Chapter 8 Spleen Flashcards
What projects from the splenic capsule and divides the spleen into several compartments
Trabeculae
What anatomy is located on the anterior border of the spleen
Stomach
In the spleen, what structure is made up of lymph tissues arranged around the splenic arteriole
White pulp
What is the spleen’s function in the embryological stage of development
Hematopoiesis
What is the principle site of filtration within the spleen
Red pulp
What splenic function removes iron and other substances from erythrocytes
Pitting
Which position is best for scanning the normal adult spleen
Right lateral decubitus
Which ligament attaches the spleen to the greater curvature of the stomach
Gastrosplenic
What term describes the echogenicity of the normal splenic parenchyma when compared to the liver
Isoechoic
When is the spleen considered to be enlarged
The length exceeds 13 cm
What is ruled out when the sonographer demonstrates the spleen
Asplenia
What is the normal sonographic appearance of splenic parenchyma
Homogenous
Leukopenia may result from what condition
Anaphylactic shock
On a longitudinal section, where is the extension of the superior splenic component located compared to the inferior componenet
Medial
What may be demonstrated in the spleen, liver, kidneys, and adrenal glands in patients with extrapulmonary pneumocystis carinii secondary to AIDS
Calcifications
What process contributes to an acquired aplasia and hypoplasia
Repeated infarction
Red blood cell; contains hemoglobin
Erythrocyte
Process of red blood cell production
Erythropoiesis
Lab value of the percentage of blood volume made up of red blood cells
Hematocrit
Tissue death caused by an interruption of the blood suply
Infarct
White blood cell; protects and fights against infection in the body
Leukocytosis
Decreased white blood cell count, possibly the result of viral infection or leukemia
Leukopenia
Process used by the red pulp to destroy old red blood cells
Phagocytosis
The splenic artery branches off which artery to supply blood to the spleen
Celiac axis
A wandering spleen is at an increased risk of acquiring which of the following conditions
Torsion and infarction
Leukocytosis is the typical response to which of the following coniditions
Bacterial infection
What is leukopenia
Frequently a side effect of chemotherapy
What is the most common sonographically visualized abnormality of the spleen
Splenomegaly
What is the most common cause of splenomegaly
Portal hypertension
Splenic calcifications usually result from which disease
Angiosarcomas
What may cause a small shrunken spleen
Portal hypertension
