Light therapy system

Abstract

A phototherapy system comprises a pressure cuff system and a light emitting system. The pressure cuff system has a cuff that can be positioned on or near a user's body part and can receive pressurized air to selectively pressurize and depressurize the cuff. The light emitting system has a support structure and a light emitter positioned on the support structure, the light emitter being controllably powered. The support structure can be positioned on the inner surface of the cuff so that the light emitter can direct light onto the body part. The phototherapy system may also include a controller capable of controllably supplying power to the light emitter, wherein the controller can adjust the intensity or duration of the light directed onto the body part in response to inputs or measurements related to the state of the body part. A photometer may be provided separately or integrally to measure the state of the body part. A method for providing phototherapy is also provided.

Description

[0001] Cross-reference to related applications

[0002] This application claims the benefit of U.S. Provisional Patent Application 62 / 802,686, filed February 7, 2019, the entire contents of which are incorporated herein by reference. Background Technology

[0003] Photobiomodulation (PBM), or low-level phototherapy (LLLT), involves applying light from lasers and light-emitting diodes (LEDs) to living tissue to produce a photobiostimulation effect. The application of laser and LED light to living tissue is performed using wavelengths between 600 and 1000 nm and power levels from 5 to 500 mW. Studies have shown that PBM accelerates wound healing, improves microcirculation, and enhances muscle performance. In most studies, an infrared (IR) light source is placed on or near the body surface to produce 0.5 to 5.0 J / cm². 2 Therapeutic doses of light. Various light sources include commercially available LEDs and laser diodes packaged in integrated circuits. Some laser-based devices are pulsed to deliver higher instantaneous radiation intensity without thermally damaging the tissue being treated.

[0004] A biphasic dose-response effect has been well established in PBM treatment, where any therapeutic benefit diminishes above and below a certain optimal dosage range. Therefore, precise dose-directed PBM administration to muscles is crucial for obtaining benefits, but this is hampered by the limited and variable penetration depth of IR light, which is applied to the skin surface to treat tissues beneath the skin.

[0005] Within tissues, photons are either scattered or absorbed. The therapeutic benefit is achieved when light is absorbed by mitochondria in muscles. In most parts of the body, some IR light penetrates the skin, while the underlying fat layer scatters photons in a random pattern. Some photons continue to the underlying muscle fibers, where the IR energy is absorbed by chromophores. The beneficial effects of IR radiation from muscle tissue increase mitochondrial membrane potential, oxygen consumption, and adenosine triphosphate (ATP) production. Delivering a precise dose of IR fluence to the body's muscles is challenging because humans have varying levels of melanin in the skin and thickness of the fat layer throughout the body.

[0006] Near-infrared photometry is used in some commercial products (such as lipid analyzers, SAT meters, and FUTREX) to non-invasively measure subcutaneous fat thickness. This method uses light transmitted into the skin by an infrared emitting diode. This radiation penetrates the tissue and is reflected, absorbed, and scattered according to the tissue's optical properties. The radiation emitted from the skin is detected at multiple distances between the source and detector of the optical measurement system and is then processed to infer the amount of light absorbed by the skin and reflected back from the fat layer.

[0007] Intermittent pneumatic compression (IPC) devices are medically used to help prevent blood clots (deep vein thrombosis) in the deep veins of the legs. These devices use inflatable cuffs typically placed around the legs. The cuffs are filled with air and compress the legs. After the air is released, blood flows back through the veins, helping to prevent blood clots. Recently, these devices have been used by athletes to improve circulation and promote muscle recovery after exercise. Furthermore, IPC devices are commercially available and are often marketed as providing automated massage therapy. IPC devices come in various forms to treat different parts of the body and muscle groups. Leg units cover the feet and legs up to the thighs. Shorts begin above the knee and extend upwards above the waist. Some cuffs cover the hands and arms up to the shoulders.

[0008] Therefore, an improved phototherapy system is needed. A phototherapy system with improved and / or more consistent dose delivery is also needed. A phototherapy system with improved light delivery to muscle is also needed. Improved and / or synergistic measurement of fat layer thickness is also needed. A phototherapy system for use in conjunction with an intermittent pneumatic pressurization device is also needed. Summary of the Invention

[0009] The present invention addresses these needs. In one aspect of the invention, an improved phototherapy system and an improved method of providing therapeutic light are provided.

[0010] In another aspect of the invention, a phototherapy system and method of use provides improved and / or more consistent dose administration.

[0011] In another aspect of the invention, a phototherapy system and method of use provide an improved delivery of phototherapy to the user's muscles.

[0012] In another aspect of the invention, a phototherapy system and method of use utilize fat layer thickness information to improve phototherapy.

[0013] In another aspect of the invention, a phototherapy system and method of use utilize skin color information to improve phototherapy.

[0014] In another aspect of the invention, an improved method for measuring and measuring fat layer thickness is provided.

[0015] In another aspect of the invention, a phototherapy system and method of use are used in conjunction with an intermittent pneumatic pressurization device.

[0016] In another aspect of the invention, a phototherapy system includes: a pressure cuff system comprising a cuff positioned on or near a user's body part and receiving pressurized air to selectively pressurize and depressurize the cuff; and a light emission system comprising a support structure and a light emitter positioned on the support structure, the light emitter being controllably powered; wherein the support structure is positioned on an inner surface of the cuff such that the light emitter can direct light onto the body part, and wherein the light emitter has a light emitting surface at a sufficient height above the support structure such that when the cuff is pressurized, the light emitting surface can be pressed into the skin and fat layer of the body part.

[0017] In another aspect of the invention, a phototherapy system includes: a pressure cuff system comprising a cuff positioned on or near a user's body part and receiving pressurized air to selectively pressurize and depressurize the cuff; and a light emission system comprising a support structure and a light emitter positioned on the support structure, the light emitter being controllably powered; wherein the support structure is positioned on an inner surface of the cuff such that the light emitter can direct light onto the body part, and wherein the light emitter has a light emitting surface at a sufficient height above the support structure such that when the cuff is pressurized, the light emitting surface can be pressed into the skin and fat layer of the body part, wherein the light emitter includes a plurality of light emitter arrays, each light emitter array being associated with a different muscle group of the body part.

[0018] In another aspect of the invention, a phototherapy system includes: a pressure cuff system comprising a cuff positioned on or near a user's body part and receiving pressurized air to selectively pressurize and depressurize the cuff; and a light emission system comprising a support structure and a light emitter positioned on the support structure, the light emitter being controllably powered; wherein the support structure is positioned on an inner surface of the cuff such that the light emitter can direct light onto the body part, and wherein the light emitter has a light emitting surface at a sufficient height above the support structure such that when the cuff is pressurized, the light emitting surface can be pressed into the skin and fat layer of the body part, and the phototherapy system further includes a photometer capable of measuring characteristics of the body part.

