The Youha electric breast pump is intended to be used by lactating women to express and collect milk from their breasts. It is intended for a single user.
Device Story
Youha electric breast pump is a single-user, powered device for lactating women to express and collect breast milk. It utilizes a microprocessor-controlled reciprocating diaphragm vacuum pump to generate suction up to 280mmHg. The device features three operational modes: massage (fast cycles, low vacuum), low expression (slow cycles, high vacuum), and high expression (slower cycles, higher vacuum). Users interact with the device via a front panel keypad and LCD display to select modes and adjust vacuum pressure. It is powered by an internal rechargeable battery or an external AC/DC adapter. The device is intended for home use by the patient. Output consists of expressed milk collected into a container. The device includes backflow protection to prevent milk contamination.
Clinical Evidence
No clinical data. Substantial equivalence is supported by bench testing, including electrical safety (IEC 60601-1), electromagnetic compatibility (IEC 60601-1-2), home-use safety (IEC 60601-1-11), and biocompatibility (ISO 10993). Performance testing verified vacuum levels, cycle rates, and backflow protection across all power sources and pumping configurations.
Technological Characteristics
Powered by internal rechargeable battery or AC/DC adapter. Diaphragm vacuum pump controlled by a microprocessor. User interface includes LCD and keypad. Biocompatibility per ISO 10993. Electrical safety per IEC 60601-1, IEC 60601-1-2, and IEC 60601-1-11. Software developed per IEC 62304.
Indications for Use
Indicated for lactating women to express and collect breast milk. Intended for single-user use.
Regulatory Classification
Identification
A powered breast pump in an electrically powered suction device used to express milk from the breast.
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Food and Drug Administration 10903 New Hampshire Avenue Document Control Center - WO66-G609 Silver Spring, MD 20993-0002
July 31, 2017
Ningbo Youhe Electrical Appliance Technology Co., Ltd. % Daniel Qiu Project Manager Shanghai Qisheng Business Consulting Co.,ltd. Room 1301, Bld 46, Jing Gu Zhong Rd., No.58, Min Hang District, Shanghai, CN Shanghai, 200240 China
Re: K163136 Trade/Device Name: Youha electric breast pump, Models: YH-8004, YH-8016, YH-8006IV, YH-8015 Regulation Number: 21 CFR& 884.5160 Regulation Name: Powered Breast Pump Regulatory Class: II Product Code: HGX Dated: June 22, 2017 Received: June 22, 2017
Dear Daniel Qiu:
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.
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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 (reporting of medical devicerelated 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 contact the Division of Industry and Consumer Education at its toll-free number (800) 638-2041 or (301) 796-7100 or at its Internet address
http://www.fda.gov/MedicalDevices/ResourcesforYou/Industry/default.htm. 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.
You may obtain other general information on your responsibilities under the Act from the Division of Industry and Consumer Education at its toll-free number (800) 638-2041 or (301) 796-7100 or at its Internet address
http://www.fda.gov/MedicalDevices/ResourcesforYou/Industry/default.htm.
Sincerely,
Joyce M. Whang -S
for
Benjamin R. Fisher, Ph.D. Director 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
510(k) Number (if known) K163136
### Device Name
Youha electric breast pump, Models: YH-8004, YH-8016, YH-8006IV, YH-8015
Indications for Use (Describe)
The Youha electric breast pump is intended to be used by lactating women to express and collect milk from their breasts. It is intended for a single user.
| Type of Use (Select one or both, as applicable) |
|-------------------------------------------------|
|-------------------------------------------------|
| | Prescription Use (Part 21 CFR 801 Subpart D)
|X | Over-The-Counter Use (21 CFR 801 Subpart C)
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# 510(k) Summary
# K163136
#### 1. Submitter Information
| Name: | Ningbo Youhe Electrical Appliance Technology Co., Ltd |
|------------|------------------------------------------------------------------------|
| Address: | No.226-228 San Jiao Tian Road, Fu Hai Town, CiXi City, Zhejiang, China |
| Telephone: | +86-574-63860315 |
| Fax: | +86-574-23660066 |
Contact Person: Huang Yun Jun
- 2. Date Prepared: June 30, 2017
#### 3. Device Information
| Trade Name: | Youha electric breast pump |
|--------------------|--------------------------------------|
| Common Name: | Powered breast pump |
| Models: | YH-8004, YH-8016, YH-8006IV, YH-8015 |
| Regulation Class: | Class II |
| Regulation Number: | 21CFR 884.5160, Powered breast pump |
| Review Panel: | Obstetrics/Gynecology |
| Product Code: | HGX (pump, breast, powered) |
#### 4. Predicate Device
K162415 510(k): Device Name: Spectra 9 Plus powered breast pump Manufacturer: Uzinmedicare Company
#### 5. Device Description
The Youha electric breast pump is a single-user, powered breast pump intended to be used by lactating women to express and collect milk from their breasts. YH-8004 and YH-8016 have both single (pumping from one breast) and double pumping (pumping from both breasts) configurations. YH-8006IV and YH-8015 have a single pumping configuration only.
