What is the minimum Systolic Blood Pressure required by the Canadian Red Cross Emergency Care Manual to safely administer Nitroglycerin?

The minimum systolic blood pressure required to safely administer Nitroglycerin is crucial for patient safety as it helps prevent significant hypotension, which can lead to serious complications. In general, Nitroglycerin is used to relieve chest pain and works by dilating blood vessels, but it can also lower blood pressure.

The correct choice indicates that a systolic blood pressure of 100 mmHg is the lower threshold to allow for safe administration. If the systolic pressure is below this level, the risk of excessive drop in blood pressure due to the vasodilation effects of Nitroglycerin increases, potentially leading to inadequate perfusion of vital organs and other serious adverse effects.

In contrast, the other options suggest lower thresholds that may not adequately protect the patient from the risks associated with administering Nitroglycerin when blood pressure is not within a safe range. Using a threshold of 90 mmHg or lower can increase the likelihood of complications during treatment. Thus, choosing the proper minimum systolic blood pressure is essential for the safety and effectiveness of administering Nitroglycerin in emergency situations.