[0019] In another aspect of the invention, a phototherapy system includes: a pressure cuff system comprising a cuff that can be positioned on or near a user's body part and can receive pressurized air to selectively pressurize and depressurize the cuff; a light emitting member comprising a support structure and a light emitter positioned on the support structure, wherein the support structure can be positioned on an inner surface of the cuff such that the light emitter can direct light onto the body part; and a controller capable of controllably supplying power to the light emitter, wherein the controller can adjust the intensity or duration of the light directed onto the body part in response to inputs or measurements related to the state of the body part.

[0020] In another aspect of the invention, a phototherapy system includes: a pressure cuff system comprising a cuff that can be positioned on or near a user's body part and can receive pressurized air to selectively pressurize and depressurize the cuff; a light emitting member comprising a support structure and a light emitter positioned on the support structure, wherein the support structure can be positioned on an inner surface of the cuff such that the light emitter can direct light onto the body part; and a controller capable of controllably supplying power to the light emitter, wherein the controller can adjust the intensity or duration of the light directed onto the body part in response to inputs or measurements related to the state of the body part, wherein the controller adjusts the intensity or duration of the light in response to the thickness of the fat layer of the body part.

[0021] In another aspect of the invention, a phototherapy system includes: a pressure cuff system comprising a cuff that can be positioned on or near a user's body part and can receive pressurized air to selectively pressurize and depressurize the cuff; a light emitting member comprising a support structure and a light emitter positioned on the support structure, wherein the support structure can be positioned on an inner surface of the cuff such that the light emitter can direct light onto the body part; and a controller capable of controllably supplying power to the light emitter, wherein the controller can adjust the intensity or duration of the light directed onto the body part in response to inputs or measurements related to the state of the body part, and the phototherapy system further includes a photometer, wherein the controller adjusts the intensity or duration of the light in response to a signal from the photometer.

[0022] In another aspect of the invention, a phototherapy system includes: a pressure cuff system comprising a cuff that can be positioned on or near a user's body part and can receive pressurized air to selectively pressurize and depressurize the cuff; a light emitting member comprising a support structure and a light emitter positioned on the support structure, wherein the support structure can be positioned on an inner surface of the cuff such that the light emitter can direct light onto the body part; and a controller capable of controllably supplying power to the light emitter, wherein the controller can adjust the intensity or duration of the light directed onto the body part in response to inputs or measurements related to the state of the body part, the phototherapy system further comprising a plurality of photometers, wherein the controller adjusts the intensity or duration of the light in response to signals from the photometers, wherein the photometers generate signals regarding the thickness of the fat layer of the body part or regarding the transmittance of the body part, wherein the light emitter comprises a plurality of light emitter arrays, each light emitter array being associated with a different muscle group of the body part, and wherein each photometer can be positioned proximal to the corresponding array on the inner surface of the cuff.

[0023] In another aspect of the invention, a method of providing phototherapy includes: providing a pressure cuff having a light emitter on its inner surface; positioning the cuff on or near a body part; inflating the cuff and pressing the light emitter directly or indirectly against the skin of the body part; determining the intensity or duration of light applied to the body part from the light emitter relative to the state of the body part; and providing power to the light emitter such that light is applied to the body part with the determined intensity or duration.

[0024] In another aspect of the invention, a method of providing phototherapy includes: providing a pressure cuff having a light emitter on its inner surface; positioning the cuff on or near a body part; inflating the cuff and pressing the light emitter directly or indirectly against the skin of the body part; determining the intensity or duration of light applied to the body part from the light emitter relative to the state of the body part; and providing power to the light emitter such that light is applied to the body part at the determined intensity or duration, further using a photometer to measure the state of the body part and using the measurement results to determine the intensity or duration of light.

[0025] In another aspect of the invention, a phototherapy system includes a photometer having a photometer light emitter in a concentric ring and a central photodetector.

[0026] In another aspect of the invention, a method of providing light therapy includes: providing a photometer; using the photometer to determine the state of a body part; and applying light therapy to the body part with an intensity or duration related to the state of the body part. Attached Figure Description

[0027] These features, aspects, and advantages of the invention will become better understood in conjunction with the following description, the appended claims, and the accompanying drawings illustrating exemplary features of the invention. However, it should be understood that, in general, each of these features can be used throughout the invention, not just in the context of a particular drawing, and the invention includes any combination of these features, wherein:

[0028] Figure 1A This is a schematic side view of the phototherapy system according to the present invention;

[0029] Figure 1B It is in an unpressurized state. Figure 1A A schematic cross-sectional view of a phototherapy system;

[0030] Figure 1C It is under pressure. Figure 1A A schematic cross-sectional view of a phototherapy system;

[0031] Figure 2A This is a schematic top view of the light emitter array scheme of a phototherapy system;

[0032] Figure 2B This is a schematic top view of another scheme for the light emitter array of a phototherapy system;

[0033] Figure 3A This is a schematic top view of the monitoring system of the phototherapy system;

[0034] Figure 3B yes Figure 3AA schematic side view of the monitoring system;

[0035] Figure 3C This is a schematic top view of another possible monitoring system for a phototherapy system;

[0036] Figure 4 This is a schematic side view of another embodiment of the phototherapy system of the present invention;

[0037] Figure 5 It is a schematic open view of the arrangement of the light emitters in a phototherapy system;

[0038] Figure 6 This is a schematic exploded view of the pressure cuff system of the phototherapy system;

[0039] Figure 7 It is a schematic representation of the display of the controller of the phototherapy system;

[0040] Figure 8A This is a schematic exploded view of another embodiment of the pressure cuff system for phototherapy.

[0041] Figure 8B This is a schematic exploded view of another embodiment of the pressure cuff system for phototherapy.

[0042] Figure 9A This is a graph showing the results of multiple simulations using infrared photons, which varied melanin content ranging from fair to dark skin color and fat thickness ranging from 3 mm to 10 mm; and

[0043] Figure 9B It is a graph showing how the re-emission of light from the skin surface varies with distance from the light emitter. Detailed Implementation

[0044] This invention relates to a phototherapy system. In particular, it relates to a phototherapy system comprising or capable of being used with a pressure cuff. Although the invention is shown and described in a context that can be associated with intermittent pneumatic compression, it can be used in other ways, as will be readily apparent to those skilled in the art. Therefore, the invention should not be limited to the examples and embodiments described herein.

