The antiglobulin test may be omitted from the serological crossmatch if the patient's antibody screen is negative and there is no history of detection of unexpected antibodies.
Blood Bank
What must be true for the antiglobulin phase of the serologic crossmatch to be omitted (i.e., immediate spin crossmatch is done)? Please select all correct answers

A. The antibody screen must be negative.

B. The patient has not been transfused within the past 24 hours.

C. There is no history of detection of unexpected antibodies

D. The blood is needed for surgery

A young man is experiencing difficult breathing after fainting. The physician orders a blood gas analysis which shows the following results:
pH = 7.25
pCO2 = 62 mmHg
pO2 = 70 mmHg
HCO3 = 23 mEq/L
Which condition is most likely afflicting this patient?

A. metabolic alkalosis

B. metabolic acidosis

C. respiratory alkalosis

D. respiratory acidosis

First, determine the number of WBC's from the hemocytometer as follows:
WBC count = (dilution ratio x # of cells counted x 10) / (# mm2 area counted)
Then: WBC count = (20 x 100 x 10) / (8) = 2500 WBC/mm3 (or 2500 WBC/uL or 2.5 x 103 WBC/uL)
Next, to find the WBC count per liter, multiply the WBC count/uL by the number of uL/L (there are 106 uL/L)
So: (2.5 x 103 WBC/uL) x (106 uL/L) = 2.5 x 109 WBC/L
Hematology
A 1:20 dilution is made for a manual WBC count. The four corner squares on both sides of a hemocytometer are counted. A TOTAL of 100 cells are counted in that area. What is the white blood cell count in terms of a liter (? x 10^9/L)?

A. 2.5

B. 25

C. 250

D. 2500

E. 25000

Although cysteine-blood agar was traditionally used, F. tularensis will also grow on commercially available Thayer-Martin and chocolate agar which have been enriched with supplemental nutrients.
Which of the following media would you use to isolate Francisella tularensis:

A. Sheep-blood agar

B. Lowenstein-Jensen media

C. Bordet-Gengou media

D. Cysteine-blood agar

The morphologic characteristic(s) associated with the Chediak-Higashi syndrome is (are):

A. Pale blue cytoplasmic inclusions

B. Giant lysosomal granules

C. Neutrophils with many small granules and vacuoles

D. Nuclear hypo-segmentation

Kell, Kidd, and Duffy are usually warm reacting IgG antibodies. The most common P system antibody is anti-P1, which is a frequently naturally occurring low titer IgM antibody, seen in most P2 individuals.
Blood bank
Which of the following blood groups is most frequently associated with cold agglutinins:

A. Kell

B. Kidd

C. Duffy

D. P

The term affinity refers to the strength of attraction between a single antigenic determinant and a corresponding antigen binding site. The term avidity refers to the total strength of the attraction between an antibody and a multivalent antigen. The reaction between an IgM molecule (which has 10 antigen binding sites), and a multivalent antigen is therefore much stronger than that of an IgG antibody (which has only 2 antigen binding sites).
Avidity is best described by which of the following statements:

A. The strength with which red cells agglutinate

B. The strength with which multivalent antigens and antibodies bind

C. The strength with which univalent antigens and antibodies bind

D. The speed with which an antigen-antibody reaction occurs

Which of the following agencies administers the certification test that you will be eligible to take at the end of your 4 semester?

A. ASCP

B. AAMA

C. ASPT

D. AARP

HbsAg is positive in acute and chronic Hepatitis B infections, since the antigen is found on the actual surface of the virus. HbeAg is present in the blood when the hepatitis B viruses are replicating, indicating an active infection. Anti-Hbc IgM is present due to the immune response to the presence of the hepatitis core antigen and indicates an acute infection.
Anti-HBs is generally interpreted as indicating recovery and immunity from hepatitis B virus infection, according to the CDC.
Given the following results, what is the immune status of the patient?
HbsAg: positive
HbeAg: positive
Anti-HBc IgM: positive
Anti-HBs: negative

A. acute infection

B. chronic infection

C. immunization

D. susceptible

To obtain a serum sample for a stat test on a patient receiving anticoagulant therapy, the recommended tube is:

A. yellow/gray or orange

B. red

C. light green

D. red/gray or gold

Transport media are required for throat culture swabs but not for rapid strep tests.

A. True

B. False

The role of the point-of-care testing (POCT) compared with in-laboratory testing is the

A. Specific microscopic tests (wet mounts) performed by a physician for his or her own patients

B. Process of performin laboratory testing at the bedside of the patient and a means of decentralizing some of the laboratory testing

C. Means by which quality control between laboratories is maintained

D. Continuation of the process of evaluating and monitoring all aspects of the laboratory to ensure accuracy of test results