Accutension Smartphone Auscultatory Blood

K180335 · Shanghai Hulu Devices Co., Ltd. · DXQ · Mar 8, 2018 · Cardiovascular

Device Facts

• Record ID: K180335
• Device Name: Accutension Smartphone Auscultatory Blood
• Applicant: Shanghai Hulu Devices Co., Ltd.
• Product Code: DXQ · Cardiovascular
• Decision Date: Mar 8, 2018
• Decision: SESE
• Submission Type: Traditional
• Regulation: 21 CFR 870.1120
• Device Class: Class 2
• Attributes: 3rd-Party Reviewed

Intended Use

Accutension Smartphone Auscultatory Blood Pressure Kit is intended for professionals or home users to nonautomatically measure systolic and diastolic blood pressure on adults by detecting Korotkoff sounds and measure pulse rate on adults by detecting oscillometry. This device is not indicated for children, heart failure patients and critical patients.

Device Story

System measures blood pressure and pulse rate; comprises arm cuff, pressure sensing module, hand pump, stethoscope, and iOS app. User manually inflates cuff; pressure sensing module transmits cuff pressure to iOS app via Bluetooth; stethoscope detects Korotkoff sounds, transmitting audio to smartphone via earphone jack. App visualizes cuff pressure and auscultatory sounds; user determines systolic/diastolic pressure by identifying first/last Korotkoff sounds. Pulse rate calculated automatically via oscillometry. Used by professionals or home users in clinical or home environments. Output allows users to track blood pressure history and visualize measurements. Benefits include digital tracking and visualization of traditional auscultatory measurements.

Clinical Evidence

Clinical study per ISO 81060-2:2013 using same-arm simultaneous method. 255 data pairs from 85 subjects compared against a manual mercury sphygmomanometer. Results confirmed device accuracy satisfies ISO 81060-2:2013 criteria.

Technological Characteristics

System includes fabric cuff with bladder, manual hand pump, electrical pressure sensor, and stethoscope. Connectivity via Bluetooth (iOS app). Complies with IEC 60601-1, IEC 60601-1-2, IEC 60601-1-11, ISO 81060-1, and FCC Part 15. Biocompatibility per ISO 10993-5 and ISO 10993-10.

Indications for Use

Indicated for adult patients requiring non-automatic systolic/diastolic blood pressure measurement via Korotkoff sounds and pulse rate measurement via oscillometry. Not indicated for children, heart failure patients, or critical patients.

Regulatory Classification

Identification

A blood pressure cuff is a device that has an inflatable bladder in an inelastic sleeve (cuff) with a mechanism for inflating and deflating the bladder. The cuff is used in conjunction with another device to determine a subject's blood pressure.

Predicate Devices

• Aneroid Sphygmomanometer BK2002 (K043286)
• HEM-7320 (K133383)

Reference Devices

• AliveCor Heart Monitor (K142743)

Submission Summary (Full Text)

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March 8, 2018

Shanghai Hulu Devices Co., Ltd. % Dave Yungvirt Third Party Review Group, LLC The Old Station House 24 Lackawanna Place Millburn, New Jersey 07041

Re: K180335

Trade/Device Name: Accutension Smartphone Auscultatory Blood Pressure Kit Regulation Number: 21 CFR 870.1120 Regulation Name: Blood Pressure Cuff Regulatory Class: Class II Product Code: DXQ, DQD Dated: February 5, 2018 Received: February 6, 2018

Dear Dave Yungvirt:

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. 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); good manufacturing practice requirements as set forth in the quality systems (QS) regulation (21 CFR Part 820);

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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 the CDRH's Office of Surveillance and Biometrics/Division of Postmarket Surveillance.

