The QT ECG System is intended to acquire, record and process an electrocardiographic signal so that it can be transmitted digitally via Bluetooth technology to a cell-phone or mobile device, then to a remote location. The QT ECG System is indicated for use on infants, children and adults. It is designed to be operated by adults in the home, or by healthcare workers in non-acute care clinical facilities (such as nursing homes, skilled nursing facilities), and in professional healthcare facilities (such as clinics, hospitals, and ambulances) to record and transmit a 12- lead ECG and rhythm strip in near real-time to enable review at a physician's office, hospital or other medical receiving centers.

Device Description

The QT ECG system is a non-defibrillator-proof, hand-held, cordless 12-lead electrocardiograph (ECG) system with Bluetooth connectivity. The QT ECG system consists of 5 maior components:

The QT ECG Recorder-Compact device that records 12-lead, resting electrocardiograms, then transmits the recorded data to a mobile device (smartphone, tablet, etc.) paired via Bluetooth. A Bluetooth-enabled mobile device (not included) is needed to operate the QT ECG Recorder, and to send the recorded rhythm strip to a cardiologist or licensed physician for review.
The QT ECG Electrode Strip-Disposable, patented electrodes that are prepositioned on a self-adhesive strip.
The QT ECG App - Software that lets the user uses their mobile device to operate the QT ECG recorder, then send the recorded data via cloud to a certified medical professional for review.
Analysis The analysis module provides ECG measurement from the collected data. It does not make any interpretation of the intervals provided based on factors such as heart rate, QRS duration, etc.
Web Service - The web service provides an interface for communication. The recorded ECG data is saved temporarily on the mobile device until it is transferred via the Internet to the cloud server. The QT ECG System does not have monitoring capabilities and does not have diagnostic alarm function. The QT ECG System is indicated for use on infants, children and adults. It is designed to be operated by adults in the home, or by healthcare workers in non-acute care clinical facilities (such as nursing homes, skilled nursing facilities), and in professional healthcare facilities (such as clinics, hospitals, and ambulances) to record and transmit a 12- lead ECG and rhythm strip in near real-time to enable review at a physician's office, hospital or other medical receiving centers.

AI/ML Overview

The provided text describes the QT ECG (QTERD100) device and its submission for FDA clearance. The submission, K233521, is a Special 510(k) comparing the device to a previously cleared version (K220795). The changes primarily relate to an expanded indication for use to include Emergency Medical Services (EMS) environments and updated environmental operating conditions and supported mobile devices.

Here's an analysis of the acceptance criteria and study data based on the provided text:

1. Table of Acceptance Criteria and Reported Device Performance

The document presents a comparison between the subject device (K233521) and the original device (K220795), focusing on the differences. The "Acceptance Criteria" column explicitly states the criteria for the tests conducted to validate these differences.

Device Change	Acceptance Criteria	Summary of Results
Indications for Use (addition of EMS)	Pass the test according to IEC 60601-1-12.	Pass. The risk is controlled. The document: Risk Management Plan, Risk Control Report, Risk Management Summary, Report of IEC 60601-1-12
Storage and transport temperature	(Implicit: device functions within new temperature range)	(No explicit "Pass" for this row, but overall "Pass" for the change)
Operating Temperature	(Implicit: device functions within new temperature range)	(No explicit "Pass" for this row, but overall "Pass" for the change)
Storage and Transport Atmospheric Pressure	(Implicit: device functions within new atmospheric pressure range)	(No explicit "Pass" for this row, but overall "Pass" for the change)
Operating Atmospheric Pressure	(Implicit: device functions within new atmospheric pressure range)	(No explicit "Pass" for this row, but overall "Pass" for the change)
Ingress Protection Rating (IP33 vs IP22)	(Implicit: device meets new IP33 rating)	(No explicit "Pass" for this row, but the "Summary of Results" column isn't provided for this specific change. However, the overall conclusion states all safety and performance tests were passed.)
Package	N/A (change in packaging format, no performance impact expected)	N/A
Quick guide	N/A (simplification for risk reduction, no performance impact expected)	N/A
Mobile device (updated supported models/OS)	Pass criteria according to test reports: Unit Test, Integration Test, System Test	Pass. The risk is controlled. The document: Risk_Management_Plan, Risk_Control_Report, Risk_Management_Summary, Software Test reports: Unit Test, Integration Test, System Test

2. Sample Size Used for the Test Set and Data Provenance

The provided document does not specify sample sizes for any of the tests mentioned (e.g., IEC 60601-1-12, software tests).

