Femoral canal

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Femoral canal
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Femoral sheath laid open to show its three compartments. (The femoral canal is both visible and labeled [difficult to see label] medial to the femoral vein.)
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Structures passing behind the inguinal ligament. The entrance to the femoral canal, the femoral ring, is labeled at right.
Details
Artery Femoral artery
Vein Femoral vein, external iliac vein
Nerve Femoral nerve, genitofemoral nerve
Identifiers
Latin canalis femoralis
TA98 A04.7.03.012
TA2 2698
FMA 22405
Anatomical terminology

The femoral canal is the medial (and smallest) compartment of the three compartments of the femoral sheath. It is conical in shape. The femoral canal contains lymphatic vessels, and adipose and loose connective tissue, as well as - sometimes - a deep inguinal lymph node. The function of the femoral canal is to accommodate the distension of the femoral vein when venous return from the leg is increased or temporarily restricted (e.g. during a Valsalva maneuver). [1]

Contents

The proximal, abdominal end of the femoral canal forms the femoral ring. [1]

The femoral canal should not be confused with the nearby adductor canal.

Anatomy

The femoral canal is bordered:

Video of relevant anatomy

Physiological significance

The position of the femoral canal medially to the femoral vein is of physiologic importance. The space of the canal allows for the expansion of the femoral vein when venous return from the lower limbs is increased or when increased intra-abdominal pressure (Valsalva maneuver) causes a temporary stasis in the venous flow.

Clinical significance

The entrance to the femoral canal is the femoral ring, through which bowel can sometimes enter, causing a femoral hernia. Though femoral hernias are rare, their passage through the inflexible femoral ring puts them at particular risk of strangulation, giving them surgical priority.

See also

Related Research Articles

<span class="mw-page-title-main">Hernia</span> Abnormal exit of tissues or organs from the cavity they usually reside in

A hernia is the abnormal exit of tissue or an organ, such as the bowel, through the wall of the cavity in which it normally resides. The term is also used for the normal development of the intestinal tract, referring to the retraction of the intestine from the extra-embryonal navel coelom into the abdomen in the healthy embryo at about 7½ weeks.

<span class="mw-page-title-main">Femoral artery</span> Large artery in the thigh

The femoral artery is a large artery in the thigh and the main arterial supply to the thigh and leg. The femoral artery gives off the deep femoral artery and descends along the anteromedial part of the thigh in the femoral triangle. It enters and passes through the adductor canal, and becomes the popliteal artery as it passes through the adductor hiatus in the adductor magnus near the junction of the middle and distal thirds of the thigh.

<span class="mw-page-title-main">Femoral triangle</span> Anatomical region of the thigh

The femoral triangle is an anatomical region of the upper third of the thigh. It is a subfascial space which appears as a triangular depression below the inguinal ligament when the thigh is flexed, abducted and laterally rotated.

<span class="mw-page-title-main">Inguinal canal</span> Human abdominal anatomy

The inguinal canal is a passage in the anterior abdominal wall on each side of the body, which in males, convey the spermatic cords and in females, the round ligament of the uterus. The inguinal canals are larger and more prominent in males.

<span class="mw-page-title-main">Genitofemoral nerve</span>

The genitofemoral nerve is a mixed branch of the lumbar plexus derived from anterior rami of L1-L2. It splits a genital branch and a femoral branch. It provides sensory innervation to the upper anterior thigh, as well as the skin of the anterior scrotum in males and mons pubis in females. It also provides motor innervation to the cremaster muscle.

<span class="mw-page-title-main">Inguinal hernia</span> Medical condition in which contents of the abdominal cavity protrude through the inguinal canal

An inguinal hernia or groin hernia is a hernia (protrusion) of abdominal cavity contents through the inguinal canal. Symptoms, which may include pain or discomfort especially with or following coughing, exercise, or bowel movements, are absent in about a third of patients. Symptoms often get worse throughout the day and improve when lying down. A bulging area may occur that becomes larger when bearing down. Inguinal hernias occur more often on the right than left side. The main concern is strangulation, where the blood supply to part of the intestine is blocked. This usually produces severe pain and tenderness of the area.

<span class="mw-page-title-main">Groin</span> The two creases at the junction of the torso with the thighs, on either side of the pubic area

In human anatomy, the groin, also known as the inguinal region or iliac region, is the junctional area between the torso and the thigh. The groin is at the front of the body on either side of the pubic tubercle, where the lower part of the abdominal wall meets the thigh. A fold or crease is formed at this junction known as the inguinal groove, or crease. This is also the area of the medial compartment of the thigh that contains attachments of the adductor muscles of the hip or the groin muscles. The groin is the common site for a hernia.

<span class="mw-page-title-main">Inguinal ligament</span> Band running from the pubic tubercle to the anterior superior iliac spine

The inguinal ligament, also known as Poupart's ligament or groin ligament, is a band running from the pubic tubercle to the anterior superior iliac spine. It forms the base of the inguinal canal through which an indirect inguinal hernia may develop.

