K182548 · Tianjin Medis Medical Device Co., Ltd. · BSK · Jan 25, 2019 · Anesthesiology
Device Facts
Record ID
K182548
Device Name
Accucuff Cuff Pressure Indicator
Applicant
Tianjin Medis Medical Device Co., Ltd.
Product Code
BSK · Anesthesiology
Decision Date
Jan 25, 2019
Decision
SESE
Submission Type
Traditional
Regulation
21 CFR 868.5750
Device Class
Class 2
Attributes
Pediatric
Indications for Use
The Accucuff Cuff Pressure Indicator is intended to monitor intra-cuff pressures of endotracheal, supraglottic airways or tracheostomy tubes. The device is indicated for the patients from pediatric to adult who have an artificial airway and for which the user would like to monitor cuff pressure.
Device Story
Accucuff Cuff Pressure Indicator monitors intra-cuff pressure of artificial airways (endotracheal, supraglottic, tracheostomy). Device features color-coded zones indicating normal, negative, and positive pressure ranges; internal black marker moves in response to pressure changes. Available in three models (10-20 cmH2O, 20-29 cmH2O, 40-60 cmH2O) to accommodate pediatric to adult populations. Used in clinical settings under medical supervision. Healthcare providers observe the position of the black marker relative to color-coded zones to assess cuff pressure status. Proper monitoring helps maintain appropriate cuff pressure, potentially reducing risks associated with over-inflation or under-inflation of artificial airways.
Clinical Evidence
No clinical data. Bench testing only. Testing included conical fitting performance, pressure accuracy, repeatability, temperature exposure, simulated transportation, package integrity, and accelerated aging. Biocompatibility testing performed per ISO 10993-1, -5, and -10.
Technological Characteristics
Materials: Polycarbonate (PC) and Silicone. Sensing: Mechanical pressure indicator with moving black marker. Energy: None (passive). Connectivity: Standalone. Sterilization: EO (10^-6). Standards: ISO 594-1 (conical fittings), ISO 10993 (biocompatibility), ASTM F88/F88M (seal strength), ASTM F1929 (seal leaks).
Indications for Use
Indicated for pediatric to adult patients with an artificial airway (endotracheal, supraglottic, or tracheostomy) requiring cuff pressure monitoring.
Regulatory Classification
Identification
An inflatable tracheal tube cuff is a device used to provide an airtight seal between a tracheal tube and a patient's trachea.
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Tianjin Medis Medical Device Co., Ltd. % Diana Hong General Manager Mid-Link Consulting Co., Ltd P.O. Box 120-119 Shanghai, China, 200120
Re: K182548
Trade/Device Name: Accucuff Cuff Pressure Indicator Regulation Number: 21 CFR 868.5750 Regulation Name: Inflatable Tracheal Tube Cuff Regulatory Class: Class II Product Code: BSK Dated: September 7, 2018 Received: September 17, 2018
Dear Diana Hong:
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 mav, 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 avare 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
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requirements, including, but not limited to: registration and listing (21 CFR Part 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.html; good manufacturing practice requirements as set forth in the quality systems (OS) 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 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 (DICE@fda.hhs.gov) or phone (1-800-638-2041 or 301-796-7100).
Sincerely.
# Todd D. Courtney -S
for Tina Kiang, Ph.D. Acting Director Division of Anesthesiology, General Hospital, Respiratory, Infection Control, and Dental Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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### Indications for Use
510(k) Number (if known) K182548
Device Name Accucuff Cuff Pressure Indicator
#### Indications for Use (Describe)
The Accucuff Cuff Pressure Indicator is intended to monitor intra-cuff pressures of endotracheal, supraglottic airways or tracheostomy tubes. The device is indicated for the patients from pediatric to adult who have an artificial airway and for which the user would like to monitor cuff pressure.
| Type of Use (Select one or both, as applicable) | |
|----------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------|
| <div> <span> <b> × </b> </span> <span>Prescription Use (Part 21 CFR 801 Subpart D)</span> </div> | |
| | <div> <span>Over-The-Counter Use (21 CFR 801 Subpart C)</span> </div> |
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## 510(k) Summary
This 510(k) Summary is being submitted in accordance with requirements of Title 21, CFR Section 807.92.
