DE102021002645B3 - Folding pocket for holding and heating an infusion bag - Google Patents

Abstract

A new container for receiving and heating infusion bags should be designed in such a way that it is suitable for use.
To this end, the new container has the following features:
a. the folding bag (1) has a first folding side part (20) and a second folding side part (40) which are connected to one another via a folding connection (30),
b. in a folded position of the folding pocket (1), an inner side (21) of the first fold side part (20) and an inner side (41) of the second fold side part (40) face each other,
c. On the inside (21) of the first folded side part (20) and on the inside (41) of the second folded side part (40) there is a surface heater (93).
i.e. A receiving pocket (50) for an infusion bag (10) is arranged between the inside (21) of the first folded side part (20) and the inside (41) of the second folded side part (40),
e. An infusion bag temperature sensor (91) is arranged in the folding pocket (1) and rests against an infusion bag (10) in the folded position,
f. the infusion bag temperature sensor (91) and the surface heating (93) are connected to a temperature controller (90) integrated in the folding bag (1), which is connected to a battery (94),
G. the folding pocket has a roll-up pocket (70) for receiving an infusion set,
H. the roll-up pocket (70) is arranged on an outside of a folding side part (20, 40).

Description

The invention relates to a folding pocket for receiving and heating an infusion bag.

From the DE 200 00 304 U1 a folding pocket for holding and heating an infusion bag emerges. The folding bag has features a, b, e and f of claim 1. The surface heating is designed as a warming sleeve and can be fixed around an infusion bag.

the DE 10 2007 021 406 A1 shows a temperature control bag for holding and heating an infusion bag. The temperature control bag has a flexible front and rear wall, each with surface heating. An infusion bag temperature sensor is arranged in the temperature control pocket and rests against an infusion bag that has been received. The infusion bag temperature sensor and the surface heating are connected to a temperature controller integrated in the folding bag, which is connected to a battery.

the DE 38 00 283 A1 shows a folding pocket for receiving and heating an infusion bag. The folding bag has the features a, b and c of claim 1. A heated liquid or, alternatively, an electric heater can be used for heating.

the U.S. 2,093 H1 shows a folding pocket for receiving and heating an infusion bag. The folding bag has the features a, b and c of claim 1. Chemical heat pads are used for heating.

the U.S. 2008/0 296 190 A1 shows a shoulder bag for receiving and carrying an infusion bag.

the U.S. 2017/0 368 302 A1 shows a roll-up case for holding medical devices.

From the DE197 52 578 A1 a transportable heat box for receiving and heating an infusion bag is known. The heat box has a panel with surface heating. The plate is used to store an infusion bag. The plate heated with the surface heating heats an infusion bag lying on the plate. An IV bag temperature sensor is located in the lid of the warming box. When the lid is closed, the infusion bag temperature sensor touches the infusion bag on a side opposite the heating side. The infusion bag temperature sensor is connected to a temperature controller integrated in the warming box, which can be connected to a battery. To prevent the plate from overheating, another temperature sensor measures the surface temperature of the heated plate. The other temperature sensor is a bimetallic switch that temporarily switches off the heating current in the event of overheating. Since the warming box is designed for the transport of dialysis fluid in a vehicle, it is not designed for this and is therefore not suitable for being carried on an assignment, for example as a piece of backpack luggage.

Apart from the invention are systems such as in WO 2013 053 674 A1 described in which not the entire infusion bag is heated, but the flow of liquid taken from it. For this purpose, the infusion liquid flows through heatable channels. A heater, an infusion bag temperature sensor, a temperature controller and a battery are also used in these systems.

The invention is based on the DE 200 00 304 U1 The task is based on designing a container for receiving and heating infusion bags in such a way that increased suitability for use is given.

This object is achieved according to the invention by the features of claim 1.

