Studybox Research CLIA Waiver Studies

Point-of-Care Complete Blood Count

Accuracy in the hands of untrained intended-use operators at waived sites.

Studybox

CLIA Waiver Studies

A complete blood count is many tests in one, and a point-of-care CBC study is correspondingly a set of parallel method comparisons, one per parameter, against a laboratory hematology analyzer. The first waived CBC analyzer established the model: a restricted intended use, a limited set of reported parameters with defined reportable ranges, and a flagging system that directs any result outside those ranges or suggestive of abnormality to laboratory testing rather than reporting a number. The clinical study has to show both that the numbers are accurate in the reportable range and that the flags fire when they should.

Enrollment therefore needs two kinds of subjects: people with normal results, who confirm accuracy where most results fall, and people with abnormal results, who exercise the flagging. The latter come from oncology, hematology, infectious disease and pediatric populations and must be recruited deliberately, because a healthy walk-in population will not test the low end of the platelet or white cell range.

Analyte: White blood cell count, red blood cell count, hemoglobin, hematocrit, platelet count, red cell indices and, where claimed, white blood cell differential
Therapeutic area: Hematology
Specimens: Venous Whole Blood, Capillary Fingerstick Blood
Intended-use settings: physician office, urgent care, hospital POC, emergency department
Operators: Medical assistants and nurses in physician offices and urgent care centers for waived versions; laboratory and point-of-care staff for moderate-complexity versions.
Comparator: Typically a laboratory hematology analyzer with documented calibration, with a manual microscopic differential as the reference for white cell differential parameters where claimed.

CLIA Waiver Studies specifics

What Changes for This Assay on This Pathway.

The waived intended use is typically restricted (for example to a minimum patient age and to patients who are not critically ill), and the flagging system is central to the simplicity and insignificant-risk argument; the waiver study must show that untrained operators receive and act on flags correctly.
Flex studies for a cartridge-based CBC typically stress sample volume and application, mixing, delay between collection and loading, and instrument environment.
Untrained-operator precision for each parameter at multiple waived sites is extensive compared with single-analyte devices and should be planned as a substantial component of the study.

Endpoints the study must support

Method comparison for each reported parameter against the laboratory analyzer across its measuring range, with bias at clinical decision thresholds
Imprecision for each parameter at low, normal and high levels, including by untrained operators at waived sites
Flagging agreement: the device's identification of results outside its reportable range or requiring laboratory follow-up, compared with the laboratory result
Agreement of capillary fingerstick with venous results on the device

Enrollment realities

Driven by coverage of each parameter's range and by the number of abnormal results needed to evaluate flagging; this typically requires specialty clinic recruitment and makes CBC studies larger and longer than single-analyte hematology studies.

How Studybox runs it

Pre-Qualified Sites, Embedded Coordinators.

Waiver evidence depends on genuine intended-use operators in genuine waived settings. Our network of 100+ pre-qualified urgent care, physician office, and point-of-care sites already runs IVD protocols, so operator recruitment and site activation don't start from zero. How we run clia waiver studies →

Same assay, other pathways

Relevant FDA guidance

FAQ

Point-of-Care Complete Blood Count Study Questions.

01 Who operates the point-of-care complete blood count in a clia waiver studies study?

Medical assistants and nurses in physician offices and urgent care centers for waived versions; laboratory and point-of-care staff for moderate-complexity versions.

02 What is the comparator for a point-of-care complete blood count study?

Typically a laboratory hematology analyzer with documented calibration, with a manual microscopic differential as the reference for white cell differential parameters where claimed.

03 What drives enrollment for a point-of-care complete blood count study?

Let's talk IVD research

Planning a point-of-care complete blood count study?

Tell us the intended use and setting. We'll come back with a site plan, operator strategy, and a realistic activation timeline for the clia waiver studies pathway.