(193 days)
Not Found
No
The document describes image processing and segmentation but does not mention AI, ML, or related terms like neural networks or deep learning. The calculations are based on standard formulas and refractive indices.
No.
The device is a diagnostic tool that acquires ocular measurements and performs calculations to aid in IOL selection; it does not directly treat or alleviate a condition.
No
Explanation: While the device measures ocular parameters, its primary stated purpose is to aid in the selection of the appropriate intraocular lens (IOL) power and type for implantation. This is a measurement and calculation function for surgical planning, not a diagnostic one. It does not diagnose diseases or conditions.
No
The device description explicitly states that Argos is a "swept-source based biometer" and processes images from "OCT images (B-scans) and 3 CMOS camera images". It also mentions "Safety protocol is well integrated into the device in both hardware and software". This indicates the device includes significant hardware components for image acquisition and processing, not just software.
Based on the provided information, the ARGOS device is not an In Vitro Diagnostic (IVD).
Here's why:
- IVDs are used to examine specimens derived from the human body. The definition of an IVD involves testing samples like blood, urine, tissue, etc., outside of the body to provide information about a person's health.
- ARGOS is a non-invasive, non-contact device. It directly measures parameters of the eye in vivo (within the living body) using optical technology (SS-OCT and CMOS camera). It does not analyze biological specimens.
- The intended use is for acquiring ocular measurements and performing calculations for IOL power. This is a diagnostic and planning tool for surgical procedures, not a test performed on a biological sample.
Therefore, while ARGOS is a medical device used for diagnosis and treatment planning, it does not fit the definition of an In Vitro Diagnostic device.
N/A
Intended Use / Indications for Use
ARGOS is a non-invasive, non-contact biometer based on swept-source optical coherence tomography (SS-OCT). The device is intended to acquire ocular measurements as well as perform calculations to determine the appropriate intraocular lens (IOL) power and type for implantation during intraccular lens placement. ARGOS measures the following 9 parameters: Axial Length, Corneal Thickness, Anterior Chamber Depth, Lens Thickness, K-values (Radii of flattest and steepest meridians), Astigmatism, White (corneal diameter) and Pupil Size. It is intended for use by ophthalmologists, physicians, and other eye-care professionals and may only be used under the supervision of a physician."
Product codes (comma separated list FDA assigned to the subject device)
MXK
Device Description
Argos is a swept-source based biometer that provides the biometry and keratometry of the eye prior to cataract surgery and aids in the selection of the appropriate IOL.
Argos processes 3 OCT images (B-scans) and 3 CMOS camera images per measurement in seconds - reducing procedure time and minimizing patient discomfort. From the OCT images the biometry parameters are evaluated by segmenting the cornea, iris, lens, and retina. The operator can edit the biometry parameters by manual adjustment: Axial length, Corneal thickness, Anterior chamber depth (or aqueous depth), Lens thickness, White-to-white (corneal diameter), Pupil size. The keratometry values: K-values (flattest and steepest meridians), Astigmatism (angle of flattest meridian), are evaluated from the CMOS camera image, in combination with the OCT information.
All distance/thickness parameters (Axial length, Corneal thickness, Anterior chamber depth, Lens thickness, White, Pupil size) are simultaneously measured from 2dimensional OCT images.
All the boundaries of ocular segments are detected and distances and thicknesses are calculated by taking into account the refractive indices of each medium.
Axial length is the distance from the corneal apex to the fovea or, more specifically, to the ILM (Internal Limiting Membrane). The calculation is performed as the sum of the thicknesses (after refraction correction) of the cornea, aqueous humor, lens and vitreous.
Corneal thickness is the distance between the anterior and the posterior apexes of the cornea divided by the cornea refractive index (1.375).
Aqueous depth is evaluated as the distance between the posterior surface of the cornea and the anterior surface of the lens divided by the refractive index (1.336).
Anterior chamber depth is the sum of corneal and aqueous humor distances.
Lens thickness is the distance between the anterior and the posterior surfaces of the lens divided by its refractive index (1.410).
Pupil size is the lateral distance between the two inner boundaries of the iris region.
White-to-white (Corneal diameter) is the lateral distance between the inner boundaries of the cornea-sclera interface.