• • dass erstens in einer eingefalteten Stellung der Falttasche eine Innenseite des ersten Faltseitenteils und eine Innenseite des zweiten Faltseitenteils einander gegenüberliegen, und
• • dass zweitens auf der Innenseite des ersten Faltseitenteils und auf der Innenseite des zweiten Faltseitenteils eine Flächenheizung angeordnet sind,

wird erreicht, dass ein Infusionsbeutet über einen großen Teil seiner Außenoberfläche von zwei Seiten beheizt wird. Dies beschleunigt eine Aufheizung eines Infusionsbeutels unter Vermeidung von örtlichen Überhitzungen. In der Falttasche ist ein Infusionsbeutel-Temperatursensor angeordnet, der in der eingefalteten Stellung an einem aufgenommenen Infusionsbeutel anliegt, um die Temperatur des Infusionsbeutels zu regeln. Der Infusionsbeutel-Temperatursensor und die Flächenheizung sind an einem in der Falttasche integrierten Temperaturregler angeschlossen, der an eine Batterie angeschlossen wird. Die Falttasche weist eine Rolltasche zur Aufnahme eines Infusionsbestecks auf. Nach einer Entnahme des Infusionsbestrecks kann die aufgerollte Rolltasche als halbsterile Auflage zum Ablegen des Infusionsbestecks dienen. Dies stellt eine wesentliche Erleichterung in einem Notfall dar. An einer Außenseite eines Faltseitenteils ist die Rolltasche angeordnet. Hierdurch kann bei stehender Tasche die Rolltasche handhabungsleicht seitlich abgerollt werden.The invention has many advantages. Since a folding bag is used to hold and heat up an infusion bag, this is a light object that can also be easily carried in a backpack by emergency services. The fact that the folding pocket has a first folding side part and a second folding side part, which are connected to one another via a folding connection, ensures simple handling, cost-effective production and simple accommodation of an infusion bag. Kinematically, the folding joint is a pivot joint. A receiving pocket for an infusion bag is arranged between the inside of the first folded side part and the inside of the second folded side part. The receiving pocket can be designed as desired, since its function is only to hold an infusion bag so that it cannot fall out of the folding pocket when it is in the folded-out position. Thereby,

• • that firstly, in a folded-in position of the folding pocket, an inside of the first folding side part and an inside of the second folding side part are opposite one another, and
• • secondly, surface heating is arranged on the inside of the first folded side part and on the inside of the second folded side part,

it is achieved that an infusion bag is heated from two sides over a large part of its outer surface. This speeds up heating an infusion bag while avoiding local overheating. An infusion bag temperature sensor is arranged in the folding pocket and, in the folded position, rests against a received infusion bag in order to regulate the temperature of the infusion bag. The infusion bag temperature sensor and the surface heating are connected to a temperature controller integrated in the folding bag, which is connected to a battery. The folding bag has a roll-up pocket for holding an infusion set. After the infusion set has been removed, the rolled-up roll-up bag can serve as a semi-sterile support for storing the infusion set. This represents a significant relief in an emergency. The roll-up pocket is arranged on the outside of a folding side part. As a result, when the bag is standing, the roll-up bag can be unrolled sideways, which is easy to handle.

According to an advantageous embodiment of the invention, in an unfolded position, the surface heating, which is arranged on the inside of the first foldable side part and the inside of the second foldable side part, forms a plane. As a result, the folding bag can surprisingly also serve in a double function as an electric blanket for a hypothermic person according to the principle of a Hibler heat pack.

According to an advantageous embodiment of the invention, a balloon bag is held in a balloon compartment, which is inflated with a pump bladder. An inflated balloon bag exerts a compressive force on an IV bag. Therefore, it is not necessary to hang the infusion bag in an elevated position. This makes it easier to transport a patient.

According to an advantageous embodiment of the invention, the temperature controller, the battery and the pump bellows are held on the outside of the other folded side part. This optimizes an arrangement of the folding bag utensils with regard to a good overview and handling.

According to an advantageous embodiment of the invention, the temperature measured by the infusion bag temperature sensor is regulated to 30°C to 42° Celsius. If the target temperature is slightly above body temperature, this is harmless, since the infusion liquid will still cool down a little before it reaches the body.

According to an advantageous embodiment of the invention, the temperature controller has a controller in which a P and an I component are combined with one another. The P component reacts quickly, but with residual deviations, while the I component slowly but precisely corrects any remaining control deviations. There is no need for a D component since the temperature control to be carried out is sluggish. The controller used shortens an initial heating-up phase, since the P and I components ensure a high heating output in combination with a low control deviation.

According to an advantageous embodiment of the invention, the temperature controller is designed in such a way that it switches itself on immediately after the battery is connected. Since there is nothing to set and switch on, handling is safe and easy.

