Author Question: The nurse reviews the patient's lab values and determines warfarin therapy is at therapeutic levels ... (Read 19 times)

sheilaspns · **on:** Jul 23, 2018

The nurse reviews the patient's lab values and determines warfarin therapy is at therapeutic levels with what lab result?

A) Partial thromboplastin time (PTT) 1.5 to 2.5 times the control
B) Prothrombin time (PT) 1.3 to 1.5 times the control
C) International normalized ratio (INR) of 3 to 4
D) Activated partial thromboplastin time (aPTT) 3 to 4 times the control

Question 2

While discussing the central nervous system (CNS), the nursing instructor tells the students that the major inhibitory neurotransmitter in the CNS is what?

A) Acetylcholine
B) Dopamine
C) Gamma-aminobutyric acid (GABA)
D) Serotonin

abro1885 · **Reply #1 on:** Jul 23, 2018

Answer to Question 1

B
Feedback:
Warfarin is at therapeutic level when the INR is 2 to 3.5 and the PT is 1.3 to 1.5 times control. PTT and aPTT should be 1.5 to 2.5 to indicate heparin dosage is at therapeutic level.

Answer to Question 2

C
Feedback:
GABA, which is found in the brain, inhibits nerve activity and is important in preventing overexcitability or stimulation such as seizure activity. Acetylcholine, which communicates between nerves and muscles, is also important as the preganglionic neurotransmitter throughout the autonomic nervous system and as the postganglionic neurotransmitter in the parasympathetic nervous system and in several pathways in the brain. Dopamine is involved in the coordination of impulses and responses, both motor and intellectual. Acetylcholine, dopamine, and serotonin are not the major inhibitory neurotransmitter in the CNS. Serotonin is important in arousal and sleep.