CN100346742C - Method and system for non-invasive detecting intra-abdominal pressure - Google Patents
Method and system for non-invasive detecting intra-abdominal pressure Download PDFInfo
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- CN100346742C CN100346742C CNB2004100091666A CN200410009166A CN100346742C CN 100346742 C CN100346742 C CN 100346742C CN B2004100091666 A CNB2004100091666 A CN B2004100091666A CN 200410009166 A CN200410009166 A CN 200410009166A CN 100346742 C CN100346742 C CN 100346742C
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Abstract
The present invention relates to a method and a system for non-invasive intra-abdominal pressure measurement, which belongs to the field of medicine measurement. The present invention is characterized in that a pressure-displacement sensor combination is composed of a pressure sensor and a displacement sensor; a data measuring and processing system is used for measuring the output voltage variation of the pressure sensor produced during the change of the ventrolateral pressure; then, an intra-abdominal pressure value is calculated through an intra-abdominal pressure and ventrolateral pressure conversion formula obtained by a mathematic fitting method through the acquisition data of clinical experiments. The present invention has the advantages of no invasion and convenient clinical application. The present invention also provides a corresponding hardware structure for non-invasive intra-abdominal pressure measurement.
Description
Technical field
Intra-abdominal pressure noinvasive detection method and system thereof belong to medical measuring method and device field, are mainly used in the indirect non-invasive measurement of intra-abdominal pressure.
Background technology
Abdominal cavity compartment syndrome (ACS) is defined as the formed a kind of clinical syndrome of a series of pathophysiological changes of abdominal cavity intrinsic pressure rapid rising causing.Can be divided into acute ACS and chronic ACS (as tumor, ascites, gestation) according to intra-abdominal pressure rising speed and course of disease progress, the ACS of indication all is acute ACS clinically, often betides after the wound or abdominal postoperative.When intra-abdominal pressure sharply is increased to a certain degree, take measures as untimely, will cause damage to a plurality of organs such as lung, kidney and hearts, even can cause a plurality of organ failuries so that shock and dead.
At present, the abdominal cavity decompression is the unique method to the ACS treatment, and operation is very big to the influential effect of abdominal cavity decompression opportunity, therefore, determines that best operating time seems particularly important, and this just requires correctly, in time to understand and to follow the tracks of the patient's condition of ACS.Because the size of intra-abdominal pressure (IAP) and variation can accurately reflect the situation of ACS, adopt it to judge and determine the important indicator of operating time as the patient's condition clinically always.
The measuring method of intra-abdominal pressure can be divided into direct pressure measurement and indirect two kinds of methods of pressure measurement at present.The former directly puts pipe in intraperitoneal, connects pressure transducer then, or in laparoscopic surgery by pneumoperitoneum apparatus to the abdominal pressure continuous monitoring.Manometry is to reflect intra-abdominal pressure indirectly by measuring postcava pressure, intragastric pressure and intravesical pressure indirectly.
Though press whether to reflect exactly that the abdominal cavity is intrinsic pressure still disputable for bladder at present, wherein because the cystometry method is relatively accurate, simple and damaging less, therefore as an objective indicator, bladder is pressed in intra-abdominal pressure and uses in measuring the most general.At first by proposition and descriptions such as Kron, measuring method is very simple, patient's dorsal position for this method, drainage tube is connected with the Foley catheter, injects the 50ml isotonic saline solution, connect hydraulic pressure gauge by threeway then to intravesical, with the pubic symphysis is zero plane, and water-column is intra-abdominal pressure.
Clinically, belong to Wicresoft though measure the process of bladder pressure, but it still can cause certain injury to outpatients mental state, physiology, even may cause and infect or needle stick injury, cause adverse consequences, therefore, study and seek a kind of accurately and noninvasive intra-abdominal pressure measuring method is very necessary, have important scientific meaning and wide practical value.
Summary of the invention
The object of the present invention is to provide a kind of intra-abdominal pressure noinvasive detection method and device, it is by the functional relationship between abdomen external pressure, displacement and the intra-abdominal pressure, calculate the numerical value of intra-abdominal pressure from the measurement result of abdomen external pressure, thereby the noinvasive of realizing intra-abdominal pressure indirectly detects, and can alleviate patient and doctor's burden greatly.
Consider pressure transducer and displacement transducer are rationally assembled, can realize the proportional relation between pressure and the displacement, if stepping is carried out in displacement, utilize this pressure-displacement sensor device just can record abdomen external pressure under the certain displacement so, and there is dependency between these data and the intra-abdominal pressure, if set up the functional relationship between this two, we just can obtain the numerical value of intra-abdominal pressure by outer abdominal pressure measured value indirectly by this functional relationship, thereby really realize the non-invasive measurement of intra-abdominal pressure.If under the situation of fixed displacement, measure the variation of abdomen external pressure, perhaps under the situation of fixing abdomen external pressure, measure the variation of displacement, then all can obtain the state of development of intra-abdominal pressure, thereby assurance is carried out real-time tracking to patient's patient's condition.
