A nurse is caring for a client who develops the rhythm below. The client is unresponsive, pulseless, and apneic. Which of the following actions should the nurse expect to do first?

A) Infuse lipoproteins to restore the myelin sheath:
Multiple sclerosis (MS) is an autoimmune disease where the immune system attacks the myelin sheath around nerve fibers. Plasmapheresis does not work by infusing lipoproteins to restore the myelin sheath. The treatment's primary goal is to remove harmful substances from the blood that may be contributing to the autoimmune attack, particularly antibodies that target the nervous system, not by restoring the myelin itself.

B) Remove excess fluid from the bloodstream:
Plasmapheresis is a process used to remove certain substances from the plasma, including antibodies and immune complexes that might be exacerbating an autoimmune condition like MS. If the goal were to remove excess fluid, the treatment would be more akin to dialysis or a fluid management procedure, but this is not the case with plasmapheresis.

C) Restore protein levels in the blood:
While plasmapheresis can sometimes lead to a temporary decrease in protein levels due to the removal of plasma, this is not its primary purpose. The primary goal of plasmapheresis in the context of multiple sclerosis is to remove circulating antibodies and other immune-related substances.

D) Remove circulating antibodies from the bloodstream:
Plasmapheresis works by removing circulating antibodies from the bloodstream. In multiple sclerosis, the immune system mistakenly targets the myelin sheath, and plasmapheresis helps to remove the antibodies responsible for this autoimmune response. This can provide temporary relief of symptoms during acute flare-ups of MS by reducing the immune system's attack on the nervous system.

A. 250 mg:

This represents the amount of levodopa in the tablet, not carbidopa. Sinemet contains two active ingredients: carbidopa (25 mg) and levodopa (250 mg), as shown on the label.

B. 25 mg:

This is the correct answer, as the label indicates that each tablet contains 25 mg of carbidopa. Carbidopa is combined with levodopa to improve its effectiveness and reduce side effects like nausea.

C. 5 mg:

This is not accurate; the label clearly states that the carbidopa dose is 25 mg per tablet.

D. 200 mg:

This does not correspond to the dose of carbidopa or levodopa in this medication. The label specifies 25 mg of carbidopa and 250 mg of levodopa.