CN113693581B - Noninvasive non-invasive intra-abdominal pressure testing system - Google Patents
Noninvasive non-invasive intra-abdominal pressure testing system Download PDFInfo
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- CN113693581B CN113693581B CN202111032102.8A CN202111032102A CN113693581B CN 113693581 B CN113693581 B CN 113693581B CN 202111032102 A CN202111032102 A CN 202111032102A CN 113693581 B CN113693581 B CN 113693581B
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- 238000012360 testing method Methods 0.000 title claims abstract description 17
- 210000003815 abdominal wall Anatomy 0.000 claims abstract description 57
- 239000012528 membrane Substances 0.000 claims abstract description 23
- 230000008859 change Effects 0.000 claims abstract description 12
- 210000001015 abdomen Anatomy 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 13
- 238000005259 measurement Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 7
- 230000003993 interaction Effects 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims 1
- 238000009530 blood pressure measurement Methods 0.000 abstract description 4
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 238000011897 real-time detection Methods 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 5
- 210000000683 abdominal cavity Anatomy 0.000 description 4
- 238000000691 measurement method Methods 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
- 206010020772 Hypertension Diseases 0.000 description 1
- 208000002623 Intra-Abdominal Hypertension Diseases 0.000 description 1
- 206010047249 Venous thrombosis Diseases 0.000 description 1
- 230000003187 abdominal effect Effects 0.000 description 1
- 238000004364 calculation method 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
- 239000012530 fluid Substances 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
- 230000008569 process Effects 0.000 description 1
- 210000000664 rectum Anatomy 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 210000001631 vena cava inferior Anatomy 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
-
- 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
-
- 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
Abstract
The invention provides a noninvasive non-invasive intra-abdominal pressure testing system which consists of 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, abdominal wall mechanical properties and the like; the intra-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 the basic parameters of the abdominal wall and the key parameters given by indirect intra-abdominal pressure measurement. The device has the advantages that the curvature sensor and the air pressure sensor are matched with the form change of the inflatable membrane, change data are dynamically acquired, and the real-time detection function is realized, so that the real-time monitoring of the intra-abdominal pressure is realized.
Description
Technical Field
The invention relates to the field of intra-abdominal pressure testing, in particular to a noninvasive non-invasive intra-abdominal pressure testing system.
Background
Intra-abdominal pressure (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 intra-abdominal pressure is a reliable basis for clinical diagnosis and treatment, and intra-abdominal pressure detection and monitoring are carried out conventionally in an ICU, so that the change of the condition of a patient suffering from abdominal hypertension can be accurately predicted, the occurrence of abdominal compartment syndrome can be prevented and treated early, and the mortality rate of critical patients can be reduced.
The measurement of intra-abdominal pressure is generally performed in the prior art by the following method:
(1) The direct measurement method, namely, the pressure measurement is carried out by connecting the sensor through the abdominal cavity drainage tube or the puncture needle, the measured value is accurate, but the method is invasive operation, and most of patients have complex abdominal cavity conditions and are easy to generate risks, so the method is rarely applied clinically.
(2) Indirect interventional measurement is an indirect interventional measurement which indirectly reflects intra-abdominal pressure by interventional measurement of lower cavity venous pressure, intra-gastric pressure, pressure in rectum and bladder, and the like, and is widely used at present. The method has the advantages of complex operation, unclear mechanical mechanism and insufficient measurement precision, and some indirect measurement methods even have obvious danger (such as the inferior vena cava pressure indirect measurement method is easy to form venous thrombosis) and have limited clinical application.
Therefore, how to provide a method capable of accurately measuring intra-abdominal pressure under non-invasive conditions is called a problem to be solved.
Disclosure of Invention
The invention provides a noninvasive non-invasive intra-abdominal pressure testing system, which achieves the purpose of measuring real-time intra-abdominal pressure in a noninvasive mode at multiple angles.
To achieve the above object, the present invention provides a non-invasive intra-abdominal pressure test 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 together to obtain the approximate Young modulus of the abdominal wall and the abdominal wall thickness. The intra-abdominal pressure indirect measuring device consists of an inflatable ball membrane, a curvature sensor and a barometric sensor, and after the intra-abdominal pressure indirect measuring device is contacted with the abdomen and pressurized, the intra-abdominal pressure indirect measuring device is deformed 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, the approximate Young's modulus of the abdominal wall and the abdominal wall thickness of the intra-abdominal pressure indirect measuring device to obtain intra-abdominal pressure P b ：
P b ≈P 2 ±K r (K b E b t b +K m E m t 2 )/r 3 ；
Wherein K is r Taking 1 when the contact area is in a single-curvature sphere shape as a curvature variation coefficient; k (K) b Taking 1 as the abdominal wall material variation coefficient when the abdominal wall is in a small strain state; wherein K is m The spherical membrane material variation coefficient is 1 when the spherical membrane is in a small strain state.