[0045] Figure 1A A phototherapy system 100 of the present invention is shown. The phototherapy system 100 includes, or can be used with, a pressure cuff system 105. The pressure cuff system 105 includes a pressure cuff 110 that can be received around, adjacent to, or near at least a portion of a body part (such as a limb). Figure 1A In the diagram, the cuff 110 is shown encircling the user's leg 115. The pressure cuff system 105 also includes a control system 120 for controlling and / or monitoring the pressurization of the cuff 110. The control system 120 includes a pressure controller 125 capable of controlling the operation of an air pump 130 (such as an electric air pump or a pressurized air source) so that pressurized air can be passed through a line 135 leading to the cuff 110 to inflate or pressurize the cuff 110. The pressure controller 130 may receive information from a pressure sensor 140 and may control the application of pressure to the cuff 110 in response to received pressure data. The pressure controller 130 may also be able to control a pressure gate 145 within the line 135. The pressure gate 145 may include a solenoid and / or a venting mechanism to allow the cuff 110 to be selectively pressurized and depressurized.

[0046] The phototherapy system 100 also includes a light emitting system 150, which is positionable within the cuff 110 of the pressure cuff system 105, such that light can be applied to a portion of the leg 115 or other body parts within the cuff 110. The light emitting system 150 includes one or more light emitting elements 155, each including a support structure 160 supporting one or more light emitters 165. The light emitting system 150 is controllably connected to a control system 120, such as a light emitting controller 175, via wire 170 and / or wireless technology. The light emitting controller 175 is capable of controlling and / or monitoring the application of light, including the dose or amount of light applied to the leg 115 or other body parts. The dose or amount of light applied refers to the intensity and / or duration of the light application. Optionally, the light emitting controller 175 may be incorporated into or communicated with a pressure controller 125, such that the application of pressure and the application of light can respond to each other and / or work together. The support structure 160 may take the form of a printed circuit board or the like, through which power is supplied to and / or control is provided to each optical transmitter 165.

[0047] Figure 1B and Figure 1C A cross-sectional view of a light emitting system 150 is shown, positioned within the cuff 110 of a pressure cuff system 105 such that a light emitter 165 can be located near the leg 115 or other body part and can deliver light to the body part. For example, the light emitting member 155 or the light emitter 165 may be positioned on the inside or inner surface of the cuff 110. The cuff 110 is made of a flexible material and includes a hollow space 180 communicating with a conduit 135 for pressurized air. This hollow space 180 can be selectively pressurized and depressurized to inflate and deflate the cuff 110. Figure 1B The cuff is shown in its unpressurized state, while Figure 1CThe cuff is shown in a pressurized state. As can be seen, in the unpressurized state, the light emitter 165 rests or abuts against the skin 185 of the leg 115 or other body parts, and the skin 185 does not exhibit significant deformation. However, when in a pressurized state... Figure 1C Under the pressure shown, the pressure of the cuff 110 presses the light emitter 165 into the skin 185. When sufficient pressure is applied, the light emitter 165 can be further pressed into the fat layer 186, bringing it close to the muscle 187. Optionally, if it is necessary to increase the thickness of the light emitter 165 and extend the distance between the light emitter and the support structure 160, a spacer 190 or the like can be provided. Also optionally, a cover layer 195 made of a light-transmitting material can be provided to cover the light emitter 165 so that it does not directly contact the skin 185. Alternatively, the cover layer 195 can be removed, and the light emitter can directly contact the skin 185.

[0048] In one embodiment, a phototherapy system 100 can be used to apply therapeutic light to the leg 115 or other body parts within or near a cuff 115. For example, the phototherapy system 100 can be used to apply photobiomodulation therapy (also known as low-level phototherapy), in which light from a laser or light-emitting diode (LED) is applied to living tissue. When applied using light from each light source with wavelengths varying between approximately 600 and 1000 nm and power varying from approximately 5 to 500 mW, the applied therapeutic light produces a photobiostimulatory effect. Photobiostimulatory effects have been shown to accelerate wound healing, improve circulation, and / or improve muscle performance. The phototherapy system 100 of the present invention improves upon previous attempts at phototherapy by incorporating phototherapy within a pressure cuff system 105, which applies pressure to a light emitting system 150 to press the light emitter 165 into the skin 185 and closer to the muscle 187 or other treatment targets. By positioning the light emitter 165 closer to the muscle, better therapeutic effects and / or higher light application efficiency can be achieved. When light is applied to the surface of the skin 185, photons are either scattered or absorbed. Scattering is particularly prevalent in adipose tissue 186. The closer positioning of the light emitter 165 to the muscle 187 and the compression of the adipose layer 186 allow for increased absorption of photons by the muscle and reduced scattering. The therapeutic effect is achieved when photons are absorbed by the mitochondria in the muscle. Beneficial effects of photon absorption are thought to include increased mitochondrial membrane potential, oxygen consumption, and adenosine triphosphate (ATP) production.

[0049] In one embodiment of a phototherapy system, one or more light emitters 165 include one or more light-emitting diodes. In one particular embodiment, the light emitter 165 is configured to emit light consisting of wavelengths in the near-infrared range, or from about 780 nm to about 1000 nm. While it is possible to use light outside this range, studies have shown that light in this wavelength range is preferred for muscle therapy because shorter wavelengths cannot penetrate as far into the tissue, and longer wavelengths are less effective at stimulating muscle mitochondria.

[0050] In one embodiment of the phototherapy system 100, the light emitter 165 is sized and shaped to penetrate into the fat layer 186 when the cuff 110 is pressurized, allowing the light emitter to approach the underlying muscle 187. The light emitter 165 has a light-emitting surface that contacts the skin 185 directly or through a covering layer 195. In one embodiment, the height of the light-emitting surface above the support structure or inner surface of the cuff 110 (i.e., the light-emitting surface is away from said support structure or inner surface) is at least about 1 mm, or at least about 2 mm, or at least about 3 mm, or at least about 5 mm, or at least about 10 mm. A spacer 190 may be provided if needed, or the light emitter 165 may be designed to have a desired height. In one embodiment, light emitters of different heights may be provided to accommodate different fat layer thicknesses of the user.

[0051] Figure 2A and Figure 2B A scheme for a light emitting component 155 is shown, which is designed to provide an array 200 of light emitters 165. The array 200 may include a plurality of light emitters 165 arranged in any suitable manner. An array of light emitters refers to a group of multiple light emitters 165 that can be supplied with power by a light emitter controller at the same or similar intensity and duration. The array 200 may be on a single printed circuit board, or it may be on multiple printed circuit boards, and a single printed circuit board may contain one or more arrays 200. For example, Figure 2A Array 200 is a multidimensional array 205, and Figure 2BThe array 200 is a one-dimensional array 210 or a strip of light emitters 165 generally positioned in a straight line. The light emitting system 150 may include one or more such arrays 200. For example, in one embodiment, the array 200 may surround all or almost all of the interior of the cuff 110. In another embodiment, one or more arrays 200 may be positioned within the cuff 110 such that they each apply light to a specific, relevant area or muscle on a body portion within the cuff 110. For example, in one particular embodiment, one or more arrays 200 of light emitters 165 can be attached to the cuff 110 in independently controlled groups corresponding to target leg muscle groups, such as the quadriceps, hamstrings, and / or gastrocnemius. Alternatively or additionally, other muscle groups or other tissues may be targeted. In one embodiment, one or more arrays 200 are individually integrated circuits mounted to a flexible printed circuit board that can be attached to the cuff 110. In one configuration, one or more arrays 200 are connected in series to a main two-connector power wire, which is connected to an optical transmitter controller 175.