For comprehensive regulatory information about mediation-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,

M.A. Hillebrenner

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)

K180335

Device Name Accutension Smartphone Auscultatory Blood Pressure Kit

Indications for Use (Describe)

Accutension Smartphone Auscultatory Blood Pressure Kit is intended for professionals or home users to nonautomatically measure systolic and diastolic blood pressure on adults by detecting Korotkoff sounds and measure pulse rate on adults by detecting oscillometry. This device is not indicated for children, heart failure patients and critical patients.

| Type of Use (Select one or both, as applicable) | |
|------------------------------------------------------------|-----------------------------------------------------------|
| <span></span> Prescription Use (Part 21 CFR 801 Subpart D) | <span></span> Over-The-Counter Use (21 CFR 801 Subpart C) |

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### 510(k) Summary

This summary of 510(k) safety and effectiveness information is being submitted in accordance with requirements of 21 CFR Part 807.92.

| Submitted by: | Shanghai Hulu Devices Co., Ltd<br>No. 509 Caobao Road, Room 101-2 Bld 9, Xuhui<br>District, Shanghai, China |
|-------------------|-------------------------------------------------------------------------------------------------------------|
| Contact Person: | Junfeng Zhao<br>Phone: [phone]<br>Fax: [phone]#805<br>Email: [e-mail] |
| Date Prepared: | Mar 26, 2017 |
| Device Name: | Accutension Smartphone Auscultatory Blood<br>Pressure Kit |
| Model | XYZ-110 |
| Common Name: | Blood Pressure Cuff |
| Classification: | II |
| Regulation Number | 870.1120 |
| Regulation Name: | Blood Pressure Cuff |
| Product Code: | DXQ, DQD |

#### 5.1 Predicate Device

Aneroid Sphygmomanometer BK2002 (Wenzhou Bokang Instrument Co., Ltd, K043286) is used as a predicate device compared to Accutension Smartphone Auscultatory Blood Pressure Kit on blood pressure measurement.

HEM-7320 (OMRON HEALTHCARE, INC., K133383) is used as a predicate device compared to Accutension Smartphone Auscultatory Blood Pressure Kit on pulse rate measurement.

## 5.2 Reference Device

AliveCor Heart Monitor (AliveCor, Inc., K142743) is used as a reference device compared to Accutension Smartphone Auscultatory Blood Pressure Kit on store and record waveforms.

## 5.3 Device Description

The Accutension Smartphone Auscultatory Blood Pressure Kit (Model XYZ-110) is a non-invasive blood pressure measurement system for professionals and home users to nonautomatically measure systolic and diastolic blood pressure and pulse rate. It utilizes advanced pressure sensing module to transfer cuff pressure value to an iOS App via established Bluetooth connection between the module and the iOS device during measurement, meanwhile a stethoscope detects Korotkoff sounds and transfers the sound signal to the smartphone via its earphone jack. Both the cuff

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pressure and auscultatory sounds are visualized in the app and a user can determine the systolic and diastolic blood pressure by finding the cuff pressures on the first and last Korotkoff sounds. It automatically calculates the pulse rate based on cuff pressure oscillometry.

This device consists of 5 parts, arm cuff, pressure sensing module, hand pump (bulb) with airflow valve, stethoscope with earphone plug and charging cable. None of the 5 parts of the Accutension Smartphone Auscultatory Blood Pressure Kit have received 510(k) clearance on their own as a stand-alone device. Instead, collectively, they are considered to be components of a device that is substantially equivalent to the cited predicate device.

### 5.4 Indication for Use

Accutension Smartphone Auscultatory Blood Pressure Kit is intended for professionals or home users to nonautoamatically measure systolic and diastolic blood pressure on adults by detecting Korotkoff sounds and measure pulse rate on adults by detecting oscillometry. This device is not indicated for children, heart failure patients and critical patients.

The indication for use statement is similar to that of the predicate device K043286 on blood pressure measurement: The device is intended to be used by medical professional or in the home for the measurement of systolic and diastolic pressure on adults. The device is intended to be manually attached to patient and manually inflated along with a manual method for detecting Korotkoff sounds. In both statements, the user who operate the device is the same: either professionals or home users, the subject who is measured is the same: adults, the function is the same: measure systolic and diastolic blood pressure, and the method is the same: detecting Korotkoff sounds. The proposed device emphasizes that it is not for children, heart failure patients and critical patients to further clarify the measurement subjects.