K-values (Radii of flattest and steepest meridians) and Astigmatism are evaluated by the size and distance of the reflected images of the infrared LED ring projected onto the cornea.
Safety protocol is well integrated into the device in both hardware and software to ensure the safety of both the patient and the operator.
The control program on the computer runs on Windows. The operation panel on the display attached to the PC provides all the functionalities.
IOL calculation uses widely recognized formulas; Hoffer Q, Haigis, Holladay1, SRK/T, etc.
Mentions image processing
Not Found
Mentions AI, DNN, or ML
Not Found
Input Imaging Modality
swept-source optical coherence tomography (SS-OCT), CMOS camera images
Anatomical Site
ocular / eye
Indicated Patient Age Range
Not Found
Intended User / Care Setting
ophthalmologists, physicians, and other eye-care professionals and may only be used under the supervision of a physician.
Description of the training set, sample size, data source, and annotation protocol
Not Found
Description of the test set, sample size, data source, and annotation protocol
Not Found
Summary of Performance Studies (study type, sample size, AUC, MRMC, standalone performance, key results)
Bench Test
Performance of the ARGOS was evaluated by bench tests based on the relevant standards (ISO15004-1, 2, IEC 60825, ISO 10343) as well as side-by-side comparison tests at the clinic with the predicated device.
Both ISO 15004-1 and ISO 15004-2, and IEC60825 tests prove the fundamental requirements for ophthalmic instruments and optical radiation safety of ARGOS are equivalent to predicate device. ISO 10343 tests results provided the required accuracy performance for ophthalmometer which measures corneal radii of curvature and angle of meridian with a certain cylinder (toroidal surface).
Hardware specifications were validated for axial/lateral distance measurement accuracy and range, signal-to-noise ratio, and depth attenuation, to prove that ARGOS meets the hardware performance requirements.
Clinical Tests
A prospective clinical study was conducted at a single U.S, clinical site for assessing the agreement of Argos to predicate device Lenstar LS900. A precision study on healthy eyes was also conducted to calculate the repeatability and reproducibility of Argos. Finally, a validation study was conducted to evaluate the agreement for the Enhanced Retinal Visualization of Argos with respect to the Lenstar LS900.
Agreement Study
Sample Size: 100-115 eyes measured depending on the parameter.
The study compared Mean, Standard Deviation (SD), Spearman rank correlation coefficient, Bland-Altman means, SDs, Limits of Agreement (LoA), and Deming regression analysis intercepts, slopes, and 95% CI between ARGOS and the Lenstar LS900 for various biometric and keratometric parameters.
Key Results:
- Axial Length (AL): Mean difference 0.00mm, LoA [-0.10, 0.09]mm, Spearman 1.00.
- Corneal Thickness (CCT): Mean difference 0.00mm, LoA [-0.02, 0.02]mm, Spearman 0.97.
- Aqueous Depth (AD): Mean difference 0.05mm, LoA [-0.27, 0.37]mm, Spearman 0.89.
- Anterior Chamber Depth (ACD): Mean difference 0.05mm, LoA [-0.28, 0.37]mm, Spearman 0.89.
- Lens Thickness (LT): Mean difference -0.18mm, LoA [-0.61, 0.24]mm, Spearman 0.87.
- Pupil Size (PS): Mean difference -0.26mm, LoA [-1.16, 0.64]mm, Spearman 0.88.
- Corneal Diameter (CD): Mean difference -0.28mm, LoA [-1.62, 1.06]mm, Spearman 0.48.
- Flattest radius of curvature (R1): Mean difference -0.01mm, LoA [-0.15, 0.13]mm, Spearman 0.97.
- Steepest radius of curvature (R2): Mean difference 0.00mm, LoA [-0.14, 0.14]mm, Spearman 0.96.
- Average Radius of curvature (Rav): Mean difference -0.01mm, LoA [-0.12, 0.11]mm, Spearman 0.97.
- Astigmatism (Cyl.1D): Mean difference 4.36deg, LoA [-14.67, 23.39]deg, Spearman 0.97.
Precision Study
Repeatability and Reproducibility study performed on 43 healthy eyes per ISO 5725.
