ABL90 FLEX PLUS System
Device Facts
| Record ID | K240998 |
|---|---|
| Device Name | ABL90 FLEX PLUS System |
| Applicant | Radiometer Medicals Aps |
| Product Code | CHL · Clinical Chemistry |
| Decision Date | Dec 13, 2024 |
| Decision | SESE |
| Submission Type | Traditional |
| Regulation | 21 CFR 862.1120 |
| Device Class | Class 2 |
Intended Use
The ABL90 FLEX PLUS System is an in vitro diagnostic, portable, automated analyzer that quantitatively measures pH, blood gas (pO2), Oximetry (sO2, ctHb, FO2Hb, FCOHb, FMetHb, and FHHb), in heparinized arterial and venous whole blood. The ABL90 FLEX PLUS System is intended for use by trained technologists, nurses, physicians and therapists. It is intended for use in a laboratory environment, near patient, or point-of-care setting. These tests are only performed under a physician's order. pH and pO2: pH and pO2 measurements are used in the diagnosis and treatment of life-threatening acid-base disturbances. sO2: Oxygen saturation, more specifically the ratio between the concentration of oxyhemoglobin and oxyhemoglobin plus reduced hemoglobin. ctHb (Total Hemoglobin): Total hemoglobin measurements are used to measure the hemoglobin content of whole blood for the detection of anemia. FO2Hb: Oxyhemoglobin as a fraction of total hemoglobin. FCOHb: Carboxyhemoglobin measurements are used to determine the carboxyhemoglobin content of human blood as an aid in the diagnosis of carbon monoxide poisoning. FMetHb: Methemoglobin as a fraction of total hemoglobin. FHHb: Reduced hemoglobin as a fraction of total hemoglobin..
Device Story
Portable, automated in vitro diagnostic analyzer; measures pH, pO2, and oximetry parameters in heparinized arterial/venous whole blood. Operates via potentiometry (pH), optical (pO2), and spectrophotometry (oximetry). Used in laboratory or point-of-care settings by trained clinicians. Input: 65 µL whole blood sample via syringe or short probe. Output: Quantitative measurements displayed on touch screen; used by physicians to diagnose acid-base disturbances, anemia, and carbon monoxide poisoning. System includes analyzer, sensor cassettes, and solution packs. Provides rapid diagnostic data to inform clinical decision-making at the point of care.
Clinical Evidence
Bench testing only. Studies conducted per CLSI guidelines: linearity (EP06, EP39), detection limits (EP17-A2, EP39), precision (EP05-A3), method comparison (EP09c), and interference (EP07, EP37). Precision evaluated using QC ampoules and whole blood across multiple sites. Method comparison against predicate (K160153) showed high correlation (R2 > 0.99) for all parameters. Interference testing identified specific substances (e.g., Intralipid, Methylene Blue) causing measurement errors or clinically significant bias.
Technological Characteristics
Potentiometry (pH), optical phosphorescence (pO2), and spectrophotometry (oximetry). Portable form factor. Consumables: Sensor cassette and solution pack. Automated fluid transport system. Barcode reader for specimen ID. Connectivity: Standalone analyzer. Calibration: Automated via solution pack and atmospheric air.
Indications for Use
Indicated for trained technologists, nurses, physicians, and therapists to quantitatively measure pH, pO2, and oximetry parameters (sO2, ctHb, FO2Hb, FCOHb, FMetHb, FHHb) in heparinized arterial and venous whole blood in laboratory or point-of-care settings. Used for diagnosis/treatment of acid-base disturbances, anemia detection, and carbon monoxide poisoning diagnosis.
Regulatory Classification
Identification
A blood gases (PCO2 , PO2 ) and blood pH test system is a device intended to measure certain gases in blood, serum, plasma or pH of blood, serum, and plasma. Measurements of blood gases (PCO2 , PO2 ) and blood pH are used in the diagnosis and treatment of life-threatening acid-base disturbances.
Predicate Devices
- ABL90 FLEX PLUS (K160153)
Related Devices
- K151978 — EDAN i15 Blood Gas and Chemistry Analysis System, EDAN i15 Calibrant Fluid Pack, EDAN i15 Blood Gas and Electrolyte Control, EDAN i15 Hematocrit Control · Edan Instruments, Inc. · Jul 15, 2016
- K080370 — ABL 80 CO-OX SYSTEM · Sendx Medical, Inc. · Jul 31, 2008
- K061730 — OSMETECH OPTI R CRITICAL CARE ANALYZER, MODEL GD7044 · Osmetech, Inc. · Aug 4, 2006
- K013729 — STAT PROFILE PHOX BASIC ANALYZER · Nova Biomedical Corp. · Jan 15, 2002
Submission Summary (Full Text)
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December 13, 2024
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Radiometer Medicals ApS Andrea Swingle Senior Specialist, Regulatory Affairs Aakandevej 21 2700 Broenshoej Denmark
Re: K240998
Trade/Device Name: ABL90 FLEX PLUS System Regulation Number: 21 CFR 862.1120 Regulation Name: Blood Gases (PCO2, PO2) and Blood pH Test System Regulatory Class: Class II Product Code: CHL, GKR, GHS Dated: November 15, 2024 Received: November 15, 2024
Dear Andrea Swingle:
We have reviewed your section 510(k) premarket notification of intent to market the device referenced above and have determined the device is substantially equivalent (for the indications for use stated in the enclosure) to legally marketed predicate devices marketed in interstate commerce prior to May 28, 1976, the enactment date of the Medical Device Amendments, or to devices that have been reclassified in accordance with the provisions of the Federal Food, Drug, and Cosmetic Act (the Act) that do not require approval of a premarket approval application (PMA). You may, therefore, market the device, subject to the general controls provisions of the Act. Although this letter refers to your product as a device, please be aware that some cleared products may instead be combination products. The 510(k) Premarket Notification Database available at https://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfpmn/pmn.cfm identifies combination product submissions. The general controls provisions of the Act include requirements for annual registration, listing of devices, good manufacturing practice, labeling, and prohibitions against misbranding and adulteration. Please note: CDRH does not evaluate information related to contract liability warranties. We remind you, however, that device labeling must be truthful and not misleading.
Additional information about changes that may require a new premarket notification are provided in the FDA guidance documents entitled "Deciding When to Submit a 510(k) for a Change to an Existing Device" (https://www.fda.gov/media/99812/download) and "Deciding When to Submit a 510(k) for a Software Change to an Existing Device" (https://www.fda.gov/media/99785/download).
