CN113693581A - Noninvasive non-intrusive intra-abdominal pressure testing system - Google Patents
Noninvasive non-intrusive intra-abdominal pressure testing system Download PDFInfo
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- CN113693581A CN113693581A CN202111032102.8A CN202111032102A CN113693581A CN 113693581 A CN113693581 A CN 113693581A CN 202111032102 A CN202111032102 A CN 202111032102A CN 113693581 A CN113693581 A CN 113693581A
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- 238000012360 testing method Methods 0.000 title claims abstract description 17
- 210000003815 abdominal wall Anatomy 0.000 claims abstract description 50
- 239000012528 membrane Substances 0.000 claims abstract description 30
- 230000008859 change Effects 0.000 claims abstract description 11
- 230000003187 abdominal effect Effects 0.000 claims abstract description 5
- 210000001015 abdomen Anatomy 0.000 claims description 14
- 238000005259 measurement Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 5
- 230000003993 interaction Effects 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
- 238000009530 blood pressure measurement Methods 0.000 abstract description 3
- 230000004660 morphological change Effects 0.000 abstract 1
- 238000011897 real-time detection Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 9
- 238000001514 detection method Methods 0.000 description 5
- 238000000691 measurement method Methods 0.000 description 5
- 210000000683 abdominal cavity Anatomy 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000003759 clinical diagnosis Methods 0.000 description 2
- 206010058808 Abdominal compartment syndrome Diseases 0.000 description 1
- 208000028399 Critical Illness Diseases 0.000 description 1
- 206010020772 Hypertension Diseases 0.000 description 1
- 208000002623 Intra-Abdominal Hypertension Diseases 0.000 description 1
- 206010047249 Venous thrombosis Diseases 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000013170 computed tomography imaging Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000001815 facial effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000001990 intravenous administration Methods 0.000 description 1
- 238000002595 magnetic resonance imaging Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012285 ultrasound imaging Methods 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/03—Detecting, measuring or recording fluid pressure within the body other than blood pressure, e.g. cerebral pressure; Measuring pressure in body tissues or organs
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0048—Detecting, measuring or recording by applying mechanical forces or stimuli
- A61B5/0053—Detecting, measuring or recording by applying mechanical forces or stimuli by applying pressure, e.g. compression, indentation, palpation, grasping, gauging
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/22—Ergometry; Measuring muscular strength or the force of a muscular blow
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- 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
- A61B5/6813—Specially adapted to be attached to a specific body part
- A61B5/6823—Trunk, e.g., chest, back, abdomen, hip
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change
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Abstract
The invention provides a non-invasive non-intrusive intra-abdominal pressure testing system which comprises an abdominal wall basic parameter measuring device and an intra-abdominal pressure indirect measuring device. The abdominal wall parameter measuring device is used for testing specific parameters such as abdominal wall thickness and abdominal wall mechanical characteristics; the abdominal pressure indirect measuring device is used for testing key parameters such as curvature change of the outer surface of the abdominal wall, pressure change of the outer surface of the abdominal wall and the like; based on the mechanics principle, the intra-abdominal pressure value is obtained by inverting key parameters given by the basic parameters of the abdominal wall and indirect intra-abdominal pressure measurement. The advantage is, curvature sensor and baroceptor cooperation inflatable balloon membrane's morphological change, and dynamic acquisition changes data realizes real-time detection function to realize intra-abdominal pressure real-time supervision.
Description
Technical Field
The invention relates to the field of intra-abdominal pressure testing, in particular to a non-invasive non-intrusive intra-abdominal pressure testing system.
Background
Intra-abdominal pressure (IAP) is the fluid pressure inside the abdominal cavity and is one of the important physiological parameters for clinical diagnosis and treatment of disease. The detection of the intra-abdominal pressure is a reliable basis for clinical diagnosis and treatment, and the intra-abdominal pressure detection and monitoring are conventionally carried out in the ICU, so that the change of the state of illness of the patient with the abdominal hypertension can be accurately predicted, the occurrence of the abdominal compartment syndrome can be prevented and treated as soon as possible, and the death rate of the critically ill patient is reduced.
The measurement of the intra-abdominal pressure is generally carried out in the prior art by the following methods:
(1) the direct measurement method is that the measurement is carried out by connecting an abdominal cavity drainage tube or a puncture needle with a sensor, the measurement value is accurate, but the method is invasive operation, and in addition, the abdominal cavity of most patients is complex in condition and easy to generate risks, so the method is rarely applied clinically.
