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Heart rate may predict paralysis drug speed in surgery

NCT ID NCT07168252

Knowledge-focused Sponsor: Clare Hayes-Bradley Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting This study
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study aims to create a mathematical model that predicts how quickly the muscle relaxant rocuronium takes effect based on a patient's heart function (cardiac output). Researchers will enroll 32 adults undergoing general anesthesia to measure time to paralysis and heart output. The goal is to improve intubation safety by tailoring drug doses.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Phase 4

Runs after approval, following long-term safety and how well the treatment works in everyday use.

Participants

About 32 people

The number the study aims to enrol. It can still change while the study runs.

Expected to start

Dec 2025

An estimate. Start dates often move.

Expected to finish

Dec 2026

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 to 65 years

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * General anaesthesia utilising an arterial line and rocuronium at an approved study site hospital (WSLHD - Blacktown \& Mount Druitt hospitals) * Expected procedure duration \>1.5 hours * no contraindications to rocuronium neuromuscular blockade * no contraindications to propofol TCI anaesthesia Exclusion Criteria: * Unable to consent for themselves for procedure * Need for hospital interpreter (not currently funded for research use) * pregnancy or lactation * BMI \> 50 * neuromuscular condition (e.g. affecting muscle or neuromuscular junction) * renal failure (eGFR \<30) * chronic liver failure diagnosis * epilepsy or antiepileptics * lithium * Atrial Fibrillation/Aflutter (regular rhythm needed for cardiac output monitor) * gentamicin administered before induction

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Conditions

The condition(s) this trial relates to.

Muscle Hypotonia

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Induction of anaesthesia Muscle relaxants Rocuronium

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  2. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

More trials for these conditions

Other studies related to the condition(s) this trial covers.