Intended for medical purposes to apply static or gentle pressure to prominent regions of an infant's cranium to improve cranial symmetry or shape. To treat infants from three to eighteen months of age with moderate to severe non-synostotic positional plagiocephaly, including plagiocephalic-, brachycephalic-, scaphocephalic-shaped heads.
Device Story
Custom-fabricated cranial remolding orthosis; treats positional plagiocephaly in infants. Input: 3D laser scan of infant cranium. Process: CAD/CAM software modifies scan to create positive mold via routing machine; additive-manufactured thermoplastic resin (nylon polyamide) outer shell attached to polyethylene foam liner. Output: Helmet applying gentle pressure to prominent skull regions while allowing growth in depressed areas. Used in clinical settings by orthotists; worn by infants up to 23 hours/day. Output guides clinical fit and cranial reshaping; benefits patient by correcting skull symmetry.
Clinical Evidence
No clinical data provided. Substantial equivalence supported by non-clinical bench testing, including biocompatibility, tensile strength, drop testing, and chemical testing of the outer shell material, alongside validation of manufacturing geometry and dimensional tolerances.
Technological Characteristics
Cranial orthosis; outer shell of 2mm thermoplastic resin (nylon polyamide); inner liner of 1/2" polyethylene foam. Custom-fabricated via 3D laser scanning and CAD/CAM routing. Fastened with Velcro straps, chafe/loop, and rivets. Biocompatible materials.
Indications for Use
Indicated for infants 3-18 months old with moderate to severe non-synostotic positional plagiocephaly (plagiocephalic, brachycephalic, or scaphocephalic shapes). Contraindicated for infants with synostosis or hydrocephalus.
Regulatory Classification
Identification
A cranial orthosis is a device that is intended for medical purposes to apply pressure to prominent regions of an infant's cranium in order to improve cranial symmetry and/or shape in infants from 3 to 18 months of age, with moderate to severe nonsynostotic positional plagiocephaly, including infants with plagiocephalic-, brachycephalic-, and scaphocephalic-shaped heads.
Special Controls
*Classification.* Class II (special controls) (prescription use in accordance with § 801.109 of this chapter, biocompatibility testing, and labeling (contraindications, warnings, precautions, adverse events, instructions for physicians and parents)).
In addition to the general controls of the act, the Dynamic Orthotic Cranioplasty - DOC™ Band is subject to the following special controls in order to provide reasonable assurance of the safety and effectiveness: (1) The sale, distribution and use of this device are restricted to prescription use in accordance with 21 CFR 801.109. (2) The labeling must include (a) contraindications for the use of the device on infants with synostosis or with hydrocephalus; (b) warnings indicating the need: (i) to evaluate head circumference measurements and neurological status at intervals appropriate to the infant’s age and rate of head growth, and to describe steps that should be taken in order to reduce the potential for restriction of cranial growth and possible impairment of brain growth and development; (ii) to evaluate the skin at frequent intervals, e.g., every three to four hours, and to describe steps that should be taken if skin irritation or breakdown occurs; (c) precautions indicating the need: (i) to additionally treat torticollis, if the positional plagiocephaly is associated with torticollis; (ii) to evaluate device fit and to describe the steps that should be taken in order to reduce the potential for restriction of cranial growth, possible impairment of brain growth and development and skin irritation and/or breakdown; (iii) to evaluate the structural integrity of the device and to describe the steps that should be taken to reduce the potential for the device to slip out of place and cause asphyxiation or trauma to the eyes or skin; (d) adverse events, i.e., skin irritation and breakdown that have occurred with the use of this device; (e) clinician’s instructions for casting the infant, for fitting the device, and for care and use of the device; and (f) parents’ instructions for care and use of the device. (3) The materials must be assessed for biocompatibility with testing appropriate for long term direct skin contact.
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Image /page/0/Picture/0 description: The image shows the logo of the U.S. Food and Drug Administration (FDA). On the left is the Department of Health & Human Services logo. To the right of that is the FDA logo, which is a blue square with the letters "FDA" in white. To the right of the blue square is the text "U.S. FOOD & DRUG ADMINISTRATION" in blue.