Method of the present invention is characterized in that: it contains following steps successively:
(1) to the sampled data and the following abdomen external pressure-intra-abdominal pressure conversion formula of computer input abdomen external pressure:
y＝ax+b
Wherein, x is the abdomen external pressure, and y is an intra-abdominal pressure, and a, b are respectively undetermined coefficient, and for the pressure-displacement transducer of different model, the occurrence of a, b can be tried to achieve by the method for data fitting in advance;
(2) adopt the pressure-displacement transducer combination that constitutes by pressure transducer and displacement transducer mechanical connection, measure the abdomen external pressure more according to the following steps:
(2.1) end of pressure transducer slide bar is close to testee's abdominal part, i.e. the initial value of displacement, abdomen external pressure is zero, slowly advances slide bar again, makes its end press abdominal part, to certain fixed displacement;
(2.2) under this displacement, pressure transducer is converted into magnitude of voltage with abdomen external pressure at this moment;
(3) this magnitude of voltage is input to an amplification and the corresponding voltage amplifier circuit of abdomen external pressure measuring range;
(4) output signal of voltage amplifier circuit is sent to CPU after the A/D conversion, calculates corresponding intra-abdominal pressure and is also shown; Also being sent to PC through the USB capture card simultaneously stores.
System of the present invention is characterized in that: it contains:
Pressure-displacement transducer, it is made of pressure transducer and displacement transducer mechanical connection;
Voltage amplifier circuit, the data output end of its input and above-mentioned pressure transducer links to each other;
A/D converter, its input links to each other with the outfan of above-mentioned voltage amplifier circuit;
CPU, its signal input part links to each other with the outfan of above-mentioned A/D converter, and the signal output part of this CPU links to each other with the signal input part of a display circuit;
The USB capture card, its signal input part links to each other with the outfan of above-mentioned voltage amplifier circuit, and the outfan of USB capture card then links to each other with a PC.
This method has release the infection that may cause in the wound measurement, make the clinician not have and realize under the condition of any wound that the patient's condition is followed the tracks of and monitoring in time patient, and operating time is made the best judge, and this method is simple to operation, is more suitable for clinical practice.
Description of drawings
Fig. 1. the structural representation of pressure-displacement transducer.
Fig. 2. the use sketch map of pressure-displacement transducer:
The slide bar of A-pressure transducer is close to testee's abdominal part;
The slide bar extruding testee abdominal part of B-pressure transducer.
Fig. 3. the calculation flow chart of intra-abdominal pressure noinvasive detection method.
Fig. 4. the schematic block circuit diagram of intra-abdominal pressure noinvasive detection system.
Fig. 5. the displacement of embodiment-abdomen external pressure curve.
Fig. 6. abdomen external pressure-intra-abdominal pressure curve of embodiment.
The specific embodiment
Ask for an interview Fig. 1: the 6th, pressure transducer, the 1st, its slide bar, the 3rd, displacement transducer, 2 is slide heads of 3, the 5th, cylinder.Displacement transducer 3 usefulness screws 4 are fixed on the inwall of cylinder 5, the slide bar 1 and slide head 5 wedge joints, and pressure transducer 6 then passes the two ends up and down of cylinder 5.
Earlier be close to testee's abdominal part, again the displacement transducer slide head slowly be advanced into a fixed value, cause the variation of abdomen external pressure in this progradation, thereby cause the variation of pressure transducer output voltage, record curve shown in Figure 5 with slide bar 1.By system of the present invention, obtain curve shown in Figure 6 again, and output shows on display circuit.
