Electronic Stethoscope

K191667 · Hefei Mintti Medical Technology Co., Ltd. China · DQD · Dec 18, 2019 · Cardiovascular

Device Facts

• Record ID: K191667
• Device Name: Electronic Stethoscope
• Applicant: Hefei Mintti Medical Technology Co., Ltd. China
• Product Code: DQD · Cardiovascular
• Decision Date: Dec 18, 2019
• Decision: SESE
• Submission Type: Traditional
• Regulation: 21 CFR 870.1875
• Device Class: Class 2

Intended Use

The Electronic Stethoscope is intended for the detection and amplification of sounds from the heart, lungs and other internal organs with the use of a selective frequency. It can be used on any person undergoing a physical assessment for medical diagnostic purposes only.

Device Story

Electronic stethoscope (smartho-D2) captures acoustic signals from heart, lungs, and internal organs (10-2000Hz range). Device uses digital signal processor to amplify and filter signals; output transmitted to user via wired headset. Operated by clinicians during physical assessments. Features 1.3-inch OLED display, 5-button keypad, and Bluetooth connectivity. Powered by 3.7V/2000mAh rechargeable lithium-ion battery. Provides up to 100X amplification. Device aids clinical decision-making by enhancing auscultation sounds for diagnostic purposes.

Clinical Evidence

No clinical data. Bench testing only. Performance verified via electrical safety (IEC 60601-1), EMC (IEC 60601-1-2), home healthcare environment standards (IEC 60601-1-11), biocompatibility (ISO 10993-1), and wireless coexistence testing.

Technological Characteristics

Electronic stethoscope with digital signal processor. Frequency response 10-2000Hz. 1.3-inch OLED display. Wired headset output. Bluetooth 2.4 GHz connectivity. Powered by 3.7V/2000mAh Li-ion battery. Biocompatibility per ISO 10993-1. Electrical safety per IEC 60601-1, IEC 60601-1-11, and IEC 60601-1-2.

Indications for Use

Indicated for any person undergoing a physical assessment for medical diagnostic purposes, specifically for the detection and amplification of heart, lung, and internal organ sounds.

Regulatory Classification

Identification

Manual stethoscope: A mechanical device used to project the sounds associated with the heart, arteries, and veins and other internal organs. Electronic stethoscope: An electrically amplified device used to project the sounds associated with the heart, arteries, and veins and other internal organs.

Special Controls

*Classification.* Class II (special controls). The device, when it is a lung sound monitor, is exempt from the premarket notification procedures in subpart E of part 807 of this chapter subject to the limitations in § 870.9.

Predicate Devices

• 3M™ Littmann® Electronic Stethoscope Model 3200 (K083903)

Submission Summary (Full Text)

{0}------------------------------------------------

Image /page/0/Picture/0 description: The image shows the logo of the U.S. Food and Drug Administration (FDA). The logo consists of two parts: the Department of Health & Human Services logo on the left and the FDA logo on the right. The FDA logo is in blue and includes the letters "FDA" followed by the words "U.S. Food & Drug Administration".

December 18, 2019

Hefei Mintti Medical Technology Co., Ltd. China Shengsheng Cai, General Manager C309, National University Science Park, 602 Huangshan Road, High-tech Zone, Hefei, 230088, CHINA

Re: K191667

Trade/Device Name: Electronic Stethoscope - smartho-D2 Regulation Number: 21 CFR 870.1875 Regulation Name: Stethoscope Regulatory Class: Class II Product Code: DOD Dated: November 20, 2019 Received: November 26, 2019

Dear Shengsheng Cai:

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 (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 located 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.

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 803) for

{1}------------------------------------------------

devices or postmarketing safety reporting (21 CFR 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 (OS) regulation (21 CFR Part 820) for devices or current good manufacturing practices (21 CFR 4, Subpart A) for combination products; and, if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR 1000-1050.

Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21 CFR Part 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 medical devices and radiation-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 ([e-mail]) or phone [phone] or 301-796-7100).

Sincerely.

Stephen Browning 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

Enclosure

{2}------------------------------------------------

## Indications for Use

510(k) Number (if known) K191667

Device Name Electronic Stethoscope - smartho-D2

Indications for Use (Describe)

The Electronic Stethoscope is intended for the detection and amplification of sounds from the heart, lungs and other internal organs with the use of a selective frequency. It can be used on any person undergoing a physical assessment for medical diagnostic purposes only.

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

| <span style="font-family: DejaVu Sans, sans-serif">☑</span> Prescription Use (Part 21 CFR 801 Subpart D) | <span style="font-family: DejaVu Sans, sans-serif">☐</span> Over-The-Counter Use (21 CFR 801 Subpart C) |
|----------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------|
|----------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------|

#### CONTINUE ON A SEPARATE PAGE IF NEEDED.

This section applies only to requirements of the Paperwork Reduction Act of 1995.