July 1, 2022
Symbion Logistics, LLC Roselle Abad Quality Engineer 1119 W Geneva Dr Tempe, Arizona 85281
Re: K203134
Trade/Device Name: Hanger Cranial Band 3D Regulation Number: 21 CFR 882.5970 Regulation Name: Cranial Orthosis Regulatory Class: Class II Product Code: MVA, OAN Dated: September 30, 2021 Received: October 4, 2021
Dear Roselle Abad:
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 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
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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 mediation-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,
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) K203134
Device Name HANGER CRANIAL BAND 3D
### Indications for Use (Describe)
Intended for medical purposes to apply static or gentle pressure to prominent regions of an infant's cranium to improve cranial symmetry or shape. To treat infants from three to eighteen months of age with moderate to severe non-synostotic positional plagiocephaly, including plagiocephalic-, brachycephalic-, scaphocephalic-shaped heads.
Contraindications for use: Infants with synostosis or hydrocephalus.
| Type of Use (Select one or both, as applicable) | |
|------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------|
| <span> <span style="font-size:16px;">☑</span> Prescription Use (Part 21 CFR 801 Subpart D) </span> | <span> <span style="font-size:16px;">☐</span> Over-The-Counter Use (21 CFR 801 Subpart C) </span> |
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# 510(k) Summary K203134
- l. Application Information
- A. Applicant Name and Address
Symbiont Logistics, LLC (dba Hanger Fabrication Network) 302 E University Dr, Suite 301 Phoenix, AZ 85042 T: 480-894-1755 F: 480-921-9686
FDA Establishment Registration Number: 2032381
- B. Submission Correspondent
Roselle Abad Quality Engineer, Hanger Fabrication Network (Symbiont Logistics, LLC) T: 480-894-1755, rabad@hanger.com
- C. Contact Person
Antonio Dias Engineering Director, Hanger Fabrication Network (Symbiont Logistics, LLC) T: 480-894-1755, adias@hanger.com
- D. Summary Date June 27, 2022
#### II. Submission Information
- A. Trade or Proprietary Name:
- B. Common Name:
- C. Regulation Classification:
- D. Regulation Number:
- E. Product Code:
- F. Panel:
- G. Device Class:
- H. Predicate Device 510(k):
Hanger Cranial Band 3D Cranial Orthosis, Helmet Orthosis, Cranial, Laser Scan 882.5970 MVA, OAN Neurology = Hanger Cranial Band, K072566
- lll. Device Description
The Hanger Cranial Band 3D is a cranial remolding orthosis comprised of an additivemanufactured outer shell with a polyethylene foam inner lining.
The device is custom fabricated for individual patients by obtaining measurements via a handheld 3D laser scanner. Clinical measurements of the infant's cranium are taken from the digital file. The scan is then modified utilizing a CAD/CAM technology package—to add or remove material, increase or decrease the circumference of model to aid in fit and
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functionality of the cranial orthosis. The 3D image is used to produce a positive mold using a routing machine, to which the foam liner is pulled onto. The 3D file is also used manufacture the outer shell, which is then attached to the foam-lined positive model.
The completed device applies gentle pressure to the elevated areas of the skull while leaving space for cranial growth in the depressed regions. It is open at one side and closed with a fastener to provide the selected fit and proper stability.
- IV. Indication for Use Statement
Intended for medical purposes to apply static or gentle pressure to prominent regions of an infant's cranium to improve cranial symmetry or shape. To treat infants from three to eighteen months of age with moderate to severe non-synostotic positional plagiocephaly, including plagiocephalic-, brachycephalic-, scaphocephalic-shaped heads.
Contraindications for use: Infants with synostosis or hydrocephalus.
