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CompletedNCT02530242SCDCOUpdated Jun 9, 2021Results posted

Carbon Monoxide Measurement to Screen for Sickle Cell Disease

An interventional study of End-tidal Carbon Monoxide Subjects and End-tidal Carbon Monoxide Controls in Sickle Cell Anemia, sponsored by UCSF Benioff Children's Hospital Oakland. Completed. Open to participants aged 1 Year to 18 Years. Per ClinicalTrials.gov, last updated 2021-06-09.

Sponsored by UCSF Benioff Children's Hospital Oakland · Not applicable, Interventional, and Diagnostic

Phase
Not applicable
Study type
Interventional
Enrollment
32
Allocation
Non-randomized
Ages
1 Year to 18 Years
Sex
All
01

Study summary

Modify the design of the CoSense device (Model C20112, currently cleared by the FDA for ETCO (end-tidal carbon monoxide) monitoring to improve accuracy and consistency under temperature conditions encountered in countries with high prevalence of SCD (Sickle Cell Disease).

Read the detailed description

Increase the temperature operating range of ETCO measurements to 5 to 45°C. The signal output-to-CO (carbon monoxide) concentration correlation of the CO sensor is dependent on temperature. The new algorithm will be a different approach because the current algorithm is at the limits of its capability. We will establish the new specifications by determining performance in a bench model under simulated temperature conditions. We will then determine the ability of the modified device to distinguish between SCD and healthy controls. During this initial testing, we will examine the validity of ETCO measurements under regulated room temperature in the hospital setting. We will enroll 20 subjects, 10 each in the SCD arm and control arm to determine the mean and variance of the ETCO values.

02

Conditions studied

  • Sickle Cell Anemia

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Keywords

  • Sickle Cell Anemia
03

In context

Anemia, Sickle Cell

1,125 studies on the registry are indexed under Anemia, Sickle Cell; 239 are open to participants now.

This study's enrollment of 32 is below the median of 40 across 762 interventional studies indexed under Anemia, Sickle Cell.

Browse Anemia, Sickle Cell studies →

Lead sponsor

UCSF Benioff Children's Hospital Oakland is the lead sponsor of 55 studies on the registry; none are open to participants now.

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

04

Who can participate

Ages eligible
1 Year to 18 Years
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

  • Parental / legal guardian consent
  • Subject assent for participants ages 7 and above
  • Male and female children ages 1-18 years old
  • For Hb SS (Homozygous sickle cell anemia) subjects, hemoglobin baseline hemoglobin ≤10 g/dL based upon average hemoglobin value in past year

Exclusion criteria

Exclusion Criteria:

  • Subjects must not meet any of the following exclusion criteria to be considered eligible for study enrollment:
  • Had a red blood cell transfusion within 8 weeks prior to enrollment
  • Currently a primary smoker or was a primary smoker within 4 weeks prior to enrollment
  • Exposed to second hand smoke within 24 hours prior to breath sample collections
  • Have current upper respiratory infection or symptomatic asthma
  • For healthy subjects, known to have the sickle cell trait by electrophoresis or genetic testing
05

Study design

Phase
Not applicable
Primary purpose
Diagnostic
Allocation
Non-randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
32 participants (actual)

Study arms

  • Other
    End-tidal Carbon Monoxide Subjects

    Children between 1-18 years old with Sickle Cell Anemia

    Device: End-tidal Carbon Monoxide Subjects

  • Other
    End-tidal Carbon Monoxide Controls

    Healthy children age matched with subjects.

    Device: End-tidal Carbon Monoxide Controls

Interventions

  • DeviceEnd-tidal Carbon Monoxide Subjects

    ETCO monitor will be used to measure CO levels in subjects and controls.

  • DeviceEnd-tidal Carbon Monoxide Controls

    ETCO monitor will be used to measure CO levels in subjects and controls.

06

What researchers measure

Primary outcomes

  1. End-Tidal Carbon Monoxide

    Compare ETCO between subjects and controls

    Time frame: 1 hour

07

Results

Posted Oct 19, 2020
Limitations and caveats
A limitation of the data is the small number of subjects and that it was conducted under controlled circumstances in the clinic.

Participant flow

Participant flow — Overall Study
MilestoneEnd-tidal Carbon Monoxide SubjectsEnd-tidal Carbon Monoxide Controls
Started1616
Completed1615
Not completed01
Withdrew: Excluded due to asthma and oxcarbazepine01

Outcome measures

PrimaryEnd-Tidal Carbon Monoxide

Compare ETCO between subjects and controls

Time frame:
1 hour
Reported as:
Median · ppm
End-Tidal Carbon Monoxide
ppmEnd-tidal Carbon Monoxide SubjectsEnd-tidal Carbon Monoxide Controls
End-Tidal Carbon Monoxide4.35 (1.8 to 9.7).80 (.2 to 2.3)

Adverse events

Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
End-tidal Carbon Monoxide Subjects0/16 (0%)0/16 (0%)0/16 (0%)
End-tidal Carbon Monoxide Controls0/16 (0%)0/16 (0%)0/16 (0%)

Baseline characteristics

Age, Continuous
Age, Continuous(years)End-tidal Carbon Monoxide SubjectsEnd-tidal Carbon Monoxide ControlsTotal
Mean9.4 (5 to 14)9.7 (5 to 14)9.5 (5 to 14)
Sex: Female, Male
Sex: Female, Male(Participants)End-tidal Carbon Monoxide SubjectsEnd-tidal Carbon Monoxide ControlsTotal
Female111122
Male5510
Race and Ethnicity Not Collected
Race and Ethnicity Not Collected(Participants)End-tidal Carbon Monoxide SubjectsEnd-tidal Carbon Monoxide ControlsTotal
Count of participants——0
Region of Enrollment
Region of Enrollment(participants)End-tidal Carbon Monoxide SubjectsEnd-tidal Carbon Monoxide ControlsTotal
United States161632
08

Study locations

No study locations are listed for this record.

09

References and documents

Publications

  • Lal A, Patterson L, Goldrich A, Marsh A. Point-of-care end-tidal carbon monoxide reflects severity of hemolysis in sickle cell anemia. Pediatr Blood Cancer. 2015 May;62(5):912-4. doi: 10.1002/pbc.25447. Epub 2015 Feb 14. PubMed 25683629 ↗
10

Timeline

Tracking since Sep 25, 2026
Not marked actual or estimatedDates not marked actual or estimated

The record gives a start of Jul 2015, a primary completion of Oct 2015 and a completion of Dec 2015. It does not say whether these dates are actual or estimated.

Results were first posted in Oct 2020, 5 years after primary completion.

How these figures are worked out, and which studies are left out of them.

Registered
Aug 19, 2015
First posted
Aug 21, 2015
Start
Jul 2015
Primary completionActual
Oct 2015
CompletionActual
Dec 2015
Results first posted
Oct 19, 2020
Last update
Jun 9, 2021
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Jun 9, 2021, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT02530242
Lead sponsor
UCSF Benioff Children's Hospital Oakland
Collaborators
Capnia, Inc.
Responsible party
Sponsor
First posted
Aug 21, 2015
Start date
Jul 2015
Primary completion
Oct 2015
Completion
Dec 2015
Results posted
Oct 19, 2020
Last update
Jun 9, 2021

Study contacts

Ashutosh Lal, MD
principal investigator · Children's Hospital & Research Center at Oakland

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in May 2021. You cannot join it, but the record below documents what was studied.

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