BC-3600 Auto Hematology Analyzer

K143348 · Mindray Bio-Medical Electronics Co., Ltd. · GKZ · Aug 21, 2015 · Hematology

Device Facts

• Record ID: K143348
• Device Name: BC-3600 Auto Hematology Analyzer
• Applicant: Mindray Bio-Medical Electronics Co., Ltd.
• Product Code: GKZ · Hematology
• Decision Date: Aug 21, 2015
• Decision: SESE
• Submission Type: Traditional
• Regulation: 21 CFR 864.5220
• Device Class: Class 2
• Attributes: Pediatric

Indications for Use

The BC-3600 auto hematology analyzer is a quantitative, automated hematology analyzer for in vitro diagnostic use in clinical laboratories. The BC-3600 auto hematology analyzer provide complete blood count (WBC, RBC, HGB, HCT, MCV, MCH, MCHC, RDW, PLT, MPV) and leukocyte 3-Part differential (Lymph#, Mid#, Gran#, Lymph%, Mid%, Gran%) for whole blood specimens, collected in a salt of EDTA [dipotassium (K₂) or tripotassium (K₃)] obtained by venipuncture or fingerstick. The purpose of the BC-3600 Auto Hematology Analyzer is to identify the normal human patient, with normal system-generated parameters, from patients whose results require additional studies.

Device Story

The BC-3600 is an automated hematology analyzer for clinical laboratories; operated by trained professionals. It processes anticoagulated venous or capillary whole blood samples (K2EDTA/K3EDTA) via closed-vial or predilute modes. The device uses the impedance method (Coulter principle) to count and size WBC, RBC, and PLT; colorimetric method for HGB. Hydrodynamic focusing ensures precise cell passage through apertures; electronic pulse intensity correlates to cell volume. The system generates 16 parameters and three histograms. Output is displayed on a TFT touch screen, printed, or transmitted to LIS/HIS. Results assist clinicians in identifying normal patients versus those requiring additional diagnostic studies.

Clinical Evidence

Bench testing only. Method comparison study (n=1222) against BC-3200 showed high correlation (r=0.865–0.999). Clinical sensitivity (73.6%) and specificity (76.5%) evaluated against manual microscopy (n=1208). Precision/reproducibility studies (n=240 per control level) showed acceptable CV%. Linearity, carryover, and interference studies met predefined specifications. Reference intervals established for adults (n=255) and verified for pediatric populations via literature.

Technological Characteristics

Impedance-based cell counting; colorimetric HGB measurement. 800x600 TFT color touch screen. Connectivity: LAN, RS-232, 4 USB ports. Throughput: 60 samples/hour. Reagents: M-30D Diluent, M-30CFL Lyse, M-30R Rinse. Sample volume: 21 μL (whole blood mode). Software manages sample processing, data acquisition, and LIS/HIS transmission.

Indications for Use

Indicated for use in clinical laboratories by trained medical professionals to perform complete blood counts and 3-part leukocyte differentials on whole blood (K2EDTA or K3EDTA) from adult and pediatric patients. Used to identify normal patients and flag results requiring further study.

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

• BC-3200 Hematology Analyzer (K093394)

Submission Summary (Full Text)

{0}

1

# 510(k) SUBSTANTIAL EQUIVALENCE DETERMINATION DECISION SUMMARY

A. 510(k) Number:
K143348

B. Purpose for Submission:
Clearance of new device

C. Manufacturer and Instrument Name:
Shenzhen Mindray Bio-Medical Electronics Co. LTD, BC-3600 Auto Hematology Analyzer

D. Type of Test or Tests Performed:
Complete blood count (WBC, RBC, HGB, HCT, MCV, MCH, MCHC, RDW, PLT, MPV) and leukocyte 3-part differential (Lymph#, Mid#, Gran#, Lymph%, Mid%, Gran%)

E. System Descriptions:

1. Device Description:
The BC-3600 Auto Hematology Analyzer is a quantitative, automated hematology analyzer and leukocyte differential counter for in vitro diagnostic use in clinical laboratories. It is only to be used by trained medical professionals to identify the normal patient, with all normal system-generated parameters, and to flag or identify patient results that require additional studies. The analyzer provides analysis results for 16 parameters of human blood and three histograms.

The BC-3600 Auto Hematology Analyzer system consists of: the BC-3600 Auto Hematology Analyzer, M-30D Diluent, M-30CFL Lyse, M-30R Rinse, Probe Cleanser, BC-3D Controls (low, normal and high), and SC-CAL PLUS Calibrator.

2. Principles of Operation:
The BC-3600 Auto Hematology Analyzer (hereafter referred to as BC-3600) uses the impedance method to count and measure the size of WBC, RBC and PLT in human whole blood. The WBC, RBC and PLT are counted in a dedicated channel using the measurement of changes in electrical resistance. These blood cells are suspended in a conductive diluent and hydrodynamic technology is used to ensure the cells pass through an aperture of known dimensions. The intensity of the electronic pulse from the cells passing through the aperture is proportional to the cell volume. HGB is determined by the colorimetric method. In addition, the analyzer uses a volumetric metering unit to control the count cycle and to ensure that a precise volume of sample is analyzed for the measurement.