#### *DO NOT SEND YOUR COMPLETED FORM TO THE PRA STAFF EMAIL ADDRESS BELOW.*

The burden time for this collection of information is estimated to average 79 hours per response, including the time to review instructions, search existing data sources, gather and maintain the data needed and complete and review the collection of information. Send comments regarding this burden estimate or any other aspect of this information collection, including suggestions for reducing this burden, to:

> Department of Health and Human Services Food and Drug Administration Office of Chief Information Officer Paperwork Reduction Act (PRA) Staff [e-mail]

"An agency may not conduct or sponsor, and a person is not required to respond to, a collection of information unless it displays a currently valid OMB number."

{3}------------------------------------------------

# 510(k) Summary

# Prepared in accordance with the requirements of 21 CFR Part 807.92

| 1. Submitter: | Hefei Mintti Medical Technology Co., Ltd. China<br>C309, National University Science Park, 602Huangshan Road, High-tech Zone<br>Hefei City, Anhui Province, 230088, China<br>Tel.: [phone] |
|------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Contact<br>Person: | Shengsheng Cai |
| Prepare date: | December 16, 2019 |
| 2. Device name<br>and<br>classification: | Device Name: Electronic Stethoscope<br>Models: smartho-D2<br>Classification Name:<br>21 CFR 870.1875 Stethoscope, Electronic<br>Product code: DQD<br>Regulatory Class: Class II |
| 3. Reason for<br>Submission | New Application. |
| 4. Predicate<br>Device(s): | 3M Health Care, 3M™ Littmann® Electronic Stethoscope Model 3200 cleared under<br>K083903 |
| 5. Device<br>Description: | The Mintti Electronic Stethoscope, model smartho-D2 is a healthcare device that<br>picks up sounds of the heart, lungs and other internal organs with the use of<br>selective frequency ranges from 10-2000Hz. After amplification and filtering, the<br>sounds are transferred to the user's ears via an wired-connected headset.<br><br>The user interface includes a 5-button keypad and an 1.3' OLED display with a blue<br>back-light. Sound processing is carried out with the aid of a digital signal processor.<br><br>The smartho-D2 does not incorporate any off-the-shelf (OTS) software, and it<br>incorporates embedded software which controls all the features of the product,<br>including sound capture, digital signal processing, volume control, OLED display<br>and Bluetooth function.<br><br>The smartho-D2 operates on a certificated rechargeable 3.7V/2000mAh lithium ion<br>battery. |
| 6. Indications<br>for Use: | The Electronic Stethoscope is intended for the detection and amplification of<br>sounds from the heart, lungs and other internal organs with the use of a selective<br>frequency. It can be used on any person undergoing a physical assessment for<br>medical diagnostic purposes only. |

{4}------------------------------------------------

# 7. Predicate Device Comparison

In comparison to the predicate device, the subject device has the same intended use, similar product design, and performance safety as the predicate device.

Please refer to the following table that notes differences between the subject device and predicate device. All the differences do not affect the basic design principle, usage, effectiveness and safety of the subject device. No new questions are raised regarding effectiveness and safety.

| ITEM | Proposed Device | Predicate Device | Comment |
|-------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----------|
| | smartho-D2 | 3M™ LITTMANN®<br>ELECTRONIC<br>STETHOSCOPE<br>MODEL 3200 | |
| Regulatory | | | |
| Classification | Stethoscope, Electronic | Stethoscope, Electronic | Same |
| Regulation | Class II, 21 CFR 870.1875 | Class II, 21 CFR 870.1875 | Same |
| Product code | DQD | DQD | Same |
| Indications for Use | | | |
| Indications for<br>Use | The Electronic Stethoscope is<br>intended for the detection and<br>amplification of sounds from<br>the heart, lungs, and other<br>internal organs with the use<br>of a selective frequency. It<br>can be used on any person<br>undergoing a physical<br>assessment for medical<br>diagnostic purposes only. | 3M™ LITTMANN®<br>ELECTRONIC<br>STETHOSCOPE MODEL<br>3200 is intended for medical<br>diagnostic purposes only. It<br>may be used for the detection<br>and amplification of sounds<br>from the<br>heart, lungs, arteries, veins,<br>and<br>other internal organs with the<br>use of selective frequency<br>ranges.It can be used on any<br>person undergoing a physical<br>assessment. | Different |
| Contraindications | None | None | Same |
| Power Supply | | | |
| Source Type | Battery | Battery | Same |
| Battery Type | A rechargeable<br>3.7V/2000mAh lithium ion<br>battery | One AA alkaline, lithium, or<br>NiMH battery(rechargeable). | Different |
| Battery<br>Operation Time | 48 Hours | 50-60 Hours | |
| Technical Specifications | | | |
| Binaural<br>headset | YES | YES | Same |
| Chest-piece | YES | YES | Same |
| Sound | Digital signal processor | Digital signal processor | Same |
| processing | | | |
| Display Screen | 1.3' Color OLED | LCD | Different |
| Low Battery Indicator | YES | YES | Same |
| Automatic Power Off | No | YES | Different |
| Volume Control | 1-4 level | 1-9 level | |
| Sound Amplifier | Amplifies up to 100X | Amplifies up to 24X | Different |
| Signal Sampling Rate | 8 kHz | 4 kHz | Different |
| Frequency Response | 20 -2000Hz<br>Heart Sound Mode:20-500Hz<br>Lung Sound Mode:<br>200-2000Hz | Bell (20-1000 Hz)<br>Diaphragm (20-2000 Hz)<br>"Extended Range” (50-500 Hz) | Different |
| Intuitive keypad | NO | No | Same |
| A/P Chest key | No | No | Same |
| Direct Listening | Only transferred via headset | Littmann® Model 3200 allows<br>direct listening to sounds in<br>real time through the device's<br>attached binaurals. | Different |
| Recording and Playback | Not on the device itself | Yes - stores twelve (12) 30<br>second tracks on device | Different |
| Wireless Technology | Yes-uses Bluetooth® at 2.4 GHz | Yes-uses Bluetooth® at 2.4 GHz | Same |
| Ambient & Frictional Noise Reduction Technology | YES | YES | Same |