#### V. Substantial Equivalence Discussion
The comparison chart below provides evidence to facilitate the substantial equivalence determination between Hanger Cranial Band 3D to the predicate device, Hanger Cranial Band (K0272566) with respect to intended use, technological characteristics and principles of operation.
| Features | Predicate Device<br>Hanger Cranial Band, K072566 | Proposed Device<br>Hanger Cranial Band 3D |
|--------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Intended Use/<br>Indications for Use | Intended for medical purposes to apply<br>static or gentle pressure to prominent<br>regions of an infant's cranium to improve<br>cranial symmetry or shape. To treat<br>infants from three to eighteen months of<br>age with moderate to severe non-<br>synostotic positional plagiocephaly,<br>including plagiocephalic-, brachycephalic-,<br>scaphocephalic-shaped heads. | Intended for medical purposes to apply<br>static or gentle pressure to prominent<br>regions of an infant's cranium to improve<br>cranial symmetry or shape. To treat infants<br>from three to eighteen months of age with<br>moderate to severe non-synostotic<br>positional plagiocephaly, including<br>plagiocephalic-, brachycephalic-,<br>scaphocephalic-shaped heads. |
| | Contraindications for use: Infants with<br>synostosis or hydrocephalus. | Contraindications for use: Infants with<br>synostosis or hydrocephalus. |
| OTC and/or Rx | Rx | Rx |
| Clinical Population | Infants age 3-18 months | Infants age 3-18 months |
| Daily Wear Time | Up to 23 hrs/day | Up to 23 hrs/day |
| Materials | Outer shell of 5/32" copolymer plastic Inner liner of 1/2" polyethylene foam | Outer shell of 2mm thermoplastic resin, nylon polyamide Inner liner of 1/2" polyethylene foam |
## Table 1 – Comparison of Characteristics
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| | Velcro strap, 1 ½" Chafe and loop, 1 ½" Speedy rivet, 91X | Velcro strap, 1 ½" Chafe and loop, 1 ½" Speedy rivet, 91X |
|------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Production | Measurement of infant's head taken by a 3D scanner from which a 3D image is made. The 3D image is used to produce a positive mold using a routing machine. Form orthosis from the positive mold of infant's head. | Measurement of infant's head taken by a 3D scanner from which a 3D image is made. The 3D image is used to produce a positive mold using a routing machine. Form orthosis from the positive mold of infant's head. |
#### VI. Technological Characteristics
The polyethylene foam liner used in both proposed and predicate devices remains identical-- this is the device component that maintains skin contact during treatment.
Hanger Cranial Band 3D differs from the predicate device through the material used for the outer shell. The material used comprises of a thermoplastic resin, nylon polyamide, with fusing and detailing agents, and has passed biocompatibility and non-clinical bench tests. Further discussion of the material can be found in Section 12 (Substantial Equivalence Discussion).
#### VII. Non-Clinical Performance Data
There are no performance standards applicable to the subject device as established by FDA under section 514. Non-clinical test were performed based on typical handling of cranial orthoses.
- . Both outer shell and inner foam lining were tested and found to be biocompatible (reference Section 15).
- Tensile stress testing was conducted on the outer shell material of the subject device, in comparison to typical tensile strength values of the predicate device's outer shell. Average tensile strength value of the Hanger Cranial Band 3D was found to be higher than the copoly plastic values.
- Drop and chemical tests were performed on the outer shell and had passed the attribute acceptance criteria.
- Validation activities were performed and demonstrated that the device can be reliably manufactured with the intended geometry and dimensional tolerances based upon patient-specific scan information.
#### VIII. Clinical Performance Data
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There was no clinical testing required to support the medical device as the indications for use is equivalent to the predicate device. The predicate device has been on the market for years with a proven safety and efficacy for the use of the device.
#### IX. Conclusion/Statement of Substantial Equivalence
Hanger Cranial Band 3D has the same intended use as the predicate device, Hanger Cranial Band (K072566). The technological difference do not raise any questions regarding Hanger Cranial Band 3D's safety and effectiveness.
The information provided in this submission supports the substantial equivalence 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.