{1}

WBC (10³/μL) is the number of leukocytes measured directly by counting the white blood cells passing through the aperture. The analyzer presents a WBC histogram, whose x-coordinate represents the cell volume (fL), and y-coordinate represents the number of cells. With the help of the diluent and lyse, this analyzer can size the white blood cells into three subpopulations: lymphocytes, mid-sized cells (including monocytes, basophils and eosinophils) and granulocytes (neutrophils). Based on the WBC histogram, the analyzer calculates the Lymph %, Mid %, and Gran % and expresses the results in percentage.

RBC (10⁶/μL) is the number of erythrocytes measured directly by counting the erythrocytes passing through the aperture. The analyzer also presents a RBC histogram, where the x-coordinate represents the cell volume (fL) and y-coordinate represents the number of cells. Based on the RBC histogram, the analyzer calculates the mean cell volume (MCV) and expresses the result in fL. In addition, the analyzer calculates the Coefficient of Variation of the erythrocyte distribution width (RDW).

HGB is determined by the colorimetric method and expressed in g/dL. In addition, the analyzer uses a volumetric metering unit to control the count cycle and to ensure that a precise volume of sample is analyzed for the measurement.

PLT (10³/μL) is measured directly by counting the platelets passing through the aperture.

3. Modes of Operation:
The BC-3600 operates in closed-vial whole blood or predilute analysis modes.

Does the applicant’s device contain the ability to transmit data to a computer, webserver, or mobile device?
Yes ☐ X ☐ or No ☐

Does the applicant’s device transmit data to a computer, webserver, or mobile device using wireless transmission?
Yes ☐ or No ☐ X ☐

4. Specimen Identification:
Specimen identification input is manual (by operator) or by barcode reader (optional).

5. Specimen Sampling and Handling:
Samples are manually mixed and loaded into a sample compartment one at a time. The BC-3600 processes anticoagulated venous and capillary whole blood collected in K₂EDTA or K₃EDTA collection containers. The BC-3600 has two testing modes, whole blood analysis mode and predilute analysis mode.

2

{2}

6. Calibration:
Calibration and verification of calibration with the use of SC-CAL PLUS calibrator is performed by automated or manual method according to the instructions for use, laboratory procedures, and local or national regulations.

7. Quality Control:
Quality control performance is to be evaluated using BC-3D controls (low, normal, high) at intervals established by laboratory procedures and local or national regulations.

8. Software:
The software is purposed to operate the system featuring sample management, sample processing, data acquisition, data processing, result management, patient data management, and instrument management.

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

Yes ☐ X ☐ or No ☐

F. Regulatory Information:

1. Regulation section:
21 CFR § 864.5220, Automated differential cell counter

2. Classification:
Class II

3. Product code:
GKZ – Counter, Differential Cell

4. Panel:
Hematology (81)

G. Intended Use:

1. Indication(s) for Use:
The BC-3600 auto hematology analyzer is a quantitative, automated hematology analyzer for in vitro diagnostic use in clinical laboratories. The BC-3600 auto hematology analyzer provide complete blood count (WBC, RBC, HGB, HCT, MCV, MCH, MCHC, RDW, PLT, MPV) and leukocyte 3-Part differential (Lymph#, Mid#, Gran#, Lymph%, Mid%, Gran%) for whole blood specimens, collected in a salt of EDTA [dipotassium (K₂) or tripotassium (K₃)] obtained by venipuncture or fingerstick. The purpose of the BC-3600 Auto Hematology Analyzer is to identify the normal human patient, with normal system-generated parameters, from patients whose results require additional studies.

3

{3}

2. Special Conditions for Use Statement(s): For prescription use only.

H. Substantial Equivalence Information:

1. Predicate Device Name(s) and 510(k) numbers: BC-3200 Hematology Analyzer (K093394)
2. Comparison with Predicate Device:

