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Comparison of Sugammadex (Org 25969) With Neostigmine as Reversal Agents for Rocuronium or Vecuronium at Reappearance of T2 (P05960)

A Multi -Center Randomized Parallel Group Comparative Active Controlled Safety Assessor Blinded Phase 3a Pivotal Trial in Adult Subjects Comparing Org 25969 With Neostigmine as Reversal Agents of a Neuromuscular Block Induced by Rocuronium or Vecuronium at Reappearance of T2

Status
Completed
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT00451217
Enrollment
198
Registered
2007-03-23
Start date
2005-11-17
Completion date
2006-03-06
Last updated
2019-03-04

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

Conditions

Anesthesia, General

Brief summary

The purpose of this study was to demonstrate in adult participants faster recovery from a neuromuscular block induced by either rocuronium or vecuronium after reversal at reappearance of T2 (the amplitude of the first response of second twitch to train of four (TOF) stimulation, expressed as percentage of control first twitch, T1) by 2.0 mg/kg sugammadex (Org 25969) compared to 50 ug/kg neostigmine.

Interventions

DRUGSugammadex

After the last dose of rocuronium or vecuronium, at reappearance of T2, a dose of 2.0 mg/kg sugammadex was to be administered

DRUGNeostigmine

After the last dose of rocuronium or vecuronium, at reappearance of T2, a dose of 50 ug/kg neostigmine was to be administered

Sponsors

Merck Sharp & Dohme LLC
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Is of American Society of Anesthesiologists (ASA) 1 - 4; * Is above or equal to the age of 18; * Scheduled for surgical procedures with a general anesthesia with the use of rocuronium or vecuronium for endotracheal intubation and maintenance of neuromuscular block; * Scheduled for surgical procedure in supine position; * Given written informed consent.

Exclusion criteria

* Participants in whom a difficult intubation because of anatomical malformations was expected; * Is known or suspected to have neuromuscular disorders impairing neuromuscular block (NMB) and/or significant renal dysfunction; * Is known or suspected to have a (family) history of malignant hyperthermia; * Is known or suspected to have an allergy to narcotics, muscle relaxants or other medication used during general anesthesia; * Is receiving medication in a dose and/or at a time point known to interfere with neuromuscular blocking agents such as antibiotics, anticonvulsants and Mg2+; * Participants in whom the use of neostigmine and/or glycopyrrolate may be contraindicated; * Had already participated in a sugammadex trial; * Had participated in another clinical trial, not pre-approved by NV Organon, within 30 days of entering into P05960. * Females who are pregnant: * Females of childbearing potential not using any method of birth control: condom or using only hormonal contraception as birth control; * Females who were breast-feeding.

Design outcomes

Primary

MeasureTime frameDescription
Time From Start of Administration of Sugammadex or Neostigmine to Recovery of the Fourth Twitch/First Twitch (T4/T1) Ratio to 0.9.Day 1: From start of sugammadex or neostigmine administration to recovery of T4/T1 ratio to 0.9Neuromuscular functioning was monitored by applying repetitive Train-Of-Four (TOF) electrical stimulations to the ulnar nerve every 15 seconds and assessing twitch response at the adductor pollicis muscle. T1 and T4 refer to the amplitudes (heights) of the first and fourth twitches, respectively, after TOF nerve stimulation. The T4/T1 Ratio (expressed as a decimal of up to 1.0) indicates the extent of recovery from neuromuscular blockade (NMB). In this study, twitch responses were recorded until the T4/T1 Ratio reached \>= 0.9, the minimum acceptable ratio that indicated recovery from NMB. A faster time to recovery of the T4/T1 Ratio to 0.9 indicates a faster recovery from NMB.