[0052] A light emission controller 175 controls the operation of one or more light emitters arranged in an array 200 in a predetermined manner. The light emission controller 175 provides power to one or more light emitters 165 such that light of predetermined intensity and / or duration can be applied to a body portion of the light emitter near or in contact with it. Power and / or duration can be applied to a single light emitter 165 or multiple light emitters 165. When the light emission controller 175 provides power to multiple light emitters 165, power can be supplied independently or in one or more arrays 200, wherein each array 200 comprises a group of light emitters 165, which will be collectively powered to the group at the same or similar intensity and for the same or similar duration. The intensity and / or duration of light applied to each light emitter 165 and / or each array 200 can be input into the controller by a user communicating with the controller via a user interface. Alternatively, the intensity and / or duration can be automated. For example, in one embodiment, the light emission controller may be connected to the pressure controller 125 or other monitor and may adjust the application of light in response to pressure applied to the cuff 110. For instance, light application may be more efficient by applying light to the body part only when the cuff 110 is pressurized, because it is during this pressurized state that light is more suitably transmitted to the muscles 187. Alternatively, light may be maintained even when the cuff 110 is not pressurized. Furthermore, alternatively or additionally, the intensity and / or duration may be adjusted in response to other signals or states as discussed below.

[0053] In one approach, the intensity and / or duration of light applied by light emitters 165 and / or one or more light emitters 165 arranged in an array 200 can be selected or adjusted based on factors associated with the body part to be treated. For example, one factor that can be used to adjust the intensity and / or duration of light application is the thickness of the fat layer 186 of the body part. Because light scattering is particularly prevalent in adipose tissue, the thicker the fat layer 186, the more light is scattered, and the greater the light application intensity and / or the longer the duration required to achieve the desired amount of light application. Therefore, in one approach, the thickness of the fat layer 186 of the body part can be measured, such as by calipers or by an electronic monitor, and the intensity and / or duration of light application can be set based on the measurement results. The operator of the phototherapy system 100 can, for example, input the desired intensity and / or duration into the light emission controller 175 after referring to charts, tables, etc., containing empirical data on the state of the fat layer, or the light emission controller can be pre-programmed using empirical data so that the operator can input measurement information and the light emission controller 175 can automatically adjust the intensity and / or duration of the applied light. Alternatively, when using an electronic monitor, a signal related to the fat level state can be provided to the light emission controller 175, and adjustments can be made in response to this signal. Another factor that can be used to adjust the intensity and / or duration of the applied light is skin color. Skin color can affect the transmittance of the applied light. Therefore, in one aspect of the invention, skin color can be assessed or monitored, and the light intensity and / or duration can be adjusted based on skin color in a manner similar to that described above in conjunction with fat state. In yet another aspect, both fat layer thickness and skin color can be used to adjust the intensity and / or duration of the light.

[0054] In one embodiment, the light therapy system 100 may further include a light sensing system 300, such as in Figure 3A and Figure 3B As shown in the diagram. Figure 3A and Figure 3B In this scheme, the light sensing system includes a photometer 305, such as a reflectometer. The photometer 305 comprises a photodetector 310 and a plurality of photometer light emitters 315, such as infrared light emitting diodes. The photodetector 310 and the photometer light emitters 315 are fixed to a substrate 320. The photometer 305 includes a type where the photodetector 310 and the photometer light emitters 315 are logarithmically spaced apart from the photodetector 310. For example, the photometer light emitters 315 may be infrared light emitting diodes placed at distances of 3 mm, 6 mm, 12 mm, 24 mm, and / or 48 mm from the photodetector 310. The photodetector 310 may include a filter on the sensor to detect only light within a narrow wavelength range near the peak emission wavelength of the infrared light emitting diode 315. In applications such as... Figure 3A and Figure 3B In the illustrated configuration, as shown, five photometer light emitters 315 and photodetectors 310 are mounted on a rigid substrate 320 such that their relative spacing is maintained when the cuff 110 is inflated. The photometer light emitter power lines and sensor lines can be bundled together, thus connecting the photometer 305 to a light emission controller 175. The light emission controller 175 controls the emission of light from the photometer light emitters 315 and receives output signals from the photodetectors 310. The light emission controller 175 can then process the data to determine the quality of light transmission into the leg 115 or other body parts. An optional pressure sensor 330, as discussed below, may also be provided.

[0055] In use Figure 3A and Figure 3B In the process of photometer 305, infrared photons from photometer light emitter 315 are applied to skin 185. The photons are scattered, absorbed, or re-emitted at the skin surface. Skin 185 exhibits both light scattering and absorption properties. Absorption is more pronounced on darker skin with abundant melanin. Fat 186 can be approximated as the area with the most scattered infrared light. Muscle 187 tissue is primarily absorptive. The attenuation of light at the shortest distance between the first photometer light emitter 325 or a group of photometer light emitters and the photodetector 310 is highly correlated with skin light absorption, since the typical skin thickness on the trunk and limbs is approximately 3 mm between the first photometer light emitter 325 and the photodetector 310. Skin light absorption can be obtained from the following empirical relationship:

[0056] Skin absorption (cm) -1 ) = f(photodetector voltage from the first light emitter)

[0057] Light penetrating the skin layer is scattered in all directions by the fat layer 186. Some of this light leaves the body through the skin 185 and returns, and can be detected by the photodetector 310. Light passing through the fat layer 186 is absorbed by the muscle 187, where it provides the desired therapeutic effect. Above a thick fat layer, the amount of light re-emitted at the skin 185 will be higher than above a thin fat layer 186, where light can propagate to the muscle tissue 187 with less obstruction. Each photometer light emitter is turned on and off sequentially, so the output voltage from the photodetector 310 at different times corresponds to the diffuse reflectance at discrete distances on the skin surface. The thickness of the fat layer 186 is inferred from multiple measurements of the photometer light emitter 315 at different distances from the photodetector 310. The thickness of the fat layer 186 can be calculated from the following empirical relationship:

[0058] Fat thickness (mm) = g (photodetector voltage from all light emitters)

[0059] exist Figure 3C Another embodiment of the photometer 305 of the photosensing system 300 of the phototherapy system 100 is shown. Figure 3C The photometer 305 includes a circular geometry 335 of photometer light emitters 315, with a photodetector 310 located in the center of the circular geometry surrounded by one or more strings of photometer light emitters 315. Between the strings and the photodetector 310, each string corresponds to a unique distance, and each string can be independently controlled by a light emission controller 175. The current through each string of photometer light emitters 315 is modulated to provide a response at the photodetector 310 that is substantially consistent with typical skin color and fat thickness. The photodetector voltage response is located near the midpoint of the analog-to-digital converter's range to accurately measure diffuse reflectance with 10+ bit resolution.

