Exhaled Carbon Monoxide as a Marker of Hemolysis in Sickle Cell Disease- an Exploratory Study

December 21, 2016 updated by: Jane Little, University Hospitals Cleveland Medical Center
The investigators propose to evaluate etCO in patients with HbSS, HbSC, and HbS-beta thalassemia during routine clinic visits, and longitudinally. Our goal is to know whether etCO differs amongst subjects with different sickle cell syndrome genotypes, and whether it is a stable marker of hemolytic rate, as reflected in routine labs obtained for clinical care (including total hemoglobin, reticulocyte count, lactate dehydrogenase, and, when sampled, total and direct bilirubin). We hope to establish whether this inexpensive and non-invasive test faithfully reflects hemolytic parameters in sickle cell syndromes.

Study Overview

Status

Withdrawn

Conditions

Detailed Description

This is an observational study of sickle cell patients with the aim to measure exhaled carbon monoxide levels and to correlate with genotype and standard clinical markers of hemolysis.

Upon enrollment and at each subsequent visit, if acceptable to the patient, each subject will undergo measurement of exhaled carbon monoxide utilizing a hand held carbon monoxide monitor, MicroCO/Smoke check. Subsequent evaluations may be obtained during a routine visit, while hospitalized for a vasocclusive crises (VOC) episode, or when evaluated in the acute care clinic.

The principal study objective is to assess if exhaled carbon monoxide levels are a non-invasive marker of hemolysis in subjects with sickle cell disease (SCD).

The secondary study objective is to assess exhaled carbon monoxide levels serially in subjects with SCD, relative to vasocclusive crises, transfusion requirements, and pain syndromes.

The one inclusion criteria is for all adult sickle patients presenting for follow up at the outpatient sickle cell clinic who are capable of following simple instructions.

The exclusion criteria are a recent (2 week) history of lung infection, asthma, acute chest syndrome, or COPD exacerbation and/or a significant pulmonary dysfunction in the recent (3-6 month) past.

Study Type

Observational

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
    • Ohio
      • Cleveland, Ohio, United States, 44106
        • Seidman Cancer Center, University Hospitals

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

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

Adult sickle cell patients from hematology clinics at UHCMC Seidman Cancer Center would be recruited for serial measurements of exhaled CO levels, at baseline and during painful vaso-occlusive (VOC) episodes.

Description

Inclusion Criteria:

All adult sickle patients presenting for follow up at the outpatient sickle cell clinic who are capable of following simple instructions.

Exclusion Criteria:

A recent (2 week) history of lung infection, asthma, acute chest syndrome, or COPD exacerbation and/or a significant pulmonary dysfunction in the recent (3-6 month) past.

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

Cohorts and Interventions

Group / Cohort
Sickle Cell Patients
Patients with Sickle Cell, over 18 years of age

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Exhaled Carbon Monoxide Level and hemolysis markers
Time Frame: Participants will be followed for the duration of two years, at baseline clinically, or while hospitalized for a VOC episode, or when evaluated in the acute care clinic for pain or symptom exacerbation.
Exhaled Carbon Monoxide Levels will be measured serially, at clinical baseline and with symptom exacerbation.
Participants will be followed for the duration of two years, at baseline clinically, or while hospitalized for a VOC episode, or when evaluated in the acute care clinic for pain or symptom exacerbation.

Collaborators and Investigators

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

Sponsor

University Hospitals Cleveland Medical Center

Investigators

  • Principal Investigator: Jane Little, MD, University Hospitals Cleveland Medical Center

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

June 1, 2013

Primary Completion (Actual)

December 1, 2016

Study Completion (Actual)

December 1, 2016

Study Registration Dates

First Submitted

June 19, 2013

First Submitted That Met QC Criteria

June 25, 2013

First Posted (Estimate)

June 28, 2013

Study Record Updates

Last Update Posted (Estimate)

December 23, 2016

Last Update Submitted That Met QC Criteria

December 21, 2016

Last Verified

December 1, 2016

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 03-12-41

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

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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