(88 days)
This device will be used in the same manner as all OCT scanner devices are used for two dimensional cross-sectional imaging of the posterior segment of the eye. It incorporates the original intended uses of our earlier claimed substantially equivalent products. It is used primarily for diagnosing and monitoring retinal diseases and disorders that manifest themselves in the posterior pole of the eye. Clinical studies with the OCT have demonstrated its effectiveness in detecting and quantifying the extent of macular edema, macular holes, retinal detachments and central serious chorioretinopathy.
In general OCT Scanners permit the user to obtain and analyze crosssectional tomograms of ocular tissue in a non-contact and non-invasive manner. The Humphrey Optical Coherence Tomography Scanner measures optical reflectivity to obtain cross sectional tomograms of the eye.
The Humphrey OCT employs the principle of low coherence interferometry based upon the Michelson interferometer. In a Michelson interferometer, the light from a source is split into a sample path and a reference path containing a mirror. Light reflected back from the sample path and the reference path will create an interference pattern on a detector if the optical path lengths between the reference and sample are identical. Adjusting the length of the reference path will allow a semi-transparent sample, such as the retina, to be cross-sectionally scanned.
The Super-Luminescent Diode (SLD) used in the Humphrey OCT Scanner permits a short coherence length in air. Accounting for the index of refraction of the eye, this translates to an even shorter coherence length within the retina. The SLD emits near infrared light which is scattered by the various interfaces and structures of the retinal tissue. As the reference arm is moved, a depth profile of the retina is produced which is similar to ultrasound A-scan. The profile plots variations in optical reflectivity between the different layers of the retina. Two mirrors mounted to galvanometers deflect the SLD beam within the eye. Scanning the retina in this manner produces cross-sectional images similar to ultrasound B-scan but of much higher resolution. The tomographic images of the retina produced by the OCT scanner provide an important tool in the diagnosis of retinal disorders and diseases that manifest themselves in the posterior pole of the eye.
The provided FDA 510(k) summary is for the Humphrey Optical Coherence Tomography (OCT) Scanner. This document is a premarket notification for a medical device and, as such, focuses on demonstrating substantial equivalence to a predicate device rather than providing a detailed clinical study report with acceptance criteria and performance metrics typically found in a PMA (Premarket Approval) or later clinical trial documentation.
Therefore, much of the requested information regarding specific acceptance criteria, study details, and performance metrics is not explicitly available in this summary. The document states that the device is "substantially equivalent" to a legally marketed predicate device.
Here's what can be extracted and noted from the provided text:
Acceptance Criteria and Device Performance
| Criteria Category | Acceptance Criteria (Not Explicitly Stated) | Reported Device Performance (From Summary) |
|---|---|---|
| Intended Use Equivalence | To perform two-dimensional cross-sectional imaging of the posterior segment of the eye, for diagnosing and monitoring retinal diseases and disorders that manifest in the posterior pole. | "This device will be used in the same manner as all OCT scanner devices are used for two dimensional cross-sectional imaging of the posterior segment of the eye." |
| "It is used primarily for diagnosing and monitoring retinal diseases and disorders that manifest themselves in the posterior pole of the eye." | ||
| Effectiveness in Diagnosis | To effectively detect and quantify specific retinal conditions. | "Clinical studies with the OCT have demonstrated its effectiveness in detecting and quantifying the extent of macular edema, macular holes, retinal detachments and central serious chorioretinopathy." (No specific metrics or thresholds are provided). |
| Technology Equivalence | To operate based on similar principles and provide comparable imaging quality/resolution to existing OCT devices. | "The Humphrey OCT employs the principle of low coherence interferometry based upon the Michelson interferometer." |
| "Scanning the retina in this manner produces cross-sectional images similar to ultrasound B-scan but of much higher resolution." | ||
| "The tomographic images of the retina produced by the OCT scanner provide an important tool in the diagnosis of retinal disorders..." | ||
| Design/Functionality Improvements | To offer improved features while maintaining or improving performance (e.g., wider field of view, longer working distance). | "The new OCT has a redesigned delivery system. This improvement permits a greater field of view, a longer working distance, the introduction of the Landmark system and a new internal fixation system." |
| Substantial Equivalence | To be substantially equivalent to a predicate OCT device. | "The modified OCT is substantially equivalent to the predicate device." |
| "We are claiming substantial equivalence to the OCT predicate device, which already has market clearance." |
Study Details (Based on the 510(k) Summary)
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Sample size used for the test set and the data provenance:
- Not explicitly stated. The summary mentions "Clinical studies were mentioned above" but does not provide details on the sample size for a test set. This document is a 510(k) for substantial equivalence, not a detailed clinical trial report.
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Number of experts used to establish the ground truth for the test set and the qualifications of those experts:
- Not explicitly stated. The summary refers to "Clinical studies" but gives no details on expert involvement or qualifications.
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Adjudication method (e.g., 2+1, 3+1, none) for the test set:
- Not explicitly stated.
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If a multi-reader multi-case (MRMC) comparative effectiveness study was done, If so, what was the effect size of how much human readers improve with AI vs without AI assistance:
- Not applicable for this device and document. This device is an imaging scanner, not an AI-assisted diagnostic tool in the sense of software interpreting images for a reader. The document describes the scanner's ability to produce images and its effectiveness in detecting conditions.
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If a standalone (i.e., algorithm only without human-in-the-loop performance) was done:
- Not applicable/Not explicitly stated. The device is an imaging scanner; its "performance" is in producing images. The mention of its "effectiveness in detecting and quantifying" conditions implies its use by a clinician. There's no separate algorithm that performs diagnosis independently described.
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The type of ground truth used (expert consensus, pathology, outcomes data, etc.):
- Not explicitly stated. The summary only mentions "Clinical studies" demonstrated effectiveness in detecting and quantifying various retinal conditions. The nature of the ground truth used in these studies (e.g., comparison to a different gold standard imaging modality, surgical findings, subsequent clinical course, expert diagnosis) is not detailed.
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The sample size for the training set:
- Not applicable/Not explicitly stated. This summary describes an imaging device, not a machine learning algorithm that requires a "training set."
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How the ground truth for the training set was established:
- Not applicable. As above, no training set for a machine learning model is described.
Summary of Limitations:
This document is a 510(k) Premarket Notification, which aims to demonstrate that a new device is "substantially equivalent" to a predicate device already on the market. It is not a detailed clinical study report providing exhaustive data on performance against specific acceptance criteria, expert involvement, or AI-specific metrics. The "clinical studies" mentioned are likely part of the evidence supporting the claim of effectiveness and substantial equivalence, but their methodologies and results are not presented in detail within this summary.
§ 886.1570 Ophthalmoscope.
(a)
Identification. An ophthalmoscope is an AC-powered or battery-powered device containing illumination and viewing optics intended to examine the media (cornea, aqueous, lens, and vitreous) and the retina of the eye.(b)
Classification. Class II (special controls). The device, when it is an AC-powered opthalmoscope, a battery-powered opthalmoscope, or a hand-held ophthalmoscope replacement battery, is exempt from the premarket notification procedures in subpart E of part 807 of this chapter subject to the limitations in § 886.9.