EsoCool Thermal Regulation Catheter

K233357 · Nuvaira, Inc. · PLA · Jun 27, 2024 · Cardiovascular

Device Facts

• Record ID: K233357
• Device Name: EsoCool Thermal Regulation Catheter
• Applicant: Nuvaira, Inc.
• Product Code: PLA · Cardiovascular
• Decision Date: Jun 27, 2024
• Decision: SESE
• Submission Type: Abbreviated
• Regulation: 21 CFR 870.5910
• Device Class: Class 2
• Attributes: Therapeutic

Intended Use

The EsoCool catheter is a thermal regulating device intended to connect to a Gentherm Blanketrol III Hyper-Hypothermia System to control the patient temperature.

Device Story

EsoCool Thermal Regulation Catheter is a single-use, disposable, non-implantable dual-lumen tube placed in the esophagus; connects to external Gentherm Blanketrol III Hyper-Hypothermia System. Operates as a closed-loop system circulating cold or warm fluid to modulate patient temperature. Used in clinical settings by healthcare professionals. Device provides thermal regulation for up to 24 hours. Benefits include controlled patient temperature management. Radiopaque material allows for visualization.

Clinical Evidence

Bench and animal testing performed. Bench testing: mechanical integrity, compatibility with external heater-cooler, and shelf-life stability. Animal testing: porcine model used to evaluate temperature change rates, temperature profiles, and esophageal safety via gross and light microscopy. Results demonstrated no esophageal injury and appropriate temperature control boundaries.

Technological Characteristics

Dual-lumen tube; polyurethane construction with barium sulfate for radiopacity; closed-loop fluid circulation; single-use; non-implantable; 24-hour duration; connects to external heater-cooler system.

Indications for Use

Indicated for patients requiring thermal regulation via connection to a Gentherm Blanketrol III Hyper-Hypothermia System.

Regulatory Classification

Identification

An esophageal thermal regulation device is a prescription device used to apply a specified temperature to the endoluminal surface of the esophagus via an external controller. This device may incorporate a mechanism for gastric decompression and suctioning. The device is used to regulate patient temperature.

Special Controls

In combination with the general controls of the FD&C Act, the Esophageal Cooling Device is subject to the following special controls:

*Classification.* Class II (special controls). The special controls for this device are:(1) The patient contacting materials must be demonstrated to be biocompatible. (2) Non-clinical performance evaluation must demonstrate that the device performs as intended under anticipated conditions of use. The following performance characteristics must be tested: (i) Mechanical integrity testing. (ii) Testing to determine temperature change rate(s). (iii) Testing to demonstrate compatibility with the indicated external controller. (iv) Shelf life testing. (3) Animal testing must demonstrate that the device does not cause esophageal injury and that body temperature remains within appropriate boundaries under anticipated conditions of use. (4) Labeling must include the following: (i) Detailed insertion instructions. (ii) Warning against attaching the device to unintended connections, such as external controllers for which the device is not indicated, or pressurized air outlets instead of vacuum outlets for those devices, including gastric suction. (iii) The operating parameters, name, and model number of the indicated external controller. (iv) The intended duration of use.

Predicate Devices

• EnsoETM (K172493)

Submission Summary (Full Text)

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June 27, 2024

Nuvaira, Inc. John Carline Sr. Director of Regulatory/Quality 6500 Wedgewood North, Suite 100 Maple Grove, Minnesota 55311

Re: K233357

Trade/Device Name: EsoCool Thermal Regulation Catheter Regulation Number: 21 CFR 870.5910 Regulation Name: Esophageal Thermal Regulation Device Regulatory Class: Class II Product Code: PLA Dated: May 28, 2024 Received: May 28, 2024

Dear John Carline:

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 (the 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 available 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.

Additional information about changes that may require a new premarket notification are provided in the FDA guidance documents entitled "Deciding When to Submit a 510(k) for a Change to an Existing Device" (https://www.fda.gov/media/99812/download) and "Deciding When to Submit a 510(k) for a Software Change to an Existing Device" (https://www.fda.gov/media/99785/download).