Secondary

MeasureTime frameDescription
Time From Start of Administration of Sugammadex or Neostigmine to Recovery of the T4/T1 Ratio to 0.7Day 1: From start of sugammadex or neostigmine administration to recovery of T4/T1 ratio to 0.7Neuromuscular functioning was monitored by applying repetitive TOF electrical stimulations to the ulnar nerve every 15 seconds and assessing twitch response at the adductor pollicis muscle. T1 and T4 refer to the amplitudes (heights) of the first and fourth twitches, respectively, after TOF nerve stimulation. The T4/T1 Ratio (expressed as a decimal of up to 1.0) indicates the extent of recovery from NMB. A faster time to recovery of the T4/T1 Ratio to 0.7 indicates a faster recovery from NMB.
Time From Start of Administration of Sugammadex or Neostigmine to Recovery of the T4/T1 Ratio to 0.8Day 1: From start of sugammadex or neostigmine administration to recovery of T4/T1 ratio to 0.8Neuromuscular functioning was monitored by applying repetitive TOF electrical stimulations to the ulnar nerve every 15 seconds and assessing twitch response at the adductor pollicis muscle. T1 and T4 refer to the amplitudes (heights) of the first and fourth twitches, respectively, after TOF nerve stimulation. The T4/T1 Ratio (expressed as a decimal of up to 1.0) indicates the extent of recovery from NMB. A faster time to recovery of the T4/T1 Ratio to 0.8 indicates a faster recovery from NMB.
Number of Participants With Clinical Signs of Recovery Assessed by Level of Consciousness, Head Lift and Muscle Weakness, Prior to Transfer to the Recovery Room After ExtubationDay 1After anesthesia and prior to transfer to the recovery room after extubation, neuromuscular recovery was assessed by monitoring every 15 minutes the following clinical signs of recovery: level of consciousness (i.e., awake and oriented, arousable with minimal stimulation, responsive only to tactile stimulation); 5-second head lift test (ability to lift the head for 5 seconds); and general muscle weakness
Number of Participants With Clinical Signs of Recovery Assessed by Level of Consciousness, Head Lift and Muscle Weakness, Prior to Discharge From the Recovery RoomDay 1Just prior to discharge from the recovery room, neuromuscular recovery was assessed by monitoring every 15 minutes the following clinical signs of recovery: level of consciousness (i.e., awake and oriented, arousable with minimal stimulation, responsive only to tactile stimulation); 5-second head lift test (ability to lift the head for 5 seconds); and general muscle weakness

Participant flow

Recruitment details

Participants who had a surgical procedure using a general anesthesia of rocuronium or vecuronium for endotracheal intubation and maintenance of neuromuscular block were enrolled in this study.

Participants by arm

ArmCount
Rocuronium + Sugammadex
After the last dose of rocuronium, at reappearance of T2, a dose of 2.0 mg/kg sugammadex was administered
48
Rocuronium + Neostigmine
After the last dose of rocuronium, at reappearance of T2, a dose of 50 ug/kg neostigmine was administered
48
Vecuronium + Sugammadex
After the last dose of vecuronium, at reappearance of T2, a dose of 2.0 mg/kg sugammadex was administered
48
Vecuronium + Neostigmine
After the last dose of vecuronium, at reappearance of T2, a dose of 50 ug/kg neostigmine was administered
45
Total189

Withdrawals & dropouts

PeriodReasonFG000FG001FG002FG003
Overall StudyLost to Follow-up0111
Overall StudyNot Treated1134
Overall StudyWithdrawal by Subject1000

Baseline characteristics

CharacteristicRocuronium + SugammadexRocuronium + NeostigmineVecuronium + SugammadexVecuronium + NeostigmineTotal
Age, Continuous51 Years
STANDARD_DEVIATION 16
48 Years
STANDARD_DEVIATION 14
49 Years
STANDARD_DEVIATION 16
50 Years
STANDARD_DEVIATION 15
49 Years
STANDARD_DEVIATION 15
Ethnicity (NIH/OMB)
Hispanic or Latino
5 Participants9 Participants7 Participants8 Participants29 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
43 Participants39 Participants41 Participants37 Participants160 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Asian
0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Black or African American
1 Participants0 Participants0 Participants0 Participants1 Participants
Race (NIH/OMB)
More than one race
0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Unknown or Not Reported
1 Participants0 Participants0 Participants0 Participants1 Participants
Race (NIH/OMB)
White
46 Participants48 Participants48 Participants45 Participants187 Participants
Sex: Female, Male
Female
17 Participants24 Participants22 Participants24 Participants87 Participants
Sex: Female, Male
Male
31 Participants24 Participants26 Participants21 Participants102 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
EG003
affected / at risk
deaths
Total, all-cause mortality
0 / 480 / 480 / 480 / 45
other
Total, other adverse events
37 / 4840 / 4832 / 4835 / 45
serious
Total, serious adverse events
2 / 483 / 480 / 480 / 45

Outcome results

Primary

Time From Start of Administration of Sugammadex or Neostigmine to Recovery of the Fourth Twitch/First Twitch (T4/T1) Ratio to 0.9.

