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Nitroglycerin directly induces vasodilation by relaxing the smooth muscle within the vein forcing it to expand. Rub a very small amount into the skin and let it sit for a few minutes. Research has shown a very small amount of nitroglycerin paste (smaller than a pea) rubbed on the skin will not have any significant systemic effect, even in a hypotensive patient.
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TEAM Rapid Response (IV Starts for the RN and EMT: RAPID and EASY Guide to Mastering Intravenous Catheterization, Cannulation and Venipuncture Sticks for Nurses and Paramedics)
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The remaining lymph nodes may become damaged if the IV were to get infected or by the meds/fluids running through it. This could result in permanent lymphedema in the affected extremity. Note that this is most common with mastectomies but also applies to any procedure where lymph nodes were removed. If no lymph nodes were removed then it is OK to use the arm even with a mastectomy.
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TEAM Rapid Response (IV Starts for the RN and EMT: RAPID and EASY Guide to Mastering Intravenous Catheterization, Cannulation and Venipuncture Sticks for Nurses and Paramedics)
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Opt for chlorhexidine gluconate (CHG) over a simple alcohol wipe if you have the choice. CHG wipes have 70% alcohol just like a standard alcohol wipe but they are also infused with 2% chlorhexidine gluconate.
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TEAM Rapid Response (IV Starts for the RN and EMT: RAPID and EASY Guide to Mastering Intravenous Catheterization, Cannulation and Venipuncture Sticks for Nurses and Paramedics)