K152434 · Entellus Medical, Inc. · LRC · Nov 20, 2015 · Ear, Nose, Throat
Device Facts
Record ID
K152434
Device Name
XprESS Multi-Sinus Dilation System
Applicant
Entellus Medical, Inc.
Product Code
LRC · Ear, Nose, Throat
Decision Date
Nov 20, 2015
Decision
SESE
Submission Type
Traditional
Regulation
21 CFR 874.4420
Device Class
Class 1
Attributes
Therapeutic, Pediatric
Indications for Use
To access and treat the maxillary ostia/ethmoid infundibula in patients 2 years and older, and frontal ostia/recesses and sphenoid sinus ostia in patients 12 years and older using a trans-nasal approach. The bony sinus outflow tracts are remodeled by balloon displacement of adjacent bone and paranasal sinus structures.
Device Story
Trans-nasal balloon dilation system for sinus outflow tract remodeling. Device features curved suction tip, frontal ostium seeker, and re-shapeable distal end for multi-sinus access. Physician tracks device to sinus ostium via endoscopic visualization; balloon displacement remodels bony sinus outflow tracts. Includes inflation syringe, bending tool, extension lines, and optional LED light fiber or Tuohy adapter. Used in clinical settings by physicians. Provides active suction or irrigation via proximal barbed fitting. Single-use, sterile device.
Clinical Evidence
Prospective, multicenter, single-arm study (IDE G140080) in 50 subjects aged 2-21 years. 157 sinus dilations attempted. Primary endpoints: procedural technical success rate (100%) and complication rate (0%). No device-related adverse events reported.
Technological Characteristics
Manual surgical instrument; balloon dilation principle. Materials, biocompatibility, packaging, shelf life, and sterilization are identical to predicate. Features re-shapeable distal tip, suction/irrigation ports, and balloon inflation mechanism. Sterile, single-use.
Indications for Use
Indicated for maxillary ostia/ethmoid infundibula treatment in patients ≥2 years; frontal ostia/recesses and sphenoid sinus ostia treatment in patients ≥12 years. Trans-nasal approach. No known contraindications.
Regulatory Classification
Identification
An ear, nose, and throat manual surgical instrument is one of a variety of devices intended for use in surgical procedures to examine or treat the bronchus, esophagus, trachea, larynx, pharynx, nasal and paranasal sinus, or ear. This generic type of device includes the esophageal dilator; tracheal bistour (a long, narrow surgical knife); tracheal dilator; tracheal hook; laryngeal injection set; laryngeal knife; laryngeal saw; laryngeal trocar; laryngectomy tube; adenoid curette; adenotome; metal tongue depressor; mouth gag; oral screw; salpingeal curette; tonsillectome; tonsil guillotine; tonsil screw; tonsil snare; tonsil suction tube; tonsil suturing hook; antom reforator; ethmoid curette; frontal sinus-rasp; nasal curette; nasal rasp; nasal rongeur; nasal saw; nasal scissors; nasal snare; sinus irrigator; sinus trephine; ear curette; ear excavator; ear rasp; ear scissor, ear snare; ear spoon; ear suction tube; malleous ripper; mastoid gauge; microsurgical ear chisel; myringotomy tube inserter; ossici holding clamp; sacculotomy tack inserter; vein press; wire ear loop; microrule; mirror; mobilizer; ear, nose, and throat punch; ear, nose and throat knife; and ear, nose, and throat trocar.
{0}------------------------------------------------
Image /page/0/Picture/1 description: The image shows the logo for the U.S. Department of Health & Human Services. The logo consists of a circular seal with the text "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" around the perimeter. Inside the circle is an abstract symbol that resembles an eagle or a bird in flight, composed of three stylized human profiles facing to the right.