Neuromuscular functioning was monitored by applying repetitive Train-Of-Four (TOF) electrical stimulations to the ulnar nerve every 15 seconds and assessing twitch response at the adductor pollicis muscle. T1 and T4 refer to the amplitudes (heights) of the first and fourth twitches, respectively, after TOF nerve stimulation. The T4/T1 Ratio (expressed as a decimal of up to 1.0) indicates the extent of recovery from neuromuscular blockade (NMB). In this study, twitch responses were recorded until the T4/T1 Ratio reached \>= 0.9, the minimum acceptable ratio that indicated recovery from NMB. A faster time to recovery of the T4/T1 Ratio to 0.9 indicates a faster recovery from NMB.

Time frame: Day 1: From start of sugammadex or neostigmine administration to recovery of T4/T1 ratio to 0.9

Population: All randomized participants who received sugammadex or neostigmine and had at least one efficacy measurement. Imputed recovery times were used in cases of missing times.

ArmMeasureValue (MEAN)Dispersion
Rocuronium + SugammadexTime From Start of Administration of Sugammadex or Neostigmine to Recovery of the Fourth Twitch/First Twitch (T4/T1) Ratio to 0.9.1.62 MinutesStandard Deviation 0.83
Rocuronium + NeostigmineTime From Start of Administration of Sugammadex or Neostigmine to Recovery of the Fourth Twitch/First Twitch (T4/T1) Ratio to 0.9.26.78 MinutesStandard Deviation 24.6
Vecuronium + SugammadexTime From Start of Administration of Sugammadex or Neostigmine to Recovery of the Fourth Twitch/First Twitch (T4/T1) Ratio to 0.9.4.47 MinutesStandard Deviation 9.28
Vecuronium + NeostigmineTime From Start of Administration of Sugammadex or Neostigmine to Recovery of the Fourth Twitch/First Twitch (T4/T1) Ratio to 0.9.23.43 MinutesStandard Deviation 18.53
Secondary

Number of Participants With Clinical Signs of Recovery Assessed by Level of Consciousness, Head Lift and Muscle Weakness, Prior to Discharge From the Recovery Room

Just prior to discharge from the recovery room, neuromuscular recovery was assessed by monitoring every 15 minutes the following clinical signs of recovery: level of consciousness (i.e., awake and oriented, arousable with minimal stimulation, responsive only to tactile stimulation); 5-second head lift test (ability to lift the head for 5 seconds); and general muscle weakness

