The Medi-Therm is intended for use in supplying warm or cold water at controlled temperatures via water circulating blankets or body wraps for the application of regulating patient temperature in situations where a physician determines that temperature therapy is necessary and desirable. Indications for use for the Medi-Therm thermal regulating system include: - To maintain pre-set body temperature as determined by the physician a. - b. To maintain normal body temperature during surgical procedures - c. For use in all hospital areas including invasive and coronary care units, in operating, recovery and emergency rooms, in burn units and on medical/surgical floors - d. This system can be used with adult and pediatric patients - Monitoring and controlling patient temperature e. - Temperature reduction in patients where clinically indicated, e.g. in hyperthermic f. patients
Device Story
Medi-Therm Hyper/Hypothermia System regulates patient temperature via water-circulating blankets or body wraps. System inputs include patient temperature data from YSI 400 series probes and user-defined setpoints via control panel. Microprocessor-controlled solenoid valves mix hot and cold water to achieve target temperatures; system includes circulating pump, heater, and refrigeration unit. Used in hospital environments (OR, ER, ICU, etc.) by clinicians. Output is temperature-controlled water circulated to patient interface. Automatic mode maintains patient temperature (30-41°C); manual mode allows direct water temperature control (4-42°C). Provides clinicians with precise thermal management to maintain normothermia or induce therapeutic temperature changes, benefiting patients in surgical or hyperthermic states.
Clinical Evidence
Bench testing only. Testing confirmed temperature control performance, stability, flow, and biocompatibility (ISO 10993-5, ISO 10993-10, 16 CFR 1500). Compliance with IEC/EN 60601-1-2, CISPR 11/EN 55011, and UL 416 verified. No clinical data presented.
Technological Characteristics
Thermal regulating system using water circulation. Components: controller, hose sets, disposable non-sterile blankets/wraps, YSI 400 series patient probes. Heating: 500-800W electrical elements. Cooling: refrigeration compressor. Microprocessor-controlled solenoid mixing. Safety: Power-on self-test (POST), alarms for water level, flow, probe anomalies, and high water temperature (software primary, bimetallic thermostat secondary/tertiary). Atmospheric operating pressure. Standards: IEC/EN 60601-1-2, CISPR 11/EN 55011, UL 416.
Indications for Use
Indicated for adult and pediatric patients requiring temperature regulation, including maintenance of body temperature during surgery, monitoring/controlling patient temperature, and reduction of temperature in hyperthermic patients. Used in hospital settings including OR, recovery, ER, burn units, and ICU/CCU.
Regulatory Classification
Identification
A thermal regulating system is an external system consisting of a device that is placed in contact with the patient and a temperature controller for the device. The system is used to regulate patient temperature.
Predicate Devices
Gaymar Industries Inc. Medi-Therm System MTA5900 (K912051)
MedCool Inc. RapidCool™ Patient Temperature Management System (K070112)
Medivance ArcticSun Temperature Management System (K071341)
M.T.R.E. Advanced Technology Ltd. CritiCool System (K083662)
M.T.R.E. Advanced Technology Ltd. Allon 2001 System (K003349)
Submission Summary (Full Text)
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## 510(k) Summarv
#### Gaymar Industries Inc.
JAN 2 0 2011
Medi-Therm Hyper/Hypothermia System
K100585
### SUBMITTER/510(K) HOLDER
| Name: | |
|----------|--|
| Address: | |
Telephone:
Gaymar Industries Inc. 10 Centre Dr. Orchard Park NY 14127 Contact Person: Brian L. Orwat 716 662 8647
Date Prepared: May 7, 2010
#### DEVICE NAME
Proprietary Name: Catalog Numbers: Common/Usual Name: Classification Name: Product Code:
Medi-Therm Hyper/Hypothermia System MTA6900, MTA7900 Hyper/Hypothermia System Thermal Regulating System (21 CFR § 870.5900) DWJ
### PREDICATE DEVICES
Gaymar Industries Inc. ("Gaymar") claims substantial equivalence to:
- Gaymar Industries Inc. Medi-Therm System MTA5900 (K912051) 1.
