The THERMOGARD XP can be used with any of the Alsius Catheters. The indications for use are specific to the catheter. Please refer to the Indications for Use statement in the catheter specific Instructions for Use. The THERMOGARD XP/Alsius Catheter Thermal Regulation System, using either the Icy™ or Fortius™ model catheter, is indicated for use: . In cardiac surgery patients to achieve and or maintain normothermia during surgery and recovery/intensive care, and To induce, maintain and reverse mild hypothermia in neurosurgery patients in . surgery and recovery/intensive care. The Alsius THERMOGARD XP™ and Cool Line™ Catheter Thermal Requlation System is indicated for use in fever reduction, as an adjunct to other antipyretic therapy, in patients with cerebral infarction and intracerebral hemorrhage who require access to the central venous circulation and who are intubated and sedated.
Device Story
THERMOGARD XP is an electro-mechanical heater/cooler system for intravascular thermal regulation. It uses a disposable start-up kit to interface a temperature-controlled sterile saline bath with an indwelling percutaneous catheter. The system monitors patient temperature via a probe and automatically adjusts saline bath temperature to reach a physician-set target. Used in OR, recovery, and intensive care settings by clinicians. The device provides temperature-controlled saline to the catheter to modulate patient body temperature. It features an upgraded compressor compared to the predicate for increased cooling power. Clinical benefit includes precise temperature management for neuro-critical and cardiac surgery patients.
Clinical Evidence
Safety and effectiveness for fever reduction were evaluated in a randomized controlled trial of 296 patients across four cohorts: cerebral infarction (CI), intracerebral hemorrhage (ICH), primary traumatic brain injury (PTBI), and subarachnoid hemorrhage (SAH). Mortality rates were compared between the Cool Line catheter group and a control group. Results showed no statistically significant differences in mortality (p-values ranging from 0.15 to 1.00).
Technological Characteristics
Integrated electro-mechanical heater/cooler system. Components: temperature monitor, controller unit, heat exchanger, and roller pump. Uses sterile saline as the heat exchange medium. Connectivity: interfaces with indwelling percutaneous catheters. Software-controlled thermal regulation.
Indications for Use
Indicated for cardiac surgery patients (normothermia maintenance) and neurosurgery patients (mild hypothermia induction/maintenance/reversal). Also indicated for fever reduction in intubated/sedated patients with cerebral infarction or intracerebral hemorrhage. Contraindicated for fever reduction in patients with subarachnoid hemorrhage or primary traumatic brain injury.
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
Alsius CoolGard 3000™/Alsius THERMOGARD™ thermal regulation system
Submission Summary (Full Text)
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Image /page/0/Picture/0 description: The image shows the logo for Alsius Corporation. The logo is in a serif font, with the letters "A" and "l" connected. The word "Corporation" is written in smaller letters below the word "Alsius".
# 072234
#### 510(k) Summary or 510(k) Statement 6
# 510(k) SUMMARY FOR ALSIUS CORPORTATION'S THERMOGARD XP AND CATHETER THERMAL REGULATION SYSTEM
# Submitter's Name, Address, Telephone Number, and Contact Person
ALSIUS CORPORATION 15770 Laguna Canyon Road, Suite 150 Irvine, CA 92618
Contact: Ken Collins Phone: (949)-453-0150 Fax: (949)-453-0250 Email: kcollins@alsius.com AUG 2 3 2007
# Name of Device
The THERMOGARD XP and Catheter Thermal Regulation System.
# Common or Usual Name
Central Venous Catheter (short term) and Thermal Requlating System.
# Classification Name
FDA has classified the Alsius THERMOGARD XP/Alsius heat exchange catheters as Class II devices under 21 C.F.R. §§ 870.5900 - System, Hypothermia, Intravenous, Cooling. Classification Product Code: NCX.
# Predicate Devices
The Alsius CoolGard 3000™/Alsius THERMOGARD™ thermal regulation system.