Time frame: Day 1

Population: All randomized participants who received sugammadex or neostigmine and had at least one efficacy measurement. One participant from the Rocuronium + Sugammadex treatment group, and one participant from the Vecuronium + Neostigmine treatment group were not analyzed.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Rocuronium + SugammadexNumber of Participants With Clinical Signs of Recovery Assessed by Level of Consciousness, Head Lift and Muscle Weakness, Prior to Discharge From the Recovery RoomAble to perform the 5 second head lift47 Participants
Rocuronium + SugammadexNumber of Participants With Clinical Signs of Recovery Assessed by Level of Consciousness, Head Lift and Muscle Weakness, Prior to Discharge From the Recovery RoomConsciousness: Arousable with minimal stimulation1 Participants
Rocuronium + SugammadexNumber of Participants With Clinical Signs of Recovery Assessed by Level of Consciousness, Head Lift and Muscle Weakness, Prior to Discharge From the Recovery RoomHas general muscle weakness0 Participants
Rocuronium + SugammadexNumber of Participants With Clinical Signs of Recovery Assessed by Level of Consciousness, Head Lift and Muscle Weakness, Prior to Discharge From the Recovery RoomConsciousness: Responsive only to tactile stimuli0 Participants
Rocuronium + SugammadexNumber of Participants With Clinical Signs of Recovery Assessed by Level of Consciousness, Head Lift and Muscle Weakness, Prior to Discharge From the Recovery RoomConsciousness: Awake and oriented46 Participants
Rocuronium + NeostigmineNumber of Participants With Clinical Signs of Recovery Assessed by Level of Consciousness, Head Lift and Muscle Weakness, Prior to Discharge From the Recovery RoomConsciousness: Responsive only to tactile stimuli0 Participants
Rocuronium + NeostigmineNumber of Participants With Clinical Signs of Recovery Assessed by Level of Consciousness, Head Lift and Muscle Weakness, Prior to Discharge From the Recovery RoomAble to perform the 5 second head lift48 Participants
Rocuronium + NeostigmineNumber of Participants With Clinical Signs of Recovery Assessed by Level of Consciousness, Head Lift and Muscle Weakness, Prior to Discharge From the Recovery RoomHas general muscle weakness0 Participants
Rocuronium + NeostigmineNumber of Participants With Clinical Signs of Recovery Assessed by Level of Consciousness, Head Lift and Muscle Weakness, Prior to Discharge From the Recovery RoomConsciousness: Arousable with minimal stimulation0 Participants
Rocuronium + NeostigmineNumber of Participants With Clinical Signs of Recovery Assessed by Level of Consciousness, Head Lift and Muscle Weakness, Prior to Discharge From the Recovery RoomConsciousness: Awake and oriented48 Participants
Vecuronium + SugammadexNumber of Participants With Clinical Signs of Recovery Assessed by Level of Consciousness, Head Lift and Muscle Weakness, Prior to Discharge From the Recovery RoomConsciousness: Responsive only to tactile stimuli0 Participants
Vecuronium + SugammadexNumber of Participants With Clinical Signs of Recovery Assessed by Level of Consciousness, Head Lift and Muscle Weakness, Prior to Discharge From the Recovery RoomConsciousness: Awake and oriented48 Participants
Vecuronium + SugammadexNumber of Participants With Clinical Signs of Recovery Assessed by Level of Consciousness, Head Lift and Muscle Weakness, Prior to Discharge From the Recovery RoomConsciousness: Arousable with minimal stimulation0 Participants
Vecuronium + SugammadexNumber of Participants With Clinical Signs of Recovery Assessed by Level of Consciousness, Head Lift and Muscle Weakness, Prior to Discharge From the Recovery RoomAble to perform the 5 second head lift48 Participants
Vecuronium + SugammadexNumber of Participants With Clinical Signs of Recovery Assessed by Level of Consciousness, Head Lift and Muscle Weakness, Prior to Discharge From the Recovery RoomHas general muscle weakness0 Participants
Vecuronium + NeostigmineNumber of Participants With Clinical Signs of Recovery Assessed by Level of Consciousness, Head Lift and Muscle Weakness, Prior to Discharge From the Recovery RoomAble to perform the 5 second head lift44 Participants
Vecuronium + NeostigmineNumber of Participants With Clinical Signs of Recovery Assessed by Level of Consciousness, Head Lift and Muscle Weakness, Prior to Discharge From the Recovery RoomConsciousness: Arousable with minimal stimulation1 Participants
Vecuronium + NeostigmineNumber of Participants With Clinical Signs of Recovery Assessed by Level of Consciousness, Head Lift and Muscle Weakness, Prior to Discharge From the Recovery RoomConsciousness: Awake and oriented43 Participants
Vecuronium + NeostigmineNumber of Participants With Clinical Signs of Recovery Assessed by Level of Consciousness, Head Lift and Muscle Weakness, Prior to Discharge From the Recovery RoomConsciousness: Responsive only to tactile stimuli0 Participants
Vecuronium + NeostigmineNumber of Participants With Clinical Signs of Recovery Assessed by Level of Consciousness, Head Lift and Muscle Weakness, Prior to Discharge From the Recovery RoomHas general muscle weakness0 Participants
Secondary

Number of Participants With Clinical Signs of Recovery Assessed by Level of Consciousness, Head Lift and Muscle Weakness, Prior to Transfer to the Recovery Room After Extubation

After anesthesia and prior to transfer to the recovery room after extubation, neuromuscular recovery was assessed by monitoring every 15 minutes the following clinical signs of recovery: level of consciousness (i.e., awake and oriented, arousable with minimal stimulation, responsive only to tactile stimulation); 5-second head lift test (ability to lift the head for 5 seconds); and general muscle weakness

