Patent Grant
11801203
This disclosure is related to the field of devices and methods for providing intermittent flow in a vessel, particularly intermittent flow in a baby bottle to assist in teaching preterm infants to successfully eat.
The average gestation period of a human being is generally considered to be 280 days, or around 40 weeks. Recent science has indicated that birth, without any medical intervention or complications of preterm birth, will, on average, occur at a little over 38 weeks after fertilization. Generally, an infant born from 37-42 weeks after conception is considered to be “full term.” A large number of babies, however, are born prior to this period. In the United States around 12% of babies born each year are considered to be “preterm,” that is, before the 37th week. Some of these births occur spontaneously, some occur due to complications in pregnancy, others are scheduled early due to the need for planned Cesarean section births, some are due induced labor following abnormal lab results, and others from concern that an infant is getting too large to be easily delivered.
Regardless of the reason that an infant is born preterm, preterm infants (and even those born in the 38th and 39th week compared to those born later) generally have more medical issues at birth than full term infants. For example, infant mortality rates for preterm infants are generally double those of full term infants. Another problem associated with preterm babies is that they have trouble learning how to eat. The act of nursing (or alternatively eating from a bottle) generally requires an infant to follow a pattern usually referred to as “suck-swallow-breathe.” In this pattern, an infant sucks once, swallows once, breathes once, and then repeats. Preterm infants, however, may feed with repetitions of 3 or 4 (or more) sucks and swallows and 1 breathing break. However, many preterm infants have trouble maintaining any pattern and an inability to feed can lead to further complications with the infant; this can result in increased medical expense because of the need to keep them at a hospital.
Because many preterm infants (and particularly very early preterm infants) are maintained in a Neonatal Intensive Care Unit (NICU), they are often bottle fed (breastfeeding is a challenge) and effective feeding patterns must be imposed until the central nervous system matures to enable coordination of the suck-swallow-breathe pattern. While preterm infants often demonstrate adequate suction and compression on the bottle to express milk very early in gestation, the immature central nervous system does not signal the infant to pause for respiration, which results in inadequate oxygen in the blood and dangerous drops in heart rate. In the months prior to term equivalent age, cautious caregivers can promote an imposed breathing break by allowing the infant to take a few sucks from the bottle followed by pulling the bottle out of the infant's mouth. This procedure requires special expertise and considerable time, causes the infant significant energy expenditure and physiological stress, and disrupts the feeding process. The complexities of feeding infants delay discharge and increase hospital costs. NICU nurses and therapists currently manually pace preterm infants during bottle feeding, and parents are often taught how to pace preterm infants during oral feeds. It has been found that many preterm infants will continue sucking until prompted to swallow and breathe by the feeder. During feeding, monitors attached to the infants in the NICU collect data regarding respiration, heart rate and other vital signs to assist the nurse in knowing when to prompt the infant to swallow and breathe. However, these monitors often take longer to alert a nurse than desired. This requires the nurse to analyze the infant's facial features for signs of stress, such as raised eyebrows, breathing difficulty, or blue discoloration.
When the NICU nurse detects that the infant needs to breathe, the nurse tilts or, if necessary, completely removes the bottle to stop the flow of liquid from the bottle. This cues the infant to swallow and begin breathing again. This system is highly subjective to human intervention and requires constant attention during feeding to minimize the possibility of risks such as choking or aspiration. Many infants will eventually pick up the rhythm of suck-swallow-breathe after only a few repetitions, and it is desirable for infants that quickly pick up the pattern to begin pacing naturally as that allows them to maintain their own pattern and maintain their own pace while maximizing the amount of intake. Removing or maneuvering the bottle can often cause problems with the infant establishing a pattern, gaining an adequate swallow on fluid that has been expressed, and/or re-establishing the feeding response. Therefore it is desirable to provide a more simplified solution for establishing an eating pattern.
The following is a summary of the invention which should provide to the reader a basic understanding of some aspects of the invention. This summary is not intended to identify critical components of the invention, nor in any way to delineate the scope of the invention. The sole purpose of this summary is to present in simplified language some aspects of the invention as a prelude to the more detailed description presented below.
Because of these and other problems in the art, it is desirable to provide a feeding device that eliminates the need to constantly monitor a feeding in a preterm infant and manually alter the flow of liquid in a bottle.
There is described herein, among other things, a baby bottle for providing paced feeding, the bottle comprising: a storage chamber, containing a first amount of fluid; a feeding reservoir, containing a second amount of the fluid smaller than the first amount, the feeding reservoir in fluid communication with the storage chamber; a nipple in fluid communication with the feeding reservoir; and a pump for moving fluid from storage chamber to the feeding reservoir; wherein when an infant sucks on the nipple, they can only obtain the second amount of the fluid at predetermined periods of time or until they cease sucking at which point the pump will feed the second amount of fluid from the storage chamber to the feeding reservoir.
In an embodiment of the bottle, when the infant ceases sucking, the infant breathes and the infant's breath is detected by an electronic sensor.
In an embodiment of the bottle, the electronic sensor instructs a computer to activate the pump upon the breath being detected.
