The dumb person would not have asked.
Too often we here and people in general presume others know what we know. This shores up our self image, I am smarter than him because he does not know what a sphygmomamometer is. The fact is we ALL know something others do not know and to lord that over others is shallow.
Example:Men do not know the joy and elation of bringing a life into this world while women won't get to enjoy standing up and pissing.
That sphyg'y thing is a blood pressure cuff.
RED CENTED for being curious and brave enough to ASK...........................................
As always,
Playbetter