Key results included overall mean, SD, and CV for repeatability and reproducibility across the measured parameters. For AL, repeatability SD was 0.01mm (CV 0.02%), and reproducibility SD was 0.02mm (CV 0.09%).
Enhanced Retinal Visualization (ERV) mode Validation Study
Sample Size: 45 cataractous eyes (23 right eyes).
Study Type: Comparison with Lenstar for AL measurement.
Key results: For the comparison between Lenstar-Argos, there was a difference of 0.03 ± 0.04 mm and the LoA were from -0.06 mm to 0.12 mm. The Spearman rank correlation coefficient was 1.00 for all 3 comparisons. Statistically insignificant differences were found when performing a pairwise t-test with a confidence interval of 95%. The p-values for the comparison Lenstar-ERV was below 0.05. In terms of a Bland-Altman plot, the mean difference (MD) is -0.01, while the limits of agreement (LoA) are placed at -0.07 mm and 0.05 mm. The Deming regression analysis shows an intercept of -0.70 with 95% CI of [-0.93. -0.46] and a slope of 1.03 with 95% CI of [1.02, 1.04].
Additionally, a repeatability study for ERV mode in AL (N=43 healthy eyes) showed overall mean 25.20mm, repeatability 0.01mm, and CV 0.06%.
Conclusion: ARGOS is substantially equivalent to predicate devices for measuring 9 biometry and keratometry parameters and for IOL power calculation formulas. Optical power of the light beam entering into patient's eye is the same or even lower than level of predicate devices.
Key Metrics (Sensitivity, Specificity, PPV, NPV, etc.)
See "Summary of Performance Studies" for detailed metrics (Mean, SD, Spearman correlation, LoA for agreement, Repeatability and Reproducibility SD and CV for precision).
Predicate Device(s): If the device was cleared using the 510(k) pathway, identify the Predicate Device(s) K/DEN number used to claim substantial equivalence and list them here in a comma separated list exactly as they appear in the text. List the primary predicate first in the list.
Reference Device(s): Identify the Reference Device(s) K/DEN number and list them here in a comma separated list exactly as they appear in the text.
Not Found
Predetermined Change Control Plan (PCCP) - All Relevant Information for the subject device only (e.g. presence / absence, what scope was granted / cleared under the PCCP, any restrictions, etc).
Not Found
§ 886.1850 AC-powered slitlamp biomicroscope.
(a)
Identification. An AC-powered slitlamp biomicroscope is an AC-powered device that is a microscope intended for use in eye examination that projects into a patient's eye through a control diaphragm a thin, intense beam of light.(b)
Classification. Class II (special controls). The device, when it is intended only for the visual examination of the anterior segment of the eye, is classified as Group 1 per FDA-recognized consensus standard ANSI Z80.36, does not provide any quantitative output, and is not intended for screening or automated diagnostic indications, is exempt from the premarket notification procedures in subpart E of part 807 of this chapter subject to the limitations in § 886.9.
0
Image /page/0/Picture/1 description: The image is a black and white logo for the U.S. Department of Health & Human Services. The logo features a stylized image of three human profiles facing right, layered on top of each other. The profiles are connected to a design that resembles a bird in flight. The text "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" is arranged in a circular pattern around the image.
Food and Drug Administration 10903 New Hampshire Avenue Document Control Center - WO66-G609 Silver Spring, MD 20993-0002
October 2, 2015
Santec Corporation c/o Changho Chong, Ph.D. Sr. Vice President 5150 El Camino Real, D23 Los Altos, CA 94022
Re: K150754 Trade/Device Name: ARGOS Regulation Number: 21 CFR 886.1850 Regulation Name: AC-Powered Slitlamp Bio-Microscope Regulatory Class: Class II Product Code: MXK Dated: September 2, 2015 Received: September 3, 2015
Dear Dr. Chong:
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 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 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" (21CFR 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.
