Falciform Ligament

The falciform ligament is a sickle-shaped or triangular fold of peritoneum that affixes the liver to the anterior abdominal wall and the diaphragm (Fig. 7-1). When air collects anteriorly abutting both sides of the ligament, it can be visualized as a vertical paramedian line curving

Table 7—1. Supine film signs of pneumoperitoneum

A. Depiction of ligaments protruding into the peritoneal cavity

Falciform ligament Ligamentum teres

Medial umbilical folds, inverted V sign Urachus

B. Visualization of peritoneal surface of abdominal organs

Rigler's sign Triangle sign Hepatic edge Hepatic notch Gallbladder

C. Detection of free air confined in specific peritoneal recesses

Cupola sign

Diaphragm muscle slip sign, leaping dolphins sign

Ligamentum teres fissure sign

Morison's pouch air (doge's cap sign)

Football sign

Lesser sac gas

Left upper quadrant gas

Pneumoscrotum

D. Recognition of free air superimposed on the liver shadow

Lucent liver

Anterior superior bubble Ill-defined pereiduodenal lucency slightly to the right, directed inferiorly toward the umbilicus (Figs. 7-2 through 7-7). The falciform ligament varies in thickness from 1-15 mm. It usually has a thin edge superiorly but may have a bulbous caudal end (Figs. 7-5 through 7-7). The attachment of the upper portion of the falciform ligament to the anterior surface of the liver extending from the ligamentum teres notch cau-dally to the diaphragm superomedially may be also delineated by air (Figs. 7-7 and 7-8).

Essentials of Human Physiology

Essentials of Human Physiology

This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.

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