Your device is also subject to, among other requirements, the Quality System (QS) regulation (21 CFR Part 820), which includes, but is not limited to, 21 CFR 820.30, Design controls; 21 CFR 820.90, Nonconforming
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approvals in the device master record (21 CFR 820.181).
product; and 21 CFR 820.100, Corrective and preventive action. Please note that regardless of whether a change requires premarket review, the QS regulation requires device manufacturers to review and approve changes to device design and production (21 CFR 820.30 and 21 CFR 820.70) and document changes and
Please be advised that FDA's issuance of a substantial equivalence determination does not mean that FDA has made a determination that your device complies with other requirements of the Act or any Federal statutes and regulations administered by other Federal agencies. You must comply with all the Act's requirements, including, but not limited to: registration and listing (21 CFR Part 807); labeling (21 CFR Part 801 and Part 809); medical device reporting of medical device-related adverse events) (21 CFR Part 803) for devices or postmarketing safety reporting (21 CFR Part 4, Subpart B) for combination products (see https://www.fda.gov/combination-products/guidance-regulatory-information/postmarketing-safetyreporting-combination-products); good manufacturing practice requirements as set forth in the quality systems (QS) regulation (21 CFR Part 820) for devices or current good manufacturing practices (21 CFR Part 4, Subpart A) for combination products; and, if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR Parts 1000-1050.
All medical devices, including Class I and unclassified devices and combination product device constituent parts are required to be in compliance with the final Unique Device Identification System rule ("UDI Rule"). The UDI Rule requires, among other things, that a device bear a unique device identifier (UDI) on its label and package (21 CFR 801.20(a)) unless an exception or alternative applies (21 CFR 801.20(b)) and that the dates on the device label be formatted in accordance with 21 CFR 801.18. The UDI Rule (21 CFR 830.300(a) and 830.320(b)) also requires that certain information be submitted to the Global Unique Device Identification Database (GUDID) (21 CFR Part 830 Subpart E). For additional information on these requirements, please see the UDI System webpage at https://www.fda.gov/medical-device-advicecomprehensive-regulatory-assistance/unique-device-identification-system-udi-system.
Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21 CFR 807.97). For questions regarding the reporting of adverse events under the MDR regulation (21 CFR Part 803), please go to https://www.fda.gov/medical-device-safety/medical-device-reportingmdr-how-report-medical-device-problems.
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3
For comprehensive regulatory information about mediation-emitting products, including information about labeling regulations, please see Device Advice (https://www.fda.gov/medicaldevices/device-advice-comprehensive-regulatory-assistance) and CDRH Learn (https://www.fda.gov/training-and-continuing-education/cdrh-learn). Additionally, you may contact the Division of Industry and Consumer Education (DICE) to ask a question about a specific regulatory topic. See the DICE website (https://www.fda.gov/medical-device-advice-comprehensive-regulatoryassistance/contact-us-division-industry-and-consumer-education-dice) for more information or contact DICE by email (DICE@fda.hhs.gov) or phone (1-800-638-2041 or 301-796-7100).
Sincerely,
## Paula V. Caposino -S
Paula Caposino, Ph.D. Deputy Division Director Division of Chemistry and Toxicology Devices OHT7: Office of In Vitro Diagnostics Office of Product Evaluation and Quality Center for Devices and Radiological Health
Enclosure
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### Indications for Use
510(k) Number (if known) K240998
Device Name ABL90 FLEX PLUS System
#### Indications for Use (Describe)
The ABL90 FLEX PLUS System is an in vitro diagnostic, portable, automated analyzer that quantitatively measures pH, blood gas (p02), Oximetry (s02, ctHb, FCOHb, FCOHb, FMetHb, and FHHb), in heparinized arterial and venous whole blood.
The ABL90 FLEX PLUS System is intended for use by trained technologists, nurses, physicians and therapists. It is intended for use in a laboratory environment, near patient, or point-of-care setting. These tests are only performed under a physician's order.
pH and pO2: pH and pO2 measurements are used in the diagnosis and treatment of life-threatening acid-base disturbances.
sO2: Oxygen saturation, more specifically the ratio between the concentration of oxyhemoglobin plus reduced hemoglobin.
ctHb (Total Hemoglobin): Total hemoglobin measure the hemoglobin content of whole blood for the detection of anemia.
FO2Hb: Oxyhemoglobin as a fraction of total hemoglobin.
FCOHb: Carboxyhemoglobin measurements are used to determine the carboxyhemoglobin content of human blood as an aid in the diagnosis of carbon monoxide poisoning.
FMetHb: Methemoglobin as a fraction of total hemoglobin.
FHHb: Reduced hemoglobin as a fraction of total hemoglobin.
Type of Use (Select one or both, as applicable)
X Prescription Use (Part 21 CFR 801 Subpart D)
| Over-The-Counter Use (21 CFR 801 Subpart C)
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# 510(k) Summary - K240998
The information provided in this 510(k) summary are in accordance with 21 CFR 807.92
Submitter Information:
| Company Name: | Radiometer Medical ApS |
|-----------------|---------------------------------------------|
| ER Number: | 3002807968 |
| Address: | Aakandevej 21<br>2700 Broenshoej<br>Denmark |
| Contact Person: | Hsiao-Qing Chow |
| Phone: | +45 31401578 |
Application Correspondent:
| Name: | Andrea Swingle |
|-----------|---------------------------------------|
| Function: | Senior Specialist, Regulatory Affairs |
| Email: | andrea.swingle@radiometeramerica.com |
| Phone: | +1 510 246 2559 |
Date prepared: December 13, 2024
### Device Information
| Device Trade Name: | ABL90 FLEX PLUS System |
|--------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Common Name: | Blood Gas Analyzer |
| Regulations: | - 21 CFR 862.1120, Blood gases (pCO2, pO2) and blood pH test system<br>- 21 CFR 864.5620, Automated hemoglobin system<br>- 21 CFR 864.7425, Carboxyhemoglobin assay |
| Product Codes: | CHL, GKR, GHS |
| Device Class: | Class II |
| Predicate Device | |
| Device Trade Name: | ABL90 FLEX PLUS |
| Common Name: | Blood Gas Analyzer |
| 510(k) | K160153 |
| Regulations: | - 21 CFR 862.1120, Blood gases (pCO2, pO2) and blood pH test system<br>- 21 CFR 864.5620, Automated hemoglobin system<br>- 21 CFR 864.7425, Carboxyhemoglobin assay |
| Product Codes: | CHL, GKR, GHS |
| Device Class: | Class II |
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#### Device Description
The ABL90 FLEX PLUS System consists of the ABL90 FLEX PLUS analyzer, sensor cassette and solution pack consumables, and related accessories for the analyzers. The sensor cassettes, solution packs and related accessories are compatible with both analyzers. Multiple versions of the sensor cassettes are available. The sensor cassette versions vary in the maximum number of tests and availability of sensors for use. The solution pack is available in two versions, differing in the number of activities available.
#### Intended Use
The ABL90 FLEX PLUS System is an in vitro diagnostic, portable, automated analyzer that quantitatively measures pH, blood gas (p02), Oximetry (s02, ctHb, FCOHb, FMetHb, and FHHb), in heparinized arterial and venous whole blood.