Time frame: Day 1

Population: All randomized participants who received sugammadex or neostigmine and had at least one efficacy measurement.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Rocuronium + SugammadexNumber of Participants With Clinical Signs of Recovery Assessed by Level of Consciousness, Head Lift and Muscle Weakness, Prior to Transfer to the Recovery Room After ExtubationConsciousness: Awake and oriented30 Participants
Rocuronium + SugammadexNumber of Participants With Clinical Signs of Recovery Assessed by Level of Consciousness, Head Lift and Muscle Weakness, Prior to Transfer to the Recovery Room After ExtubationAble to perform the 5 second head lift38 Participants
Rocuronium + SugammadexNumber of Participants With Clinical Signs of Recovery Assessed by Level of Consciousness, Head Lift and Muscle Weakness, Prior to Transfer to the Recovery Room After ExtubationConsciousness: Responsive only to tactile stimuli2 Participants
Rocuronium + SugammadexNumber of Participants With Clinical Signs of Recovery Assessed by Level of Consciousness, Head Lift and Muscle Weakness, Prior to Transfer to the Recovery Room After ExtubationHas general muscle weakness3 Participants
Rocuronium + SugammadexNumber of Participants With Clinical Signs of Recovery Assessed by Level of Consciousness, Head Lift and Muscle Weakness, Prior to Transfer to the Recovery Room After ExtubationConsciousness: Arousable with minimal stimulation16 Participants
Rocuronium + NeostigmineNumber of Participants With Clinical Signs of Recovery Assessed by Level of Consciousness, Head Lift and Muscle Weakness, Prior to Transfer to the Recovery Room After ExtubationHas general muscle weakness9 Participants
Rocuronium + NeostigmineNumber of Participants With Clinical Signs of Recovery Assessed by Level of Consciousness, Head Lift and Muscle Weakness, Prior to Transfer to the Recovery Room After ExtubationConsciousness: Awake and oriented35 Participants
Rocuronium + NeostigmineNumber of Participants With Clinical Signs of Recovery Assessed by Level of Consciousness, Head Lift and Muscle Weakness, Prior to Transfer to the Recovery Room After ExtubationConsciousness: Arousable with minimal stimulation13 Participants
Rocuronium + NeostigmineNumber of Participants With Clinical Signs of Recovery Assessed by Level of Consciousness, Head Lift and Muscle Weakness, Prior to Transfer to the Recovery Room After ExtubationConsciousness: Responsive only to tactile stimuli0 Participants
Rocuronium + NeostigmineNumber of Participants With Clinical Signs of Recovery Assessed by Level of Consciousness, Head Lift and Muscle Weakness, Prior to Transfer to the Recovery Room After ExtubationAble to perform the 5 second head lift37 Participants
Vecuronium + SugammadexNumber of Participants With Clinical Signs of Recovery Assessed by Level of Consciousness, Head Lift and Muscle Weakness, Prior to Transfer to the Recovery Room After ExtubationConsciousness: Arousable with minimal stimulation17 Participants
Vecuronium + SugammadexNumber of Participants With Clinical Signs of Recovery Assessed by Level of Consciousness, Head Lift and Muscle Weakness, Prior to Transfer to the Recovery Room After ExtubationConsciousness: Awake and oriented29 Participants
Vecuronium + SugammadexNumber of Participants With Clinical Signs of Recovery Assessed by Level of Consciousness, Head Lift and Muscle Weakness, Prior to Transfer to the Recovery Room After ExtubationHas general muscle weakness4 Participants
Vecuronium + SugammadexNumber of Participants With Clinical Signs of Recovery Assessed by Level of Consciousness, Head Lift and Muscle Weakness, Prior to Transfer to the Recovery Room After ExtubationAble to perform the 5 second head lift40 Participants
Vecuronium + SugammadexNumber of Participants With Clinical Signs of Recovery Assessed by Level of Consciousness, Head Lift and Muscle Weakness, Prior to Transfer to the Recovery Room After ExtubationConsciousness: Responsive only to tactile stimuli2 Participants
Vecuronium + NeostigmineNumber of Participants With Clinical Signs of Recovery Assessed by Level of Consciousness, Head Lift and Muscle Weakness, Prior to Transfer to the Recovery Room After ExtubationHas general muscle weakness6 Participants
Vecuronium + NeostigmineNumber of Participants With Clinical Signs of Recovery Assessed by Level of Consciousness, Head Lift and Muscle Weakness, Prior to Transfer to the Recovery Room After ExtubationConsciousness: Responsive only to tactile stimuli5 Participants
Vecuronium + NeostigmineNumber of Participants With Clinical Signs of Recovery Assessed by Level of Consciousness, Head Lift and Muscle Weakness, Prior to Transfer to the Recovery Room After ExtubationAble to perform the 5 second head lift32 Participants
Vecuronium + NeostigmineNumber of Participants With Clinical Signs of Recovery Assessed by Level of Consciousness, Head Lift and Muscle Weakness, Prior to Transfer to the Recovery Room After ExtubationConsciousness: Awake and oriented26 Participants
Vecuronium + NeostigmineNumber of Participants With Clinical Signs of Recovery Assessed by Level of Consciousness, Head Lift and Muscle Weakness, Prior to Transfer to the Recovery Room After ExtubationConsciousness: Arousable with minimal stimulation14 Participants
Secondary