# Indications for Use
The THERMOGARD XP can be used with any of the Alsius Catheters. The indications for use are specific to the catheter. Please refer to the Indications for Use statement in the catheter specific Instructions for Use.
# Indications for Use (K030421, K051912, K052443)
The THERMOGARD XP/Alsius Catheter Thermal Regulation System, using either the lcy™ or Fortius™ model catheter, is indicated for use:
- . In cardiac surgery patients to achieve and or maintain normothermia during surgery and recovery/intensive care, and
15770 Laguna Canyon Road, Suite 150 Page 25 Irvine, California 92618
Tel: 949.453.0150 FAX: 949.453.0250
{1}------------------------------------------------
Company Confidential K07XXXX Thermogard XP
- To induce, maintain and reverse mild hypothermia in neurosurgery patients in . surgery and recovery/intensive care.
# Indications for Use (K014241, K051912)
The Alsius THERMOGARD XP™ and Cool Line™ Catheter Thermal Requlation System is indicated for use in fever reduction, as an adjunct to other antipyretic therapy, in patients with cerebral infarction and intracerebral hemorrhage who require access to the central venous circulation and who are intubated and sedated.
### Warning - Fever Reduction
The safety of this device has not been demonstrated for fever reduction in patients presenting with subarachnoid hemorrhage or primary traumatic brain injury. The safety and effectiveness of this device was examined in a randomized controlled trial of 296 patients. The mortality results reported in this trial, for the four patient cohorts enrolled, are presented in the table below (CI - cerebral infarction, ICH - intracerebral hemorrhage, PTBI – primary traumatic brain injury, SAH – subarachnoid hemorrhage).
| | Cool Line | | | Control | | | |
|------|-----------|----|------|---------|----|------|----------|
| | n | N | % | n | N | % | p-value* |
| CI | 3 | 16 | 18.8 | 3 | 14 | 21.4 | 0.74 |
| ICH | 8 | 33 | 24.2 | 7 | 27 | 25.9 | 1.00 |
| PTBI | 10 | 44 | 22.7 | 4 | 38 | 10.5 | 0.24 |
| SAH | 13 | 61 | 21.3 | 7 | 63 | 11.1 | 0.15 |
| Table 1-1. Mortality by Diagnosis (ITT) | | |
|------------------------------------------|--|--|
| | | |
*Fischer's exact test
For more details on the results of this study please refer to Physician's Manual – "Normothermia for the Neuro-critically III Stroke Patient" #101416-001.
#### Technical Characteristics
The THERMOGARD XP and Catheter Thermal Regulation System consists of the THERMOGARD XP, a disposable Start Up Kit used to interface between the cooling bath of the THERMOGARD XP and the intravascular Catheter. The THERMOGARD XP is an integrated electro-mechanical heater/cooler that consists of a temperature monitor, a temperature controller unit, a heat exchanger unit, and roller primo. It supplies temperature controlled sterile saline to the indwelling Catheter that is placed percutaneously in the patient.
The technical characteristics of the Catheter are identical to the predicate device.
Page 26
ALSIUS 510k Page 26 of 213
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Image /page/2/Picture/1 description: The image shows the logo for Alsius Corporation. The logo is in black and white and features the word "Alsius" in a stylized font. Below the word "Alsius" is the word "Corporation" in a smaller, less stylized font. The logo is simple and professional.
Company Confidential
- To induce, maintain and reverse mild hypothermia in neurosurgery patients in . surgery and recovery/intensive care.
# Indications for Use (K014241, K051912)
The Alsius THERMOGARD XP™ and Cool Line™ Catheter Thermal Regulation System is indicated for use in fever reduction, as an adjunct to other antipyretic therapy, in patients with cerebral infarction and intracerebral hemorrhage who require access to the central venous circulation and who are intubated and sedated.
