This patient is most likely suffering from an immediate-acting coagulation inhibitor; most commonly, lupus anticoagulant. Notice that the addition of normal pooled plasma does not correct upon initial or incubated mix, which means that the inhibitor is not time or temperature-dependent.
Factor VIII is not the correct answer as a factor deficiency would have corrected upon the addition of normal pooled plasma. Factor VII is not the correct answer, as the aPTT assay does not account for factor VII activity or concentration.
The laboratorian completed the mixing study ordered for John Doe. The results are as follows:
Initial aPTT result: 167 seconds
Initial 1:1 Mix with Normal Pooled Plasma: 158 seconds
Incubated 1:1 Mix with Normal Pooled Plasma: 150 seconds
Which of the choices below would most likely explain the results for this patient?
The role of the laboratory supervisor or manager is to
he last choice in this question is false. Rocky mountain spotted fever is NOT geographically restricted to the Rocky mountain region. In fact, according to the CDC, this disease is widely distributed east of the Rocky Mountains and also occurs in limited areas on the Pacific Coast.
Which one of the following statements is false?
A regional laboratory that performs high volume, highly complex or infrequently ordered testing is a:
Chain-of-Custody procedures must be followed for
Failure to deliver glucose drawn in a serum separator tube (SST) to the laboratory within the recommended time will cause:
Question options:
The laboratory employee with an 2-year associate degree who performs clinical testing is the:
MCH is the average weight of hemoglobin in the average red blood cell. The value is expressed in picograms (10-12 grams).
Hematology
Hemoglobin (g/100ml) x 10 / RBC count (millions/mm3) is the formula for calculating:
Name the comprehensive written safety plan detailing the proper use and storage of hazardous chemicals in the workplace.
The most common specimen analyzed in the hematology section is:
Gram-positive bacteria retain the primary crystal violet stain that is applied in the Gram stain because of the cross-linking of the thick peptidoglycan layer in their cell walls. Their cell walls contain less lipids than that of a gram-negative bacteria, and this reduces the permeability of their cell wall to the organic solvents that are used as a decolorizer. When the counterstain is added, it may enter the gram-positive cell, but does not change the color of the cells.
A thick peptidoglycan is MOST often associated with which of the following types of bacteria?
Bacterial contamination of platelets is most likely because they are stored at room temperature.
Bacterial contamination is MOST likely in which of the following blood products?
Normal pH of semen must be a value equal to or greater than which of the following?
Cerebrospinal fluid has three main functions:
Protect brain and spinal cord from trauma.
Supply nutrients to nervous system tissue.
Remove waste products from cerebral metabolism.
Which of the following are functions of CSF? Please select all correct answers
The steps in the PCR process are:
1. Denaturation (Turning double stranded DNA into single strands.)
2. Annealing/Hybrization (Attachment of primers to the single DNA strands.)
3. Extension (Creating the complementary strand to produce new double stranded DNA.)
What is the first step of the PCR reaction?
