eMurmur ID

K181988 · Csd Labs GmbH · DQD · Apr 17, 2019 · Cardiovascular

Device Facts

• Record ID: K181988
• Device Name: eMurmur ID
• Applicant: Csd Labs GmbH
• Product Code: DQD · Cardiovascular
• Decision Date: Apr 17, 2019
• Decision: SESE
• Submission Type: Traditional
• Regulation: 21 CFR 870.1875
• Device Class: Class 2
• Attributes: AI/ML, Software as a Medical Device, Pediatric

AI Performance

Output	Acceptance	Observed	Dev DS	Test DS
Pathological Heart Murmur Detection	Sensitivity and specificity not worse than that of the predicate device (SensiCardiac).	Sensitivity: 85.0% (95% CI: 72.9%-92.5%); Specificity: 86.7% (95% CI: 74.9%-93.7%); Accuracy: 85.8% (95% CI: 78.0%-91.3%)	Not specified.	Pivotal clinical study: 120 subjects across all ages, with 50% confirmed pathological murmur (class I) and 50% confirmed innocent or no murmur (class III).

Intended Use

The eMurmur ID software system is a decision support device for the healthcare provider (the user) in the evaluation of patient heart sounds. eMurmur ID is used to record, display, analyze, and store the acoustic signal of the heart, recorded by means of an electronic stethoscope. The automated analysis will identify specific heart sounds that may be present, including S1, S2, physiological heart murmurs, pathological heart murmurs and absence of a heart murmur. eMurmur ID is indicated for use in a setting where auscultation would typically be performed by a healthcare provider. It is not intended as a sole means of diagnosis. The heart sound interpretations offered by eMurmur ID are only significant when considered in conjunction with healthcare provider over-read and including all other relevant patient data.

Device Story

eMurmur ID is a software-based decision support system for heart sound evaluation. It utilizes a 20-second digital heart sound recording captured via an off-the-shelf electronic stethoscope (Littmann 3200). Data is transmitted via Bluetooth to a mobile app, then uploaded to a secure backend server for automated analysis. The system identifies S1, S2, and presence/type of heart murmurs. Results are returned to the mobile app for display alongside visual/acoustic playback. Used by healthcare providers in clinical settings, the device provides decision support; clinicians must perform an over-read and integrate findings with other patient data. Benefits include assisting in the identification of pathological murmurs, potentially improving diagnostic accuracy during routine auscultation.

Clinical Evidence

Prospective clinical study of 120 subjects (all ages, 50% pathological/50% innocent or no murmur). Compared eMurmur ID to SensiCardiac (K121617) using expert auscultation verified by echocardiography as ground truth. eMurmur ID sensitivity: 85.0% (95% CI: 72.9%-92.5%); specificity: 86.7% (95% CI: 74.9%-93.7%); accuracy: 85.8% (95% CI: 78.0%-91.3%). eMurmur ID demonstrated statistically significant improvement over the reference device (p<0.002 for all metrics). Bench testing, EMC, electrical safety, and wireless coexistence testing also performed.

Technological Characteristics

Software system comprising mobile app, web portal, and backend server. Uses off-the-shelf Littmann 3200 electronic stethoscope for acoustic signal acquisition. Connectivity via Bluetooth and secure internet (REST/JSON API). Data encrypted at rest and in transit. Backend hosts heart sound analysis algorithm and database. No PHI stored on user devices.

Indications for Use

Indicated for healthcare providers performing auscultation to evaluate heart sounds in patients of all ages. Used to identify S1, S2, physiological murmurs, pathological murmurs, or absence of murmurs. Not for sole diagnosis; requires provider over-read.

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

• SensiCardiac Mobi (K131044)

Reference Devices

• SensiCardiac (K121617)
• Littmann 3200 (K083903)

Submission Summary (Full Text)

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April 17, 2019

CSD Labs GmbH % Yarmela Pavlovic Partner Hogan Lovells US LLP 3 Embarcadero Center San Francisco, California 94501

# Re: K181988

Trade/Device Name: eMurmur ID Regulation Number: 21 CFR 870.1875 Regulation Name: Stethoscope Regulatory Class: Class II Product Code: DOD, DOC Dated: March 19, 2019 Received: March 19, 2019

# Dear Yarmela Pavlovic:

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

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801); medical device reporting of medical device-related adverse events) (21 CFR 803) for devices or postmarketing safety reporting (21 CFR 4, Subpart B) for combination products (see https://www.fda.gov/CombinationProducts/GuidanceRegulatoryInformation/ucm597488.htm); 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 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 http://www.fda.gov/MedicalDevices/Safety/ReportaProblem/default.htm.

