(141 days)
Not Found
No
The description details a calculation based on a fixed formula using electrical impedance, height, age, and gender, not adaptive learning or pattern recognition characteristic of AI/ML. The "Mentions AI, DNN, or ML" section is explicitly marked as "Not Found".
No
The device is indicated for measuring body weight and estimating body fat, water, and bone mass for generally healthy individuals, not for treating or preventing any disease or condition.
No
The device is marketed for measuring body weight and estimating body fat, water, and bone mass. The provided text indicates its use is for generally healthy individuals and explicitly states it is not for diagnosing or monitoring medical conditions.
No
The device description explicitly states that the device is a "scale device" with "two electrodes" that the patient steps on. This indicates the presence of hardware components beyond just software.
Based on the provided information, the KRELL Weight & Body Fat Monitoring Scale is not an In Vitro Diagnostic (IVD) device.
Here's why:
- IVD Definition: IVD devices are used to examine specimens derived from the human body (like blood, urine, tissue) to provide information for diagnosis, monitoring, or screening.
- KRELL Scale Function: The KRELL scale measures body weight and uses bioelectrical impedance analysis (BIA) to estimate body composition (fat, water, bone mass). It does this by passing a small electrical current through the body and measuring the impedance.
- No Specimen Analysis: The device does not analyze any biological specimens taken from the body. It interacts directly with the body's electrical properties.
Therefore, the KRELL Weight & Body Fat Monitoring Scale falls under the category of a non-invasive medical device that provides body composition measurements, rather than an IVD device.
N/A
Intended Use / Indications for Use
The KRELL Weight & Body Fat Monitoring Scale is indicated to measure body weight and impedance and estimate the percentage of Body Fat and body water, Bones mass using BIA (bioelectrical impedance analysis). This product is for use by generally healthy adults and children (from age 10 and up) who are not ill, feverish, have a chronic or acute disease, or a condition that affects the level of hydration such as pregnancy.
Product codes (comma separated list FDA assigned to the subject device)
MNW
Device Description
The patient steps on the scale device, where two electrodes are located. The patient must step on the electrodes with bare feet, with normal moisture. Through harmless current stimulation of 500 µA, at 50 kHz, the Krell Body Fat Analyzer calculates the body fat percentage. This calculation is done via the Bioelectrical Impedance Method. The current is passed through the body and the impedance of the body determines the body fat. The calculation is based upon electrical impedance, height, age. and gender. The calculation is performed via internal software, which uses the variables programmed in by the user. There are elements of this process that can produce erroneous readings, such as dry feet or improperprogrammed data. The User's Manual defines items which could cause erroneous readings.
This bioelectrical impedance method has been validated via DXA (Dual Energy X-Ray Absorptiometry).
As discussed in the General description, the Krell Body Fat Analyzer is relatively simple to use. The user inputs the variable data of age, height, and gender. The user steps onto the scale and the devices measures the user weight and body impedance (via the Bioelectric Impedance through the two electrodes on the scale). The scale displays the user's body fat composition. Upon the user's selection, the device can also display the user's weight.
Mentions image processing
Not Found
Mentions AI, DNN, or ML
Not Found
Input Imaging Modality
Not Found
Anatomical Site
body
Indicated Patient Age Range
from age 10 and up
Intended User / Care Setting
Not Found
Description of the training set, sample size, data source, and annotation protocol
Not Found
Description of the test set, sample size, data source, and annotation protocol
Not Found
Summary of Performance Studies (study type, sample size, AUC, MRMC, standalone performance, key results)
Clinical testing was used to validate the effectiveness and accuracy of the device. All test results were satisfactory.
Key Metrics (Sensitivity, Specificity, PPV, NPV, etc.)
Not Found
Predicate Device(s): If the device was cleared using the 510(k) pathway, identify the Predicate Device(s) K/DEN number used to claim substantial equivalence and list them here in a comma separated list exactly as they appear in the text. List the primary predicate first in the list.
