11. 12. 13. 14. Same size and type of sterile catheter that the patient is wearing. Sterile cotton towel. Doubled fishline (30 cm.). Tie tapes (fabricated from e-inch and l-inch adhesive tape) approximately 8 inches in length. One end should be folded over a small reinforcing piece of x-ray film in which appropriate holes may then be punched (Fig. 1). Isopropanol 22%, butyl monoester, dimethyl phthalate (United Skin Prep*) or tincture of benzoin. Alcohol or povidone-iodine (Betadine) swabs. K-Y lubricating jelly. Sterile water-filled syringe if Foley catheter is used. Sterile irrigating syringe to fit catheter. Sterile water, saline solution, or “G” solution irrigant. Sterile forceps. Two sterile 5OO-ml. pitchers. Safety pin. Ether. Replacement of the nephrostomy tube should proceed as follows: 1. Have the patient comfortably seated or in the lateral decubital position. 2. Place the new catheter on the sterile towel adjacent to the patient (if Foley catheter, test balloon). 3. Tie fishline loosely around catheter and lubricate its tip (Fig. 2). 4. Remove the old tie tapes from the patient; clean the skin and apply United Skin Prep or tincture of benzoin. Leave the existing fishline tie on the patient’s old nephrostomy tube.