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Your device is also subject to, among other requirements, the Quality System (QS) regulation (21 CFR Part 820), which includes, but is not limited to, 21 CFR 820.30, Design controls; 21 CFR 820.90, Nonconforming product; and 21 CFR 820.100, Corrective and preventive action. Please note that regardless of whether a change requires premarket review, the QS regulation requires device manufacturers to review and approve changes to device design and production (21 CFR 820.30 and 21 CFR 820.70) and document changes and approvals in the device master record (21 CFR 820.181).

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 of medical device-related adverse events) (21 CFR Part 803) for devices or postmarketing safety reporting (21 CFR Part 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 Part 4, Subpart A) for combination products; and, if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR Parts 1000-1050.

Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21 CFR 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 ([e-mail]) or phone [phone] or 301-796-7100).

Sincerely.

# Nicole M. Gillette -S

Nicole Gillette Assistant Director DHT2B: Division of Circulatory Support, Structural and Vascular Devices OHT2: Office of Cardiovascular 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) K233357

Device Name EsoCool Thermal Regulation Catheter

Indications for Use (Describe)

The EsoCool catheter is a thermal regulating device intended to connect to a Gentherm Blanketrol III Hyper-Hypothermia System to control the patient temperature.

| Type of Use (Select one or both, as applicable) |
|-------------------------------------------------|
|-------------------------------------------------|

X Prescription Use (Part 21 CFR 801 Subpart D)

_ Over-The-Counter Use (21 CFR 801 Subpart C)

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| Contract Details | |
|------------------------------------|------------------------------------------------------------------------------------------------|
| Applicant Name and<br>Address: | Nuvaira, Inc.<br>6500 Wedgwood Road North, Suite 100<br>Maple Grove, MN 55311<br>United States |
| Applicant Contact<br>Information: | John Carline<br>Sr. Director of RA/QA<br>Tel: [phone]<br>Email: [e-mail] |
| Device Name | |
| Device Trade Name: | EsoCool Thermal Regulation Catheter |
| Common Name: | Esophageal thermal regulation device |
| Classification Name: | Esophageal thermal regulation device |
| Regulation Number: | 870.5910 |
| Product Code: | PLA |
| Legally Marketed Predicate Devices | |
| Predicate Number: | K172493 |
| Predicate Trade Name: | EnsoETM |
| Predicate Product Code: | PLA |

## Device Description Summary:

The EsoCool Thermal Regulation Catheter is a dual lumen tube that is placed in the esophagus. The two lumens are connected to an external heater cooler to allow for circulation of cold or warm fluid in a closed loop system. Heater cooler control is used to modulate the fluid temperature and control of patient's temperature. The EsoCool catheter is made of polyurethane with barium sulfate for radiopacity. The EsoCool catheter is a single-use, disposable, non-implantable device with an intended duration of use of 24 hours or less.

## Intended Use/Indications for Use:

The EsoCool catheter is a thermal regulating device intended to connect to a Gentherm Blanketrol III Hyper-Hypothermia System to control the patient temperature.

## Indications for Use Comparison to Predicate Device:

Indications for use is the same as the predicate device in that both are intended to control the patient temperature. The EsoCool catheter does not incorporate the optional mechanism for gastric decompression and suctioning and as such does include the indications statement related to gastric decompression and suctioning.

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## Technological Comparison to Predicate Device:

Technological characteristics are the same in that both provide a dual lumen tube to an external heater cooler for circulation of fluid in closed loop system. One difference is that the outer lumen of the EsoCool catheter is radiopacity of catheters is common across many cardiovascular catheters and does not constitute a novel technological characteristic.

## Non-Clinical and/or Clinical Tests Summary and Conclusions:

Bench and animal testing was performed to confirm conformance to the special controls per 21 CFR 870.5910.

Bench testing included:

- 1. Mechanical integrity testing,
- 2. Compatibility with the designated external heater cooler, and
- 3. Product stability through the designated shelf-life.

Animal testing included:

- 1. Temperature change rate in the porcine animal model,
- 2. Gross and light microscopy assessment of the esophagus to demonstrate no esophageal injury, and
- 3. Temperature profile to demonstrate appropriate boundaries of body temperature in the porcine animal model.

In conclusion, non-clinical testing demonstrate that the device is safe and as effective as the legally marked predicate device as identified above.