Ketamine Effect After Laparoscopic Gastric Reduction: A Randomized, Double-Blinded, Placebo Controlled Study

October 3, 2019 updated by: Meltem Yilmaz, Northwestern University

Ketamine Effect on Recovery and Respiratory Outcomes After Laparoscopic Gastric Reduction: A Randomized, Double-Blinded, Placebo Controlled Study

Laparoscopic surgery for gastric reduction is frequently associated with high levels of postoperative pain. Postoperative pain is very often treated with opioids. However large doses of opioids can result in respiratory depression with hypoxemia especially in high risk patients with obstructive sleep apnea. since a large group of patients undergoing surgery for gastric reduction surgery also have obstructive sleep apnea, it is expected that these patients are also at high risk for postoperative respiratory depression and hypoxemia.

Intraoperative ketamine has been used as an effective multimodal agent to reduce postoperative pain. However, ketamine alone has not been examined to improve postoperative pain outcomes in patients undergoing gastric reduction surgery. More importantly, it is unknown if the use of intraoperative ketamine can lead to better overall quality of recovery in the same patient population. In addition, ketamine has been shown to improve ventilation but it remains to be determined if the intraoperative use of ketamine will result in less postoperative hypoxemic events.

The main objective of the current investigation is to examine the effect of intraoperative ketamine on postoperative quality of recovery after gastric reduction surgery. The investigators hypothesize that subjects receiving ketamine will have a greater global quality of recovery score than the ones receiving saline.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

80

Phase

  • Phase 4

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • Illinois
      • Chicago, Illinois, United States, 60611
        • Northwestern Memorial Hospital

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 64 years (Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Age 18-64
  • surgery: laparoscopic gastric reduction (gastric sleeve or gastric bypass)
  • ASA physical status classification I, II, III
  • Body Mass Index >35kg/m2
  • Fluent in English

Exclusion Criteria:

  • History of allergy to protocol medications
  • History of chronic opioid use
  • Pregnant patients
  • Drop out: Conversion to an open surgical route, patient or surgeon request.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Prevention
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Triple

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Active Comparator: Group K (Ketamine)
Group K (ketamine) will receive 0.5mg /kg of ketamine bolus followed by an infusion of 0.5 mg/kg/hour of ketamine throughout the intraoperative period (Adjusted body weight).
Drug: Ketamine
Group K (ketamine) will receive 0.5mg /kg of ketamine bolus followed by an infusion of 0.5 mg/kg/hour of ketamine throughout the intraoperative period (Adjusted body weight).
Other Names:
  • Ketalar
Placebo Comparator: Group P (Placebo)
Group P (placebo) will receive the same amount of saline.
Drug: placebo
Group P (placebo) will receive the same amount of saline.
Other Names:
  • Sterile .9 Normal Saline

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Quality of Recovery 40
Time Frame: 24 hours
Scores on QOR (quality of recovery) 40 questionnaire. The QoR-40 score, which ranges from 40 to 200, representing very poor (low scores) to outstanding quality of recovery (high scores), respectively.
24 hours

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Postoperative Opioid Consumption
Time Frame: 24 hours
Total number of opioids (morphine equivalents) consumed 24 hours after surgery
24 hours
Postoperative Pain Scores
Time Frame: 24 hours
Participants pain scores will be recorded at 24 hours after surgery. Pain scores range from 0 (no pain) to 10 (worst pain imaginable).
24 hours
Length of Hospital Stay
Time Frame: Up to 2 weeks
The subjects length of hospital stay will be recorded. Length of stay is defined as day of surgery to date of discharge from the hospital which may be up to 2 weeks..
Up to 2 weeks

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Northwestern University

Investigators

  • Principal Investigator: Meltem Yilmaz, MD, Northwestern University

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

November 1, 2013

Primary Completion (Actual)

July 26, 2019

Study Completion (Actual)

August 22, 2019

Study Registration Dates

First Submitted

November 18, 2013

First Submitted That Met QC Criteria

November 27, 2013

First Posted (Estimate)

November 28, 2013

Study Record Updates

Last Update Posted (Actual)

October 7, 2019

Last Update Submitted That Met QC Criteria

October 3, 2019

Last Verified

October 1, 2019

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • STU00081191

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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