In an embodiment of the bottle, when the infant ceases sucking, a change in pressure is detected by an electronic sensor.
In an embodiment of the bottle, the electronic sensor instructs a computer to activate the pump upon the change being detected.
In an embodiment of the bottle, the pump is a peristaltic pump.
In an embodiment of the bottle, the feeding reservoir and the storage chamber are connected by a tube.
In an embodiment of the bottle, the feeding reservoir, storage chamber, and tube are removable from the bottle as a unit.
In an embodiment of the bottle, the storage chamber is a rigid bottle.
In an embodiment of the bottle, the storage chamber is a flexible bag.
In an embodiment of the bottle, the storage chamber, feeding reservoir, and pump are housed in a single structure.
In an embodiment of the bottle, the single structure comprises a body attached to the nipple.
In an embodiment of the bottle, the body opens in the form of a clamshell.
In an embodiment of the bottle, the feeding chamber comprises a portion of an interior volume of a tube connected to the storage chamber.
In an embodiment of the bottle, the feeding chamber consists of a portion of an interior volume of a tube connected to the storage chamber.
In an embodiment of the bottle, the infant fed by the bottle is a preterm infant or other infant with the need for slow, paced, or intermittent flow feedings.
There is also described herein a baby bottle for providing paced feeding, the bottle comprising: a storage chamber, containing a first amount of fluid; a tube in fluid communication with the storage chamber; a peristaltic pump connected to the tube to move fluid from the storage chamber to a portion of the tube forward of the pump, the portion of the tube forward of the pump comprising a feeding reservoir internal thereto; a nipple comprising a teat having a hole, the feeding reservoir being in direct fluid contact with the hole.
The following detailed description and disclosure illustrates by way of example and not by way of limitation. This description will clearly enable one skilled in the art to make and use the disclosed systems and apparatus, and describes several embodiments, adaptations, variations, alternatives and uses of the disclosed systems and apparatus. As various changes could be made in the above constructions without departing from the scope of the disclosures, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.
A normal NICU feeding bottle contains about 30-90 milliliters of solution in a generally cylindrical bottle (100) as shown in
Further, because of its use in both a hospital and home setting, while in an embodiment the device may be disposable and single use, the device can preferably be provided sterile, be re-sterilizable, and is ideally easily washable, preferably in a standard dishwasher.
The nipple will generally include at least one hole at its distal end (117) through which the fluid can pass. For very young infants, the hole is usually sufficiently small that the surface tension of the fluid will not allow it to pass through without pressure being applied. An infant is fed by placing the nipple (107) in their mouth. They will generally instinctually suck on the nipple (107) pulling the fluid through the hole and into their mouth. For an infant that has suck-swallow-breathe activity, once the infant has sufficient fluid in their mouth, they will cease sucking on the nipple (107) and swallow. They will then breathe, which may relax the pressure generated in the nipple (107).
In the embodiment of
The pacing valve (105) of
In operation, the turbine (201) rotates through a controlled arc and includes openings (601) which are either aligned, or misaligned, with openings (401) in the base (205). When the two sets of openings (401) and (601) are aligned (open state), fluid can flow from the main body (101), through the base (205), through the turbine (201) and into the nipple (107). When the openings (401) and (601) are misaligned (closed state), fluid is restrained at the pacing valve (105) and cannot enter the nipple (107). The turbine (201) alternates between open and closed states with the base due to the fluid flow induced by the infant sucking on the nipple (107) and spring dynamics. The closed state stops flow to allow the infant to swallow and breathe. The open state allows fluid to flow into the nipple for the infant to feed.
An elongated rod (403) protrudes from generally the center of one side of the platform (411) and is arranged towards the distal end (117) of the nipple (107). The distal end of the rod (403) terminates in a ball (405). This ball (405) comprises half of a ball and socket joint with the joint (605) being located on the turbine (201). This arrangement allows the turbine (201) to rotate about the axis of the rod (403). A hollow slot (413) runs through the diameter of the rod (403). The slot (413) will be used to allow for the spring (203) to be attached and rigidly held in position relative to the rod (403). To limit the rotation of the turbine (201) to a fixed arc, a second elongated rod (407) projects out of the same side of the platform (411) as the elongated rod (403). This second rod (407) is positioned nearer the edge of the platform (411) and will slide into a track (607) in the turbine (201) to limit the rotation of the turbine (201) about the rod (403) to a fixed distance.
An embodiment of the spring (203) is shown in
The spring (203) connects to the base (205) as is best shown in
In the preferred manner of operation, the turbine would rotate so as to move the leg (523) in the counter-clockwise direction as seen in
The turbine may be generally solid with pathways therethrough or may be generally hollow. Regardless, an outer perimeter wall (643) of the turbine (201) encases the turbine blades (621) and fits within the nipple (107). The perimeter wall connects a bottom faceplate (645) and a top faceplate (647). This can be best seen in the exploded view of the parts in
It should be noted that the ball (405) and socket (605) attachment should have minimal friction so that the turbine (201) can rotate as freely as possible about the rod (403). Further, although the ball (405) and socket (605) joints allow for larger ranges of motion than may be desired, the turbine (201) will be limited to circumferential rotation by the connection to the spring (203). This type of attachment also allows for easy assembly and disassembly, such as for cleaning.
