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CompletedNCT01911520BRIDIONUpdated Jul 13, 2021

Dose Finding Study for Effective Reversal of a Deep Rocuronium-induced Neuromuscular Block With Sugammadex in Morbidly Obese Patients

A Phase 2 interventional study of Sugammadex 2 mg/kg and Sugammadex. 4 mg/kg in Morbidly Obese Patients, sponsored by University Hospital, Ghent. Completed at 1 site in Belgium. Open to participants aged 18 Years to 65 Years. Per ClinicalTrials.gov, last updated 2021-07-13.

Sponsored by University Hospital, Ghent · Phase 2, Interventional, and Treatment

Phase
Phase 2
Study type
Interventional
Enrollment
40
Allocation
Randomized
Ages
18 Years to 65 Years
Sex
All
01

Study summary

During laparoscopic bariatric surgery, adequate muscle relaxation is important to maintain good surgical conditions. To achieve this muscle relaxation, neuromuscular transmission blocking agents, such as rocuronium (Esmeron®) are used. It sometimes happens that there is still some neuromuscular blocking activity left in the patient on awakening from anesthesia. This is called residual curarization and is known to cause postoperative complications such as impairment of respiratory function.

Sugammadex (Bridion®) is a novel drug which selectively binds rocuronium (Esmeron®). It allows for reversing of neuromuscular transmission blocking activity. Until now, all studies with sugammadex were performed in non-obese patients.

Obese patient have a high risk to suffer from post-operative respiratory failure. Therefore it is vital to avoid residual curarization. Sugammadex might be an important factor.

Obese patients have a large total body weight different from ideal body weight. Recent research demonstrated that the dose for the neuromuscular blocking agent rocuronium (Esmeron®) needs to be calculated on the patients' Ideal Body Weight rather than on Total Body Weight.

At this moment no data is available on the dose-response relationship of sugammadex in morbidly obese patients.

We hypothesize that in morbidly obese patients sugammadex should be dosed on ideal bodyweight, instead of total bodyweight.

Read the detailed description

Flowchart :

72 participants

Stratification

BMI\<50 BMI >50

Randomization Randomization

TBW IBW TBW IBW

2mg/kg n=9 2mg/kg n=9 2mg/kg n=9 2mg/kg n=9 4mg/kg n=9 4mg/kg n=9 4mg/kg n=9 4mg/kg n=9

TBW : Total Body Weight IBW : Ideal Body Weight

02

Conditions studied

  • Morbidly Obese Patients

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03

In context

Obesity

6,296 studies on the registry are indexed under Obesity; 1,692 are open to participants now.

This study's enrollment of 40 is below the median of 78 across 4,878 interventional studies indexed under Obesity.

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Lead sponsor

University Hospital, Ghent is the lead sponsor of 665 studies on the registry; 156 are open to participants now.

Of its 5 completed or terminated interventional studies of FDA-regulated products, 4 (80%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 65 Years
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • ASA I-II-III
  • Age 18 - 65 year
  • Male or female
  • BMI > 30

Exclusion criteria

Exclusion criteria :

  • Renal failure
  • Liver dysfunction
  • Breastfeeding female patients, or female patients without reliable contraception
  • Neuromuscular disease
  • Malignant hyperthermia or a family history of malignant hyperthermia
  • Allergy for neuromuscular blocking agents or other medications used during general anesthesia
  • Infectious disease or patients with fever
  • Patients who already received rocuronium or sugammadex on the day of the study
05

Study design

Phase
Phase 2
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Double (Participant, Investigator)
Enrollment
40 participants (actual)

Study arms

  • Experimental
    BMI < 50, Total Body Weight (TBW), 2mg/kg

    Patients with a BMI \< 50, who will be dosed according to total body weight.

    Drug: Sugammadex 2 mg/kg · Procedure: Neuromuscular monitoring. · Procedure: Clinical evaluation of residual curarization .

  • Experimental
    BMI < 50, TBW, 4 mg/kg

    Patients with a BMI \< 50, who will be dosed according to total body weight.

    Drug: Sugammadex. 4 mg/kg · Procedure: Neuromuscular monitoring. · Procedure: Clinical evaluation of residual curarization .

