Reversing muscle relaxation during general anesthesia

Reversal of Neuromuscular Blockade During the General Anaesthesia

NA · Tampere University Hospital · NCT04048655

This study is testing if some patients experience unexpected muscle relaxation after their anesthesia is reversed during surgery to see how common it is.

Quick facts

PhaseNA
Study typeInterventional
Enrollment120 (estimated)
Ages18 Years to 65 Years
SexAll
SponsorTampere University Hospital (other)
Locations1 site (Tampere)
Trial IDNCT04048655 on ClinicalTrials.gov

What this trial studies

This study investigates the phenomenon of spontaneous muscle relaxation occurring after the reversal of neuromuscular blockade with neostigmine in patients undergoing elective surgery. It aims to monitor the recovery of neuromuscular function induced by rocuronium using train of four stimulations and electromyography. After administering the reversal agent, the study will observe patients for an additional 30 minutes to determine if the train of four ratio falls below the safe level of 90%. The goal is to calculate the incidence of this post-recovery relaxation phenomenon.

Who should consider this trial

Good fit: Ideal candidates are adults undergoing elective surgeries requiring general anesthesia with a body mass index less than 35 kg/m².

Not a fit: Patients with central nervous system diseases, trauma, or conditions affecting the peripheral nervous system may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could improve the safety and effectiveness of neuromuscular blockade reversal during surgeries.

How similar studies have performed: While there have been individual reports on this phenomenon, this study represents a novel approach to systematically assess its incidence.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Elective surgery requiring general anaesthesia
* Surgery is assumed to last more than 45 minutes
* Body mass index less than 35kg/ m²

Exclusion Criteria:

* Disease of central nervous system
* Trauma of central nervous system
* Disease affecting peripheral nervous system
* Medication affecting peripheral nervous system

Where this trial is running

Tampere

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.

View on ClinicalTrials.gov →

Conditions: Neuromuscular Blockade, neuromuscular blockade, neostigmine, muscle relaxation, train of four, rocuronium

Last reviewed 2026-05-15 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.