(2) The indirect interventional measurement method is to indirectly reflect the intra-abdominal pressure by interventional measurement of the intra-venous pressure of the lower cavity, the intra-gastric pressure, the intra-rectal pressure and the intra-bladder pressure, and the current application is more widely the indirect interventional measurement of the intra-bladder pressure. The method has the advantages of complex operation, unclear mechanical mechanism and insufficient measurement precision, and some indirect measurement methods even have obvious danger (for example, venous thrombosis is easily formed by a lower cavity venous pressure indirect measurement method), and the clinical application of the method is limited.
Therefore, how to provide a method capable of accurately measuring intra-abdominal pressure under non-invasive conditions is an urgent problem to be solved.
Disclosure of Invention
The invention provides a non-invasive non-intrusive intra-abdominal pressure testing system, which realizes the purpose of measuring real-time intra-abdominal pressure in a non-invasive manner at multiple angles.
In order to achieve the above object, the present invention provides a non-invasive intra-abdominal pressure testing system, comprising: an abdominal wall basic parameter measuring device and an intra-abdominal pressure indirect measuring device. The abdominal wall basic parameter measuring device comprises an abdominal wall mechanical property measuring device and an abdominal wall thickness measuring device which are used in a matched mode to obtain the approximate Young modulus and the approximate abdominal wall thickness of the abdominal wall. The intra-abdominal pressure indirect measuring device is composed of an inflatable spherical membrane, a curvature sensor and a pressure sensor, and is in contact with the abdomen and applies pressure, and then deforms through the abdomen deformation according to the interaction force principle, so that intra-abdominal pressure parameters are obtained. Combining the intra-abdominal pressure parameter with the initial pressure parameter of the intra-abdominal pressure indirect measuring device, the approximate Young modulus of the abdominal wall and the abdominal wall thickness to obtain the intra-abdominal pressurePb：
Pb≈P2±Kr(KbEbtb+KmEmt2)/r3；
Wherein, KrThe curvature coefficient is 1 when the contact zone is in a single curvature sphere shape; kbTaking 1 when the abdominal wall is in a small strain state; wherein, KmThe coefficient of variation of the spherical film material is 1 when the spherical film is in a small strain state.
Preferably, in the above-described aspect, the obtaining of the intra-abdominal pressure parameter after bringing the intra-abdominal pressure indirect measurement device into contact with the abdomen and applying pressure includes: the curvature sensor is fixedly attached to the inflatable spherical membrane, and the curvature radius r of a contact area of the curvature sensor and the abdomen contact area is obtained when the inflatable spherical membrane is pressed on the abdomen nearly3。
Preferably, when the indirect intra-abdominal pressure measuring device is attached to the abdomen, the pressure sensor obtains the pressure change in the inflatable balloon, and the initial internal pressure is P1Internal pressure after contact of P2。
Preferably, in the above aspect, the initial wall thickness t is recorded when the initial internal pressure is 00(ii) a Recording the contact wall thickness t after the inflatable balloon membrane contacts the abdominal wall2。
The technical scheme of the invention provides an abdominal wall parameter measuring device which is used for testing specific parameters such as abdominal wall thickness, abdominal wall mechanical characteristics and the like; the abdominal pressure indirect measuring device is used for testing key parameters such as curvature change of the outer surface of the abdominal wall, pressure change of the outer surface of the abdominal wall and the like; based on a simple mechanics principle, an intra-abdominal pressure value is obtained by inverting key parameters given by the basic parameters of the abdominal wall and indirect intra-abdominal pressure measurement.
The invention has the advantages that the intra-abdominal pressure detection is realized in a non-wound/non-facial mode, the comfort level of a patient during detection can be improved, the intra-abdominal pressure calculation method can be corrected by combining a direct measurement method, and the measurement precision is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description will be given below of the drawings required for the embodiments or the technical solutions in the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an abdominal wall basic parameter measuring device and an abdomen in a non-invasive intra-abdominal pressure testing system according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an indirect measuring apparatus for intra-abdominal pressure in the noninvasive non-invasive intra-abdominal pressure testing system according to the embodiment of the present invention before measurement.