Kesia Y. Alexander -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) K150754
Device Name ARGOS
Indications for Use (Describe)
ARGOS is a non-invasive, non-contact biometer based on swept-source optical coherence tomography (SS-OCT). The device is intended to acquire ocular measurements as well as perform calculations to determine the appropriate intraocular lens (IOL) power and type for implantation during intraccular lens placement. ARGOS measures the following 9 parameters: Axial Length, Corneal Thickness, Anterior Chamber Depth, Lens Thickness, K-values (Radii of flattest and steepest meridians), Astigmatism, White (corneal diameter) and Pupil Size. It is intended for use by ophthalmologists, physicians, and other eye-care professionals and may only be used under the supervision of a physician."
X Prescription Use (Part 21 CFR 801 Subpart D)
Over-The-Counter Use (21 CFR 801 Subpart C)
CONTINUE ON A SEPARATE PAGE IF NEEDED.
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
| SANTEC CORPORATION |
|---|
| -------------------- |
| Section : 13 | Rev. 5 | Oct.2, 2015 | Page 1/9 |
|---|---|---|---|
| -------------- | -------- | ------------- | ---------- |
| Title: 510(k) Summary |
|---|
| ----------------------- |
Title: 510(k) Summary
SUMMARY OF 510(K) SAFETY AND EFFECTIVENESS INFORMATION
The information contained in this premarket notification 510(k) summary is submitted as required by 21 CFR 807.92:
1. Type of Submission
510k Traditional submission for New Devices
2. Applicant Company:
SANTEC CORPORATION, 5823 Ohkusa-Nenjyozaka, Komaki, Aichi 485-0802, JAPAN Phone: 81 (0568) 79 3535 www.santec.com
3. Applicant (Contact Person) Name:
Changho Chong
-
- Date Summary Prepared: Mar. 5, 2015
5. Device Trade / Proprietary Name:
ARGOS
-
- Common Name: Optical Biometer
-
- Classification Name: Device, Analysis, Anterior Segment
8. Class:
II
-
- Classification Panel: Ophthalmic Device Panel
-
- Product Code: MXK - Device, Analysis, Anterior Segment
-
- Regulation Number: 21CFR 886.1850
4
| SANTEC CORPORATION | |||||
|---|---|---|---|---|---|
| Section : 13 | Rev. 5 | Oct.2, 2015 | Page 2/9 | ||
| Title: 510(k) Summary |
12. Device Description:
Argos is a swept-source based biometer that provides the biometry and keratometry of the eye prior to cataract surgery and aids in the selection of the appropriate IOL.
Argos processes 3 OCT images (B-scans) and 3 CMOS camera images per measurement in seconds - reducing procedure time and minimizing patient discomfort. From the OCT images the biometry parameters are evaluated by segmenting the cornea, iris, lens, and retina. The operator can edit the biometry parameters by manual adjustment: Axial length, Corneal thickness, Anterior chamber depth (or aqueous depth), Lens thickness, White-towhite (corneal diameter), Pupil size. The keratometry values: K-values (flattest and steepest meridians), Astigmatism (angle of flattest meridian), are evaluated from the CMOS camera image, in combination with the OCT information.
All distance/thickness parameters (Axial length, Corneal thickness, Anterior chamber depth, Lens thickness, White, Pupil size) are simultaneously measured from 2dimensional OCT images.
All the boundaries of ocular segments are detected and distances and thicknesses are calculated by taking into account the refractive indices of each medium.
Axial length is the distance from the corneal apex to the fovea or, more specifically, to the ILM (Internal Limiting Membrane). The calculation is performed as the sum of the thicknesses (after refraction correction) of the cornea, aqueous humor, lens and vitreous.
Corneal thickness is the distance between the anterior and the posterior apexes of the cornea divided by the cornea refractive index (1.375).
Aqueous depth is evaluated as the distance between the posterior surface of the cornea and the anterior surface of the lens divided by the refractive index (1.336).
Anterior chamber depth is the sum of corneal and aqueous humor distances.
Lens thickness is the distance between the anterior and the posterior surfaces of the lens divided by its refractive index (1.410).
Pupil size is the lateral distance between the two inner boundaries of the iris region.
White-to-white (Corneal diameter) is the lateral distance between the inner boundaries of the cornea-sclera interface.
K-values (Radii of flattest and steepest meridians) and Astigmatism are evaluated by the size and distance of the reflected images of the infrared LED ring projected onto the cornea.
Safety protocol is well integrated into the device in both hardware and software to ensure the safety of both the patient and the operator.
