The invention pertains to improved monitoring of intraocular pressure (IOP) for diagnostics and treatment of eye disease.
The current standard in intraocular pressure (IOP) monitoring is to represent IOP data by a linear x-y graph (e.g., time versus IOP) based on limited discrete data points (rarely for more than a few days and typically based on one measurement or a few measurements per day), such as shown in
The polygonal chain representation seen in
Therefore, there exists a need for an approach that allows for improved monitoring of IOP and assessments to provide improved risk assessment and treatment of patients having elevated IOP associated with glaucoma.
In one aspect, the present invention pertains to presenting IOP data as a circadian IOP profile on a polar plot of a 24-hr period to facilitate identification of cyclical variations of IOP data that occur on a daily basis. These variations can be associated with structural and functional assessments to facilitate improved diagnosis and treatment of patients having elevated IOP associated with eye disease.
In one aspect, the method pertains to a method of diagnosing and/or treating an eye of a select patient, that includes steps of: receiving a first plurality of intraocular pressure (IOP) measurements over a first 24-hour period from the select patient and determining a circadian IOP profile in a polar format based on the plurality of IOP measurements. The method can further include receiving a second plurality of intraocular pressure measurements over a second 24-hour period such that the circadian IOP profile is based on both the first and second plurality of IOP measurements (e.g., average between multiple days). In some embodiments, the method entails displaying the circadian IOP profile on a graphical user interface along with a targeted IOP band of suitable IOPs between an upper and lower limit. The circadian IOP profile can also be displayed along with a baseline IOP profile for ease of comparison. The method can receive the IOP measurements from an implantable IOP sensor device having an IOP sensor portion that is disposed entirely within the vitreous body of the eye of the select patient or any suitable IOP sensor.
Such methods can further include: determining a pattern of exceedances of the circadian IOP profile from the target IOP range (e.g., a number, quantity, timing, duration of exceedances, or any combination thereof). The method can then compare the circadian IOP profile of the select patient with a plurality of circadian IOP profiles of a first set of patients; and determine a risk assessment of the select patient and/or a course of treatment based on the comparison. In some embodiments, the method compares the pattern of IOP exceedances for the select patient with a library of patterns from one or more sets of patients. In some embodiments, the baseline IOP between patients is also accounted for.
Methods of treatment can further include: receiving a second plurality of IOP measurements from the select patient during treatment; determining an updated circadian IOP profile from the second plurality of IOP measurement; determining an updated pattern of IOP exceedances from the updated circadian IOP profile; and determining an updated risk assessment and/or course of treatment based on the comparison.
In another aspect, methods of diagnosis and/or treatment can include: obtaining a circadian IOP profile from multiple patients that are associated with one or more of a structural assessment and a functional assessment to determine a relationship or associated between IOP profile and structural and/or functional damage. The method can further include obtaining a circadian IOP profile from a select patient and determining one or more attributes of the IOP profile and determining a risk assessment for structural and/or functional damage based on the determined relationship. In some embodiments, this relationship is defined within a library or lookup table.
In yet another aspect, the invention pertains to a system for diagnosis and/or treatment of an eye of a select patient, the system including a graphical user interface; and a processor having a memory with programmable instructions recorded thereon, the instructions configured to: receive a first plurality of intraocular pressure (IOP) measurements over a first 24-hour period from the select patient and output to the graphical user interface, a circadian IOP profile in a polar format based on the plurality of IOP measurements. The system can further be configured to determine a pattern of exceedances of the circadian IOP profile from a suitable range of IOP (e.g., a number, quantity, timing, or duration of exceedances). The system can then compare the circadian IOP profile of the select patient with multiple circadian IOP profiles from a first set of patients; and determine a risk assessment of the select patient and/or a course of treatment based on the comparison. In some embodiments, the method compares a pattern of IOP exceedances for the select patient with a library of exceedance patterns from a first set of patients. The system can further include an implantable IOP sensor device having an IOP sensor portion that is disposed entirely within the vitreous body of the eye of the select patient or any suitable IOP sensor.
Other features and advantages of the invention shall be apparent based upon the accompanying description, drawings, and claims.