Reference Device(s): Identify the Reference Device(s) K/DEN number and list them here in a comma separated list exactly as they appear in the text.
Not Found
Predetermined Change Control Plan (PCCP) - All Relevant Information for the subject device only (e.g. presence / absence, what scope was granted / cleared under the PCCP, any restrictions, etc).
Not Found
§ 870.2770 Impedance plethysmograph.
(a)
Identification. An impedance plethysmograph is a device used to estimate peripheral blood flow by measuring electrical impedance changes in a region of the body such as the arms and legs.(b)
Classification. Class II (special controls). The device, when it is a body composition analyzer which is not intended to diagnose or treat any medical condition, is exempt from the premarket notification procedures in subpart E of part 807 of this chapter subject to the limitations in § 870.9.
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4081587 PAGE 1 OF 3
510(k) Summary
OCT 2 4 2008
This summary of 510(k) safety and effectiveness information is being submitted in accordance with requirements of 21 CFR Part 807.92.
Date: March 11, 2007
1. Company and Correspondent making the submission:
- Name Krell Precision (Yang Zhou) Co., LTD
- Address Number 28, Xing Yang Road, Yang Zhou, Jiang Su Province,
- China
Telephone -- +86(0)514-87961819
Fax - +86(0)514-87961918
- Contact Mike Zheng
- Email mike zheng@krellprecision.com
-
- Device :
Trade/proprietary name: KRELL WEIGHT AND BODY FAT SCALE/BFA-
8530
| Common Name | : Analyzer, Body Fat |
|---|---|
| ------------- | ---------------------- |
Classification Name : Impedance plethysmograph
-
- Predicate Devices :
Tanita BC-533, (K040778); Bonso Health o meter BMF583
- Predicate Devices :
-
- Classifications Names & Citations :
21CFR 870.2770, MNW, Body Fat Analyzer, Class2
- Classifications Names & Citations :
1
5. Description :
- 5.1 General
The patient steps on the scale device, where two electrodes are located. The patient must step on the electrodes with bare feet, with normal moisture. Through harmless current stimulation of 500 µA, at 50 kHz, the Krell Body Fat Analyzer calculates the body fat percentage. This calculation is done via the Bioelectrical Impedance Method. The current is passed through the body and the impedance of the body determines the body fat. The calculation is based upon electrical impedance, height, age. and gender. The calculation is performed via internal software, which uses the variables programmed in by the user. There are elements of this process that can produce erroneous readings, such as dry feet or improperprogrammed data. The User's Manual defines items which could cause erroneous readings.
This bioelectrical impedance method has been validated via DXA (Dual Energy X-Ray Absorptiometry).
5.2 Direction
As discussed in the General description, the Krell Body Fat Analyzer is relatively simple to use. The user inputs the variable data of age, height, and gender. The user steps onto the scale and the devices measures the user weight and body impedance (via the Bioelectric Impedance through the two electrodes on the scale). The scale displays the user's body fat composition. Upon the user's selection, the device can also display the user's weight.
6. Indication for use :
The KRELL Weight & Body Fat Monitoring Scale is indicated to measure body weight and impedance and estimate the percentage of Body Fat and body water, Bones mass using BIA (bioelectrical impedance analysis). This product is for use by generally healthy adults and children (from age 10 and up) who are not ill, feverish, have a chronic or acute disease, or a condition that affects the level of hydration such as pregnancy.
2
-
- Safety and Performance Data :
Electrical, mechanical, environmental safety and performance testing according to standard EN/IEC 60601-1. Clinical testing was used to validate the effectiveness and accuracy of the device. All test results were satisfactory.
- Safety and Performance Data :
CF 2
-
- Conclusions:
In accordance with the Federal Food, Drug and Cosmetic Act, 21 CFR Part 807 and based on the information provided in this premarket notification Krell. Inc. concludes that The Krell Weight and Body Fat Scale is safe and effective and substantially equivalent to predicate devices as described herein.