Fig. 3 is a schematic structural diagram of an intra-abdominal pressure indirect measurement device in the non-invasive intra-abdominal pressure test system according to the embodiment of the present invention in the intra-abdominal pressure measurement process.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Firstly, a matched noninvasive non-invasive intra-abdominal pressure testing device for realizing the intra-abdominal pressure testing method provided by the invention is explained as follows:
as shown in fig. 1 and 2, the apparatus includes: the abdominal wall basic parameter measuring device 1 comprises an abdominal wall mechanical property measuring device 11 and an abdominal wall thickness measuring device 12, and the intra-abdominal pressure indirect measuring device 2 comprises an inflatable balloon membrane 21, a curvature sensor 22 and an air pressure sensor 23.
The abdominal wall mechanical property measuring device 11 and the abdominal wall thickness measuring device 12 are respectively used for obtaining the thickness of the abdominal wall 24 and the Young modulus of the abdominal wall.
The inflatable balloon membrane 21 is attached to the curvature sensor 22, and the curvature sensor 22 deforms along with the deformation of the inflatable balloon membrane 21, so that the real-time curvature change of the abdomen is obtained. The air pressure sensor 23 is installed outside the inflatable spherical membrane 21 and adjacent to the curvature sensor 22, and the air pressure sensor 23 collects air pressure changes in the spherical membrane sensor. When calculating intra-abdominal pressure, the air pressure change value is used in conjunction with the curvature change value.
The specific embodiments of the present invention will now be described in further detail:
firstly, an abdominal wall mechanical property measuring device 11 and an abdominal wall thickness measuring device 12 are close to the outer wall of an abdominal wall 24, and an approximate Young modulus E of the abdominal wall 24 is obtained according to methods such as an ultrasonic vibration detection method and a static strain estimation methodb(ii) a The abdominal wall thickness measuring device 12 adopts abdominal wall color ultrasound, CT or magnetic resonance imaging and the like, and can obtain the abdominal wall thickness tb。
Then, as shown in fig. 2, in the initial state, when the internal pressure of the balloon membrane 21 is taken to be 0, the initial wall thickness t of the balloon membrane 21 is obtained0Initial radius r0(ii) a The internal pressure of the inflatable balloon membrane 21 is P1When the wall thickness is t1Radius r1This step is intended to obtain a data relationship among the internal pressure of the balloon membrane 21, the wall thickness and the radius.
When the intra-abdominal pressure is measured, as shown in fig. 3, the inflatable balloon membrane 21 is brought close to the outer side of the abdominal wall 24 and is pressed, at this time, the abdominal cavity 25 is subjected to internal pressure change caused by external force, and a back pressure acting force is applied to the inflatable balloon membrane 21 so that the inflatable balloon membrane 21 is deformed (the internal pressure of the inflatable balloon membrane is changed), and when the deformation of the inflatable balloon membrane 21 is stable (the value of the air pressure sensor 23 is stable), the curvature radius r of the contact region between the curvature sensor 22 and the abdominal wall 24 is obtained3The air pressure sensor 23 measures the internal pressure of the inflatable balloon membrane 21 as P2When the thickness of the balloon membrane 21 is t2At the moment, the intra-abdominal pressure P is obtained according to an approximate inversion formula of the intra-abdominal pressureb：
Pb≈P2±Kr(KbEbtb+KmEmt2)/r3
Wherein, the plus or minus sign in the above formula is determined by the positive or negative curvature of the contact surface, the contact surface is a convex curved surface with a plus sign (the intra-abdominal pressure is greater than the intra-spherial pressure), and the contact surface is a concave curved surface with a minus sign (the intra-abdominal pressure is greater than the intra-spherial pressure), as shown in the curved surface in fig. 2. KrWhen the contact area is in an ellipsoid or other variable shapes, performing variation correction on the concave-convex curved surface at each variable shape according to actual measurement conditions, and acquiring the curvature of the corresponding concave-convex curved surface; kbTaking 1 when the abdominal wall is in a small strain state, and if the abdominal wall is in a large strain state, carrying out variation treatment on the parameter according to the nonlinear and geometric nonlinear conditions of the material; kmFor the coefficient of variation of the material of the balloon membrane 21, 1 is taken when the balloon membrane 21 is in a small strain state, and if the balloon membrane is in a large strain state, the parameter is subjected to variation processing according to the conditions of material nonlinearity and geometric nonlinearity.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (4)
1. A non-invasive intra-abdominal pressure testing system, comprising: an abdominal wall basic parameter measuring device and an intra-abdominal pressure indirect measuring device;
the abdominal wall basic parameter measuring device comprises an abdominal wall mechanical property measuring device and an abdominal wall thickness measuring device which are used in a matched mode to obtain the approximate Young modulus and the approximate abdominal wall thickness of the abdominal wall;
the intra-abdominal pressure indirect measuring device is composed of an inflatable spherical membrane, a curvature sensor and an air pressure sensor, and is in contact with the abdomen and applies pressure, and then the intra-abdominal pressure indirect measuring device is deformed through the abdomen deformation according to the principle of interaction force, so that intra-abdominal pressure parameters are obtained;
combining the intra-abdominal pressure parameter with the initial pressure parameter of the intra-abdominal pressure indirect measuring device, the approximate Young modulus of the abdominal wall and the thickness of the abdominal wall to obtain intra-abdominal pressure Pb：
Pb≈P2±Kr(KbEbtb+KmEmt2)/r3；
Wherein, KrThe curvature coefficient is 1 when the contact zone is in a single curvature sphere shape; kbTaking 1 when the abdominal wall is in a small strain state; wherein, KmThe coefficient of variation of the spherical film material is 1 when the spherical film is in a small strain state.
