Which Statement About Lupus Anticoagulants (LAs) and Antiphospholipid (APL) Syndrome

question 40

Multiple Choice

Which statement about lupus anticoagulants (LAs) and antiphospholipid (aPL) syndrome is true?

• A) LAs are best detected by enzyme-linked immunosorbent assay (ELISA) for anticardiolipin (aCL) antibodies.
• B) All prolongations of the APTT are caused by LAs.
• C) The presence of either a positive ELISA for aCL or an LA is sufficient to label a patient as having aPL syndrome.
• D) aPL syndrome is associated only with arterial thrombosis.
• E) The term "LA" is inherently confusing, because although LAs prolong coagulation tests, they are known for their association with thrombotic disease, not bleeding.

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Definitions:

Cash Flows

The net amount of cash and cash-equivalents moving into and out of a business.

Today's Dollars

Today's Dollars refers to the value of money in terms of the present day's purchasing power, often used to account for inflation in financial calculations.

Profitability Index

A calculation that measures the ratio between the present value of future cash flows to the initial investment, used to assess the profitability of an investment.

IRR

The discount rate at which the net present value of all the cash flows from a project or investment equals zero.