There is a track (607) which cuts through the bottom face plate (645) towards the outer perimeter (643). This track (607) houses the second rod (407) on the platform (411) and restricts the turbine (201) to about 120 degree maximum rotation. This track (607) preferably aligns with one set of open turbine blades as described below. In this way, the turbine is inhibited from movement that would allow more than one opening (601) to align with any particular opening (401). The track (607) is best seen in
The outer perimeter ring (643) secures the tip of the internal turbine blades (621). Each blade (621) is set at an angle relative to the bottom faceplate (645) and the top faceplate (647). This angle may be any angle known to one of ordinary skill but is preferably between 30 and 60 degrees relative to the bottom faceplate (645), more preferably around 45 degrees and even more preferably about 47 degrees. Each blade (621) is preferably equally spaced around the turbine and rotates about the axis at about 30°. Each blade (621) will connect one of the holes (611B) with one of the holes (611A) effectively forming an angled channel through the turbine (201), which is referred to as hole (601). In addition, there may be positioned additional turbine blades (621) insides the structure of the main body (641) to reduce the weight of the turbine (201).
In an embodiment, nine turbine blades (621) are used with six of the turbine blades (621) being internal to the main body (641) and not allowing flow into the turbine (201). Two such closed turbine blades (621) are placed between each open turbine blade (621). This is the main mechanism to restrict fluid flow through the pacing valve (105) as fluid can only flow through the channels/holes (601). Finally, there is a hollow cylinder (635) surrounding the center axis of the turbine (201) and located as a hub for the turbine blades (621). This cylinder extends from the bottom faceplate (645) towards the top faceplate (647) and terminates in a hollow spherical opening forming joint (605). This hollow cylinder (635) houses the rod (403) and spring (203) and acts as the socket for ball (405). A hollow slot (623) runs the length of the cylinder (635) to hold leg (523) of the spring (203) in place. The turbine can then rotate about its central axis with its motion resisted by the spring (203) and constrained by the second pin (407) and slot (607) arrangement.
The final assembly of the three pieces is best shown in
The spring (203) will initially be in the relaxed position of
Once the pacing valve (105) has been assembled, the platform (411) is placed on the rim (123) of the bottle (100) with the turbine (201) arranged above the main body (101). The nipple (107) would then be placed on top of the pacing valve (or internal to the connector ring (103)) and the connector ring (103) would be screwed onto the mating threads (113) to secure both the nipple (107) and pacing valve (105) to the main body. It should be recognized that while this arraignment is preferred as it allows the pacing valve to be removable, it is not required and in an alternative embodiment the pacing valve may be constructed to be permanently attached to the main body (101), nipple (107), and/or connector ring (103) such as, but not limited to, by being monolithically constructed with those components or through the use of adhesives or other connecting methods, such as sonic welding.
In operation, when the infant is sucking on the nipple (107) the pacing valve (105) will function in the same manner as a typical turbine known to those of ordinary skill in the art. The velocity of the fluid flow from the main body (101) to the nipple (107) from the infant's suck will drive the turbine (201) to rotate as the fluid passes through the channel (601). This rotation will produce a torque that loads the spring (203) and will also serve to slowly misalign the openings (611A) with the openings (401). The second pin (407) will also traverse the track (607).
As should be apparent, the three openings (611A) of the bottom faceplate allow significant fluid through to the nipple (107) only when at least partially aligned with the openings (401). In the initial open state, fluid flows through the turbine (201). As fluid flow drives the turbine (201) to rotate, fluid flow will be continually restricted due to the continuously increasing misalignment of the openings (611A) and (401) until the force of the sucking action is no longer sufficient to pull fluid through the constricted opening. This position is the closed state of the pacing valve (103) and there is little to no overlap between the open slots (611A) and the slots (401), hence little to no fluid (or more accurately insufficient fluid for the infant to be feeding) can move from the main body (101) to the nipple (107).
The stoppage of the fluid flow in the closed state of the pacing valve (105) cues the infant to stop sucking and swallow and breathe. As the infant ceases sucking, the load on the spring (213) will release its energy and rotate the turbine (201) back to its initial open position at which point fluid will freely flow through the pacing valve (which is now in the open position again) and the process will begin again. The secondary rod (407) and track (607) is provided to prevent the turbine (201) from turning too far if the infant has a particularly strong or persistent sucking action (e.g. they do not breathe until after the pacing valve has been in the closed position for a reasonably substantial amount of time). Such a scenario could result in the turbine (201) rotating to a point where the next turbine hole (611A) aligns with the a different hole (401). Thus, should this scenario occur, the second rod (407) will contact the far end of the track (607) from its starting point and prevent any further motion of the turbine (201). The rod (407) and track (607) can also inhibit the spring (203) from backlashing the turbine (201) past the open position when moving from the closed to open state.
