1. What data in particular will be shared?
   Response - All of the individual participant data collected during the trial, after de-identification.
   


2. What additional supporting information will be shared?
   Response -  Study Protocol
   
   
3. Who will be able to view these files?
   Response - Researchers who provide a methodologically sound proposal.
   


4. For what types of analyses will this data be available?
   Response - Any purpose.
   


5. By what mechanism will data be made available?
   Response - Proposals should be directed to [geetamanojkamal@gmail.com].
   


6. For how long will this data be available start date provided 27-08-2023 and end date provided 27-06-2028?
   Response - Beginning 3 months and ending 5 years following article publication.
   


7. Any URL or additional information regarding plan/policy for sharing IPD? 
   Additional Information - NIL

All patients will undergo preoperative anaesthetic evaluation and will be explained about the visual analog scale (VAS) (0-10, where 0 =no pain and 10=worst imaginable pain). All patients will be kept fasting overnight and will be pre-medicated with tablet lorazepam 0.05 mg/kg and tablet ranitidine 150 mg orally the night before surgery. On the day of surgery, in the preoperative area, an intravenous line will be secured and normal saline infusion will be started. All patients will be premedicated with midazolam 2mg, metoclopramide 10 mg, and glycopyrrolate 0.2 mg intravenously half an hour before induction in the preoperative area.

 Patients will undergo single-level lumbar canal decompression, in the standard prone position on a Wilson frame, via a midline incision, under general anesthesia. After shifting to the operation theatre, standard monitoring i.e. electrocardiogram (ECG), pulse oximetry (Spo₂), noninvasive blood pressure (NIBP), end-tidal carbon dioxide (EtCO₂), and body temperature will be started and baseline vital parameters will be recorded and monitoring will be continued till extubation. General anaesthesia will be induced with fentanyl 2 µg/kg, propofol 2-3 mg/kg till loss of verbal response and tracheal intubation will be facilitated by atracurium 0.5mg/kg, intravenously. Subsequently, anaesthesia will be maintained using isoflurane achieving an end-tidal concentration of 0.9 to 1.2% in a mixture of 60% N₂O in O₂. Neuromuscular relaxation will be maintained with intermittent atracurium bolus (0.15 mg/kg every 20 minutes). Ventilation will be adjusted to maintain EtCO₂ between 30 and 35 mm Hg. Intraoperative rescue analgesia will be provided by intravenous fentanyl 0.5-1 μg/kg boluses as judged by an increase in heart rate or systolic blood pressure by more than 20% of the baseline.

Patients will be divided into three groups by using computer-generated random table numbers. At the end of the surgical procedure, after securing hemostasis and before final closure, in group M, a piece of absorbable gel foam soaked in inj morphine 5 mg (0.5 ml) + 10 ml of 0.9% sodium chloride will be placed in epidural space over the paraspinal region, above the nerve roots by the surgeon. In group R gel foam was soaked in 10 mL of 0.5% ropivacaine + 0.5 ml of 0.9% sodium chloride in epidural space and in group MR: Gelfoam soaked in inj morphine 5 mg (0.5 ml) + 10 mL of 0.5% ropivacaine in epidural space. After placing the gel foam, the drug solution will be allowed to remain in the wound for a contact time of 60 seconds. Thereafter, the wound will be closed in layers without mopping or suctioning.

All patients will be given inj ondansetron 0.1mg/kg prophylactically 30 minutes before reversal. At the end of surgery, patients will be turned supine and residual neuromuscular blockade will be reversed with i.v. neostigmine 50 µg.kg^-1 and glycopyrrolate 10 µg.kg^-1 and the trachea will be extubated when the patient is fully awake and breathing adequately and will be shifted to post anaesthesia care unit (PACU).