- 2. MedCool Inc. RapidCool™ Patient Temperature Management System. (K070112)
- 3. Medivance ArcticSun Temperature Management System (K071341)
- 4. M.T.R.E. Advanced Technology Ltd. CritiCool System (K083662)
- 5. M.T.R.E. Advanced Technology Ltd. Allon 2001 System (K003349)
### DEVICE DESCRIPTION
The Gaymar Medi-Therm device provides a means of regulating patient temperature by supplying temperature-controlled water through a connector hose to accessory Gaymar Hyper/Hypothermia blanket/s)/body wrap(s). The blanket/body wrap provides an interface for heating or cooling the patient. Accessory YSI 400 series patient probe interfaces between the Medi-Therm and patient to sense patient temperature, which is displayed on the device's control panel. The Medi-Therm device controls output water temperature by mixing hot and cold water
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using hot and cold solenoid valves under microprocessor control. The device includes a circulating pump, heater and refrigeration system.
The Medi-Therm controller, connector hose, blanket/body wrap and patient probe comprise the Medi-Therm Hyper/Hypothermia System.
# INTENDED USE
The Medi-Therm is intended for use in supplying warm or cold water at controlled temperatures via water circulating blankets or body wraps for the application of regulating patient temperature in situations where a physician determines that temperature therapy is necessary and desirable.
Indications for use for the Medi-Therm thermal regulating system include:
- To maintain pre-set body temperature as determined by the physician a.
- b. To maintain normal body temperature during surgical procedures
- c. For use in all hospital areas including invasive and coronary care units, in operating. recovery and emergency rooms, in burn units and on medical/surgical floors
- d. This system can be used with adult and pediatric patients
- Monitoring and controlling patient temperature e.
- Temperature reduction in patients where clinically indicated, e.g. in hyperthermic f. patients
# TECHNOLOGICAL CHARACTERISTICS AND SUBSTANTIAL EQUIVALENCE
Substantial equivalence is based on five predicate devices. All above referenced predicates are thermal regulating systems as defined in 21 CFR § 870.5900.
Like the Medi-Therm, all predicate devices utilize a controller incorporating a water circulation pump, hose sets, a disposable non-sterile body surface contact appliance and a means to monitor the patient temperature. The devices all require a physician's prescription for use. The external anatomical sites for the patient contact appliance are similar for all devices - trunk and extremities. The RapidCool additionally uses neck and head patient contact appliances. All device patient contact appliances are applied on, around and/or under the patient where the thermal transfer is dependent upon patient contact.
The Medi-Therm is equivalent in operational characteristics to the predicate devices in that the control units all use microprocessors to circulate temperature-controlled water at similar nonadiustable flow rates through hose sets to a patient contact pad/blanket/garment. Flow rates however, will be determined by pad/blanket/garment size and quantity connected to the devices. The physician determines the size and quantity of pad/blanket/garment to be used.
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In each device's Automatic Mode, patient temperature is monitored and controlled through the use of commercially available YSI 400 series probes connected between the controller and patient. The physician selects a therapeutic temperature and the device user sets the desired patient temperature for hypothermia condition via the controller interface. Each device will channel the temperature controlled water to the patient contact pad/blanket/garment to achieve and maintain the controller setting for patient temperature. The Medi-Therm Automatic mode temperature is in the range of 30 - 41°C. the same range as supported by the predicate devices. Additionally, the Medi-Therm and Arctic Sun have Manual Modes where a user can set. water temperature (not patient temperature) in the range of 4 - 42°C to be circulated to the patient contact pad/blanket/garment.
The Medi-Therm includes additional temperature control options within the Automatic Mode. The user can select either Gradual. Moderate or Rapid cooling modes for the MTA6900. The user can select either Gradual, Moderate or Rapid cooling and warming modes for the MTA7900. These pre-set temperature control modes are within the previously cleared temperature range for the device.
All of the predicate devices' cooling sources are either water/air heat exchanger, thermoelectric or typical refrigeration compressor. The heating sources are electrical heater elements ranging from 500 - 800W. The Medi-Therm, CritiCool and Arctic Sun include a power on self test (POST) and safety alarms for water level, interrupted water flow, patient probe anomalies including patient temperature and open/short circuit, and high water temperature. The redundancy of high water temperature protective circuits is to the tertiary level for the Medi-Therm and Allon 2001 and at least duplicative for the Arctic Sun device. The primary high water temperature for the Medi-Therm is software controlled with bimetallic thermostats for the secondary and tertiary levels.
The patient contact pad/blanket/garment operating water pressure is atmospheric for the Medi-Therm, RapidCool, CritiCool and Allon 2001and Medi-Therm predicates. Whereas, the Arctic Sun's operating pressure is sub-atmospheric.