The data provenance is also not explicitly stated in terms of country of origin or whether it was retrospective or prospective. The document mentions tests being conducted "according to IEC 60601-1-12," which implies standard compliance testing, but doesn't detail the origin of the test data.

3. Number of Experts Used to Establish the Ground Truth for the Test Set and Qualifications of Those Experts

The document does not provide information regarding the use of experts to establish a ground truth for the test set, nor does it mention their number or qualifications. The tests conducted appear to be primarily engineering and safety compliance tests rather than clinical studies requiring expert ground truth for interpretation of ECG data.

4. Adjudication Method for the Test Set

Since there's no mention of experts establishing a ground truth or interpreting data, there's no information about an adjudication method.

5. Multi-Reader Multi-Case (MRMC) Comparative Effectiveness Study

The document does not mention a multi-reader multi-case (MRMC) comparative effectiveness study. The device is described as acquiring, recording, and transmitting ECG signals for review by a physician, but there's no study presented that evaluates the performance of human readers with or without AI assistance, or an effect size. The "Analysis module" for the device provides ECG measurements but "does not make any interpretation."

6. Standalone (Algorithm Only Without Human-in-the-Loop Performance) Study

The document describes the device's "Analysis module" which "provides ECG measurement from the collected data. It does not make any interpretation of the intervals provided based on factors such as heart rate, QRS duration, etc." This indicates that the device itself performs some algorithmic processing (measurement) but does not provide diagnostic interpretation. Therefore, a standalone diagnostic performance study (algorithm only) as typically understood for AI-based diagnostic devices, is not described here. The presented studies focus on safety, electrical performance, and software validation.

7. Type of Ground Truth Used

Given the nature of the tests (compliance with standards like IEC 60601-1-12, software validation), the "ground truth" would be defined by the technical specifications of the standards themselves (e.g., passing specific electrical tests, proper software function as per design documents) rather than expert consensus, pathology, or outcomes data related to ECG interpretation. The document does not describe studies requiring such clinical ground truth.

8. Sample Size for the Training Set

The document does not mention a training set sample size. Since the device's "Analysis module" provides measurements but no interpretation, it's unlikely to involve machine learning models that require extensive training data in the traditional sense for diagnostic capabilities. The software validation tests mentioned ("Unit Test, Integration Test, System Test") are for functional correctness rather than training predictive models.

9. How the Ground Truth for the Training Set Was Established

As no training set is described, there is no information on how ground truth for a training set was established.

Summary

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Image /page/0/Picture/0 description: The image shows the logo of the U.S. Food and Drug Administration (FDA). On the left is the Department of Health and Human Services logo. To the right of that is the FDA logo, which is a blue square with the letters "FDA" in white. To the right of the blue square is the text "U.S. FOOD & DRUG ADMINISTRATION" in blue.

QT Medical Inc. Jui-Hung Hung Senior Quality Assurance Engineer 1370 Valley Vista Drive, Suite 266 Diamond Bar, California 91765

Re: K233521

Trade/Device Name: QT ECG (QTERD100) Regulation Number: 21 CFR 870.2920 Regulation Name: Telephone Electrocardiograph Transmitter And Receiver Regulatory Class: Class II Product Code: DXH, DRX Dated: November 1, 2023 Received: November 1, 2023

Dear Jui-Hung Hung:

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.

If your device is classified (see above) into either class II (Special Controls) or class III (PMA), it may be subject to additional controls. Existing major regulations affecting your device can be found in the Code of Federal Regulations, Title 21, Parts 800 to 898. In addition, FDA may publish further announcements concerning your device in the Federal Register.

