Patent Publication Number: US-2023158327-A1

Title: Phototherapy device

Description:
RELATED APPLICATION 
     This application claims priority to U.S. provisional application 63/282,630, entitled “Phototherapy Device” filed Nov. 23, 2021, the entire contents being incorporated by reference herein. 
    
    
     TECHNICAL FIELD 
     The present disclosure relates to a portable phototherapy device. More specifically, the present disclosure is directed to a portable phototherapy device capable of delivering natural. 
     BACKGROUND 
     A womb contains a lower oxygen environment than a surrounding environment. To adjust to this environment, a fetus will increase the oxygen carrying capacity through an increase in hemoglobin. When infants are born, the oxygen in their environment increases, and the excess hemoglobin is discarded and converted into bilirubin. When bilirubin is first created from heme in hemoglobin, it is considered unconjugated, as it is fat and not water soluble, and binds to albumin to be processed in a liver and excreted in urine and feces. Neurological tissue has a high affinity for unconjugated bilirubin and can cross the blood-brain barrier. Yet, newborn infants do not possess the ability to process bilirubin through their liver, so an excess of unconjugated bilirubin can build up in the babies&#39; system. 
     Typically, an infant with a healthy diet of breast milk can process the bilirubin until the liver is developed enough to process the bilirubin on its own. However, 60% of all term newborns and 80% of premature newborns experience a build-up of bilirubin known as hyperbilirubinemia (jaundice) before the full function of the development of the liver. The use of phototherapy either through artificial or natural sunlight is a known effective treatment to reduce the amount of conjugated bilirubin in the infants&#39; body. Phototherapy is effective because certain wavelengths of light can isomerize the unconjugated bilirubin into conjugated bilirubin (which is water-soluble) through the skin and help the infant pass it through their stool. If the levels of bilirubin in the bloodstream become too high, it can cross the blood-brain barrier and cause Kernicterus, a condition involving deposits of bilirubin in the brain. Kernicterus can cause illness or diseases, such as, cerebral palsy, developmental and intellectual delay, hearing deficiencies, dental dysplasia, and/or oculomotor disturbances. 
     In developing nations, jaundice caused by unconjugated hyperbilirubinemia is still a leading cause of infant mortality and complications. This can be attributed to a lack of electricity to power the phototherapy devices and the risks associated with natural sunlight therapy. While sunlight is readily available, placing newborn infants in sunlight for extended periods of time can risk exposure to skin-damaging UV rays and cause overheating. Additionally, effective natural sunlight phototherapy can be undermined by underexposure due to the fear of overexposure in unprotected sunlight. Ineffective or complete lack of phototherapy allows unconjugated hyperbilirubinemia to progress leading to complications such as kernicterus or even death. 
     Conventional phototherapy treatment of newborns with jaundice may involve placement of the infant in an isolette tank or incubator with direct use of high-powered lighting (e.g., LED lamps), as shown in  FIG.  6 A . However, these devices are not optimal in that they generate undesirable amount of heat, are bulky, obtrusive, and not portable. In addition, these devices are not easily rendered effective as the device requires a power source, and thus, the device cannot be moved around easily, nor portable enough to move (i.e., carry) the device indoor or outside with ease. 
     Other conventional phototherapy devices, as shown in  FIG.  6 B , may involve a blanket having a sheet of fabric material that includes light emitting devices of a wavelength or wavelengths suitable for treatment of jaundice. An infant can lay on the fabric material or the infant can be tightly wrapped in the sheet of fabric material. However, the fabric material directly touches the infant which can be reactive to the skin of the infant and not porous enough for air circulation. Similarly, the blanket also requires a power source, which is not optimal for portability. 
     There remains a need to provide an effective phototherapy device for treating hyperbilirubinemia that is easy to transport around and inexpensive to manufacture. The phototherapy device should not require additional equipment(s), power source, maintenance or training to assemble and to operate, and must be particularly useful in areas of remote access, third world, and developing countries, where specific needs may be required. 
     SUMMARY 
     In an exemplary embodiment, a phototherapy device capable of delivering natural sunlight to a subject is provided. The phototherapy device includes an incubator configured to hold a subject for treatment, a support for supporting the incubator, and an enclosure made from a flexible, transparent material connected to the incubator to create a space therein. The enclosure formed around the incubator allows visible sunlight to enter the enclosure in any direction for treating the subject while partially filtering ultraviolet (UV) and infrared radiation (IR) rays of the visible sunlight. The enclosure includes a first part made from a first material and a second part made from a second material different than the first material. 
