A nurse is caring for a client who has a suspected diagnosis of myasthenia gravis. The provider prescribes a Tensilon test. Which of the following findings indicates a positive test?

Muscle strength shows no change.

Muscle contractions become progressively stronger.

Electrical charge in a muscle increases in intensity.

A pill-rolling tremor appears.

Answer and Explanation

The Correct Answer is B

A.   If there is no change in muscle strength after the Tensilon test, it indicates a negative result for myasthenia gravis.
B.   Muscle contractions become progressively stronger is a positive result for myasthenia gravis. Tensilon temporarily improves muscle strength in patients with this condition.
C.   Electrical charge in a muscle increases in intensity is not a relevant parameter for the Tensilon test.
D.   A pill-rolling tremor appears is a symptom of Parkinson's disease, not myasthenia gravis.

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Correct Answer is D

Explanation

A. Heparin can be used to manage DIC but it's not a lifelong treatment and is part of a complex management plan.
B. DIC actually leads to a decreased platelet count due to excessive clotting.
C. DIC is an acquired condition, not a genetic one, and while vitamin K is involved in clotting, it's not the primary cause of DIC.
D. DIC is a complex disorder involving uncontrolled clotting and bleeding due to the depletion of clotting factors, including fibrinogen.

A. The P-R interval measures 0.22 seconds. B. The T wave is in the inverted position. C. The QRS duration is 0.20 seconds. D. The P wave falls before the QRS complex.

Correct Answer is D

Explanation

A. The normal P-R interval ranges from 0.12 to 0.20 seconds. A P-R interval longer than 0.20 seconds is considered prolonged and may indicate a first-degree AV block.
B. The T wave represents ventricular repolarization. Normally, the T wave is upright in most leads. An inverted T wave can indicate various conditions, including ischemia, electrolyte imbalances, or other abnormalities
C. The normal QRS duration ranges from 0.06 to 0.10 seconds. A QRS duration greater than 0.10 seconds indicates a delay in ventricular conduction, which could be due to a bundle branch block or other conduction abnormalities.
D. In a normal sinus rhythm, the P wave should consistently appear before each QRS complex. This reflects proper atrial depolarization followed by ventricular depolarization. This pattern indicates that the heart's electrical impulses are originating from the sinus node and are being properly conducted through the AV node to the ventricles.

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A nurse is caring for a client who has a suspected diagnosis of myasthenia gravis. The provider prescribes a Tensilon test. Which of the following findings indicates a positive test?

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