External Drainage System allows for drainage of cerebrospinal fluid (CSF) from the lateral ventricles of the brain and the lumbar subarachnoid space in selected patients to reduce intracranial pressure (ICP).
Device Story
External Drainage System (EDS) provides closed-system drainage of cerebrospinal fluid (CSF) from brain ventricles or lumbar subarachnoid space. Device components include tubing, 3-way stopcock with injection/sample ports, male luer connector, anti-reflux valve, drip chamber with scale plate, and drainage bag with hydrophobic membrane. System connects to a separately provided drainage catheter via luer connection. Used in clinical settings to manage intracranial pressure by collecting CSF in a drainage bag. Operation is manual; healthcare providers monitor drainage levels via the drip chamber scale. Benefits include controlled CSF removal to alleviate elevated intracranial pressure.
Clinical Evidence
No clinical data. Substantial equivalence supported by bench testing and biocompatibility evaluation. Bench testing verified device size, fluid leakage (pressure decay), drip chamber volume/scale accuracy, air vent filter integrity, and packaging/sterility. Biocompatibility testing (ISO 10993-1) confirmed non-cytotoxic, non-sensitizing, non-irritant, non-toxic, non-pyrogenic, and non-hemolytic status for prolonged contact (>24h to 30 days) with CSF.
Technological Characteristics
Externally communicating device for prolonged contact (>24h to 30 days) with CSF. Materials: PVC (tubing), Polycarbonate (stopcock, luer, anti-reflux valve). Components: tubing, 3-way stopcock, drip chamber, drainage bag with hydrophobic vent. Sterilization: Ethylene Oxide (SAL 10^-6). Standalone mechanical system; no energy source or software.
Indications for Use
Indicated for drainage of CSF from lateral ventricles or lumbar subarachnoid space in patients requiring reduction of intracranial pressure (ICP).
Regulatory Classification
Identification
A central nervous system fluid shunt is a device or combination of devices used to divert fluid from the brain or other part of the central nervous system to an internal delivery site or an external receptacle for the purpose of relieving elevated intracranial pressure or fluid volume (e.g., due to hydrocephalus). Components of a central nervous system shunt include catheters, valved catheters, valves, connectors, and other accessory components intended to facilitate use of the shunt or evaluation of a patient with a shunt.
Predicate Devices
MoniTorr ICP™ External CSF Drainage and Monitoring System; LimiTorr™ Volume Limiting External CSF Drainage and Monitoring System (K191684)
Submission Summary (Full Text)
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February 9, 2023
JMED(Shenzhen) Technology Limited Anna Xiao Regulatory Specialist 7#401, Zhongxing Road, Xiuxin Community, Kengzi Street, Pingshan District Shenzhen City, Guangdong 518122 China
Re: K221694
Trade/Device Name: External Drainage System Regulation Number: 21 CFR 882.5550 Regulation Name: Central Nervous System Fluid Shunt And Components Regulatory Class: Class II Product Code: JXG Dated: January 10, 2023 Received: January 10, 2023
Dear Anna Xiao:
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. Although this letter refers to your product as a device, please be aware 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
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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) for devices or postmarketing safety reporting (21 CFR 4, Subpart B) for combination products (see https://www.fda.gov/combination-products/guidance-regulatory-information/postmarketing-safety-reportingcombination-products); good manufacturing practice requirements as set forth in the quality systems (QS) 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 https://www.fda.gov/medical-device-safety/medical-device-reportingmdr-how-report-medical-device-problems.
For comprehensive regulatory information about medical devices and radiation-emitting products, including information about labeling regulations, please see Device Advice (https://www.fda.gov/medicaldevices/device-advice-comprehensive-regulatory-assistance) and CDRH Learn (https://www.fda.gov/training-and-continuing-education/cdrh-learn). 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 (https://www.fda.gov/medical-device-advice-comprehensive-regulatoryassistance/contact-us-division-industry-and-consumer-education-dice) for more information or contact DICE by email (DICE@fda.hhs.gov) or phone (1-800-638-2041 or 301-796-7100).
Sincerely,
Digitally signed by Adam D. Adam D. Pierce -S Date: 2023.02.09 Pierce -S 17:41:33 -05'00'
Adam D. Pierce, Ph.D. Assistant Director DHT5A: Division of Neurosurgical, Neurointerventional and Neurodiagnostic Devices OHT5: Office of Neurological and Physical Medicine Devices Office of Product Evaluation and Quality Center for Devices and Radiological Health
Enclosure
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# Indications for Use
510(k) Number (if known) K221694
Device Name External Drainage System
Indications for Use (Describe)
External Drainage System allows for drainage of cerebrospinal fluid (CSF) from the lateral ventricles of the brain and the lumbar subarachnoid space in selected patients to reduce intracranial pressure (ICP).