Preferably, the method for obtaining the intra-abdominal pressure parameter after the intra-abdominal pressure indirect measurement device contacts the abdomen and applies pressure includes: attaching and fixing the curvature sensor and the inflatable ball membrane, and acquiring the curvature radius r of a contact area between the curvature sensor and an abdomen contact area when the inflatable ball membrane is pressed on the abdomen 3 。
Preferably, as the above technical scheme, an air pressure sensor is arranged on the inflatable membraneWhen the intra-abdominal pressure indirect measuring device is attached to the abdomen, the air pressure sensor obtains the pressure change in the inflatable balloon membrane, and the initial internal pressure is P 1 Internal pressure after contact is P 2 。
Preferably, when the initial internal pressure is 0, the initial wall thickness t is recorded 0 The method comprises the steps of carrying out a first treatment on the surface of the After the inflatable balloon membrane contacts the abdominal wall, the contact wall thickness t is recorded 2 。
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 properties and the like; the intra-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 mechanical principle, the intra-abdominal pressure value is obtained by inverting the basic parameters of the abdominal wall and key parameters given by indirect intra-abdominal pressure measurement.
The invention has the advantages that the intra-abdominal pressure detection is realized in a non-wound/face 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 accuracy 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 prior art descriptions, and it is obvious that the drawings in the following description are some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a structure of an abdominal wall basic parameter measurement device and abdomen in cooperation with each other in a non-invasive intra-abdominal pressure test system according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an indirect intra-abdominal pressure measuring device before measurement in a non-invasive intra-abdominal pressure testing system according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of an indirect intra-abdominal pressure measuring device in a non-invasive intra-abdominal pressure testing system according to an embodiment of the present invention in the process of measuring intra-abdominal pressure.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Firstly, the matched noninvasive non-invasive intra-abdominal pressure testing device for realizing the intra-abdominal pressure testing method provided by the invention is described:
as shown in fig. 1 and 2, the apparatus includes: an abdominal wall basic parameter measuring device 1 consisting of an abdominal wall mechanical property measuring device 11 and an abdominal wall thickness measuring device 12, and an intra-abdominal pressure indirect measuring device 2 consisting of 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 used to obtain the thickness of the abdominal wall 24 and the young's modulus of the abdomen, respectively.
The inflatable balloon 21 is attached to the curvature sensor 22, and the curvature sensor 22 deforms along with the deformation of the inflatable balloon 21, so that the real-time curvature change of the abdomen is obtained. The air pressure sensor 23 is installed outside the inflatable balloon 21 and adjacent to the curvature sensor 22, and the air pressure sensor 23 collects air pressure changes in the balloon sensor. When calculating intra-abdominal pressure, the air pressure variation value is used in combination with the curvature variation value.
The specific embodiments of the present invention will now be described in one step:
firstly, the abdominal wall mechanical property measuring device 11 and the abdominal wall thickness measuring device 12 are close to the outer wall of the abdominal wall 24, and the approximate Young modulus E of the abdominal wall 24 is obtained according to the ultrasonic vibration detection method, the static strain estimation method and other methods b The method comprises the steps of carrying out a first treatment on the surface of the The abdominal wall thickness measuring device 12 adopts abdominal wall color Doppler ultrasound, CT, magnetic resonance imaging and the like to obtain the abdominal wall thickness t b 。
Then as shown in FIG. 2, in the initial stateWhen the internal pressure of the inflatable balloon 21 is 0, the initial wall thickness t of the inflatable balloon 21 is obtained 0 Initial radius r 0 The method comprises the steps of carrying out a first treatment on the surface of the The internal pressure of the inflatable membrane 21 is P 1 When the wall thickness is t 1 Radius r 1 This step aims to obtain a data relationship between the internal pressure, wall thickness and radius of the inflatable balloon membrane 21.