The assigned 510(k) Number: K182548
- 1. Date of Preparation: 12/26/2018
- 2. Sponsor Identification
#### Tianjin Medis Medical Device Co., Ltd.
No.15-A, Saida One Avenue, Xiqing Economic Development Area, Tianjin, P.R. China
Establishment Registration Number: 3004992992
Contact Person: Yongzhi Wu Position: Quality Manager Tel: +86- 13920213115 Fax: +86-22- 83988486 Email: wuyongzhi3115@126.com
- Designated Submission Correspondent 3.
Ms. Diana Hong (Primary Contact Person) Ms. Ying Xu (Alternative Contact Person)
Mid-Link Consulting Co., Ltd P.O. Box 120-119, Shanghai, 200120, China
Tel: +86-21-22815850, Fax: 360-925-3199 Email: info@mid-link.net
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#### 4. Identification of Proposed Device
Trade Name: Accucuff™ Cuff Pressure Indicator Common Name: Cuff Pressure Indicator
#### Regulatory Information
Classification Name: Cuff, Tracheal Tube, Inflatable Classification: II; Product Code: BSK Regulation Number: 21CFR 868.5750 Review Panel: Anesthesiology
#### Device Description
The Accucuff™ Cuff Pressure Indicator is intended to monitor the cuff pressure of endotracheal, supraglottic airways or tracheostomy tubes. It is designed with different color coded zones to indicate the normal, negative and positive pressure. The black marker on the device will be moved when the cuff pressure is changed. The device is available in 10-20 cmH2O, 20-29 cmH2O and 40-60 cmH2O three different models to accommodate the intended populations from pediatric to adult.
Intended Use Statement:
The Accucuff™ Cuff Pressure Indicator is intended to monitor intra-cuff pressures of endotracheal, supraglottic airways or tracheostomy tubes. The device is indicated for the patients from pediatic to adult who have an artificial airway and for which the user would like to monitor cuff pressure.
- న. Identification of Predicate Devices
Predicate Device 1 510(k) Number: K142103 Trade Name: Cuff Pilot™
Predicate Device 2 510(k) Number: K102704 Trade Name: Easy Cuff™
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| | Table 1 Comparison of Technology Characteristics |
|--|--------------------------------------------------|
| | |
| Item | Proposed Device | Predicate Device 1 | Predicate Device 2 | method | pressure | | pressure |
|----------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|------------------------------------------|---------------------------------|----------------------|---------------------|
| Product Code | BSK | K142103 | K102704 | Types of airways to which it can be used | Supraglottic airway | Supraglottic airway | Supraglottic airway |
| Regulation Number | 868.5750 | 868.5750 | 868.5750 | | Endotracheal tube | | Endotracheal tube |
| Class | CLASS II | CLASS II | CLASS II | | Tracheostomy tube | | Tracheostomy tube |
| Intended Use | The AccucuffTM Cuff Pressure Indicator is intended to monitor intra-cuff pressures of endotracheal, supraglottic airways or tracheostomy tubes. The device is indicated for the patients from pediatric to adult who have an artificial airway and for which the user would like to monitor cuff pressure. | To monitor intra-cuff pressures of supraglottic airways<br>Patient population:<br>Patients who have an artificial airway and for which the user would like to monitor cuff pressure, pediatric to adult.<br>Environment of Use<br>To be used under medical supervision in hospitals, pre-hospital (EMS), extended care facilities and outpatient clinics, where a patient may have an artificial airway. It may also be used in MRI suites when attached to airways that are MR conditional or MR Safe. | To inflate cuffs and to measure and monitor intra-cuff pressures of endotracheal, supraglottic airways, or tracheostomy tubes.<br>Patient population:<br>Patient who are intubated.<br>Environment of use<br>To be used under medical supervision in hospitals, pre-hospital (EMS), extended care facilities and outpatient clinics, where a patient may be intubated | Sterile | EO sterilization, 10-6 | Non-sterile, sterile | Non-sterile |
| Range of measured pressure | AC0100P: 10~20cm H2O<br>AC0100B: 20~29cm H2O<br>AC0100R: 40~60cm H2O | 0~80cm H2O | 0~30cm H2O | Single Use | Single Use | Single Use | Single Use |