The ABL90 FLEX PLUS System is intended for use by trained technologists, nurses, physicians and therapists. It is intended for use in a laboratory environment, near patient, or point-of-care setting.
These tests are only performed under a physician's order.
pH and pO2: pH and pO2 measurements are used in the diagnosis and treatment of lifethreatening acid-base disturbances.
s02: Oxygen saturation, more specifically the ratio between the concentration of oxyhemoglobin and oxyhemoglobin plus reduced hemoglobin.
ctHb (Total Hemoglobin): Total hemoglobin measurements are used to measure the hemoglobin content of whole blood for the detection of anemia.
FO2Hb: Oxyhemoqlobin as a fraction of total hemoglobin.
FCOHb: Carboxyhemoqlobin measurements are used to determine the carboxyhemoglobin content of human blood as an aid in the diagnosis of carbon monoxide poisoning.
FMetHb: Methemoqlobin as a fraction of total hemoglobin.
FHHb: Reduced hemoglobin as a fraction of total hemoglobin.
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## Substantial Equivalence Comparison
## Substantial equivalence comparison table
| | ABL90 FLEX PLUS System<br>(This 510(k)) | ABL90 FLEX PLUS<br>(510(k) K160153) |
|--------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Manufacturer | Radiometer Medical | Radiometer Medical |
| Indications for Use | The ABL90 FLEX PLUS System is an<br>In Vitro diagnostic, portable,<br>automated analyzer that<br>quantitatively measures, pH, blood<br>gases ( $pO_2$ ), Oximetry ( $sO_2$ , ctHb,<br>$FO_2Hb$ , FCOHb, FMetHb, and FHHb),<br>in heparinized arterial and venous<br>whole blood. | The ABL90 FLEX analyzer is an In<br>Vitro diagnostic, portable, automated<br>analyzer that quantitatively<br>measures, pH, blood gases,<br>electrolytes, glucose, lactate and<br>oximetry in heparinized whole blood,<br>and neonatal bilirubin in heparinized<br>capillary, venous and arterial whole<br>blood.<br>Bilirubin measurements on the ABL90<br>FLEX PLUS analyzer are intended to<br>aid in assessing the risk of<br>kernicterus in neonates. |
| Intended Use | Measurement of pH, $pO_2$ , $sO_2$ , ctHb,<br>$FO_2Hb$ , FCOHb, FMetHb, and FHHb | Measurement of pH, $pO_2$ , $sO_2$ , ctHb,<br>$FO_2Hb$ , FCOHb, FMetHb, and FHHb |
| Intended use<br>environment | Laboratory environment, near patient<br>or point-of-care setting | Laboratory environment, near patient<br>or point-of-care setting |
| Prescription/OTC<br>Use | Prescription | Prescription |
| Sample requirements | | |
| Sample type | Heparinized whole blood (arterial,<br>venous) | Heparinized whole blood (arterial,<br>venous, capillary) |
| Compatible<br>sampling devices | Radiometer samplers (in S65 mode)<br>and non-Radiometer samplers (in S65<br>mode) | Radiometer samplers (in S65 mode)<br>and non-Radiometer samplers (in S65<br>mode) |
| Sample volume | 65 μL | 65 μL |
| Sample<br>preparation | With balanced heparin anticoagulant | With balanced heparin anticoagulant |
| Device design | | |
| Operating<br>principles | Potentiometry: pH<br>Optical: $pO_2$<br>Spectrophotometry: $sO_2$ , ctHb,<br>$FO_2Hb$ , FCOHb, FMetHb, and FHHb | Potentiometry: pH<br>Optical: $pO_2$<br>Spectrophotometry: $sO_2$ , ctHb,<br>$FO_2Hb$ , FCOHb, FMetHb, and FHHb |
| Major<br>components | Touch screen Barcode reader Sample mixer Inlet module Fluid transport system Oximetry module Electronics Software Printer Optional battery pack Communication ports | Touch screen Barcode reader Sample mixer Inlet module Fluid transport system Oximetry module Electronics Software Printer Optional battery pack Communication ports |
| | ABL90 FLEX PLUS System<br>(This 510(k)) | ABL90 FLEX PLUS<br>(510(k) K160153) |
| Consumables | Sensor cassette Solution pack | Sensor cassette Solution pack |
| Performance characteristics | | |
| Reportable<br>ranges | pH: 6.818 - 7.797<br>pO2: 30.1 - 488 mmHg<br>sO2: 3.3 - 100.0%<br>ctHb: 0.1 - 24.0 g/dL<br>FO2Hb: 3.3 - 98.5%<br>FCOHb: 1.00 - 92.2%<br>FMetHb: 0.5 - 91%<br>FHHb: 1.5 - 98.3% | pH: 6.818 - 7.797<br>pO2: 30.1 - 488 mmHg<br>sO2: 3.3 - 100.0%<br>ctHb: 0.1 - 24.0 g/dL<br>FO2Hb: 3.3 - 98.5%<br>FCOHb: 1.00 - 92.2%<br>FMetHb: 1.0 - 91%<br>FHHb: 2.4 - 98.5% |
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#### Analytical Performance Testing Summary
The ABL90 FLEX PLUS System has been tested for analytical performance, including tests for linearity, limit of blank, detection and quantification, precision, bias, interference, stability. The tests were conducted in general accordance with Clinical Laboratory Standards Institute (CLSI) guidelines, all of which are FDA-recognized consensus standards.
#### Linearity
Linearity testing was conducted in general accordance with CLSI EP06, Evaluation of the Linearity of Quantitative Measurement Procedures, 2nd Edition and EP39, A Hierarchical Approach to Selecting Surrogate Samples for the Evaluation of In Vitro Medical Laboratory Tests, 1st Edition. The resulting linearity intervals are listed in Table 1.
| Parameter | Linearity interval |
|-----------|--------------------|
| Ph | 6.605-7.997 |
| pO2 | 0.81-75.41 kPa |
| ctHb | 0.068-27.660 g/dL |
| sO2 | 2.18-100.22 % |
| FO2Hb | 2.18-98.96 % |
| FCOHb | 0.54-95.79 % |
| FMetHb | 0.49-95.61 % |
| FHHb | 0.53-98.37 % |
#### Table 1: I inearity results
#### Detection
Detection capability testing in terms of limit of blank (LoB), limit of detection (LoD) and limit of quantitation (LoQ) was conducted. in general accordance with CLSI EP17-A2, Evaluation of Detection Capability for Clinical Laboratory Measurement Procedures, and EP39, A Hierarchical Approach to Selecting Surrogate Samples for the Evaluation of In Vitro Medical Laboratory Tests, 1st Edition. Table 2 shows the results of the detection testing.
