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, the finger cuff comprising: a light emitting diode (LED) and photodiode (PD) contained in the finger cuff to form an LED-PD pair to perform measurements of a pleth signal in the patient's artery in the volume clamp method implemented by the blood pressure measurement system; and a bladder to apply pressure to the patient's finger and the patient's artery, wherein, 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 pleth versus time response, determines pleth servo gains; 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, characterized in that the pleth servo gains include a proportional gain, an integral gain, a derivative gain, and a global gain, wherein each of the pleth servo gains is determined as a function of at least one parameter of the pleth versus time response, the pleth servo gains being variable and dependent upon physiology of the patient so that the pleth servo gains compensate for delays in a pleth response of the finger. a light emitting diode (LED) and photodiode (PD) contained in the finger cuff to form an LED-PD pair to perform measurements of a pleth signal in the patient's artery in the volume clamp method implemented by the blood pressure measurement system; and a bladder to apply pressure to the patient's finger and the patient's artery, wherein, 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 pleth versus time response, determines pleth servo gains; 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, characterized in that applies a first pressure impulse and measures a pleth versus time response; from the pleth versus time response, determines pleth servo gains; 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, characterized in that the pleth servo gains include a proportional gain, an integral gain, a derivative gain, and a global gain, wherein each of the pleth servo gains is determined as a function of at least one parameter of the pleth versus time response, the pleth servo gains being variable and dependent upon physiology of the patient so that the pleth servo gains compensate for delays in a pleth response of the finger. <EOS>