A reciprocating diaphragm vacuum pump, driven by a microprocessor, generates the suction to extract the milk at vacuum levels up to 280mmHg. The user interface consists of a front panel keypad and LCD display in which the user switches between modes and controls the vacuum pressure.
The device has three modes of operation:
- . Massage mode: Suction patterns with fast cycles and low vacuum to start milk flowing
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- Low expression mode: Suction patterns with slow cycles and high vacuum to . express more milk gently and efficiently.
- High expression mode: Suction patterns with slower cycles and higher vacuum to . express more milk efficiently.
YH-8004, YH-8015 and YH-8016 have 3 modes including massage mode, low expression mode and high expression mode. YH-8006IV has 2 modes including massage mode and high expression mode.
The device is electrically powered from either an internal rechargeable battery or an external AC power adapter. The external adapter also charges the battery.
#### 6. Indications for Use
The Youha electric breast pump is intended to be used by lactating women to express and collect milk from their breasts. It is intended for a single user.
#### 7. Predicate Comparison
The following table compares the Youha Electric breast pump to the predicate device with respect to indications for use and technological characteristics:
| Device & Predicate Device(s): | Subject Device: | Predicate Device: |
|----------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------|
| | Youha electric breast pump<br>K163136 | Spectra 9plus<br>K162415 |
| Indications for Use | The Youha electric breast pump is<br>intended to be used by lactating women<br>to express and collect milk from their<br>breasts. It is intended for a single user. | The Spectra 9Plus is a single-user,<br>powered breast pump intended to<br>express and collect milk from the<br>breasts of lactating women. |
| Single user | Yes | Yes |
| Provided Non-sterile | Yes | Yes |
| Re-usable | Yes | Yes |
| Direct user contact | Yes | Yes |
| Power source | AC/DC wall converter and<br>Rechargeable | Power source |
| Suction Strength (Expression<br>Mode) (mmHg) | Low<br>YH-8004:75-250<br>YH-8016:75-250<br>YH-8015:115-250<br>YH-8006IV:N/A | 50-270 |
| | High<br>YH-8004:120-280<br>YH-8016:120-280<br>YH-8015: 120-280<br>YH-8006IV:125-<br>280 | |
| Suction Strength (Massage<br>Mode) (mmHg) | YH-8004:34-190<br>YH-8016:34-190<br>YH-8015: 50-190<br>YH-8006IV: 50-190 | 50-150 |
| Adjustable Suction levels | Yes | Yes |
| Suction Settings (High/low | YH-8004:6 | 10 |
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| Expression Mode) | YH-8016:6 | | |
|--------------------------------------------|--------------|------------------------------------------------|---------------------------|
| | YH-8015:9 | | |
| | YH-8006IV:10 | | |
| Suction Settings (Massage Mode) | YH-8004:6 | 5 | |
| | YH-8016:6 | | |
| | YH-8015:9 | | |
| | YH-8006IV:10 | | |
| Cycle Speed (Expression Mode) (cycles/min) | Low | YH-8004:41-69 | 24-60 |
| | | YH-8016:41-69 | |
| | | YH-8015:36-60 | |
| | | YH-8006IV:N/A | |
| | High | YH-8004:16-33 | |
| | | YH-8016:16-33 | |
| | | YH-8015:16-34 | |
| | | YH-8006IV:32-57 | |
| Cycle Speed (Massage Mode) | | YH-8004:94-113 | 70 |
| | | YH-8016:94-113 | |
| | | YH-8015:80-122 | |
| | | YH-8006IV:71-100 | |
| Backflow Protection | | Yes | Yes |
| Single or Double Pumping | | YH-8004/ YH-8016: Single and Double<br>Pumping | Single and Double Pumping |
| | | YH-8006IV/YH-8015:Single Pumping<br>Only | |
| Visual Indicator | | LCD | LCD |
| Pump Type | | Diaphragm | Diaphragm |
The Youha electric breast pump has the same intended use but different technological characteristics compared to the predicate device. The differences in technological characteristics do not raise different questions of safety and effectiveness.