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| Parameter | Unit | Lower LoQ | Upper LoQ | |
|-----------|----------|-----------|-----------|-------|
| pH | - | 6.754 | 7.843 | |
| Parameter | Unit | LoB | LoD | LoQ |
| $pO_2$ | mmHg | N/A | N/A | 7.7 |
| | kPa | | | 1.02 |
| ctHb | g/dL | 0.03 | 0.09 | 0.09 |
| FHHb | % | 0.2 | 0.6 | 1.4 |
| | Fraction | 0.002 | 0.006 | 0.014 |
| $sO_2$ | % | N/A | N/A | 1.4 |
| | Fraction | | | 0.014 |
| $FO_2$ Hb | % | N/A | N/A | 1.4 |
| | Fraction | | | 0.014 |
| FCOHb | % | N/A | N/A | 0.7 |
| | Fraction | | | 0.007 |
| FMetHb | % | N/A | N/A | 0.3 |
| | Fraction | | | 0.003 |
Table 2: Detection results
N/A: Not applicable
#### Precision
Two precision studies were performed; both were in general accordance with CLSI EP05-A3, Evaluation of Precision of Quantitative Measurement Procedures.
#### Precision using stable, aqueous ampoule-based QC material
The primary endpoints of the study were repeatability and within laboratory precision for pooled across several sites. The secondary endpoint was reproducibility between sites. The sample material was Radiometer QUALICHECK5+ QC ampoules, a QC material that comes in four "levels". Testing occurred at three external sites. Table 3 presents the data on the primary and secondary endpoints.
| | Parameter | QC ampoule | N | Mean | Repeatability | | Within Lab Precision | | Reproducibility | |
|---------------|-----------|------------|------|------|---------------|------|----------------------|------|-----------------|-----|
| | | | | | SD | CV% | SD | CV% | SD | CV% |
| FCOHb<br>(%) | QC5+ L 1 | 243 | 5.9 | 0.03 | 0.6 | 0.06 | 1.0 | 0.11 | 1.8 | |
| | QC5+ L 2 | 244 | 2.8 | 0.03 | 1.1 | 0.08 | 2.9 | 0.13 | 4.7 | |
| | QC5+ L 3 | 244 | 20.0 | 0.02 | 0.1 | 0.05 | 0.3 | 0.05 | 0.3 | |
| | QC5+ L 4 | 244 | 10.1 | 0.02 | 0.2 | 0.03 | 0.3 | 0.06 | 0.6 | |
| FMetHb<br>(%) | QC5+ L 1 | 243 | 5.0 | 0.01 | 0.3 | 0.03 | 0.6 | 0.05 | 0.9 | |
| | QC5+ L 2 | 244 | 2.0 | 0.02 | 0.8 | 0.04 | 2.1 | 0.05 | 2.3 | |
| | QC5+ L 3 | 244 | 10.0 | 0.02 | 0.2 | 0.02 | 0.2 | 0.03 | 0.3 | |
| | QC5+ L 4 | 244 | 20.1 | 0.04 | 0.2 | 0.06 | 0.3 | 0.09 | 0.4 | |
Table 3: Precision results using QC materials
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RADIOME
| Parameter | QC ampoule | N | Mean | Repeatability | | Within Lab<br>Precision | | Reproducibility | |
|----------------|------------|-----|-------|---------------|-----|-------------------------|-----|-----------------|-----|
| | | | | SD | CV% | SD | CV% | SD | CV% |
| FHHb<br>(%) | QC5+ L 1 | 243 | 44.6 | 0.03 | 0.1 | 0.05 | 0.1 | 0.13 | 0.3 |
| | QC5+ L 2 | 244 | 3.0 | 0.02 | 0.7 | 0.06 | 2.0 | 0.09 | 3.2 |
| | QC5+ L 3 | 244 | 21.0 | 0.01 | 0.1 | 0.03 | 0.1 | 0.03 | 0.1 |
| | QC5+ L 4 | 244 | 66.3 | 0.05 | 0.1 | 0.07 | 0.1 | 0.13 | 0.2 |
| FO2Hb<br>(%) | QC5+ L 1 | 243 | 44.6 | 0.03 | 0.1 | 0.05 | 0.1 | 0.05 | 0.1 |
| | QC5+ L 2 | 244 | 92.2 | 0.04 | 0.0 | 0.06 | 0.1 | 0.06 | 0.1 |
| | QC5+ L 3 | 244 | 49.0 | 0.02 | 0.1 | 0.05 | 0.1 | 0.05 | 0.1 |
| | QC5+ L 4 | 244 | 3.5 | 0.01 | 0.3 | 0.03 | 0.7 | 0.03 | 0.8 |
| pH | QC5+ L 1 | 243 | 7.066 | 0.0034 | 0.0 | 0.0034 | 0.0 | 0.0038 | 0.1 |
| | QC5+ L 2 | 244 | 7.390 | 0.0018 | 0.0 | 0.0018 | 0.0 | 0.0019 | 0.0 |
| | QC5+ L 3 | 244 | 7.582 | 0.0018 | 0.0 | 0.0018 | 0.0 | 0.0018 | 0.0 |
| | QC5+ L 4 | 244 | 6.784 | 0.0037 | 0.1 | 0.0037 | 0.1 | 0.0041 | 0.1 |
| pO2<br>(mmHg) | QC5+ L 1 | 243 | 154.3 | 1.91 | 1.2 | 2.87 | 1.9 | 3.13 | 2.0 |
| | QC5+ L 2 | 244 | 100.3 | 1.13 | 1.1 | 2.01 | 2.0 | 2.01 | 2.0 |
| | QC5+ L 3 | 244 | 56.1 | 0.95 | 1.7 | 1.33 | 2.4 | 1.33 | 2.4 |
| | QC5+ L 4 | 244 | 310.0 | 3.00 | 1.0 | 5.51 | 1.8 | 6.95 | 2.2 |
| sO2<br>(%) | QC5+ L 1 | 243 | 50.0 | 0.01 | 0.0 | 0.02 | 0.0 | 0.06 | 0.1 |
| | QC5+ L 2 | 244 | 96.9 | 0.03 | 0.0 | 0.07 | 0.1 | 0.12 | 0.1 |
| | QC5+ L 3 | 244 | 70.0 | 0.01 | 0.0 | 0.03 | 0.0 | 0.03 | 0.0 |
| | QC5+ L 4 | 244 | 5.0 | 0.01 | 0.2 | 0.03 | 0.5 | 0.03 | 0.5 |
| ctHb<br>(g/dL) | QC5+ L 1 | 243 | 8.1 | 0.02 | 0.2 | 0.03 | 0.4 | 0.04 | 0.6 |
| | QC5+ L 2 | 244 | 12.9 | 0.03 | 0.2 | 0.04 | 0.3 | 0.06 | 0.5 |
| | QC5+ L 3 | 244 | 19.3 | 0.03 | 0.2 | 0.06 | 0.3 | 0.09 | 0.5 |
| | QC5+ L 4 | 244 | 2.7 | 0.01 | 0.4 | 0.02 | 0.6 | 0.02 | 0.6 |
N: Number of data points for analysis SD: Standard Deviation CV%: %Coefficient of Variation QC5+ L X: QUALICHECK5+ Level X
#### Precision using blood
The primary endpoint of the study was repeatability, designated SD, pooled across sites. Two levels of concentration were covered for all parameters. Testing was conducted in both samples collection modes: syringe/S65 mode and short probe/SP65 mode. Table 4 summarize the results of the study.
