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Knee drain debate: new study questions pain relief benefit

NCT ID NCT07175883

Knowledge-focused Sponsor: Hospital Universitario Reina Sofia de Cordoba 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
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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 26, 2026 · Last updated Jun 26, 2026

Summary

This study looked at whether placing a drain in the knee after total knee replacement reduces early postoperative pain. Sixty patients over age 60 were randomly assigned to receive a drain or not. Pain was measured before surgery and at discharge using a 0-10 scale. The goal is to clarify if drains help with pain, since current evidence is mixed.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Redon drain (a surgical drain placed in the knee after surgery)
What this could lead to
If the study shows no pain benefit from drains, surgeons may stop using them, simplifying recovery and reducing costs.
What could go wrong
This is a small, single-center study with only 60 patients, so results may not apply to all knee replacement surgeries. Pain is subjective and hard to measure precisely.

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

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

60 people

The number who actually took part.

Started

Jan 2025

Finished

Mar 2025

Lead sponsor

A government agency

The lead sponsor is a government body.

Who can take part

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

Ages

60 years and older

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: * Patients over 60 years of age * Candidates for hybrid total knee arthroplasty with preservation of the posterior cruciate ligament Exclusion Criteria: * Patients with previous ipsilateral or contralateral knee surgery (contralateral knee arthroplasty, osteotomized, previous cruciate ligament or meniscal repair included) * History of rheumatologic diseases * History of articular infection

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Conditions

The condition(s) this trial relates to.

osteoarthritis, knee Pain, Postoperative

As listed by the trial registrant

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

Arthropathy of knee Postoperative pain

Contacts and locations

Locations

  • Hospital Unievrsitario Reina Sofia de Córdoba

    Córdoba, CORDOBA, 14004, Spain

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