As stated on Label: Contact medium for ultrasonic and electrical transmission gel. Konix® Sterile Gel is sterilized by gamma irradiation and intended for use in all diagnostic ultrasound procedures that currently use an ultrasound coupling gel or other fluid, alone or in combination with a transducer cover, where sterility and in vivo biocompatibility are required. It can be used on the skin where the risk for infections is especially high, especially with open tissue Doppler applications; and can be used for cystoscopic and vaginal Doppler and ultrasound examinations. Konix® Sterile Gel can be used on the skin or in open tissue where there is a risk for infections, such as in open tissue Doppler applications. It can be used during surgery; for cystoscopic and vaginal ultrasound and Doppler examinations; for cardiac surgery and ultrasound procedures; and as a lubricant in biopsy applications.
Device Story
Konix® Sterile Gel is a sterile, biocompatible, polymer-based coupling agent used to facilitate sound wave transmission between medical imaging transducers and patient tissue. It is applied by clinicians during diagnostic ultrasound procedures, including intraoperative, intracavitary, and biopsy applications. The gel acts as a conductive medium to minimize acoustic impedance mismatch and reflection losses. It is supplied in single-use, gamma-irradiated foil sachets to maintain sterility in high-risk clinical environments. By ensuring optimal acoustic coupling, the gel enables clear diagnostic imaging, assisting physicians in clinical decision-making during surgical and diagnostic interventions. The device is intended for professional use in clinical settings.
Clinical Evidence
Bench testing only. Acoustic performance testing confirmed impedance (1.49 kg/m²s) and speed of sound (1516 m/s) are comparable to human dermis and predicate performance. Biocompatibility testing (cytotoxicity, sensitization, irritation, and systemic toxicity) followed standard protocols and yielded negative results. Sterility and shelf-life were validated through microbial testing and 3-year stability studies.
Technological Characteristics
Polymer-based aqueous gel; ingredients include carbomer, triethanolamine, monopropylene glycol, and isothiazolinone preservatives. pH 6.5-7.5; density 0.683-1.283 g/cm³. Gamma-irradiated for sterility. Packaged in single-use polyester/aluminum/polyethylene sachets. Non-cytotoxic, non-sensitizing, water-soluble, and non-staining.
Indications for Use
Indicated for use as a sterile contact medium for diagnostic ultrasound and electrical transmission procedures. Suitable for patients requiring sterile applications, including surgical procedures, biopsies, cystoscopic/vaginal examinations, and open tissue Doppler applications where infection risk is elevated.
Regulatory Classification
Identification
A diagnostic ultrasonic transducer is a device made of a piezoelectric material that converts electrical signals into acoustic signals and acoustic signals into electrical signals and intended for use in diagnostic ultrasonic medical devices. Accessories of this generic type of device may include transmission media for acoustically coupling the transducer to the body surface, such as acoustic gel, paste, or a flexible fluid container.
Predicate Devices
Sterile Aquasonic® 100 Ultrasound Gel (Parker Laboratories)
Submission Summary (Full Text)
{0}------------------------------------------------
K130581
Page 1 of 6
### 510(k) SUMMARY OF SAFETY AND EFFECTIVENESS [21 CFR 807.92(c)]
Date Summary Was Prepared:
June 13, 2014
### Submitter:
Official Contact Person: On Behalf of:
Ronald J. Amen, Ph.D Turkuaz SaglikHizmetleriMedikalTemizlik Kimyasal Urunleri San.Ve Tic. Ltd. Sti. SaadetdereMah. 67 Sok No: 3 Esenvurt ISTANBUL TR-34513 Turkey 90-212-4286848 Contacts: Nurhan Irmak
JUN 1 8 2014
### Device [807.92(a)(2)]:
Trade or Proprietary Name: Common or Usual Name: Classification Name: (UCD) Product Code: Regulation Number: Device Class Classification Panel
KONIX® Sterile Gel Sterile Ultrasound Gel Transducer, Ultrasonic, Diagnostic
MUI 21 CFR 892.1570 Class II Radiology
By Prescription Only
### Predicate Device [80792(a)(3)]:
KONIX® Sterile Gel is substantially equivalent to: Sterile Aquasonic® 100 Ultrasound Gel (Parker Laboratories)
### Description of the Device [807.92(a)(4)]:
Konix® Sterile Gel is an in vivo biocompatible sterile couplant intended for use as a scanning gel in surgical procedures, biopsies and similar sterile applications. It is used to couple sound waves between the patient and medical imaging electronic transducers during intraoperative and intracavitary medical diagnostic ultrasound imaging procedures such as transcutaneous ultrasound image guided biopsy and aspiration, doppler examinations of organ and tissue intraoperative ultrasound imaging, intra-cavity ultrasound imaging, and gel infusion sonography.
