The SCD Express" system is designed to apply intermittent pneumatic compression to the lower limbs to help prevent deep vein thrombosis in patients at risk.
Device Story
SCD Express™ Portable Compression System (PCS) is an intermittent pneumatic compression device for DVT prophylaxis. System comprises a controller, tubing sets, and single-patient use garments (leg sleeves or foot cuffs). Controller applies sequential, gradient pressure to limbs; measures limb refill time to optimize compression intervals. Designed for hospital use; portable, battery-powered, compact, and quiet. Enables continuous prophylaxis throughout patient risk period. Supports mixed configurations (e.g., foot cuff on one limb, sleeve on other). Healthcare providers use system to enhance venous blood flow; output is mechanical compression. Benefits include reduced risk of DVT and pulmonary embolism, and management of edema, venous stasis, and extremity pain.
Clinical Evidence
Bench testing only. Biocompatibility testing performed in accordance with ISO 10993-1 and FDA memorandum G95-1.
Technological Characteristics
Intermittent pneumatic compression system. Components: controller, tubing, disposable leg sleeves (up to 3 bladders) or single-bladder foot garments. Energy source: battery/AC power. Features: sequential gradient compression, limb refill time measurement. Biocompatibility: meets ISO 10993-1 standards.
Indications for Use
Indicated for patients at risk of deep vein thrombosis and pulmonary embolism for circulation enhancement, acute/chronic edema, extremity pain incident to trauma or surgery, leg ulcers, and venous stasis/insufficiency. Used for leg and foot compression.
Regulatory Classification
Identification
A compressible limb sleeve is a device that is used to prevent pooling of blood in a limb by inflating periodically a sleeve around the limb.
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# 510(k) Summary
# JUN 2 8 2004
# SCD Express™ Portable Compression System (PCS)
In accordance with section 513(1) of the SMDA and as defined in 21 CFR Part 807.3 final rule dated December 14, 1994, this summary is submitted by:
Tvco Healthcare/Kendall 15 Hampshire Street Mansfield, MA 02048 Date Prepared: February 26, 2004
# Contact Person 1.
Bridget Gardner Manager, Regulatory Affairs (508)-261-6384
# 2. Name of Medical Device
| Classification Name: | Sleeve, Limb, Compressible |
|-----------------------|------------------------------------------------|
| Common or Usual Name: | Compressible Limb Sleeve Device |
| Trade Name: | SCD Express™ Portable Compression System (PCS) |
# 3. Identification of Legally Marketed Device
The proposed SCD Express" Controller and Foot Cuff are substantially equivalent in intended use, function and mode of operation to the currently marketed SCD Response™ Compression System (K992079) and Novamedix AVImpad (K953648).
# 4 . Device Description
The SCD Express™ Controller is an intermittent pneumatic compression device for applying sequential, gradient pressure to a patient's legs for the prevention of Deep Vein Thrombosis (DVT). This new SCD Express™ system has the potential to provide uninterrupted DVT prophylaxis as it is used throughout the hospital, and it can be worn and used continuously by the patient during the entire period of risk.
The SCD Express" system has been designed to be more compact, quieter, lightweight, and offer battery power. Additional features also include the ability to provide sequential, gradient compression to each limb individually and the flexibility to provide compression to various sleeves consisting of up to three bladders each.
The SCD Express™ Controller will also have the potential to be used as a compression foot device. A new feature for an SCD-based system, the SCD Express™ Foot Cuff will provide DVT prophylaxis in situations that allow for a wrap only on the foot due to obstacles on the leg (e.g., surgery). In addition, the product has been designed to have the capability of providing high pressure, compression to a foot garment. In this configuration, the SCD Express™ system would still include the controller and a pair of tubing sets, but a pair of single patient use, single bladder disposable foot garments would be used in place of the aforementioned sleeves. The SCD Express " system will also allow for mixed configurations where a foot garment could be used on one limb while a sleeve was used on the other.