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).

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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 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 approvals in the device master record (21 CFR 820.181).

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); 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-safety-reportingcombination-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.

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.

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,

Robert T. Kazmierski -S

for

Jennifer Shih Kozen Assistant Director Division of Cardiac Electrophysiology, Diagnostics, and Monitoring Devices Office of Cardiovascular Devices Office of Product Evaluation and Quality Center for Devices and Radiological Health

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Indications for Use

Submission Number (if known)

K233521

Device Name

QT ECG (QTERD100)

Indications for Use (Describe)

Type of Use (Select one or both, as applicable)

Prescription Use (Part 21 CFR 801 Subpart D)

Over-The-Counter Use (21 CFR 801 Subpart C)

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510(k) Summary

12. Type of Submission: Special 510(k), 510(k) number: K233521

12.1. Date of Summary:10/31/2023

12.2. Submitter: QT MEDICAL. Inc.

Address: 1370 Valley Vista Dr., Suite 266, Diamond Bar, CA 12.2.1. 91765, USA
12.2.2. Phone:1-(909) 323-0007
12.2.3. Fax:1-(310) 755-3108
12.2.4. Representative: Ruey-Kang Chang, CEO

(rk.chang@gtmedical.com)

12.3. Identification of the Device

12.3.1. Proprietary/ Trade name: QT ECG
12.3.2. Classification Product Code: DXH
12.3.3. Regulation Number: 870.2920
12.3.4. Regulation Description:Telephone electrocardiograph transmitter and receiver
12.3.5. Review Panel: Cardiovascular
12.3.6. Device Class: II

12.4. Identification of the predicate Device

12.4.1. Original Device Name: QT ECG
12.4.2. Manufacturer: QT Medical, Inc.
Classification Product Code: DXH 12.4.3.
Regulation number: 870.2920 12.4.4.
12.4.5. Device Class: II
510(k) Number: K220795 12.4.6.

12.5. Indication for Use of the Device

Indication for Use: 12.5.1.

The QT ECG System is intended to condition an electrocardiographic signal so that it can be transmitted digitally via Bluetooth technology and cell-phone or communication device to a remote location. The QT ECG System is designed to be used by an adult or a healthcare worker to transmit a 12-lead ECG and rhythm strip in near real-time to enable review at a physician's office, hospital or other medical receiving center.

Device Description 12.6.

The QT ECG system is a non-defibrillator-proof, hand-held, cordless 12-lead

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electrocardiograph (ECG) system with Bluetooth connectivity. The QT ECG system consists of 5 maior components:

· The QT ECG Recorder-Compact device that records 12-lead, resting electrocardiograms, then transmits the recorded data to a mobile device (smartphone, tablet, etc.) paired via Bluetooth. A Bluetooth-enabled mobile device (not included) is needed to operate the QT ECG Recorder, and to send the recorded rhythm strip to a cardiologist or licensed physician for review.
. The QT ECG Electrode Strip-Disposable, patented electrodes that are prepositioned on a self-adhesive strip.
. The QT ECG App - Software that lets the user uses their mobile device to operate the QT ECG recorder, then send the recorded data via cloud to a certified medical professional for review.
Analysis The analysis module provides ECG measurement from the . collected data. It does not make any interpretation of the intervals provided based on factors such as heart rate, QRS duration, etc.

Web Service - The web service provides an interface for communication. . The recorded ECG data is saved temporarily on the mobile device until it is transferred via the Internet to the cloud server. The QT ECG System does not have monitoring capabilities and does not have diagnostic alarm function. The QT ECG System is indicated for use on infants, children and adults. It is designed to be operated by adults in the home, or by healthcare workers in non-acute care clinical facilities (such as nursing homes, skilled nursing facilities), and in professional healthcare facilities (such as clinics, hospitals, and ambulances) to record and transmit a 12- lead ECG and rhythm strip in near real-time to enable review at a physician's office, hospital or other medical receiving centers.