It is understood that an infant may be fatigued from the difficulty to feed using the device as the infant is working against the spring (203) biasing force with every suck. It is not believed that this will cause any harm to the infant, but fatigue and frustration are not ideal as they may hinder the infant in learning proper feeding techniques. This concern is best relieved by altering the spring (203) stiffness to select a spring (203), and therefore pacing valve (105), which has the appropriate force based on the particular infant's suck strength.
It is preferred that the base (205) and turbine (201) be made out of a lightweight plastic with the same or similar properties as the type of plastic used in making baby bottles. This will provide sterility and the ability to be washed in the same manner as the baby bottle. The spring will preferably be made of a non-reactive metal for similar reasons. It is unlikely fluid will be in significant contact with the spring (203) as the spring (203) is essentially encased in the cylinder (635) and blocked by the solid part of the platform (411).
In an embodiment, the base and turbine will both be made of polypropylene or another durable and generally inert material. Polypropylene is a durable plastic commonly used in baby bottles, and thus is known to interact safely with the fluids infants feed on while providing the structural stability required. It is non-toxic, including Bisphenol A (BPA) free, and has a melting point of 160° C., making it sufficient for warming formula before a feeding if desired. It also has a high resistance to stress. Polypropylene is also lightweight, which assists the turbine (201) to rotate given the low flow velocities and pressures encountered during infant feeding. Another significant property of polypropylene which makes it conducive to construction of the base (205) and turbine (201) includes its resistance to many agents, and although there are a few agents that cause it to degrade, such as UV radiation, these agents are not factors that will be encountered by the device during typical use. This resistance allows for the parts to be used for long periods of time, to be dishwasher safe, and to resist degradation from normal use.
The spring (203) is preferably made of Type 316 stainless steel. This is highly resistant to corrosion, making it a safe material for interaction with fluid within the bottle (100) and for cleaning. Alternatively, the spring (203) can be made out of a plastic.
As many infants will eventually pick up on the rhythm of feeding after 4 or 5 repetitions during any given feeding, when an infant begins to start pacing naturally, it can be beneficial to let the infant maintain this pace on their own without the assistance of the device. This will encourage correct feeding behavior. Since initiating feeding can be difficult, it would defeat the purpose to remove the bottle from the infant's mouth to remove the pacing valve (105) if the infant begins to self-pace. In an embodiment, the pacing valve (105) will be capable of being externally shut off during the feeding without disturbing the feeding. In particular, the turbine could be locked into the open position.
In an embodiment, this locking can be provided by a switch near the connector ring (103) which can be used to engage with the turbine (201) and prevent its rotation. Generally, this would be accomplished by providing a connector ring (103) specifically designed for this purpose as the switch would generally need to act through the main body (101), connector ring (103), and/or nipple (107).
Alternatively, there can be provided a frictional or rotational engagement in the turbine (201). In an embodiment of such an arrangement, a ball bearing and slot arrangement could be provided where the bottle (100) has a particular rotation and orientation. In one orientation, the ball bearing is disengaged from the turbine (201) and the turbine (201) may rotate as discussed above. In an alternative arrangement, the bottle (100) itself may be rotated about its axis which will cause the ball bearing to move and frictionally engage the turbine (201) serving to lock it into a particular position.
In a still further embodiment, a latch can also be included to prevent the turbine (201) from spinning, thus turning the device off. The latch could simply move in front of the second rod (407) securing the rod (407) at a fixed point in the track (607) and preventing the turbine (201) from opening. The latch may attach to the platform (411) and be aligned with the track (607). In the unlocked position, the latch will be in the plane of the platform (411), not extending any significant distance into the track (607). In the locked position, the latch will be pointed upwards, going into the track (607), thus preventing the second pin (407) from moving in the track (607).
While the above has discussed a particular system for providing mechanical pacing of an infant feeding while using a pacing valve, there are also described herein additional alternative embodiments of a pacing system.
In a first embodiment, there is a provided a custom nipple which is a generally a thicker nipple design, in which small tubes connect the nipple opening to the main bottle opening. The outer edge of the nipple follows a standard nipple shape as shown in
There is then provided a generally cylindrically shaped collar. The inner portion of the lower lip of the collar is designed to screw onto a standard NICU baby bottle. A switch is located on the outer portion of the collar, easily accessible by a NICU nurse to change the state to one of 2-4 finite positions. The switch is easily moved by the thumb of the hand administering the bottle. Within the collar, a thin disc is connected to the switch. The disc aligns perpendicularly with the flow of fluid and is approximately the same diameter as the base of the nipple. It lies extremely close to the base of the nipple. The disc contains an equal number of holes as the number of tubes that connect the teat to the base of the nipple. The switch is connected to the edge of this disc. When the switch is in the off position, the disc rotates to a position so that the holes in the disc do not align with the holes in the base of the nipple, and no fluid may flow through the bottle. From above, the collar has a donut shape, with an inner diameter that is wider than the nipple base diameter, but smaller than the nipple base lip. This allows the nipple to pop into the collar securely.