     In another exemplary embodiment, a portable phototherapy device capable of delivering natural sunlight to a subject is provided. The portable phototherapy device includes a frame including an upper frame portion and a lower frame portion, and an enclosure including an upper enclosure portion and a lower enclosure portion. The upper frame portion and the lower frame portion include a plurality of rods. The plurality of rods are removable connected to each other. The upper enclosure portion and the lower enclosure portion are made from a flexible, transparent material to filter ultraviolent (UV) and infrared radiation (IR), and the upper enclosure portion can be separable from the lower enclosure portion. The upper frame portion can be framed as a structure to hold the upper enclosure portion and the lower enclosure portion. The lower frame portion can be framed as a structure to hold a bassinet. 
     In another exemplary embodiment, a portable phototherapy device capable of delivering natural sunlight is provided. The portable phototherapy device includes a frame including a first frame member and a second frame member, a support for holding a bassinet, and a flexible, transparent material attached to the first frame member and the second frame member to form an enclosure. The first frame member and the second frame member can be moveable with respect to each other causing the portable phototherapy device to be in a first configuration or in a second configuration. The support is positioned between the first frame member and the second frame member. The flexible, transparent material is configured to filter ultraviolet (UV) and infrared radiation (IR) rays of sunlight. 
     Other features and advantages of the present invention will be apparent from the following more detailed description of the preferred embodiment which illustrates, by way of example, the principles of the invention. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    is a schematic view of a portable phototherapy device, according to an example embodiment of the present disclosure. 
         FIG.  2    is a schematic view of a portable phototherapy device, according to an alternative example embodiment of the present disclosure. 
         FIGS.  3 A and  3 B  are schematic views of a portable phototherapy device, according to an alternate example embodiment of the present disclosure. 
         FIG.  3 C  is a partial view, as indicated by box A of  FIG.  3 A , according to an alternative example embodiment of the present disclosure. 
         FIGS.  4 A and  4 B  are schematic views of a portable phototherapy device, according to an alternate example embodiment of the present disclosure. 
         FIGS.  5 A and  5 B  are schematic views of various configurations of an enclosure, according to example embodiments of the present disclosure. 
         FIGS.  6 A and  6 B  are schematic views of conventional phototherapy devices. 
     
    
    
     It should be noted that these Figures are intended to illustrate the general characteristics of methods, structure and/or materials utilized in certain example embodiments and to supplement the written description provided below. These drawings are not, however, to scale and may not precisely reflect the precise structural or performance characteristics of any given embodiment, and should not be interpreted as defining or limiting the range of values or properties encompassed by example embodiments. For example, the relative thicknesses and positioning of molecules, layers, regions and/or structural elements may be reduced or exaggerated for clarity. The use of similar or identical reference numbers in the various drawings is intended to indicate the presence of a similar or identical element or feature. 
     DETAILED DESCRIPTION 
     A phototherapy device, according to the present disclosure, is a device that is portable requiring no power source for use. The phototherapy device is lightweight, capable of being flattened, folded, rolled, compressed, or otherwise collapsed, to a size smaller than that of its operating size. The phototherapy device does not require special facilities for use; and allows for easy transport and shipment, as well as “in-home” or “field” application. The phototherapy device is not limited or constrained by any power source. The phototherapy device allows for directed and uninterrupted phototherapy without unduly confining or restricting the infant. While being portable, the phototherapy device is adaptable for fitted use over any pre-existing structure, framework, or device (e.g., infant incubator, crib, or bassinet). Unlike wraparound, or garment-type phototherapy devices, the phototherapy device does not come into physical contact with the infant, thus avoiding any physical distress, harm, or discomfort to the infant, and allowing for proper ventilation and circulation. The phototherapy device also allows caregiver access to the infant without having to operate or manipulate any elements on the device. This allows uninterrupted operation of the phototherapy device. The phototherapy device avoids undesirable conditions such as excessive heat and/or dehydration to the infant. 
     The phototherapy device is easy, and inexpensive to manufacture, to transport, and to ship. The phototherapy device requires no special facilities, equipment, power requirements, maintenance or training to assemble and to operate, thus making it particularly useful in areas of remote access, third world, and developing countries, where specific needs may be the greatest. 