The control program on the computer runs on Windows. The operation panel on the display attached to the PC provides all the functionalities.
IOL calculation uses widely recognized formulas; Hoffer Q, Haigis, Holladay1, SRK/T, etc.
5
| SANTEC CORPORATION | |||
|---|---|---|---|
| Section : 13 | Rev. 5 | Oct.2, 2015 | Page 3/9 |
| Title: 510(k) Summary |
Device Design:
ARGOS construction is divided as six sub-assemblies, which are:
-
- Interferometer/Camera Assembly
-
- Illumination Assembly
-
- Light source(Biometry) Assembly
-
- Electronics Assembly
-
- Chinrest Assembly
-
- Joystick Assembly
13. Indication for Use:
ARGOS is a non-invasive, non-contact biometer based on swept-source optical coherence tomography (SS-OCT). The device is intended to acquire ocular measurements as well as perform calculations to determine the appropriate intraocular lens (IOL) power and type for implantation during intraocular lens placement. ARGOS measures the following 9 parameters: Axial Length, Corneal Thickness, Anterior Chamber Depth, Lens Thickness, Kvalues (Radii of flattest and steepest meridians), Astigmatism, White-to-white (corneal diameter) and Pupil Size. It is intended for use by ophthalmologists, physicians, and other eye-care professionals and may only be used under the supervision of a physician.
14. Identification of a Legally Marketed Predicate Device:
The following shows the substantially equivalent predicate devices to our submitted new devices
- I. Company: Haag-Streit AG Model: Lenstar, LS900 510(K) No.: K082891 Classification: MXK - Device, Analysis, Anterior Segment Establish Registration number: 1000176188
15. Guidance on the Recognition and Use of Consensus Standards:
ARGOS complies with the requirements of listed FDA Recognized Consensus Standards.
| Compliant standard | Description | Classification |
|---|---|---|
| IEC 60601-1 | Electrical safety | Class 1 Type B |
| IEC 60601-1-2 | Electrical safety | Refer to Appendix 5 |
| IEC 60529 | Housing protection | IP20 |
| ISO 15004-2 | Light hazard protection for ophthalmic instruments | Group 2 |
| IEC 62471 | LED light hazard | Exempt group |
| IEC 60825-1 | Laser product safety | Laser Class 1 |
| ISO 10343 | Ophthalmometer | |
| FDA | Class 2 |
6
| SANTEC CORPORATION | |||||
|---|---|---|---|---|---|
| Section : 13 | Rev. 5 | Oct.2, 2015 | Page 4/9 | ||
| Title: 510(k) Summary |
16. Substantial equivalence to the predicate device
Comparisons of technological characteristics of the ARGOS with Predicate Devices were performed and found to be substantially equivalent.
Table of comparison between the ARGOS and the predicate device
| New Device | Predicate Device | |
|---|---|---|
| Manufacturer | santec corporation | Haag-Streit |
| Model | ARGOS | Lenstar LS900 |
| 510(k) number | ARGOS | K082891 |
| Class | II | II |
| Classification panel | Ophthalmic device panel | Ophthalmic device panel |
| Product code | MXK | MXK |
| Classification | ||
| number | Device, Analysis, Anterior Segment | Device, Analysis, Anterior Segment |
| Type | Optical biometer | Optical biometer |
| Intended Use | ARGOS is a non-invasive, non-contact | |
| biometer based on swept-source optical | ||
| coherence tomography (SS-OCT). The | ||
| intended use is to measure the biometry | ||
| and keratometry of the eye to calculate | ||