  • Experimental
    BMI < 50, Ideal Body Weight (IBW), 2 mg/kg

    Patients with a BMI \< 50, who will be dosed according to ideal body weight.

    Drug: Sugammadex 2 mg/kg · Procedure: Neuromuscular monitoring. · Procedure: Clinical evaluation of residual curarization .

  • Experimental
    BMI < 50, IBW, 4 mg/kg

    Patients with a BMI \< 50, who will be dosed according to ideal body weight.

    Drug: Sugammadex. 4 mg/kg · Procedure: Neuromuscular monitoring. · Procedure: Clinical evaluation of residual curarization .

  • Experimental
    BMI > 50, TBW, 2mg/kg

    Patients with a BMI \> 50, who will be dosed according to total body weight.

    Drug: Sugammadex 2 mg/kg · Procedure: Neuromuscular monitoring. · Procedure: Clinical evaluation of residual curarization .

  • Experimental
    BMI > 50, TBW, 4mg/kg

    Patients with a BMI \> 50, who will be dosed according to total body weight.

    Drug: Sugammadex. 4 mg/kg · Procedure: Neuromuscular monitoring. · Procedure: Clinical evaluation of residual curarization .

  • Experimental
    BMI >50, IBW, 2 mg/kg

    Patients with a BMI \> 50, who will be dosed according to ideal body weight.

    Drug: Sugammadex 2 mg/kg · Procedure: Neuromuscular monitoring. · Procedure: Clinical evaluation of residual curarization .

  • Experimental
    BMI >50, IBW, 4 mg/kg

    Patients with a BMI \> 50, who will be dosed according to ideal body weight.

    Drug: Sugammadex. 4 mg/kg · Procedure: Neuromuscular monitoring. · Procedure: Clinical evaluation of residual curarization .

Interventions

  • DrugSugammadex 2 mg/kg

    Patients receive 2 mg/kg Sugammadex.

  • DrugSugammadex. 4 mg/kg

    Patients receive 4 mg/kg Sugammadex.

  • ProcedureNeuromuscular monitoring.

    Neuromuscular monitoring using a TOF watch SX (Organon).

  • ProcedureClinical evaluation of residual curarization .

    Every 30 min, during the first 2 hours after the end of the surgery.

06

What researchers measure

Primary outcomes

  1. Time to complete recovery of muscle relaxation, 30 minutes after end of surgery.

    Measured with TOF Watch SX (TOF ratio \> 0.9); clinical evaluation (eg head lift) of residual curarization in the Post Anesthetic Care.

    Time frame: 30 minutes after end of surgery.

  2. Time to complete recovery of muscle relaxation, 1 hour after the end of surgery.

    Measured with TOF Watch SX (TOF ratio \> 0.9); clinical evaluation (eg head lift) of residual curarization in the Post Anesthetic Care.

    Time frame: 1hour after end of surgery.

  3. Time to complete recovery of muscle relaxation, 1 hour 30 minutes after the end of surgery.

    Measured with TOF Watch SX (TOF ratio \> 0.9); clinical evaluation (eg head lift) of residual curarization in the Post Anesthetic Care.

    Time frame: 1hour 30 minutes after end of surgery.

  4. Time to complete recovery of muscle relaxation, 2 hours after the end of surgery.

    Measured with TOF Watch SX (TOF ratio \> 0.9); clinical evaluation (eg head lift) of residual curarization in the Post Anesthetic Care.

    Time frame: 2 hours after end of surgery.

Secondary outcomes

  1. Need/use of rescue medication at the end of surgery

    Additional administration of sugammadex 2 mg/kg Total Body Weight) at the end of surgery.

    Time frame: The hours following the end of surgery.

07

Study locations

1 site
  • Ghent University Hospital
    Ghent, 9000, Belgium
08

References and documents

Related links

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jul 13, 2021, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT01911520
Lead sponsor
University Hospital, Ghent
Responsible party
Sponsor
First posted
Jul 30, 2013
Start date
Jan 2011
Primary completion
Jun 2012
Completion
Jun 2012
Last update
Jul 13, 2021

Study contacts

Jurgen Van Limmen, MD
principal investigator · University Hospital, Ghent
Luc De Baerdemaeker, MD, PhD
principal investigator · University Hospital, Ghent
Koen Reyntjens, MD
principal investigator · University Hospital, Ghent

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

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