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/DeviceRegulationandGuidance/) and CDRH Learn (http://www.fda.gov/Training/CDRHLearn). 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 (http://www.fda.gov/DICE) for more information or contact DICE by email ([e-mail]) or phone [phone] or 301-796-7100).

Sincerely.

# Stephen C. Browning -S5

for

Bram D. Zuckerman, M.D. Director Division of Cardiovascular Devices Office of Device Evaluation Center for Devices and Radiological Health

Enclosure

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# Indications for Use

510(k) Number (if known) K181988

Device Name eMurmur ID

#### Indications for Use (Describe)

The eMurmur ID software system is a decision support device for the user) in the evaluation of patient heart sounds. eMurmur ID is used to record, display, and store the acoustic signal of the heart, recorded by means of an electronic stethoscope. The automated analysis will identify specific heart sounds that may be present, including S1, S2, physiological heart murmurs, pathological heart murmurs and absence of a heart murmur.

eMurmur ID is indicated for use in a setting where auscultation would typically be performed by a healthcare provider. It is not intended as a sole means of diagnosis. The heart sound interpretations offered by eMurmur ID are only significant when considered in conjunction with healthcare provider over-read and including all other relevant patient data.

**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

## CSD Labs' eMurmur ID (K181988)

#### SPONSOR

Company name: CSD Labs GmbH Company address: Nikolaiplatz 4 8020 Graz Austria Contact Person: Andreas Reinisch Date Prepared: March 19, 2019

#### DEVICE

Trade Name: eMurmur ID Computer Aided Auscultation, Heart Sounds Analyzer Common or usual name: Classification name: Electronic Stethoscope; Phonocardiograph; Requlation number: 21 CFR 870.1875, 870.2390 Product code: DQD, DQC Device class: Class II Reviewing panel: Cardiology PREDICATE DEVICE

| Company | Product | 510(k) |
|----------------------------|-------------------|-----------------------------|
| Diacoustic Medical Devices | SensiCardiac Mobi | K131044 (Primary Predicate) |
| Discoustic Medical Devices | SensiCardiac | K121617 (Reference Device) |

#### INDICATIONS FOR USE

The eMurmur ID software system is a decision support device for the healthcare provider (the user) in the evaluation of patient heart sounds. eMurmur ID is used to record, display, analyze, and store the acoustic signal of the heart, recorded by means of an electronic stethoscope. The automated analysis will identify specific heart sounds that may be present, including S1, S2, physiological heart murmurs, pathological heart murmurs and absence of a heart murmur.

eMurmur ID is indicated for use in a setting where auscultation would typically be performed by a healthcare provider. It is not intended as a sole means of diagnosis. The heart sound interpretations offered by eMurmur ID are only significant when considered in conjunction with healthcare provider over-read and including all other relevant patient data.

#### DEVICE DESCRIPTION

eMurmur ID is a software system comprised of the following components:

- 1. The eMurmur ID Backend, running on a server environment, hosts the eMurmur ID Heart Sound Analysis Algorithm, an encrypted database for archiving patient and user information, and an application programming interface (API) for communication with the web portal and mobile application.

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- 2. The eMurmur ID Mobile App, which runs on a mobile device. The app permits the following activities:
- a. Electronic recording of heart sound signals via a compatible electronic stethoscope, the Littmann 3200
- b. Visual and acoustic playback of heart and lung sounds
- Capturing patient information C.
- d. Transferring data to and from the eMurmur ID backend through a secure connection
- Displaying heart sound analysis results e.
- 3. The eMurmur ID Web Portal, which provides the following functionalities:
- a. Capturing and editing patient information
- Displaying and editing patient encounters including heart sound analysis results b.
- C. Visual and acoustic playback of heart and lung sounds
- d. Downloading reports (PDF) and heart and lung sound recordings
- Transferring data to and from the eMurmur ID backend through a secure connection e.

The acquisition of the acoustic data is carried out by the FDA-cleared off-the-shelf electronic stethoscope Littmann 3200 by 3M (MN, USA) (K083903).

