K970197 · Adroit Medical Systems, Inc. · ILO · Sep 10, 1997 · Physical Medicine
Device Facts
Record ID
K970197
Device Name
HTP-1500 LOCALIZED HEAT THERAPY PUMP
Applicant
Adroit Medical Systems, Inc.
Product Code
ILO · Physical Medicine
Decision Date
Sep 10, 1997
Decision
SESE
Submission Type
Traditional
Regulation
21 CFR 890.5720
Device Class
Class 2
Attributes
Therapeutic
Indications for Use
The HTP-1500 Localized Heat Therapy Pump is intended for use in those situations where a physician determines that heat therapy is necessary or desirable. CAUTION: Federal law restricts this device to sale by or on the order of a physician.
Device Story
HTP-1500 is an electronically controlled water heater/pump for localized heat therapy. System includes water reservoir, electric resistance heater, heat exchanger, pump, and tubing connecting to an external pad. Operator uses membrane keypad to select temperature; digital display shows set point and actual water temperature. Microprocessor-based controller regulates heater to maintain desired temperature. Used in clinical settings to provide heat therapy for orthopedic conditions and trauma. Benefits include controlled, consistent heat delivery to affected areas to alleviate pain and muscle spasms.
Clinical Evidence
No clinical data. Substantial equivalence is based on intended use and device characteristics/specifications.
Technological Characteristics
Polypropylene housing; 115V/60Hz power; 200W electric resistance heater; digital solid-state microprocessor-based control system; 1.5L reservoir; 10-14 GPH flow rate. Safety features include software-based primary limit thermostat (109°F) and hardware-based secondary limit thermostat (115°F +/- 5°F).
Indications for Use
Indicated for patients requiring heat therapy for orthopedic conditions (lower back pain, strains, acute injuries, chronic pain, muscle spasm, tendonitis, arthritis) or skin trauma/medical issues (bruises, contusions, abscesses, boils, burns, infection, phlebitis, I.V. infiltration, neuritis).
Regulatory Classification
Identification
A water circulating hot or cold pack is a device intended for medical purposes that operates by pumping heated or chilled water through a plastic bag and that provides hot or cold therapy for body surfaces.
Special Controls
*Classification.* Class II (special controls). The device is exempt from the premarket notification procedures in subpart E of part 807 of this chapter subject to § 890.9.
Predicate Devices
MICRO-TEMP model SMS-1000
MICRO-TEMP model SMS-2000
Submission Summary (Full Text)
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SEP 10 1997
510(k) Summary
a(1) Submitted by: Adroit Medical Systems, Inc.
1146 Carding Machine Rd.
Loudon, TN 37774
423-458-8600
*K970197*
Contact Person: Richard L. Studer
423-458-8600
Prepared on: January 17, 1997
a(2) Proprietary Name: HTP-1500 Localized Heat Therapy Pump
Common Name: Heat Therapy Pump
Classification Name: Water Circulating Hot or Cold Pack
a(3) Adroit Medical Systems, Inc. believes that the HTP-1500 Localized Heat Therapy Pump is substantially equivalent to the MICRO-TEMP models SMS-1000 and SMS-2000 Localized Heat Therapy Pumps which are currently distributed by Seabrook Medical Systems, Inc.
a(4) The HTP-1500 Localized Heat Therapy Pump is a small electronically controlled electric water heater containing a water reservoir, an electric resistance heater, a heat exchanger, an integral electric pump and associated tubing, hoses and fittings that allow it to be connected to a separate external pad. In use, the pump circulates water from the reservoir through the heat exchanger, associated tubing, hoses and fittings into and through the external pad. The operator, using a membrane switch keypad, selects the desired water temperature as observed and confirmed on a digital display. The electronic controller selectively turns on and off the electric resistance heater to heat the heat exchanger, thereby heating the water to the desired temperature. The actual water temperature is monitored and displayed on the digital display.
