Injection of fluid is frequently used for identification of the epidural space by the loss-of-resistance (LOR) technique. It has been shown that different volumes of saline may affect the subsequent epidural analgesia. Iwama showed that using 10 mL of saline as compared to two mL in patients undergoing elective surgery during lumbar epidural anesthesia with 2% mepivacaine resulted in a greater extent of anesthesia.2 Also, Okutomi et al examined the effect of saline volume on anesthetic levels and quality of thoracic epidural block in patients undergoing upper abdominal surgery. They demonstrated that the block level for cold after mepivacaine 1.5% was proportional to the saline volume injected, whereas the block level for pain was independent of the saline solution.3 Identifying the epidural space by a lost of resistance to air method is thought to increase the incidence of inadequate anesthesia. A randomized study, comparing air versus saline to identify the epidural space in parturients, found a higher incidence of inadequate analgesia in the air group (36% versus 19%).4