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| Parameter (unit) | N | Test interval | Mean | Repeatability<br>SD | CV% |
|------------------|-----|-----------------|--------|---------------------|------|
| S65 Mode | | | | | |
| pH (pH unit) | 18 | 6.9 - <7.2 | 7.141 | 0.003 | 0.04 |
| | 38 | 7.2 - <7.35 | 7.298 | 0.002 | 0.03 |
| | 130 | 7.35 - <7.45 | 7.405 | 0.003 | 0.04 |
| | 60 | 7.45 - <7.55 | 7.480 | 0.003 | 0.04 |
| pO2 (mmHg) | 48 | 30.1 - <60 | 41.904 | 0.252 | 0.60 |
| | 114 | 60 - <83 | 73.424 | 1.031 | 1.40 |
| | 42 | 83 - <108 | 90.771 | 1.198 | 1.32 |
| | 18 | 108 - <150 | 124.50 | 0.850 | 0.68 |
| ctHb (g/dL) | 24 | 6.750 - 7.950 | 7.533 | 0.082 | 1.08 |
| | 184 | 8.050 - 13.250 | 10.784 | 0.083 | 0.77 |
| | 34 | 13.550 - 17.150 | 14.941 | 0.077 | 0.51 |
| sO2 (%) | 34 | 3.3 - <80 | 64.221 | 0.890 | 1.39 |
| | 36 | 80 - <94 | 91.767 | 0.147 | 0.16 |
| | 158 | 94 - <100 | 96.934 | 0.177 | 0.18 |
| FO2Hb (%) | 34 | 3.3 - <80 | 63.215 | 0.918 | 1.45 |
| | 64 | 80 - <94 | 91.677 | 0.146 | 0.16 |
| | 130 | 94 - <98.5 | 96.083 | 0.165 | 0.17 |
| FMetHb (%) | 62 | 0.5 - <1.5 | 0.797 | 0.070 | 8.73 |
| | 4 | 1.5 - <20 | 1.825 | 0.050 | 2.74 |
| | 12 | 20 - <50 | 40.667 | 0.058 | 0.14 |
| FCOHb (%) | 162 | 1 - <5 | 1.323 | 0.059 | 4.48 |
| | 6 | 5 - <35 | 32.733 | 0.058 | 0.18 |
| | 12 | 35 - <50 | 39.492 | 0.065 | 0.16 |
| | 112 | 1.5 - <5 | 2.876 | 0.198 | 6.87 |
| FHHb (%) | 34 | 10 - <40 | 30.297 | 0.860 | 2.84 |
| | 4 | 40 - <70 | 53.350 | 0.158 | 0.30 |
| SP65 Mode | | | | | |
| pH (pH unit) | 18 | 6.9 - <7.2 | 7.135 | 0.003 | 0.05 |
| | 33 | 7.2 - <7.35 | 7.302 | 0.001 | 0.02 |
| | 133 | 7.35 - <7.45 | 7.402 | 0.002 | 0.02 |
| | 60 | 7.45 - <7.55 | 7.482 | 0.001 | 0.01 |
| pO2 (mmHg) | 49 | 30.1 - <60 | 42.322 | 0.197 | 0.47 |
| | 96 | 60 - <83 | 73.383 | 0.842 | 1.15 |
| | 55 | 83 - <108 | 91.136 | 1.343 | 1.47 |
| | 20 | 108 - <150 | 121.85 | 1.204 | 0.99 |
| ctHb (g/dL) | 16 | 6.5 - <8 | 7.456 | 0.066 | 0.89 |
| | 188 | 8 - <13.5 | 10.598 | 0.091 | 0.86 |
| | 36 | 13.5 - <17.5 | 14.931 | 0.069 | 0.46 |
| sO2 (%) | 36 | 3.3 - <80 | 62.644 | 0.282 | 0.45 |
| | 33 | 80 - <94 | 91.858 | 0.203 | 0.22 |
| | 155 | 94 - <100 | 97.126 | 0.234 | 0.24 |
| FO2Hb (%) | 36 | 3.3 - <80 | 61.633 | 0.306 | 0.50 |
| | 59 | 80 - <94 | 91.763 | 0.181 | 0.20 |
| | 131 | 94 - <98.5 | 96.327 | 0.185 | 0.19 |
| FMetHb (%) | 62 | 0.5 - <1.5 | 0.777 | 0.070 | 9.04 |
| | 4 | 1.5 - <20 | 1.825 | 0.050 | 2.74 |
| | 12 | 20 - <50 | 40.575 | 0.050 | 0.12 |
| FCOHb (%) | 156 | 1 - <5 | 1.317 | 0.063 | 4.78 |
| | 6 | 5 - <35 | 32.683 | 0.041 | 0.12 |
| | 12 | 35 - <50 | 40.367 | 0.058 | 0.14 |
| FHHb (%) | 112 | 1.5 - <5 | 2.876 | 0.198 | 6.87 |
| Parameter (unit) | N | Test interval | Mean | Repeatability | |
| | | | | SD | CV% |
| | 30 | 10 - <40 | 31.060 | 0.292 | 0.94 |
| | 8 | 40 - <70 | 51.963 | 0.137 | 0.26 |
Table 4: Precision results using whole blood
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N: Number of data points for analysis Test interval: Range of values studied SD: Standard Deviation CV%: %Coefficient of Variation
#### Method comparison
Bias was determined by conducting a method comparison study in general accordance with CLSI EP09c, 3rd Edition, Measurement Procedure Comparison and Bias Estimation Using Patient Samples. The comparator device was the ABL90 FLEX PLUS analyzer as it was designed at the time of the clearance of K160153, in terms of its characteristics related to analytical performance. Testing was conducted using both arterial and venous blood, and in both samples collection modes: syringe/S65 mode and short probe/SP65 mode. Analysis was performed by linear regression over the reportable range. Results are presented in Table 5 and Table 6.