[0060] In one embodiment, the light sensing system 300 can be used independently of the applied light. For example, before the cuff 110 is attached to a body part, the light sensing system 300 can be used to measure the body part, such as the thickness of the fat layer and / or the light transmittance. The measurement results can be delivered to the controller 175, input into the controller 175, and used to set the light emission controller 175, as discussed above.

[0061] In one embodiment, the light sensing system 300 can be integrated into the cuff 110 by being positioned within it and can be directly connected to the light emission controller 175. In this embodiment, a photometer 305 can be used to measure the body part before light is applied, thus allowing adjustment of the intensity and / or duration of the application. Alternatively, the photometer 305 can be used during light application. In one particular embodiment, the photometer 305 can be used to monitor the light transmittance during application, and this measurement result can be interpreted by the light emission controller 175, enabling automated adjustment of the intensity and / or duration of the light application. One or more photometers 305 can be positioned within the cuff 110 near one or more light emitters 165 of the array 200, allowing individual adjustment of the intensity and / or duration of light application for each array 200 in response to measurements from the photometers associated with the area where the array 200 is located. Adjustments to the intensity and / or duration can be made by an operator receiving a signal indicating the measurement result, or can be made automatically by the light emission controller 175 in response to a signal from the photometer 305. In one embodiment, the adjustment is made in real time by the light emission controller 175. For example, in one embodiment, the photometer 305 may be positioned or mounted near the center of each of one or more light emitters 165 arranged in an array 200.

[0062] In figures such as Figure 1 and Figure 4 In one embodiment shown, the light therapy system 100 may include a pressure cuff system 105 operating as an intermittent pneumatic compression (IPC) device 400. Intermittent pneumatic compression devices are medically used to help prevent clots in deep veins in the legs or other limbs. The intermittent pneumatic compression device 400 applies pneumatic pressure intermittently to the legs or other limbs or body parts. After the pressure is released, blood returns through the veins, thus helping to prevent blood clots. Intermittent pneumatic compression devices may also, or alternatively, be used by athletes to improve circulation and promote muscle recovery after exercise and / or for automated massage therapy.

[0063] exist Figure 4 In one embodiment, the pressure cuff system 105 includes a cuff 110 having a plurality of chambers 405, each pneumatically separated from the others. When used as an intermittent inflation pressurization device 400, the pressure controller 125 can individually pressurize and depressurize each individual chamber 405 for a desired effect, such as sequentially pressurizing chambers 405 in series to help promote blood flow. In another embodiment, the pressure controller 125 can pressurize each chamber 405 simultaneously, but in a different amount as desired.

[0064] exist Figure 4 The diagram also illustrates an exemplary light emitting system 150 having two or more light emitting elements 155 spanning multiple compartments 405 and a light sensing system 300 including photometers 305 positioned between the light emitting elements 155. In an alternative arrangement, each light emitting element 155 may be associated with a separate compartment 405, and a separate photometer 305 may be provided for multiple light emitting elements 155. A light emission controller 175 is electrically communicated with each light emitting element 155 via, for example, corresponding lines 410, 415, and with one or more photometers 305, such as via a bundled line 420, which can both supply power to the photometer light emitter 315 and receive output signals from a photodetector 310. The light emission controller 175 may include a processor and / or circuitry for controlling the light emitting elements 155, and may include input devices, such as a touchscreen for receiving operator input. The power supply voltage for the light emitter and the air pump 130 can be connected to a power grid power supply or a rechargeable battery to draw electrical power and supply power to the light emitter 165 as desired. The light emitting elements 155 can be arranged in an electrical series group such that the sum of the forward voltages of the light emitters 165 in the group matches the power supply voltage. An input device such as a touchscreen can be used by the user to set, for example, a desired muscle infrared dose.

[0065] The cuff 110 of the phototherapy system 100 may optionally include a side opening 425. The side opening 425 may be selectively opened to expose the interior of the cuff 110 and facilitate attachment of the cuff 110 to the leg or other limb or other body part. A closure 430, such as a zipper, may be provided to close the opening 425 when the cuff 110 is secured to the body part.

[0066] Figure 5 The specific cuff 110 and light emitting system 150 are shown. Figure 5 The optical emission system 150 includes a plurality of striped optical emitters 165, such as striped optical emitting diodes. In this configuration, each strip can operate as an optical emitter 165 in an array 200 or as an optical emitter 165 in a one-dimensional array 210. Alternatively, multiple strips can be grouped together to form a larger array 200 or a multi-dimensional array. Alternatively, the entire array of strips can collectively form a single array 200. Each one-dimensional array 210 may contain 2 to 100 optical emitters 165. In one configuration, there may be a range from 2 strips to about 50 strips, or from about 10 strips to about 40 strips, or from about 20 strips to about 30 strips, or about 26 strips. The total number of light emitters 165 can vary from 2 to about 20,000, or from about 50 to about 10,000, or from about 1,000 to about 5,000, and in a particular configuration there are about 4,800 light emitters. Photometers 305 can optionally be mounted near the center of the array 200 of independently controllable light emitters 165. The total number of photometers 305 can vary from 0 to 20, or from about 1 to about 5, and in a particular configuration there are four photometers 305, one on the right and one on the left of the lower leg, and one on the right and one on the left of the quadriceps.