| Similarities | | |
| --- | --- | --- |
| Item | Device | Predicate |
| Intended Use | The BC-3600 Auto Hematology Analyzer is a quantitative, automated hematology analyzer for in vitro diagnostic use in clinical laboratories. The BC-3600 Auto Hematology Analyzer provides complete blood count (WBC, RBC, HGB, HCT, MCV, MCH, MCHC, RDW, PLT, MPV) and leukocyte 3-part differential (Lymph#, Mid#, Gran#, Lymph%, Mid%, Gran%) for whole blood specimens, collected in a salt of EDTA [dipotassium (K2) or tripotassium (K3)] obtained by venipuncture or fingerstick. The purpose of the BC-3600 Auto Hematology Analyzer is to identify the normal human patient, with normal system-generated parameters, from patients whose results require additional studies. | The BC-3200 auto hematology analyzer is a quantitative, automated hematology analyzer and leukocyte differential counter to be used in clinical laboratories for In Vitro Diagnostic purpose. The intended use of BC-3200 Auto Hematology Analyzer is to identify the normal patient, with all normal system-generated parameters, and to flag or identify patient results that require additional studies. |
| Test Principle | WBC, RBC, MCV, RDW, PLT and MPV: Coulter Principle of Impedance
HGB: colorimetric method
WBC Differential: instrument calculation of a three-population leukocyte count (Lymph%, Mid%, Gran%) taken from the WBC histogram based on cell size determined by impedance method. The absolute number for each population is then calculated. | Same |
| Mode of Operation | Manual presentation of closed-vial for whole blood or predilute analysis modes. | Same |
| Sample Processing | Utilizes an automatic sampling, diluting and mixing device for sample processing. | Same |
| Sample Identification | Manual barcode scan of sample tube identifier or manual keyboard entry of sample identifier. | Same |
| System | 60 samples per hour | Same |

{4}

| Similarities | | |
| --- | --- | --- |
| Item | Device | Predicate |
| Throughput | | |
| Data Analysis | Analyze analog raw data to generate reported parameters | Same |
| Data Reporting | Display, printing and transmission of data to LIS/HIS. | Same |
| Quality Control | BC-3D Controls (low, normal and high) | Same |
| Calibrator | SC-CAL PLUS Calibrator | Same |
| Analysis Reagents | M-30D Diluent
M-30CFL Lyse
M-30R Rinse | Same |
| Differences | | |
| --- | --- | --- |
| Item | Device | Predicate |
| Sample Type | Anticoagulated (K2EDTA or K3EDTA) venous and capillary whole blood | Anticoagulated (K2EDTA) whole blood |
| Cleaning Agents | Probe Cleanser | M-30P Probe Cleanser
M-30E E-Z Cleanser |
| Sample Aspiration Volume | Whole blood analysis mode: 21 μL of whole blood
Predilute analysis mode: 20 μL of blood to prepare a diluted sample | Whole blood analysis mode: 13 μL of whole blood
Predilute analysis mode: 20 μL of blood to prepare a diluted sample |
| Display | TFT Color Touch Screen, 800×600 pixels | Color LCD, 10.4-inch, 800x600 pixels |
| I/O Interfaces | One LAN interface, built-in network card, TCP/IP compatible
One RS-232 port to support the host connected to LIS with serial port
4 USB ports | One keyboard interface
Two RS-232 interfaces
One parallel port
One power supply for the floppy disk drive |

# I. Special Control/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

CLSI H26-A2, Validation, Verification, and Quality Assurance of Automated Hematology Analyzers; Proposed Standard - Second Edition

CLSI EP06-A, Evaluation of the Linearity of Quantitative Measurement Procedures: A Statistical Approach; Approved Guideline

CLSI H20-A2, Reference Leukocyte (WBC) Differential Count (Proportional) and

{5}

Evaluation of Instrumental Methods; Approved Standard - Second Edition

CLSI EP09-A3, Measurement Procedure Comparison and Bias Estimation Using Patient Samples; Approved Guideline - Third Edition

CLSI EP17-A, Protocols for Determination of Limits of Detection and Limits of Quantitation; Approved Guideline

CLSI EP05-A2, Evaluation of Precision Performance of Quantitative Measurement Methods; Approved Guideline - Second Edition

CLSI EP28-A3c, Defining, Establishing, and Verifying Reference Intervals in the Clinical Laboratory; Approved Guideline - Third Edition

# J. Performance Characteristics:

# 1. Analytical Performance:

# a. Method Comparison

Method comparison studies were performed within three clinical sites to assess the performance of the BC-3600 analyzer compared to the BC-3200 analyzer utilizing a total of $1222\mathrm{K}_2\mathrm{EDTA}$ venous whole blood samples. The study population included normal and abnormal pediatric and adult subjects.

Statistical analyses for the method comparison, demonstrating correlation between the BC-3600 and the BC-3200 analyzers were provided based on Deming, weighted Deming, and Passing-Bablok regressions for each blood parameter, along with point estimates and $95\%$ confidence intervals at five clinical evaluation points.