In this embodiment, the nipple and collar system is designed to allow a nurse to quickly and easily start and stop the flow of fluid to an infant immediately. By intermittently stopping the fluid flow, the infant will be cued to stop sucking, swallow the fluid and breathe, preventing aspiration and other complications. When the infant is ready to suck again the nurse can start the flow of fluid without the nipple leaving the infant's mouth.
To intermittently stop the flow of fluid, the user moves the switch on the outside of the collar. Internally, the switch is connected to the disc, which now rotates to the on position and aligns with the holes in the nipple. The switch can then be switched back to the off position, which rotates the disc to misalign with the holes in the nipple and stop fluid flow. In the off position, the volume of fluid in the nipple would be approximately 1 cc, enough for 1 bolus (1 swallowing iteration) for the premature infant.
In a still further embodiment, there is a floating ball design, where the ball clogs the nipple to prevent fluid flow. The nipple in this design has a standard outer shape shown as in
On the outer edge of the collar, a switch can be set to 3 positions. The switch is designed to be easily maneuverable by the thumb of the user who is feeding the infant. The 3 positions for the switch are on, off and auto. In the On position fluid is allowed to flow through the bottle. In this state the switch manually moves the ring at the bottom of the cage away from the teat, preventing the ball from stopping fluid flow. In the Off position the switch manually moves the ring at the top of the track towards the teat, to force the ball to prevent fluid flow through the nipple. In the Auto position, neither ring is moved, which allows the ball to float. When the infant sucks, the ball moves with the flow of fluid and is sucked onto the ring near the teat. The ring stops the ball, and clogs the device, preventing flow. Once the infant stops sucking, the ball may once again float away from the ring and allow fluid to flow into the teat.
This lift and clog design incorporates a ball and track system to halt formula flow. In this system a non-reactive mesh metal divider separates the nipple from the rest of the bottle. The divider is located as far away from the nipple end as possible. The mesh allows formula to flow through the divider into the nipple opening. A plastic, air filled ball of about 1 cm diameter is trapped within the mesh nipple portion. The ball floats to the top of the liquid within the bottle (the bottom of the bottle when in the upside down drinking position). When the formula flow velocity is quick enough, the ball will be sucked into the nipple end and plug the flow of milk from reaching the infants mouth. Once the flow has stopped, the infant is cued to breathe and swallow. The formula stops flowing and the ball floats away allowing for future repetitions.
A switch would extend from the base of the nipple cap and have an On and Off position. The switch would be attached to a thin metal rod that obstructed the nipple ending in the Off position so that the ball could not clog the formula flow. Ball in cage check-valve concept. When the infant ceases to suck/breathes, the hollow ball floats to top of cage and the space below the ball fills with liquid. When the infant sucks forcefully enough, the ball will be entrained to seat on the ring and occlude flow. Flight of ball determines bolus volume. The ball in cage/lift and clog mechanism has a base that sits on the neck of the bottle and gets secured in place when the cap is screwed on. There is a cage that sits inside the bottle and attaches to the base. The cage is only (3 or 4) skinny rods in a cylindrical shape, meant to keep the ball in a guided track. The cage's outer diameter is barely smaller than the neck to allow easy insertion of the device, yet large enough to prevent any leaks. By the neck of the bottle, there is a ring of a smaller circumference than the ball. This ring stops the ball, thus clogging the device. The ring is solidly attached to the cage and base components. The ball must match the circumference of the inner cage and be larger than that of the ring. It will be understood that the buoyancy of the ball is key for the proper operation of the device.
In the event that the device gets caught or stuck, thus inhibiting the function of the device or feeding in general, the option to reset the device would further advance the design. This, however, is generally unlikely since the material flowing through the turbine is usually a smooth liquid. Infant formulas are designed to quickly dissolve in water and to not have “lumps” as this can be dangerous in feeding. Thus, the turbine is unlikely to jam (barring a failure of a portion of the device) as there is little for the device to jam on. Further, a jam resulting for damage to a component should result in the devices use being quickly discontinued anyway to prevent any danger.
In the bottle (800) of
The chamber (805) will generally be filled with either previously expressed milk, with prepared formula, or with some combination. Other fluids (803) may also be provided in particular cases, such as to provide oral medication. The chamber (805) may be filled separately, in an embodiment, and then sealed with a cap such as a single use locking cap. Such a single use locking cap can be, but is not limited to, one which is irrevocably damaged when it is removed or used such as those traditionally used for food which have a breaking locking ring, or those that include a breakaway tab to form a connection hole. This allows for formula or other fluids to be prepared in advance and stored in a plurality of storage chambers (805).
When it is time to feed an infant, a storage chamber (805) is attached to a feeding tube (815). The tube (815) will generally be removable from the chamber (805) and attached to the chamber (801), but it may be co-formed as a part of the chamber (805) or as part of a cap for the chamber (805). The tube (815) is then threaded through the rollers (827) of a peristaltic pump (807) which is connected to an attached motor (817) and control system (887). The motor (817) is preferably a stepper motor which is capable of producing a certain fixed amount of motion based on number of complete or partial rotations. The stepper motor (817) will preferably have a step size sufficiently small that each step is no larger than the rotation between adjacent rollers (827) of the peristaltic pump (817).