- Conclusions:
-
- Krell Precision (Yang Zhou) Co., LTD will update and include in a summary any other information deemed seasonably necessary by the FDA.
END
- Krell Precision (Yang Zhou) Co., LTD will update and include in a summary any other information deemed seasonably necessary by the FDA.
3
DEPARTMENT OF HEALTH & HUMAN SERVICES
Image /page/3/Picture/1 description: The image shows the seal for the Department of Health & Human Services - USA. The seal is circular and contains the words "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" around the perimeter. In the center of the seal is an abstract image of an eagle.
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
OCT 2 4 2008
Krell Precision (Yang Zhou) Co., Ltd. c/o Mr. Charles Mack Principal Engineer International Regulatory Consultants, LLC 340 Shady Grove Road FLINTVILLE TN 37335
Re: K081587
Trade/Device Name: KRELL Weight & Body Fat Monitoring Scale, Model BFA-8530 Regulation Number: 21 CFR §870.2770 Regulation Name: Impedance plethysmograph Regulatory Class: II Product Code: MNW Dated: October 12, 2008 Received: October 20, 2008
Dear Mr. Mack:
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.
If your device is classified (see above) into either class II (Special Controls) or class III (PMA), it may be subject to such 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 conceming your device in the Federal Register.
4
Page 2
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); good manufacturing practice requirements as set forth in the quality systems (OS) regulation (21 CFR Part 820); and if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR 1000-1050.
This letter will allow you to begin marketing your device as described in your Section 510(k) premarket notification. The FDA finding of substantial equivalence of your device to a legally marketed predicate device results in a classification for your device and thus, permits your device to proceed to the market.
If you desire specific advice for your device on our labeling regulation (21 CFR Part 801), please contact the Office of Compliance at one of the following numbers, based on the regulation number at the top of this letter:
| 21 CFR 876.xxx | (Gastroenterology/Renal/Urology) | 240-276-0115 |
|---|---|---|
| 21 CFR 884.xxx | (Obstetrics/Gynecology) | 240-276-0115 |
| 21 CFR 894.xxx | (Radiology) | 240-276-0120 |
| Other | 240-276-0100 |
Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21CFR Part 807,97). For questions regarding postmarket surveillance, please contact CDRH's Office of Surveillance and Biometrics' (OSB's) Division of Postmarket Surveillance at 240-276-3474. For questions regarding the reporting of device adverse events (Medical Device Reporting (MDR)), please contact the Division of Surveillance Systems at 240-276-3464. You may obtain other general information on your responsibilities under the Act from the Division of Small Manufacturers. International and Consumer Assistance at its toll-free number (800) 638-2041 or (240) 276-3150 or at its Internet address http://www.fda.gov/cdrh/industry/support/index.html.
Sincerely yours,
Jorgu M. Whang
Joyce M. Whang, Ph.D Acting Director. Division of Reproductive. Abdominal, and Radiological Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
5
Indications for Use
Indications for Use
510(k) Number (if known):
Device Name: Weight & Body Fat Monitoring Scale (Model BFA-8530)
Indications For Use:
The KRELL Weight & Body Fat Monitoring Scale is indicated to measure body weight and impedance and estimate the percentage of Body Fat and body water, Bones mass using BIA (bioelectrical impedance analysis). This product is for use by generally healthy adults and children (from age 10 and up) who are not ill, feverish, have a chronic or acute disease, or a condition that affects the level of hydration such as pregnancy.
Prescription Use (Part 21 CFR 801 Subpart D) AND/OR
Over-The-Counter Use X (21 CFR 801 Subpart C)
(PLEASE DO NOT WRITE BELOW THIS LINE-CONTINUE ON ANOTHER PAGE IF NEEDED)
Concurrence of CDRH, Office of Device Evaluation (ODE)
DIVISION Sign-Off)
(Division Sign-Off)
Division of Reproductive, Abdominal,
and Radiological Devices
510(k) Number K081587
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