COULTER LH 780 HEMATOLOGY ANALYZER

K061616 · Beckman Coulter, Inc. · GKZ · Oct 4, 2006 · Hematology

Device Facts

• Record ID: K061616
• Device Name: COULTER LH 780 HEMATOLOGY ANALYZER
• Applicant: Beckman Coulter, Inc.
• Product Code: GKZ · Hematology
• Decision Date: Oct 4, 2006
• Decision: SESE
• Submission Type: Abbreviated
• Regulation: 21 CFR 864.5220
• Device Class: Class 2

Indications for Use

The COULTER LH 780 Hematology analyzer is a quantitative, automated hematology analyzer and leukocyte differential counter for In Vitro Diagnostic Use in clinical laboratories. The COULTER LH 780 Hematology Analyzer provides automated reticulocyte analysis and enumeration of nucleated red blood cells (NRBCs) as well as an automated method for enumeration of RBCs and WBCs in body fluids.

Device Story

The COULTER LH 780 is an automated hematology analyzer for clinical laboratory use. It processes whole blood and body fluid samples to provide quantitative hematological parameters, including CBC, leukocyte differential, NRBCs, and reticulocytes. The system utilizes the Coulter Principle, hemoglobinometry, and VCS technology to analyze cell size, volume, and conductivity. It incorporates automated quality control, calibration, and cleaning cycles. The device identifies patients requiring further clinical investigation by flagging abnormal parameters. Results are displayed for healthcare providers to assist in diagnosing patient conditions. The system includes an advanced barcode reader, RBC correction, and graphical histogram limits. It supports remote diagnostics via ProService and integrates with optional slide makers and stainers.

Clinical Evidence

Bench testing only. Studies conducted to verify accuracy, precision, linearity, and carryover performance against manufacturer specifications. Results demonstrate performance equivalent to the predicate LH 750, with updated specifications for RDW-SD and improved WBC linearity.

Technological Characteristics

Automated hematology analyzer using electrical impedance (Coulter principle) and VCS (volume, conductivity, light scatter) technology. Measures CBC, differential, reticulocytes, and body fluid cells. Includes barcode reader, ProService remote diagnostics, and optional slide maker/stainer. Software-controlled with automated QC and calibration. Reagents include diluents, lysing agents, and cleaners.

Indications for Use

Indicated for patients requiring hematological analysis to separate normal patients from those needing additional studies, such as cell size/platelet distribution measurements, manual WBC differential, or other definitive diagnostic tests.

Regulatory Classification

Identification

An automated differential cell counter is a device used to identify one or more of the formed elements of the blood. The device may also have the capability to flag, count, or classify immature or abnormal hematopoietic cells of the blood, bone marrow, or other body fluids. These devices may combine an electronic particle counting method, optical method, or a flow cytometric method utilizing monoclonal CD (cluster designation) markers. The device includes accessory CD markers.

Special Controls

*Classification.* Class II (special controls). The special control for this device is the FDA document entitled “Class II Special Controls Guidance Document: Premarket Notifications for Automated Differential Cell Counters for Immature or Abnormal Blood Cells; Final Guidance for Industry and FDA.”

Predicate Devices

• COULTER® LH 750 Hematology Analyzer (K011342, K030606)
• Sysmex™ XE-2100 Automated Hematology Analyzer (K992875)

Submission Summary (Full Text)

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# 510(k) SUBSTANTIAL EQUIVALENCE DETERMINATION DECISION SUMMARY ASSAY AND INSTRUMENT COMBINATION TEMPLATE

A. 510(k) Number:
K061616

B. Purpose for Submission:
Modification of device to add new features. The new features are: RBC correction, Graphical representation of customer-definable high/low limits on the RBC histogram, advanced barcode reader, control folder filters, reproducibility and carryover not required as pre-calibration checks.

C. Measurand:
N/A

D. Type of Test:
The LH 780 Hematology Analyzer provides automated complete blood count, leukocyte differential, NRBC enumeration and reticulocyte analysis as well as an automated method for enumeration of RBCs and WBCs in body fluids.

E. Applicant:
Beckman Coulter

F. Proprietary and Established Names:
COULTER® LH 780 Hematology Analyzer

G. Regulatory Information:
1. Regulation section:
21 CFR 864.5220 Automated differential cell counter
2. Classification:
Class II

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3. Product code:
GKZ

4. Panel:
Hematology (81)

H. Intended Use:

1. Intended use(s):
The COULTER LH 780 Hematology analyzer is a quantitative, automated hematology analyzer and leukocyte differential counter for In Vitro Diagnostic Use in clinical laboratories. The COULTER LH 780 Hematology Analyzer provides automated reticulocyte analysis and enumeration of nucleated red blood cells (NRBCs) as well as an automated method for enumeration of RBCs and WBCs in body fluids.

2. Indication(s) for use:
The purpose of the LH 780 Hematology analyzer is to separate the normal patient, with all normal system-generated parameters, from the patient who needs additional studies of any of these parameters. These studies might include further measurements of cell size and platelet distribution, manual WBC differential or any other definitive test that helps diagnose the patient's condition.