Once threaded through the pump (807), the tube (815) continues into the nipple (811) from within the body (801) of the bottle (800). In the depicted embodiment, the tube (815) is positioned so as to be in contact with the end (821) of the nipple (811) and will generally be positioned so as to place its hollow internal volume (851) in contact with a hole (831) located at the end (821) of the nipple as is common in nipples today. This segregates the hollow internal volume (851) of the tube (815) into two segments. A forward segment (853) into which segment the peristaltic pump (807) will feed fluid, and the rearward segment (855) which is in fluid communication with the storage chamber (805). It also allows the drip rate of the bottle (800) to be selected by the size of the hole (831) as is currently known to those of ordinary skill in the art.
Depending on the embodiment, the tube (815) may be co-formed with the nipple (811) so as to provide for the positioning discussed above, or it may be manufactured separately. In an embodiment, the nipple (811) may include a positioning guide or mount that allows for the tube (815) to be reliably positioned. For example, the forward end of the tube (815) may act as a male connector with a molded mating female connector being positioned on the inside of the tip (821).
Alternatively, the tube (815) may simply be positioned in the depicted arrangement because that is the most likely position given the shape of the nipple (811) tip (821) and tube (815). This arrangement can work particularly well if the outer diameter of the tube (815) is generally similar to the inner diameter of the teat (823) portion of the nipple (811). In a still further alternative embodiment, the tube (815) does not need to be positioned directly adjacent to the hole (831), but there may be positioned within the nipple (811) a sub-chamber (897) which is formed by a barrier (899) (shown in dashed form as this element is need not be present in
Regardless of how the tube (815) is connected to the hole (831), their will generally be considered a fluid reservoir created by the arrangement. Specifically, the reservoir is the fluid which is within the forward portion (853) of the internal volume (851) of the tube (815) and any sub-chamber (897) to which that forward volume (853) is attached prior the hole (831). For ease of reference, and regardless of embodiment or volume, this volume is referred to as the feeding reservoir (859) herein. In the depicted embodiment of
Regardless of the manner of positioning of the tube (815) to form the feeding reservoir (859), the tube (815) will generally extend from the chamber (805) through the pump (807) and into the teat (823). This is, however, not required as the tube (815) may terminate at a point outside the teat (823) if a barrier (899) is present outside the teat (823). Generally the tube (815) will be constructed of medical silicone or a similar material and in an embodiment, the material used is similar to the material of which the nipple (811) is formed. In order to position the tube (815), the tube (815) will generally be placed first inside the nipple (811) through its open back end (861) and then simply pushed up into contact with the tip (821). Alternatively, the tube (815) can be threaded through the tip (821). In this later embodiment, the hole (831) will generally simply be the end of the hollow interior (851) of the tube (815) as opposed to their being a separate hole (831). The tube (815) will be considered “thick walled” in many embodiments and may have a wall thickness greater than or equal to the diameter of the internal volume (851).
Once the tube (815) and the nipple (811) have been connected, the tube (815) will generally be connected to the chamber (805). The entire tube (815), chamber (805), nipple (811) assembly will then be laid into the body (801) of the bottle (800). With the tube (815) run through the peristaltic pump (807) resulting in the tube (815) being pinched by the pump wheels (827) in the well understood manner of a peristaltic pump (807). In order to facilitate the assembly positioning, the body (801) may open as a clamshell with a lid (802A) being hinged to an opposing clamshell base (802B) to form the body (801). Similarly, the pump wheels (827A) and (827B) may be moved apart (e.g. with wheel (827B) moving left and wheel (827A) moving right in
It should be recognized that
Generally, the chamber (805), tube (815), and nipple (811) assembly will be designed to be disposable after a single use. As should be apparent, the use of a peristaltic pump (807) to move the fluid provides that the chamber (805), tube (815) and nipple (811) are the only components in fluid contact with the milk or formula and the infant's mouth. The remaining components of the device (800) can therefore be reusable between multiple infant's and multiple feedings, potentially with minimal cleaning and/or sterilization. While this arrangement is preferred, it is not required and the whole device (800) may be disposable in an alternative embodiment, or may be entirely cleaned and sanitized between uses.
As indicated above, the motor (817) is generally a stepper motor and is designed to provide for the ability to produce particular step-wise motion even in partial or complete revolutions of its drive shaft. The wheels (827) of the peristaltic pump (807) will generally be sized and shaped so that they will rotate between two adjacent contact wheels (837) being at a fixed location with the tube (815) for a given number of steps producible by the motor. Gearing to accomplish this may be provided as necessary. Thus, the motor (817) can produce a single step between two adjacent rollers or the distance (837). This means that a relatively small amount of fluid in the tube (815) (specifically the amount of material that fits in the tube (815) between the two adjacent rollers (837)) will be pushed from the hollow interior (851) of the tube (815) that is behind the pump to that space (853) in front of the pump (807). This corresponds to an increment of fluid that is moved from the storage chamber (805), to the feeding reservoir (859) in a single iteration of the pump (807). Thus, the amount of fluid available in the feeding reservoir (859) is equal to the amount of fluid moved by the pump from the storage chamber (805) to the feeding reservoir (859) since the device (800) started operating minus the amount of fluid removed from the feeding reservoir via the hole (831).