Included in this section is a three dimensional drawing of the HTP-1500 Localized Heat Therapy Pump showing the control panel, water reservoir fill cap, folding handle, water level viewing window, power switch, hose for connection to the pad, and the location of the power cord; and a schematic representation of an HTP-1500 connected to a pad.
510(k) Summary page # 1 of 5
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510(k) Summary page # 2 of 5
a(5) The HTP-1500 Localized Heat Therapy Pump is intended for use in those situations where a physician determines that heat therapy is necessary or desirable.
Localized heat therapy is of particular benefit in, but not limited to, orthopedic conditions such as lower back pain, strains, acute injuries, chronic pain, muscle spasm, tendonitis, and arthritis. Heat therapy is also sometimes prescribed for skin trauma (bruises, contusions, abscesses, boils, burns) and other medical problems like infection, phlebitis, I.V. infiltration, and neuritis.
a(6) The HTP-1500 Localized Heat Therapy Pump and the SMS-1000 and SMS-2000 MICRO-TEMP heat therapy pumps have substantially equivalent technological characteristics in that each use electrical resistance heaters to heat water, a solid state controller to control the temperature of the water, and an electric pump to circulate the water through a pad. This fact is further supported by the “SPECIFICATION COMPARISON” table included with this section.
b This section is not required for this submission because substantial equivalence is based on intended use and device characteristics and specifications, and not on an assessment of performance data.
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HTP-1500
SHOWN WITH HOSE AND POWER CORD
IN STORAGE POSITION

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Pad
HTP-1500
HTP-1500 Hookup To Pad
Note: Bi-directional Water Flow
510(k) Summary page # 4 of 5
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SPECIFICATION COMPARISON
| | Adroit HTP-1500 | Seabrook SMS-2000 | Seabrook SMS-1000 |
| --- | --- | --- | --- |
| Physical | | | |
| Size | 7" Diameter, 8.5" High | 8.5" Wide, 6.0625" Deep, 5.75" High | 8.5" Wide, 6.0625" Deep, 5.75" High |
| Weight (empty) | 7 Pounds | 5.25 Pounds | 4.7 Pounds |
| Connector Fitting Type | Quick-Connect | Quick-Connect | Quick-Connect |
| Housing Material | Polypropylene | G.E. Noryl Plastic | G.E. Noryl Plastic |
| Housing Color | Off White | Off White | Off White |
| Electrical System | | | |
| Voltage | 115 Volt, 60 Hz. | 115 Volt, 60 Hz. | 115 Volt, 60 Hz. |
| Current | 2.2 Amp. | 1.75 Amp. | 1.75 Amp. |
| Fuse | 3 Amp., Type 3AG | 3 Amp., Type 3AG | 3 Amp., Type 3AG |
| Power Cord | 3 Conductor, 18 AWG, 10 Feet Long, Hospital Grade Plug | 3 Conductor, 18 AWG, 10 Feet Long, Hospital Grade Plug | 3 Conductor, 18 AWG, 10 Feet Long, Hospital Grade Plug |
| Leakage Current | Less Than 50 Microamp | Less Than 50 Microamp | Less Than 50 Microamp |
| Heating System | | | |
| Temperature Range | 75 °F to 107 °F | 78 °F to 107 °F | 86 °F to 107 °F |
| Heating Element | 200 Watts | 150 Watts | 150 Watts |
| Control System | | | |
| Type | Digital, Solid State (Microprocessor based) | Digital, Solid State (Microprocessor based) | Analog, Solid State |
| Accuracy | +/- 1 °F (95 °F to 107 °F) | +/- 1 °F (Range ??) | +/- 1 °F (Range ??) |
| Self-Calibrating | No | Yes | Yes |
| Set Point Read Out | Digital Display | Digital Display | Analog Dial |
| Water Temperature Readout | Digital Display | Digital Display | None |
| Water Temperature Display Range | 32 °F to 122 °F | 31 °F to 121 °F | None |
| Safety Range | | | |
| Primary Limit Thermostat | Software Set at 109 °F | Hardware set at 113 °F +/- 3 °F | Hardware set at 113 °F +/- 3 °F |
| Secondary Limit Thermostat | Hardware set at 115 °F +/- 5 °F | Hardware set at 117 °F +/- 5 °F | Hardware set at 117 °F +/- 5 °F |
| Warning Lights | Flashing Display for Over Temperature | Light for Low Water and Over Temperature | Light for Low Water and Over Temperature |