For heart sounds to be analyzed by the heart sound analysis algorithm, a 20 second digital recording of the patient's heart sounds and the patient's date of birth are required. Heart sounds are recorded using the compatible, FDA-cleared, off-the-shelf electronic stethoscope Littmann 3200. The heart sounds are transmitted via Bluetooth to a mobile device running the eMurmur ID mobile app. The app then stores and sends the recorded data to the eMurmur ID backend for analysis. The results of the heart sound analysis are returned to the app within a few seconds, where they are displayed to the user together with the heart sound recording. The user can utilize the heart sound analysis results and the acoustic and visual representation of the heart sound recordings as decision support data in their decision-making process regarding the presence and type of a heart murmur.

# TECHNOLOGICAL CHARACTERISTICS

eMurmur ID has technological characteristics that are comparable to the predicate and reference devices:

- 1. Each of the systems host a heart sound analysis algorithm, a web API and a database on a backend server.
- 2. Each of the systems provide the user with a mobile app, which is used to record heart sounds and patient information. The mobile app transfers the data to the backend through a secure connection and displays the analysis results to the user.
- 3. Each of the systems require an FDA-cleared off-the-shelf electronic stethoscope for the acquisition of the heart sounds.
- 4. Each of the devices provide similar heart sound analysis output and similar additional supporting information to the user.

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| | eMurmur ID (K181988) | SensiCardiac Mobi (K131044)<br>(Primary Predicate) | SensiCardiac (K121617)<br>(Reference Device) |
|------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Intended Use /<br>Indications for<br>Use | The eMurmur ID software system is a<br>decision support device for the<br>healthcare provider (the user) in the<br>evaluation of patient heart sounds.<br>eMurmur ID is used to record, display,<br>analyze, and store the acoustic signal<br>of the heart, recorded by means of an<br>electronic stethoscope. The automated<br>analysis will identify specific heart<br>sounds that may be present, including<br>S1, S2, physiological heart murmurs,<br>pathological heart murmurs and<br>absence of a heart murmur.<br><br>eMurmur ID is indicated for use in a<br>setting where auscultation would<br>typically be performed by a healthcare<br>provider. It is not intended as a sole<br>means of diagnosis. The heart sound<br>interpretations offered by eMurmur ID<br>are only significant when considered in<br>conjunction with healthcare provider<br>over-read and including all other<br>relevant patient data. | The SensiCardiac Mobi Diagnostic is an<br>electronic auscultatory device, intended<br>to provide support to the physician in the<br>evaluation of patients' heart sounds.<br><br>The product acquires and records the<br>acoustic signals of the heart and<br>analyzes these signals. The analysis<br>procedure will identify specific heart<br>sounds that may be present. Identified<br>sounds include S1, S2, and suspected<br>murmurs. The device is indicated for use<br>in a clinical setting, by a physician or by<br>trained personnel who are acting on the<br>order of a licensed physician. It is not<br>intended as a sole means of diagnosis.<br><br>The interpretation of heart sounds offered<br>by the SensiCardiac Mobi are only<br>significant when used in conjunction with<br>physician over-read as well as<br>consideration of all other relevant patient<br>data. | Sensi is a decision support software<br>package intended to assist medical<br>examiners in heart auscultation.<br><br>The Sensi Diagnostic Heart Murmur<br>Software distinguishes between<br>normal/physiological and<br>pathological heart murmurs by<br>analyzing the acoustic heart signals<br>captured with an electronic<br>stethoscope. The device will record<br>the acoustic sound of the heart at the<br>four main auscultation positions. The<br>acoustic heart signal is analyzed to<br>identify heart sounds that may be<br>present, identified sounds include<br>S1, S2 and suspected murmurs. |
| User Population | Healthcare provider licensed or<br>authorized to perform auscultation | Healthcare provider licensed or<br>authorized to perform auscultation | Healthcare provider licensed or<br>authorized to perform auscultation |
| Acquires and<br>Records Heart<br>Sounds | Yes – acoustic signal of heart by<br>means of electronic stethoscope and<br>mobile app | Yes – acoustic signal of heart by means<br>of electronic stethoscope and mobile app | Yes – acoustic signal of heart by<br>means of electronic stethoscope and<br>Windows desktop app |
| Analyzes Heart<br>Sounds | Yes – distinguishes between<br>normal/physiological and pathological<br>heart murmurs | Yes - distinguishes between<br>normal/physiological and pathological<br>heart murmurs | Yes - distinguishes between<br>normal/physiological and<br>pathological heart murmurs |