12.7. Non-clinical Testing

An validation activity was conducted on the subject device according to IEC 60601-1-12 (EMS, Emergency Medical Services), QT ECG.

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The list of claimed standards and regulations for compliance:

Testing Item	FDA Recognition No.	Standards and Regulations Applied
	-	Good Laboratory Practice for Nonclinical Laboratory Studies. Title 21 ofthe U.S. Code of Federal Regulations,Part 58 United States Food and Drug Administration.
Biocompatibility	-	Use of International Standard ISO 10993-1, "Biological evaluation ofmedical devices - Part 1: Evaluation and testing within a riskmanagement process".
	2-222	ISO 10993-2:2006, Biological evaluation of medical devices -- Part 2:Animal welfare requirements.
	2-245	ISO 10993-5:2009, Biological evaluation of medical devices -- Part 5:Tests for in vitro cytotoxicity.
	2-174	ISO 10993-10:2010, Biological evaluation of medical devices -- Part 10:Tests for irritation and skin sensitization.
	2-191	ISO 10993-12:2012, Biological evaluation of medical devices -- Part 12:Sample preparation and reference materials.
	2-191	ANSI/AAMI/ISO 10993-12:2012, Biological Evaluation Of MedicalDevices - Part 12: Sample PreparationAnd Reference Materials.
	-	Guidance for the Content of Premarket Submissions for SoftwareContained in Medical Devices: 2005.
Software Validation andCybersecurity Evaluation	-	Guidance on Off-The-Shelf Software Use in Medical Devices: 2019.
	-	Guidance for content of Premarket Submissions for Management ofCybersecurity in Medical Devices: 2014.
ElectromagneticCompatibilityand ElectricalSafety	13-79	IEC 62304:2006+AMD1:2015, Medical device software - Software lifecycle processes.
	5-125	ISO 14971:2019, Medical devices - Application of risk management tomedical devices.
	3-105	ANSI/AAMI/IEC 60601-2-25:2011/(R)2016, Medical electrical equipment -Part 2-25: Particular requirementsfor the basic safety and essential performance of electrocardiographs.
	-	Guidance on Information to Support a Claim of ElectromagneticCompatibility (EMC) of Electrically-Powered Medical Devices: 2016.
	19-4	ANSI/AAMI ES60601-1: 2005 / A2:2010, Medical electrical equipment -Part 1: General requirements for basic safety and essential performance.
	19-8	IEC 60601-1-2:2014, Medical electrical equipment - Part 1-2: Generalrequirements for basic safety and essential performance - Collateralstandard: Electromagnetic compatibility.
	19-14	IEC 60601-1-11:2015, Medical electrical equipment - Part 1-11: Generalrequirements for basic safety andessential performance - Collateral standard: Requirements for medicalelectrical equipment and medicalelectrical systems used in the home healthcare environment.
	3-105	IEC 60601-2-25:2011, Medical electrical equipment - Part 2-25: Particularrequirements for the basic safety and essential performance ofelectrocardiographs.
	19-13	IEC 62133:2012, Secondary cells and batteries containing alkaline orother non-acid electrolytes - Safetyrequirements for portable sealed secondary cells, and for batteries madefrom them, for use in portableapplications.
Performance	3-52	ANSI/AAMI EC12:2000/(R)2015, Disposable ECG electrodes.
Performance	19-13	IEC 62133:2012, Secondary cells and batteries containing alkaline orother non-acid electrolytes - Safety requirements for portable sealedsecondary cells, and for batteries made from them, for use in portableapplications.
Performance	19-39	IEC 60601-1-12:2014, AMD1:2020 (excepted for clause 9)
Human Factor	-	Guidance on Applying Human Factors and Usability Engineering toMedical Devices: 2016.

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12.8. Description of the change(s) and unchange(s)

The QT ECG submitted in this 510(k) file is compared with the cleared device, former QT ECG (K220795). Differences between the devices are cited as below, and other technological specifications are all the same as that of K220795. The new use environment is EMS, so the risk management and verification activities in our design and development control process are all completed.