Type of Use (Select one or both, as applicable)
X Prescription Use (Part 21 CFR 801 Subpart D)
| Over-The-Counter Use (21 CFR 801 Subpart C)
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# 510(k) SUMMARY
#### Submission Sponsor 1
JMED (Shenzhen) Technology Limited 7#401, Zhongxing Road No.14, Xiuxin Community, Kengzi Street, Pingshan District, Shenzhen City, Guangdong, 518122, P. R. China Tel: 86-755-84513706 Email: registration(@jmedtech.com.cn
#### 2 Submission Correspondent
Anna Xiao Regulatory Specialist JMED(Shenzhen) Technology Limited 7#401, Zhongxing Road No.14, Xiuxin Community, Kengzi Street,Pingshan District, Shenzhen City, Guangdong, 518122, P. R. China Tel: 86-755-84513706 Tel: 0086-13670075972 Email: yu.xiao(@jmedtech.com.cn
#### 3 Date Prepared
February 6, 2023
#### 4 Device Identification
Trade Name: External Drainage System Common Name: External Drainage System Regulation Name: Central Nervous System Fluid Shunt and Components Device Regulation: 21 CFR 882.5550 Device Classification: Class II Product Code: JXG
#### 5 Predicate Device
510(k) Number: K191684 Trade Name: MoniTorr ICP™ External CSF Drainage and Monitoring System; LimiTorr™ Volume Limiting External CSF Drainage and Monitoring System
#### 6 Device Description
The External Drainage System includes a tubing, drainage bag, drip chamber and scale plate. It is provided sterile and can be connected to a drainage catheter, which is connected to a patient line, via a luer connection and ultimately to a drainage bag. The drainage catheter is not included in the subject device. The External Drainage System
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provides a closed system for the drainage of cerebrospinal fluid (CSF) from the ventricles of the brain or the lumbar subarachnoid space. During the draining, the cerebrospinal fluid will be collected in a drainage bag.
#### 7 Indications For Use
External Drainage System allows for drainage of cerebrospinal fluid (CSF) from the lateral ventricles of the brain and the lumbar subarachnoid space in selected patients to reduce intracranial pressure (ICP).
#### 8 Substantial Equivalence Discussion
Table 1 Comparisons between the subject device and the predicate device.
| Table 1 General Comparison | | | |
|------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------|
| Item | Predicate Device<br>(K191684) | Subject Device<br>(K221694) | Comments |
| | MoniTorr ICP™ External CSF Drainage and Monitoring System;<br>LimiTorr™ Volume Limiting External CSF Drainage and<br>Monitoring System | External Drainage System | |
| Indications<br>for Use (IFU) | The MoniTorr ICP™ system<br>allows for drainage and monitoring<br>of CSF from the lateral ventricles<br>of the brain and the lumbar<br>subarachnoid space in selected<br>patients to reduce intracranial<br>pressure (ICP), to monitor CSF, to<br>provide temporary drainage of CSF<br>in patients with infected CSF<br>shunts, and the monitoring of ICP.<br><br>The LimiTorr™ system allows for<br>drainage and monitoring of CSF<br>from the lateral ventricles of the<br>brain and the lumbar subarachnoid<br>space in selected patients to reduce<br>intracranial pressure (ICP), to<br>monitor CSF, to provide temporary<br>drainage of CSF in patients with<br>infected | External Drainage System<br>allows for drainage of<br>cerebral spinal fluid (CSF)<br>from the lateral ventricles of<br>the brain and the lumbar<br>subarachnoid space in<br>selected patients to reduce<br>intracranial pressure (ICP) | Similar<br><br>The IFU of<br>the predicate<br>device<br>contains<br>additional<br>claims not<br>applicable to<br>the subject<br>device. |
| | Predicate Device<br>(K191684) | Subject Device<br>(K221694) | |
| Item | MoniTorr ICP™ External CSF<br>Drainage and Monitoring System;<br>LimiTorr™ Volume Limiting<br>External CSF Drainage and<br>Monitoring System | External Drainage System | Comments |
| Sterility<br>Information | CSF shunts, and to monitor ICP. | | |
| | Provide sterile, single use. EO | Provide sterile, single use, EO | Identical |
| | Sterilized with sterility assurance<br>level (SAL) is $10^{-6}$ | Sterilized with sterility<br>assurance level (SAL) is $10^{-6}$ | |
| | LimiTorr Volume Limiting<br>External CSF Drainage and<br>Monitoring System: | | |
| Device<br>Components | Tubing (Patient line with<br>green strip, stopcock,<br>needleless sampling site). | Patient connection<br>Tubing (3-way stopcock with<br>injection port & sample port,<br>male luer connector, anti-<br>reflux valve, stopcock, female<br>luer connector, drip pot). | Similar<br>The main<br>device<br>components<br>are similar |
| | Drainage bag with an anti-reflux<br>valve, needleless sampling site). | Drainage bag (2-way<br>stopcock, hydrophobic<br>membrane, cord, cord lock). | |
| | Graduated burette<br>(Antimicrobial hydrophobic vent,<br>burette stopcock and blue cap). | Drip chamber with scale<br>plate, 3-way stopcock and<br>tubing. | |
| | MoniTorr ICP External CSF<br>Drainage and Monitoring System: | | |
| | Tuning (patient line with green<br>strip, stopcocks, red end cap,<br>injection site). | | |
| | Drainage bag with injection site<br>and anti-reflux valve. | | |
| | Graduated chamber, microbial<br>filter vent, drip former, pressure<br>level, chamber stopcock, panel<br>and injection site. | | |
| | Pole mount bracket assembly with<br>clamping screw. | | |
| | Predicate Device<br>(K191684) | Subject Device<br>(K221694) | |
