EP1768550A1 - Verfahren und messgerät zur bestimmung des blutdrucks - Google Patents
Verfahren und messgerät zur bestimmung des blutdrucksInfo
- Publication number
- EP1768550A1 EP1768550A1 EP05758464A EP05758464A EP1768550A1 EP 1768550 A1 EP1768550 A1 EP 1768550A1 EP 05758464 A EP05758464 A EP 05758464A EP 05758464 A EP05758464 A EP 05758464A EP 1768550 A1 EP1768550 A1 EP 1768550A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- acceleration
- movement
- signals
- blood pressure
- 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.)
- Withdrawn
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording for evaluating the cardiovascular system, e.g. pulse, heart rate, blood pressure or blood flow
- A61B5/021—Measuring pressure in heart or blood vessels
- A61B5/022—Measuring pressure in heart or blood vessels by applying pressure to close blood vessels, e.g. against the skin; Ophthalmodynamometers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
- A61B5/6802—Sensor mounted on worn items
- A61B5/681—Wristwatch-type devices
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7203—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal
- A61B5/7207—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal of noise induced by motion artifacts
- A61B5/721—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal of noise induced by motion artifacts using a separate sensor to detect motion or using motion information derived from signals other than the physiological signal to be measured
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
- A61B2560/02—Operational features
- A61B2560/0242—Operational features adapted to measure environmental factors, e.g. temperature, pollution
- A61B2560/0247—Operational features adapted to measure environmental factors, e.g. temperature, pollution for compensation or correction of the measured physiological value
- A61B2560/0261—Operational features adapted to measure environmental factors, e.g. temperature, pollution for compensation or correction of the measured physiological value using hydrostatic pressure
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording for evaluating the cardiovascular system, e.g. pulse, heart rate, blood pressure or blood flow
- A61B5/024—Measuring pulse rate or heart rate
- A61B5/02438—Measuring pulse rate or heart rate with portable devices, e.g. worn by the patient
Definitions
- the present invention relates to a method for determining blood pressure and a blood pressure meter.
- US Pat. No. 5,778,879 therefore proposes a sphygmomanometer in which the inclination of the sphygmomanometer attached to the wrist is determined by means of an angle sensor, which is taken as a measure of the height of the sphygmomanometer relative to the heart. If the angle or the height is too high or too low, corresponding error messages are output. The operator of the sphygmomanometer should set the actual measuring process only when no more error message issued or the correct position of the sphygmomanometer relative to the heart is displayed.
- JP-A-7-143970 shows a sphygmomanometer, in which the height of the measuring device attached to the wrist is also determined and displayed relative to the heart via an inclination angle sensor.
- the height detection can be individually adapted to the user by the inclination angle sensor is adjustable in terms of its zero position, which corresponds to the correct positioning of the sphygmomanometer.
- JP-A-5-200004 furthermore shows a sphygmomanometer in which movements of the arm, to which the sphygmomanometer is attached, are detected by means of a acceleration sensor. If the detected movement or acceleration exceeds a predefined value, the actual measuring process is postponed until the movement or acceleration falls below the predetermined value. If necessary, the measurement is made again.
- Another blood pressure monitor is shown in WO 98/08429, in which the alignment, movement and acceleration of the limbs at which the blood pressure is measured are also recorded in parallel to the pressure measurement. The detected blood pressure should then be corrected in accordance with the detected movement. If too large movements are detected, which prevent an accurate determination of the blood pressure, the measurement is completely suppressed.
- a blood pressure measuring device is furthermore known in which a binding of the measurement or an indication of the low informational value of the measurement can be carried out before, during or after the measurement in the case of a defective measurement position.
- the present invention has for its object to provide an improved method and an improved measuring device for determining the blood pressure, avoid the disadvantages of the prior art and further develop the latter in an advantageous manner.
- an efficient feasibility of the measuring process should be achieved with high measuring accuracy and reproducibility.
- the alignment detection unit continuously or clock-wise with the signals of the pressure sensor provides an alignment signal indicating the position, movement and / or acceleration of the body member in the time points of the pressure measurements, that the evaluation unit, the pressure signals of Pressure sensor each individually associated with the associated alignment signals of the alignment detection unit and the pressure signals used only in dependence of the associated alignment signal for determining the blood pressure.
