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Efficacy of Preventive Ketamine on Postoperative Pain

Efficacy of Preventive Ketamine on Postoperative Pain: A Randomized, Double-blind Trial of Patients Undergoing Laparoscopic Sleeve Gastrectomy

Status
Recruiting
Phases
Phase 4
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT04908579
Enrollment
90
Registered
2021-06-01
Start date
2021-06-15
Completion date
2026-09-30
Last updated
2026-07-07

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Postoperative Pain

Brief summary

* Although bariatric surgery is mainly performed laparoscopically, analgesic optimization is still essential to reduce complications and to improve the patients' comfort. In laparoscopic sleeve gastrectomy, the intraoperative peritoneal instillation of bupivacaine hydrochloride (30 ml, 0.25%) was known to be safe and effective in reducing postoperative pain, nausea, and vomiting. * Furthermore, usage of ketamine both as a pre and post-operative pain management is well established. Ketamine can be used solely or in combination with other co-adjuvant drugs, increasing their efficacy. Many therapeutic properties of ketamine have been attributed to its antagonism mechanism to N-Methyl-D-aspartate receptors.

Interventions

DRUGbupivacaine(intraperitoneally) and ketamine (intraperitoneally)

1. 40 ml volume of bupivacaine 0.25% + ketamine 0.5 mg/kg distributed as 30 ml intraperitoneally and 10 ml as port site infiltration 2. 10 ml normal saline 0.9% will be given intravenous.

DRUGbupivacaine(intraperitoneally) and ketamine (intravenously)

1. 40 ml volume of bupivacaine 0.25% only distributed as 30 ml intraperitoneally and 10 ml as port site infiltration 2. 10 ml volume of ketamine 0.5 mg/kg intravenously will be given after delivering the gastric sleeve and before start closure of port sites.

DRUGbupivacaine(intraperitoneally)

1. 40 ml volume of bupivacaine 0.25% only distributed as 30 ml intraperitoneally and 10 ml as port site infiltration 2. 10 ml normal saline 0.9% will be given intravenous.

Sponsors

Ain Shams University
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
DOUBLE (Subject, Caregiver)

Eligibility

Sex/Gender
ALL
Age
21 Years to 60 Years
Healthy volunteers
No

Inclusion criteria

* \- Body mass index \> 35 and \< 60 kg/m2 * Either medically free or with well controlled hypertension and/or diabetes.

Exclusion criteria

* \- Patient's refusal to participate in the study * BMI \> 60 kg/m2. * Age less than 21 years. * Patients with severe systemic disease which is not life-threatening. * Patients on antipsychotics, antidepressants and/or corticosteroids. * Patients with history of obstructive sleep apnea. * Allergic reaction to any of the study medications.

Design outcomes

Primary

MeasureTime frameDescription
Time to first given rescue analgesia(minutes)24 hours postoperativelyTime to first given rescue analgesia(minutes)

Countries

Egypt

Contacts

CONTACTIbrahim Mamdouh Esmat
ibrahim_mamdouh@med.asu.edu.eg01001241928

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Jul 8, 2026