     In an exemplary embodiment, a portable phototherapy device capable of delivering natural sunlight to a subject is provided. The portable phototherapy device includes a frame member having an upper frame portion and a lower frame portion and an enclosure having an upper enclosure portion and a lower enclosure portion. The lower frame portion is framed as a structure to hold a bassinet. The upper frame portion is framed as a structure to hold the upper enclosure portion and the lower enclosure portion. Further, the upper frame portion and the lower frame portion include a plurality of rods. The plurality of rods are flexible, semi-rigid to rigid enough to maintain a free-standing configuration. The plurality of rods can be removeable (i.e., disconnected) from each other. This allows for disassembly for easy transport or storage when not in use. Further, the upper enclosure portion can be designed to separate from the lower enclosure portion (i.e., removed with respect to the lower enclosure portion). This feature allows heat to be removed and/or allows a caregiver to handle the infant without disassembling the phototherapy device. 
     In another exemplary embodiment, the portable phototherapy device includes a frame including a first frame member and a second frame member. In this exemplary embodiment, the frame is capable of being flattened, folded, compressed, or otherwise collapsed, to a size that is less than the working space of the assembled and operational phototherapy device. The frame may be composed of poles, rods, tubes, slats, springs, or the like that can articulate, or can otherwise be positioned one to another such that they can be configured (e.g., “assembled”), with an enclosure, to form the structure of the phototherapy device. The frame can be configured (e.g., folded or disassembled) for easy transport or storage when not in use. 
       FIG.  1    is a perspective view of a phototherapy device according to an example embodiment. The phototherapy device  1  includes an incubator  10 , an enclosure  30  covering the incubator  10 , and a bassinet  15  in which an infant  5  is positioned on the bassinet  15 . The phototherapy apparatus  1  receives natural sunlight that shines through a window  50  of a budding structure. In this case, the phototherapy device  1  can be a distance from the window  50  to receive the natural sunlight. For example, the phototherapy device  1  can be as close as a foot from the window  50  to as far as the natural sunlight reaches the phototherapy device  1 . It should be appreciated that any distance may be utilized as long as the natural sunlight reaches the phototherapy device  1  without obtrusion. 
     It should be appreciated that more than one window  50  may be employed to allow sunlight to reach the phototherapy device  1  in optimal application. This allows greater coverage that the sunlight has reached the phototherapy device  1 . For example, the phototherapy device  1  can be next to a wall of a budding where the entire wall is made up of windows. 
     The incubator  10  can be provided (e.g., attached, mounted) on a base  20  that is supported on casters  25  (i.e., wheels). The use of wheels permits the phototherapy device  1  to be a movable base  20 , and further allows the phototherapy apparatus  1  to be used with various incubators, cribs, and other infant supporting devices, including various therapy platforms. In other uses, the incubator  10 , via the wheels, can be transported closer to the window  50  or in occasion, can be transported outdoor to receive the natural sunlight. 
     The enclosure  30  is attached to the incubator  10 . That is, the enclosure  30  covers the incubator  10 . In other words, the enclosure  30  forms a bubble creating a space between the incubator  10  and the enclosure  30  and permits the infant  5  to lie inside of the space. The enclosure  30  wraps entirely (e.g., formed 360° around the incubator  10 . This allows sunlight to reach and enter the enclosure  30  in any or all directions for optimal light phototherapy. To describe in a different manner, due to the formed shaped of the enclosure  30 , surface area of light exposure to the infant  5  is increased. In some implementations, a frame (not shown) may be coupled to an upper portion of the incubator  10  to form a structure such that the enclosure  30  encloses the frame and a portion of the incubator  10 . The frame ensures the shape of the enclosure  30  attached to the incubator  10 . In some implementations, the enclosure  30  may include fastening means to attach the enclosure  30  to the incubator  10 . For example, the fastening means can be, but not limited to, zippers, buttons, hook-and-loop fasteners, adhesives, and/or tape. In some implementations, the fastening means can be provided on an outer surface of the incubator  10  such that the enclosure  30  is attached to the incubator  10 . For example, there may be fastening means on all four sides of the incubator  10  to ensure a secure attachment. 