- the invention is based on the idea that at least four Zeit ⁇ points during the measurement or during the whole blood pressure measurement, ie during the detection of all pressure signals, the alignment of the body member is ein ⁇ eventually detects its movement and acceleration, not equal to the Whole blood pressure measurement is discarded if only to a certain extent data were taken while the limb was not kept in the correct position or not sufficiently quiet. It is individually decided for each pressure signal whether and how it is used for the determination of blood pressure.
- the blood pressure can indeed be determined precisely if only some of the measured values have been recorded under unfavorable conditions, but the sufficiently large remainder has been recorded at nominal conditions.
- a repeated cycle through the entire measuring routine is avoided (abortion of the measurement and restart), if only a brief, small jitter has occurred, for example, since the remaining measured values are sufficiently precise. Alternatively or additionally, it is indicated at least after the measurement, if the measurement was not performed at heart level, so that the user receives an indication of the low reproducibility of the measurement result.
- the evaluation unit may be configured such that the pressure signals, in which the position and / or movement and / or acceleration of the body member are not in predetermined target ranges, are ignored in the determination of the blood pressure, so that the blood pressure alone detected on the basis of the rest Pressure signals is determined, in which the position, movement and / or acceleration of the body member on which the measurement is made, were in the respective predetermined desired ranges.
- the singular hiding of pressure readings taken under unfavorable conditions considerably increases the accuracy and reproducibility of the measurement. At the same time, the loss of time is avoided, which is achieved by a complete, repeated passage through the whole measuring routine would be caused.
- the evaluation unit is assigned a memory in which the pressure signals and the associated alignment signals, which represent the position, movement and / or acceleration of the limb, are first stored, so that the evaluation unit reads out the values correspondingly when determining the blood pressure can. It can be provided that the pressure signals recorded outside the position, movement or acceleration tolerance ranges are not written into the memory at all. The timely evaluation of the pressure signals with regard to their recording conditions reduces the amount of data to be processed later in the determination of the blood pressure from the pressure signals.
- the pressure signals detected on the limb are further processed in different ways.
- One method is that of oscillometry, in which the intensity of the arterial pulsations is determined from the pressure signals. For each of these pulsations, it is calculated which pressure was applied to the body member when the strength of the arterial pulsation at the wrist was registered.
- the measuring device was kept at heart level at the time of occurrence of the respective pulsation and / or was kept at heart level during a time interval which should include the time of occurrence of the pulsation and / or has moved at the time of occurrence of the pulsation, so that at the appropriate time it may have only been at cardiac level at random and / or has moved too much during a time interval which should include the time of occurrence of the pulsation, so that with a certain probability it was not at heart level or motion artifacts disturbed the pressure signal.
- accelerations of the blood pressure measuring device are present or exceed a certain size, which can be generated not only by relative movements of the arm to the body but also by total movements of the entire body and the measurement result in FIG same way negative influence.
- the sphygmomanometer comprises a display device for displaying the respectively detected position, movement and / or acceleration of the body member or a variable derived therefrom.
- the display is preferably carried out essentially at the same time or only with a slight time offset to the detection of the position, movement or acceleration of the body member, and advantageously also during the measurement process.
- the display device gives a feedback signal, which corresponds to the user's The meter indicates whether it is holding the limb properly, or preferably, how to hold the limb better.
- this simultaneous or timely display has great advantages, as can be saved by correspondingly rapid response of the user of the meter, the measurement series.
- a corresponding feedback signal is displayed after the measurement.
- the orientation measured values recorded during the entire measuring cycle are used not only for the evaluation of the pressure signals, but also for the control of the measuring sequence for the detection of said pressure signals.
- the body member is subjected to a changing pressure by means of a pressure cuff when detecting the pressure signals.
- the sphygmomanometer comprises a measurement sequence control which controls the pressure change cycle to which the body member is subjected as a function of the respectively detected position, movement and / or acceleration of the body member.
- a pressure change provided in the predetermined pressure change cycle can be interrupted and / or shifted in time if the position, movement and / or acceleration of the body member lies outside predefined limit values.
- the interrupted pressure change cycle is resumed or continued.
- the pressure change can again be approached with the pressure value which was predetermined before leaving the setpoint range of position, movement or acceleration of the limb. This ensures that each section of the pressure change cycle is fully traversed under setpoint conditions, i. the pressure signals are recorded at any time during the pressure change cycle in the correct position and / or only sufficiently small movements or accelerations.
- the measurement sequence control also includes a time recording, specifically the time duration within which the detected position, movement or acceleration values of the body member lie outside the respectively predetermined desired ranges. If this time duration exceeds a predetermined limit value, the measurement process control provides for a termination of the measurement cycle. This ensures that no excessive interruptions of a measurement cycle can occur, which can cause an inaccuracy of the measurement results.
