CoStorSol® plus G is intended for the flushing and cold storage of liver, kidney, and pancreas organs at the time of organ removal from the donor in preparation for storage, transportation and eventual transplantation into a recipient.
Device Story
CoStorSol® plus G is a sterile, non-pyrogenic, hypothermic organ storage solution; formulation includes soluble colloids, buffers, sodium/potassium salts, redox stabilizers, and phosphoric compounds. Used by transplant teams during organ procurement; solution is chilled to 2-6°C; organs are flushed to clear blood and stored in solution to depress metabolism and maintain viability. Device is supplied in 1-liter flexible EVA-laminated plastic bags with an optional 0.922g sterile glutathione powder vial. Glutathione is an optional additive previously cleared for use with the predicate; inclusion in the package is for clinical convenience. No change to intended use or clinical methods. Benefits include maintained histological viability of donor organs during transport.
Clinical Evidence
Bench testing only. No clinical data provided. Testing included biocompatibility (cytotoxicity, acute systemic toxicity, dermal sensitization, hemolysis, intracutaneous reactivity/irritation per ISO 10993), particulate matter (USP <788>), and shelf-life validation (accelerated and natural aging).
Technological Characteristics
Synthetic medium of organic/inorganic compounds; pH 7.4; osmolality ~320 mOsM. Supplied in 1L flexible EVA-laminated plastic bags. Sterilized via 0.1μm membrane filtration. Biocompatibility per ISO 10993; particulate matter per USP <788>. Shelf life 1 year at 2-25°C.
Indications for Use
Indicated for flushing and cold storage of liver, kidney, and pancreas organs during removal from donor, transport, and preparation for transplantation into a recipient.
Regulatory Classification
Identification
An isolated kidney perfusion and transport system and accessories is a device that is used to support a donated or a cadaver kidney and to maintain the organ in a near-normal physiologic state until it is transplanted into a recipient patient. This generic type of device may include tubing, catheters, connectors, an ice storage or freezing container with or without bag or preservatives, pulsatile or nonpulsatile hypothermic isolated organ perfusion apparatus with or without oxygenator, and disposable perfusion set.
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Food and Drug Administration 10903 New Hampshire Avenue Document Control Center - WO66-G609 Silver Spring, MD 20993-0002
September 18, 2015
Preservation Solutions, Inc. % Neil Burris Principal Consultant Neil Burris and Associates 4250 Grove Street Denver, CO 80211
Re: K151728
> Trade/Device Name: CoStorSol® plus G Regulation Number: 21 CFR§ 876.5880 Regulation Name: Isolated kidney perfusion and transport system and accessories. Regulatory Class: II Product Code: KDN Dated: June 24, 2015 Received: June 26, 2015
Dear Neil Burris,
We have reviewed your Section 510(k) premarket notification of intent to market the device referenced above and have determined the device is substantially equivalent (for the indications for use stated in the enclosure) to legally marketed predicate devices marketed in interstate commerce prior to May 28, 1976, the enactment date of the Medical Device Amendments, or to devices that have been reclassified in accordance with the provisions of the Federal Food, Drug, and Cosmetic Act (Act) that do not require approval of a premarket approval application (PMA). You may, therefore, market the device, subject to the general controls provisions of the Act. The general controls provisions of the Act include requirements for annual registration, listing of devices, good manufacturing practice, labeling, and prohibitions against misbranding and adulteration. Please note: CDRH does not evaluate information related to contract liability warranties. We remind you, however, that device labeling must be truthful and not misleading.
If your device is classified (see above) into either class II (Special Controls) or class III (PMA), it may be subject to additional controls. Existing major regulations affecting your device can be found in the Code of Federal Regulations, Title 21, Parts 800 to 898. In addition, FDA may publish further announcements concerning your device in the Federal Register.
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.
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You must comply with all the Act's requirements, including, but not limited to: registration and listing (21 CFR Part 807); labeling (21 CFR Part 801); medical device reporting (reporting of medical device-related adverse events) (21 CFR 803); good manufacturing practice requirements as set forth in the quality systems (QS) regulation (21 CFR Part 820); and if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR 1000-1050.
If you desire specific advice for your device on our labeling regulation (21 CFR Part 801), please contact the Division of Industry and Consumer Education at its toll-free number (800) 638-2041 or (301) 796-7100 or at its Internet address
http://www.fda.gov/MedicalDevices/Resourcesfor You/Industry/default.htm. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21CFR Part 807.97). For questions regarding the reporting of adverse events under the MDR regulation (21 CFR Part 803), please go to
http://www.fda.gov/MedicalDevices/Safety/ReportaProblem/default.htm for the CDRH's Office of Surveillance and Biometrics/Division of Postmarket Surveillance.
You may obtain other general information on your responsibilities under the Act from the Division of Industry and Consumer Education at its toll-free number (800) 638-2041 or (301) 796-7100 or at its Internet address
http://www.fda.gov/MedicalDevices/ResourcesforYou/Industry/default.htm.