According to an advantageous embodiment of the invention, the temperature controller is a digital controller. Likewise, the IV bag temperature sensor is a digital sensor. The digital controller includes a microcontroller that applies pulse width modulating signals to an electronic switching element that opens and closes a circuit of the battery and surface heating. A temperature controller configured in this way works surprisingly well for precisely setting the temperature of the infusion bag. Furthermore, such a digital controller is highly flexible. This is shown by the fact that other infusion bag temperature sensors can only be connected with modified software.

An embodiment that builds on the previous embodiment is therefore particularly advantageous. In this case, a surface heating temperature sensor is also arranged on the surface heating, which is also a digital sensor and is also connected to the microcontroller in such a way that the microcontroller limits a heating output with pulse width modulation when the temperature recorded by the surface heating temperature sensor is more than 50°C. A temperature of more than 50°C indicates an error. The heating output is therefore limited to a residual heating output. The residual heat output avoids consequential damage, but ensures residual functionality. A suitable value for the residual heating power is in the range of 5% to 15% of the maximum heating power.

• 1 eine Falttasche in der eingefalteten Stellung, in einer Draufsicht;
• 1a die der 1 zu Grunde liegende Prinzipskizze;
• 2 die Falttasche in der ausgefalteten Stellung, in der Draufsicht;
• 2a die der 2 zu Grunde liegende Prinzipskizze;
• 3 die Falttasche in der Unteransicht;
• 3a die der 3 zu Grunde liegende Prinzipskizze;
• 4 die Falttasche, in der Seitenansicht;
• 4a die der 4 zu Grunde liegende Prinzipskizze;
• 5 einen Schaltplan eines Temperaturreglers;
• 6 eine Illustration einer vom Temperaturregler erzeugten Pulsweitenmodulierung zur Beaufschlagung der Flächenheizung.

Exemplary embodiments of the invention are described in more detail below with reference to the drawings. show:

• 1 a folding bag in the folded position, in a plan view;
• 1a the the 1 underlying principle sketch;
• 2 the folding bag in the unfolded position, in plan view;
• 2a the the 2 underlying principle sketch;
• 3 the folding bag from below;
• 3a the the 3 underlying principle sketch;
• 4 the folding bag, in side view;
• 4a the the 4 underlying principle sketch;
• 5 a circuit diagram of a temperature controller;
• 6 an illustration of a pulse width modulation generated by the temperature controller to apply the surface heating.

the 1 , 2 , 3 and 4 are derived from photos of a prototype. the 1a , 2a , 3a and 4a are associated principle sketches and indicate the viewing direction with an arrow.

How best 2 illustrated, the folding pocket 1 serves to hold and heat an infusion bag 10 . The folding pocket 1 has a first folding side part 20 and a second folding side part 40 which are connected to one another via a folding connection 30 .

The folding bag 1 is made of light but durable and water-repellent textile materials. The fold connection 30 connecting the first fold side part 20 and the second fold side part 40 is formed by a flexible design of the textile materials in this area.

the 2 shows an inside 21 of the first folding side part 20 and an inside 41 of the second folding side part 40. In a folded position of the folding pocket 1, as in FIG 1 shown, the inner side 21 of the first folded side part 20 and the inner side 41 of the second folded side part 40 are opposite one another. How best 2 shows, on the inside 21 of the first fold side part 20 and on the inside 41 of the second fold side part 40 a surface heater 93 is arranged. Deviating from the exemplary embodiment shown, a separate surface heating system, each with its own temperature sensor, could be arranged both on the inside 21 of the first folded side part 20 and on the inside 41 of the second folded side part 40 . In contrast to the exemplary embodiment shown, a number of surface heating systems could also be arranged on a single folding side part in the case of further requirements. Individual ones of the several panel heaters could be assigned to different infusion bag sizes. Or one of the several panel heaters could be assigned to an additional ampoule set.

The surface heating 93 is a textile heating element from j-Nova. This heating element is made of a flexible material that is easy to sew. The power density is 900 W/m2. The supply voltage is 12 V. The heating element is labeled "Blank 1.0 warming kit". The surface heating 93 has heating tracks running in parallel, which are delimited by dashed lines and are highlighted by a dot pattern. Spacer tracks without heating resistors run between the heating tracks.

