EP0555652B1 - Gekoppelte Steuerung von Betriebsparametern eines Inkubators - Google Patents

Gekoppelte Steuerung von Betriebsparametern eines Inkubators Download PDF

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Publication number
EP0555652B1
EP0555652B1 EP93100524A EP93100524A EP0555652B1 EP 0555652 B1 EP0555652 B1 EP 0555652B1 EP 93100524 A EP93100524 A EP 93100524A EP 93100524 A EP93100524 A EP 93100524A EP 0555652 B1 EP0555652 B1 EP 0555652B1
Authority
EP
European Patent Office
Prior art keywords
value
incubator
parameter
circuit
values
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP93100524A
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German (de)
English (en)
French (fr)
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EP0555652A1 (de
Inventor
Jochim Dr. Koch
Stefan Dr. Frembgen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Draegerwerk AG and Co KGaA
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Draegerwerk AG and Co KGaA
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Publication of EP0555652A1 publication Critical patent/EP0555652A1/de
Application granted granted Critical
Publication of EP0555652B1 publication Critical patent/EP0555652B1/de
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G11/00—Baby-incubators; Couveuses
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G2203/00—General characteristics of devices
    • A61G2203/30—General characteristics of devices characterised by sensor means
    • A61G2203/46—General characteristics of devices characterised by sensor means for temperature