# Warning - Fever Reduction
The safety of this device has not been demonstrated for fever reduction in patients presenting with subarach oid hemorrhage or primary traumatic brain injury. The safety and effectiveness of this device was examined in a fandomized controlled trial of 296 patients. The mortality results reported in this trial; for the four patient cohorts enrolled, are presented in the table below (CI - cerebral infarction, ICH - intracerebral hemorrhage, PTBI - primary traumatic brain injury, SAH - subarachnoid hemorrhage).
| | Cool Line | | | Control | | | |
|------|-----------|----|------|---------|----|------|----------|
| | n | N | % | n | N | % | p-value* |
| CI | 3 | 16 | 18.8 | 3 | 14 | 21.4 | 0.74 |
| ICH | 8 | 33 | 24.2 | 7 | 27 | 25.9 | 1.00 |
| PTBI | 10 | 44 | 22.7 | 4 | 38 | 10.5 | 0.24 |
| SAH | 13 | 61 | 21.3 | 7 | 63 | 11.1 | 0.15 |
| Table 1-1、Mortality by Diagnosis (ITT) | | | | |
|----------------------------------------|--|--|--|--|
|----------------------------------------|--|--|--|--|
*Fischer's exact test
For more details on the results of this study please refer to Physician's Manual - "Normothermia for the Neuro-critically III Stroke Patient" #101416-001.
# Technical Characteristics
The THERMOGARD XP and Catheter Thermal Regulation System consists of the THERMOGARD XP, a disposable Start Up Kit used to interface between the cooling bath of the THERMOGARD XP and the intravascular Catheter. The THERMOGARD XP is an integrated electro-mechanical heater/cooler that consists of a temperature monitor, a temperature controller unit, a heat exchanger unit, and roller pump. It supplies temperature controlled sterile saline to the indwelling Catheter that is placed percutaneously in the patient.
The technical characteristics of the Catheter are identical to the predicatedevice with the exception of revisions to the software that controls the device. (
15770 Laguna Canyon Road, Suite 150
Irvine, California 92618
Page 26
Tel: 949.453.0150 FAX: 949.453.0250
ALSIUS 510k Page 26 of 213
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Image /page/3/Picture/1 description: The image shows the logo for Alsius Corporation. The logo is in black and white and features the company name in a stylized font. The word "Alsius" is in a larger font than the word "Corporation", which is located below the first word.
Company Confidential
All models of Alsius Intravascular catheters are available for use with the THERMOGARD XP.
# Principles of Operation
The THERMOGARD XP system automatically adjusts the temperature of the heater/chiller saline bath to achieve the patient target temperature that has previously been set by the attending physician. This is done via data from a temperature probe in the patient that interfaces with the temperature controller. This principle of operation is identical to the predicate device.
# Summary of the Basis for Finding of Substantial Equivalence
The THERMOGARD XP System is substantially equivalent to the Alsius THERMOGARD™ heat exchange system in all its specifications except that its compressor allows additional cooling power.
# Conclusion
In summary, descriptive information and performance data demonstrate that the Alsius THERMOGARD XP and Catheter Thermal Regulation System characteristics do not raise new questions of safety and effectiveness. Where appropriate, performance data demonstrate equivalence. The system in this revision acts as its own predicate device. The THERMOGARD XP and Catheter Thermal Regulation System is safe and effective when used in accordance with the Directions For Use and substantially equivalent to the predicate device.
{4}------------------------------------------------
Image /page/4/Picture/1 description: The image shows the logo for the U.S. Department of Health & Human Services. The logo consists of a stylized eagle with three stripes forming its body and wings. The eagle is positioned in the center of a circular border. The text "DEPARTMENT OF HEALTH & HUMAN SERVICES • USA" is arranged around the border of the circle.
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
Alsius Corporation % Mr. Kenneth A. Collins Executive Vice President 15770 Laguna Canyon Road Suite 150 Irvine, California 92618
AUG 2 3 2007
Re: K072234
Trade/Device Name: Alsius THERMOGARD XP and Catheter Thermal Regulation System Regulation Number: 21 CFR 870.5900 Regulation Name: Thermal regulating system Regulatory Class: II Product Code: NCX Dated: August 7, 2007 Received: August 10, 2007
Dear Mr. Collins:
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.