| intra-ocular lens (IOL) power using well- | ||
| established formulas and to determine | ||
| the appropriate type of IOL prior to | ||
| cataract surgery (i.e. implantation of IOL | ||
| after removal of crystalline lens with | ||
| cataract). | The LENSTAR LS900 is a non- | |
| invasive, non-contact OLCR (Optical | ||
| Low-Coherence Reflectometry) | ||
| Biometer used for obtaining ocular | ||
| measurements and performing | ||
| calculations to assist in the | ||
| determination of the appropriate | ||
| power and type of IOL (intraocular | ||
| lens) for implantation after removal | ||
| of the natural crystalline lens | ||
| following cataract removal. | ||
| Measured | ||
| parameters | Axial Length, Corneal Thickness, | |
| Anterior Chamber Depth, Lens | ||
| Thickness, K-values (Radii of flattest and | ||
| steepest meridians), Astigmatism , | ||
| White-to-white (corneal diameter), and | ||
| Pupil Size. | Axial Length, Corneal Thickness, | |
| Anterior Chamber Depth, Lens | ||
| Thickness, K-values (Radii of flattest | ||
| and steepest meridians), | ||
| Astigmatism, White-to-white | ||
| (corneal diameter), and Pupil Size. | ||
| In-vivo repeatability | Axial length: range 15-30mm, SD | |
| 0.01mm | Axial length: range 14-32mm, SD | |
| 0.035mm | ||
| Corneal thickness: range 300-800um, SD | ||
| 10 μm | Corneal thickness: range 300- | |
| 800um, SD 2.3um | ||
| Anterior Chamber Depth: range 1.5- | ||
| 5.5mm SD 0.01mm | Anterior Chamber Depth: range 1.5- | |
| 5.5mm SD 0.04mm | ||
| Lens Thickness: range 0.5-6.5mm SD | ||
| 0.02mm | Lens Thickness: range 0.5-6.5mm | |
| SD 0.08mm | ||
| Keratometry: range 5-10.5mm SD | ||
| 0.02mm | Keratometry: range 5-10.5mm SD | |
| 0.03mm | ||
| Astigmatism: range 0-180deg, SD 4deg | ||
| (Cylinder** Accuracy of this finction has not been well confirmed due to the different measurement principle. Argos uses the definition proposed by Pavin CJ, Harasiewicz K, Foster FS. Utrasound biomicroscopy of anterior sin normal and glaucomatous eyes. Am J Ophthaimol.1992; 113:381–389. |
9
| SANTEC CORPORATION | ||||
|---|---|---|---|---|
| Section : 13 | Rev. 5 | Oct.2, 2015 | Page 7/9 | |
| Title: 510(k) Summary |
Table 17.2.1: Summary of the comparison performed for the 2 systems: Lenstar and Argos with and without the exclusion of outliers. AV the average of the results, SD the standard deviation, the Spearman correlation coefficient, the average of the differences, the standard deviation of the difference, limits of agreement, and the Deming regression analysis intercepts, slopes, and 95% confidence interval.
| All Data | ||||||||
|---|---|---|---|---|---|---|---|---|
| Bland-Altman | Deming | |||||||
| Spear | Mean (SD) | Intercept [95% Ci] | ||||||
| Parameter Units | Biometer | N | Mean (SD) | man | [LoA] | Slope [95% CI] | ||
| AL | Lenstar | 23.43 (1.01) (1.00) | 1.00 | 0.00(0.05) | -0.68 [-0.93,-0.43] | |||
| [mm] | Argos | 100 | 23.44 (0.98) (0.00) | [-0.10,0.09] | 1.03 [1.02,1.04] | |||
| ССТ | Lenstar | 0.53 (0.04) (0.98) | 0.97 | 0.00(0.01) | -0.02 [-0.05,0.01] | |||
| [mm] | Argos | 115 | 0.53 (0.03) (0.00) | [-0.02,0.02] | 1.04 [0.99,1.10] | |||
| Lenstar | 2.66 (0.41) (0.95) | 0.05(0.16) | -0.10 [-0.29,0.09] | |||||
| AD | [mm] | Argos | 115 | 2.63 (0.39) (0.00) | 0.89 | [-0.27,0.37] | 1.06 [0.98,1.13] | |