- FIG. 1 shows a sphygmomanometer according to a preferred embodiment of the invention, which is attached to a wrist of a person, in a schematic representation, FIG.
- Figure 2 shows the structure of the sphygmomanometer of Figure 1 in a schematic
- FIG. 3 shows a flow chart of a measuring sequence with checking of the measuring position and of movement artefacts during the occurrence of arterial pulsations
- FIG. 4 shows a graph of the arterial pulsations over the cuff pressure, the angle of inclination of the forearm recorded at the same time being plotted in the diagram, and
- FIG. 5 is a flowchart of a measuring procedure with direct intervention in the measuring procedure when leaving the optimum measuring position and / or the occurrence of undesired motion artifacts.
- the sphygmomanometer shown in FIG. 1 is designed to measure the blood pressure at the wrist.
- the wrist is moved directly along the upper body (in front of the chest) in order to find a measuring position at heart level under the guidance of the blood pressure measuring device.
- a contact unit it has a collar 1 with which a pressure for signal recording can be applied to a body member, in particular to the inside of the left hand joint or to the forearm.
- the cuff 1 has a bladder which can preferably be inflated with air in order to determine the diastolic, the systolic, possibly the mean blood pressure and the pulse during the release of air by means of the oscillometric measuring method.
- the landing unit is in fluid communication with a pressure sensor 2 disposed in a blood pressure meter housing 100 fixed to the applying unit 1.
- the pressure sensor 2 (FIG. 2) can be designed, for example, as a capacitive or piezoresistive sensor.
- the Blutdruckmeßtechnikgephaseuse has all other usual and partly listed below components of a blood pressure meter.
- the pressure sensor 2 is connected via an amplifier and analog / digital converter 3 to a central control and evaluation unit 4, which may be e.g. is designed as a microcontroller or as a digital signal processor and is provided for the algorithmic evaluation of the electrical signal of the pressure sensor 2 and for controlling a pressure control device 5 connected to the cuff 1.
- a central control and evaluation unit 4 which may be e.g. is designed as a microcontroller or as a digital signal processor and is provided for the algorithmic evaluation of the electrical signal of the pressure sensor 2 and for controlling a pressure control device 5 connected to the cuff 1.
- the sphygmomanometer further comprises an alignment sensor 6, which may also be designed as an amplifier via a signal conditioning unit and the analog / digital converter 3 is connected to the control and evaluation unit 4.
- the alignment sensor 6 provides a signal which makes the position of the sphygmomanometer relative to the heart, its movement and acceleration determinable or derivable.
- the Aus ⁇ direction sensor 6 may be formed as a tilt sensor, which detects the inclination of the Man ⁇ cuff 1 and thus the wrist or forearm with respect to the horizontal, i. provides an electrical signal corresponding to the angle of inclination u of the wrist to the horizontal (see Figure 1).
- It may preferably have a movably mounted part such as a pendulum and be provided with a device with which the inclination angle u, the speed and the acceleration of the movable part is electrically detectable.
- the speed and the acceleration can be detected for example by the electronic generation of the first and second derivative of the tilt signal.
- the control and evaluation unit 4 initiates a measurement procedure.
- the user is guided by means of arrow symbols or other display means on the display device of the Bluttikmeß ⁇ device in a position at heart level.
- the control and evaluation unit 4 controls the pressure control device 5 accordingly, so that the cuff 1 is first inflated to pressurize the wrist. Then, the air in the bubble of the cuff 1 is released again to lower the pressure.
- Hier ⁇ through a predetermined pressure change cycle is passed. In this case, pressure signals are detected at pre-given times with the pressure sensor 2, which signals the arterial pulsation. tion correspond.
- the pressure cycle is optionally started from the beginning (see FIG. Alternatively, the blood pressure is measured simultaneously during the pressurization, that is to say during the inflation process of the cuff bladder. Thereafter, the pressure is quickly released from the sleeve without further measurements.
- FIG. 4 shows with the points of the graph 7 the detected pressure signals which are plotted against the pressure in the cuff 1.
- the alignment sensor 6 During the entire detection of the pressure signals is detected by means of the alignment sensor 6, whether the sphygmomanometer respectively the wrist is held in the intended position, approximately at the level of the heart.
- the alignment signals of the alignment sensor 6, which can correspond to the angle of inclination u, are detected simultaneously with the corresponding pressure signals, so that it can be determined for each pressure signal whether the prescribed position has been maintained.