Definitions

  • the invention relates to a method for controlling the operating parameters determining the heat balance of a premature or newborn in an incubator, which include at least the incubator temperature and the humidity to be set in the interior of the incubator, of which the actual values are compared with their associated target values and new setpoints are set for the parameters in the event of a deviation.
  • the purpose of controlling the operating parameters of an incubator is always to determine the ambient conditions for a premature or newborn in the interior of the incubator in such a way that the body loses as little heat as possible from the environment. Maintaining a heat balance necessary for the well-being of the patient means an increased effort for the patient, which is to be reduced by the ambient conditions in the incubator.
  • Essential parameters for maintaining the desired ambient conditions are: Incubator air temperature to avoid convection heat losses, surface temperatures of the incubator hood or the lying surface to avoid temperature losses via heat conduction or heat radiation, and very significantly the moisture content of the incubator air temperature. It is also important to provide the patient with sufficient oxygen to support the heat-producing metabolic balance.
  • the change in one parameter also affects the influence of another parameter on the thermal balance of the premature or newborn.
  • the increase in the incubator air temperature means a reduction in the relative humidity in the incubator air, which increases the possibility of evaporation of the patient's body to the environment and thus to it Evaporation heat is removed.
  • a lowering of the incubator air temperature means an increase in the relative air humidity, so that, despite the low incubator air temperature, the body temperature of the patient may even be increased, since the possibility of giving off heat of evaporation is reduced.
  • it may be necessary that the necessary oxygen supply is reduced with an increased incubator air temperature and corresponding heating of the body core temperature.
  • the present invention is therefore based on the object of improving a method of the type mentioned in such a way that when the parameters determining the climate in the room of the premature and newborns are taken into account, their functional relationships which optimize the heat balance are also taken into account without complex multiple settings for the Individual parameters are necessary.
  • a mother control loop for controlling a first parameter gives the associated actual value or setpoint as a guide value to a link generator, by means of which a link value is determined by means of a link circuit which is forwarded to a daughter circuit for setting the setpoint of a second parameter becomes.
  • the control circuit for regulating the incubator air temperature to a predefined setpoint value and the circuit for setting the incubator air humidity the user only needs to set the desired incubator temperature, as a result of which the associated setpoint value for the Setting the incubator humidity is set.
  • the logic circuit in the logic generator determines the functional relationship between the setpoint or actual value of one parameter and the setpoint of the second parameter.
  • the setting of only one parameter for example incubator air temperature
  • the setting of only one parameter thus has a favorable influence on another, for the heat balance of the early and Newborn in the incubator relevant second parameter (eg humidity).
  • the indirect setting of several parameters by coupling a link generator enables the parameters to be adapted to the physiological conditions of the patient in the incubator.
  • the incubator inner wall temperature or the bed surface temperature and the flow rate of the incubator air temperature can also be used as the first parameter for the mother control loop.
  • Both the actual value and the setpoint of the first parameter can be used as a reference value. If the actual value is selected as the reference value for the linkage generator, it is possible to quickly adapt the second parameter to the current status values of the incubator control. This is particularly favorable for the control of parameters whose associated control or switching circuits have a short time constant. On the other hand, it is favorable to select the setpoint of the first parameter as a guide value for the logic generator if parameters are controlled, the associated control or switching circuits of which have a long time constant.
  • the corresponding air humidity is selected via the link function by appropriate specification or setting of the incubator temperature and passed on to the circuit for setting the incubator air humidity.
  • a new assigned setpoint for the incubator air humidity is determined via the linking function and passed on to the circuit.
  • the mode of operation of the control loop, logic generator and circuit can just as well lead to success if, for example, the incubator humidity parameter is used as an adjustable control variable, according to which an associated incubator air temperature can be set using the linking function.
  • the coupled adjustable operating parameters reflect the physiological conditions with regard to the Should take into account the heat balance of premature and newborns, it is advisable to adapt the functional relationship between the operating parameters to be linked to personal selection parameters based on experience. For example, an older newborn or one with a higher birth weight needs less humidity at a given incubator air temperature than a patient with a lower weight and younger age, because the skin surface evaporates less body fluid due to its more mature formation and thus loses less heat of evaporation. It can therefore be in a drier atmosphere.
