A patient's laboratory test results indicate prolonged activated partial thromboplastin time, which represents the time required for formation of a firm fibrin clot.In this case, the health-care provider suspects a vitamin deficiency may be contributing to this finding.The nurse knows that deficiency in which of the following vitamins is associated with this finding?
A)Vitamin C
B)Vitamin D
C)Vitamin E
D)Vitamin K

Question

Quizplus · Accepted Answer

Prolonged activated partial thromboplastin time (aPTT) is a sign of bleeding tendency due to inadequate clotting factor II, VII, IX, and X. Vitamin K deficiency can result in inadequate production and utilization of these clotting factors, leading to prolonged aPTT. Therefore, deficiency in vitamin K is associated with this finding. Vitamin C deficiency can cause scurvy, vitamin D deficiency can cause rickets, and vitamin E deficiency can cause neurological problems and anemia but do not affect clotting time.

A Patient's Laboratory Test Results Indicate Prolonged Activated Partial Thromboplastin