Correlation and Estimated Bias of BC-3600 Compared to BC-3200 - Combined Sites

| Parameter | (r) | Slope | 95% CI | | Intercept (95% CI) | 95% CI | | Mean | |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| | | | Lower Limit | Upper Limit | | Lower Limit | Upper Limit | BC-3200 | BC-3600 |
| WBC | 0.999 | 0.990 | 0.988 | 0.992 | 0.1861 | 0.152 | 0.220 | 11.29 | 11.36 |
| Lymph# | 0.985 | 1.0665 | 1.057 | 1.076 | -0.155 | -0.176 | -0.0134 | 2.16 | 2.15 |
| Mid# | 0.879 | 0.921 | 0.895 | 0.947 | 0.0505 | 0.034 | 0.067 | 0.60 | 0.60 |
| Gran# | 0.998 | 1.0674 | 1.064 | 1.071 | -0.2177 | -0.242 | -0.193 | 5.96 | 6.15 |
| Lymph% | 0.982 | 1.098 | 1.088 | 1.108 | -3.2854 | -3.615 | -2.956 | 30.67 | 30.39 |
| Mid% | 0.677 | 0.577 | 0.544 | 0.610 | 3.2976 | 3.031 | 3.564 | 8.28 | 8.07 |
| Gran% | 0.985 | 1.0462 | 1.037 | 1.055 | -1.9542 | -2.524 | -1.385 | 62.48 | 63.41 |
| RBC | 0.997 | 1.0098 | 1.007 | 1.013 | -0.0296 | -0.043 | -0.016 | 4.25 | 4.26 |
| HGB | 0.998 | 1.0055 | 1.003 | 1.008 | -0.1434 | -0.178 | -0.109 | 12.45 | 12.37 |
| HCT | 0.997 | 0.9829 | 0.980 | 0.986 | 0.8568 | 0.732 | 0.982 | 38.03 | 38.23 |
| MCV | 0.994 | 1.0132 | 1.009 | 1.018 | -0.875 | -1.27 | -0.48 | 90.46 | 90.77 |
| MCH | 0.991 | 1.0087 | 1.003 | 1.014 | -0.4767 | -0.641 | -0.312 | 29.58 | 29.36 |

{6}

Correlation and Estimated Bias of BC-3600 Compared to BC-3200 - Combined Sites

| Parameter | (r) | Slope | 95% CI | | Intercept | 95% CI | | Mean | |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| | | | Lower Limit | Upper Limit | | Lower Limit | Upper Limit | BC-3200 | BC-3600 |
| MCHC | 0.915 | 0.943 | 0.926 | 0.959 | 1.4625 | 0.922 | 2.003 | 32.69 | 32.28 |
| RDW | 0.939 | 1.104 | 1.088 | 1.120 | -1.4722 | -1.709 | -1.235 | 14.55 | 14.59 |
| PLT | 0.992 | 0.9847 | 0.979 | 0.990 | 7.0335 | 5.453 | 8.614 | 260.56 | 263.61 |
| MPV | 0.865 | 0.793 | 0.773 | 0.813 | 1.6200 | 1.452 | 1.788 | 8.48 | 8.34 |

Clinical sensitivity and specificity studies were conducted to evaluate the flagging capabilities of the BC-3600 analyzer in comparison to manual light microscopy using a total of 1208 patient samples representing a number of abnormal conditions.

| Total | Manual | | Value | | |
| --- | --- | --- | --- | --- | --- |
| | | | | Efficiency | 75.9% |
| BC-3600 | P | N | Total | FP% | 23.5% |
| P | 178 | 227 | 405 | FN% | 26.4% |
| N | 64 | 739 | 803 | Sensitivity | 73.6% |
| Total | 242 | 966 | 1208 | Specificity | 76.5% |

# c. Precision/Reproducibility

Precision performance of the BC-3600 was evaluated by performing repeatability and reproducibility studies across three clinical laboratory sites.

The repeatability study was conducted with normal and abnormal venous whole blood samples collected in $\mathrm{K}_2\mathrm{EDTA}$ collection containers. The samples were selected to span the lower, normal and upper limits of the analytical measuring range. Each sample was analyzed 10 consecutive times in the whole blood and predilute analysis modes.

Reproducibility performance was conducted over 20 operating days utilizing three levels of commercial control material (BC-3D low, normal, and high) performing two runs per day and two replicates per run, yielding a total of 80 replicates per control level. To further demonstrate precision performance, SD and CV% of within-run, between-run, between-day, and within-device were calculated per site and for the combined sites as shown below.

BC-3D Low Level Control $(N = 240)$

| Parameter | Mean | Within-run | | Between-run | | Between-day | | Between-device | | Total | |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| | | SD | CV% | SD | CV% | SD | CV% | SD | CV% | SD | CV% |
| WBC | 1.94 | 0.06 | 3.16 | 0.00 | 0.00 | 0.05 | 2.68 | 0.12 | 6.24 | 0.15 | 7.49 |
| Lymph# | 1.11 | 0.05 | 4.71 | 0.00 | 0.00 | 0.04 | 3.65 | 0.09 | 7.81 | 0.11 | 9.82 |
| Mid# | 0.19 | 0.04 | 20.35 | 0.00 | 0.00 | 0.01 | 4.90 | 0.00 | 0.00 | 0.04 | 20.93 |