In 2 about a third of the infusion bag 10 looks out of the receiving pocket 50 . The exception pocket 50 is an elastic mesh fabric and does not impede heat transfer from the panel heater 93 to the infusion bag 10.

in the in 1 In the folded position shown, the infusion bag 10 is arranged between the inside 21 of the first folded side part 20 and the inside 41 of the second folded side part 40 . This ensures good heat transfer since the infusion bag 10 is heated from both sides. A zipper is used to lock the first gusset panel 20 and the second gusset panel 40 in the folded position.

An infusion bag temperature sensor 91 is arranged in the folding pocket 1 and rests against an infusion bag 10 that has been received in the folded position. The infusion bag temperature sensor 91 is arranged in the area of a spacer track and not directly on one of the heating tracks of the surface heating 93 in order to record the temperature of the infusion bag 10 .

The infusion bag temperature sensor 91 and the surface heating 93 are connected to a temperature controller 90 which is integrated in the folding bag 1 and which can be connected to a battery 94 .

In an unfolded position, the surface heating 93, which is arranged on the inside 21 of the first folded side part 20 and the inside 41 of the second folded side part 40, forms a plane. Therefore, the folding bag 1 can also be used as an electric blanket.

3 and related 3a and 4 4a and associated FIG. A compressive force is thus exerted on an infusion bag 10 received by the receiving pocket 50 . Therefore, the folding pocket 1 does not need to be placed in an elevated position.

In 1 it is illustrated that the folding bag 1 has a roll-up bag 70 for receiving an infusion has cutlery. The rolled-up position of the roll-up bag 70 is illustrated with thin dashed lines.

The temperature controller 90 is configured to turn itself on immediately after the battery 94 is connected.

An LED (not shown) attached to the temperature controller 90 indicates the function.

Out of 1 , 2 and 3 show that the roll-up pocket 70 is arranged on the outside of a folding side part 40 . On the outside of the other folding side part 20, the temperature controller 90, the battery 94 and the pump bladder 61 are held.

5 1 illustrates that the temperature controller 90 is a digital controller. The infusion bag temperature sensor 91 is a digital sensor. The digital controller includes a microcontroller 95, which applies pulse width modulating signals to an electronic switching element 96, which opens and closes a circuit from the battery 94 and surface heating 93. With pulse width modulation, the switch-on time varies within a fixed period. the 6 illustrates an example value of 75% duty cycle per period. If, for example, the heating output is to be reduced, the percentage value must be reduced.

the 5 12 also shows the structure of the temperature regulator 90. The temperature regulator 90 receives the actual value of the temperature from the infusion bag temperature sensor 91, compares this actual value with a desired value and uses this to calculate a control deviation. A manipulated variable for the actuator, the surface heating 93, is calculated from the control deviation.

In addition, a surface heating temperature sensor 92 is arranged on the surface heating 93, which is also a digital sensor and is also connected to the microcontroller 95 in such a way that the microcontroller 95 generates a heating output at a temperature of more than 50° C. detected by the surface heating temperature sensor 92 limited by pulse width modulation. The surface heating temperature sensor 92 is how 2 shows, arranged directly on one of the heating tracks. At temperatures of the surface heating 93 of more than 50° C., the microcontroller 95 detects a fault in the heating system and limits the pulse width. The heating output is limited to a residual heating output. This avoids consequential damage, but ensures residual functionality. The residual heating capacity is 5% to 15% of the maximum heating capacity.

Microcontroller 95 is a Bluno-Nano microcontroller.

The battery 94 is a Li-Ion battery with 11.1 V.

The infusion bag temperature sensor 91 and the panel heater temperature sensor 92 are each a digital temperature sensor from Texas Instruments with the designation "Dallas DS18B20". The infusion bag temperature sensor and the panel heater temperature sensor 92 are connected to the serial data bus (I ² C) of the microcontroller.

A MOSFET is used as the electronic switching element 96 . The MOSFET is labeled "IRLIZ 44N" and is compatible with the microcontroller. The MOSFET blocks or opens the battery circuit of the panel heater. This is done according to control signals from the microcontroller.

A data memory compatible with the microcontroller serves as data memory.

The temperature controller 90 regulates the actual temperature received from the infusion bag temperature sensor 91 to a desired temperature, which has a value in a preferred range of 37 to 42° Celsius. A few degrees above body temperature are permissible, since the infusion liquid cools down on its way to the body.

