Preservative free Chloroprocaine seems like a promising alternative, being a short acting agent of increasing popularity in recent years. Chloroprocaine has many advantages like quick onset, dense sensory and motor block of short duration hence this drug is considered as a preferred choice for patient undergoing short duration lower limb surgery. Present study was performed with an aim to study and compare intra operative quality and duration of anaesthesia and level of sub arachnoid block.

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... ects and Methods: This study was planned to evaluate the effect of 3ml, 4ml and 5ml of chlorprocaine in subarachnoid block in patient undergoing short duration lower limb surgery umder spinal anesthesia. After obtaining approval from the institutional ethics committee and informed consent, 50 patients between age group 16-47 years of either sex belonging to ASA grade I and II for elective short duration lower limb surgeries were included in the study. A specially design performa was used to collect the data patient allocated to either group A(3ml),group B(4ml),group C(5ml) of intrathecal chloroprocaine. Results: There is no significant difference in patient age, gender & ASA classification in three groups. There is no significant difference of systolic and diastolic blood pressure and heart rate between three groups. There is no significant difference in onset of sensory and motor block in these groups, but the duration of sensory block was shorter in group A (60.14±7.45) than group B (81.15±10.36) & group C (102.79±7.64). Conclusion: Intrathecal 1% is safe short acting local anesthetics for short or ultra-short surgical procedures. Onset and duration of sensory and motor block & time of recovery of ambulation were dose related.