2. The system of claim 1, wherein obtaining the intra-abdominal pressure parameter after contacting the intra-abdominal pressure indirect measurement device with the abdomen and applying pressure comprises:
the curvature sensor and the inflatable ball membrane are fixedly attached, and when the inflatable ball membrane is pressed on the abdomen, the curvature radius r of a contact area between the curvature sensor and the contact area of the abdomen is obtained3。
3. The system according to claim 1, wherein a pressure sensor is mounted on the inflatable balloon membrane, and when the indirect intra-abdominal pressure measuring device is attached to the abdomen, the pressure sensor obtains the pressure change in the inflatable balloon membrane, and the initial internal pressure is P1Internal pressure after contact of P2。
4. The system of claim 3, wherein when the initial internal pressure is 0, an initial wall thickness t is recorded0(ii) a Recording the contact wall thickness t after the inflatable balloon membrane contacts the abdominal wall2。
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| CN202111032102.8A CN113693581B (en) | 2021-09-03 | 2021-09-03 | Noninvasive non-invasive intra-abdominal pressure testing system |
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| CN202111032102.8A CN113693581B (en) | 2021-09-03 | 2021-09-03 | Noninvasive non-invasive intra-abdominal pressure testing system |
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| CN113693581B CN113693581B (en) | 2023-06-06 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1582848A (en) * | 2004-06-03 | 2005-02-23 | 清华大学 | Method and system for non-invasive detecting intra-abdominal pressure |
| KR20090098097A (en) * | 2008-03-13 | 2009-09-17 | 인하대학교 산학협력단 | Apparatus for measuring abdominal pressure |
| US20120041334A1 (en) * | 2009-04-09 | 2012-02-16 | Oliver Goedje | Device for measuring the bladder pressure |
| CN102579028A (en) * | 2012-03-01 | 2012-07-18 | 北京麦邦光电仪器有限公司 | Method and system for measuring uterine contraction pressure by using air bag |
| CN202554415U (en) * | 2012-02-23 | 2012-11-28 | 钟薏 | Abdominal pressure regulating ball |
| RU2012123000A (en) * | 2012-06-04 | 2013-12-10 | Альберт Асхатович Кузин | METHOD FOR MEASURING INTERNAL PRESSURE |
-
2021
- 2021-09-03 CN CN202111032102.8A patent/CN113693581B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1582848A (en) * | 2004-06-03 | 2005-02-23 | 清华大学 | Method and system for non-invasive detecting intra-abdominal pressure |
| KR20090098097A (en) * | 2008-03-13 | 2009-09-17 | 인하대학교 산학협력단 | Apparatus for measuring abdominal pressure |
| US20120041334A1 (en) * | 2009-04-09 | 2012-02-16 | Oliver Goedje | Device for measuring the bladder pressure |
| CN202554415U (en) * | 2012-02-23 | 2012-11-28 | 钟薏 | Abdominal pressure regulating ball |
| CN102579028A (en) * | 2012-03-01 | 2012-07-18 | 北京麦邦光电仪器有限公司 | Method and system for measuring uterine contraction pressure by using air bag |
| RU2012123000A (en) * | 2012-06-04 | 2013-12-10 | Альберт Асхатович Кузин | METHOD FOR MEASURING INTERNAL PRESSURE |
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