{7}

BC-3D Normal Level Control (N=240)

| Parameter | Mean | Within-run | | Between-run | | Between-day | | Between-device | | Total | |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| | | SD | CV% | SD | CV% | SD | CV% | SD | CV% | SD | CV% |
| WBC | 7.81 | 0.11 | 1.43 | 0.03 | 0.35 | 0.11 | 1.44 | 0.17 | 2.20 | 0.23 | 3.01 |
| Lymph# | 2.38 | 0.07 | 2.91 | 0.02 | 0.67 | 0.07 | 2.81 | 0.09 | 3.89 | 0.13 | 5.66 |
| Mid# | 0.51 | 0.03 | 6.57 | 0.01 | 2.53 | 0.00 | 0.00 | 0.01 | 1.14 | 0.04 | 7.13 |
| Gran# | 4.92 | 0.09 | 1.82 | 0.01 | 0.23 | 0.04 | 0.80 | 0.09 | 1.79 | 0.13 | 2.69 |
| Lymph% | 30.43 | 0.60 | 1.98 | 0.00 | 0.00 | 0.43 | 1.41 | 0.57 | 1.86 | 0.93 | 3.06 |
| Mid% | 6.77 | 0.29 | 4.24 | 0.00 | 0.00 | 0.09 | 1.29 | 0.24 | 3.52 | 0.38 | 5.66 |
| Gran% | 62.80 | 0.59 | 0.94 | 0.08 | 0.12 | 0.46 | 0.73 | 0.33 | 0.52 | 0.82 | 1.30 |
| RBC | 4.72 | 0.03 | 0.72 | 0.02 | 0.42 | 0.02 | 0.52 | 0.12 | 2.58 | 0.13 | 2.76 |
| HGB | 13.76 | 0.08 | 0.56 | 0.07 | 0.48 | 0.07 | 0.49 | 0.45 | 3.30 | 0.47 | 3.42 |
| HCT | 40.82 | 0.31 | 0.76 | 0.17 | 0.41 | 0.22 | 0.53 | 0.74 | 1.82 | 0.85 | 2.08 |
| MCV | 86.43 | 0.15 | 0.18 | 0.24 | 0.27 | 0.42 | 0.49 | 0.64 | 0.74 | 0.82 | 0.94 |
| MCH | 29.12 | 0.19 | 0.64 | 0.15 | 0.50 | 0.09 | 0.32 | 0.21 | 0.74 | 0.33 | 1.15 |
| MCHC | 33.70 | 0.23 | 0.69 | 0.11 | 0.32 | 0.09 | 0.28 | 0.50 | 1.47 | 0.57 | 1.68 |
| RDW | 14.26 | 0.10 | 0.68 | 0.08 | 0.55 | 0.12 | 0.84 | 0.59 | 4.16 | 0.62 | 4.33 |
| PLT | 257.09 | 6.85 | 2.66 | 0.25 | 0.10 | 1.91 | 0.74 | 4.35 | 1.69 | 8.34 | 3.24 |
| MPV | 7.81 | 0.10 | 1.27 | 0.03 | 0.41 | 0.05 | 0.68 | 0.27 | 3.49 | 0.30 | 3.80 |

BC-3D High Level Control $(N = 240)$

| Parameter | Mean | Within-run | | Between-run | | Between-day | | Between-device | | Total | |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| | | SD | CV% | SD | CV% | SD | CV% | SD | CV% | SD | CV% |
| WBC | 20.81 | 0.20 | 0.95 | 0.03 | 0.16 | 0.16 | 0.77 | 0.37 | 1.79 | 0.45 | 2.17 |
| Lymph# | 2.92 | 0.07 | 2.56 | 0.00 | 0.00 | 0.06 | 2.08 | 0.08 | 2.91 | 0.13 | 4.40 |
| Mid# | 0.93 | 0.05 | 5.56 | 0.00 | 0.00 | 0.02 | 1.67 | 0.03 | 3.63 | 0.06 | 6.85 |
| Gran# | 16.97 | 0.18 | 1.09 | 0.00 | 0.00 | 0.12 | 0.68 | 0.42 | 2.50 | 0.48 | 2.81 |
| Lymph% | 14.02 | 0.29 | 2.09 | 0.05 | 0.32 | 0.23 | 1.63 | 0.66 | 4.70 | 0.76 | 5.41 |
| Mid% | 4.51 | 0.19 | 4.24 | 0.00 | 0.00 | 0.07 | 1.49 | 0.08 | 1.87 | 0.22 | 4.87 |