[0067] Figure 6An exploded view of a pressure cuff system 105 of a phototherapy system 100 is shown, with the cuff open and laid flat. The pressure cuff system 105 includes a cuff 110 serving as an outer layer 600. An intermediate layer 605 includes one or more light-emitting members 155, a support structure 160, and a photosensing system 300. Optionally, the intermediate layer 605 may also include a reflective lining 610, such as a white lining. The reflective lining 610 may be attached to the cuff 110 and may be cut to the same size and shape as the cuff 110, or may be of a different size and shape. The attachment of the reflective lining 610 to the cuff 110 may be in the form of a zipper, hook-and-loop fastener, or a buckle strap around the edge of the cuff 110 and / or each cuff chamber 405 or each cuff chamber, allowing for easy removal and maintenance. The intermediate layer 605 may use a zipper or other fasteners compatible with commercially available cuffs. Each side of the intermediate layer 605 may have two fasteners, one for attaching to the cuff 110 and the other for closing the cuff 110 and intermediate layer 605 around the body. A reflective or white liner 610 improves the uniformity of light reaching the muscles. Light scattered back through the skin can be reflected back into the body by the reflective liner 610 to more efficiently increase the chance of photons reaching muscle tissue. An inner layer 615 may also be provided. The inner layer 615 may be made of a material optically transparent to infrared light (such as polyvinyl chloride, polyurethane, epoxy resin, acrylic resin, silicone resin, etc.) and may be attached to the intermediate layer 605 as a sheet using fastener material, or may be permanently attached to the intermediate layer 605. The purpose of the optically transparent inner layer 615 is to insulate the user from electrical components and to provide a cleanable surface that can be disinfected and wiped between uses. A permanent attachment option for the inner layer 615 is to be adhered to the intermediate layer 605 to create a durable product that provides protection for the light emitter 165 and photometer 305 against abrasion, etc. In this option, the inner layer 615 constitutes the optional overlay 195 discussed above. The light emitting components 155 can be arranged in electrical series groups such that the sum of the forward voltages of the light emitters in the group matches the power supply voltage of the light emitters. One or more series groups are connected to a main dual-connector power line, which ultimately connects to a light emitting controller 175 that can be separated from the intermediate layer 605. In one embodiment, the light emitting component 155 may include an infrared light emitting diode mounted to a heat-dissipating aluminum printed circuit board, which is attached to the white liner 610 using removable fasteners or permanent attachments.

[0068] In one embodiment, an intermediate layer 605 may be provided, and an inner layer 610 may be provided as an upgrade kit for existing intermittent inflation cuff assemblies. Alternatively, the pressure cuff system 105 may include a cuff 110 and an additional layer constructed together as a single unit.

[0069] In one embodiment of the phototherapy system 100, a photometer 305 may be mounted near the center of each muscle group array 200, thus allowing control and / or customization of the dose delivered by the light emitter 165 on the array 200 based on signals received from the photometer 305, as in Figure 6 As shown in the diagram. Alternatively, multiple photometers 305 may be associated with each array 200, such as by being distributed around the periphery or corresponding ends of the array 200. Alternatively, a single photometer 305 may be provided at a desired location.

[0070] Figure 7 An example of a user interface 700, such as a touchscreen 705, is shown, which allows a user to interact with the control system 120 and, in particular, with the light emission controller 175. The user interface 700 displays parameters and statuses for the infrared dose application of the phototherapy system 100 applied to the leg 115. For example, a user can use the user interface 700 to specify the desired muscle IR dose (in joules per centimeter) for each muscle group by using a “Change” tab or button. 2 In real time, the user interface 700 of the touchscreen 705 can display one or more parameter values ​​corresponding to fat thickness, skin light absorption, target muscle dose, progress toward delivering the muscle dose for each muscle group, and remaining time to complete the dosage. The touchscreen 705 may further facilitate, allow, or include a mechanism that would allow the user to reset the delivery dose counter and start and pause the ongoing dose administration via other labels or buttons 715.

[0071] Figure 8A and Figure 8B Different configurations of the pressure cuff system 105 of the phototherapy system 100 are shown. Figure 8A A pressure cuff system 105 in the form of intermittently inflatable pressure shorts 800 is shown, covering the large muscle groups of the thighs and buttocks. In this configuration, a muscle group array 200 is applied to the pressure shorts 800 covering the midsection of the body. When the mid-seat 805 of the shorts 800 is opened and laid flat, the muscle group array 200 is applied to areas corresponding to the gluteus maximus, hamstrings, and quadriceps. Figure 8BA scheme is illustrated for a pressure cuff system 105 integrated into or positioned on a massage chair 810, wherein a muscle group array 200 and a light sensing system 300 are integrated into or mounted on the chair 810 to treat muscle groups of the arms, legs, neck, and / or back. In one embodiment, the muscle group array 200 may be mounted in the massage chair such that the user receives a therapeutic light dose when the massage elements are generating maximum pressure on the target muscle group. Commercially available massage chairs treat neck, shoulder, back, hip, arm, thigh, and calf muscles. The muscle group array 200 and light sensing system 300 may be mounted as a kit in multiple of these locations, wherein the array and sensors interface with a massage chair controller. Alternatively, the light therapy system 100 may be directly incorporated into the design of the massage chair. Alternatively, the light therapy system 100 may be an integral part of other structures such as a massage table.

[0072] In operation, in one scheme, the phototherapy system 100 may employ multiple programs that inflate the pressure cuff system 105 in a desired manner. A target cuff pressure is achieved by inflating the cuff 110 and / or the compartment 405 within the cuff 110 for a specific period of time, or by monitoring the pressure in the tubing connected to the cuff 110. When the maximum cuff pressure is reached, a first solenoid valve (such as a solenoid from one of the pressure gates 145 connecting a pump (such as an electric air pump 130) to the cuff 110) may close, or the pump may stop. A second solenoid valve (such as another solenoid from the pressure gate 130) may vent the cuff 110 or compartment 405 to release pressure according to the programmed schedule. The light emission controller 175 of the photometer 305 may be connected to the pressure controller 125 to monitor and control the voltage corresponding to the state of the solenoid valves, pressure sensor 140, and pump motor. Based on these control signals, the processor within the light emission controller 175 determines when the cuff 110 or each compartment 405 is at maximum pressure. The photometer 305 and the light emitters 165 of the array 200 are operable when they are located below the cuff 110 at a desired and / or predetermined pressure. Both the photometer 305 and the array 200 can be deactivated when the solenoid expels air from the cuff 110 or compartment 405. Typical operating time using the intermittent inflation pressurization system can last approximately 15 minutes. The pump can undergo multiple cycles, each lasting several minutes, in which the cuff 110 or compartment 405 is inflated to a certain pressure and maintained at that pressure for 5 to 30 seconds before expelling the cuff 110 or compartment 405. In one embodiment, the light emission controller 175 may wait until a first predetermined pressure event occurs and obtain readings from the photometer 305 to characterize light absorption and scattering in the skin and fat layer. These measurements can be used to calculate the dose of IR light on the skin surface, which will deliver a uniform dose of IR light to the muscles, where it will be absorbed. The skin dose (DS) can have the form shown below:

[0073] DS = DT * h(skin absorption, fat thickness)

[0074] Among them, the usage time DT is the cumulative time period when the light emitter is activated.

[0075] While the cuff 110 or compartment 405 is still pressurized, the light emitter 165 of the array 200 can be activated to initiate infrared photodose administration. The processor of the light emission controller 175 can record the number of seconds the light emitter of the array 200 is on. Then, when the corresponding cuff solenoid is vented, the light emitter 165 can be turned off, and when the cycle reaches a predetermined pressure and / or duration, the light emitter 165 can be turned back on. When the timer reaches the calculated exposure time for the target dose of the array 200, the lamp can be turned off for the remainder of the programmed schedule.