It should be apparent from the above, the maximum amount of fluid that can be obtained by an infant sucking on the teat (723) at any time is the amount of fluid in the feeding reservoir (859) at that time. Thus, to control the feeding, a user will generally select the amount of fluid they want to provide the infant between each swallow and breath (the amount per suck) or at predetermined periods of time using a control dial (847) or similar device. This serves to regulate the amount of fluid in the feeding reservoir (859), generally by providing a maximum amount available. The amount to be provided as set by the control dial (847) will generally be interpreted by a control system (887) (such as but not limited to an appropriately programmed microprocessor) which then serves to operate the stepper motor (817) to provide the desired amount based on a certain number of pump (807) rotations being initiated. The amount provided may be shown on a display (857) which can also provide other valuable feeding information including, but not limited to, the total amount of fluid provided or the amount of time the feeding has progressed for.
In operation the device of
Once the feeding amount has been selected, the bottle (800) will generally be turned upright (placing the left side of device (800) as illustrated in
The motor (817) will now turn based on the desired feeding amount. The activation of the motor (817) will generally be controlled by the control system (887) which may be a computer processor of standard type and appropriate software (instructions stored on a computer readable media) to provide the amount, or by corresponding mechanical means and structures. In the event that a fixed amount per feeding is provided, the control system (887) will generally instruct the motor (817) to turn an appropriate number of turns (generally in rapid succession) to allow that amount of fluid (803) to pass from the storage chamber (805) to the feeding reservoir (859). The control system (887) will then generally halt the pump (807) and wait for an indication of a breathing event.
The infant will now generally be sucking on the nipple (811). As should be apparent, the selected amount of fluid in the fluid reservoir (859) is accessible from the nipple (811). The fluid, however, will not generally drip out of the nipple (811) (although it may depending on the size of opening (831)). Instead, the infant will suckle the nipple (811) compressing and sucking. The compression and sucking may serve to overcome surface tension of the fluid inside the forward portion (853) of the tube (815) and expel the fluid forward and out of the hole (831) and into the infant's mouth. As should be apparent, once all the fluid in the fluid reservoir (859) has been expelled, the infant's attempts to get more fluid will not result in any more available. Instead, they will be sucking on what is essentially a pacifier. It is expected that the failure to obtain more fluid will trigger a swallow-breathe response from the infant to swallow that milk which is now in their mouth if they have not breathed before then.
Upon a swallow-breathe response being detected from the infant (either manually by the user such as by triggering button (867) or through an automated detector such as that shown in
Upon completion of the feeding routine, the bottle (800) will be removed from the infant's mouth. The body (801) is then generally opened and the nipple (811), tube (815) and chamber (805) assembly is removed. The chamber (805) may include graduated markings to indicate the amount of fluid remaining for record purposes and/or the display (857) may be consulted to determine how much fluid the infant consumed. The nipple (811), tube (815), and chamber (805) assembly is then generally discarded as appropriate waste. The control system (887) may store information related to the feeding in an on-board memory, or such information may be discarded after feeding is complete. Alternatively, the on-board memory may be downloaded into an associated computer program such as through the use of a base station which serves to both download information from the control system (887) and may serve to recharge a battery (888) for controlling the onboard electronics and motor (817).
The operation of the bottle (800) is similar if a feeding rate is used, but the control and presentation is somewhat different. If a rate is used, the bottle (800) will generally preload the feeding reservoir (859) and wait for the infant to suck. The motor (817) will then generally perform turns to provide for the appropriate rate as the infant is suckling. For example, if the rate is 1 ml per minute and each turn moves 0.1 ml through the pump (807), the motor (817) will generally commence one turn of the pump (807) every six seconds. Alternatively, it may turn 10 times at every sixty seconds, 5 times at every thirty seconds, or any other type of pattern. As opposed to the operation with a fixed amount, there is generally no need to trigger the next pump (807) rotation based on a breath event. Instead, the pump (807) rotations occur on a generally constant timed basis. However, as should be apparent, the amount of fluid available to the infant is still limited. Thus, an infant who takes in fluid faster than the selected rate, will end up with at least a short window with no food available which should trigger a swallow-breath response. Alternatively, an infant that is feeding too slow will generally not have much available fluid to potentially choke on as the amount available is always limited by the amount in feeding reservoir (859), and this can be limited to an absolute maximum (akin to the limitation when a fixed amount is presented discussed previously). Should the feeding reservoir (859) be full, the pump (807) and/or control system (887) or attached sensor may detect this and halt the pump (807) until the amount is reduced a certain amount, or until a swallow-breath event is detected.