     The enclosure  30  can be made from many materials of various kinds of plastic or polyethylene sheet that is flexible and transparent. The flexible, transparent material filters ultraviolent (UV) and infrared radiation (IR) and constructed to prevent overexposure to the skin of the infant  5 . Ordinarily, sunlight is broken down into three major components: (1) visible light, with wavelengths between 400 nanometers (nm) to 700 nanometers (nm), (2) ultraviolet light, with wavelengths shorter than 400 nm, and (3) infrared radiation, with wavelengths longer than 700 nm. To avoid the harmful components of sunlight, the enclosure  30  should receive only the visible light having the wavelengths between 400 nm to 700 nm to transmit the efficacy of monochromatic visible light to the infant  5 . The optimal light wavelength range for jaundice treatment is in the blue light spectrum from about 380 nm to 470 nm. In that range, the orange to red bilirubin is able to absorb the maximum amount of light and break down the bilirubin into a form that the body can get rid of through urine and stool. The filtered enclosure  30  helps maintain the infant&#39;s unconjugated bilirubin levels from exceeding 20 mg/dL. 
     In some implementations, the flexible material of the filtered enclosure  30  has properties that is resistant to (enable to withstand) prevent cuts, tears, rips to the flexible material. For example, the flexible material of the filtered enclosure  30  can be made from, but not limited to, polyethylene, polypropylene, and/or polyvinyl chloride. 
     In some implementations, the flexible material of the filtered enclosure  30  has properties to prevent scratches on a surface of the flexible material, i.e., anti-scratching properties. For example, the anti-scratching properties can be embodied in the flexible material. In another example, the anti-scratching properties can be a coating or layer on an outer surface of the flexible material. The coating can be laminated or laminated together to form the flexible material. 
     In some implementations, the flexible material of the filtered enclosure  30  has properties to be deformable. That is, the flexible material is formed of a plastically deformable material that is flexible enough to be deformed to a desired configuration by hand while also having sufficient shape memory to retain the configuration to which it has been deformed during subsequent use of the device for delivery of a light therapy session. 
     The bassinet  15  includes a sheet to hold the infant  5  inside the incubator  10  or placed atop the sheet. The sheet is made from a material in which the material touching the skin of the infant is non-reactive and porous for air circulation, i.e., breathability. In some implementations, the sheet can be made from cloth, a mesh cloth or variation thereof. In one exemplary implementation, the sheet is a mesh pillow case-type doth. The mesh helps to allow air to pass to/from outside of the incubator  10  to the infant  5  (e.g., to expose the back of the infant). It should be appreciated that the cloth cover is not limited to mesh. 
     In some implementations, a pad  7  (e.g., a floatable mattress) is placed below the sheet to provide cushion to the infant  5 , as shown in  FIG.  2   . In other words, the mattress pad  7  is a comfortable pad on which the infant  5  is placed. In some implementations, the sheet can be wrapped over the pad  7 . That is, the pad  7  is placed between two sheets to form a pillow-like case. 
     In some implementations, the pad  7  includes a heating element (not shown) to heat the pad  7  before the infant  5  is placed in the incubator  10 . The heated pad acts as a warming pad. The heating element can be a wired heating element that is disposed within the pad  7 . In other implementations, the heating element can be placed below the pad  7 . It should be appreciated the heating element must be connected to a power source and can only be available if plugged in. 
     In some implementations, the phototherapy device  1  includes a ventilation system  60  to vent or force air out of the incubator  10 . That is, the ventilation system  60  helps remove air trapped in the enclosure  30  and eventually expelled out through the incubator  10 . This prevents any overheating of the infant  5 . For example, the ventilation system  60  ensures that the infant  5  does not exceed 100.4° F. In some implementations, the ventilation system  60  is located directly below the incubator  10 . In some implementations, the ventilation system  60  can include ports to suction out the air inside the enclosure  30 . The ports can be directly attached to the pad  7  to ensure sufficient expelled force is required to penetrate through the pad  7  and/or sheet. 
     Referring to  FIG.  2   , the phototherapy device  1  includes a reflective member  9  to reflect overexposure of sunlight. The reflective member  9  can be made from a material that is reflective to sunlight. For example, the reflective member  9  can be made from a metal material, such as, but not limited to, copper, silver, and/or aluminum. In another example, the reflective member  9  can be made from non-metal materials. The reflective member  9  can be located at the sides of the incubator  10  where the infant  5  rests on top of the pad  7  protecting the infant  5 . In other words, the infant  5  is receiving sunlight from a top direction and not from a sideward direction. 
       FIGS.  3 A and  3 B  are perspective views of a portable phototherapy device  2  according to another example embodiment.  FIG.  3 A  is a perspective view when a user looking in a perpendicular direction at the portable phototherapy device  2 .  FIG.  3 B  is a perspective view when a user looking at an angle at the phototherapy device  2 . 