Sincerely yours,
# Herbert P. Lerner -S
for Benjamin R. Fisher, Ph.D. Director Division of Reproductive, Gastro-Renal, and Urological Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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# Indications for Use
510(k) Number (if known) K151728
Device Name CoStorSol plus G
Indications for Use (Describe)
CoStorSol® plus G is intended for the flushing and cold storage of liver, kidney, and pancreas organs at the time of organ removal from the donor in preparation for storage, transportation and eventual transplantation into a recipient.
| Type of Use (Select one or both, as applicable) | |
|-------------------------------------------------|--|
|-------------------------------------------------|--|
| <div style="display:flex; align-items:center;"><input checked="" type="checkbox"/>Prescription Use (Part 21 CFR 801 Subpart D)</div> |
|--------------------------------------------------------------------------------------------------------------------------------------|
| <div style="display:flex; align-items:center;"><input type="checkbox"/>Over-The-Counter Use (21 CFR 801 Subpart C)</div> |
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## 510(k) SUMMARY
## SUBMITTER INFORMATION
- A. Company Name: Preservation Solutions Inc.
- B. Company Address: 1099 Proctor Drive Elkhorn, Wisconsin 53121
- C. Company Phone: 262 723 6715
- D. Company Facsimile: 262 723 4013
- E. Contact Person: William Wagner Quality Assurance Director
## DEVICE IDENTIFICATION
- A. Device Trade Name: CoStorSol® plus G
- B. Device Common Name: Organ Storage Solution
- C. Classification Name: Isolated kidney perfusion and transport system and accessories
- D. Class II (21 CRF 876.5880)
- E. Device Code: KDN
## IDENTIFICATION OF PREDICATE DEVICES
CoStorSol® cold storage solution cleared to market under:
#### Premarket Notifications K091245, K083453, and K073693.
is an exact predicate to the proposed device CoStorSol® plus G.
#### DEVICE DESCRIPTION
Preservation Solutions, Inc. manufacturers CoStorSol® plus G according to a "recipe" pioneered at the University of Wisconsin by Folkert O. Belzer, MD and James H. Southard, PhD. Indeed, this cold storage solution is often referred to as "Belzer UW" solution. The formulation includes soluble colloids, buffers, sodium and potassium salts, redox stabilizers, and phosphoric compounds.
CoStorSol® plus G is a clear to light yellow, sterile, non-pyrogenic solution for hypothermic flushing and storage of organs. The solution is packaged in 1-liter bags, to which 0.922 g of
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sterile glutathione may be added just prior to use. The solution must be chilled to between 2° and 6° C prior to use.
#### INDICATIONS FOR USE
#### INTENDED USE
CoStorSol® plus G is intended for the flushing and cold storage of liver, kidney, and pancreas organs at the time of organ removal from the donor in preparation for storage, transportation and eventual transplantation into a recipient.
## COMPARISON TO PREDICATE DEVICES
CoStorSol® solution received substantial equivalence determinations after submissions filed under premarket notification (510(k)) numbers K091245, K083453, and K073693. The modified device, CoStorSol® plus G, is exactly the same as the predicate device, except that the new device will include a single vial of sterile glutathione powder (0.922 g). The glutathione is included as a convenience should the attending physicians, and/or transplant team, choose to use it as an optional additive to 1 Liter of CoStorSol® at the time of use. The Instructions for Use of CoStorSol® have always included statements advising the optional addition of 0.922 g of glutathione when deemed necessary due to the exact circumstances of the transplant case. Including a vial of glutathione in a package of CoStorSol® plus G thus represents no change to either the intended use or the specific methods of use for the device.