Table 5: Method comparison results using reportable ranges specified in the protocol
| Parameter | Blood<br>type | Mode | n | Min-max | Intercept | Slope | R2 | Medical<br>decision<br>point | Bias at<br>MD |
|---------------------|---------------|------|-----|-------------|-----------|-------|-------|------------------------------|---------------|
| pO2<br>(mmHg) | A | S65 | 222 | 32.7-476 | 0.720 | 0.995 | 0.999 | 83.000 | 0.344 |
| | A | SP65 | 216 | 32.5-471 | -0.065 | 1.002 | 0.998 | | 0.119 |
| pO2<br>(mmHg) | V | S65 | 191 | 30.1-476 | 0.044 | 0.994 | 0.999 | | -0.454 |
| | V | SP65 | 192 | 30.1-471 | -0.194 | 1.001 | 0.999 | | -0.128 |
| pH<br>(pH<br>scale) | A | S65 | 226 | 6.848-7.797 | 0.015 | 0.998 | 0.999 | 7.350 | -0.003 |
| | A | SP65 | 220 | 6.843-7.796 | 0.025 | 0.996 | 0.999 | | -0.003 |
| pH<br>(pH<br>scale) | V | S65 | 235 | 6.848-7.797 | 0.019 | 0.997 | 0.999 | | -0.003 |
| | V | SP65 | 225 | 6.843-7.796 | 0.014 | 0.998 | 0.999 | | -0.003 |
| sO2<br>(%) | A | S65 | 213 | 3.3-100 | -0.235 | 1.005 | 0.999 | 94.000 | 0.193 |
| | A | SP65 | 204 | 3.4-100 | -0.033 | 1.003 | 1.000 | | 0.280 |
| sO2<br>(%) | V | S65 | 222 | 3.3-99.3 | -0.078 | 1.000 | 0.998 | | -0.083 |
| | V | SP65 | 212 | 3.4-99.2 | -0.040 | 1.000 | 0.998 | | -0.003 |
| FO2Hb<br>(%) | A | S65 | 202 | 3.3-98.5 | -0.319 | 1.006 | 0.999 | 94.000 | 0.235 |
| | A | SP65 | 192 | 3.4-98.5 | -0.075 | 1.003 | 0.999 | | 0.210 |
| FO2Hb<br>(%) | V | S65 | 222 | 3.3-98 | -0.021 | 0.999 | 0.998 | | -0.136 |
| | V | SP65 | 213 | 3.4-98.1 | 0.083 | 0.997 | 0.998 | | -0.180 |
| FHHb<br>(%) | A | S65 | 131 | 1.4-95.8 | -0.041 | 1.003 | 1.000 | 10.000 | -0.011 |
| | A | SP65 | 119 | 1.4-95.4 | -0.159 | 1.000 | 1.000 | | -0.156 |
| FHHb<br>(%) | V | S65 | 220 | 3.1-95.8 | 0.051 | 1.000 | 0.998 | | 0.056 |
| | V | SP65 | 211 | 2.8-95.4 | 0.004 | 1.000 | 0.998 | | 0.001 |
| FCOHb<br>(%) | A | S65 | 133 | 1-87.6 | -0.237 | 1.001 | 1.000 | 10.000 | -0.223 |
| | A | SP65 | 123 | 1-90.3 | -0.359 | 0.993 | 0.999 | | -0.429 |
| FCOHb<br>(%) | V | S65 | 197 | 1-87.6 | -0.394 | 1.003 | 0.999 | | -0.360 |
| | V | SP65 | 189 | 1-90.3 | -0.409 | 0.994 | 0.999 | | -0.474 |
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| Parameter | Blood type | Mode | n | Min-max | Intercept | Slope | R2 | Medical decision point | Bias at MD |
|------------|------------|------|----|---------|-----------|-------|-------|------------------------|------------|
| FMetHb (%) | A | S65 | 32 | 0.5-86 | -0.239 | 1.008 | 1.000 | 1.500 | -0.227 |
| | | SP65 | 26 | 0.5-86 | -0.316 | 1.012 | 1.000 | | -0.298 |
| | V | S65 | 28 | 0.5-86 | -0.209 | 1.007 | 1.000 | | -0.198 |
| | | SP65 | 27 | 0.5-86 | -0.222 | 1.010 | 1.000 | | -0.206 |
A: Arterial
V: Venous
Min-max: Range of values measured
Table 6: Method comparison results, arterial and venous combined, additional medical decision levels
| Parameter | n | Intercept | Slope | R2 | Medical<br>decision<br>point | Bias at MD |
|---------------|-----|-----------|-------|-------|------------------------------|------------|
| S65 Mode | | | | | | |
| COHb (%) | 322 | -0.332 | 1.002 | 0.999 | 10.000 | -0.307 |
| | | | | | 25.000 | -0.271 |
| | | | | | 200.00 | -2.028 |
| HHb (%) | 338 | -0.023 | 1.003 | 0.999 | 10.000 | 0.005 |
| | | | | | 5.000 | -0.009 |
| | | | | | 36.000 | 0.013 |
| MetHb (%) | 49 | -0.229 | 1.008 | 1.000 | 1.500 | -0.217 |
| | | | | | 20.000 | -0.075 |
| | | | | | 146.00 | 0.290 |
| O2Hb (%) | 411 | -0.492 | 1.007 | 0.999 | 94.000 | 0.160 |
| | | | | | 80.000 | 0.063 |
| pH (pH scale) | 442 | 0.018 | 0.997 | 0.998 | 7.350 | -0.003 |
| | | | | | 7.450 | -0.003 |
| pO2 (mmHg) | 401 | 0.111 | 0.999 | 0.999 | 83.000 | 0.002 |
| | | | | | 108.00 | -0.031 |
| sO2 (%) | 422 | -0.441 | 1.006 | 0.999 | 94.000 | 0.134 |
| | | | | | 80.000 | 0.048 |
| tHb (g/dL) | 427 | 0.015 | 1.006 | 0.994 | 8.400 | 0.068 |
| | | | | | 17.500 | 0.126 |
| SP65 Mode | | | | | | |
| COHb (%) | 305 | -0.394 | 0.993 | 0.999 | 10.000 | -0.462 |
| | | | | | 25.000 | -0.564 |
| | | | | | 200.00 | -2.045 |
| HHb (%) | 318 | -0.117 | 1.003 | 0.999 | 10.000 | -0.089 |
| | | | | | 5.000 | -0.103 |
| | | | | | 36.000 | -0.169 |
| MetHb (%) | 42 | -0.290 | 1.012 | 1.000 | 1.500 | -0.272 |
| | | | | | 20.000 | -0.055 |
| | | | | | 146.00 | 0.259 |
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| Parameter | n | Intercept | Slope | R2 | Medical<br>decision<br>point | Bias at MD |
|---------------|-----|-----------|-------|-------|------------------------------|------------|
| O2Hb (%) | 393 | -0.381 | 1.005 | 0.999 | 94.000 | 0.123 |
| O2Hb (%) | 393 | -0.381 | 1.005 | 0.999 | 80.000 | 0.048 |
| pH (pH scale) | 427 | 0.023 | 0.996 | 0.999 | 7.350 | -0.003 |
| pH (pH scale) | 427 | 0.023 | 0.996 | 0.999 | 7.450 | -0.003 |
| pO2 (mmHg) | 396 | -0.166 | 1.003 | 0.999 | 83.000 | 0.042 |
| pO2 (mmHg) | 396 | -0.166 | 1.003 | 0.999 | 108.00 | 0.105 |
| sO2 (%) | 404 | -0.395 | 1.006 | 0.999 | 94.000 | 0.212 |
| sO2 (%) | 404 | -0.395 | 1.006 | 0.999 | 80.000 | 0.122 |
| tHb (g/dL) | 412 | 0.069 | 1.001 | 0.996 | 8.400 | 0.076 |
| tHb (g/dL) | 412 | 0.069 | 1.001 | 0.996 | 17.500 | 0.084 |
#### Interference
Interfering substances were evaluated based on testing conducted in general accordance with CLSI, EP07, Interference Testing in Clinical Chemistry, 3rd Edition, and CLSI EP37, Supplemental Tables for Interference Testing in Clinical Chemistry, 1* Edition. The interference testing consists of two parts: paired-difference and dose-response studies. The paired-difference study was conducted on a large panel of likely interferents, using clinically significant amount of the interferents. Dose-response studies were only conducted in cases where a clinically significant interferent effect was noted during the paired different study. Table 7 summarizes the testing that was performed. Specific values for level of interference are described in Table 8.