Although this disclosure is detailed enough to enable those skilled in the art to practice the invention, the embodiments herein disclose mere examples of the invention and may be embodied by varying approaches without departing from the scope and spirit of the
I. Circadian IOP Profile/Targeted IOP Profile (TIP)
In one aspect, the invention shifts the paradigm from considering discrete IOP data points to providing an IOP profile determined from sufficiently high frequency sampling of IOP so as to allow identification of regular or cyclical variations of IOP. In some embodiments, the IOP profile is a circadian profile, for example a profile of IOP data over a 24-hr period presented in a polar graph. In some embodiments, the IOP profile provides a higher accuracy (+/−1 mmHg) with an IOP dataset of 24 hours increments (e.g., from minutes to hour sampling). Such an approach allows a physician to identify a circadian rhythm of IOP variations, and a range of patterns can be defined and identified. In some embodiments, such IOP profiles are obtained from multiple patients across one or more patient populations and compared with various other patient attributes and/or assessments such that broader relationships between patterns in IOP profiles and eye conditions can be ascertained. Such comparisons can be performed across relatively large numbers of patients through data-mining (e.g., AI and Deep learning) so as to allow identification of relationships that otherwise could not be determined.
In some embodiments, multiple IOP measurements are obtained from an implantable sensor implanted within the eye. Preferably, the sensor is implanted so that a sensor portion is implanted entirely within the vitreous body so as to obtain improved measurements of IOP, for example by the implantation approach described in U.S. Patent Application No. 62/019,826, which is incorporated herein by reference, or any suitable implantation approach. Such a sensor can include any of the configurations depicted in U.S. Patent Application No. 62/019,841, which is incorporated herein by reference, or any suitable sensor. Further, it is desirable for the IOP sensor to obtain high frequency sampling (e.g., from minutes to hour sampling) and facilitate telemetry of the obtained measurements, for example by any of the approaches described in U.S. Patent Application No. 62/044,895, which is incorporated herein by reference, or any suitable approach.
Such a presentation can be presented on a graphical user display of a treatment system, which can include any computing device (e.g., laptop, tablet, smartphone) of a clinician, to facilitate identification of variations of IOP due to cyclical patterns and/or circadian rhythm. While represented as a 24-hr period, this representation can aggregate IOP data collected from each day over longer periods of time (e.g., over an entire month). Such a presentation of IOP data allows the physician to identify cyclical trends that occur over a 24-hr period, which can be used to identify: a signature of non-compliance, dosage issues, multiple drugs combinations, drug interference, drug latency (e.g., pharmaco-kinetics) and also to define the effectiveness pattern of a specific drug specific to a specific patient (i.e., a personalized response). This is especially important to in managing therapy so as to adequately maintain IOP below the targeted IOP maximum value to prevent progression of the disease. This representation is disease agnostic and can also provide detailed metrics for more effectiveness comparisons. Examples of such circadian IOP profiles presented with a targeted IOP profile is shown in
This relationship can be graphically represented to the user as shown, or by various other graphical representations (e.g., a heat map indicating IOP exceedance by time of day). This understanding of cyclical variations of IOP data improves monitoring and management of IOP to achieve a targeted maximum IOP value to prevent progression of eye disease. The polar graph can further include additional parameters (e.g., oxygen, eye motion, ocular pulse amplitude, eyeball motion REM, etc.) to identify relationships between multiple factors.
The Targeted IOP Profile (TIP) is defined as the band of suitable IOP that needs to be achieved by the therapy during any 24 period. In some embodiments, the circadian rhythm and presentation will also allow to overlap weeks, months and years of data but still allow the system to access any specific data point for specific time window of interest. In this embodiment, the TIP is defined as a target band of suitable IOPs that is defined between a lower IOP boundary 13 and an upper IOP boundary 14. Treatment aims to keep the IOP profile within the target band of acceptable IOP. The IOP profiles allows the physician to readily identify any variations in IOP that exceed the targeted IOP band as well as the duration of each exceedance and the total exceedance during a 24-hr period. In some embodiments, the multiple IOP profiles are superimposed on a single graph. In some patients, IOP pressures are fairly consistent between eyes such that the IOP pressures can be adequately represented by a single composite profile.
It is understood that this is but one example of a circadian IOP profile and that various other configurations could be realized, for example, multiple days could be plotted on a single graph (rather than max/min averages), or the various attributes of the graph can be adjustable by the user. The described approach of a circadian IOP profile allows a clinician quick determination of control over the indicated time period, comparisons to the baseline, ready visualization of the variation of IOP during the course of the day (e.g., day versus night), and simplifies display of a summary of long-term data. The polar diagram can also be used at different level of details and also define a framework to identify alerts (e.g., high-pressure excursion during surgery for acute, trauma on eyeball with impact, change of patient in the hemodynamic conditions with supine or prone positions, patients activities).
It is appreciated that various other parameters could be included with the circadian IOP profile as well. Other parameters might include dynamically monitoring like level of oxygen saturation, eye motion (REM during sleep), ocular pulse amplitude or OPA (for blood perfusion monitoring), cardiac conditions such as CAS (Carotid Artery Stenosis) which can be estimated using OPA amplitude reduction, or any attribute desired.
