A nurse is caring for a client in the ICU. The client's ECG monitor tracing reveals sinus bradycardia and ST-segment elevation. The client reports shortness of breath and feeling dizzy and faint. Which of the following medications should the nurse administer?

Choice A reason: Instructing the client to expect tingling in their extremities is not a standard post-lumbar puncture care instruction. Tingling may be a sign of nerve irritation or damage, which is not an expected outcome and should be reported if it occurs.

Choice B reason: Measuring blood glucose every 2 hours is not related to post-lumbar puncture care unless the client has a specific condition that requires such monitoring. Post-lumbar puncture care focuses on preventing complications such as headaches and monitoring for signs of infection or bleeding.

Choice C reason: Limiting the client's fluid intake is not advised following a lumbar puncture. In fact, increasing fluid intake can help prevent the occurrence of post-lumbar puncture headaches, which are a common complication. Adequate hydration helps replenish cerebrospinal fluid and reduce headache severity.

Choice D reason: Instructing the client to lie flat is the correct action. After a lumbar puncture, it is recommended that the client lies flat for several hours to prevent the leakage of cerebrospinal fluid from the puncture site, which can lead to a spinal headache. Lying flat helps maintain normal cerebrospinal fluid pressure and reduces the risk of headache.

Choice A reason: Checking the pulse distal to the graft is essential to ensure that the graft is patent and that there is adequate blood flow to the distal extremity. A palpable pulse indicates that the graft is functioning properly and not occluded. The absence of a pulse could signify a serious complication, such as thrombosis or stenosis, which requires immediate attention.

Choice B reason: Keeping the left forearm below the level of the heart is not recommended as it can increase venous pressure and swelling, potentially compromising graft function. The extremity should be kept at or above heart level to promote venous return and reduce the risk of edema.

Choice C reason: Collecting blood specimens from the graft is generally avoided to prevent damage to the graft. Blood draws can be performed from other sites to protect the integrity of the graft.

Choice D reason: Splinting the left forearm is not a standard postoperative care measure for an arteriovenous graft. While protecting the graft from injury is important, immobilization with a splint is not necessary and can impede mobility and circulation.