{8}

| Parameter | Mean | Within-run | | Between-run | | Between-day | | Between-device | | Total | |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| | | SD | CV% | SD | CV% | SD | CV% | SD | CV% | SD | CV% |
| Gran% | 81.47 | 0.36 | 0.44 | 0.00 | 0.00 | 0.21 | 0.25 | 0.60 | 0.74 | 0.73 | 0.90 |
| RBC | 5.81 | 0.04 | 0.74 | 0.03 | 0.51 | 0.02 | 0.42 | 0.21 | 3.56 | 0.21 | 3.70 |
| HGB | 18.85 | 0.07 | 0.39 | 0.06 | 0.30 | 0.10 | 0.51 | 0.66 | 3.49 | 0.67 | 3.56 |
| HCT | 54.59 | 0.40 | 0.73 | 0.29 | 0.54 | 0.22 | 0.39 | 1.86 | 3.40 | 1.93 | 3.54 |
| MCV | 94.02 | 0.16 | 0.17 | 0.24 | 0.25 | 0.56 | 0.60 | 0.28 | 0.30 | 0.69 | 0.74 |
| MCH | 32.47 | 0.22 | 0.69 | 0.15 | 0.45 | 0.09 | 0.28 | 0.15 | 0.46 | 0.32 | 0.98 |
| MCHC | 34.53 | 0.23 | 0.66 | 0.13 | 0.38 | 0.13 | 0.37 | 0.05 | 0.13 | 0.30 | 0.86 |
| RDW | 13.47 | 0.08 | 0.63 | 0.06 | 0.43 | 0.13 | 0.93 | 0.78 | 5.78 | 0.80 | 5.90 |
| PLT | 526.38 | 10.66 | 2.03 | 4.19 | 0.80 | 3.09 | 0.59 | 17.78 | 3.38 | 21.38 | 4.06 |
| MPV | 7.96 | 0.07 | 0.93 | 0.01 | 0.11 | 0.04 | 0.50 | 0.30 | 3.82 | 0.32 | 3.96 |

# c. Linearity

Linearity of the WBC, PLT, RBC, and HGB parameters was evaluated on three instruments at one clinical laboratory site. WBC and PLT linearity samples were derived from commercial linearity material diluted to different levels spanning the targeted range. Fresh whole blood diluted to different levels was utilized for RBC and HGB linear range studies. Relative concentrations of each dilution were obtained using the density-weight method.

| Parameter | Linearity Range |
| --- | --- |
| WBC | 0.3–99.9×103/μL |
| RBC | 0.20–7.99×106/μL |
| HGB | 1.0–24.9 g/dL |
| PLT | 10–999×103/μL |

# d. Carryover

Carryover was determined for the following parameters: WBC, RBC, HGB and PLT. Testing was performed to test the different analytical cycle combinations of within-mode for whole blood, within-mode for predilute and mode-to-mode.

For whole blood and predilute sampling, within-mode and mode-to-mode sampling carryover were tested. To assess within-mode carryover of the whole blood and predilute modes, three high concentration (H1, H2, and H3) samples were consecutively analyzed followed by three low concentration (L1, L2, and L3) samples.

To assess whole blood to predilute mode carryover three whole blood high concentration samples were analyzed followed by three consecutive runs of low concentration pre-diluted samples. To assess predilute to whole blood mode carryover, three high concentration prediluted samples were analyzed followed by three

{9}

consecutive runs of low concentration whole blood samples.

Carryover % was determined using the following calculation: % Carryover = (LTV1-LTV3) / (HTV3-LTV3) × 100. The results of the carryover study were within the predefined specifications of ≤ 0.5% for WBC, RBC, HGB, and ≤ 1.0% for PLT.

e. Interfering Substances

A study was conducted to determine the interference level of bilirubin and intralipid with the hematology results of the BC-3600 analyzer. Ten whole blood samples were collected for each interference study and contrived with commercially derived bilirubin or intralipid. Each sample was contrived to yield five interferent concentrations and analyzed in the whole blood analysis mode.

There was no significant bilirubin interference up to a concentration of 500 mg/L for the WBC, Lymph#, Mid#, Gran#, Lymph%, Mid%, Gran%, RBC, HCT, MCV, MCH, MCHC, RDW, PLT and MPV parameters; and no significant bilirubin interference up to a concentration of 40 mg/L for the HGB parameter.

There was no significant intralipid interference up to a concentration of 11.7 g/L for the following parameter: WBC, Lymph#, Mid#, Gran#, Lymph%, Mid%, Gran%, RBC, HCT, MCV, RDW, PLT and MPV.

2. Other Supportive Instrument Performance Data Not Covered Above:

a. Sample Stability

To determine sample stability, 35 whole blood specimens collected in K₂EDTA were analyzed in the whole blood analysis mode, and 25 whole blood specimens collected in K₂EDTA were analyzed in the predilute analysis mode. Aliquots were prepared and stored at the defined condition for each specimen, then analyzed in duplicate at different time points according to the study design. When samples were stored for the durations defined at controlled room temperature [64–79° F (18–26° C)] or at refrigerated temperature [35.6–46.4° F (2–8° C)] the analyzer performance met the defined acceptance criteria. Predilute whole blood sample stability is 30 minutes when stored at 18–26°C after preparation for all parameters. Whole blood sample stability of all parameters is listed in the following table.