| Pressure accuracy | 10~20cm H2O :+/-2cm H2O<br>20~29cm H2O: +/-2cm H2O<br>40~60cm H2O: +/-4cm H2O | +/-5cm H2O up to 80cm H2O | +/-5% H2O up to 30cm H2O<br>+/-0.5cm H2O up @ 10cm H2O<br>+/-1cm H2O up @ 20cm H2O<br>+/-1.5cm H2O up @ 30cm H2O | Material | Polycarbonate (PC);<br>Silicone | Unknown | Unknown |
| Pressure indication | Black mark that move with changes in | Bellows that move with changes in pressure | Bellows that move with changes in | Biocompatibility | | | |
| Cytotoxicity | No cytotoxicity | Conform with ISO 10993 requirements | Conform with ISO 10993 requirements | | | | |
| Skin Sensitization | No skin sensitization | | | | | | |
| Irritation | No irritation | | | | | | |
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Intended Use
The proposed device has the indication of monitoring in endotracheal and trachestomy in addition to monitoring the pressure of supraglotic airway compared with the predicate device K142103. However, the two additional indications are covered by predicate device K102704. Therefore, this difference does not raise different safety and effectiveness questions.
#### Pressure Range
The range of measured pressure for proposed devices individually compared. The proposed device is available in three different pressure ranges. However, pressure range compared with the specifications of the predications of the predicates cleared previously.
#### Pressure Accuracy
The pressure accuracy for proposed devices. Although the pressure accuracy for prossure accuracy for proposed device is less than
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predicate device K102704, the proposed device has a more than predicate device K142103. Therefore, the accuracy difference does not raise different safety and effectiveness questions.
#### Airway Type
The type of airway for which the proposed device is different from predicate device K142103. The proposed device has the additional airway of monitoring endotracheal tube and tracheostomy tube which are identical to predicate device K102704.
#### Sterilization
The proposed device is provided sterile which is different from the sterilization method is established and validated per ISO 11135, which ensures the effectiveness of sterilization.
#### Material
The biocompatibility test (per ISO 10993) has been performed on the results do not show any adverse effect, which demonstrates biocompatibility of the proposed device.
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- Non-Clinical Test Summary 6.
Non-clinical tests were conducted to verify that the proposed device met all the design specifications to establish Substantial Equivalence (SE) with the predicate devices. Test items include:
Conical fitting Performance Test Pressure Accuracy Test Repeatability Pressure Accuracy Test Pressure Accuracy Test exposure to cold and hot temperature Simulated Transportation Test Package Integrity Test Pressure Accuracy and Package Integrity after Accelerated Aging
The test results demonstrate that the proposed device complies with the following standards:
- A ISO 594-1:1986 Conical fittings with a 6% (Luer) taper for syringes, needles and certain other medical equipment-Part 1: General requirement
- > ISO 10993-1:2009 Biological evaluation of medical devices - Part 1: Evaluation and testing within a risk management process
- > ISO 10993-5:2009 Biological evaluation of medical devices -- Part 5: Tests for In Vitro cytotoxicity;
- > ISO 10993-10:2010 Biological evaluation of medical devices - Part 10: Tests for irritation and skin sensitization;
- > ASTM F88/F88M-15 Standard Test Method for Seal Strength of Flexible Barrier Materials.
- > ASTM F1929-15 Standard Test Method for Detecting Seal Leaks in Porous Medical Packaging by Dye Penetration
- 7. Clinical Test Conclusion
No clinical study is included in this submission.
- 8. Substantially Equivalent (SE) Conclusion
Based on the comparison and analysis above, the proposed device is Substantially Equivalent (SE) to the predicate devices.
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.