The indication for use statement is similar to that of the predicate device K133383 on pulse rate measurement. The pulse rate measurement method is the same. Both use oscillometry to calculate the pulse rate.

#### 5.5 Technology Characteristics

Accutension Smartphone Auscultatory Blood Pressure Kit uses the Korotkoff sounds based blood pressure determination method that is used by the predicate device. Here is a comparison on the technology characteristics between the current device and the predicate device.

| Technology<br>Characteristics | Current<br>Device | Predicate<br>Device | Comments |
|----------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Cuff design | Fabric cuff | Fabric cuff | Same |
| | with bladder | with bladder | |
| Cuff inflation<br>mechanism | Manual<br>inflation with<br>hand pump | Manual<br>inflation with<br>hand pump | Same |
| Cuff pressure<br>gauge | Electrical<br>pressure<br>sensor | Mechanical<br>pressure<br>sensor | These two types of pressure sensor<br>has the same grade of accuracy<br>defined in ISO 81060-1. |
| Pressure<br>display | Displayed on<br>a<br>smartphone | Displayed on<br>a mechanical<br>dial | The pressure displayed on the<br>smartphone is digitalized (directly<br>show the cuff pressure number).<br>The predicate device uses a needle<br>to point to the cuff pressure<br>number in the dial. These two are<br>similar because a user can get the<br>cuff pressure number in either way. |
| Korotkoff<br>sounds picking | Stethoscope<br>head | Stethoscope<br>head | The mechanical mechanism of the<br>stethoscope head is similar |
| Korotkoff<br>sounds<br>processing | Recorded<br>with a<br>microphone<br>sensing the<br>picked<br>Korotkoff<br>sounds from<br>the<br>stethoscope<br>head and<br>then<br>playback to<br>the human<br>ear. | The sounds<br>directly go to<br>the human<br>ear. | The difference is that the current<br>device records the sounds first and<br>then playback the sounds to the<br>human ears for blood pressure<br>determination while the predicate<br>device transfer the sounds directly<br>to the human ears for blood<br>pressure determination. |
| Blood<br>pressure<br>determination | By listening<br>to the<br>Korotkoff<br>sounds with<br>human ear | By listening<br>to the<br>Korotkoff<br>sounds with<br>human ear | The same |
| Sounds and<br>cuff pressure<br>visualization | Sounds and<br>cuff pressure<br>are visualized | No such<br>feature | This provides an extra feature to<br>help capture the first and last<br>Korotkoff sounds for blood pressure<br>determination. |
| Blood<br>pressure<br>storage | The blood<br>pressure<br>readings can<br>be stored in | No such<br>feature | This provides an extra feature to<br>track blood pressure history. |
| | the<br>smartphone | | |
| Pulse rate<br>calculation | Oscillometry | Oscillometry | The same |

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Overall, the current device uses more up-to-date technologies to implement the same blood pressure measurement method used by the predicate device to improve blood pressure measurement.

## 5.6 Applicable Guidance Document

FDA Guidance for Industry: Non-Automated Sphygmomanometer (Blood Pressure Cuff) Guidance - Version 1 (1998).

## 5.7 Clinical Test

255 pairs of data from 85 valid subjects were achieved following the clinical study protocol defined in ISO 81060-2:2013. Same arm simultaneous method was adopted during the clinical validation for Accutension Smartphone Auscultatory Blood Pressure Kit. A manual Mercury Sphygmomanometer was used as a reference device in the clinical testing. All the subjects who enrolled in this study were well informed of the value and the risk of the study by the researchers and signed the consent forms before they took part in the clinical study. The results showed the accuracy of the device made by Shanghai Hulu Devices Co, Ltd. satisfies the criteria specified in ISO 81060-2:2013.