Bench testing was conducted to confirm the MTA6900 and MTA7900 and their disposable accessories operate as described in this submission and therefore are as safe and effective as the predicate devices to which it claims substantial equivalence. Bench testing included:
- Temperature Control Performance .
- Temperature Stability and Flow .
- Biocompatibility (ISO 10993-5; ISO10993-10; 16 CFR 1500) .
- Ship Testing (ISTA 1A) .
The MTA6900 and MTA7900 controller comply with the following standards:
- · IEC/EN60601-1-2 Medical Electrical Equipment, Pat 1: General Requirements for Safety, Collateral Standard: Electromagnetic Compatibility Requirements and Tests
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- · CISPR 11 / EN 55011, Limits and Methods of Measurements of Radio Disturbance Characteristics of Industrial, Scientific and Medical (ISM) Radio-Frequency Equipment
- · UL 416 -- Refrigerated Medical Equipment
Results of the bench testing concludes that the design, operational and technical characteristics of the Medi-Therm Hyper/Hypothermia System is substantially equivalent to and as safe and effective as that of the predicate devices.
The Medi-Therm Hyper/Hypothermia Systems' intended uses are substantially supported by the previously cleared predicate devices. The Medi-Therm Hyper/Hypothermia Systems' indication for use statement includes all the same indications as the previously cleared predicate devices.
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Image /page/4/Picture/1 description: The image shows the logo for the Department of Health & Human Services USA. The logo is a circular seal with the words "DEPARTMENT OF HEALTH & HUMAN SERVICES USA" written around the perimeter. Inside the circle is a stylized image of an eagle with its wings spread, with three wavy lines below the eagle.
Food and Drug Administration 10903 New Hampshire Avenue Document Control Room -WO66-G609 Silver Spring, MD 20993-0002
Gaymar Industries, Inc. c/o Mr. Brian L. Orwat 10 Centre Dr. Orchard Park, NY 14127
JAN 2 0 23:1
Re: K100585
Trade/Device Name: Medi-Therm Hyper/Hypothermia System, MTA6900 and MTA7900 Regulation Number: 21 CFR 870.5900 Regulation Name: Thermal regulating system Regulatory Class: II Product Code: DWJ Dated: January 14, 2011 Received: January 18, 2011
Dear Mr. Orwat:
【
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. 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
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Page 2 – Mr. Brian L. Orwat
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 go to http://www.fda.gov/AboutFDA/CentersOffices/CDRH/CDRHOffices/ucm115809.htm for the Center for Devices and Radiological Health's (CDRH's) Office of Compliance. 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 Small Manufacturers, International and Consumer Assistance 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.
Sincerely yours,
R. hihner
Image /page/5/Picture/7 description: The image shows a handwritten letter 'A' on the left side and the letters 'B' and 'D' stacked on top of each other on the right side. The letter 'A' is written in a cursive style with a loop at the top. The letters 'B' and 'D' are written in a simple, block-letter style. The image is simple and contains only these letters.
Bram D. Zuckerman, M.D. Director Division of Cardiovascular Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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### Indications for Use
510(k) Number:
K100583
Device Name:
Medi-Therm Hyper/Hypothermia System
Indications for Use:
The Medi-Therm is intended for use in supplying warm or cold water at controlled temperatures via water circulating blankets or body wraps for the application of regulating patient temperature in situations where a physician determines that temperature therapy is necessary and desirable.
Indications for use for the Medi-Therm thermal regulating system include:
- To maintain pre-set body temperature as determined by the physician a.
- b. To maintain normal body temperature during surgical procedures
- C. For use in all hospital areas including invasive and coronary care units, in operating, recovery and emergency rooms, in burn units and on medical/surgical floors
- d. This system can be used with adult and pediatric patients
- e. Monitoring and controlling patient temperature
- Temperature reduction in patients where clinically indicated, e.g. in hyperthermic f. patients
Prescription Use __ X (Part 21 CFR 801 Subpart D) AND/OR
Over-The-Counter Use (21 CFR 807 Subpart C)
(PLEASE DO NOT WRITE BELOW THIS LINE CONTINUE ON ANOTHER PAGE IF NEEDED)
Concurrence of CDRH, Office of Device Evaluation (ODE)
Duma R. V. Lamer
Page lof 1
Division Sign-Off) Division of Čardiovascular Devices
510(k) Number_K100585
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.