Adenosine receptor antagonists, especially aminophyllline, are used to treat or prevent acute renal failure. The system can include an acoustic sensor configured to detect an underwater acoustic signal and form an analog signal proportional to the underwater acoustic signal. The torsion coil spring is disposed between the rotational shaft and the rotation transmitting member under a condition that the torsion spring is compressed to a predetermined length from a free length. The peripheral vibration carrier is a rigid body of solid material supported by peripheral sensors disposed thereunder.