A nurse is reporting a client’s laboratory tests to the provider to obtain a prescription for the client’s daily warfarin.
Which of the following laboratory tests should the nurse plan to report to obtain the prescription for the warfarin?
INR.
Fibrinogen level.
aPTT.
Platelet count.
The Correct Answer is A
Warfarin is a vitamin K antagonist that inhibits the synthesis of factors II, VII, IX, and X in the liver. These factors are part of the extrinsic and common pathways of coagulation, which are measured by the prothrombin time (PT) and the international normalized ratio (INR). The INR is a standardized way of reporting the PT that accounts for the variability of different reagents and instruments. The INR is used to monitor the therapeutic effect of warfarin and to adjust the dose accordingly. The target INR range depends on the indication for warfarin, but it is usually between 2 and 3 for most conditions.
Choice B is wrong because fibrinogen level is not affected by warfarin.
Fibrinogen is a precursor of fibrin, which forms the final step of the coagulation cascade.
Fibrinogen level can be decreased in conditions such as disseminated intravascular coagulation (DIC), liver disease, or severe bleeding.
Choice C is wrong because aPTT is not affected by warfarin.
aPTT measures the intrinsic and common pathways of coagulation, which are mainly dependent on factors VIII, IX, XI, and XII.
These factors are not inhibited by warfarin.
aPTT is used to monitor the effect of heparin, a direct antithrombin agent that inhibits thrombin and factor Xa.
Choice D is wrong because platelet count is not affected by warfarin.
Platelets are cell fragments that adhere to damaged blood vessels and form aggregates to initiate hemostasis.
Platelet count can be decreased in conditions such as immune thrombocytopenia (ITP), heparin-induced thrombocytopenia (HIT), or bone marrow suppression.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
This is because a cathartic suppository stimulates the nerve endings in the rectum, causing a contraction of the bowel and facilitating defecation. This is especially helpful for clients who have an upper motor neuron or areflexic bowel, which means they have lost the ability to feel when the rectum is full and have a tight anal sphincter muscle. A bowel program is a way of controlling or moving the bowels after a spinal cord injury, which may affect normal bowel function depending on the spinal level involved. A bowel program aims to achieve regular bowel movements, prevent constipation or impaction, and avoid accidents.
Choice A is wrong because encouraging a maximum fluid intake of 1,500 mL per day is not enough to prevent constipation and promote bowel health. A fluid intake of at least 2,000 mL per day is recommended for most adults.
Choice B is wrong because increasing the amount of refined grains in the client’s diet can worsen constipation and reduce stool bulk.
Refined grains are low in fiber, which is essential for normal bowel function. A high-fiber diet of at least 20 to 35 grams per day is advised for clients with spinal cord injuries.
Choice C is wrong because providing the client with a cold drink prior to defecation can have the opposite effect of stimulating the bowel.
Cold drinks can slow down the digestive process and reduce peristalsis, which is the movement of food through the intestines. Warm or hot drinks can help stimulate the bowel and increase peristalsis.
Correct Answer is C
Explanation
Having interdisciplinary team meetings for the client on a regular basis.
This action best promotes communication among staff caring for the client because it allows for consistent and coordinated care planning, information sharing, and goal setting for the client who has expressive aphasia and right hemiparesis following a stroke.
Choice A is wrong because posting swallowing precautions at the head of the client’s bed does not promote communication among staff, but rather informs them of the client’s risk of aspiration due to dysphagia, which is a common complication of stroke.
Choice B is wrong because noting changes in the treatment plan in the client’s medical record is a standard practice that does not necessarily enhance communication among staff, but rather documents the client’s progress and interventions.
Choice D is wrong because recording the client’s progress in the nurses’ notes is also a standard practice that does not necessarily enhance communication among staff, but rather provides a summary of the client’s status and care.
Expressive aphasia is an acquired language disorder that affects the ability to produce spoken or written language, while right hemiparesis is a weakness or partial paralysis of the right side of the body.
Both of these conditions are caused by damage to the left hemisphere of the brain, which is responsible for language and motor control of the right side of the body. Stroke and traumatic brain injury are common causes of left hemisphere damage
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