SpaceOAR Vue Hydrogel is intended to temporarily position the anterior rectal wall away from the prostate during radiotherapy for prostate cancer and in creating this space it is the intent of SpaceOAR Vue Hydrogel to reduce the radiation dose delivered to the anterior rectum. The SpaceOAR Vue Hydrogel is composed of biodegradable material and maintain space for the entire course of prostate radiotherapy treatment and is completely absorbed by the patient's body over time.
Device Story
SpaceOAR Vue Hydrogel is a synthetic, absorbable PEG-based hydrogel spacer; injected into the perirectal space between the anterior rectal wall and prostate. Device components include PEG precursor, diluent, and accelerator solutions; mixed via Y-connector and delivered via needle. Used during prostate radiotherapy; provides temporary physical separation of tissues to reduce rectal radiation exposure. Maintains space for approximately 3 months; fully absorbed by body via hydrolysis and renal filtration over 6 months. Features radiopacity for CT/CBCT visibility. Used by clinicians in a clinical setting. Benefits include reduced radiation-induced rectal toxicity.
Clinical Evidence
Bench testing only. Performance data included sterilization validation, modulus, gel volume (swell), gel time, pot life, usability, biocompatibility, and preclinical testing. No clinical data required for substantial equivalence.
Technological Characteristics
Synthetic, absorbable PEG-based hydrogel. Components: PEG precursor, diluent (trilysine buffer), and accelerator (buffered salt solution). Delivery: Y-connector and needle. Radiopaque for CT/CBCT visibility. Sterile, single-use. Biodegradable via hydrolysis; excreted via renal filtration.
Indications for Use
Indicated for prostate cancer patients undergoing radiotherapy; intended to temporarily position the anterior rectal wall away from the prostate to reduce radiation dose to the rectum.
Regulatory Classification
Identification
An absorbable perirectal spacer is composed of biodegradable material that temporarily positions the anterior rectal wall away from the prostate during radiotherapy for prostate cancer with the intent to reduce the radiation dose delivered to the anterior rectum. The absorbable spacer maintains space for the entire course of prostate radiotherapy treatment and is completely absorbed by the patient's body over time.
Special Controls
An absorbable perirectal spacer must comply with the following special controls: (1) The premarket notification submission must include methodology and results of the following non-clinical and clinical performance testing. For all clinical investigations used to support premarket notification submissions for this type of device, line listings of the study data must be provided. Performance bench testing must demonstrate appropriate perirectal space (i) creation and maintenance for the duration of prostate radiotherapy; Performance bench testing must demonstrate that therapeutic radiation levels (ii) do not alter the performance of the device; (iii) Performance in vivo testing must demonstrate appropriate deployment of spacer as indicated in the accompanying labeling, and demonstrate appropriate expansion and absorption characteristics in a clinically relevant environment; (iv) Clinical study must demonstrate appropriate spacer stability and lack of migration for the entire course of radiotherapy, complete absorption, and lack of long term toxicity: Sterility testing must demonstrate the sterility of the device and the effects of (v) the sterilization process on the physical characteristics of the spacer; (vi) Shelf-life testing must demonstrate the stability of the physical characteristics of the spacer throughout the shelf-life as indicated in the accompanying labeling: and. (vii) The device must be demonstrated to be biocompatible. (2) The risk management activities performed as part of the manufacturer's 21 CFR 820.30 design controls must document an appropriate end user initial training program which will be offered as part of efforts to mitigate the risk of failure to correctly operate the device, including, but not limited to, documentation of an appropriate end user initial training program on the proper spacer deployment technique. (3) The device labeling must include the following: A detailed summary of reported or observed complications related to the use (i) of the device; (ii) Appropriate warnings; Detailed instructions for system preparations and detailed implant procedure (iii) instructions; and, (iv) An expiration date that is supported by performance data as specified in subparagraph (b)(i)(vi).
