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The increase in the level of serum enzymes used to detect cholestatic liver disease
is caused mainly by
enzyme release from dead cells.
Which of the following antigens has the highest frequency in caucasians?
An APTT is performed on a patient and the result is 50 seconds (reference range27-37). The instrument flags the result because of a delta check failure. Thepatient’s APTT the day before was 35 seconds. The technologist calls thenursing unit to check if the patient is on heparin therapy. The patient is not
receiving heparin. What is the next appropriate step?
Check to see if the patient has received any other anti-coagulant medications.
Which of the following conditions is most commonly associated with an elevated level of total protein?
Short gram neg rod, causes cystic fibrosis, oxidase neg, lavender green pigment Motility : + DNase: + glucose: + (oxidative) Maltose: + lysine decarboxylase: + esculin
n a nonmyocardial as opposed to a myocardial cause of an increased serum or plasma
CK-MB, which would be expected?
an increase in CK-MB that is persistent
An initial and repeat ELISA test for antibodies to HIV-1 are both positive. A
Western blot shows a single band at gp160.The patient shows no clinical signs
of HIV infection and the patient's TH cell count is normal. Based upon these
results, which conclusion is correct?
The results are inconclusive
Which of the statements below
regarding the diagnosis of pancreatitis is correct?
Diagnostic sensitivity is increased by assaying both lipase and amylase
The results of chemistry tests
Na: 138mmol/L; K: 4.2mmol/L; Cl:
94mmol/L; TCO2: 20mmol/L; glucose: 100mg/dL; T bili: 1.2mg/dL; BUN:
6.8mg/dL; creat.: 1.0mg/dL; albumin: 4.9g/dL; T protein: 5.1g/dL
What should be done next?
Repeat total protein
Fever, abdominal cramping, watery
stool, and fluid and electrolyte loss preceded by bloody stools 2-3 days before
is characteristic of shigellosis, but may also result from infections with:
In a cold autoadsorption
procedure, pretreatment of patient red cells with which of the following
reagent is helpful?
of the HACEK group of bacteria include:
requirement of 5%-10% CO2 for growth.
When performing a factor IX activity assay, a patient's plasma is mixed with:
Factor IX deficient plasma
What is the purpose of the complement split products C3a and C5a?
- to cause increased vascular permeability, contraction of smooth muscle, and the
- release of histamine from basophils
When performing platelet aggregation studies, which set of platelet aggregation
results would most likely be associated with Glanzmann's thrombasthenia?
- normal platelet aggregation with ristocetin; decreased aggregation with collagen, ADP,
- and epinephrine
Select the reagent needed in the coupling enzyme reaction used to generate a colored
product in the cholesterol oxidase method for cholesterol.
phenol (such as p-hydroxybenzenesulfonate)
3-year-old male was admitted to the hospital with scattered petechiae and
epistaxis. The patient had normal growth and no other medical problems except
for chicken pox three weeks earlier. His family history was unremarkable. His
PT: 11 sec. (10-13) platelet count: 18,000/uL (150-450 x 103/uL)
APTT: 32 sec. (28-37) bleeding time: 21 min. (2-8 min.)
The clinical manifestations and laboratory results are consistent with:
58-year-old female chemotherapy patient received two units of PRBCs. The
patient died three days later and the report from the autopsy revealed that her
death was due to septic shock. The bags were cultured and the following results
Aerobic gram negative rods on Blood and MacConkey
neg Sucrose :
What is the most likely identification?
What is the correct procedure upon receipt of a test request for hCG on the serum
from a 60-year-old man?
Perform the test; hCG may be seen in germ cell tumors
A patient deficient in the complement component C3 would be capable of which
type ! and VI
transplant patient began to show signs of rejection eight days after the receipt of a
kidney, and the kidney was removed. What immune elements might be found in the
Tcells and macrophages
When performing a mixing study, the patient's APTT is corrected from 60 sec. to 45
sec. (reference range 21-35 sec.). What is the most appropriate interpretation of these results?
The APTT is considered uncorrected
A 60-year-old patient was admitted to the hospital at 7:00AM for a liver biopsy.
The biopsy was scheduled for 11:00AM. The coagulation results performed with
the admission work showed a PT of 65 seconds with an INR of 4.5. What is the
most appropriate course of action?
Cancel the procedure and start the patient on vitamin K therapy.
A cord blood typing appears to be AB Rh positive with a 2+ DAT. The baby is
normal and the mother's type is O Rh negative. Is there a problem?
- A problem exists because an AB baby is not possible with an O mother; wash the
- cells and retype. Perform a negative control for the DAT.
What is the crossmatching protocol for platelets and plasma?
No crossmatching is required
In fluorometry, the excitation
wavelength is ___________the emission wavelength
The most noted differences between P.aeruginosa and S.maltophilia are:
- oxidase, 42oC growth,
- and polar tuft of flagella.