When observing pulse, which of the following is NOT a characteristic to note?

When observing a pulse, the primary characteristics to note are related to the rhythm, strength, and quality of the pulse. Noting whether the pulse is weak or strong, regular or irregular, and pounding or fluttering provides essential information about the patient's cardiovascular status. These characteristics help healthcare providers assess the heart's function and the overall circulation.

The characteristic of "warm or cold," however, does not pertain to the pulse itself but rather to the temperature of the skin or extremities. While temperature can inform healthcare providers about circulation and perfusion, it is not a direct characteristic of the pulse. Therefore, this choice is the one that does not belong in the context of assessing pulse characteristics.