[0076] In operation, each array 200 of optical emitters 165 comprises a plurality of optical emitters 165 that emit light across a wavelength range spanning a center wavelength. The radiant flux (mW) of each optical emitter is a measure of the amount of light emitted across the effective area on the chip within the wavelength range. The radiant power density of the optical emitter is the radiant flux divided by the effective area (mW / cm²). 2 The radiant power density of the light emitter applies only to the point where the effective area of ​​the light emitter contacts the skin. Surface radiant power density is calculated for each array 200 and for each associated muscle group. Surface radiant power density can be calculated by multiplying the number of light emitters 165 in the group by the radiant flux of the individual light emitter and dividing by the area treated by the group or array 200. Beneath the skin and fat layers, muscle radiant power density is a measure of how much light reaches the underlying muscle layer. The spacing of the light emitters on the muscle group light components of array 200 can be important for proper therapeutic light dose delivery, as too few lamps may create dark areas between the lamps where light does not propagate through to the muscle layer. Each array 200 has spaced-apart light emitters to deliver a nearly uniform power density to the target muscle. The light emitters as a whole can have sufficient radiant power to deliver the dose within the allocated time, wherein the intermittent inflation pressurization procedure keeps the underlying cuff under predetermined pressure.

[0077] For body areas with thicker fat layers, less radiation power reaches the muscle groups. Light reaching the muscles is also more diffused. A more powerful light emitter 165 can be spaced further apart while still achieving the desired uniformity and density of light at the muscle layer. For example, the typical thickness of fat on a male calf (gastrocnemius) is 4mm ± 2mm, while the thickness on the inner thigh (adductor) is 10mm ± 4mm. To achieve uniform 3J / cm² radiation over a 30-second exposure time... 2 The dose of infrared radiation is delivered to two muscle groups. The internal light emitter spacing above the calf muscle group assembly may be 2 cm and use a light emitter with a radiation power of 200 mW, while the light emitter spacing above the adductor muscle may be 5 cm and use a light emitter with a radiation power of 1000 mW.

[0078] In another embodiment, specific focusing and / or diffusing lenses may be placed above the light emitter 165 to help ensure uniform light density on the muscle surface. In this embodiment, the muscle group light emitters of array 200 can be customized for different fat layer thicknesses without changing the light emitter spacing. The muscle group light emitter assembly, movable as array 200, can then target different muscle groups for use in various intermittent pneumatic compression cuff assemblies, such as the hands, feet, arms, legs, hips, thighs, and / or waist. In another embodiment, pressure sensors 330 are mounted on each photometer 305. Array 200 can be activated when pressure above a threshold is sensed above the associated muscle group. Dosage administration can continue when the pressure is above the threshold and the total exposure time is less than the time required to achieve the desired muscle dose. In another embodiment, the light emission controller 175 uses pulse width modulation (PWM) to control the amount of light used. The light emission controller 175 can determine the duty cycle of the light emitter 165 associated with each muscle group, so that the dosage of all muscle groups can be completed simultaneously.

[0079] Modeling the transport of light across multiple tissue layers is a complex problem, which can be addressed using statistical simulations. These simulations model the transport and outcomes of a large number of photons entering the body orthogonally to the skin surface and interacting with multiple tissue layers. The inputs to a Monte Carlo simulation include the optical properties of each tissue layer and their corresponding thickness. The output is a graph showing where photons are absorbed within the tissue or re-emitted from the skin. Figure 9A The diagram summarizes the modeling results for multiple simulations of IR photons (both varying melanin content across skin color from fair to dark and fat thickness across 3 mm to 10 mm). In this simulation, the amount of light absorbed in the muscle layer varied from 17% in fair skin and a 3 mm fat layer to 3.2% in dark skin and a 10 mm fat layer. To achieve the same dose of IR light to the underlying muscle layers, subsequent subjects would need to expose themselves to more than five times the amount of light as the previous subject. Inferring how much light reaches the muscle helps in delivering a consistent dose.

[0080] The model also generates a distribution that shows how light is re-emitted from the skin surface as the distance from the light emitter changes. Figure 9B For points very close to the light source (x < 4 mm, in...) Figure 9B For point A in the equation, diffuse reflectance (R) d (A) = Detector signal / Distance 2 The amount of light not absorbed by melanin in the epidermis is closely related to the amount of light that is absorbed. At a source-detector distance of approximately the thickness of the dermis, the subdermal fat and muscle layers affect the R... d(A) The effect of the signal is negligible. Skin factor F skin It can be defined as R d (4mm), and represents the characteristics of the diffuse reflectance curve.

[0081] Light penetrating the skin layer is scattered in all directions by the fat layer. Some of this light leaves the body through the skin and returns, and can be detected by photodetector 310. Light that passes directly through the fat layer is absorbed by the muscles, where it can provide the desired phototherapy effect. Above a thick fat layer, the amount of light re-emitted at the skin will be greater than above a thin fat layer, where light can propagate from the photometer light emitter 315 to the light-absorbing muscle tissue with less obstruction. The output voltage from the photodetector 310 at different times corresponds to the diffuse reflectance over a certain distance range on the skin surface. The thickness of the fat layer is inferred from multiple measurements of light emitted from the skin 185 and the varying distance from the source. Experiments have shown that at greater distances from the light emitter 315 (>5 mm), R... d (x) exhibits exponential decay, where the decay rate is related to the thickness of the adipose layer. The adipose factor can be simply defined as the ratio R. d (10mm) / R d (20mm), which cancels out the signal components associated with skin absorption.

[0082] For each model simulation, skin factors and adipose factors were tabulated, and the ensemble of models was run using a range of different skin colors and adipose thickness layers, creating a database for inferring the share of light absorbed by muscle tissue, as shown in the tables of the sample database below, to infer the infrared treatment time for delivering a constant dose of infrared light to muscle tissue based on variations in skin color and adipose layer thickness.

[0083]

[0084] Direct measurements by the reflectometer at distances of 4mm, 10mm, and 20mm allow for the calculation of both skin and adipose factors. Conversely, the data in the table above can be used to match and interpolate the measured factors to determine the appropriate treatment time that will deliver a constant dose of infrared light to the muscle tissue of most users.

[0085] In other embodiments, the phototherapy system 100 may use other parameters derived from the diffuse reflectance distribution of a skin reflectometer to infer the adjustment of the treatment time for dose administration. Furthermore, other data, such as the photometer sensor pressure 330, may be added to the database to improve the accuracy of infrared light dose administration.