3. Special conditions for use statement(s):
N/A

4. Special instrument requirements:
N/A

I. Device Description:
The COULTER LH 780 Hematology analyzer is a quantitative, automated hematology analyzer and leukocyte differential counter for In Vitro Diagnostic Use in clinical laboratories. The COULTER LH 780 Hematology Analyzer provides automated reticulocyte analysis and enumeration of nucleated red blood cells (NRBCs) as well as an automated method for enumeration of RBCs and WBCs in body fluids.

The purpose of the LH 780 Hematology analyzer is to separate the normal patient, with all normal system-generated parameters, from the patient who needs additional studies of any of these parameters. These studies might include further measurements of cell size and platelet distribution, manual WBC differential or any other definitive test that helps

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diagnose the patient's condition.

The instrument system is comprised of the analyzer and a suite of analytical reagents that allow for simultaneous quantitative determination of hemoglobin measurement, cell counting and sizing, reticulocyte determination, quality control calibration and cleaning.

## J. Substantial Equivalence Information:

1. Predicate device name(s):
a. COULTER® LH 750 Hematology Analyzer
b. Sysmex™ XE-2100 Automated Hematology Analyzer

2. Predicate 510(k) number(s):
a. K011342, K030606 (body fluids application)
b. K992875

3. Comparison with predicate:

| Similarities | | |
| --- | --- | --- |
| Item | Predicate | Device |
| Intended Use | See above under H. 1. | Same |
| Indications for Use | See above under H. 2. | Same |
| Method History | Coulter Principle, Hemoglobinometry, VCS technology, NRBC enumeration. | Same |
| Quality Controls & Calibrator | COULTER® 5C® Cell Control, COULTER® Latron™ Primer & Latron Control, COULTER® RETIC-C™ Cell Control, COULTER® LIN-C® linearity control, COULTER® S-CAL® CALIBRATOR KIT | Same |

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| Similarities | | |
| --- | --- | --- |
| Item | Predicate | Device |
| Analysis Reagents | COULTER® LH Series Diluent, COULTER® Isoton 4 diluent, COULTER® LH Series Pak, COULTER® LH Series RETIC PAK, COULTER® Lyse S® III lytic agent, COULTER® Lyse S® 4 lytic agent. | Same |
| Service Diagnostics | Uses ProService Remote Diagnostics | Same |
| Hardware Options | Graphic/Laser Printer, LH 700 Series SlideMaker, LH 700 Series SlideStainer | Same |
| Differences | | |
| --- | --- | --- |
| Item | Predicate | Device |
| IVD Parameters | WBC, RBC, Hgb, MCV, MCH, MCHC, RDW, Plt, MPV, LY%, MO%, NE%, EO%, BA%, LY#, MO#, NE#, EO#, BA#, NRBC%, NRBC#, RET%, RET#, IRF, & MRV | Same plus RDW-SD |
| Quality Control Techniques | Daily Instruments Check, Commercial Controls, Delta Checks, Patient Controls, XM Analysis, & IQAP | Same plus Extended QC & XM Analysis |
| Cleaning Agent | COULTER® CLENZ | Same plus COULTER® LH Series Cleaner |
| Performance Specifications | Within-Run precision (CBC, Diff, Retic), Accuracy (CBC,Diff, Retic), Linearity (WBC, RBC, Hgb, & Plt), Background (WBC, RBC, Hgb, & Plt), Operating and Reportable Ranges (CBC, Diff, Retic, NRBC), Mode to Mode | Same plus Within-Run precision, Accuracy, and operating and Reportable Ranges include RDW-SD and a tighter WBC Linearity specification. |

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| Differences |
| --- |
| Item | Predicate | Device |
| Uncorrected WBC (UWBC) | Comparison (WBC, RBC, Hgb, Plt). | Result reported in parameter block. |
| New Features Not Covered Above. | Result reported in a comment field.
N/A | • RBC Correction
• Graphical representation of customer-definable high/low limits on the RBC histogram
• Advanced bar-code filters
• Reproducibility and carryover not required as pre-calibration checks |

K. Standard/Guidance Document Referenced (if applicable):
Class II Special Controls Guidance Document: Premarket Notifications for Automated Differential Cell Counters for Immature or Abnormal Blood Cells; Final Guidance for Industry and FDA

L. Test Principle:
CBC analysis is based on the established Coulter principle method of automated cell counting and spectrophotometric hemoglobin determination. The Coulter method counts and sizes cells by detecting and measuring changes in electrical resistance when a particle (such as a cell) in a conductive liquid goes through a small aperture.

Each cell suspended in a conductive liquid (diluent) acts as an insulator. As each cell goes through the aperture, it momentarily increases the resistance of the electrical path between two submerged electrodes, one located on each side of the aperture. This causes an electrical pulse that can be counted and sized. While the number of pulses indicates particle count, the size of the electrical pulse is proportional to the cell volume.