| Interferent | pH | pO2 | tHb | sO2 | FO2Hb | FHHb | FCOHb | FMetHb |
|----------------------------------|----|-----|-----|-----|-------|------|-------|--------|
| Intralipid | - | - | × | × | × | × | × | × |
| Hemolysis | - | - | - | - | - | - | - | - |
| Bilirubin (unconj) | - | - | - | - | - | × | - | - |
| Bilirubin (conj) | - | - | - | - | - | × | - | - |
| Biotin | - | - | - | - | - | - | - | - |
| Propofol | - | - | - | - | - | - | - | - |
| Potassium @ high level | - | - | - | - | - | - | - | - |
| Sodium @ high level | - | - | - | - | - | - | - | - |
| Calcium @ high level | - | - | - | - | - | - | - | - |
| pH @ low level | - | - | - | - | - | - | - | × |
| pH @ high level | - | - | - | - | - | - | - | × |
| Betacarotene | - | - | - | - | - | - | - | - |
| Cardio green = indocyanine green | - | - | - | - | - | × | - | × |
| Cyanocobalamin | - | - | × | - | × | - | × | × |
| Evans Blue | - | - | - | - | - | - | - | - |
| HiCN | - | - | × | × | × | × | × | × |
| Hydroxo-cobalamine hydrochloride | - | - | × | - | × | × | × | × |
Table 7: Interference testing
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| Interferent | pH | pO2 | tHb | SO2 | FO₂Hb | FHHb | FCOHb | FMetHb | |
|--------------------------------|----|-----|-----|-----|-------|------|-------|--------|---|
| Methylene Blue | | | X | X | X | X | X | X | |
| Patent Blue V = sulphan Blue | | | - | - | - | X | - | - | |
| Rifampicin | | | - | - | - | - | - | - | |
| SHb | | | X | X | X | X | X | X | |
| Sodium Nitroprusside dihydrate | | | - | - | - | X | - | - | |
| Triglyceride | | | - | - | - | X | - | X | |
| HbF (fetal hemoglobin) | | | | - | - | - | - | - | - |
| Fluoroescein | | - | X | X | X | X | X | X | |
#### Key
Image /page/14/Figure/3 description: The image shows a legend describing the meaning of different colors in a chart or table. The first entry indicates that the color white represents 'No clinically significant interference'. The second entry indicates that the color gray represents 'Clinically significant interference'. The third entry indicates that the color light red represents 'Interferent not relevant to be tested for this parameter'.
Image /page/14/Picture/4 description: The image shows two rows of a table. The first row has a dash symbol in the right cell, and the second row has an "X" symbol in the right cell. The left cells of both rows contain the word "ference".
#### Table 8: Interference values
| Interferent | Maximum test<br>concentration | Highest<br>concentration level<br>where interference<br>was not significant | Impact on result for<br>maximum test<br>concentration |
|-------------------------------------|-------------------------------|-----------------------------------------------------------------------------|-------------------------------------------------------|
| ctHb (test level: 10 g/dL) | | | |
| Cyanocobalamin | 200 mg/dL | 25 mg/dL | 1.44 g/dL * |
| Fluorescein | 40 mg/dL | 30 mg/dL | -0.72 g/dL * |
| HiCN | 30% | 12% | 1.2 g/dL * |
| Hydroxo-cobalamine<br>hydrochloride | 200 mg/dL | 25 mg/dL | 2.66 g/dL * |
| Intralipid | 2000 mg/dL | 1600 mg/dL;<br>No measurement<br>result reported above<br>1600 mg/dL | Error message<br>"Turbidity too high." |
| Methylene Blue | 6 mg/dL | 0.38 mg/dL | -3.94 g/dL * |
| SHb | 10% | 5% | -0.86 g/dL ** |
| ctHb (test level: 20 g/dL) | | | |
| Cyanocobalamin | 200 mg/dL | 150 mg/dL | 0.81 g/dL * |
| Fluorescein | 40 mg/dL | 30 mg/dL | -1.95 g/dL * |
| HiCN | 30% | 10% | 2.4 g/dL * |
| Hydroxo-cobalamine<br>hydrochloride | 200 mg/dL | 50 mg/dL | 2.66 g/dL * |
| Intralipid | 2000 mg/dL | 1600 mg/dL;<br>No measurement<br>result reported above<br>1600 mg/dL | Error message<br>"Turbidity too high." |
| Methylene Blue | 6 mg/dL | 0.75 mg/dL | -4.15 g/dL * |
| SHb | 10% | 2.5% | -1.38 g/dL ** |
| sO2 (test level: 90%) | | | |
| Fluorescein | 40 mg/dL | 20 mg/dL | -5.62%* |
| Interferent | Maximum test<br>concentration | Highest<br>concentration level<br>where interference<br>was not significant | Impact on result for<br>maximum test<br>concentration |
| HICN | 30% | 6.7% | -13%* |
| Intralipid | 2000 mg/dL | 1600 mg/dL;<br>No measurement<br>result reported above<br>1600 mg/dL | Error message<br>"Turbidity too high." |
| Methylene Blue | 6 mg/dL | 0.75 mg/dL | 3.36%* |
| sO2 (test level: 100%) | | | |
| Fluorescein | 40 mg/dL | 10 mg/dL | -6.58%* |
| HICN | 30% | 6.3% | -14%* |
| Intralipid | 2000 mg/dL | 1600 mg/dL;<br>No measurement<br>result reported above<br>1600 mg/dL | Error message<br>"Turbidity too high." |
| Methylene Blue | 6 mg/dL | 1.5 mg/dL | 4.40%* |
