Prior to administering digitalis, what must be assessed?

When administering digitalis, it is essential to assess the apical pulse, as this medication has a significant effect on heart rate and rhythm. Digitalis, or digoxin, enhances the force of heart contractions and can also lower heart rate. Before giving the medication, checking the apical pulse provides crucial information about the heart's current state.

The normal protocol is to measure the apical pulse for a full minute prior to administration. If the pulse rate is below the prescribed threshold—often below 60 beats per minute in adults—this can indicate potential harm, making it necessary to hold the medication and notify a healthcare provider. This vital sign assessment ensures patient safety and helps prevent the adverse effects associated with digitalis, such as toxicity.

Other assessments, like checking blood pressure or respiratory rate, are also important in a comprehensive evaluation of the patient but do not specifically address the direct interactions and risks associated with digitalis administration. Blood glucose level, while important in managing overall health, is not relevant to the immediate effects of digoxin. Thus, of all the options, assessing the apical pulse is the most critical prior to administering digitalis.