Disclosed is a system to provide adaptive tuning through a control system to a finger cuff connectable to a patient's finger to be used in measuring the patient's blood pressure in the patient's artery by a blood pressure measurement system utilizing a volume clamp method. When the finger cuff is placed around the patient's finger, the bladder and the LED-PD pair aid in measuring the patient's blood pressure by the blood pressure measurement system utilizing the volume clamp method, wherein the adaptive tuning system: applies a first pressure impulse and measures a pleth versus time response； from the pressure versus time response, determines pleth servo gains that compensate for delays in a pleth response of the finger； and uses the determined pleth servo gains in the control system in measuring the patient's blood pressure by the blood pressure measurement system utilizing the volume clamp method.
