Spinal anesthesia, is used during the transuretheral resection of the prostate.Low dose hyperbaric local anesthetics have been used to enhance the resolution of the spinal block. We compared the efficacy and duration of the spinal block with two different bupivacaine baricities.

• Group I: low dose isobaric group
• GroupII: Low dose hyperbaric group

Patients undergoing TURP were randomly allocated into two groups.

• Group I: Received fentanyl 20 µgr (0.4ml),heavy bupivacaine 0.5% (1.5 ml)and normal saline % 0.9 NaCl ( 1.1ml)
• Group II: Received fentanyl 20 µgr (0.4 ml), plain bupivacaine 0.5%(1.5 ml) normal saline 0.9% NaCl (1.1 mL) in total bupivacaine 0.25% (3ml) intrathecally.

Onset and duration of the sensory block, the degree of the motor block, side - effects and perioperative analgesic requirement assesed.

Inclusion Criteria:

• 50-85 years ASA 1-4 BENİGN PROSTAT HYPERPLASİ

Exclusion Criteria:

• Allergy of study drugs
• Morbid obesity
• Spinal anesthesia contrindications
• Bleeding dyscrasias