*Classification.* Class II (special controls). The special controls for this device are:(1) The premarket notification submission must include methodology and results of the following non-clinical and clinical performance testing. For all clinical investigations used to support premarket notification submissions for this type of device, line listings of the study data must be provided.
(i) Performance bench testing must demonstrate appropriate perirectal space creation and maintenance for the duration of prostate radiotherapy.
(ii) Performance bench testing must demonstrate that therapeutic radiation levels do not alter the performance of the device.
(iii) Performance in vivo testing must demonstrate appropriate deployment of spacer as indicated in the accompanying labeling, and demonstrate appropriate expansion and absorption characteristics in a clinically relevant environment.
(iv) Clinical study must demonstrate appropriate spacer stability and lack of migration for the entire course of radiotherapy, complete absorption, and lack of long term toxicity.
(v) Sterility testing must demonstrate the sterility of the device and the effects of the sterilization process on the physical characteristics of the spacer.
(vi) Shelf-life testing must demonstrate the stability of the physical characteristics of the spacer throughout the shelf-life as indicated in the accompanying labeling.
(vii) The device must be demonstrated to be biocompatible.
(2) The risk management activities performed as part of the manufacturer's § 820.10(c) of this chapter design and development activities must document an appropriate end user initial training program which will be offered as part of efforts to mitigate the risk of failure to correctly operate the device, including, but not limited to, documentation of an appropriate end user initial training program on the proper spacer deployment technique.
(3) The device labeling must include the following:
(i) A detailed summary of reported or observed complications related to the use of the device;
(ii) Appropriate warnings;
(iii) Detailed instructions for system preparations and detailed implant procedure instructions; and
(iv) An expiration date that is supported by performance data as specified in paragraph (b)(1)(vi) of this section.
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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 19, 2019
Augmenix, Inc. % Mr. Marcus Garcia Principal Regulatory Affairs Specialist 201 Burlington Road, North Building BEDFORD MA 01730
Re: K182971
Trade/Device Name: SpaceOAR Vue Hydrogel Regulation Number: 21 CFR 892.5725 Regulation Name: Absorbable Perirectal Spacer Regulatory Class: Class II Product Code: OVB Dated: June 13, 2019 Received: June 14, 2019
Dear Mr. Garcia:
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.
Thalia T. Mills, Ph.D. Director Division of Radiological Health OHT7: Office of In Vitro Diagnostics and Radiological Health 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) K182971
Device Name Space OAR Vue Hydrogel
### Indications for Use (Describe)
SpaceOAR Vue Hydrogel is intended to temporarily position the anterior rectal wall away from the prostate during radiotherapy for prostate cancer and in creating this space it is the intent of SpaceOAR Vue Hydrogel to reduce the radiation dose delivered to the anterior rectum. The SpaceOAR Vue Hydrogel is composed of biodegradable material and maintain space for the entire course of prostate radiotherapy treatment and is completely absorbed by the patient's body over time.
Type of Use (Select one or both, as applicable)
| Prescription Use (Part 21 CFR 801 Subpart D) | <span> </span> <img alt="Checked" src="checkbox-checked.png"/> |
|----------------------------------------------|--------------------------------------------------------------------|
| Over-The-Counter Use (21 CFR 801 Subpart C) | <span> </span> <img alt="Unchecked" src="checkbox-unchecked.png"/> |
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## 6 510(k) Summary
Date: October 25, 2018
#### l. SUBMITTER
Augmenix, Inc. 201 Burlington Road Bedford, MA 01730
Establishment Registration Number: 3008550999
Contact Person: Marcus Garcia, RAC
Phone: 781-541-4360 email: mgarcia@augmenix.com
#### ll. DEVICE
Device Trade Name: SpaceOAR Vue™Hydrogel, Model Number: SV-2101 Device Common or Usual Name: Absorbable Perirectal Spacer Device Classification Name: Hydrogel Spacer Device Classification: Class II Device Product Code: OVB Device Review Panel: Radiology
#### lll. PREDICATE DEVICE
Predicate Device Trade Name: SpaceOAR® Hydrogel System Cleared for Marketing Under: DEN140030 and K181465.
