains
the spermatic cord in males and the round ligament in females (and it also contains the ilioinguinal nerve, L1)
During development, independently from descent of the testis, the peritoneum of the abdominal cavity forms an evagination,, on each side of the midline into the ventral abdominal wall.
called the processus vaginalis,
Inguinal hernias can be categorized into two types These two basic types are fundamentally different
anatomy, causation and complications.
deep inguinal ring
This type is more common.
congenital inguinal hernia
the processes vaginalis should obliterate under hormonal control
Inguinal hernia in neonates and young children
muscles around the deep inguinal ring can prevent a hernia from developing until later in life, when, under the constant positive abdominal pressure, the deep inguinal ring and muscles are stretched and a hernia becomes apparent
oblique in its path
Indirect inguinal hernia
weakness in the posterior wall of the canal, termed Hesselbach’s triangle
Direct inguinal hernia
medial to the inferior epigastric vessels
acquired
stretching and weakening of the abdominal wall just medial to the inferior epigastric (IE) vessels.
is more likely in elderly patients
broadly based and therefore unlikely to strangulate.
Direct inguinal hernia
the names “indirect” and “direct” come from how the hernia is
Reduced