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| Y |
|------|
| 1819 |
| 88 |

| | eMurmur ID (K181988) | SensiCardiac Mobi (K131044)<br>(Primary Predicate) | SensiCardiac (K121617)<br>(Reference Device) |
|-----------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| User Interface | Android app for recording heart<br>sounds, sending analysis requests and<br>receiving analysis results. Web portal<br>for reviewing and editing user and<br>patient data, OS independent. | Recording and analysis are conducted on<br>an iOS mobile app, which is also used for<br>reviewing auscultations. | Recording and analysis are<br>conducted on a Windows desktop<br>app, which is also used for reviewing<br>auscultations. |
| Backend | Server analyzes (algorithm) and stores<br>(database) patient-related data and<br>communicates with the other<br>components of eMurmur ID. The<br>interface to the other components is a<br>REST/JSON web API. | Equivalent architecture. The API uses the<br>XML data format instead of JSON. Is<br>equipped with algorithm identical to<br>K121617. | Equivalent architecture. Instead of a<br>mobile app, a desktop app is used.<br>The API uses the XML data format<br>instead of JSON. The equivalence of<br>algorithm performance is<br>demonstrated in a clinical trial. |
| Safety Features | Encrypted internet traffic, data stored in<br>the database on the backend is<br>encrypted, data in the database is<br>duplicated to another database in a<br>different datacenter, no protected<br>health information is stored on the<br>user's devices, user needs to<br>authenticate, user can only access<br>authorized data | Identical regarding aspects that are<br>verifiable by CSD Labs. | Identical regarding aspects that are<br>verifiable by CSD Labs. |

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### PERFORMANCE DATA

Performance data included software verification and validation testing, electromagnetic compatibility, electrical safety, wireless coexistence, and bench validation testing using existing heart sound databases. It also included a pivotal clinical study. The pivotal clinical study was conducted comparing eMurmur ID to the reference device, SensiCardiac (K121617) — the predecessor to the primary predicate, SensiCardiac Mobi (K131044), which was not yet commercially available for comparison at the time of testing — in a prospective clinical investigation. It verified the hypothesis that eMurmur ID can distinguish between AHA class I (pathologic murmurs) and AHA class III heart sounds (innocent murmurs and/or no murmurs) with a sensitivity and specificity not worse than that of the predicate device.

The study population consisted of 120 subjects across all ages where 50% had a confirmed pathological murmur (class )) and 50% had a confirmed innocent or no murmur (class III). Patient's heart sounds were recorded by the expert physician and analyzed by both eMurmur ID and the predicate device. The findings for both devices were compared to clinical gold standard reference, defined as the expert physician's auscultation-based diagnosis, independently verified by cardiac echocardiography.

The following table shows the results of the primary (sensitivity, specificity) and secondary (accuracy) endpoints of the study with their respective 95% confidence intervals. The results were compared using the 95%-Fleiss confidence interval method for paired binary data.

| | eMurmur ID | SensiCardiac |
|----------------------|---------------------|---------------------|
| Sensitivity (95% CI) | 85.0% (72.9%-92.5%) | 58.3% (44.9%-70.7%) |
| Specificity (95% CI) | 86.7% (74.9%-93.7%) | 58.3% (44.9%-70.7%) |
| Accuracy (95% CI) | 85.8% (78.0%-91.3%) | 58.3% (49.0%-67.2%) |

The results of the study met the criteria for successfully demonstrating that eMurmur ID performance was not worse than the predicate device. In fact, the actual study results demonstrated that the eMurmur ID performed statistically significantly better than the predicate with respect to both sensitivity (p=0.0014) and specificity (p=0.0009), as well as with respect to overall accuracy (p<0.0001).

In all instances, eMurmur ID functioned as intended, and the electromagnetic compatibility, bench testing, and clinical performance observed were as expected.

# CONCLUSIONS

Performance data demonstrate that the eMurmur ID software system performs in a manner that is comparable to the reference device, meeting the criteria that it be at least non-inferior. eMurmur ID has the same intended uses and similar indications, technological characteristics, and principles of operation as the predicate device. The minor technological differences between eMurmur ID and its predicate device raise no new questions of safety or effectiveness. Thus, eMurmur ID is substantially equivalent.