After deflating the blood pressure cuff too quickly, what should a technician do before retesting?

The most appropriate action after deflating the blood pressure cuff too quickly is to release all air from the cuff before retesting. This step ensures that the cuff is fully deflated and allows for an accurate measurement on the next attempt. If the cuff is not fully deflated, residual pressure could affect the readings, leading to incorrect results.

Waiting for a designated time or checking the patient's pulse may not directly address the issue of the inaccurately inflated cuff, and changing the cuff size is not necessary unless the current cuff is not appropriate for the patient's arm circumference. These latter choices may introduce unnecessary delays or complications in the process of obtaining an accurate blood pressure reading. By making sure the cuff is completely deflated, you're ensuring the accuracy and reliability of the subsequent measurement.