Intraoperative Lidocaine and Combined With Ketamine on Opioid After Bariatric Surgery

NCT ID: NCT04524130

Last Updated: 2025-05-09

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

PHASE4

Total Enrollment

87 participants

Study Classification

INTERVENTIONAL

Study Start Date

2021-04-01

Study Completion Date

2025-01-31

Brief Summary

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The most effective long-term treatment for obesity is bariatric surgery, however, postoperative pain control is challenging in these group of population. Opioid-sparing technique with multimodal analgesia is recommended but the evidence supported is still limited. Multimodal analgesia, particularly lidocaine and ketamine, has been used effectively in various type of surgery. However, the evidence supported their use in obese patients undergoing bariatric surgery is limited.

Detailed Description

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The prevalence of obesity and associated diseases have been increasing in recent decades. From 1980 to 2013, the number of adults with BMI more than 25 kg/m2 increased from 28.8% to 36.9% in men, and from 29.8% to 38% in women. According to World Health Organization (WHO), the prevalence of overweight among adults in Thailand in 2016 was 32.6%, markedly increased from 2011 which was 23.9%. To date, the most effective long-term treatment for obesity is bariatric surgery because of significantly reducing body fat, the development of new obesity-related conditions, and overall mortality. However, postoperative complications, particularly respiratory complication, are concerned because obesity is associated with respiratory compromise and sleep-disordered breathing. The 2016 guideline for perioperative care in bariatric surgery developed by enhanced recovery after surgery (ERAS) society state that, regarding to current evidence, there is no specific anesthetic agents or techniques for bariatric surgery, however, multimodal analgesia should be used to reduce opioid consumption and opioid-related complications such as respiratory depression, postoperative nausea and vomiting and ileus. Moreover, several studies supported opioid-sparing technique to avoid respiratory complications.

Intravenous lidocaine is widely used to reduce postoperative pain and to reduce perioperative opioid as a multimodal analgesia. From Cochrane review, perioperative lidocaine can decrease pain at rest, postoperative ileus and postoperative nausea and vomiting in elective and urgent surgery. Few trials in obese patients underwent laparoscopic bariatric surgery found that lidocaine infusion can decrease opioid consumption. However, the supported evidence is still limit. Ketamine has been used for postoperative analgesia as well, as an effective adjunct to decrease opioid consumption in various types of surgery, including open bariatric surgery. Moreover, the recent retrospective study (Tovikkai P, in press) found that there was a positive interaction between intraoperative lidocaine infusion and ketamine for decreasing opioid consumption in obese patients underwent laparoscopic bariatric surgery. However, the benefit of lidocaine and ketamine for postoperative pain in obese patients underwent laparoscopic bariatric surgery is still debated.

Therefore, we designed this study to examine the effect of intraoperative lidocaine infusion and intraoperative lidocaine infusion combined with intraoperative low-dose ketamine infusion on opioid consumption in obese patients undergoing laparoscopic bariatric surgery.

Conditions

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Laparoscopic Bariatric Surgery

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

QUADRUPLE

Participants Caregivers Investigators Outcome Assessors

Study Groups

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Lidocaine and Ketamine

Participants in this arm will receive intra-operative lidocaine and ketamine infusion as adjunctive drugs for pain control. All medication is dosed based on calculated lean body weight (LBW) by Janmahasatian formula.

Group Type EXPERIMENTAL

Lidocaine Hydrochloride

Intervention Type DRUG

lidocaine will be given 1.5 mg/kg bolus at induction then 2mg/kg/hr until the end of surgery.

Ketamine

Intervention Type DRUG

Ketamine will be given 0.35 mg/kg bolus at induction then 0.2 mg/kg/hr until the end of surgery.

Lidocaine

Participants in this arm will receive only intra-operative ketamine infusion as adjunctive drugs for pain control. All medication is dosed based on calculated lean body weight (LBW) by Janmahasatian formula.

Group Type ACTIVE_COMPARATOR

Lidocaine Hydrochloride

Intervention Type DRUG

lidocaine will be given 1.5 mg/kg bolus at induction then 2mg/kg/hr until the end of surgery.

Placebo

Intervention Type DRUG

Normal saline will be given with the same rate of lidocaine or ketamine.

Placebo

Participants in this arm will receive normal saline, same volume as lidocaine and ketamine.

Group Type PLACEBO_COMPARATOR

Placebo

Intervention Type DRUG

Normal saline will be given with the same rate of lidocaine or ketamine.

Interventions

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Lidocaine Hydrochloride

lidocaine will be given 1.5 mg/kg bolus at induction then 2mg/kg/hr until the end of surgery.

Intervention Type DRUG

Ketamine

Ketamine will be given 0.35 mg/kg bolus at induction then 0.2 mg/kg/hr until the end of surgery.

Intervention Type DRUG

Placebo

Normal saline will be given with the same rate of lidocaine or ketamine.

Intervention Type DRUG

Other Intervention Names

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Li Ke Normal Saline

Eligibility Criteria

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Inclusion Criteria

1. Adults patients age older than 18 years.
2. Body mass index more than 30 kg/m2.
3. Scheduled for laparoscopic bariatric surgery, including laparoscopic sleeve gastrectomy, robotic-assisted laparoscopic sleeve gastrectomy, laparoscopic Roux-en-Y gastric bypass surgery or robotic-assisted laparoscopic gastric bypass.

Exclusion Criteria

1. Patient refusal.
2. Inability to communicate or read in Thai language.
3. Allergic to lidocaine or ketamine.
4. History of opioid use within 2 weeks before surgery
5. Cardiovascular disorder, including high grade atrioventricular block (second degree or third degree), history of coronary artery disease, poor controlled hypertension.
6. History of stroke, intracranial hemorrhage or intracranial mass
7. Cognitive impairment
8. Schizophrenia or history of antipsychotic drugs
9. Pregnant or breast-feeding patients
10. Conversion to open surgery
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Mahidol University

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Parichat Tovikkai

Role: PRINCIPAL_INVESTIGATOR

Mahidol University

Locations

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Faculty of medicine Siriraj hospital

Bangkok, Bangkok, Thailand

Site Status

Countries

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Thailand

References

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Other Identifiers

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610/2563(IRB3)

Identifier Type: -

Identifier Source: org_study_id

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