| Item | MoniTorr ICP™ External CSF<br>Drainage and Monitoring System;<br>LimiTorr™ Volume Limiting<br>External CSF Drainage and<br>Monitoring System | External Drainage System | Comments |
| Device<br>Materials | The patient line, stopcock,<br>graduated burette and anti-reflux<br>valve may come in indirect contact<br>with the patient:<br>(1) Patient line: Not available<br>(2) Stopcock: HDPE and<br>polycarbonate<br>(3)Graduated burette: Not available<br>(4) Anti-reflux valve: Not available | The tubing ,3-way stopcock,<br>male luer connector and<br>anti-reflux valve may come in<br>indirect contact with the<br>patient:<br>(1) Tubing: PVC<br>(2) 3-way stopcock: PC<br>(3) Male luer connector: PC<br>(4) Anti-reflux valve: PC | Similar |
# Table 1 General Comparison
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The subject and predicate devices have similar intended use, sterilization method and device components. The differences among the devices do not impact the performance of the subject device.
#### 9 Summary of Non-Clinical Performance Testing
The following test were performed to verify that the performance of the subject device is substantially equivalent to the performance of the predicate device. Testing included side-by-side comparison data with the predicate device. Please see the Summary of Testing Table 2 below for test results.
| Test Item | Test Methods | Results |
|--------------------------------------------------------|----------------------------------------------------------------------------------------------------------|---------|
| Device size<br>requirements | To determine if the size of the<br>device components is within<br>specifications. | Pass |
| Fluid leakage by<br>pressure decay test | To establish that the tubing meets<br>fluid leakage specifications. | Pass |
| The volume and<br>scale of the drip<br>chamber | To determine if the volume and<br>scale of the drip chamber is within<br>current specifications. | Pass |
| Integrity of air vent<br>filter of the drip<br>chamber | To determine if the integrity of air<br>vent filter of drip chamber is within<br>current specifications. | Pass |
## Table 2 Performance Bench Test Results
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| Integrity of air vent<br>filter of the drainage<br>bag | To determine if the integrity of air<br>vent filter of drainage bag is within<br>current specifications. | Pass |
|--------------------------------------------------------|----------------------------------------------------------------------------------------------------------|------|
| Packaging integrity | To determine if the packaging<br>integrity is within current<br>specifications. | Pass |
| Package sealing<br>strength | To determine if the sealing strength<br>of the package is within current<br>specifications. | Pass |
| Sterility | To determine if the sterility of the<br>device is within current<br>specifications for ethylene oxide. | Pass |
| Endotoxin testing | To determine if the endotoxin of the<br>device is within specifications of<br>2.15 EU/device. | Pass |
The External Drainage System is categorized as an externally communicating device in prolonged contact (>24 hour to 30 days) with CSF and indirect blood contact. The following test were completed in accordance with FDA biocompatibility guidance "Use of International Standard ISO 10993-1, "Biological evaluation of medical devices - Part 1: Evaluation and testing within a risk management process."
| Test item | Results | Conclusions |
|----------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------------|
| In vitro Cytotoxicity<br>Test | Test article extracts showed no evidence of<br>cytotoxicity. | Non-cytotoxic |
| Skin sensitization tests | Test article extracts showed no evidence of<br>causing skin sensitization in the guinea pig. | Non-sensitizing |
| Intracutaneous<br>reactivity test | The test article extracts showed no evidence of<br>intracutaneous reactivity in rabbit. | Non-irritant |
| Acute systemic toxicity<br>test | The test article extracts showed no evidence of<br>acute systemic toxicity.<br>- No mortality during the study<br>- All animals were clinically normal<br>throughout the study<br>- Body weight data were acceptable | Non-toxic<br>acutely |
| Material mediated<br>pyrogenicity test | The test article met the requirements for the<br>absence of pyrogens. | Non-pyrogenic |
| Table 3 Biocompatibility Test Summary |
|---------------------------------------|
|---------------------------------------|
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| In vitro hemolysis<br>study | Under the conditions of this study, the<br>hemolytic index of test article was 0.8%. | Non-hemolytic |
|-----------------------------|--------------------------------------------------------------------------------------|---------------|
|-----------------------------|--------------------------------------------------------------------------------------|---------------|
## 5.10 Conclusion
The subject and predicate devices have similar indications for use and comparable technological characteristics. The differences in technological characteristics between the subject and predicate devices do not raise different questions on safety and effectiveness. The non-clinical performance data demonstrates that the subject device 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.