COMPARATIVE STUDY OF 0.5% BUPIVACAINEWITH 0.75% ROPIVACAINE USED FOR SUBARACHNOID BLOCK IN PATIENTS UNDERGOING ELECTIVE CAESEREAN SECTION

Dr. Syeda Farha Nasreen, Dr.(Col)V. R. R. Chari, Dr. Tanya Gulia

Abstract


Spinal anesthesia, is a form of regional anaesthesia which involves injection of a local anaesthetic into the cererospinal fluid (CSF), through a spinal needle. The desired effect of spinal anaesthesia is to block the transmission of nerve signals to and from the affected area. Sensory signals from the site are blocked, thereby eIiminating pain, and blockade of motor signals to the area eliminate movement. AIMS AND OBJECTIVES:To compare the effectiveness of intrathecal  Inj. Bupivacaine and Inj. Ropivacaine in caesarean section.MATERIALS AND METHOD:60 ASA-I and ASA-II fit patients were divided  into 2 equal groups of 30 patients each i.e. group I and group II. The patients were allocated to the respective groups by a computer generated model. GROUP I (CONTROL GROUP):In this group patients were given 0.5% hyperbaric Bupivacaine 2ml intrathecally. GROUP II (STUDY GROUP):In this group patients were given 0.75% isobaric Ropivacaine 2ml intrathecally. Under all aseptic precautions, sub-arachnoid block was given with 26G Quincke's needle in sitting position using mid-line approach. Group A was injected with 2ml 0.5% of bupivacaine and Group B was injected with 2 ml 0.5% of ropivacaine. Pulse, blood pressure and SP02 were measured every 3 minutes for first 15 minutes, then every 5 minutes for next 15 min ,thereafter every 10mins. Testing of Sensory block was done by using pinprick test. Only when it reached T5-T6 level ,surgical incision was allowed. The degree of motor blockade was assessed by loss of antigravity movements of the legs by  Modified Bromage  scale.RESULTS: It was observed that, both the groups were comparable with respect to the patient's demographic profile and hemodynamic stability. CONCLUSION:We conclude from our study that 0.75% isobaric ropivacaine when given intrathecally and compared with 0.5% hyperbaric bupivacaine produces a faster onset of sensory and motor block, similar two dermatomal regression of the sensory block, earlier recovery from the motor blockade and a similar duration of postoperative  analgesia as bupivacaine.


Keywords


cererospinal uid (CSF), Spinal anesthesia, spinal needle

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