The above discussion of
The embodiment of
A concern with the device of
In an embodiment of
An embodiment utilizing pressure differential to feed the tube (815) from the storage chamber (805) can be particularly useful for certain infants. A plunger arrangement can be very familiar to current nurses as it is similar to feeding with a syringe and tube which is commonly performed in hospital settings. This embodiment of bottle (800) can, therefore, allow for the use of a syringe and tubing typically used in tube feedings to be provided with a device (800) to adapt the system directly into a bottle system (800) for intermittent flow oral feedings. To provide a hard cut-off, the flow can be regulated by an on-off switch (manual or automatic) which can inhibit the fluid (803) from flowing even in the event of a pressure differential from an infant continuing to suck. This can allow for the plunger to be provided with a constant pressure (e.g. from a mass or from a user maintaining a constant force on the plunger) while still dispensing fluid intermittently.
The breath monitor (911) may be any type of sensor capable of detecting a breath. This can be a pressure monitor detecting a change in air pressure due to a breath, or a device which senses air movement, for example. The breath monitor (911) will then generally be connected to the control system (887) for the bottle (800). This may occur through an electrical and data connection being made when the mask (900) is placed on the bottle (800). In this way, the provision of additional fluid (803) from the storage chamber (805) to the feeding reservoir (859) can be provided as part of a feedback loop. In particular, once the user has set the amount of fluid, the system will provide it and then trigger additional fluid (as discussed above) when the monitor (911) detects a breath. In this way, the feeding is accomplished automatically without need for the user to monitor the infant for swallowing and breathing at all. The entire feeding process is performed and monitored by the bottle (800) mask (900) combination.
Further, while the embodiment of
In a still further embodiment, the breath sensor (911) could be replaced with a pressure sensor where instead of a breath event being detected at the infant the infant letting up sucking pressure on the nipple (811) is detected. This is similar to the embodiment of
It should be apparent from the above that systems and methods are provided which allow for the feeding of infants that have not mastered the suck-swallow-breathe process generally considered to be standard for infant feeding. It is important to recognize that while the systems and methods discussed can serve to train an infant to perform the process through positive feedback when the process is performed correctly, the primary purpose of most of the embodiments is not training, but is to provide nutrition. In this way, the systems and methods serve to reduce or eliminate the need for an infant to remain hospitalized simply because they have not mastered the suck-swallow-breathe process or because their feeding needs to be monitored. Instead, the infant can be sent home and a parent, even with little to no training, can successfully perform and monitor feeding.
Further, while the systems and methods discussed herein are particularly useful for premature infants that have not mastered the suck-swallow-breathe process, their use is by no means confined to them. Embodiments of the systems and methods can also be useful for infants, including full term infants, that have other medical issues that can complicate feeding or for infants where monitoring the amount of food intake is important. As the systems and methods are capable of monitoring and recording details of each feeding in a variety of ways, the systems and methods can be useful for feeding any kind of infant where monitoring of fluid uptake, rate of fluid uptake, and other feeding criteria are desired. An example of alternate applications would be for infants with gastroesophageal reflux, for whom slow, graded feedings can eliminate symptoms of reflux by providing time for gastric emptying prior to more fluid flowing from the nipple for the infant to then manage. It can also be used with infants who tend to consume bottles too quickly, increasing symptoms of discomfort and gas, by slowing down the feeding and allowing fluid to only flow at predetermined, specific intervals of time.
While the invention has been disclosed in conjunction with a description of certain embodiments, including those that are currently believed to be the preferred embodiments, the detailed description is intended to be illustrative and should not be understood to limit the scope of the present disclosure. As would be understood by one of ordinary skill in the art, embodiments other than those described in detail herein are encompassed by the present invention. Modifications and variations of the described embodiments may be made without departing from the spirit and scope of the invention.
This application is a Continuation of U.S. Utility patent application Ser. No. 16/734,059, filed Jan. 3, 2020 and will issue as U.S. Pat. No. 11,077,027, which is a Continuation of U.S. Utility patent application Ser. No. 15/797,499, filed Oct. 30, 2017 and having issued as U.S. Pat. No. 10,555,875, which is a Continuation of U.S. Utility patent application Ser. No. 14/709,237, filed May 11, 2015 and having issued as U.S. Pat. No. 10,434,035, which is a Continuation-in-Part (CIP) of U.S. Utility patent application Ser. No. 14/205,574, filed Mar. 12, 2014 and having issued as U.S. Pat. No. 9,033,167, which, in turn, claims benefit of U.S. Provisional Patent Application Ser. No. 61/777,312, filed Mar. 12, 2013, and now expired. The entire disclosure of all the above documents is herein incorporated by reference.
| Number | Name | Date | Kind |
|---|---|---|---|
| 20140242213 | McCarty | Aug 2014 | A1 |
| Number | Date | Country | |
|---|---|---|---|
| 20210361533 A1 | Nov 2021 | US |
| Number | Date | Country | |
|---|---|---|---|
| 61777312 | Mar 2013 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 16734059 | Jan 2020 | US |
| Child | 17391978 | US | |
| Parent | 15797499 | Oct 2017 | US |
| Child | 16734059 | US | |
| Parent | 14709237 | May 2015 | US |
| Child | 15797499 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 14205574 | Mar 2014 | US |
| Child | 14709237 | US |
