Effect of Thoracolumbar Interfacial Plane Block or Erector Spinae Plane Block on the Enhanced Recovery After Spine Surgeries: Prospective Randomized Double-blind Study

This prospective randomized double-blind study will be carried out on 80 adult patients who will be presented for different spine surgeries in Tanta university hospitals after obtaining the approval from the institutional Ethical Committee, informed written consent will be obtained from all the participants.

Patients will be randomly classified using a computer-generated software of randomization into 2 groups:

• Group I (40 patients) (ESP block): patients in this group will receive ESP block after induction of general anesthesia.
• Group II (40 patients) (TLIP block): patients in this group will receive TLIP block after induction of general anesthesia

Anesthetic technique

• The patients will be assessed preoperatively in the anesthesia clinic. On arrival of patients to the preparation room, an intravenous line will be established and the patient will be connected to a monitor. All the patients will receive pheniramine hydrogen maleate 45.5 mg intravenous as an antihistamine, Cefazolin30 mg/kg, and 40 mg pantoprazole.
• Induction of anesthesia will be carried out by fentanyl 1 ug/kg, propofol 1.5 mg/kg, and atracurium 0.5 mg/kg to facilitate tracheal intubation. After securing the airway through a suitable sized endotracheal tube, the patient was connected to a mechanical ventilator with its parameters adjusted to maintain the end-tidal carbon dioxide 34-38 mmHg.
• Maintenance of the anesthesia was performed by isoflurane 1.MAC and incremental doses of atracurium 0.1 mg/kg. A temperature probe was inserted in the nasopharynx for core temperature monitoring. The depth of anesthesia was monitored by the bispectral index (Covidien, Mansfield, MA, USA). The BIS values were kept 40-60. An additional bolus dose of fentanyl 0.5 ug/kg was used in case of increase BIS more than 60 or increase in the heart rate or mean arterial pressure by more than 15 % of the baseline values.
• All patients received tranexamic acid 30 mg/kg through intravenous infusion. Before skin incision, patients of group I will receive ultrasound-guided ESP block, while patients in group II will receive ultrasound guided TLIP block.
• At the end of the surgery, the isoflurane was switched off with reversal of muscle relaxation and awake tracheal extubation and transfer of the patient to the recovery room for postoperative monitoring and supplementation of oxygen through a nasal cannula (2-3 L/min). All the patients will receive 4 mg dexamethasone I .v after induction of anesthesia and 4 mg of ondansetron i.v at the end of the surgery to guard against postoperative nausea and vomiting. All the patients received routine postoperative analgesia in the form of paracetamol 1 gm i.v infusion every 6 hours and ketorolac 30 mg i.v every 12 hours. Rescue analgesia in the form of morphine 3 mg i.v was administrated when the pain score was more than 3.