(449 days)
The Tanita Body Composition Analyzer is indicated for use in the measurement of weight and impedance, and the estimation of body mass index (BMI), total body and segmental fat percent and weight, total body water percent and weight, intracellular and extracellular water weight, total body and segmental muscle mass, physique rating, bone mass, visceral fat rating with healthy range, basal metabolic rate (BMR), and fat free mass (FFM), using BIA (Bioelectrical Impedance Analysis).
The device is indicated for use for healthy children 5–17 years old and healthy adults with active, moderately active, to inactive lifestyles.
For subjects 17 years old and younger, only fat % is displayed.
The Tanita Model MC-180MA Multi-frequency Body Composition Analyzer is a computer-operated body composition analyzer that utilizes bioelectrical impedance analysis (BIA) to estimate body composition of fat, muscle and bone, water compartments, and basal metabolic rate (BMR).
Actual measurements made by the MC-180MA include body weight and bioelectrical impedance. BIA is used to make estimates based upon these measured values.
Here's an analysis of the provided text regarding the Tanita MC-180MA Multi-frequency Body Composition Analyzer and the requested information.
It's important to note that the provided text is a 510(k) summary for a premarket notification to the FDA. These documents primarily focus on demonstrating "substantial equivalence" to existing predicate devices, rather than detailed performance studies with acceptance criteria in the way a clinical trial for a novel drug or a high-risk medical device might. Therefore, some of the requested information (like specific acceptance criteria thresholds, detailed study outlines with sample sizes for test sets, expert qualifications, and multi-reader multi-case studies) is generally not present in this type of FDA submission. The focus here is on technological characteristics comparison rather than rigorous clinical validation against an established gold standard for accuracy metrics.
Acceptance Criteria and Device Performance
1. Table of Acceptance Criteria and Reported Device Performance
Based on the provided K100183 510(k) summary, specific numerical acceptance criteria (e.g., "accuracy must be within X% of the gold standard") are not explicitly stated or detailed. The document focuses on demonstrating substantial equivalence to predicate devices. The "performance" is implicitly deemed acceptable because its underlying technology and intended use are similar to already cleared devices.
The document states:
- "Multiple-frequency measurement of bioelectrical impedance values used in estimation of percent fat, fat-free mass, total body water and extracellular water was verified in clinical testing." This indicates some form of testing was done, but details are not provided.
- "Comparison of these intended-use and technological characteristics demonstrate that the Model MC-180MA is substantially equivalent to predicate devices." This is the core "performance" claim in the context of a 510(k).
Therefore, a table of explicit acceptance criteria and corresponding performance cannot be constructed from the provided text. The "acceptance criterion" is effectively: "demonstrate substantial equivalence to predicate devices." The "reported device performance" is the assertion that this substantial equivalence has been met through comparison of technological characteristics and clinical verification.
2. Sample Size Used for the Test Set and Data Provenance
The document mentions "verified in clinical testing," but does not specify the sample size for any test set or provide details on data provenance (e.g., country of origin, retrospective or prospective nature of the "clinical testing").
3. Number of Experts Used to Establish Ground Truth for the Test Set and Qualifications
This information is not provided in the 510(k) summary. For Bioelectrical Impedance Analysis (BIA) devices, "ground truth" would typically involve comparison to a more established body composition measurement method (e.g., DEXA, hydrostatic weighing), rather than expert consensus on images.
4. Adjudication Method for the Test Set
This information is not provided in the 510(k) summary. Given the nature of BIA devices, clinical adjudication by human experts in the way it's done for image analysis or diagnostic tools is generally not applicable.
5. If a Multi-Reader Multi-Case (MRMC) Comparative Effectiveness Study Was Done
No, a Multi-Reader Multi-Case (MRMC) comparative effectiveness study is not applicable for this device type (body composition analyzer using BIA) and is not mentioned in the document. MRMC studies are typically used for diagnostic imaging devices where human readers interpret results, and the study assesses the impact of AI assistance on their performance. This device is a standalone measurement tool.
6. If a Standalone (i.e., algorithm only without human-in-the-loop performance) Was Done
Yes, implicitly. The device itself, the Tanita MC-180MA, is a standalone algorithm (BIA) that measures impedance and then applies algorithms to estimate body composition. The "clinical testing" mentioned would have been to verify the accuracy of these algorithms in producing the stated outputs. The device operates independently of human interpretation in its core function.
7. The Type of Ground Truth Used
The document implicitly refers to "clinical testing" where "multiple-frequency measurement of bioelectrical impedance values... was verified." For BIA devices, the "ground truth" for verification typically involves comparison with established, more accurate body composition assessment methods such as:
- Dual-energy X-ray absorptiometry (DEXA)
- Hydrostatic weighing (underwater weighing)
- Isotope dilution
- Magnetic Resonance Imaging (MRI)
- Computed Tomography (CT)
However, the specific "type of ground truth" method used in their verification is not explicitly stated in the provided text.
8. The Sample Size for the Training Set
The document does not specify the sample size for any training set. It refers to "multiple-regression algorithms to predict body composition," implying that these algorithms were trained or developed using some dataset, but the size is not disclosed.
9. How the Ground Truth for the Training Set Was Established
The document does not specify how the ground truth for any training set was established. Similar to point 7, it would likely involve comparisons to other body composition assessment methods, but details are not provided.