Page 1
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Maior characteristics include:
- No toxic effects; produced as a completely harmiess material .
- Hypoallergenic; non-irritating; no cytotoxicity .
- Water soluble, non-staining and easily cleanable
- Does not contain any lipid components .
- Free from formaldehyde and salt .
- Odorless .
- Gamma radiated to assure sterility .
- Will not damage the probe .
- Does not contain air bubbles .
- pH = 7 .
#### Packaging and Labeling
Konix® Sterile Gel is sold in 20 mL (0.67 oz), single-use sachets. The sachets are composed of polyester (12 micron), aluminum foil (7 micron), and polyethylene (80 micron), and are terminally sterilized using gamma irradiation. The sachets are 60 mm wide and 130 mm long. The labeling information on the package complies with the FDA requirements. The shelf package has been examined and found have maintained integrity and sterility over a three year period.
#### Indications for Use [807.92(a)(6)
As stated on Label: Contact medium for ultrasonic and electrical transmission gel.
Konix® Sterile Gel is sterilized by gamma irradiation and intended for use in all diagnostic ultrasound procedures that currently use an ultrasound coupling gel or other fluid, alone or in combination with a transducer cover, where sterility and in vivo biocompatibility are required. It can be used on the skin where the risk for infections is especially high, especially with open tissue Doppler applications; and can be used for cystoscopic and vaginal Doppler and ultrasound examinations.
Konix® Serile Gel can be used on the skin or in open tissue where there is a risk for infections, such as in open tissue Doppler applications. It can be used during surgery; for cystoscopic and vaginal ultrasound and Doppler examinations; for cardiac surgery and ultrasound procedures; and as a lubricant in biopsy applications.
{2}------------------------------------------------
## Technological Characteristics [807.92(a)(6)]
Both the predicate device (Parker Laboratories' Sterile Aquasonic® 100 Ultrasonic Gel) and Konix® Sterile Gel have the same technological characteristics. They are both polymer-based gels that contain similar ingredients that allow their use in ultrasonic applications. Independent testing of Konix® Sterile Gel indicated that "the acoustic properties of this gel are very similar to those of other coupling gels commonly employed."
| PHYSICAL AND<br>CHEMICAL<br>PROPERTIES | Very high clarity |
|----------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------|
| | Hypoallergenic, non-cytotoxic, and non-sensitizing |
| | Sterile |
| | pH = 6.5 ± 0.75 |
| | Density(g/cm3)=0.983 |
| | Very clear screen image with high viscosity and vacuum process. No rapid<br>melting from high-viscosity gel. Viscosity: 100,000-200,000 cp |
| | Boiling Point> 200°F |
| | Water soluble high molecular weightpolymer |
### Substantial Equivalence [807.92(b)(1)]
Turkuaz Konix® Sterile Gel has been determined to be substantially equivalent to Parker Laboratories' Sterile Aquasonic® 100 Ultrasound Gel, a marketed device. The sterility, intended use, active ingredients and other components, and packaging, are substantially equivalent to the predicate device.