The digital temperature controller has a P component and an I component implemented using a computer program. The P component of the controller acts proportionally. The control deviation e is multiplied by a gain factor, the proportional coefficient Kp. The implementation in the computer program takes place after $$\text{y}=\text{Kp*e}$$

$$\text{y}=\text{Ki*Ta*esum}$$

Im Computerprogramm ist esum die Summe aller bisherigen Abweichungen e. Der Parameter des Software I-Anteils ist abhängig von der Rechenschrittweite Ta (Abtastzeit). Je öfter gerechnet wird, desto öfter wird auch hinzugezählt (aufintegriert). Eine kleine Abtastzeit erfordert also einen kleineren Faktor, dies wird durch die Multiplikation mit Ta verwirklicht.The I component of the controller acts integrally. The I component of the controller works slowly, but ensures that a control deviation is completely eliminated. The control deviation is summed up over time. The sum obtained is multiplied by an amplification factor, the integration coefficient Ki. The I component is time-dependent and increases the manipulated variable the longer a control deviation persists. The implementation in the computer program takes place after $$\text{esum}=\text{esum}+\text{e}$$

$$\text{y}=\text{Ki*Ta*esum}$$

In the computer program, esum is the sum of all previous deviations e. The parameter of the software I component depends on the calculation increment Ta (sampling time). The more often it is calculated, the more often it is added (integrated). A small sampling time therefore requires a smaller one Factor, this is realized by multiplying by Ta.

Reference List

1

folding pocket

10

IV bag

20

first folding side part

21

inside

30

folding connection

40

second folding side part

41

inside

50

Pocket for infusion bags

60

balloon bag

61

pump bulb

70

roller bag

90

temperature controller

91

IV bag temperature sensor

92

Surface heating temperature sensor

93

panel heating

94

battery

95

microcontroller

96

switching element

Claims (9)

Folding bag (1) for receiving and heating an infusion bag (10), with the following features: a. the folding bag (1) has a first folding side part (20) and a second folding side part (40) which are connected to one another via a folding connection (30), b. in a folded position of the folding pocket (1), an inner side (21) of the first fold side part (20) and an inner side (41) of the second fold side part (40) face each other, c. on the inside (21) of the first folded side part (20) and on the inside (41) of the second folded side part (40) a surface heating (93) is arranged, i.e. A receiving pocket (50) for an infusion bag (10) is arranged between the inside (21) of the first folded side part (20) and the inside (41) of the second folded side part (40), e. An infusion bag temperature sensor (91) is arranged in the folding pocket (1) and rests against an infusion bag (10) in the folded position, f. the infusion bag temperature sensor (91) and the surface heating (93) are connected to a temperature controller (90) integrated in the folding bag (1), which is connected to a battery (94), G. the folding pocket (1) has a roll-up pocket (70) for receiving an infusion set, H. the roll-up pocket (70) is arranged on an outside of a folding side part (20, 40). Folding pocket (1) according to claim 1 , in which, in an unfolded position, the surface heating (93), which is arranged on the inside (21) of the first folded side part (20) and the inside (41) of the second folded side part (40), forms a plane. Folding pocket (1) according to claim 1 or 2 , which holds a balloon bag (60) in one of the first folded side parts (20) or second folded side part (40) and has a connection for connecting a pump bellows (61). Folding pocket (1) according to claim 3 , in which the temperature controller (90), the battery (94) and the pump bellows (61) are held on the outside of the other folding side part (20, 40). Folding bag (1) according to one of Claims 1 until 4 , in which the temperature controller (90) regulates the temperature measured by the infusion bag temperature sensor (91) to a target temperature which has a value between 30° C. and 42° Celsius. Folding bag (1) according to one of Claims 1 until 5 , in which the temperature controller (90) has a P component and an I component. Folding bag (1) according to one of Claims 1 until 6 wherein the temperature controller (90) is designed to turn itself on after the battery (94) is connected. Folding bag (1) according to one of Claims 1 until 7 , such that the temperature controller (90) is a digital controller, the infusion bag temperature sensor (91) is a digital sensor and the digital controller comprises a microcontroller (95) which applies pulse width modulating signals to an electronic switching element (96) which has a Circuit of battery (94) and surface heating (93) opens and closes. Folding pocket (1) according to claim 8 , in which an additional surface heating temperature sensor (92) is arranged on the surface heating (93), which is also a digital sensor and is also connected to the microcontroller (95), such that the microcontroller (95) at one of the surface heating temperature sensor (92) captured Tempe temperature of more than 50° C, a heating output is limited by pulse width modulation.

Images