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K100183 1 OF 2 PAGE
APR 1 5 2011
510(k) Summary
The following information is provided in accordance with the requirements of the SMDA 1990 and 21 CFR 807.92
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- Submitter: Tanita Corporation 14-2, 1-Chome, Maeno-cho, Itabashi-ku Tokyo 174-8630 Japan Telephone: +81 3 3968 2118 Fax: +81 3 3968 1550 E-mail: takeuchi@tanita.co.jp Data of summary: April 13, 2011
| 2. Name of the Device: | MC-180MA Multi-frequency Body Composition Analyzer |
|---|---|
| Trade / Proprietary Name: | MC-180MA Multi-frequency Body Composition Analyzer |
| Common or Usual Name: | Body Composition Analyzer |
| Classification Name: | Analyzer, Body Composition21 CFR §870.2770Class IIProduct Code: MNW |
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- Predicate devices to claim substantial equivalence:
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- Description of the Device:
The Tanita Model MC-180MA Multi-frequency Body Composition Analyzer is a computer-operated body composition analyzer that utilizes bioelectrical impedance analysis (BIA) to estimate body composition of fat, muscle and bone, water compartments, and basal metabolic rate (BMR).
Actual measurements made by the MC-180MA include body weight and bioelectrical impedance. BIA is used to make estimates based upon these measured values.
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- Intended Use Statement:
The Tanita Body Composition Analyzer is indicated for use in the measurement of weight and impedance, and the estimation of body mass index (BMI), total body and
- Intended Use Statement:
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Image /page/1/Picture/0 description: The image shows the text "K100183 PAGE 2 OF 2". The text is written in a handwritten style. The text appears to be a page number or document identifier.
segmental fat percent and weight, total body water percent and weight, intracellular and extracellular water weight, total body and segmental muscle mass, physique rating, bone mass, visceral fat rating with healthy range, basal metabolic rate (BMR), and fat free mass (FFM), using BIA (Bioelectrical Impedance Analysis).
The device is indicated for use for healthy children 5-17 years old and healthy adults with active, moderately active, to inactive lifestyles.
For subjects 17 years old and younger, only fat % is displayed.
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- Summary of technological characteristics compared to predicate devices:
Both the Tanita Model MC-180MA and predicate devices (Item 3 above) are intended for use to measure weight and bioelectrical impedance, and estimate body composition (fat, muscle, bone and water) by BIA in healthy children and in healthy adults.
- Summary of technological characteristics compared to predicate devices:
The technology underlying BIA estimation for the Model MC-180MA and predicate devices is the same. Design considerations-computer-operation with visual-display user interface; use of multiple-regression algorithms to predict body composition based upon body weight and segmental bioelectrical impedance measurements-and energysource considerations-multipolar surface electrodes; alternating current in the 5- to 500-kilohertz range at levels of 90 microamperes (Tanita models) to 250 microamperes (Biospace model)-are the same. Multiple-frequency measurement of bioelectrical impedence values used in estimation of percent fat, fat-free mass, total body water and extracellular water was verified in clinical testing.
Comparison of these intended-use and technological characteristics demonstrate that the Model MC-180MA is substantially equivalent to predicate devices.
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Image /page/2/Picture/0 description: The image shows the seal for the Department of Health & Human Services - USA. The seal is circular with the text "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 10903 New Hampshire Avenue Document Mail Center - WO66-G609 Silver Spring, MD 20993-0002
Tanita Corporation c/o Mr. Toshihiko Ishikawa Product Manager Tanita Corporation of America, Inc. 2625 South Clearbrook Drive ARLINGTON HEIGHTS IL 60005
APR 1 5 2011
Re: K100183
Trade/Device Name: Tanita MC-180MA Multi-frequency Body Composition Analyzer Regulation Number: 21 CFR §870.2770 Regulation Name: Impedance plethysmograph Regulatory Class: II Product Code: MNW Dated: April 13, 2011 Received: April 14, 2011
Dear Mr. Ishikawa:
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
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Page 2
adverse events) (21 CFR 803); good manufacturing practice requirements as set forth in the quality systems (QS) regulation (21 CFR Part 820); and if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR 1000-1050.
If you desire specific advice for your device on our labeling regulation (21 CFR Part 801), please go to http://www.fda.gov/AboutFDA/CentersOffices/CDRH/CDRHOffices/ucm115809.htm for the Center for Devices and Radiological Health's (CDRH's) Office of Compliance. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21CFR 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.
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 (301) 796-7100 or at its Internet address
http://www.fda.gov/MedicalDevices/Resourcesfor You/Industry/default.htm.
Sincerely yours,
Hubert Humphrey
Herbert P. Lerner, M.D., Director (Acting) Division of Reproductive. Gastro-Renal and Urological Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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Indications for Use Statement
510(k) Number (if known): K100183
Device Name: Tanita MC-180MA Multi-frequency Body Composition Analyzer
Indications for Use:
The Tanita Body Composition Analyzer is indicated for use in the measurement of weight and impedance, and the estimation of body mass index (BMI), total body and segmental fat percent and weight, total body water percent and weight, intracellular and extracellular water weight, total body and segmental muscle mass, physique rating, bone mass, visceral fat rating with healthy range, basal metabolic rate (BMR), and fat free mass (FFM), using BIA (Bioelectrical Impedance Analysis).
The device is indicated for use for healthy children 5–17 years old and healthy adults with active, moderately active, to inactive lifestyles.
For subjects 17 years old and younger, only fat % is displayed.
(PLEASE DO NOT WRITE BELOW THIS LINE—CONTINUE ON ANOTHER PAGE IF NEEDED) Concurrence of CDRH, Office of Device Evaluation (ODE)
Prescription Use (Per 21 CFR §801.109) OR Over-the-counter _____________________________________________________________________________________________________________________________________________________________ ×
hory In Whang
§ 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.