#### 8. Non-Clinical Performance Testing
Non-clinical tests were conducted to verify that the Youha electric breast pump met all design specifications and is substantially equivalent to the predicate. The test results demonstrated that the proposed device complies with the following standards:
- Risk Analysis developed in accordance with ISO 14971:2007.
- Electrical Safety Testing in accordance with IEC 60601-1:2005 (3m Edition) with US ● deviations per AAMI/ANSI ES 60601-1:2005/(R)2012 and A1:2012.
- Electromagnetic Compatibility Testing in accordance with IEC 60601-1-2:2014.
- . Safety Testing for use in the home in accordance with IEC 60601-1-11:2015.
- Biocompatibility Tests in accordance with ISO-10993, including cytotoxicity (ISO 10993-5:2009), sensitization (ISO 10993-10:2010) and irritation (ISO 10993-10:2010).
- Software Validation Software Life Cycle Processes in accordance with IEC 62304. ●
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- . FDA's Guidance Document "Guidance for the Content of Premarket Submissions for Software Contained in Medical Devices." (May 11, 2005).
Performance testing was conducted at minimum and maximum vacuum settings to determine the minimum and maximum vacuum levels of the pump as compared to its specifications. The specifications were met for vacuum level, cycle rate, and backflow protection. These results held under conditions of single and double pumping mode with varying power sources (e.g., AC/DC power vs. battery power).
#### Clinical Performance Data 9.
Not Applicable
#### 10. Conclusion
Based on the comparison and analysis above, the Youha electric breast pump is substantially equivalent to the predicate device.
Two short videos show you everything — or skip straight to the written tutorial if you'd rather read. You can reopen this any time from the Tutorial button in the top bar.
Part 1 — Search, results, and everyday workflows 16 min
Part 2 — Embeddings: the galaxy map 3 min
1. Search: exact and fuzzy
Type a phrase like "coronary artery calcification" into the search box. You get two kinds of results. Exact results match the literal phrase — prefix searches work ("coronary artery calcificati") but suffix searches do not. Fuzzy results match on the meaning and intent of your phrase rather than the exact words, and are sorted by relevance score. Hover over the Exact or Fuzzy badge on any row to see exactly why it matched.
Use the checkboxes above the results to narrow: SaMD keeps only software-only devices, AI / ML keeps only devices with AI.
Exact vs. fuzzy search: what's the difference?
Exact matches on the literal phrase (prefix search works, suffix does not). Fuzzy matches on the meaning and intent of the phrase rather than the exact words. Hover over the badge on any row to see why it matched.
You search "coronary artery calcification" and want only software devices with AI. What two filters do you apply?
Narrow by SaMD (software-only devices), then narrow by AI/ML (devices with AI).
2. The results table
Scroll right in the results table. The intended use is extracted for you — no need to open the PDF. The device story gives a high-level snapshot of what the device does and how it's used. The AI Performance sub-table shows each output name, acceptance criteria, observed values, and development/test dataset descriptions — the same format Innolitics uses for regulatory strategy outputs, and the fastest high-level fingerprint of an AI device. It is AI-generated but has been very reliable in practice.
Where do you find a device's intended use without opening the PDF?
Scroll right in the search results table. The intended use column is extracted for you; no need to dig into the 510(k) summary PDF.
What does the AI Performance sub-table show, and why is it useful?
Output name, acceptance criteria, observed values, development dataset description, and test dataset description. It's the same format we use for regulatory strategy output and Fast 510(k) input, and the fastest high-level fingerprint of an AI device. AI-generated but reliable in practice.
3. Judging fuzzy relevance
Fuzzy results trail off in relevance as you scroll. Use three signals to decide how far down to go: the fuzzy badge explanations, the intended use column, and whether your target output (e.g., Cobb angle) still appears in the AI Performance sub-table. Once it stops appearing, you're past the relevant zone. A top hit with a low score (~0.4) and a stretched explanation is a hint the closest predicates are far away — the project may be headed for De Novo. Note the fuzzy search is a pattern match: it doesn't handle negation ("not") well, and hardware devices can appear — filter by SaMD/AI ML to cut them.