Substantial Equivalence Comparison Table for CoStorSol® plus G vs. CoStorSol®
| Device<br>Attribute | CoStorSol® plus G<br>(Proposed Device) | CoStorSol® K091245<br>(Predicate Device) | Equivalent? |
|-------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Intended Use | •CoStorSol® plus G is intended for the<br>flushing and cold storage of liver, kidney,<br>and pancreas organs at the time of organ<br>removal from the donor in preparation for<br>storage, transportation and eventual<br>transplantation into a recipient. | CoStorSol® is intended for the flushing<br>and cold storage of kidney, liver and<br>pancreas organs at the time of organ<br>removal from the donor in preparation<br>for storage, transportation and eventual<br>transplantation into a recipient. | Identical |
| Preparation for<br>Use | Chill to 2° to 6° C without freezing;<br>Required addition to 1L of CoStorSol®:<br>Penicillin G-200,000 units, Insulin-40<br>Units, Dexamethasone-16mg;<br>Optional addition to 1L CoStorSol®:<br>glutathione 0.922g | Chill to 2° to 6° C without freezing;<br>Required addition to 1L of CoStorSol®:<br>Penicillin G-200,000 units, Insulin-40<br>Units, Dexamethasone-16mg;<br>Optional addition to 1L CoStorSol®:<br>glutathione 0.922g | Identical |
| Device<br>Attribute | CoStorSol® plus G<br>(Proposed Device) | CoStorSol® K091245<br>(Predicate Device) | Equivalent? |
| Chemical<br>Composition | A synthetic medium of defined organic,<br>and inorganic, soluble chemical<br>compounds with specified purity.<br>pH = 7.4 nominal<br>osmolality $\approx$ 320 mOsM | A synthetic medium of defined organic,<br>and inorganic, soluble chemical<br>compounds with specified purity.<br>pH = 7.4 nominal<br>osmolality $\approx$ 320 mOsM | Identical |
| Packaging -<br>How Supplied | Filter sterilized using 0.1μm membrane(s)<br>and aseptically filled into biocompatible, 1<br>liter flexible solution bags made of<br>laminated plastic with an ethylene-vinyl-<br>acetate (EVA) layer contacting the<br>solution. The bags have integrated<br>delivery set ports, and are packaged with<br>a single 10mL polyethylene terephthalate<br>(PETG) vial holding 0.922 g sterile non-<br>pyrogenic glutathione.<br>CoStorSol® is non-pyrogenic. Shelf<br>packs contain 6, 1-liter bags and 6 vials<br>of glutathione powder | Filter sterilized using 0.1μm membrane(s)<br>and aseptically filled into biocompatible,<br>1 liter flexible solution bags made of<br>laminated plastic with an ethylene-vinyl-<br>acetate (EVA) layer contacting the<br>solution. The bags have integrated<br>delivery set ports. CoStorSol® is non-<br>pyrogenic. Shelf packs contain 10, 1-<br>liter bags. | Substantially<br>Equivalent -<br>Sterile<br>glutathione, an<br>optional additive<br>to both the<br>subject device<br>and predicate,<br>is provided with<br>1L units of<br>CoStorSol®. |
| Sterility | Sterility Assured via 0.1 μm membrane<br>filtration | Sterility Assured via 0.1 μm membrane<br>filtration | Identical |
| Storage<br>Temperature<br>and Shelf Life | Indoors with temperature controlled at 2°-<br>25°C, without freezing;<br>1year (12 month) shelf life | Indoors with temperature controlled at<br>2°-25°C, without freezing;<br>1 year (12 month) shelf life | Identical |
| Actions and<br>Functions | Use cold solution to flush organ<br>immediately before and/or after removal<br>to clear blood from the vasculature. Store<br>organs cold in aliquot of the same solution<br>to maintain histological viability by<br>depressing metabolism. | Use cold solution to flush organ<br>immediately before and/or after removal<br>to clear blood from the vasculature.<br>Store organs cold in aliquot of the same<br>solution to maintain histological viability<br>by depressing metabolism. | Identical |
| Particulate<br>Matter and<br>Biocompatibility | Particle Counts less than limits for Large<br>Volume Injections per USP <788>;<br>Biocompatible per ISO 10993-1 battery of<br>tests for Externally Communicating Blood<br>Path Indirect Contact for prolonged<br>periods >24 hours. | Particle Counts less than limits for<br>Large Volume Injections per USP<br><788>; Biocompatible per ISO 10993-1<br>battery of tests for Externally<br>Communicating Blood Path Indirect<br>Contact for prolonged periods >24<br>hours. | Identical |
| Interaction with<br>Other Medical<br>Technology | CoStorSol® plus G is not intended for<br>continuous perfusion. Standard<br>transplantation surgical expertise and<br>techniques are required. | CoStorSol® is not intended for<br>continuous perfusion. Standard<br>transplantation surgical expertise and<br>techniques are required. | Identical |
Continued next page
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# BIOCOMPATIBILITY, STERILIZATION, PACKAGING, AND BENCH TESTING
Test results have shown CoStorSol® plus G to be a biocompatible solution, supplied in flexible solution bags made of laminated plastic with an ethylene-vinyl-acetate (EVA) layer contacting the solution, which have likewise been tested and shown to be biocompatible. The ISO 10993 series of standards were referenced during the planning and execution of all biocompatibility testing,
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including: cytotoxicity, acute systemic toxicity, dermal sensitization, hemolysis, and intracutaneous reactivity/irritation. Particulate matter does not exceed the limits set in USP Section <788>, for large volume injections.
The 1 Liter of CoStorSol®, and the single vial of glutathione, are both supplied sterile and nonpyrogenic in order to assure safety for transplant recipients.
Sterilization processes for CoStorSol® plus G were validated according to the ISO 13408 series applicable to aseptic filling, or the ISO 11137 series of standards application to radiation sterilization, as appropriate.
Preservation Solutions, Inc. has validated shelf life for CoStorSol® plus G using a combination of accelerated aging and natural aging protocols, supporting expiry periods of up to 1 year. Shelf life verification tests show that aged CoStorSol® plus G remains functionally equivalent to newly manufactured solution via tests for biocompatibility, particulate matter, chemical identity, general appearance, weight loss, and package integrity.
#### CONCLUSION
The above statements establish substantial equivalence between the predicate CoStorSol® product, and CoStorSol® plus G.
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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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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.
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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.
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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.