As shown above in
II. Integrated TIP to RNFL/VF
In another aspect, the circadian IOP profile can be included within a data visualization model that allows through specific medical studies to cross-link IOP, RNFL (retinal fiber layer) structural changes and VF (visual field) functional change. Multiple studies have demonstrate that IOP levels directly affect the progression rate of glaucoma as initially structural changes will happen prior to functional/vision loss. This approach allows more complex relationships between IOP profiles and patterns in IOP variations and disease progression to be determined.
Due to the differences in data representation (e.g., time based IOP, imaging by OCT and HVF by perimetry), the analysis of such data may utilize advanced processing (e.g., advanced algorithms, AI, DL). The challenge, which falls into medical research, is to identify the pattern of IOP that will induce structural and functional changes within the retina/optic nerve. Examples of such data visualizations are shown below in
In another aspect, associating structural and functional assessment to circadian IOP profiles in multiple patients (e.g., hundreds of patients) allows for improved risk assessment in similar patients. Additionally, the IOP profiles can be further associated with one or more patients attributes (e.g., gender, age, baseline IOP, ethnicity, location, occupation, blood pressure, secondary disease, etc.) so as to further improve concordance between a select patient and relevant patient populations.
As shown in
In this embodiment, a circadian IOP profile of a select patient indicates a daily IOP exceedance of 110 minutes and a maximum duration of an individual exceedance event of 60 minutes. According to the lookup table based on associations of similar patients, these IOP profile attributes are associated with structural damage (x), which is on the verge of functional damage (o). In this embodiment, the association can further include a Patient Attribute Selection Menu 72 that allows the clinician to further refine the risk assessment by selecting attributes of the select patient to narrow the relevant patient population to similar patients. This approach can indicate the likelihood of structural and/or functional eye damage or a worsening disease state, even without repeating structural and functional testing with each visit. This approach can also be used in determining a course of treatment in order to prevent further progression of eye disease. While a lookup table is shown here, it is appreciated that this approach can be embodied entirely within the software instructions of a treatment system and is not required to be displayed. Further, it is appreciated that this example illustrates a relationship between two attributes of the IOP profile and that various other algorithms can be used to associate additional attributes.
the select patient based on any of: a circadian IOP profile, structural and functional assessments and the determined relationship. The method can further include a step of: receiving another circadian IOP profile during treatment and determining an updated diagnosis/and treatment based on the determined relationship.
In another aspect, after patterns of variation in IOP are identified and characterized, these patterns can be recognized from a collection or library of IOP data accumulated from multiple patients (e.g., by AI/DL). If the monitoring was done prior to the onset of the disease, this further allows for early detection and prevention by entering into a therapy that will maintain/shape the IOP profile towards the targeted IOP profile. It is recognized that IOP is defined as a risk factor and not as a diagnostic for glaucoma. The disease progression and understanding in conventional treatment approaches has significant gaps and lacking clear explanation into a multi-factorial paradigm that hasn't previously been modeled or quantified. One focus of the circadian rhythm plot of IOP is to represent and extract the dynamic state of the disease with IOP for primary open angle glaucoma (POAG) but in some cases, like normal tension glaucoma (NTG) (IOP<26 mmHg), these factors are more related to blood perfusion, oxygen saturation level and other hemodynamic factors (e.g., low blood pressure, oxidative stress due to large oxygen variation during sleep apnea). Thus, in some embodiments, other parameters (e.g., oxygen saturation level (oximetry) variation) could also be represented using such circular, circadian graph along with blood pressure, eyeball motion (REM) during sleep, blood pressure) to further inform diagnosis and treatment.
The foregoing is considered as illustrative only of the principles of the invention. Furthermore, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described. While the preferred embodiment has been described, the details may be changed without departing from the invention, which is defined by the claims.
The present application claims the benefit under 35 USC § 119(e) of U.S. Provisional Appln. No. 63/158,073 filed Mar. 8, 2021; the full disclosure which is incorporated herein by reference in its entirety for all purposes. The present application is generally related to the following co-assigned applications: U.S. Pat. No. 10,213,107 entitled “Methods and Devices for Implantation of Intraocular Pressure Sensors”; U.S. Publn. No. 2016/0000344 entitled “Hermetically Sealed Implant Sensors with Vertical Stacking Architecture”; U.S. Publn. No. 2016/0058324 entitled “Ultra Low Power Charging Implant Sensors with Wireless Interface for Patient Monitoring”; and PCT Publn No. WO 2021/003434 entitled “Hermetic Heterogeneous Integration Platform for Active and Passive Electronic Components”; all of which are incorporated herein by reference in their entirety for all purposes.
Number | Date | Country | |
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63158073 | Mar 2021 | US |