     The phototherapy device  2  includes a frame structure  40  having an upper frame portion  40   a  and a lower frame portion  40   b  and an enclosure  30  having an upper enclosure portion  30   a  and a lower enclosure portion  30   b . The lower frame portion  40   b  is framed as a structure to hold the bassinet  15 . In one implementation, the lower frame portion  40   b  is formed as a shape of a rectangle. The upper frame portion  40   a  is framed as a structure to hold (e.g., encompass, wrap) the upper enclosure portion  30   a  and the lower enclosure portion  30   b . In one implementation, the upper frame portion  40   a  is formed as a shape of a pyramid. R should be appreciated that other shapes can be implemented as long as the upper frame portion  40   a  and the lower frame portion  40   b  are structured to hold the bassinet  15  and enclosure  30 , respectively. Further, the frame structure  40  is not limited in its composition, size or shape, but has a structure to support the phototherapy device  2  in a “free-standing” configuration. 
     As similarly described in  FIG.  1   , the upper enclosure portion  30   a  and the lower enclosure portion  30   b  are made from a flexible, transparent material to filter ultraviolent (UV) and infrared radiation (IR) and prevent overexposure to the infant  5 . Because the compositions or properties of the flexible transparent materials are similar, further details will not be discussed herein. 
     In some implementations, the upper enclosure portion  30   a  and the lower enclosure portion  30   b  are made from the same material. In other implementations, the upper enclosure portion  30   a  and the lower enclosure portion  30   b  are made from different materials. For example, the upper enclosure portion  30   a  can be made from a material that can receive the natural sunlight and filter UV and IR while the lower enclosure portion  30   b  can be made with a material that filters out the entire (i.e., reflects) sunlight. In some implementations, the upper enclosure portion  30   a  and the lower enclosure portion  30   b  have properties to be deformable. That is, the flexible material is formed of a plastically deformable material that is flexible enough to be deformed to a desired configuration by hand while also having sufficient shape memory to retain the configuration to which it has been deformed during subsequent use of the device for delivery of a light therapy session. 
     In some implementations, the upper enclosure portion  30   a  can be designed to separate from the lower enclosure portion  30   b . In other words, the upper enclosure portion  30   a  can be removed with respect to the lower enclosure portion  30   b . This feature allows heat to be removed and/or allows a caregiver to handle the infant  5  without disassembling the phototherapy device  2 . In other words, the removed upper enclosure portion  30   a  allows the caregiver to reach inside of phototherapy device  2  and handle the infant  5 . 
     The upper frame portion  40   a  and the lower frame portion  40   b  comprise a plurality of flexible rods  42  to form the structures of the upper frame portion  40   a  and the lower frame portion  40   b . The plurality of rods  42  should be flexible, semi-rigid to rigid enough to maintain a free-standing configuration. Additionally, the plurality of rods  42  should be sturdy enough to hold the weight of the infant  5 . In some implementations, the plurality of rods  42  are hollow rods made from plastic materials that is deformable and easy to cut to suitable lengths for any particular shape or design. For example, the plurality of rods  42  are non-conductive, extruded fiberglass rods having ¼ inch or ⅜ inch diameter. 
     As shown in  FIG.  3 C , the plurality of flexible rods  42  are used to form the structure of the lower frame portion  40   b  and assembled together via a connector  44 . In other words, the connector  44  is used to form corners of the lower frame portion  40   b  (and the upper frame portion  40   a ). In some implementations, the connector  44  can be used to connect two flexible rods  42  to form a straight line to extend a length of the connected flexible rods  42 . The connector  44  can be made from the same material as the plurality of rods  42 , but has a slightly larger diameter to fit the plurality of rods  42  together. In other words, the connector  44  has a female fitting to connect the plurality of rods  42  having a male fitting. This provides each of the plurality of rods  42  and the connector  44  to be removable (i.e., disconnected) from each other. Because the plurality of rods  42  and connector  44  can be disconnected from each other, the phototherapy device  2 , according to the present disclosure, can be disassembled for easy transport or storage when not in use. 
     In some implementations, as shown in  FIG.  3 C , a corner of the lower frame portion  40   b  is formed by a three-way connector  44  to connect the plurality of rods  42  together. 
     In some implementations, the plurality of rods  42  can be permanently connected to the connector  44 . For example, adhesive, such as glue may be applied on an inner surface of the connector  44  to permanently connected the rods  42  to the connector  44 . In other implementations, glue may be used to sufficiently hold the pieces (e.g., rods  42  and/or connector  44 ) together to provide a tight secure fit, rather than a permanent hold. 