- the second graph 8 shows the detected inclination angle signals approximately at the times of the respective pressure signals.
- an upper limit value 9 and a lower limit value 10 are entered for the angle of inclination.
- the first five measuring points of the inclination angle are outside the intended target range, which lies between the two limit values 9 and 10.
- the corresponding pressure signals of the graph 7 were thus detected at times when the wrist was not kept in the correct position. They are not used for evaluation and determination of blood pressure.
- FIG. 4 shows, only the part of the graph 7 drawn with a thick line is used to determine the blood pressure, since the wrist and respectively the sphygmomanometer were correctly held only for the pressure signals which support the course of this graph section.
- the control and evaluation unit 4 determines the blood pressure only from the pressure signals in which the angle of inclination, its derivative and its second derivative are within predefined desired ranges.
- the control and evaluation unit 4 may make the user aware of the correct measurement position via the associated display device 11 of the user. This can be done spieltagen by a request to hold the wrist higher or keep the wrist quiet. By a corresponding display on the display device 11, the number of pressure signals that are to be respected for the later determination of the blood pressure, can be reduced.
- the control and evaluation unit 4 can already influence the measurement sequence, in particular the pressure change cycle and the pressure signal detection, during the detection of a wrong measurement attitude or unwanted motion artifacts.
- this continuous change can be interrupted.
- the ventilation and / or the venting process can be stopped, which can be accomplished by closing a valve or stopping the pump. This gives the user time to correct the measurement attitude, which is advantageously controlled accordingly by the display device 11. If the measuring position is correct again and if the correct measuring position has been maintained for a certain period of time, the continuous pressure change and thus the normal measuring process are continued with the detection of the pressure signals.
- control and evaluation unit 4 can not drive the next pressure stage until the measurement position is correct and no unwanted movement artefacts can be detected.
- the interruption of the normal pressure change cycle can in both cases be such that the pressure applied to the wrist is reduced to a value which existed at a time which has prevailed a certain time before leaving the correct measurement position or before the motion artifacts .
- the valve can be opened for a certain time and / or the pump can be switched off.
- the display device 11 not only indicates that the intended measuring position has been left or unwanted movement artefacts have occurred, but also that the regular pressure change cycle has not yet been interrupted and the user has returned to it. As a result, the user knows that the measurement continues.
- the manner in which the user is made aware of leaving the regular pressure change cycle and the need for his own measures for the purpose of a renewed achievement of the intended measurement position or the elimination of motion artifacts may vary. This can be accomplished acoustically via a buzzer or similar, then sensory, for example by vibration by means of a pump or valve, and finally visually, for example, via a display, colored LEDs, arrow symbols, etc.
- the user receives via the validation display during the blood pressure measurement and / or after or after discontinuation of the blood pressure measurement due to deficient position (too large deviation from the heart height), movement (strong movement away from the Herz ⁇ height) and / or acceleration (eg trembling during the measurement) of the wrist with sphygmomanometer, a feedback as to whether the blood pressure measurement is valid, ie useful or invalid and therefore useless.
- a torso displayed on the display on which, for example, a forearm is shown in an elevated position if the measuring position was too high in one phase of the blood pressure and inclination measurement.
- a lower forearm e.g., lower forearm relative to forearm at normal heart level
- arrows or other symbols or display means can give accurate feedback on the measurement errors.