How do you judge how far down fuzzy search results to go?
Use the relevancy signals: the fuzzy badge explanations, the intended use column, and whether the target output (e.g., Cobb angle) still appears in the AI Performance sub-table. Once it stops appearing, results are trailing off in relevancy.
4. Device detail page: chat and citations
Click a device name to open its detail page: device facts on the left, a chat window on the right. Ask something like "Describe the training data". The answer carries little citation bubbles — click one to jump to the highlighted passage in the source PDF, so you can verify every AI answer against the document. There's also a Download PDF button for sharing.
How do you verify an AI chat answer on the device detail page?
Click the citation bubbles to jump to the relevant highlight in the source document.
Reading rule for every project: how many summaries do you read in full?
At least the three most relevant 510(k) or De Novo summaries, in full. After that, use targeted chat questions to confirm your memory quickly. The tool supports this professional habit — it doesn't replace it.
5. Side-by-side comparison
Select multiple rows in the results table (aim for under ~10), then open the PDF Viewer tab. Ask one question — it goes to all selected devices in parallel, each with citations. This is the fastest way to compare and contrast devices: training data, PCCP scope, how they handled adding new scanners, and so on.
What does the side-by-side PDF viewer mode do?
Select multiple devices, open the PDF viewer tab, and ask one question (e.g., "Describe the training data"). It queries all selected devices simultaneously with citations, so you can compare and contrast quickly.
6. Collections
With rows selected, go to the Collections tab and create a labeled collection (e.g., "Cobb Angle Project"). Reload that selection any time — before a client call, pull up the collection and ask questions across all of its devices at once.
How do you save a set of selected devices for later use?
Select the rows, go to the Collections tab, and create a labeled collection (e.g., "Cobb Angle Project"). You can reload the selection anytime and carry it into the PDF viewer and other tabs that support selections.
7. Product codes and the regulations tree
Click a product code in the results to jump to it in the regulations tree — identification text, sibling product codes, and devices you can open in a PDF viewer on the right. Click a regulation number to see its identification, special controls, and related product codes. You can also search by product code or regulation number at the top of the tree. Always read the special controls if any exist for your device — it broadens your search and sharpens pre-kickoff research.
What can you do from the regulations tree view?
Browse product codes and regulation numbers, read the identification text and special controls, browse sibling product codes, open device PDFs on the right, and search by product code or regulation number at the top of the tree.
8. Chart view
Click Show Chart and segment by regulation number (or product code) to see which regulations dominate your result set. Clicking a regulation takes you into the regulations tree. Great for spotting that most matches are, say, hardware laparoscopic devices — a cue to go back and filter.
How do you see which regulations dominate a search result set?
Click "Show Chart" and segment by Regulation Number. Clicking a regulation takes you to the regulations tree.
9. The predicate graph
Open the Predicates tab for a family-tree view of predicate relationships. Click a node to trace its parents and children; selections from search carry over pre-selected. Commonly predicated devices are worth reading — a lot of people predicated them for a reason. The visual lineage is also handy on client calls, e.g. to show how a predicate family evolved and justify why your predicate still holds.
In the predicate graph, why are commonly predicated devices worth reading?
A lot of people predicated them for a reason. Clicking a node traces parents and children, and selections from search carry over pre-selected.
10. Embeddings: the galaxy map
The Embeddings tab plots every matching document in a 2-D "galaxy map" where semantically similar devices cluster together. Hover or click clusters to explore, and let AI label the clusters for you. Embeddings beat product codes for grouping: two devices can carry different product codes (LLZ vs. QIH) yet do the same thing — the embedding captures the meaning of the intended use and device story. This is also exactly how retrieval-augmented generation (RAG) works under the hood, and it makes a great visual on client calls.
Try it yourself
Head to the search page and work through a few of these AI/ML fuzzy searches to build intuition: perivascular fat on CT · aortic valve calcification opportunistic screening on noncontrast CT · breast cancer prediction on digital pathology slides · autism detection · gestational age prediction · a hearing aid that can also detect a pulse · foundation model based analysis of ECG · large language models · penetration test. Watch how the relevance scores, intended use, and AI Performance tables tell you when results stop being meaningful.