     Similarly, the upper frame portion  40   a  can be formed using the plurality of rods  42  to form the structure of the upper frame portion  40   a . Same pieces (e.g., rods  42  and/or connector  44 ) of the lower frame portion  40   b  can be used to form the upper frame portion  40   a.    
     In some implementations, the upper frame portion  40   a  and the lower frame portion  40   b  can be formed in a unitary manner. In other words, the upper frame portion  40   a  and the lower frame portion  40   b  can be constructed as one-piece members. 
     The phototherapy device  2  can include a sensor  70 . In some implementations, the sensor  70  can measure temperature inside of the phototherapy device  2 . If a certain temperature is reached, an indication to alert the caregiver that the inside of the phototherapy device  2  is too warm is sent. In other implementations, the sensor  70  may send a signal to operate a ventilation unit (now shown) to either force air into the phototherapy device  2  or expel air out of the phototherapy device  2 . In other implementations, the sensor  70  can measure humidity (or moisture) inside of the phototherapy device  2 . Similarly, if a certain moisture is read, an alert to the caregiver is given and/or to operate the ventilation unit. In some implementations, the sensor  70  can measure vitals of the infant  5 . For example, vitals include, but not limited to, temperature, blood pressure, heart rate, and respiratory rate. In some implementations, the sensor  70  can be a light measuring instrument. For example, the sensor  70  can measure an intensity of a radiation of the visible light via a filter configured to read transmission spectrum of the light. It should be appreciated that the sensor  70  can determine as one or a combination of the above mentioned operations. 
     In one implementation, the sensor  70  is located near the top of the phototherapy device  2 . More specifically, the sensor  70  is located on top of the upper enclosure portion  30   a . In other implementations, the sensor  70  can be located at other locations. For example, the sensor  70  can be located at any location in the lower enclosure portion  30   b  and/or on the bassinet  15 . 
       FIGS.  4 A and  4 B  are schematic views of a phototherapy device  3  according to another example embodiment.  FIG.  4 A  illustrates the phototherapy device  3  in a used (i.e., uncollapsed, unfolded) arrangement.  FIG.  4 B  illustrates the phototherapy device  3  in an unused (i.e., collapsed, folded) arrangement. In this condition of  FIG.  4 B , the phototherapy device  3  can be easily transportable (i.e., portable) and easily stored when not in use. 
     The phototherapy device  3  includes a frame  53  and a bassinet holder  56 . The frame  53  is designed to hold the bassinet holder  56  and the enclosure  30  (not shown). The frame  53  includes a first frame member  53   a  and a second frame member  53   b . The frame  53  can be made from similar materials as the rods  42  described in  FIGS.  3 A and  3 B , and thus, not discussed further in detail. The bassinet holder  56  is made from a plastic material and designed to hold the bassinet  15 . For example, a mesh sheet is formed over (i.e., wraps) the bassinet holder  56  to form an area where the infant  5  can lay or rest. The frame  53  is configured to hold the bassinet holder  56 . 
     To maintain the portable feature of the phototherapy device  3 , the frame  53  is capable of being flattened, folded, compressed, or otherwise collapsed, to a size that is less than the working space of the assembled and operational phototherapy device  3  (as shown in  FIG.  4 A ). For instance, as shown in  FIG.  4 B , the first frame member  53   a  and the second frame member  53   b  are “disassembled” such that the first frame member  53   a  and the second frame member  53   b  are closer to each other. In this configuration (e.g., folded or collapsed), the phototherapy device  3  can be easily transported or stored when not in use. 
     In some implementations, the frame  53  may be composed of poles, rods, tubes, slats, springs, or the like that can articulate, or can otherwise be positioned one to another such that they can be configured to be “assembled” ( FIG.  4 A ) or configured to be “disassembled” ( FIG.  4 B ). For example, a pin  64  is used to connect the first frame member  53   a  and the second frame member  53   b  together. The pin  64  acts as joint to move (i.e., rotate) the first frame member  53   a  and the second frame member  53   b . When force is applied (e.g., downwardly), the first frame member  53   a  and the second frame member  53   b  collapse to bring the members together. In some implementations, a spring (not shown) can be used to create an articulation of the first frame member  53   a  and the second frame member  53   b . That is, the spring can apply force to one or both of the first frame member  53   a  and/or the second frame member  53   b  to force the first frame member  53   a  and/or the second frame member  53   b  in an upwardly direction (i.e., assembled position or in use operation). 
