Deep inguinal ring
| Deep inguinal ring | |
|---|---|
 Front of abdomen, showing surface markings for arteries and inguinal canal (abdominal inguinal ring labeled at lower left) | |
| Details | |
| Identifiers | |
| Latin | Anulus inguinalis profundus |
| TA | A04.5.01.021 |
| FMA | 19927 |
The deep inguinal ring (internal or deep abdominal ring, abdominal inguinal ring, internal inguinal ring) is the entrance to the inguinal canal.
Location
The surface marking of the deep inguinal ring is classically described as half an inch above the midpoint of the inguinal ligament .[1]
However, the surface anatomy of the point is disputed. In a recent study[2] it was found to be in a region between the mid-inguinal point (situated midway between the anterior superior iliac spine and the pubic symphysis) and the midpoint of the inguinal ligament (i.e. midway between the anterior superior iliac spine and the pubic tubercle). Traditionally, either one of these 2 sites was claimed as its location. However, this claim is based upon the study's dissection of 52 cadavers, and may not reflect the live in vivo anatomy.
Some sources state that it is at the layer of the transversalis fascia.[3]
Shape
It is of an oval form, the long axis of the oval being vertical; it varies in size in different subjects, and is much larger in the male than in the female.
Boundaries
It is bounded, above and laterally, by the arched lower margin of the transversalis fascia; below and medially, by the inferior epigastric vessels.
Transmission
It transmits the spermatic cord in the male and the round ligament of the uterus in the female.
Extensions
From its circumference a thin funnel-shaped membrane, the infundibuliform fascia, is continued around the cord and testis, enclosing them in a distinct covering.
Additional images
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The abdominal inguinal ring.
-
The relations of the femoral and abdominal inguinal rings, seen from within the abdomen. Right side.
See also
References
This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)
- ↑ Susan Standring (2004). Gray's Anatomy: The Anatomical Basis of Medicine and Surgery. Churchill-Livingstone. p. 1098. ISBN 0-443-07168-3.
- ↑ Koliyadan S, Narayan G, Balasekran P (2004). "Surface marking of the deep inguinal ring". Clin Anat. 17 (7): 554–7. doi:10.1002/ca.10257. PMID 15376291.
- ↑ Kyung Won, PhD. Chung (2005). Gross Anatomy (Board Review). Hagerstown, MD: Lippincott Williams & Wilkins. p. 198. ISBN 0-7817-5309-0.
External links
- Anatomy figure: 36:01-03 at Human Anatomy Online, SUNY Downstate Medical Center - "The inguinal canal and derivation of the layers of the spermatic cord."
- Anatomy image:7362 at the SUNY Downstate Medical Center
- -261423027 at GPnotebook
- inguinalregion at The Anatomy Lesson by Wesley Norman (Georgetown University)
- Atlas image: abdo_wall65 at the University of Michigan Health System - "The Coverings of the Inguinal Canal, External & Internal Oblique & Transversus Abdominis Removed"
- The Inguinal Canal and Hernias (includes diagram at burrill.demon.co.uk)
