ClinicalTrials.gg
RecruitingNCT06427538RELIEFUpdated Feb 20, 2026

Chest Drain Regular Flushing in Complicated Parapneumonic Effusions and Empyemas

An interventional study of Saline Flush in Empyema, Pleural and Pleural Infection, sponsored by Vanderbilt University Medical Center. Recruiting at 5 sites in United States. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-02-20.

Sponsored by Vanderbilt University Medical Center · Not applicable, Interventional, and Treatment

From the registry’s dates

  • Started Jun 2024; still recruiting 2 years 4 months later.
Phase
Not applicable
Study type
Interventional
Enrollment
96
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Study summary

Infections of the pleural space are common, and patients require antibiotics and chest drain placement to evacuate the chest from the infected fluid. Chest drains can get blocked by the drainage fluid and material. For this reason, it is thought that flushing the chest drain with saline solution, can help maintain the patency of the tube. This proposed study will evaluate the impact of regular chest drain flushing on the length of time to chest tube removal and total hospitalization as well as improvement in chest imaging and the need for additional interventions on the infected space.

Read the detailed description

There are no randomized controlled trials (RCTs) evaluating the role of regular chest tube flushing in the setting of pleural space infection for optimal drainage and treatment outcomes. Most studies of \<16 Fr catheters have used both flushing and suction to decrease the likelihood of catheter blockage and improve drainage efficiency, however, this practice has never been studied prospectively or in RCTs. Regular flushing (e.g., 20-30 ml saline every 6 h via a three-way tap) is recommended for small chest drains by the British Thoracic Society (BTS) 2010 Guidelines. This practice is followed variably by some and not used by others. Importantly, the role of this practice in successful drainage of infected fluid, and patient-centric outcomes has not been investigated. Inconsistent flushing practices confound the interpretation of therapeutic modalities (such as intrapleural tissue plasminogen activator and deoxyribonuclease therapy) success or lack thereof and limit the execution of RCTs and prospective studies of the pleural space in the setting of infection.

02

Conditions studied

  • Empyema, Pleural
  • Pleural Infection

Keywords

  • empyema
  • pleural infection
  • chest tube
  • saline flush
03

In context

Empyema, Pleural

33 studies on the registry are indexed under Empyema, Pleural; 11 are open to participants now.

This study's planned enrollment of 96 is above the median of 77 across 26 interventional studies indexed under Empyema, Pleural.

Browse Empyema, Pleural studies →

Lead sponsor

Vanderbilt University Medical Center is the lead sponsor of 833 studies on the registry; 155 are open to participants now.

Of its 125 completed or terminated interventional studies of FDA-regulated products, 92 (74%) have results posted.

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

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Patients with complicated parapneumonic pleural effusion and empyema requiring chest tube placement as standard of care for inpatient management of their pleural space infection with or without intrapleural tissue plasminogen activator and deoxyribonuclease therapy
  • Age > 18 years old.

Exclusion criteria

Exclusion Criteria:

  • Patients who have surgical tubes that can't accommodate a three-way stopcock.
  • Study subject has any disease or condition that interferes with the safe completion of the study.
  • Inability to provide .
  • Inability to undergo a chest X-ray.
  • If the managing clinician believes the chest tube will be placed for less than 24 hours.
  • Patients with an indwelling pleural catheter (IPC)
Terms in these criteria, in plain language(1)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Sequential assignment
Masking
None (open label)
Enrollment
96 participants (estimated)

Study arms

  • Experimental
    Saline Intervention Arm

    Patient will receive 20 mL sterile saline flushes into their catheter by study team members every 6 ± 2 hours. If patients are receiving intrapleural tissue plasminogen activator and deoxyribonuclease therapy, each treatment will be considered one flush.

    Other: Saline Flush

  • No intervention
    No Intervention Arm

    Patient will receive a saline flush as needed, to restore patency of a chest tube considered blocked. No routine flushes will be administered.

Interventions

  • OtherSaline Flush

    sterile saline 20 mL flushed into their catheter by trained nurses or study team members every 6 ± 2 hours

06

What researchers measure

Primary outcomes

  1. Time to chest tube removal

    The investigators will assess the time from randomization (within 24 hours of chest tube placement) until time to chest tube removal

    Time frame: up to 3 months

Secondary outcomes

  1. Length of hospitalization

    Time frame: up to 365 days

  2. Radiographic improvement as evidenced by chest x-ray at the time of chest tube placement compared to the time of removal

    Time frame: through study completion, an average of 3 months

  3. Additional surgical procedures for the management of pleural space infection

    number of additional procedures through study completion

    Time frame: an average of 3 months

  4. Complications

    Time frame: through study completion, an average of 3 months

07

Study locations

5 of 5 sites recruiting
08

References and documents

Publications

  • Boyle TK, Duke JD, Yermakhanova G, Paez R, Bridwell G, Ratwani AP, Leonard KM, Chen H, Harrell FE Jr, Lentz RJ, Maldonado F, Rahman NM, Shojaee S. Chest drain REgular FLushing in ComplIcated parapneumonic EFfusions and empyemas: Study protocol for the RELIEF randomized controlled trial. PLoS One. 2026 Mar 5;21(3):e0331725. doi: 10.1371/journal.pone.0331725. eCollection 2026. PubMed 41785244 ↗

Individual participant data

Plan to share: No — Deidentified data will be shared with other researchers

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Feb 20, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT06427538
Responsible party
Samira Shojaee (Associate Professor of Medicine, Vanderbilt University Medical Center) — Principal investigator
First posted
May 24, 2024
Start date
Jun 21, 2024
Primary completion
Dec 30, 2026 (estimated)
Completion
Dec 30, 2026 (estimated)
Last update
Feb 20, 2026

Study contacts

Samira Shojaee, MD, MPH
Contact
samira.shojaee@vumc.org
615-322-2386
Jennifer Duke, MD
Contact
jennifer.duke@vumc.org
615-322-2386
Jennifer D Duke, MD
study director · Vanderbilt University

Oversight

FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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