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Veterinary Medicine (AREA)
- Biophysics (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- Physics & Mathematics (AREA)
- Public Health (AREA)
- Pathology (AREA)
- Vascular Medicine (AREA)
- Cardiology (AREA)
- Physiology (AREA)
- Signal Processing (AREA)
- Ophthalmology & Optometry (AREA)
- Artificial Intelligence (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Psychiatry (AREA)
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102004032579A DE102004032579A1 (de) | 2004-07-05 | 2004-07-05 | Verfahren und Messgerät zur Bestimmung des Blutdrucks |
| PCT/EP2005/006980 WO2006002881A1 (de) | 2004-07-05 | 2005-06-29 | Verfahren und messgerät zur bestimmung des blutdrucks |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1768550A1 true EP1768550A1 (de) | 2007-04-04 |
Family
ID=34982203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP05758464A Withdrawn EP1768550A1 (de) | 2004-07-05 | 2005-06-29 | Verfahren und messgerät zur bestimmung des blutdrucks |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20090012409A1 (de) |
| EP (1) | EP1768550A1 (de) |
| DE (1) | DE102004032579A1 (de) |
| WO (1) | WO2006002881A1 (de) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008080399A1 (en) * | 2007-01-04 | 2008-07-10 | Sense A/S | A system for measuring blood pressure in an artery |
| WO2009090646A2 (en) * | 2008-01-15 | 2009-07-23 | Intercure Ltd. | Determination of physiological parameters using repeated blood pressure measurements |
| JP5211910B2 (ja) * | 2008-07-23 | 2013-06-12 | オムロンヘルスケア株式会社 | 生体情報管理システム及び測定器 |
| JP5200903B2 (ja) * | 2008-12-08 | 2013-06-05 | オムロンヘルスケア株式会社 | 電子血圧計 |
| FI20145128L (fi) * | 2014-02-10 | 2015-08-11 | Murata Manufacturing Co | Varhainen akuutin kaatumisriskin havaitseminen |
| TWI601033B (zh) * | 2014-07-08 | 2017-10-01 | 拓連科技股份有限公司 | 移動偵測之管理方法及系統,及相關電腦程式產品 |
| JP6750198B2 (ja) * | 2015-09-03 | 2020-09-02 | オムロンヘルスケア株式会社 | 血圧測定装置、身体特徴情報算出方法、身体特徴情報算出プログラム |
| JP6164309B2 (ja) * | 2016-01-04 | 2017-07-19 | オムロンヘルスケア株式会社 | 機器 |
| JP6925830B2 (ja) * | 2017-03-15 | 2021-08-25 | オムロン株式会社 | 生体情報記録装置、システム、方法及びプログラム |
| JP2020156749A (ja) * | 2019-03-26 | 2020-10-01 | シチズン時計株式会社 | 血圧計、方法、及びプログラム |
| CN113349747B (zh) * | 2020-03-04 | 2023-02-03 | 华为技术有限公司 | 血压的测量方法、装置和血压测量设备 |
| US20250366726A1 (en) * | 2024-06-03 | 2025-12-04 | K-Jump Health Co., Ltd. | Wrist blood pressure measuring device |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH084574B2 (ja) * | 1987-05-13 | 1996-01-24 | オムロン株式会社 | 電子血圧計 |
| JPH05200004A (ja) * | 1992-01-28 | 1993-08-10 | Matsushita Electric Works Ltd | 血圧計 |
| JP3363224B2 (ja) * | 1993-11-25 | 2003-01-08 | 松下電工株式会社 | 手首血圧計 |
| JPH08215161A (ja) * | 1995-02-16 | 1996-08-27 | Omron Corp | 電子血圧計 |
| JP3297971B2 (ja) * | 1995-02-16 | 2002-07-02 | オムロン株式会社 | 電子血圧計 |
| WO1998008429A1 (en) | 1996-08-30 | 1998-03-05 | The Whitaker Corporation | Apparatus to flex a bendable probe |
| DE19757974A1 (de) * | 1997-12-24 | 1999-07-15 | Braun Gmbh | Verfahren und Meßgerät zur Bestimmung des Blutdrucks |
| JP4503732B2 (ja) * | 1999-08-05 | 2010-07-14 | 積水化学工業株式会社 | 不断水分岐継手 |
| DE19963633A1 (de) * | 1999-12-29 | 2001-07-12 | Braun Gmbh | Blutdruckmeßgerät mit Neigungssensor |
| CN1256913C (zh) * | 2000-11-14 | 2006-05-24 | 欧姆龙健康医疗事业株式会社 | 电子血压计 |
| DE10246255A1 (de) * | 2002-10-02 | 2004-04-22 | Braun Gmbh | Verfahren zur Blutdruckmessung und Blutdruckmeßgerät mit Benutzerführung |
| US7429245B2 (en) * | 2003-07-14 | 2008-09-30 | Welch Allyn, Inc. | Motion management in a fast blood pressure measurement device |
-
2004
- 2004-07-05 DE DE102004032579A patent/DE102004032579A1/de not_active Withdrawn
-
2005
- 2005-06-29 WO PCT/EP2005/006980 patent/WO2006002881A1/de not_active Ceased
- 2005-06-29 US US11/631,717 patent/US20090012409A1/en not_active Abandoned
- 2005-06-29 EP EP05758464A patent/EP1768550A1/de not_active Withdrawn
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2006002881A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US20090012409A1 (en) | 2009-01-08 |
| DE102004032579A1 (de) | 2006-02-09 |
| WO2006002881A1 (de) | 2006-01-12 |
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