Differential and reticulocyte analysis is based on the Coulter volume, conductivity and light scatter technology (VCS). Differential analysis classification and reticulocyte analysis occur in the flow cell, where: Low-frequency current measures volume; High-frequency current senses cellular internal content through measuring changes in conductivity; Light from the laser scattered off the individual cells characterizes cellular surface, shape, and reflectivity.

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M. Performance Characteristics (if/when applicable):

1. Analytical performance:

a. Precision/Reproducibility:
Precision testing was performed in accordance with CLSI/NCCLS EP5-A2, Evaluation of Precision Performance of Clinical Chemistry Devices; Approved Guideline and Class II Special Controls Guidance Document: Premarket Notifications for Automated Differential Cell Counters for Immature or Abnormal Blood Cells; Final Guidance for Industry and FDA. Acceptance criteria for each parameter were the performance specifications described in the Draft on-Line Help CD Rom, Section 13. Acceptance criteria were met.

b. Linearity/assay reportable range:
Linearity testing was performed in accordance with Class II Special Controls Guidance Document: Premarket Notifications for Automated Differential Cell Counters for Immature or Abnormal Blood Cell Types; Final Guidance for Industry and FDA. WBC, RBD, Hgb, and Plt linearity was evaluated by analyzing gravimetrically prepared dilutions of whole blood and analog preparations to cover the linear range. The values obtained were compared to the expected values for each dilution. Acceptance criteria for each parameter were the performance specifications described in the Draft on-Line Help CD Rom, Section 13. Acceptance criteria were met.

c. Traceability, Stability, Expected values (controls, calibrators, or methods):
N/A

d. Detection limit:
N/A

e. Analytical specificity:
N/A

f. Assay cut-off:
N/A

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2. Comparison studies:

a. Method comparison with predicate device:
Accuracy testing was performed in accordance with CLSI/NCCLS EP9-A, Method Comparison and Bias Estimation Using Patient Samples; Approved Guideline. Normal and clinical samples were analyzed on the test instruments and compared against a predicate device. Non-numeric and system alarms were excluded from data analysis. Accuracy was performed for CBC, Diff, and Reticulocyte parameters, results were compared to specifications. Acceptance criteria for each parameter were the performance specifications described in the Draft on-Line Help CD Rom, Section 13. Acceptance criteria were met.

b. Matrix comparison:
N/A

3. Clinical studies:

a. Clinical Sensitivity:
There are no acceptance criteria for clinical sensitivity. Analysis of normal and clinical samples was performed for internal validation.

b. Clinical specificity:
There are no acceptance criteria for clinical specificity. Analysis of normal and clinical samples was performed for internal validation.

c. Other clinical supportive data (when a. and b. are not applicable):
N/A

4. Clinical cut-off:
N/A

5. Expected values/Reference range:
Testing was performed in accordance with CLSI/NCCLS C28-A2, How to Define and Determine Reference Intervals in the Clinical Laboratory, Approved Guideline-Second Edition. A normal range study was conducted to assess the Reference Ranges for the LH 780 System. Whole blood samples were collected from 126 donors (males and females) from the Beckman Coulter Inc. blood donor program. The selection of donors was consistent with guidelines stated in CLSI/NCCLS C28-A2. Reference intervals for each parameter were calculated using 95% confidence limits. Acceptance criteria were listed in the Performance Characteristics section of the Draft On-Line Help CD Rom, Section 13. Acceptance criteria were met.

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N. Instrument Name:

COULTER® LH 780 Hematology Analyzer

O. System Descriptions:

1. Modes of Operation:

Open Tube and closed Tube

2. Software:

FDA has reviewed applicant’s Hazard Analysis and software development processes for this line of product types:

Yes ☐ X or No ☐

3. Specimen Identification:

Barcode

4. Specimen Sampling and Handling:

Open Tube, pierced cap

5. Calibration:

COULTER® S-Cal commercial calibrators

6. Quality Control:

Daily Instruments Check, Commercial Controls, Delta Checks, Patient Controls, XM Analysis, & IQAP

P. Other Supportive Instrument Performance Characteristics Data Not Covered In The "Performance Characteristics" Section above:

In order to demonstrate substantial equivalence of the LH 780 Hematology Analyzer to the LH 750 hematology analyzer, the LH 750 Body fluids Application and Sysmex XE-2100 Hematology Analyzer (for RDW-SD) experiments were designed and executed based on accepted industry standards and internal product development procedures. The performance protocols for data collection adhere to CLSI/NCCLS documents, ICSH/ISLH recommended reference methods, FDA guidance documents, and scientifically valid procedures.

Data was collected internally using normal and clinical samples at the Beckman Coulter, Inc. Systems and Applications Support Laboratory in Miami, Florida. Normal whole blood

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specimens were obtained from the in-house blood center using a screened pool of donors. Clinical samples were obtained by arrangement with local hospitals, using spent specimens from routine laboratory analyses. For external site testing, clinical samples were obtained by using spent specimens from routine laboratory analysis.

Q. Proposed Labeling:

The labeling is sufficient and it satisfies the requirements of 21 CFR Part 809.10.

R. Conclusion:

The submitted information in this premarket notification is complete and supports a substantial equivalence decision.

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