Food and Drug Administration 10903 New Hampshire Avenue Document Control Center - WO66-G609 Silver Spring, MD 20993-0002
November 20, 2015
Entellus Medical, Inc. Ms. Karen Peterson Vice President, Clinical, Regulatory and Quality 3600 Holly Lane North. Suite 40 Plymouth, MN 55447
Re: K152434
Trade/Device Name: XprESS Multi-Sinus Dilation System Regulation Number: 21 CFR 874.4420 Regulation Name: Ear, Nose, and Throat Manual Surgical Instrument Regulatory Class: Class I Product Code: LRC Dated: October 27, 2015 Received: October 28, 2015
Dear Ms. Peterson:
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.
{1}------------------------------------------------
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 devicerelated 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 contact the Division of Industry and Consumer Education at its toll-free number (800) 638-2041 or (301) 796-7100 or at its Internet address
http://www.fda.gov/MedicalDevices/ResourcesforYou/Industry/default.htm. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21 CFR 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 Industry and Consumer Education at its toll-free number (800) 638-2041 or (301) 796-7100 or at its Internet address
http://www.fda.gov/MedicalDevices/ResourcesforYou/Industry/default.htm.
Sincerely yours.
# Eric A. Mann -S
for Malvina B. Eydelman, M.D. Director Division of Ophthalmic and Ear, Nose and Throat Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
{2}------------------------------------------------
# Indications for Use
510(k) Number (if known) K152434
Device Name XprESS Multi-Sinus Dilation System
#### Indications for Use (Describe)
To access and treat the maxillary ostia/ethmoid infundibula in patients 2 years and older, and frontal ostia/recesses and sphenoid sinus ostia in patients 12 years and older using a trans-nasal approach. The bony sinus outflow tracts are remodeled by balloon displacement of adjacent bone and paranasal sinus structures.
Type of Use (Select one or both, as applicable)
2 Prescription Use (Part 21 CFR 801 Subpart D)
_ Over-The-Counter Use (21 CFR 801 Subpart C)
### PLEASE DO NOT WRITE BELOW THIS LINE - CONTINUE ON A SEPARATE PAGE IF NEEDED.
#### FOR FDA USE ONLY
Concurrence of Center for Devices and Radiological Health (CDRH) (Signature)
This section applies only to requirements of the Paperwork Reduction Act of 1995.
#### *DO NOT SEND YOUR COMPLETED FORM TO THE PRA STAFF EMAIL ADDRESS BELOW.*
The burden time for this collection of information is estimated to average 79 hours per response, including the time to review instructions, search existing data sources, gather and maintain the data needed and complete and review the collection of information. Send comments regarding this burden estimate or any other aspect of this information collection, including suggestions for reducing this burden, to:
> Department of Health and Human Services Food and Drug Administration Office of Chief Information Officer Paperwork Reduction Act (PRA) Staff PRAStaff(@fda.hhs.gov
"An agency may not conduct or sponsor, and a person is not required to respond to, a collection of information unless it displays a currently valid OMB number."
{3}------------------------------------------------
Image /page/3/Picture/0 description: The image shows the logo for "entellus MEDICAL". To the left of the company name is a circular graphic made up of blue and black curved shapes. The company name is in black font, with the word "entellus" on top of the word "MEDICAL", which is in a smaller font size.
510(k) Summary
Date Prepared: Submitter Information: August 26, 2015 Entellus Medical, Inc. 3600 Holly Lane North, Suite 40 Plymouth, MN 55447
Establishment Registration:
Contact Information:
Device Information: Trade Name: Common Name: Classification Name: Product Code: Regulation Number: 3006345872
Karen E. Peterson Vice President Clinical, Regulatory and Quality (763) 463-7066 kpeterson@entellusmedical.com
XprESS Multi-Sinus Dilation System [K142252]
XprESS Multi-Sinus Dilation System Balloon Sinus Dilation System ENT Manual Surgical Instrument LRC Class I, 21 CFR 874.4420
Predicate Device:
# Device Description:
The XprESS Multi-Sinus Dilation System is intended to recreate the sinus outflow tract via trans-nasal balloon dilation. The XprESS device combines features of a curved suction tip and a frontal ostium seeker with the tissue expansion effect of balloon dilation. The familiar features of this device enable a physician to track the device to the sinus ostium using endoscopic visualization. Since the distal end of the device is re-shapeable, one balloon can be modified to work on multiple sinuses within the same patient.