[0086] The power supply for the components and controller can be integrated into a single housing, and the light source is activated when the IPC pump has reached a predetermined pressure in the cuff 110. In this way, light is emitted only when the optical path from the light source module to the muscle is minimized. The controller can set a specified total infrared or other radiation dose (J or J / cm²) for each muscle group. 2 This allows the muscle group light source to be turned off once the desired dosage has been achieved.

[0087] In one embodiment of the invention, the photosensing system 300 can be used with phototherapy systems other than those using pressure cuff systems. All types of phototherapy can benefit from the measurement of fat layer thickness and the adjustment of light dosage relative to that measurement. For example, the photosensing system 300 can be used to determine the optimal amount of light on the skin to deliver the desired amount of light to muscle tissue in any other mode of infrared phototherapy. Other phototherapy systems include bulbs (Wolezek) and LED panels (i.e., Joovv, PlatinumLED treatment lamps), in which the subject stands in front of the lamp for a predetermined period of time. Other methods may also include tanning bed systems (NovoThor). Furthermore, handheld LEDs and laser IR emitters (Infarex, TOPlight) can be held on the skin surface to achieve therapeutic effects. The optical properties of skin color and fat thickness from clinical test subjects can be approximated and used as input to a multilayer Monte Carlo model. This model will determine what fraction of the IR photons incident on the subject's skin are absorbed in the muscle tissue. By using the relationship between the diffuse reflectance distribution from the output of the IR photometer and the share of light absorbed in the muscle layer (muscle absorption rate) from the table above, the adjustment of the treatment time or light intensity for delivering a certain dose of IR light to the muscle tissue can be calculated.

[0088] The control system 120, including pressure controller 125 and / or light emission controller 175, can be any device capable of receiving input, performing calculations, performing calculations based on input, generating output signals, and / or generating output signals as the result of calculations. Controllers 125 and 175 can be parts of the same controller or separate controllers capable of communicating with each other. Controllers 125 and 175 can take the form of a central processing unit capable of interacting with a user via a keyboard, graphical user interface, wireless communication, voice commands, or any other means. For example, controllers 125 and 175 can be a personal computer, laptop, handheld device, server, network of servers, cloud network, etc. The operator can interact with controllers 125 and / or controller 175 before, during, or after the light therapy procedure. Controllers 125 and 175 may include various modules that allow them to perform calculations, algorithms, routines, and / or subroutines to process information and / or make decisions. Controllers 125 and 175 may also include other optional modules, such as artificial intelligence and / or machine learning modules, which use algorithms to analyze data, learn from the data, and then make decisions and / or predictions based on what they have learned.

[0089] Although the invention has been described in considerable detail with respect to certain preferred embodiments, other embodiments are possible, and variations, substitutions, and equivalents of the illustrated embodiments will become apparent to those skilled in the art upon reading the specification and studying the accompanying drawings. For example, cooperating components may be reversed or provided in additional or fewer quantities. Furthermore, various features of the embodiments described herein can be combined in various ways to provide additional embodiments of the invention. In addition, certain terminology has been used for clarity of description and not for the purpose of limiting the invention. Throughout this specification and any claims appended to it, unless the context otherwise requires, the term "comprising" and its variations such as "including" and "containing" should be understood to imply inclusion of the stated elements, limitations, or steps, but not to exclude any other elements, limitations, or steps. Therefore, any appended claims should not be limited to the description of the preferred embodiments contained herein, but should include all such variations, substitutions, and equivalents falling within the true spirit and scope of the invention.

Claims

1. A light therapy system, comprising: a pressure cuff system comprising a cuff positionable on or near a body part of a user and capable of receiving pressurized air to selectively pressurize and depressurize the cuff; and a light emission system comprising a support structure and a light emitter positioned on the support structure, the light emitter being controllably powerable; wherein the support structure is positionable on an inner surface of the cuff such that the light emitter is capable of directing light onto the body part, and wherein the light emitter has a light emission surface at a sufficient height from the support structure such that the light emission surface is capable of being pressed into skin and a fat layer of the body part when the cuff is pressurized. The light emission surface is at least 3 mm in height.

2. The light therapy system of claim 1, wherein, The light emitter comprises a plurality of light emitter arrays, each of the light emitter arrays being associated with a different muscle group of the body part.

3. The light therapy system of claim 1, wherein, The support structure and the light emitter are on a liner, the liner being removably attachable to the inner surface of the cuff.

4. The light therapy system of claim 1, wherein, The light therapy system further comprises a light meter capable of measuring a characteristic of the body part.

5. The light therapy system of claim 1, wherein, The light therapy system further comprises a light meter positionable on the inner surface of the cuff.

6. The light therapy system of claim 1, wherein, The cuff is an integral part of a chair.

7. The light therapy system of claim 1, wherein, 8. A light therapy system, comprising: a pressure cuff system comprising a cuff positionable on or near a body part of a user and capable of receiving pressurized air to selectively pressurize and depressurize the cuff; a light emission member comprising a support structure and a light emitter positioned on the support structure, wherein the support structure is positionable on an inner surface of the cuff such that the light emitter is capable of directing light onto the body part; and a controller controllably powerable to the light emitter, wherein the controller is capable of adjusting an intensity or duration of light directed onto the body part in response to an input or a measurement related to a state of the body part; wherein the light emitter has a light emission surface at a sufficient height from the support structure such that the light emission surface is capable of being pressed into skin and a fat layer of the body part when the cuff is pressurized. The controller adjusts the intensity or duration of light in response to a thickness of the fat layer of the body part.

9. The light therapy system of claim 8, wherein, The controller adjusts the intensity or duration of light in response to a skin color of the body part.

10. The light therapy system of claim 8, wherein, The light therapy system further comprises a light meter, and wherein the controller adjusts the intensity or duration of light in response to a signal from the light meter.

11. The light therapy system of claim 8, wherein, The light meter is positionable on the inner surface of the cuff.

12. The light therapy system of claim 11, wherein, The light meter generates a signal related to a thickness of the fat layer of the body part or related to a transmissivity of the body part.

13. The light therapy system of claim 11, wherein, The light emitter comprises a plurality of light emitter arrays, each of the light emitter arrays being associated with a different muscle group of the body part.

14. The light therapy system of claim 8, wherein, ​ 15. The light therapy system of claim 8, wherein, The light therapy system further comprises a plurality of photometers, and wherein the controller adjusts the intensity or duration of the light in response to signals from the photometers, wherein the photometers generate signals relating to the thickness of a fat layer of the body part or to the transmissivity of the body part, wherein the light emitter comprises a plurality of light emitter arrays, each of the light emitter arrays being associated with a different muscle group of the body part, and wherein each photometer is positionable on the inner surface of the cuff proximate to a respective array.

16. The light therapy system of claim 8, wherein, The support structure and the light emitter are on a liner that is removably attachable to the inner surface of the cuff.

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