  • the stored values are stored in a multidimensional table form in which a dimension level is determined by the parameter assignment of temperature and humidity, over which a third and possibly a further dimension is laid, which is determined by one or another personal selection variable, and that by defining the third and further dimensions by entering the selection variables, a multidimensional linking function corresponding to this dimension is selected.
  • a dimension level is determined by the parameter assignment of temperature and humidity, over which a third and possibly a further dimension is laid, which is determined by one or another personal selection variable, and that by defining the third and further dimensions by entering the selection variables, a multidimensional linking function corresponding to this dimension is selected.
  • the simplest form of the table is that a two-dimensional assignment of temperature and air humidity is established for the standard values of personal selection variables, such as age, birth weight, gestational age, are fixed in the link generator.
  • the user can leave this standard level defined by entering other personal selection parameters and select a link function that is adapted to the changed selection parameters.
  • the daughter circuit as a second control circuit by connecting an actual value transmitter for the second parameter to the circuit and comparing the actual value with the setpoint value supplied by the logic generator. If the two values differ, the setting is changed. In this way, two coupled control loops are obtained for different operating parameters, which operate as master-slave control loops, so to speak:
  • the first control loop determines the setpoint of the second control loop via a link generator.
  • the linking function In order to limit the control or regulation of the coupled operating parameters to the values that are favorable for the warmth balance of the premature and newborn babies, it is appropriate to provide upper and / or lower limit values for the linking function. If the operating point exceeds the respective upper or lower limits, only the leading value of the first parameter can be changed without the subsequent value being changed.
  • the incubator air temperature as a guide value and the humidity as a follow-up value in a Cartesian Coordinate system, where the incubator temperature is the independent variable and the incubator humidity is the dependent variable, the linking function extends beyond the upper and lower limit values in a horizontal direction.
  • a shift in the operating point as a result of a change in the actual value or setpoint of the incubator air temperature then means no change in the associated incubator air humidity.
  • the circuit breaker can be located at a point in the power train which is expedient due to the circuit between the control circuit for the first parameter and the circuit or control circuit for the second parameter.
  • An incubator for carrying out the method for the coupled control of operating parameters has an enclosed lounge for the premature or newborn, in which a lying surface is provided, and an aggregate room in which a fan for circulating the lounge air heated by a heater and moistened by a humidification device is arranged is.
  • the incubator air temperature is set and maintained using a temperature control loop.
  • the humidification device is connected to a circuit for setting the moisture to be released through it into the lounge air.
  • the control circuit for the incubator air temperature is connected to a link generator, which receives the actual value or setpoint relevant for the control loop as a guide value and is connected to the circuit to deliver a subsequent value determined from the guide value via a link function to the circuit. The subsequent value influences the control of the humidification device as a setpoint.
  • the circuit for setting the incubator humidity can be easily completed to form a control circuit by connecting a humidity sensor to the circuit and forwarding the actual value to it.
  • the setting of the humidification device to achieve the desired value is influenced by comparison between the desired value and the actual value and, if there is a corresponding deviation.
  • an interrupter switch is arranged in the cable between the control circuit, logic generator, and circuit.
  • the humidity sensor (10) can be removed, and the circuit, depending on the preselected temperature, sets the humidification heater (19) to predetermined heating levels, which are divided into ten equal parts from minimum to maximum, the one correspond relative humidity of, for example, 35 to 85%.
  • the link generator (14) only the association between air temperature and heating levels is then related.
  • the 2 shows a functional relationship between the incubator air temperature T and the incubator air humidity H.
  • the parameter range of temperature T ranges from 28 ° C to 39 ° C
  • the parameter range of humidity H ranges from 25% relative humidity to 85% relative humidity.
  • the linking function (15) is defined for a patient (3) located in the incubator (1) in accordance with the personal selection data entered via the input unit (21). Accordingly, the working point A is set at a selected incubator air temperature of 36 ° C, to which a relative air humidity of 78% belongs.
  • This moisture value is given by the link generator (14) as a follow-up value via the line (16) to the daughter circuit (17) and processed there as a setpoint for the setting of the humidification device (8).
  • An upper limit (HI) for the incubator air temperature is 37 ° C, above which an unchanged relative humidity of 85% remains set. If the temperature falls below a lower limit (LO) at 30.5 ° C, the set relative humidity remains constant at 35%. If other personal selection data are entered in the input unit (21), for example for a very small premature baby, a linking function (115) is selected, which is defined along the dashed line. The relative humidity to be set rises more steeply with increasing incubator air temperature and already reaches the upper limit (G) at around 34.7 ° C.