Reference device: TracelT® Tissue Marker K151998 and K121964.
#### IV. DEVICE DESCRIPTION
The SpaceOAR Vue Hydrogel consists of components for the preparation of a synthetic, absorbable hydrogel spacer and a delivery mechanism provided in a sterile, single use package. The SpaceOAR Vue Hydrogel is a synthetic, absorbable polyethylene glycol (PEG)-based hydrogel that upon injection creates a space that temporarily positions the anterior rectal wall away from the prostate during radiotherapy for prostate cancer and in creating this space it is the intent of the perirectal spacer to reduce the radiation dose
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delivered to the anterior rectum. SpaceOAR Vue Hydrogel is completely synthetic with no animal or human derived components. It is composed of biodegradable material and maintains space for the entire course of prostate radiotherapy treatment (approximately 3 months) and is completely absorbed by the patient's body over time (about 6 months).
The SpaceOAR Vue Hydrogel consists of two syringes containing the PEG Precursor solution and the Accelerator solution (a buffered salt solution). The Precursor solution is formed by the user through the reconstitution of PEG powder with a Diluent (Trilysine buffer) solution (that is provided in a third syringe). The Accelerator solution is provided ready for use. The Syringes filled with the Precursor solution and the Accelerator solution are assembled with other applicator components, including a Y-connector for mixing the Precursor and Accelerator, and a needle to facilitate delivery of the hydrogel by injection to the tissue located between the anterior rectal wall and the prostate.
#### V. INDICATIONS FOR USE
SpaceOAR Vue Hydrogel is intended to temporarily position the anterior rectal wall away from the prostate during radiotherapy for prostate cancer and in creating this space it is the intent of SpaceOAR Vue Hydrogel to reduce the radiation dose delivered to the anterior rectum. The SpaceOAR Vue Hydrogel is composed of biodegradable material and maintains space for the entire course of prostate radiotherapy treatment and is completely absorbed by the patient's body over time.
The Indications for Use Statement for the subject SpaceOAR Vue Hydrogel is identical to the predicate device.
### VI. COMPARISON OF TECHNOLOGICAL CHARACTERISTICS WITH THE PREDICATE DEVICE
The underlying technological characteristics of the subject SpaceOAR Vue Hydrogel and the predicate device are identical. Both devices are a system that facilitates the implantation of 10mL biodegradable PEG hydrogel between the anterior rectal wall and prostate prior to radiotherapy. This temporarily creates space between the anterior rectal wall and prostate during radiotherapy. The PEG hydrogel is broken down through hydrolysis and excreted from the body through renal filtration. The key difference between the SpaceOAR Vue and the predicate device is the additional feature of radiopacity. SpaceOAR Vue introduces the added benefit of radiopacity for CT and CBCT visibility. All other features of the devices remain the same.
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#### VII. PERFORMANCE DATA
Applicable verification and validation testing was performed as required by the Augmenix design control process. The following performance data were provided in support of the substantial equivalence determination:
- Sterilization Validation
- Modulus Testing ●
- Gel Volume (Swell) Testing ●
- Gel Time Testing ●
- Pot Life Testing
- Usability Testing
- Biocompatibility Testing ●
- Preclinical Testing .
The subject device has met the same device specifications as the predicate device; therefore, clinical data were not required to support a determination of substantial equivalence.
### Summary
Verification and/or validation of the subject device was completed and confirmed that the subject SpaceOAR Vue Hydrogel meets the same finished device specification as the predicate SpaceOAR® Hydrogel System.
#### VIII. CONCLUSION
The subject SpaceOAR Vue Hydrogel met all acceptance criteria for verification and/or validation. This demonstrates that the subject device performance is equivalent to the predicate device and that the subject device performance supports the requirements of the device intended use.
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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.
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Exact vs. fuzzy search: what's the difference?
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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.
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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.
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Reading rule for every project: how many summaries do you read in full?
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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.
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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.
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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.