38 patients each using computer generated random number table and the allotted number will

be secured in a coded opaque sealed envelope. The patients will be allocated to one of the

following two groups:

Group R (n=38): Patients will be given 3ml of 0.75% Hyperbaric Ropivacaine intrathecally

Group B (n=38): Patients will be given 3ml of 0.5% Hyperbaric Bupivaciane intrathecally

Procedure on day of surgery:

Patient will be shifted to the operation room. Monitoring of heart rate, systolic blood

pressure, diastolic blood pressure, mean arterial blood pressure, continuous

electrocardiogram, respiratory rate, and arterial oxygen saturation (Spo2) will be done using

multichannel monitor (Aespire view, GE Healthcare , Madison, WI, USA). Baseline values will be recorded.

After subarachnoid block has been given, assessment of sensory block will be done using sterile

pin prick method and motor blockade will be done using Modified Bromage scale. Assessment will

be done every minute for the first 10 minutes and then every 10 minutes during surgery and every

15 minutes postoperatively. Onset of both motor and sensory blockade will be assessed and

recorded. The highest dermatomal level of sensory blockade and recovery time of both sensory and

motor blockade will be recorded. Recovery time for the sensory blockade will be defined as the two

dermatome regression of anaesthesia from the maximal level. 

Patients with a VAS score of > 3 will receive rescue analgesia. The time of first

request for analgesia postoperatively will be recorded as total duration of spinal analgesia.

Patient will be monitored continuously intra and post operatively and observations will be recorded

in the prescribed proforma.