Image /page/3/Figure/13 description: This image shows a medical device with several labeled parts. The device has a long, thin body with a curved suction tip at one end. A balloon slide mechanism is located along the body of the device. At the opposite end, there is a proximal barbed fitting and a balloon inflation luer.
XprESS Multi-Sinus Dilation Device
The XprESS curved suction tip has an atraumatic ball tip. A suction tube may be connected to the proximal barbed fitting to provide active suction by covering the suction vent. An Extension Line connected to a syringe may be connected to the proximal barbed fitting to provide irrigation. The device was designed to prevent fluid from exiting the suction vent during irrigation. The XprESS Multi-Sinus Dilation System is provided sterile and for single use only.
The Xpress Multi-Sinus Dilation System includes the XprESS device, Inflation Syringe, Bending Tool and two Extension Lines. The XprESS LoProfile and Ultra Multi-Sinus Dilation Systems also include the PathAssist LED Light Fiber. The XprESS Pro Multi-Sinus Dilation System also includes a Tuohy Adapter.
{4}------------------------------------------------
XprESS is available in the following suction tip sizes and balloon sizes. All suction tips and balloon lengths are appropriate for treating all sinuses; selection is based on physician preference.
| XprESS Pro | XprESS LoProfile | XprESS Ultra |
|----------------------------------|--------------------------------------|--------------------------------------|
| Standard Suction Tip | LoProfile Suction Tip | Ultra Suction Tip |
| (2mm ball tip, 1mm ID, 1.5mm OD) | (1.75mm ball tip, 0.7mm ID, .2mm OD) | (1.5mm ball tip, 0.5mm ID, 1.0mm OD) |
| Balloon Diameter x Length (mm) | Balloon Diameter x Length (mm) | Balloon Diameter x Length (mm) |
| NA | 5 x 8 | 5 x 8 |
| 5 x 18 | 5 x 18 | 5 x 20 |
| 6 x 8 | 6 x 8 | 6 x 8 |
| 6 x 18 | 6 x 18 | 6 x 20 |
| 7 x 18 | 7 x 18 | NA |
The XprESS Multi-Sinus Dilation System has been tested to withstand multiple inflations and device tip manipulations in a surgical case wherein all 6 sinus ostia are being dilated.
# Indication for Use:
To access and treat the maxillary ostia/ethmoid infundibula in patients 2 years and older, and frontal ostia/recesses and sphenoid sinus ostia in patients 12 years and older using a trans-nasal approach. The bony sinus outflow tracts are remodeled by balloon displacement of adjacent bone and paranasal sinus structures.
## Contraindications:
None known.
# Technological Characteristics:
The XprESS device has expanded indications for use, identical intended use, and identical scientific technology (i.e., principle of operation, design, function, materials, biocompatibility, packaging, shelf life, and sterilization) as the predicate device.
### Substantial Equivalence:
The XprESS device has expanded indications for use, identical intended use, and identical fundamental scientific technology as the predicate device. The XprESS device is substantially equivalent to the predicate device.
### Performance Data:
Performance testing of the XprESS device consisted of clinical testing to support the expanded indications for use. A prospective, multicenter, single-arm study investigating the use of XprESS in patients aged 2-21 years was conducted in the United States under IDE G140080. The primary outcome measures were procedural technical success rate and complication rate. A total of 157 sinus dilations were attempted in 50 subjects. All 157 attempts were successfully completed for an overall XprESS technical success rate of 100%. No complications (0%) were reported during the study. In addition, no adverse events related to the device or the balloon dilation procedure were reported during the study. Performance testing showed that the device performed as intended.
# Conclusion:
In conclusion, the technological characteristics are identical the predicate device. Performance testing has demonstrated that the device is safe and effective and that its performance is substantially equivalent to the predicate device.
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.