Clearance Of Mucus In Stents (COMIS)

August 24, 2023 updated by: M.D. Anderson Cancer Center
The goal of this clinical research study is to compare the effects of sodium bicarbonate to normal saline when used for clearing mucus blockage in patients with airway stents.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Study Agents:

Sodium bicarbonate is also called baking soda. In this study it will be mixed with water.

Normal saline is a salt water solution.

Study Groups:

If you agree to take part in this study, you will be randomly assigned (as in the flip of a coin) to 1 of 2 study groups. The study doctor will use either sodium bicarbonate or normal saline during your bronchoscopy to clear mucus from your stent:

  • If you are in Group 1, the study doctor will use sodium bicarbonate. The amount of sodium bicarbonate in the solution will be the same for all patients in Group 1.
  • If you are in Group 2, the study doctor will use normal saline.

You will have an equal chance of being assigned to either group. Neither you nor the study staff can choose the group you will be in, and neither you nor your doctor will know if you are receiving sodium bicarbonate or normal saline. However, if needed for your safety, the study staff will be able to find out what you are receiving.

If you have more than 1 stent, only 1 of your stents will be checked for clearance of mucus in this study. However, all stents will be cleared of mucus if needed.

As part of your standard of care, you will have photographs and videos taken before and after your bronchoscopy. You will sign a separate consent form for your bronchoscopy. Your complete medical history will also be recorded.

For the bronchoscopy, you will be given drugs to help you relax, and then a local anesthetic will be sprayed into your nose and throat to numb those areas. A slim, flexible tube with a light will be placed through your nose or mouth and into your airway tubes.

If you are in Group 1, a small amount of sodium bicarbonate will be sprayed into your stent/airway tubes and then suctioned out through the bronchoscope.

If you are in Group 2, a small amount of normal saline will be sprayed into your stent/airway tubes and then suctioned out through the bronchoscope.

Next, 3 study doctors will check how well the mucus in your stent was cleared. If the study doctors think not enough mucus has been cleared from your stent, you will "crossover" into the other study group and receive the other agent to clear your mucus.

Length of Study:

Your participation on the study will be over after you have completed the follow-up visits.

Follow-Up:

At about 7 days, and then again 30 days after your bronchoscopy, you will come to the clinic for a follow-up visit. The following procedures will be performed:

  • You will have a physical exam, including measurement of your vital signs (blood pressure, heart rate, temperature, and breathing rate).
  • You will also be asked about any side effects you may be having.

This is an investigational study. Normal saline and sodium bicarbonate are agents used in bronchoscopies performed in patients with airway stents as standard of care. The comparison of sodium bicarbonate to normal saline to clear mucus from airway stents is considered investigational.

Up to 40 patients will take part in this study. All will be enrolled at MD Anderson.

Study Type

Interventional

Enrollment (Actual)

43

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • Texas
      • Houston, Texas, United States, 77030
        • University of Texas MD Anderson Cancer Center

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

  1. Adult patients (>/= 18 years) with airway stents undergoing bronchoscopy.
  2. Patients previously enrolled, but excluded as no stent lumen obstruction from mucus retention identified at earlier enrollment (hence excluded at that enrollment) .

Exclusion Criteria:

  1. Patients with history of allergy or adverse reactions to sodium bicarbonate or normal saline.
  2. Patients refusing to sign informed written consent for participation in research.
  3. Patients with no stent lumen occlusion from mucus impaction as determined at the time of the initial visual bronchoscopic assessment.
  4. Previously enrolled patients who completed this protocol.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Diagnostic
  • Allocation: Randomized
  • Interventional Model: Crossover Assignment
  • Masking: Double

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Active Comparator: Normal Saline
Normal saline sprayed into stent/airway tubes then suctioned out through bronchoscope.
Other: Normal Saline
Normal saline administered in stent/airway tubes under direct visualization via the bronchoscope.
Other Names:
  • Salt water
Active Comparator: Sodium Bicarbonate
Sodium bicarbonate sprayed into stent/airway tubes then suctioned out through bronchoscope.
Other: Sodium Bicarbonate
4.2% bicarbonate solution mixed with equal volume of sterile water administered into stent/airway tubes under direct visualization via the bronchoscope.
Other Names:
  • Baking soda

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Percentage of obstruction resolution as Good or Excellent
Time Frame: Baseline to 7 days
Response/efficacy of sodium bicarbonate versus normal saline in airway stents graded using scale. Percentage of obstruction resolution (relative to initial stent lumen obstruction by mucus): Good response 51-75% clearance; and Excellent 76 - 100% clearance. The Mantel-Haenszel chi-square test stratified by degree of lumen obstruction at study enrollment used to compare response (good or excellent obstruction resolution) rates between treatment arms.
Baseline to 7 days

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

M.D. Anderson Cancer Center

Investigators

  • Principal Investigator: Carlos A. Jimenez, MD, M.D. Anderson Cancer Center

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

Helpful Links

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

June 16, 2011

Primary Completion (Actual)

August 23, 2023

Study Completion (Actual)

August 23, 2023

Study Registration Dates

First Submitted

June 8, 2011

First Submitted That Met QC Criteria

June 8, 2011

First Posted (Estimated)

June 9, 2011

Study Record Updates

Last Update Posted (Actual)

August 25, 2023

Last Update Submitted That Met QC Criteria

August 24, 2023

Last Verified

August 1, 2023

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 2010-0990
  • NCI-2011-01119 (Registry Identifier: NCI CTRP)

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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