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# റ Device Intended Use
The SCD Express" system is designed to apply intermittent pneumatic compression to the lower limbs to help prevent deep vein thrombosis in patients at risk.
Indications for use:
- · Circulation Enhancement
- · Deep Vein Thrombosis Prophylaxis
- Edema Acute
- Edema Chronic
- · Extremity Pain Incident to Trauma or Surgery
- · Leg Ulcers
- · Venous Stasis / Venous Insufficiency
# 6. Product Comparison
The SCD Express™ Controller and the SCD Response™ Compression System (K992079) as well as the SCD Express™ PCS Foot Cuff to the Novamedix AVImpad (K953648) are substantially equivalent in intended use, function and mode of operation.
#### 7. Nonclinical Testing
Biocompatibility testing of the proposed device has demonstrated that it meets the requirements of guidelines presented in the 10993 ISO Standard, Part 1, with the FDA modified matrix presented in memorandum G95-1.
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Public Health Service
Image /page/2/Picture/2 description: The image shows the seal of the Department of Health & Human Services (HHS). The seal features the department's name encircling a stylized caduceus symbol. The caduceus is represented by three abstract, wavy lines, resembling a stylized human form. The text reads "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA".
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
JUN 2 8 2004
Tyco Heathcare/Kendall c/o Ms. Bridget Gardner Manager, Regulatory Affairs 15 Hampshire Street Mansfield, MA 02048
Re: K040511
Kendall SCD Express™ Compression System Regulation Number: 21 CFR 870.5800 Regulation Name: Compressible Limb Sleeve Regulatory Class: Class II (two) Product Code: JOW Dated: February 26, 2004 Received: February 27, 2004
Dear Ms. Gardner:
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 for ass surver 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 r ou may, therefore, while 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 rr your de rice 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, I'DA may publish further announcements concerning your device in the Federal Register.
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Page 2 – Ms. Bridget Gardner
Please be advised that FDA's issuance of a substantial equivalence determination does not mean I lease of advised that I Drivinsion that your device complies with other requirements of the Act that I DI Hab made a and regulations administered by other Federal agencies. You must or any I ederal station and 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 form in the qualis) 37800 provisions (Sections 531-542 of the Act); 21 CFR 1000-1050. product radiation on to begin marketing your device as described in your Section 510(k) This letter will and in yours of substantial equivalence of your device to a legally prematics notification "cresults 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), please If you usee office of Compliance at (301) 594-4646. Additionally, for questions on the vromotion 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 (2017) 971 1057. Theo, pressent 807.97) you may obtain. Other general information on your presponsibilities under the Act may be obtained from the Division of Small Manufacturers, Itsponsional and Consumer Assistance at its toll-free number (800) 638-2041 or (301) 443-6597 or at its Internet address http://www.fda.gov/cdrh/dsma/dsmamain.html
Sincerely yours,
Dvina D. Vochner
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 (if known): K040511
Device Name: Kendall SCD Express™ Compression System
Indications For Use:
The SCD EXPRESS*Compression System is designed to increase venous blood flow in at-risk patients in order to help prevent deep vein thrombosis and pulmonary embolism. The System consists of the Controller, the Tubing Sets (provided with the Controller) and single-patient use garments (purchased separately from this Controller). The garments, both leg sleeves and foot cuffs, compress the limbs to enhance venous blood movement. After the compression, the Controller measures the time it takes for the limbs to refill with blood and waits that period of time before the next compression is initiated.
The use of the SCD EXPRESS Compression System with Foot Cuffs is also indicated for: (a) circulation enhancement, (b) edema -- acute, (c) edema -- chronic, (d) extremity pain incident to trauma or surgery, (e) leg ulcers, and (f) venous stasis /venous insufficiency.
Prescription Use _ V (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)
Dunia P. Vachner
(Division Sign-Off) Division of Cardiovascular Devices
510(k) Number_K04051
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.