| FO2Hb (test level: 90%) | | | |
| Cyanocobalamin | 200 mg/dL | 150 mg/dL | -7.1%* |
| Fluorescein | 40 mg/dL | No interference | 2.4%* |
| HICN | 30% | 3.1% | -37%* |
| Hydroxo-cobalamine<br>hydrochloride | 200 mg/dL | 38 mg/dL | -14.7%* |
| Intralipid | 2000 mg/dL | 1600 mg/dL;<br>No measurement<br>result reported above<br>1600 mg/dL | Error message<br>"Turbidity too high." |
| Methylene Blue | 6 mg/dL | 1.5 mg/dL | 27.0%* |
| SHb | 10% | 5% | -7.9%** |
| FO2Hb (test level: 100%) | | | |
| Cyanocobalamin | 200 mg/dL | 100 mg/dL | -8.5%* |
| Fluorescein | 40 mg/dL | 20 mg/dL | 9.16%* |
| HICN | 30% | 3.2% | -40%* |
| Hydroxo-cobalamine<br>hydrochloride | 200 mg/dL | 38 mg/dL | -16.7%* |
| Intralipid | 2000 mg/dL | 1600 mg/dL;<br>No measurement<br>result reported above<br>1600 mg/dL | Error message<br>"Turbidity too high." |
| Methylene Blue | 6 mg/dL | 1.1 mg/dL | 34.3%* |
| SHb | 10% | 5% | -14.6%** |
| FHHb (test level: 2.4%) | | | |
| Bilirubin (unconj) | 0.684 mmol/L<br>40 mg/dL | No interference | -0.26% |
| Bilirubin (conj) | 0.475 mmol/L<br>40 mg/dL | No interference | -0.44% |
| Cardio green (indocyanine green) | 3 mg/dL | 0.75 mg/dL | -1.16% |
| Fluorescein | 40 mg/dL | 10 mg/dL | 7.68%* |
| HICN | 30% | 3.6% | 8.9%* |
| Interferent | Maximum test<br>concentration | Highest<br>concentration level<br>where interference<br>was not significant | Impact on result for<br>maximum test<br>concentration |
| Hydroxo-cobalamine<br>hydrochloride | 200 mg/dL | No interference | -0.88%* |
| Intralipid | 2000 mg/dL | 800 mg/dL;<br>No measurement<br>result reported above<br>1600 mg/dL. | Error message<br>"Turbidity too high." |
| Methylene Blue | 6 mg/dL | 0.38 mg/dL | -4.44%* |
| Patent Blue V (sulphan Blue) | 1 mg/dL | 0.06 mg/dL | -1.78% |
| SHb | 10% | 0.5% | 34.5%** |
| Sodium nitroprusside dihydrate | 87 µg/L | No interference | -0.08% |
| Triglyceride | 1600 mg/dL | 800 mg/dL | 1.42% |
| FHHb (test level: 10%) | | | |
| Bilirubin (unconj) | 0.684 mmol/L<br>40 mg/dL | 0.17 mmol/L<br>10 mg/dL | -0.82%* |
| Bilirubin (conj) | 0.475 mmol/L<br>40 mg/dL | 0.06 mmol/L<br>5 mg/dL | -0.88%* |
| Cardio green (indocyanine green) | 3 mg/dL | 0.75 mg/dL | -2.0% |
| Fluorescein | 40 mg/dL | 5 mg/dL | 7.34%* |
| HiCN | 30% | 4.5% | 6.1%* |
| Hydroxo-cobalamine<br>hydrochloride | 200 mg/dL | 150 mg/dL | -1.26%* |
| Intralipid | 2000 mg/dL | 1200 mg/dL;<br>No measurement<br>result reported above<br>1600 mg/dL. | Error message<br>"Turbidity too high." |
| Methylene Blue | 6 mg/dL | 0.38 mg/dL | -1.58%* |
| Patent Blue V (sulphan Blue) | 1 mg/dL | 0.006 mg/dL | -0.98% |
| SHb | 10% | 2.5% | 17.2%** |
| Sodium nitroprusside dihydrate | 87 µg/L | 22 µg/L | -0.52% |
| Triglyceride | 1600 mg/dL | 1200 mg/dL | 1.20% |
| FCOHb (test level: 1%) | | | |
| Cyanocobalamin | 200 mg/dL | 50 mg/dL | 1.7%* |
| Fluorescein | 40 mg/dL | 2.5 mg/dL | -10.64%* |
| HiCN | 30% | 3.4% | 6.3%* |
| Intralipid | 2000 mg/dL | 1600 mg/dL;<br>No measurement<br>result reported above<br>1600 mg/dL | Error message<br>"Turbidity too high." |
| Methylene Blue | 6 mg/dL | No interference | 0.64%* |
| SHb | 10% | 1.25% | 1.08%** |
| FCOHb (test level: 10%) | | | |
| Cyanocobalamin | 200 mg/dL | 100 mg/dL | 1.1%* |
| Fluorescein | 40 mg/dL | 3.75 mg/dL | -10.84%* |
| HiCN | 30% | 9.6% | 2.9%* |
| Interferent | Maximum test<br>concentration | Highest<br>concentration level<br>where interference<br>was not significant | Impact on result for<br>maximum test<br>concentration |
| Intralipid | 2000 mg/dL | 1600 mg/d;L<br>No measurement<br>result reported above<br>1600 mg/dL | Error message<br>"Turbidity too high." |
| Methylene Blue | 6 mg/dL | 1.5 mg/dL | 1.88%* |
| SHb | 10% | 2.5% | 1.58%** |
| FMetHb (test level: 1.0%) | | | |
| Cardio green (indocyanine green) | 3 mg/dL | 1.5 mg/dL | -1.48% |
| Cyanocobalamin | 200 mg/dL | 12.5 mg/dL | 5.44%* |
| Fluorescein | 40 mg/dL | 30 mg/dL | -9.88%* |
| HiCN | 30% | 1.1% | 24%* |
| Hydroxo-cobalamine<br>hydrochloride | 200 mg/dL | 8 mg/dL | 13.1%* |
| Intralipid | 2000 mg/dL | 1200 mg/dL<br>No measurement<br>result reported above<br>1600 mg/dL | Error message<br>"Turbidity too high." |
| Methylene Blue | 6 mg/dL | 0.08 mg/dL | -33%* |
| pH low | 6.8 | No interference | 0.96% |
| pH high | 8.0 | No interference | -0.76% |
| SHb | 10% | No interference | -0.7%** |
| Triglyceride | 1600 mg/dL | 1200 mg/dL | 0.96% |
| FMetHb (test level: 10%) | | | |
| Cardio green (indocyanine green) | 3 mg/dL | 1.5 mg/dL | -1.26% |
| Cyanocobalamin | 200 mg/dL | 12.5 mg/dL | 4.28%* |
| Fluorescein | 40 mg/dL | 30 mg/dL…