Time From Start of Administration of Sugammadex or Neostigmine to Recovery of the T4/T1 Ratio to 0.7

Neuromuscular functioning was monitored by applying repetitive TOF electrical stimulations to the ulnar nerve every 15 seconds and assessing twitch response at the adductor pollicis muscle. T1 and T4 refer to the amplitudes (heights) of the first and fourth twitches, respectively, after TOF nerve stimulation. The T4/T1 Ratio (expressed as a decimal of up to 1.0) indicates the extent of recovery from NMB. A faster time to recovery of the T4/T1 Ratio to 0.7 indicates a faster recovery from NMB.

Time frame: Day 1: From start of sugammadex or neostigmine administration to recovery of T4/T1 ratio to 0.7

Population: All randomized participants who received sugammadex or neostigmine and had at least one efficacy measurement. Imputed recovery times were used in cases of missing times.

ArmMeasureValue (MEAN)Dispersion
Rocuronium + SugammadexTime From Start of Administration of Sugammadex or Neostigmine to Recovery of the T4/T1 Ratio to 0.71.17 MinutesStandard Deviation 0.4
Rocuronium + NeostigmineTime From Start of Administration of Sugammadex or Neostigmine to Recovery of the T4/T1 Ratio to 0.79.60 MinutesStandard Deviation 8.23
Vecuronium + SugammadexTime From Start of Administration of Sugammadex or Neostigmine to Recovery of the T4/T1 Ratio to 0.71.68 MinutesStandard Deviation 0.57
Vecuronium + NeostigmineTime From Start of Administration of Sugammadex or Neostigmine to Recovery of the T4/T1 Ratio to 0.79.52 MinutesStandard Deviation 10.15
Secondary

Time From Start of Administration of Sugammadex or Neostigmine to Recovery of the T4/T1 Ratio to 0.8

Neuromuscular functioning was monitored by applying repetitive TOF electrical stimulations to the ulnar nerve every 15 seconds and assessing twitch response at the adductor pollicis muscle. T1 and T4 refer to the amplitudes (heights) of the first and fourth twitches, respectively, after TOF nerve stimulation. The T4/T1 Ratio (expressed as a decimal of up to 1.0) indicates the extent of recovery from NMB. A faster time to recovery of the T4/T1 Ratio to 0.8 indicates a faster recovery from NMB.

Time frame: Day 1: From start of sugammadex or neostigmine administration to recovery of T4/T1 ratio to 0.8

Population: All randomized participants who received sugammadex or neostigmine and had at least one efficacy measurement. Imputed recovery times were used in cases of missing times.

ArmMeasureValue (MEAN)Dispersion
Rocuronium + SugammadexTime From Start of Administration of Sugammadex or Neostigmine to Recovery of the T4/T1 Ratio to 0.81.32 MinutesStandard Deviation 0.48
Rocuronium + NeostigmineTime From Start of Administration of Sugammadex or Neostigmine to Recovery of the T4/T1 Ratio to 0.815.32 MinutesStandard Deviation 14.38
Vecuronium + SugammadexTime From Start of Administration of Sugammadex or Neostigmine to Recovery of the T4/T1 Ratio to 0.82.12 MinutesStandard Deviation 0.87
Vecuronium + NeostigmineTime From Start of Administration of Sugammadex or Neostigmine to Recovery of the T4/T1 Ratio to 0.815.33 MinutesStandard Deviation 13.37

Source: ClinicalTrials.gov · Data processed: Mar 30, 2026