Multipurpose coaxial needle used for percutaneous nephrostomy

We describe a 24-cm long coaxial needle that has a 15-cm, beveled outer sleeve and accepts a 0.038-inch (0.097-cm) guidewire. A Luer-loc fastens the outer needle to the inner one. The outer sleeve has markings etched 1 cm apart to indicate the distance from the tip of the inner needle and that of the outer sleeve. This needle was designed to be used for percutaneous nephrostomy, particularly in the infant and in nondilated urinary systems.