If your device is classified (see above) into either class II (Special Controls) or class III (PMA), it may be subject to such 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); 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.
{5}------------------------------------------------
Page 2 - Mr. Kenneth A. Collins
This letter will allow you to begin marketing your device as described in your Section 510(k) premarket notification. The FDA finding of substantial equivalence of your device to a legally marketed predicate device results in a classification for your device and thus, permits your device to proceed to the market.
ff you desire specific advice for your device on our labeling regulation (21 CFR Part 801), please contact the Office of Compliance at (240) 276-0115. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21CFR Part 807.97). 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 (240) 276-3150 or at its Internet address http://www.fda.gov/cdrh/industry/support/index.html.
Sincerely yours,
Mark N. Melkerson
FOR
Director Division of General, Restorative and Neurological Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
{6}------------------------------------------------
# Indications for Use
510(k) Number (if known):
Device Name: Alsius THERMOGARD XP and Catheter Thermal Regulation System
Indications For Use:
Indications For Use:
# Alsius Thermogard - Indications for Use
The Alsius THERMOGARD XP and Cool Line ™ Catheter Thermal Regulation System is indicated for use in fever reduction, as an adjunct to other antipyretic therapy, in patients with cerebral infarction and intracerebral hemorrhage who require access to the central venous circulation and who are intubated and sedated.
# Warning - Fever Reduction
The safety of this device has not been demonstrated for fever reduction in patients presenting with subarrachnoid hemorrhage or primary traumatic brain injury. The safety and effectiveness of this device was examined in a randomized controlled trial of 296 patients. The mortality results reported in this trial, for the four patient cohorts enrolled, are presented in the table below (CI - cerebral infarction, ICH - intracerebral hemorrhage, PTBI – primary traumatic brain injury, SAH – subarrachnoid hemorrhage).
| | | Cool Line | | | | Control | | | |
|------|--|-----------|----|------|--|---------|----|------|------|
| | | n | N | % | | n | N | % | p* |
| CI | | 3 | 16 | 18.8 | | 3 | 14 | 21.4 | 0.74 |
| ICH | | 8 | 33 | 24.2 | | 7 | 27 | 25.9 | 1.00 |
| PTBI | | 10 | 44 | 22.7 | | 4 | 38 | 10.5 | 0.24 |
| SAH | | 13 | 61 | 21.3 | | 7 | 63 | 11.1 | 0.15 |
#### ートー【"4" 【 : . .
"Fischer's exact test
For more details on the clinical trial results please refer to Physician's Manual -"Normothermia for the Neuro-critically III stroke patient" #101416-001.
| Prescription Use _X_ | AND/OR | Over-The-Counter Use _____ |
|-----------------------------|--------|----------------------------|
| (Part 21 CFR 801 Subpart D) | | (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)
(Division Sign-Off)
Division of General, Restorative, and Neurological Devices
| 510(k) Number | L072234 |
|----------------|-------------|
| Page 10 of 213 | Page 1 of 2 |
{7}------------------------------------------------
# Indications for Use
510(k) Number (if known):
Device Name: Alsius THERMOGARD XP and Catheter Thermal Regulation System Indications For Use:
# Fortius and Icy Catheters - Indications for Use
The Alsius THERMOGARD XP/Alsius Catheter Thermal Regulation System, using either the Icy™ or Fortius™ model catheter, is indicated for use:
- . in cardiac surgery patients to achieve and or maintain normothermia during surgery and recovery/intensive care, and
- to induce, maintain and reverse mild hypothermia in neurosurgery patients in . surgery and recovery/intensive care.
Prescription Use X
AND/OR
Over-The-Counter Use (21 CFR 807 Subpart C)
(Part 21 CFR 801 Subpart D)
(PLEASE DO NOT WRITE BELOW THIS LINE-CONTINUE ON ANOTHER PAGE IF NEEDED)
Concurrence of CDRH, Office of Device Evaluation (ODE)
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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.
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.
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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.