| FEATURES | TURKUAZ<br>KONIX® STERILE GEL | PARKER LABS STERILE<br>AQUASONIC® 100<br>ULTRASOUND GEL |
|------------------------------------------------------------------------|-------------------------------|---------------------------------------------------------|
| • Sterile formula | √ | √ |
| • Aqueous solution will<br>not stain clothing or<br>damage transducers | √ | √ |
| • Convenient<br>single- use foil | √ | √ |
| • Suitable for broad<br>range of ultrasound<br>frequencies | √ | √ |
| • Viscous ultrasound<br>transmission gel | √ | |
| • Hypoallergenic | √ | √ |
| • Bacteriostatic for<br>increased hygiene | √ | √ |
| • Non-sensitizing and<br>non-irritating for<br>patient comfort | √ | |
{3}------------------------------------------------
| • Formula<br>does<br>not | √ | | √ |
|-------------------------------------------------------------------|------------------|--|------------------|
| • Not a spermicide | √ | | √ |
| • Clear, Pale Yellow<br>Color | √ | | √ |
| • 20 mL/20 gm | √ | | √ |
| • Ingredients:<br>Polymer,<br>Humectants,<br>Preservatives, Water | √ | | √ |
| • pH Range | 6.5 - 7.5 | | 6.5 - 6.95 |
| • Density | 0.983 g/cm³ | | 1.03 g/cm3 |
| • Acoustic Impedance | 1.45 (10⁵gm/cm²) | | 1.60 (10⁵gm/cm²) |
### Production
Konix® Sterile Gel is produced in a closed-loop system so that contamination is eliminated. The carbomer and monopropylene glycol are added to water in a mixer. There is an in-process quality control that confirms the correct percentage of ingredients. The preservatives are then added, and the pH is adjusted. A final analysis is conducted on the mixture, and then the product is filled. The product is produced in a 100,000 class clean room with Hepa filters. The process includes a vacuum process so that bubbles cannot form. After production, the sterile gel is gamma irradiated according to accepted standards, to assure sterility. The product has a three year shelf-life.
## Ingredients
KONIX® STERILE GEL
| INGREDIENTS | COMMON CHEMICAL NAME | CAS NUMBER | QUANTITY<br>(w/v %) |
|--------------------------------------------|------------------------------------------------------------|-------------------------|---------------------|
| Carbomer | Acrylates/C10-30 Alkyl Acrylate<br>Crosspolymer | 9003-01-004 | 0.3-1.0 |
| Triethanolamin | Triethanolamin | 102-71-6 | 0.3-1.0 |
| MonoPropylene Glycol | MonoPropylene Glycol | 57-55-8 | 0.5-2.0 |
| 5-chloro-2-methyl-4-<br>isothiazolin-3-one | Methylchloroisothiazolinone (and)<br>Methylisothiazolinone | 26172-55-4<br>2682-20-4 | 0.05-0.15 |
| Deionized water | Deionized water | - | Q.S 100 |
{4}------------------------------------------------
Carbomer, triethanolamin, and monopropylene glycol constitute the ingredients that form the gel. These are common ingredients used for this purpose. Methylchloroisothiazolinone (5-chloro-2-methyl-4-isothiazolin-3-one) is a preservative with antibacterial and antifungal effects within the group of isothiazolinones. It is effective against gram-positive and gram-negative bacteria, yeast, and fungi. Methylisothiazolinone, is a powerful general biocide and preservative within the group of isothiazolinones, often used in personal care products.
### Release Specifications
| Item | Specification and Range |
|------------------------------------------------------------------------------------|-------------------------|
| pH | 6.50-7.50 |
| Density | 0.683-1.283 (g/cm³) |
| Carbomer | 0.3-1.0 (w/v %) |
| Triethanolamin | 0.3-1.0 (w/v %) |
| MonoPropyleneGlyco | 0.5-2.0 (w/v %) |
| 5-chloro-2-methyl-4-<br>isothiazolin-3-one & 2-<br>methyl-4-isothiazolin-3-<br>one | 0.05-0.15 (w/v %) |
| Odor | Odorless |
| Clarity | Clear |
| Microbes | Zero CFU/Gm (Sterile) |
### Performance Test
The results of the acoustic tests indicated that "no effect of attenuation or impedance mismatch with the gels could be observed in imaging of the test objects in numerous real time sweeps." The report stated that the acoustic impedance of 1.49 kg/m²s for the Konix® gel is close to the reported mean human dermis of 1.6 kg/m²s, and should minimize reflection loses and generation of reverberant echoes when gel layers of at least 1/4 wavelength are employed. The speed of sound of 1516 m/s is very close to the 1518 m/s reported for skin, and this should minimize refract errors for oblique incidence into skin after passage through finite thicknesses of gel and keep elevation focus for RTV lense material as designed. In conclusion, the researchers stated that the "acoustic properties of this gel are very similar to those of other coupling gels commonly employed.