Table 1 Specific Comparison to Predicate

{5}------------------------------------------------

As seen in the comparison tables, the subject and predicate devices have similar design features and performance specifications. The differences between the subject and predicate devices do not raise different questions of safety or effectiveness. Moreover, as demonstrated in the bench testing, the different indications and technological characteristics do not affect the safety and effectiveness of the smartho-D2 Electronic Stethoscope.

## 8. Performance Testing:

Performance data includes "Non-Clinical Data" and "Clinical Data". Summary of the data provided is below:

#### Non-Clinical Data:

The following performance data were provided in support of the substantial equivalence determination.

#### Biocompatibility testing

The biocompatibility evaluation for the smartho-D2 Electronic Stethoscope was conducted in accordance with the International Standard ISO 10993-1 "Biological Evaluation of Medical Devices - Part 1: Evaluation and Testing Within a Risk Management Process," as recognized by FDA. The worst case of the whole system is considered tissue-contacting for a duration of less than 24 hours. And Cytotoxicity, Skin Sensitization and Skin Irritation tests were conducted.

{6}------------------------------------------------

## Reprocessing: Cleaning and Disinfection

The sterilization and shelf life information provided are acceptable because the subject devices are non-sterile devices. The validation testing results for cleaning and disinfection of the subject devices are adequate and acceptable.

#### Electrical safety and electromagnetic compatibility (EMC)

Electrical safety and EMC testing were conducted on the smartho-D2 Electronic Stethoscope device, consisting of all the modules and accessories in the system complies with IEC 60601-1:2012 Medical electrical equipment Part 1: General requirements for basic safety and essential performance for safety, IEC 60601-1-11: 2010 MEDICAL ELECTRICAL EQUIPMENT –Part 1-11: General requirements for basic safety and essential performance -Collateral Standard: Requirements for medical electrical equipment and medical electrical systems used in the home healthcare environment, and the IEC 60601-1-2: 2014 Medical electrical equipment -Part 1-2: General requirements for basic safety and essential performance - Collateral Standard: Electromagnetic disturbances - Requirements and tests standard for EMC.

#### Bench Testing

Bench testing was conducted on the smartho-D2 Electronic Stethoscope device, consisting of all the accessories in the system, which demonstrates that the smartho-D2 can perform over its intended range of operation (10-2000Hz). Comparative performance testing submitted in the 510(k) demonstrated the two devices perform in a substantially equivalent manner.

#### Software Verification and Validation Testing

Software documentation including verification & validation was provided in accordance with FDA Guidance: Guidance for the Content of Premarket Submissions for Software in Medical Devices for software with a moderate level of concern.

#### Risk Analvsis

A risk analysis was conducted in accordance with ISO 14971: 2007 - Medical devices -Application of risk management to medical devices.

#### Wireless Function Testing

The wireless coexistence test is conducted per the FDA Guidance Radio Frequency Wireless Technology in Medical Devices dated on August 14, 2013 to demonstrate no effect on the safe and effective use of the device.

#### Clinical data:

No animal or clinical testing was submitted in this 510(k).

## 9. Substantial Equivalence Conclusion:

Differences between the indications for use and technological characteristics of the subject device compared to the predicate do not raise different questions of safety and effectiveness. The performance of the device is supported by performance testing, and risk management activities. The Mintti smartho-D2 Electronic Stethoscope is Substantially Equivalent (SE) to the 3M "" Littmann® Electronic Stethoscope Model 3200 cleared by K083903.