| Audible Alarms | Over Temperature | Low Water and Over Temperature | None |
| Circulating System | | | |
| Reservoir Capacity | 1.5 Liter (50.72) | 0.89 Liter (30 Ounces) | 0.89 Liter (30 Ounces) |
| Reservoir Fluid | Distilled Water | Distilled Water | Distilled Water |
| Fill Cap | Vented | Vented | Vented |
| Flow Rate Through Pad | 10 to 14 GPH Average | 10 to 14 GPH Average | 10 to 14 GPH Average |
510(k) Summary page # 5 of 5
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DEPARTMENT OF HEALTH & HUMAN SERVICES
Public Health Service
Food and Drug Administration
9200 Corporate Boulevard
Rockville MD 20850
SEP 10 1997
Mr. Richard L. Studer
*Adroit Medical Systems, Inc.*
P.O. Box 277
Loudon, Tennessee 37774
Re: K970197
HTP-1500 Localized Heat Therapy Pump
Regulatory Class: II
Product Code: ILO
Dated: July 15, 1997
Received: July 16, 1997
Dear Mr. Studer:
We have reviewed your Section 510(k) notification of intent to market the device referenced above and we have determined the device is substantially equivalent (for the indications for use stated in the enclosure) to 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). 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 (Premarket Approval), 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 895. A substantially equivalent determination assumes compliance with the current Good Manufacturing Practice requirement, as set forth in the Quality System Regulation (QS) for Medical Devices: General regulation (21 CFR Part 820) and that, through periodic (QS) inspections, the Food and Drug Administration (FDA) will verify such assumptions. Failure to comply with the GMP regulation may result in regulatory action. In addition, FDA may publish further announcements concerning your device in the Federal Register. Please note: this response to your premarket notification submission does not affect any obligation you might have under sections 531 through 542 of the Act for devices under the Electronic Product Radiation Control provisions, or other Federal laws or regulations.
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Page 2 - Mr. Richard L. Studer
This letter will allow you to begin marketing your device as described in your 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.
If you desire specific advice for your device on our labeling regulation (21 CFR Part 801 and additionally 809.10 for in vitro diagnostic devices), please contact the Office of Compliance at (301) 594-4659. Additionally, for questions on the promotion and advertising of your device, please contact the Office of Compliance at (301) 594-4639. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21 CFR 807.97). Other general information on your responsibilities under the Act may be obtained from the Division of Small Manufacturers Assistance at its toll-free number (800) 638-2041 or (301) 443-6597 or at its internet address "http://www.fda.gov/cdrh/dsmamain.html".
Sincerely yours,

Celia M. Witten, Ph.D., M.D.
Director
Division of General and
Restorative Devices
Office of Device Evaluation
Center for Devices and
Radiological Health
Enclosure
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Page 1 of 1
510(k) Number (if known): ___________________________
Device Name: HTP-1500 Localized Heat Therapy Pump
Indications For Use:
The HTP-1500 Localized Heat Therapy Pump is intended for use in those situations where a physician determines that heat therapy is necessary or desirable.
**CAUTION:** Federal law restricts this device to sale by or on the order of a physician.
(PLEASE DO NOT WRITE BELOW THIS LINE - CONTINUE ON ANOTHER PAGE IF NEEDED)

Prescription Use ☑ (Per 21 CFR 801.109)
OR
Over-The Counter Use ☐
(Optional Format 1-2-96)
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
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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.
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.