     Referring to  FIG.  5 A , in some implementations, the enclosure  30  can be built in a substantially circular shaped, i.e., domed. The shape of the enclosure can filter harmful IR and UV rays from entering within the enclosure  30  from the direction of the sun such that the subject  5  would be protected therein. In some implementations, a breathable material  6  can rest on top of the bassinet  5  to allow airflow therethrough within the enclosure  30 . However, on some occasions, the sun isn&#39;t the only source of IR heat. For instance, IR heat may enter into the device from underneath cast off from a hot ground it was sitting on. Because the protective enclosure  30  can sometimes act as a mirror on both sides to UV and IR rays, it may on occasion trap heat radiating from the hot ground. Therefore, one solution to this is to design a device such that IR rays outside the device cannot get in but IR rays inside the device can get out, such that there is no build-up of heat. The temperature therefore should be equal to the ambient temperature of the air. As shown in  FIG.  5 B , the enclosure  30  is non-symmetrically formed. In other words, the enclosure  30  is not in a domed-like shape as compared to the device shown in  FIG.  5 A . In one implementation, the enclosure  30  is triangularly shaped, for example. By changing the shape of the ‘dome’ to an angled shaped relative to the bassinet  15 , harmful IR and UV rays can be filtered out. In some implementations, the enclosure  30  may include a first part  31   a  and a second part  31   b . In one implementation, the second part  31   b  is vertically formed and the first part  31   a  is at an angle (e.g., 45°) with respect to the second part  31   b . In some implementations, the second part  31   b  has a different material than the first part  31   a . For example, the first part  31   a  can be made from a polyethylene material and the second part  31   b  can be made from a polyethylene material including a reflective material. By having the material of the vertical formed second part  31   b  to only block UV rays, every incident ray of IR that generates underneath the enclosure  30  will eventually find its way out of the device after no more than a few bounces. This also keeps IR and UV rays from entering from outside the device as long as the entire device is facing the equator. As such, little to no UV rays are expected to be generated by the ground underneath the device. So, therefore, trapping UV is no longer a concern. This creates a system in which ambient heat cannot build up inside the device while allowing light to enter the device which are non-harmful, useful for conjugating bilirubin and treating jaundice. In some implementations, IR rays can still enter from the back panel, however, the average ambient IR rays generation from outside objects such as trees and rocks is negligible. 
     EMBODIMENTS 
     A. A portable phototherapy device, comprising an incubator configured to hold a subject for treatment; a support for supporting the incubator, the support including one or more wheels to transport the portable phototherapy device; and an enclosure made from a flexible, transparent material connected to the incubator to create a space therein. The enclosure formed around the incubator allows visible sunlight to enter the enclosure in any direction for treating the subject while partially filtering ultraviolet (UV) and infrared radiation (IR) rays of the visible sunlight. The enclosure includes a first part made from a first material and a second part made from a second material different than the first material. 
     B. The device of claim A, wherein the enclosure is non-symmetrically shaped with respect to the incubator. 
     C. The device of claim A, wherein the enclosure is shaped as a triangle. 
     D. The device of claim A, wherein the first part is at an angle with respect to the second part. 
     E. The device of claim A, wherein the angle is at least 45°. 
     F. The device of claim A, wherein the flexible, transparent material is a polyethylene material. 
     G. The device of claim A, wherein the visible sunlight having wavelengths between 400 nm to 700 nm for treatment of the subject. 
     H. The device of claim D, wherein the visible sunlight having wavelengths between 380 nm to 470 nm for treatment of the subject. 
     I. The device of claim A, wherein the flexible, transparent material is attached to the incubator by a fastener. 
     J. The device of claim F, wherein the fastener is at least one of a zipper, a button, a hook-and-loop fastener, an adhesive, or a tape. 
     K. The device of claim A, further comprising a reflective material placed on at least one of the incubator or the flexible, transparent material. 
     L. The device of claim A, further comprising a ventilation system to expel air out of the incubator. 
     M. The device of claim A, wherein the ventilation system includes at least one port to suction out the air inside of the enclosure. 
     N. The device of claim A, wherein a pad is attached to the incubator for placing the subject thereon, wherein at least one port is attached to the pad for cooling the subject. 