All Differences between Subject Device and Original Device

Device Change	Risk	Subject Device(K233521)	Original Device (K220795)	Verification/ ValidationMethod(s)	Acceptance Criteria	Summary of Results
Indications for Use	The recorder maybe used in EMS(EmergencyMedical Services),it may malfunction.	The QT ECG System is intended toacquire, record and process anelectrocardiographic signal so that itcan be transmitted digitally viaBluetooth technology to a cell-phone ormobile device, then to a remotelocation. The QT ECG System isindicated for use on infants, childrenand adults. It is designed to beoperated by adults in the home, or byhealthcare workers in non-acute careclinical facilities (such as nursinghomes, skilled nursing facilities), and inprofessional healthcare facilities (such	The QT ECG System is intendedto acquire, record and processan electrocardiographic signal sothat it can be transmitted digitallyvia Bluetooth technology to acell-phone or mobile device,then to a remote location. TheQT ECG System is indicated foruse on infants, children andadults. It is designed to beoperated by adults in the home,or by healthcare workers innon-acute care clinical facilities(such as nursing homes, skillednursing facilities), to record andtransmit a 12-lead ECG andrhythm strip in near real-time to	Undergo the test accordingto IEC 60601-1-12.	Pass the test according toIEC 60601-1-12.	Pass.The risk is controlled.The document:Risk Management PlanRisk Control ReportRisk Management SummaryReport of IEC 60601-1-12

Storage andtransporttemperature		as clinics, hospitals, and ambulances)to record and transmit a 12- lead ECGand rhythm strip in near real-time toenable review at a physician's office,hospital or other medical receivingcenters.	enable review at a physician'soffice, hospital or other medicalreceiving centers.
Storage andtransporttemperature		-40°C ~ 70°C; -40°F~158°F	-25°C~~70°C; -13°F~~158°F
OperatingTemperature		-40°C ~ 70°C; -40°F~158°F	-25°C~~70°C; -13°F~~158°F
Storage andTransportAtmosphericPressure		620 hPa ~ 1060 hPa	700 hPa ~ 1060 hPa
OperatingAtmosphericPressure		620 hPa ~ 1060 hPa	700 hPa ~ 1060 hPa
Ingress ProtectionRating		IP33	IP22
Package	-	Package (Remove Small White Box):Small Blue Box, Industrial Package.	Package:Small White Box, Small Bluebox, Industrial Package.	It's no need to conductVerification/ ValidationMethod(s) because thesmall white box is no longerin use.	N/A	N/A
Quick guide		Simplify the quickguide for reducingrisks and there isno other risk.	Update the quick guide to02-C1-07-V3-R0-01 Quick Guide)	Quick guide (02-C1-07-V2-R4)	It's no need to conductVerification/ ValidationMethod(s) because thequick guide is for reducingrisks and there is no otherrisk.	N/A	N/A

