Chap 4 A&SS Flashcards
Cavity containing dead tissue and pus that forms from an infection
Abscess
Layers of fat fibrous sheets composed of strong connective tissue
Aponeurosis
Accumulation of serious fluid in peritoneal cavity
Ascites
Skin discoloration cause by the leakage of blood into the subcutaneous tissues
Ecchymosis
Redness of skin owing to inflammation
Erythema
Fibrous tissue network that is richly supplied by blood vessels and nerves located between the skin and underlying structures
Fascia
Fibrous structure that runs down the midline of the abdomen from the xyphoid process to the symphysis pubis separating the right and left rectus abdominis
Linea alba
Rhythmic wavelike contraction of the gastrointestinal tract that forces food through it
Peristalsis
Fluid accumulation in the pleural cavity
Pleural effusion
Fluid located superior to diaphragm
Pleural effusion
Fluid located inferior to diaphragm
Ascites
Collapsed lung that occurs when air leaks into the space between the chest wall and lung
Pneumothorax
Long, vertical, paired abdominal muscles that run from the xiphoid process to the symphysis pubis
Rectus abdominis
Fibrous connective tissue fascia that contains the rectus abdominis, pyramidalis muscle, blood and lymphatic vessels and nerves
Rectus sheath
Where does the anterior abdominal wall extend from?
The xyphoid process to the symphysis pubis
What is the anterior wall made of?
The skin layer, the subcutaneous layer, and a musculofascial layer
The anterolateral abdominal wall is made of…
The rectus abdominis, transverse, internal oblique and external oblique muscles
Why is sonography the modality of choice?
It is fast, widely available, inexpensive and noninvasive
What affects the abdominal wall and membranous lining?
Inflammatory, traumatic, and neoplastic changes
Name the four main indications of inflammatory response
Heat, redness, pain, and swelling
How does an abscess appear sonographically?
Anechoic or has internal echoes. irregular or smooth bordered, may have echogenic shadowing if it contains gas
When do hematomas usually occur?
Postsurgical or after trauma
What muscles typically develop hematomas?
Lateral or retroperitoneal muscles
How do hematomas appear sonographically?
Varies from hypoechoic to echogenic. Appearance will vary with each stage of resolution.