## 5.8 Non-clinical Test

# 5.8.1 Biocompatibility Testing

The biocompatibility evaluation for this device was conducted in accordance with the FDA Bluebook Memorandum G95-1 "Use Of International Standard ISO-10993, 'Biological Evaluation Of Medical Devices Part 1: Evaluation And Testing.'" and the International Standard ISO 10993-1 Fourth Edition 2009-10-15, Biological Evaluation Of Medical Devices - Part 1: Evaluation And Testing Within A Risk Management Process [Including: Technical Corrigendum 1 (2010)], as recognized by FDA.

| Biocompatibility<br>Test | Standard<br>requirement | Test Result | Conclusion |
|---------------------------------|------------------------------------------------------------------|--------------------------------------------------------------------------------------|------------|
| In Vitro<br>Cytotoxicity Test | ISO 10993-5:2009<br>Cytotoxicity<br>Should no toxicity. | The test article did<br>not show potential<br>toxicity to L-929<br>cells. | Qualified |
| Guinea Pig<br>Maximization Test | ISO 10993-10:2010<br>There should be<br>no skin<br>sensitization | No significant<br>evidence of<br>causing skin<br>sensitization in the<br>guinea pig. | Qualified |
| Skin Irritation Test | ISO | The response of | Qualified |

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| 10993-10:2010<br>There should be<br>no skin irritation. | skin on testing side<br>does not exceed<br>that on the control<br>side. Thus, it is<br>identified as grade<br>0. | |
|---------------------------------------------------------|------------------------------------------------------------------------------------------------------------------|--|
|---------------------------------------------------------|------------------------------------------------------------------------------------------------------------------|--|

# 5.8.2 Performance Testing

We have performed bench tests and found that the Accutension Smartphone Auscultatory Blood Pressure Kit met all requirements specifications and standards requirement. Testing includes the following:

- -Testing for compliance to IEC 60601-1:2012
- -Testing for compliance to IEC 60601-1-2:2014
- -Testing for compliance to IEC 60601-1-11:2015
- -Testing for compliance to ISO 81060-1:2007
- Testing for compliance to FCC CFR Title 47 Part 15 Subpart C Section 15.247 -
- Besides the testing for compliance, we did the additional bench tests:
- -Testing to demonstrate pulse rate accuracy
- Testing to demonstrate wireless co-existence -
- -Testing to demonstrate stethoscope performance

# 5.8.2.1 Usability Study Summary

30 people participated in human factor validation testing, in which 15 participants are general users while another 15 participants are healthcare professionals, to simulate the use of the device in both home and clinical office environment. All the participants completed all the tasks without use error.The results showed the Accutension Smartphone Auscultatory Blood Pressure (BP) Kit is safe and effective for the intended users, uses and use environments.

# 5.8.2.2 Synchronization Testing Summary

Synchronization of the stethoscope sounds and cuff pressures was tested. In the test, the same stethoscope sounds and cuff pressures collected by the Accutension Smartphone Auscultatory Blood Pressure Kit were compared with those directly sensed by a data acquisition card. The later one has a zero time difference in theory. The time difference criteria was set as -150ms<ΔT<150ms. The measured ΔTmax is less than 150ms and passed the test.

## 5.9 Conclusion

The biocompatibility testing results demonstrate the equivalence to the predicate device on biocompatibility requirement. The performance testing results demonstrate the same level of safety, effectiveness and performance though new technology characteristics are introduced. The clinical test results demonstrate the current device is as safe and effective (accurate) in a clinical environment. In accordance with the Federal Food, Drug and Cosmetic Act, 21 CFR Part 807, based on

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the information provided in this premarket notification, Shanghai Hulu Devices Co., Ltd concludes that Model XYZ-110 Accutension Smartphone Auscultatory Blood Pressure Kit is substantially equivalent to the predicate and complies to testing defined in ISO 81060-1 standard.

## 5.10 Others

Shanghai Hulu Devices Co., Ltd will update and include in this summary any other information deemed necessary by FDA.