{5}------------------------------------------------
## Sterility and Shelf-Life
Independent testing confirmed that Konix® Sterile Gel is free of microbes following sterilization radiation. No aerobic mesophilic bacteria were present in either tryptone soy broth or fluid thioglycollate medium after 14 days of storage at 30℃.
Storage stability testing at 22° and 40°C indicated that Konix® Sterile Gel is stable for three years at ambient temperatures when pH, density, and appearance were measured. Additionally, examination of packages over a three year period showed that there was no microbial growth, thus confirming long-term package integrity and sterility.
### Additional Tests
In vitro cytotoxicity, in vivo sensitization, irritation tests, and mouse systemic toxicity tests were conducted with the Konix® Sterile Gel according to standard protocols. All tests proved negative for cytotoxicity, sensitization, and systemic toxicity.
{6}------------------------------------------------
Image /page/6/Picture/0 description: The image shows the logo for the U.S. Department of Health & Human Services. The logo consists of a circular seal with the words "DEPARTMENT OF HEALTH & HUMAN SERVICES USA" around the perimeter. Inside the circle is an emblem of an eagle with three lines extending from its back, resembling wings or feathers. The eagle is facing to the right.
#### DEPARTMENT OF HEALTH & HUMAN SERVICES
Public Health Service
Food and Drug Administration 10903 New Hampshire Avenge Document Control Center - WO66-G609 Silver Spring, MD 20993-0002
June 18, 2014
Turkuaz Saglik Hizmetleri Medikal Temizlik Kimyasal Urunleri San. Ve Tic. Ltd. Sti. % Mr. Michael Scott President ST&T Consultants, Inc. 2237 Chestnut Street SAN FRANCISCO CA 94123
Re: K130581
Trade/Device Name: Konix® Sterile Gel Regulation Number: 21 CFR 892.1570 Regulation Name: Diagnostic ultrasonic transducer Regulatory Class: II Product Code: MUI Dated: May 13, 2014 Received: May 23, 2014
Dear Mr. Scott:
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 mislcading.
lf your device is classified (sec above) into cither 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.
Please be advised that FDA's issuance of a substantial equivalence determination does not mean i has be additised that i britis in that your device complies with other requirements of the Act or any Federal statutes and regulations administered by other Federal agencies. You must or any it ederal statures and regimments, including, but not limited to: registration and listing (21 CFR Part 807): labeling (21 CFR Part 801): medical device reporting (reporting of medical device-related 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 is form in the quality 5) Steins (Sections 531-542 of the Act); 21 CFR 1000-1050.
{7}------------------------------------------------
Page 2-Mr. Scott
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/Resourcesfor You/Industry/default.htm.
Sincerely yours,

for
Janine M. Morris Director Division of Radiological Health Office of In Vitro Diagnostics and Radiological Health Center for Devices and Radiological Health
Enclosure
{8}------------------------------------------------
# Indications for Use
510(k) Number (if known) K 130581
Device Name Konix Sterile Gel r
Indications for Use (Describe)
As stated on Label: Contact medium for ultrasonic and electrical transmission gel.
Konix® Sterile Gel is sterilized by gamma irradiation and intended for use in all diagnostic ultrasound procedures that currently use an ultrasound coupling gel or other fluid, alone or in combination with a transducer cover, where sterlility and in vivo biocompatibility are required. It can be used on the skin where the risk for infections is especially high, especially with oven tissue Doppler applications; and can be used for cystoscopic and ultrasound examinations.
Konix® Serile Gel can be used on the skin or in open tissue where there is a risk for infections, such as in open tissue Doppler applications. It can be used during surgery; for
cystoscopic and vaginal ultrasound and Doppler examinations; for cardiac surgery and ultrasound procedures; and as a lubricant in biopsy applications
Type of Use (Select one or both, as applicable)
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)
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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.
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Click "Show Chart" and segment by Regulation Number. Clicking a regulation takes you to the regulations tree.
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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.
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A lot of people predicated them for a reason. Clicking a node traces parents and children, and selections from search carry over pre-selected.
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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.