| Parameter | Whole blood stability at 18–26°C (hours) | Whole blood stability in at 2–8°C (hours) |
| --- | --- | --- |
| WBC | 12 | 24 |
| Lymph# | 8 | 24 |
| Mid# | 8 | 24 |
| Gran# | 8 | 24 |

{10}

| Parameter | Whole blood stability at 18–26°C (hours) | Whole blood stability in at 2–8°C (hours) |
| --- | --- | --- |
| Lymph% | 8 | 24 |
| Mid% | 8 | 24 |
| Gran% | 8 | 24 |
| RBC | 12 | 24 |
| HGB | 12 | 24 |
| HCT | 12 | 24 |
| MCV | 12 | 24 |
| MCH | 12 | 24 |
| MCHC | 12 | 24 |
| RDW | 12 | 24 |
| PLT | 12 | 24 |
| MPV | 12 | 24 |

# b. Whole Blood vs. Predilute Analysis Mode Comparison

To demonstrate equivalence between the whole blood and predilute analysis modes, 61 paired whole blood samples (collected in $\mathrm{K}_2\mathrm{EDTA}$ ), representing normal and abnormal medical conditions were and analyzed in each mode. Results were provided based on Deming, weighted Deming, or Passing-Bablok regressions along with point estimates and $95\%$ confidence intervals at five clinical evaluation points. Results were within the defined acceptance criteria.

| Parameter | (r) | Slope | 95% CI | | Intercept (95% CI) | 95% CI | | Mean | |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| | | | Lower Limit | Upper Limit | | Lower Limit | Upper Limit | BC-3200 | BC-3600 |
| WBC | 1.000 | 0.982 | 0.969 | 0.996 | 0.05 | -0.04 | 0.14 | 12.55 | 12.4 |
| Lymph# | 0.999 | 1.094 | 1.024 | 1.163 | -0.11 | -0.22 | 0.01 | 3.45 | 3.55 |
| Mid# | 0.965 | 1.000 | 0.857 | 1.000 | -0.10 | -0.10 | 0.01 | 0.92 | 0.95 |
| Gran# | 1.000 | 0.991 | 0.953 | 1.029 | 0.00 | -0.16 | 0.17 | 7.96 | 7.91 |
| Lymph% | 0.996 | 1.043 | 1.014 | 1.072 | -0.02 | -0.74 | 0.69 | 27.41 | 28.56 |
| Mid% | 0.737 | 0.765 | 0.615 | 0.980 | 1.08 | -0.54 | 2.12 | 8.51 | 7.48 |
| Gran% | 0.988 | 0.994 | 0.967 | 1.022 | 0.38 | -1.57 | 2.34 | 64.82 | 63.97 |
| RBC | 0.996 | 0.983 | 0.973 | 0.993 | 0.011 | -0.20 | 0.041 | 4.23 | 4.18 |
| HGB | 0.997 | 0.985 | 0.976 | 0.994 | 0.08 | 0.01 | 0.15 | 12.33 | 12.23 |
| HCT | 0.996 | 0.980 | 0.961 | 0.998 | -0.26 | -0.99 | 0.48 | 38.46 | 37.42 |
| MCV | 0.997 | 1.021 | 1.002 | 1.039 | -3.06 | -4.71 | 1.40 | 92.02 | 90.86 |
| MCH | 0.997 | 0.996 | 0.979 | 1.013 | 0.28 | -0.23 | 0.80 | 29.47 | 29.64 |
| MCHC | 0.931 | 0.882 | 0.819 | 0.945 | 4.37 | 2.36 | 6.39 | 31.93 | 32.54 |
| RDW | 0.992 | 1.021 | 0.982 | 1.060 | -0.35 | -0.91 | 0.22 | 14.72 | 14.68 |
| PLT | 0.997 | 0.974 | 0.915 | 1.033 | 1.3 | -7.6 | 10.3 | 230.02 | 223.41 |
| MPV | 0.943 | 0.968 | 0.838 | 1.097 | 0.42 | -0.61 | 1.45 | 8.58 | 8.73 |

{11}

c. Anticoagulant Comparison (K2EDTA vs. K3EDTA)

A total of 60 paired fresh whole blood samples collected in K2EDTA and K3EDTA anticoagulant tubes were analyzed on the BC-3600 analyzer in the whole blood analysis mode at one site. The samples were selected to cover the analytical measuring range and medical decision levels for each parameter. The results were analyzed according to CLSI EP09-A3 and were within the defined acceptance criteria.

d. Sample Matrix Comparison (venous vs. fingerstick)

A total of 52 paired whole blood specimens were collected from each subject by capillary method in a K2EDTA microtainer and by venipuncture method in a K2EDTA collection tube, and analyzed in the BC-3600 whole blood analysis mode. Specimens were selected to cover the analytical measuring range and medical decision levels for each parameter. The results were analyzed according to CLSI EP09-A3 and were within the defined acceptance criteria.

e. Determination of limit of blank, lower limits of detection and quantitation

Limit of Blank (LoB) was determined using five blank samples containing the predilute solution (diluent).