| ometr | Lenstar | 3.19 (0.42) (0.95) | 0.05(0.17) | -0.17 [-0.39,0.06] | ||||
| ACD | [mm] | Argos | 115 | 3.16 (0.39) (0.00) | 0.89 | [-0.28,0.37] | 1.07 [1.00,1.14] | |
| LT | Lenstar | 111 | 4.46 (0.45) (0.89) | 0.87 | -0.18(0.22) | -0.58 [-1.10,-0.05] | ||
| [mm] | Argos | 4.62 (0.41) (0.00) | [-0.61,0.24] | 1.09 [0.97,1.20] | ||||
| ારડ | ||||||||
| [mm] | Lenstar | 4.10 (0.77) (0.89) | 0.88 | -0.26(0.46) | 0.55 [-0.02,1.11] | |||
| Argos | 108 | 4.38 (0.91) (0.00) | [-1.16,0.64] | 0.81 [0.68,0.95] | ||||
| CD | ||||||||
| [mm] | Lenstar | 11.86 (0.49) (0.50) | 0.48 | -0.28(0.69) | 4.91 [1.79,8.04] | |||
| Argos | 115 | 12.11 (0.68) (0.00) | [-1.62,1.06] | 0.57 [0.31,0.83] | ||||
| R1 | [mm] | Lenstar | 115 | 7.79 (0.30) (0.98) | 0.97 | -0.01(0.07) | -0.09 [-0.45,0.26] | |
| Argos | 7.80 (0.29) (0.00) | [-0.15,0.13] | 1.01 [0.96,1.06] | |||||
| R2 | ||||||||
| [mm] | Lenstar | 7.61 (0.27) (0.98) | 0.00(0.07) | 0.22 [-0.05,0.48] | ||||
| Argos | 115 | 0.96 | ||||||
| 7.61 (0.28) (0.00) | [-0.14,0.14] | 0.97 [0.94,1.01] | ||||||
| Rav | ||||||||
| [mm] | Lenstar | 115 | 7.70 (0.28) (0.99) | 0.97 | -0.01(0.06) | 0.06 [-0.17,0.30] | ||
| ratomet | Argos | 7.70 (0.28) (0.00) | [-0.12,0.11] | 0.99 [0.96,1.02] | ||||
| AST | Lenstar | 77 | 94.07 (45.94) (0.91) | 0.56 | 8.29(48.04) | -1.27 [-24.26,21.71 | ||
| (Cyl. [°]Argos87.89 (46.85) (0.00)-85.87,102.451.11 [0.90,1.33] | [°] | Argos | 87.89 (46.85) (0.00) | -85.87,102.45 | 1.11 [0.90,1.33] | |||
| AST | Lenstar | 36 | 81.44 (46.96) (0.97) | 4.36(9.71) | 0.07 [-6.02,6.15] | |||
| (Cyl.>1D) | [0] | Argos | 78.40 (46.34) (0.00) | 0.97 | [-14.67,23.39] | 1.05 [0.96,1.15] |
17.2.2 Precision Study
Repeatability study was performed for every healthy eye (43) analyzed for same machine, same operator and 3 acquisitions after realignment. The measurements were analyzed in terms of precision in a fully nested variance analysis as per ISO 5725. The overall mean, repeatability are presented in Table 17.2.2, together with the CV. The Reproducibility study was performed in a fully-nested (5725 ISO standard) variance analysis using 3 measurements for every operator and machine. A total number of 43 eyes were analyzed. The overall mean, reproducibility is presented in Table 17.2.2 with the CV.
10
| SANTEC CORPORATION | ||||
|---|---|---|---|---|
| Section : 13 | Rev. 5 | Oct.2, 2015 | Page 8/9 | |
| Title: 510(k) Summary |
| Repeatability | Reproducibility | ||||
|---|---|---|---|---|---|
| Overall | |||||
| mean | |||||
| (mm) | SD(mm) | CV(%) | SD(mm) | CV(%) | |
| AL | 25.20 | 0.01 | 0.02 | 0.02 | 0.09 |
| CCT | 0.53 | 0.00 | 0.89 | 0.01 | 1.19 |
| AD | 2.93 | 0.01 | 0.37 | 0.03 | 0.90 |
| ACD | 3.46 | 0.01 | 0.27 | 0.03 | 0.77 |
| LT | 4.16 | 0.02 | 0.38 | 0.06 | 1.45 |
| PS | 4.95 | 0.09 | 1.83 | 1.01 | 20.31 |
| CD | 13.07 | 0.06 | 0.46 | 0.10 | 0.77 |
| R1 | 8.00 | 0.01 | 0.14 | 0.03 | 0.34 |
| R2 | 7.77 | 0.02 | 0.21 | 0.04 | 0.48 |
| Rav | 7.88 | 0.01 | 0.13 | 0.03 | 0.35 |
| AST* | 78.54 | 4.39 | 5.59 | 11.13 | 14.17 |
Table 17.2.2: Summary of the repeatability value for 3 measurements performed by the same machine and operator. Summary of the reproducibility value for 3 measurements per 3 machines and 3 operators. *AST - All the reproducibility parameters are in mm, except the Astigmatism that it is in degrees.