Below be one embodiment of the present of invention: adopt YH-4 type pressure transducer, the employing slide rheostat is a displacement transducer, obtain abdomen external pressure-intra-abdominal pressure conversion formula coefficient a=110.0746 by data fitting, b=-3.4664, measured intra-abdominal pressure is pressed the measured value tabulation with bladder commonly used and is compared as follows:
| Age | Sex | Height (cm) | Body weight (kg) | Abdomen external pressure (mv) | Bladder is pressed measured value (cm water column) | Intra-abdominal pressure value of calculation (cm water column) | Error | The patient's condition |
| 58 | The man | 173 | 53 | 100 | 7.5 | 7.54 | 0.04 | The abdominal cavity mucinous adenocarcinoma |
| 38 | The man | 168 | 55 | 68 | 4.0 | 4.02 | 0.02 | Cerebral trauma |
| 71 | The woman | 155 | 42.5 | 90 | 6.5 | 6.44 | 0.06 | Obstructive jaundice, carcinoma of head of pancreas |
Claims (1)
1, intra-abdominal pressure noinvasive detection system is characterized in that, it contains:
Pressure-displacement transducer is made of pressure transducer and displacement transducer mechanical connection, as follows abdominal pressure is converted to displacement:
At first, testee's abdominal part is close in the end of pressure transducer slide bar, i.e. the initial value of displacement, abdomen external pressure is zero, slowly advances slide bar again, makes its end press abdominal part, to certain fixed displacement;
Secondly, under this displacement, pressure transducer is converted into magnitude of voltage with abdomen external pressure at this moment;
The 3rd, this magnitude of voltage is input to an amplification and the corresponding voltage amplifier circuit of abdomen external pressure measuring range; Voltage amplifier circuit, the data output end of input and above-mentioned pressure transducer links to each other;
A/D converter, input links to each other with the outfan of above-mentioned voltage amplifier circuit;
CPU, signal input part links to each other with the outfan of above-mentioned A/D converter, and the signal output part of this CPU links to each other with the signal input part of a display circuit; According to following formula y=ax+b the abdomen external pressure is converted to intra-abdominal pressure, wherein x is the abdomen external pressure, and y is an intra-abdominal pressure, and a, b are undetermined coefficient, and for the pressure-displacement transducer of different model, the occurrence of a, b can be tried to achieve by the method for data fitting in advance;
The USB capture card, signal input part links to each other with the outfan of above-mentioned voltage amplifier circuit, and the outfan of USB capture card then links to each other with a PC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100091666A CN100346742C (en) | 2004-06-03 | 2004-06-03 | Method and system for non-invasive detecting intra-abdominal pressure |
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| CNB2004100091666A CN100346742C (en) | 2004-06-03 | 2004-06-03 | Method and system for non-invasive detecting intra-abdominal pressure |
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| CN1582848A CN1582848A (en) | 2005-02-23 |
| CN100346742C true CN100346742C (en) | 2007-11-07 |
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| CNB2004100091666A Expired - Fee Related CN100346742C (en) | 2004-06-03 | 2004-06-03 | Method and system for non-invasive detecting intra-abdominal pressure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3744234A1 (en) | 2020-02-12 | 2020-12-02 | Univerza na Primorskem | A device and a method for non-invasive evaluation of functional stability of the trunk |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101006924B (en) * | 2006-01-25 | 2010-11-24 | 上海中医药大学 | A method for measuring abdominal tension and abdominal diagnosis instrument thereof |
| CN102631191B (en) * | 2012-03-27 | 2014-04-23 | 苏州达维生物医药有限公司 | System and method for monitoring urinary bladder pressure and abdominal pressure |
| WO2013143361A1 (en) | 2012-03-27 | 2013-10-03 | 苏州达维生物医药有限公司 | System and method for monitoring bladder and abdominal pressures, and bladder function recovery system |
| CN105615904B (en) * | 2016-03-30 | 2018-08-03 | 南京医科大学 | A kind of noninvasive abdominal cavity pressure measuring device |
| CN106333697A (en) * | 2016-09-22 | 2017-01-18 | 北京机械设备研究所 | Human intra-abdominal pressure testing method based on musculoskeletal biodynamics |
| CN110840430B (en) * | 2018-08-21 | 2022-09-13 | 北京万生人和科技有限公司 | Intra-abdominal pressure data screening method, computer-readable storage medium, and intra-abdominal pressure data screening device |
| CN109363672B (en) * | 2018-09-07 | 2021-09-07 | 南方医科大学珠江医院 | Intelligent monitoring device and training monitoring method for core muscle group |
| CN113693581B (en) * | 2021-09-03 | 2023-06-06 | 北京长空动力科技有限公司 | Noninvasive non-invasive intra-abdominal pressure testing system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5211642A (en) * | 1991-10-28 | 1993-05-18 | Clendenning Beverly F | Chambers drainage system |
| US5433216A (en) * | 1993-06-14 | 1995-07-18 | Mountpelier Investments, S.A. | Intra-abdominal pressure measurement apparatus and method |
| CN1400883A (en) * | 2000-12-05 | 2003-03-05 | 霍尔泰克医疗公司 | Method and apparatus for the measurement of intra abdominal pressure |
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2004
- 2004-06-03 CN CNB2004100091666A patent/CN100346742C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5211642A (en) * | 1991-10-28 | 1993-05-18 | Clendenning Beverly F | Chambers drainage system |
| US5433216A (en) * | 1993-06-14 | 1995-07-18 | Mountpelier Investments, S.A. | Intra-abdominal pressure measurement apparatus and method |
| CN1400883A (en) * | 2000-12-05 | 2003-03-05 | 霍尔泰克医疗公司 | Method and apparatus for the measurement of intra abdominal pressure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3744234A1 (en) | 2020-02-12 | 2020-12-02 | Univerza na Primorskem | A device and a method for non-invasive evaluation of functional stability of the trunk |
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| CN1582848A (en) | 2005-02-23 |
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