Effect of Intravenous Lidocaine on Immediate Post-operative Pain, Nausea and Vomiting in Patients Undergoing Laparoscopic Cholecystectomy: A Randomized Placebo Controlled Trial

Study Overview
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Brief Summary
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Lidocaine is a drug that has multiple uses. One of these is that when intravenously administered it is effective in reducing post-operative pain. The aim of this study is to investigate the beneficial effects of intravenous lignocaine on reducing pain, nausea and vomiting after laparoscopic cholecystectomy. Also, by this research, we are aiming to find a suitable alternative analgesic.

Detailed Description
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After approval of synopsis from College of Physician and Surgeons of Pakistan (CPSP) and Ethical review committee (ERC) of Aga Khan University Karachi, patients fulfilling the inclusion criteria will be enrolled in the study. Written informed consent will be obtained before the surgery. Patients will be randomly allocated by CTU through computer generated block randomization into either lidocaine group (LG) or placebo group (PG). The clinical trial unit (CTU) will be responsible to prepare the study drug and placebo in the same volume, color, consistency and packaging and treatment allocation would be done by assigning the study drug and placebo numbers. The staff, patient and the anaesthetists will be blind by the drug allocation. Only the CTU will have the list of randomization and their treatment allocation. All patient will be given general anesthesia as per standard of care. All patients will be pre-medicated with oral midazolam 7.5 mg one hour before operating room. Standard American Society of Anaesthesiologists (ASA) monitoring (NIBP, ECG, and Pulse Oximetry) will be applied. General anesthesia will be induced by Propofol 2 mg/kg, Nalbuphine 0.1mg/kg and Cis-Atracurium 0.2 mg/kg. Isoflurane 1% - 1.5% in a mixture of oxygen and air (50:50) will be used for maintenance of anesthesia. Before tracheal intubation, patients will receive intravenous bolus injection of the study drug in dose of 1.5mg/kg followed by the continuous infusion at the rate of 1.5mg/kg/hr. via standard computerized programmable infusion pump. The infusion will be continued throughout the surgery and will be stopped after extubation. After intubation, patients' minute ventilation will be adjusted to maintain normocapnia (end tidal CO2 35 - 40 mm of Hg). All patients will be given 1gm of intravenous Paracetamol after induction of anaesthesia. Supplemental analgesia, Nalbuphine 1mg, during surgery will be given if the heart rate and systolic blood pressure increases above 20% of respective baseline values and causes other than pain had been ruled out, which would be at the discretion of the primary anaesthetist. Prophylaxis for nausea and vomiting will be given by Dexamethasone 0.1mg/kg at induction of anaesthesia and Ondansetron 0.1mg/kg after the removal of gall bladder. At the end of surgery, residual neuromuscular blockade will be reversed by 0.05mg/kg of neostigmine and 0.5mg of glycopyrolate. The trachea will be extubated once the patient regained consciousness and then transferred to the post anesthesia care unit (PACU). In the PACU, each patient will be assessed by the primary investigator for pain, nausea and vomiting at 15, 30, and 60 minutes. If the patient's pain will be equal to 4 or more on the numerical rating scale, he/she will be given Nalbuphine 1mg as a rescue analgesic. Likewise, if the patients has complain of nausea or vomiting, equal to or greater than 2 on Bellvile nausea score, he/she will be given Metoclopramide 10mg as rescue antiemetic. The analgesic and anti-emetic requirement in the ward for the first 6 hr. post-operatively will be recorded by the primary investigator. The time of arrival at PACU will be recorded as T1. The discharge time from PACU will also be recorded and would be declared as T2. The time required for the patient to be discharged from the hospital will be recorded as TD. TD will be the time when surgical team decides that patient can be discharged from the hospital. The difference between the length of stay in the hospital between the two groups will be calculated as total time spent (in HOURS) in the hospital TT. It will be the sum of time interval between T1 to T2, and T2 to TD. TT= (T1+T2+TD)

Official Title
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Effect of Intravenous Lidocaine on Immediate Post-operative Pain, Nausea and Vomiting in Patients Undergoing Laparoscopic Cholecystectomy: A Randomized Placebo Controlled Trial

Conditions
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Post-operative Pain, Post-operative Nausea and Vomiting

Intervention / Treatment
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* Drug: Lidocaine


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Elective laparoscopic cholecystectomy All adults aged between 18 to 65 years ASA I and II Exclusion criteria: BMI greater than 35kg/m2 Allergy to local anesthetic agents Patient with or history of arrhythmias Patients with SGPT greater than 35 IU/L for females and greater than 45 IU/L for males. Patients with chronic renal disease and creatinine greater than 1.5mg/dl. Chronic use of opioids The surgeries which were converted to open procedures.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 65 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Prevention
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Triple


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Placebo Comparator: Placebo Group(PG)<br>It will be normal saline 0.9% | Drug: Lidocaine<br>* both the drugs will be prepared in same volume, color, consistency and appearance<br>* Other names: Normal saline 0.9%;|
| Active Comparator: Lidocaine Group(LG)<br>It will be lidocaine 2% | Drug: Lidocaine<br>* both the drugs will be prepared in same volume, color, consistency and appearance<br>* Other names: Normal saline 0.9%;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Post-operative pain as assessed on numerical rating scale | Immediate pain after laparoscopic cholecystectomy | upto 6 hours | 
| Post-operative nausea and vomiting as assessed on Bellville nausea score | feeling of nausea and vomiting after laparoscopic cholecystectomy | upto 6 hours | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Discharge time | discharge from hospital | upto 24 hours |