Landscapes

  • Health & Medical Sciences (AREA)
  • Gynecology & Obstetrics (AREA)
  • Pediatric Medicine (AREA)
  • Pregnancy & Childbirth (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Accommodation For Nursing Or Treatment Tables (AREA)
EP93100524A 1992-02-14 1993-01-15 Gekoppelte Steuerung von Betriebsparametern eines Inkubators Expired - Lifetime EP0555652B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4204398A DE4204398C1 (enrdf_load_stackoverflow) 1992-02-14 1992-02-14
DE4204398 1992-02-14

Publications (2)

Publication Number Publication Date
EP0555652A1 EP0555652A1 (de) 1993-08-18
EP0555652B1 true EP0555652B1 (de) 1995-06-07

Family

ID=6451694

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93100524A Expired - Lifetime EP0555652B1 (de) 1992-02-14 1993-01-15 Gekoppelte Steuerung von Betriebsparametern eines Inkubators

Country Status (4)

Country Link
US (1) US5316542A (enrdf_load_stackoverflow)
EP (1) EP0555652B1 (enrdf_load_stackoverflow)
JP (1) JPH07108310B2 (enrdf_load_stackoverflow)
DE (2) DE4204398C1 (enrdf_load_stackoverflow)

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6709384B1 (en) 1993-12-17 2004-03-23 Hill-Rom Services, Inc. Infant thermal support device
US5759149A (en) 1993-12-17 1998-06-02 Hill-Rom, Inc. Patient thermal support device
US5817003A (en) * 1993-12-17 1998-10-06 Hill-Rom, Inc. Controller for a patient warming device
JPH09234226A (ja) * 1996-02-29 1997-09-09 Atom Medical Kk 保育器
GB2346560B (en) * 1996-08-27 2001-02-14 Air Shields Infant incubator
US5730355A (en) * 1996-08-27 1998-03-24 Air-Shields, Inc. Infant incubator
DE19725498C1 (de) * 1997-06-17 1998-10-15 Draegerwerk Ag Inkubator für Kleinkinder
US5957830A (en) * 1997-08-25 1999-09-28 Skulic; Vedran Active air sampling temperature sensor module for infant incubator
BE1011522A3 (fr) * 1997-10-30 1999-10-05 Gysens Lucien Dispositif de phototherapie multidirectionelle intensive.
US6036633A (en) * 1998-01-30 2000-03-14 Datex-Ohmeda, Inc. Dual incubator temperature control system
FR2777420B1 (fr) * 1998-04-16 2000-05-05 Air Liquide Procede pour ameliorer les conditions d'elevage chez le porc nouveau-ne
FR2777775B1 (fr) * 1998-04-24 2000-06-16 Hemocare Procede de controle de fonctionnement d'un dispositif de maintien du corps d'un etre vivant a au moins une temperature determinee
DE10010720B4 (de) * 1999-05-03 2004-12-23 Dräger Medical AG & Co. KGaA Behandlungseinheit für die Intensivpflege und Verfahren zur Steuerung der Wärmezufuhr
WO2001043686A2 (en) 1999-11-15 2001-06-21 Hill-Rom Services, Inc. Infant care apparatus with movable infant support
US6880188B1 (en) 1999-11-15 2005-04-19 Draeger Medical Infant Care, Inc. Infant care apparatus with movable infant support
KR100367908B1 (ko) * 2000-06-01 2003-01-14 주식회사 피앤엠 지능형 인큐베이터 시스템 및 그 제어방법
EP1343448B1 (en) 2000-12-22 2008-09-24 Draeger Medical Systems, Inc. Incubator with humidity sensor
DE10114684C2 (de) * 2001-03-23 2003-10-23 Kendro Lab Prod Gmbh Verfahren zur Feuchteerzeugung in einem Brutschrank
JP2003153968A (ja) * 2001-11-22 2003-05-27 Hajime Ogata 保育器
JP5340739B2 (ja) * 2005-12-01 2013-11-13 ハイドレイト、インコーポレイテッド インライン式気化器
US7442163B2 (en) * 2005-12-22 2008-10-28 General Electric Company Humidification control system for infant care apparatus
US7748623B2 (en) * 2006-11-08 2010-07-06 Battelle Memorial Institute Container screener
US8033281B2 (en) * 2007-11-09 2011-10-11 Todd Douglas Kneale Modular transportable life support device
US7818840B2 (en) 2007-11-09 2010-10-26 Integrated Medical Systems, Inc. Foldable, portable trauma treatment and monitoring patient platform
JP5987003B2 (ja) 2011-01-07 2016-09-06 コーニンクレッカ フィリップス エヌ ヴェＫｏｎｉｎｋｌｉｊｋｅ Ｐｈｉｌｉｐｓ Ｎ．Ｖ． インキュベーターアセンブリ及び絶対湿度を制御する関連の制御装置
EP2661247B1 (en) 2011-01-07 2015-03-18 Koninklijke Philips N.V. Incubator assembly and associated control apparatus that controls humidity rate
EP3664599A4 (en) * 2017-08-08 2021-05-05 Pendram, Inc. SYSTEM AND METHOD FOR STORAGE OF PERISHABLE OBJECTS
DE102017010801A1 (de) 2017-11-22 2019-05-23 Drägerwerk AG & Co. KGaA Verfahren zur berührungslosen Hauttemperaturbestimmung und Vorrichtung zur Ausführung des Verfahrens

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US4034740A (en) * 1974-05-22 1977-07-12 Atherton Harry D Temperature controlling methods and apparatus
GB2045978B (en) * 1979-03-27 1983-01-26 Eme Electro Medical Equip Temperature monitoring
IL75215A (en) * 1985-05-16 1992-07-15 Israel Atomic Energy Comm Infant incubator
JPS6319144A (ja) * 1986-07-11 1988-01-26 アトム株式会社 保育器
JPH0618592B2 (ja) * 1986-07-17 1994-03-16 アトム株式会社 保育器における温度制御方法
DE3930363A1 (de) * 1989-09-12 1991-03-21 Draegerwerk Ag Verfahren zur steuerung der betriebsparameter eines inkubators
DE4103801C2 (de) * 1991-02-08 1997-03-27 Draegerwerk Ag Verfahren zur Temperaturregelung eines Inkubators

Also Published As

Publication number Publication date
EP0555652A1 (de) 1993-08-18
DE59300238D1 (de) 1995-07-13
US5316542A (en) 1994-05-31
JPH05337156A (ja) 1993-12-21
DE4204398C1 (enrdf_load_stackoverflow) 1993-06-24
JPH07108310B2 (ja) 1995-11-22

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