17.2.3 Enhanced Retinal Visualization (ERV) mode Validation Study
A comparison was performed with ERV and Lenstar for cataractous 45 eyes (23 right eyes). Table 17,2,3 summarizes the comparison made between both biometers, Argos ERV mode, and Lenstar. For the comparison between Lenstar-Argos there was a difference of 0.03 ± 0.04 mm and the LoA were from -0.06 mm to 0.12 mm. The Spearman rank correlation coefficient was 1.00 for all 3 comparisons. Statistically insignificant differences were found when performing a pairwise t-test with a confidence interval of 95%. The p-values for the comparison Lenstar-ERV was below 0.05. In terms of a Bland-Altman plot, the mean difference (MD) is -0.01, while the limits of agreement (LoA) are placed at -0.07 mm and 0.05 mm. The Deming regression analysis shows an intercept of -0.70 with 95% CI of [-0.93. -0.46] and a slope of 1.03 with 95% CI of [1.02, 1.04].
Table 17.2.3: Summary of the comparison performed for the systems: Lenstar, and ERV. AV the average of the results, SD the standard deviation, the Spearman correlation coefficient, the average of the differences, the standard deviation of the difference and the Limits of agreement.
| Devices | AV
[mm] | SD [mm] | Spearman
Rank
Correlation
Coefficient
(rs) | AV Difference
[mm] | SD of AV
Difference [mm] | Limits of
Agreement [mm] |
|---------|------------|---------|--------------------------------------------------------|-----------------------|-----------------------------|-----------------------------|
| Lenstar | 23.46 | 1.08 | 1.00 | 0.03 | 0.04 | -0.06 , 0.12 |
To characterize the ERV technique in Axial Length (AL), a repeatability study was performed by means of 3 repeated acquisitions in 43 consecutive healthy eyes. The Repeatability and Coefficient of Variation were calculated from 3 consecutives measurements with realignment by one operator and one machine and analyzed as a fully-
11
| SANTEC CORPORATION | |||||
|---|---|---|---|---|---|
| Section : 13 | Rev. 5 | Oct.2, 2015 | Page 9/9 | ||
| Title: 510(k) Summary |
nested ANOVA study as described in ISO 5725. The overall mean was 25.20mm with a Repeatability was 0.01 mm and a coefficient of variation (CV) was 0.06 % for ERV (Table 17.2.4).
Table 17.2.4: Summary of the performed repeatability for ERV mode of ARGOS. It presents the Standard Deviation and Coefficient of Variation.
| Repeatability | |||
|---|---|---|---|
| Overall mean | |||
| (mm) | SD (mm) | CV(%) | |
| AL | 25.20 | 0.01 | 0.06 |
17.3 Conclusion drawn from Performance Testing
The summary of bench tests and side-by-side performance comparison with predicate devices showed that the ARGOS is substantially equivalent to the predicate devices for measuring 9 biometry and keratometry parameters as well as IOL power calculation formulas. Optical power of the light beam entering into patient's eye is the same or even lower than level of predicate devices. The detail hazard analysis was certified by a recognized expert in the field of optical radiation hazards and safety analysis of medical instruments, Dr. David Sliney (Reference: 042) Appendix 8 ISO 15004-2 Test Report, 043 Appendix 9 Optical Radiation Safety Evaluation letter). Information was submitted to demonstrate that there are no significant differences in technological characteristics between the ARGOS and the predicate devices.
18. Conclusion:
In accordance with the Federal Food. Drug and Cosmetic Act, 21 CFR Part 807 and based on the information provided in this Premarket Notification, santec corporation concludes that the ARGOS is safe and effective, and substantially equivalent to predicate devices as described herein.
END OF SUMMARY