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Mobile device	New mobilesystem version isnot supported.	On Phone:iPhone 13 Pro Max (iOS 15)iPhone 13 Pro (iOS 15)iPhone 13 (iOS 15)iPhone 13 mini (iOS 15)iPhone 12 Pro Max (iOS 15)iPhone 12 Pro (iOS 15)iPhone 12 (iOS 15)iPhone 12 mini (iOS 15)iPhone 11 Pro Max (iOS 15)iPhone 11 Pro (iOS 15)iPhone 11 (iOS 15)iPhone XS Max (iOS 15)iPhone XS (iOS 15)iPhone XR (iOS 15)iPhone X (iOS 15)iPhone 8/ 8 Plus (iOS 15)iPhone 7/ 7 Plus (iOS 15)iPhone 6S/ 6S Plus (iOS 15)iPhone SE 2 (iOS 15)Samsung Galaxy S10 (Android 11)Samsung Galaxy S9 (Android 10)Samsung Galaxy S9+ (Android 10)Samsung Galaxy S8 (Android 9)Samsung Galaxy S8+ (Android 9)Samsung Galaxy A21s (Android11)Samsung Galaxy A20 (Android 11)LG G7 (Android 9)LG G6 (Android 9)Google Pixel 2 (Android 11)Google Pixel 2 XL (Android 11)Google Pixel (Android 10)Google Pixel XL (Android 10)On Tablet:iPad Pro 11 inch/2020 (iOS 15)iPad Pro 11 inch/2018 (iOS 15)iPad 9th/2021 (iOS 15)iPad 8th/2020 (iOS 15)iPad 7th/2019 (iOS 15)iPad 6th/2018 (iOS 15)iPad 5th/2017 (iOS 15)iPad mini 6 (iOS 15)iPad mini 5 (iOS 15)iPad mini 4 (iOS 15)iPad Air 2 (iOS 15)	on Phone:iPhone 11 Pro Max (iOS 13.5)iPhone 11 Pro (iOS 13.5)iPhone 11 (iOS 13.5)iPhone XS Max (iOS 13.5)iPhone XS (iOS 13.5)iPhone XR (iOS 13.5)iPhone X (iOS 13.5)iPhone 8/ 8 Plus (iOS 13.5)iPhone 7/ 7 Plus (iOS 13.5)iPhone 6S/ 6S Plus (iOS 13.5)iPhone 6/ 6 Plus (iOS 12.4.7)iPhone SE (iOS 13.5)iPhone SE 2 (iOS 13.5)iPod touch (6th) (iOS 12.4.7)Samsung Galaxy S9 (Android 9)Samsung Galaxy S9+ (Android9)Samsung Galaxy S8 (Android 9)Samsung Galaxy S8+ (Android9)LG G7 (Android 8.0.0)LG G6 (Android 8.0.0)LG G5 (Android 8.0.0)Google Pixel 2 (Android 10)Google Pixel 2 XL (Android 10)Google Pixel (Android 10)Google Pixel XL (Android 10)on Tablet:iPad 7th/2019 (iOS 13.5)iPad 6th/2018 (iOS 13.5)iPad 5th/2017 (iOS 13.5)iPad mini 5 (iOS 13.5)iPad mini 4 (iOS 13.5)iPad mini 3 (iOS 12.4.7)	Conduct the softwaresystem test.	Pass criteria according totest reports:Unit TestIntegration TestSystem Test	Pass. The risk is controlledThe document:Risk_Management_PlanRisk_Control_ReportRisk_Management_SummarySoftware Test reports:Unit TestIntegration TestSystem Test

iPad Air 4 (iOS 15)Samsung Tab S4 (Android 10)Samsung Tab S3 (Android 10)Samsung Tab A 10.1" 2019(Android 11)Samsung Tab A7 (Android 11)Lenovo Tab 4 8 Plus (Android8.1.0)Asus Zenpad 3s 10 (Android 7.0)Asus Zenpad 3 8.0 (Android 7.0)

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12.9. Similarity and Difference

The QT ECG has been compared with the former "QT ECG" (K220795). The subject device has similar indications for use, same technology/mechanism of action, and similar safety and performance as the original device. The usage ny Medical Services (EMS) in the objective device, which operates during emergency situations in compliance with IEC 60601-1-12.

Although there are some different specifications between two devices, the software validation, performance test and usability test have been completed to demonstrate that the differences between these parameters would not impact the subject device. The subject device has also undergone all safety and performance tests, and the results complied with the test requests.

Therefore, the difference between the subject device did not raise any problem of substantial equivalence. The subject device is substantially equivalent to the original device in intended use, safety and performance claims.

12.10. Conclusion

After analyzing all testing data and comparing with the original device, it can be concluded that the QT ECG is substantially equivalent to the original device.

Regulation Number and Section

§ 870.2920 Telephone electrocardiograph transmitter and receiver.

(a)
Identification. A telephone electrocardiograph transmitter and receiver is a device used to condition an electrocardiograph signal so that it can be transmitted via a telephone line to another location. This device also includes a receiver that reconditions the received signal into its original format so that it can be displayed. The device includes devices used to transmit and receive pacemaker signals.(b)
Classification. Class II (performance standards).