     O. A portable phototherapy device, comprising: a frame including an upper frame portion and a lower frame portion, the upper frame portion and the lower frame portion include a plurality of rods, the plurality of rods being removable connected to each other; and an enclosure including an upper enclosure portion and a lower enclosure portion, the upper enclosure portion and the lower enclosure portion enclosed by a flexible, transparent material to filter ultraviolent (UV) and infrared radiation (IR), and the upper enclosure portion being separable from the lower enclosure portion, wherein the upper frame portion is framed as a structure to hold the upper enclosure portion and the lower enclosure portion, and wherein the lower frame portion is framed as a structure to hold a bassinet. 
     P. The device of claim L, wherein the upper enclosure portion is separable from the lower enclosure portion. 
     Q. The device of claim L, wherein each of the plurality of rods is a non-conductive, extruded fiberglass rod. 
     R. A portable phototherapy device, comprising: a frame including a first frame member and a second frame member, the first frame member and the second frame member being moveable with respect to each other causing the portable phototherapy device to be in a first configuration or in a second configuration; a support for holding a bassinet, the support positioned between the first frame member and the second frame member; and a flexible, transparent material attached to the first frame member and the second frame member to form an enclosure, the flexible, transparent material configured to filter ultraviolet (UV) and infrared radiation (IR) rays of sunlight. 
     S. The portable phototherapy device according to claim R, wherein: in the first configuration, the first frame member and the second frame member are closer to each other so as to be in a disassembled state, and in the second configuration, the first frame member and the second frame member are farther from each other so as to be in an assembled state. 
     T. The device of claim R, wherein a portion of the first frame member crosses a portion of the second frame member to pivot at a fixed point. 
     The articles “a” and “an,” as used herein, mean one or more when applied to any feature in embodiments of the present disclosure described in the specification and claims. The use of “a” and “an” does not limit the meaning to a single feature unless such a limit is specifically stated. The article “the” preceding singular or plural nouns or noun phrases denotes a particular specified feature or particular specified features and may have a singular or plural connotation depending upon the context in which it is used. The adjective “any” means one, some, or all indiscriminately of whatever quantity. 
     “At least one,” as used herein, means one or more and thus includes individual components as well as mixtures/combinations. 
     The transitional terms “comprising”, “consisting essentially of” and “consisting of”, when used in the appended claims, in original and amended form, define the claim scope with respect to what unrecited additional claim elements or steps, if any, are excluded from the scope of the claim(s). The term “comprising” is intended to be inclusive or open-ended and does not exclude any additional, unrecited element, method, step or material. The term “consisting of” excludes any element, step or material other than those specified in the claim and, in the latter instance, impurities ordinarily associated with the specified material(s). The term “consisting essentially of” limits the scope of a claim to the specified elements, steps or material(s) and those that do not materially affect the basic and novel characteristic(s) of the claimed disclosure. All materials and methods described herein that embody the present disclosure can, in alternate embodiments, be more specifically defined by any of the transitional terms “comprising,” “consisting essentially of,” and “consisting of.” 
     Although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of example embodiments. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items. 
     It will be understood that, if an element is referred to as being “connected” or “coupled” to another element, it can be directly connected, or coupled, to the other element or intervening elements may be present. In contrast, if an element is referred to as being “directly connected” or “directly coupled” to another element, there are no intervening elements present. Other words used to describe the relationship between elements should be interpreted in a like fashion (e.g., “between” versus “directly between,” “adjacent” versus “directly adjacent,” etc.). 
     Spatially relative terms (e.g., “beneath,” “below,” “lower,” “above,” “upper” and the like) may be used herein for ease of description to describe one element or a relationship between a feature and another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as “below” or “beneath” other elements or features would then be oriented “above” the other elements or features. Thus, for example, the term “below” can encompass both an orientation that is above, as well as, below. The device may be otherwise oriented (rotated 90 degrees or viewed or referenced at other orientations) and the spatially relative descriptors used herein should be interpreted accordingly. 
     Example embodiments are described herein with reference to cross-sectional illustrations that are schematic illustrations of idealized embodiments (and intermediate structures). As such, variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, may be expected. Thus, example embodiments should not be construed as limited to the particular shapes of regions illustrated herein but may include deviations in shapes that result, for example, from manufacturing. 
     Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which example embodiments belong. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein. 
     While the disclosure has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the disclosure. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the disclosure without departing from the essential scope thereof. While various aspects and embodiments have been disclosed herein, other aspects and embodiments will be apparent to those skilled in the art. The various aspects and embodiments disclosed herein are for purposes of illustration and are not intended to be limiting, with the true scope and spirit being indicated by the following claims.