To determine the Limit of Detection (LoD) and Limit of Quantitation (LoQ), five low level samples were derived by adding whole blood to diluent. Five replicate measurements of the low level samples were performed in the whole blood analysis mode to verify precision at the lower end of the analytical measuring range.

| Parameter | LoB | LoD | LoQ |
| --- | --- | --- | --- |
| WBC | 0 x 103/μL | 0.05 x103/μL | 0.05 x103/μL |
| PLT | 2.1 x 103/μL | 3.4 x 103/μL | 3.4 x 103/μL |

f. Background Counts

Background count specifications were verified by analyzing M-30D Diluent in the whole blood and predilute analysis modes. The results demonstrated that the background counts were within the predefined acceptance criteria.

| Parameter | Background Specifications |
| --- | --- |
| WBC | ≤0.3 x 103/μL |
| RBC | ≤0.03 x 106/μL |
| HGB | ≤0.1 g/dL |
| PLT | ≤5 x 103/μL |

{12}

# g. Reference Intervals

Adult reference intervals were assessed utilizing whole blood samples collected from 255 normal subjects between the ages of 19-85 (124 male and 131 female), representative of the United States population. The non-parametric method was utilized to calculate the lower and upper limits of the reference ranges. Confidence intervals for the reference limits were calculated using a $90\%$ probability $(90\% \mathrm{CI})$ .

| Parameter | Male (N=124) | | Female (N=131) | | Overall (N=256) | |
| --- | --- | --- | --- | --- | --- | --- |
| | Lower Limit | Upper Limit | Lower Limit | Upper Limit | Lower Limit | Upper Limit |
| WBC (x103/μL) | 4.11 | 12.29 | 4.23 | 13.21 | 4.20 | 12.36 |
| Lymph# (x103/μL) | 1.00 | 3.70 | 0.89 | 5.14 | 1.00 | 4.16 |
| Mid# (x103/μL) | 0.40 | 1.48 | 0.23 | 1.10 | 0.30 | 1.20 |
| Gran# (x103/μL) | 2.10 | 8.65 | 2.03 | 7.61 | 2.10 | 8.26 |
| Lymph% | 14.83 | 45.40 | 15.72 | 50.75 | 14.88 | 47.56 |
| Mid% | 4.84 | 16.20 | 4.43 | 13.93 | 4.54 | 14.56 |
| Gran% | 43.55 | 77.09 | 40.36 | 78.18 | 42.20 | 77.06 |
| RBC (x106/μL) | 3.578 | 5.856 | 3.528 | 5.704 | 3.558 | 5.794 |
| HGB (g/dL) | 10.58 | 17.36 | 10.43 | 16.04 | 10.50 | 16.90 |
| HCT (%) | 33.71 | 50.90 | 33.60 | 47.42 | 33.60 | 50.32 |
| MCV (fL) | 77.03 | 100.94 | 71.28 | 99.91 | 75.66 | 100.10 |
| MCH (pg) | 24.69 | 33.88 | 22.14 | 33.47 | 23.70 | 33.56 |
| MCHC (g/dL) | 31.51 | 34.90 | 31.03 | 34.50 | 31.24 | 34.90 |
| RDW (%) | 11.4 | 15.84 | 11.53 | 15.22 | 11.64 | 15.40 |
| PLT (x103/μL) | 144.6 | 368.8 | 159.0 | 456.6 | 157.2 | 435.8 |
| MPV (fL) | 6.71 | 9.60 | 6.90 | 10.01 | 6.84 | 9.80 |

A literature verification study was performed for the pediatric population. A total of 169 samples were collected from apparently healthy pediatric patients ranging from neonate to 21 years old within each pediatric subcategory (see table below). The results of the WBC, Lymph#, Gran#, RBC, HGB, HCT, MCV, and PLT parameters were compared to literature pediatric reference intervals from Mayo $^{1}$ and IOWA $^{2,3,4}$ .

| Pediatric Category | Age Range |
| --- | --- |
| Neonate | Birth to 28 days |
| Infant | 29 days to < 2 years old |
| Child | 2 to < 12 years old |
| Adolescent | 12 to < 18 years old |
| Transitional adolescent | 18 to ≤ 21 years old |

{13}

1. Mayo, Mayo Clinic – Mayo Medical Laboratories. Rochester 2014 Interpretive Handbook. 2014 Mayo Foundation for Medical Education and Research (MFMER).
2. Nathan, David G. and Oski, Frank A. *Hematology of Infancy and Childhood*. 1987.
3. Lanzkowsky, Philip. *Pediatric Hematology-Oncology: a Treatise for the Clinician*. New York: McGraw-Hill, 1980.
4. Miller, Denis R., et al. *Blood diseases of Infancy and Childhood*. St. Louis: Mosby, 1984.

**K. Proposed Labeling:**

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

**L. Conclusion:**

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

14