<span class="mw-page-title-main">Inferior epigastric artery</span> Blood vessel

In human anatomy, the inferior epigastric artery is an artery that arises from the external iliac artery. It is accompanied by the inferior epigastric vein; inferiorly, these two inferior epigastric vessels together travel within the lateral umbilical fold The inferior epigastric artery then traverses the arcuate line of rectus sheath to enter the rectus sheath, then anastomoses with the superior epigastric artery within the rectus sheath.

<span class="mw-page-title-main">Lumbar plexus</span> Web of nerves in the lower spine

The lumbar plexus is a web of nerves in the lumbar region of the body which forms part of the larger lumbosacral plexus. It is formed by the divisions of the first four lumbar nerves (L1-L4) and from contributions of the subcostal nerve (T12), which is the last thoracic nerve. Additionally, the ventral rami of the fourth lumbar nerve pass communicating branches, the lumbosacral trunk, to the sacral plexus. The nerves of the lumbar plexus pass in front of the hip joint and mainly support the anterior part of the thigh.

<span class="mw-page-title-main">Conjoint tendon</span> Medial part of the posterior wall of the inguinal canal

The conjoint tendon is a sheath of connective tissue formed from the lower part of the common aponeurosis of the abdominal internal oblique muscle and the transversus abdominis muscle, joining the muscle to the pelvis. It forms the medial part of the posterior wall of the inguinal canal.

In human anatomy, the inguinal region refers to either the groin or the lower lateral regions of the abdomen. It may also refer to:

Femoral hernias occur just below the inguinal ligament, when abdominal contents pass through a naturally occurring weakness in the abdominal wall called the femoral canal. Femoral hernias are a relatively uncommon type, accounting for only 3% of all hernias. While femoral hernias can occur in both males and females, almost all develop in women due to the increased width of the female pelvis. Femoral hernias are more common in adults than in children. Those that do occur in children are more likely to be associated with a connective tissue disorder or with conditions that increase intra-abdominal pressure. Seventy percent of pediatric cases of femoral hernias occur in infants under the age of one.

<span class="mw-page-title-main">Transversalis fascia</span> Aponeurosis between the transverse abdominal muscle and the extraperitoneal fat

The transversalis fascia is the fascial lining of the anterolateral abdominal wall situated between the inner surface of the transverse abdominal muscle, and the preperitoneal fascia. It is directly continuous with the iliac fascia, the internal spermatic fascia, and pelvic fascia.

<span class="mw-page-title-main">Femoral ring</span> Base of the femoral canal

The femoral ring is the opening at the proximal, abdominal end of the femoral canal, and represents the base of the conically-shaped femoral canal. The femoral ring is oval-shaped, with its long diameter being directed transversely and measuring about 1.25 cm. The opening of the femoral ring is filled in by extraperitoneal fat, forming the femoral septum.

<span class="mw-page-title-main">Femoral sheath</span> Anatomical structure of the upper thigh

The femoral sheath is a funnel-shaped downward extension of abdominal fascia within which the femoral artery and femoral vein pass between the abdomen and the thigh. The femoral sheath is subdivided by two vertical partitions to form three compartments ; the medial compartment is known as the femoral canal and contains lymphatic vessels and a lymph node, whereas the intermediate canal and the lateral canal accommodate the femoral vein and the femoral artery (respectively). Some neurovascular structures perforate the femoral sheath. Topographically, the femoral sheath is contained within the femoral triangle.

<span class="mw-page-title-main">Lacunar ligament</span>

The lacunar ligament, also named Gimbernat's ligament, is a ligament in the inguinal region. It connects the inguinal ligament to the pectineal ligament, near the point where they both insert on the pubic tubercle.

<span class="mw-page-title-main">Pectineal ligament</span>

The pectineal ligament, sometimes known as the inguinal ligament of Cooper, is an extension of the lacunar ligament. It runs on the pectineal line of the pubic bone. The pectineal ligament is the posterior border of the femoral ring.

<span class="mw-page-title-main">Pampiniform plexus</span> Vein network in humans

The pampiniform plexus is a venous plexus – a network of many small veins found in the human male spermatic cord, and the suspensory ligament of the ovary. In the male, it is formed by the union of multiple testicular veins from the back of the testis and tributaries from the epididymis.

The vascular lacuna is the medial compartment beneath the inguinal ligament. It is separated from the lateral muscular lacuna by the iliopectineal arch. It gives passage to the femoral vessels, lymph vessels and lymph nodes.

References

  1. 1 2 Moore, Keith L. (2018). Clinically Oriented Anatomy. A. M. R. Agur, Arthur F., II Dalley (8th ed.). Philadelphia. pp. 711–713. ISBN   978-1-4963-4721-3. OCLC   978362025.{{cite book}}: CS1 maint: location missing publisher (link)

PD-icon.svgThis article incorporates text in the public domain from page 625 of the 20th edition of Gray's Anatomy (1918)