In the intra-abdominal pressure measurement, as shown in fig. 3, the inflatable balloon 21 is pressed near the outside of the abdominal wall 24, and at this time, the abdominal cavity 25 receives an external force to change the internal pressure and applies a back pressure force to the inflatable balloon 21 to deform the inflatable balloon 21 (change the internal pressure of the inflatable balloon), and when the deformation of the inflatable balloon 21 is stabilized (the value of the air pressure sensor 23 is stable), the radius of curvature r of the contact area between the curvature sensor 22 and the abdominal wall 24 is obtained 3 The air pressure sensor 23 measures the internal pressure P of the inflatable membrane 21 2 When the wall thickness of the inflatable membrane 21 is t 2 At this time, the intra-abdominal pressure P is obtained according to an approximate inversion formula of the intra-abdominal pressure b ：
P b ≈P 2 ±K r (K b E b t b +K m E m t 2 )/r 3
The ± sign in the above formula is determined by positive and negative curvature of the contact surface, wherein the contact surface is a convex surface with "+" (the intra-abdominal pressure is greater than the intra-balloon pressure), and the contact surface is a concave surface with "-" (the intra-abdominal pressure is greater than the intra-balloon pressure), which are shown in fig. 2. K (K) r Taking 1 when the contact area is in a single-curvature sphere shape, and carrying out variation correction on concave-convex curved surfaces at each variation shape according to actual measurement conditions when the contact area is in an ellipsoid or other variation shapes, so as to obtain the curvature of the corresponding concave-convex curved surfaces; k (K) b Taking 1 when the abdominal wall is in a small strain state as a variation coefficient of the abdominal wall, and performing variation treatment on the parameter according to the material nonlinearity and the geometric nonlinearity if the abdominal wall is in a large strain state; k (K) m For the material variation coefficient of the inflatable balloon 21, 1 is taken when the inflatable balloon 21 is in a small strain state, and if the balloon is in a large strain state, the parameter is subjected to variation treatment according to the material nonlinearity and geometric nonlinearity.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (4)
1. A non-invasive, 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 together to obtain the approximate Young modulus and the abdominal wall thickness of the abdominal wall;
the intra-abdominal pressure indirect measuring device consists of an inflatable ball membrane, a curvature sensor and a barometric pressure sensor, wherein after the intra-abdominal pressure indirect measuring device contacts and applies pressure to the abdomen, the intra-abdominal pressure indirect measuring device deforms according to the principle of interaction force through the deformation of the abdomen, so that intra-abdominal pressure parameters are obtained;
combining the intra-abdominal pressure parameter with an initial pressure parameter of an intra-abdominal pressure indirect measuring device, the approximate Young's modulus of the abdominal wall and the abdominal wall thickness to obtain intra-abdominal pressure P b ：
P b ≈P 2 ±K r (K b E b t b +K m E m t 2 )/r 3 ；
Wherein K is r Taking 1 when the contact area is in a single-curvature sphere shape as a curvature variation coefficient; k (K) b Taking 1 as the abdominal wall material variation coefficient when the abdominal wall is in a small strain state; wherein K is m Taking 1 as the variation coefficient of the spherical membrane material when the spherical membrane is in a small strain state; p (P) 2 An internal pressure after contact after the inflatable balloon membrane contacts the abdomen, E b Young's modulus, t, of the abdominal wall b For the thickness of the abdominal wall t 2 Is filled withWall thickness after balloon membrane contacts abdominal wall, r 3 Is the radius of curvature of the contact area of the curvature sensor.
2. The system of claim 1, wherein said bringing said intra-abdominal pressure indirect measurement device into contact with the abdomen and applying pressure to obtain an intra-abdominal pressure parameter comprises:
attaching and fixing the curvature sensor and the inflatable ball membrane, and acquiring the curvature radius r of a contact area between the curvature sensor and an abdomen contact area when the inflatable ball membrane is pressed on the abdomen 3 。
3. The system of claim 1, wherein the inflatable balloon membrane is provided with an air pressure sensor, and wherein the air pressure sensor obtains a pressure change in the inflatable balloon membrane when the intra-abdominal pressure indirect measuring device is attached to the abdomen, and the initial internal pressure is P 1 Internal pressure after contact is P 2 。
4. A system according to claim 3, wherein an initial wall thickness t is recorded when the initial internal pressure is 0 0 The method comprises the steps of carrying out a first treatment on the surface of the After the inflatable balloon membrane contacts the abdominal wall, the contact wall thickness t is recorded 2 。
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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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| Publication number | Priority date | Publication date | Assignee | Title |
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| RU2012123000A (en) * | 2012-06-04 | 2013-12-10 | Альберт Асхатович Кузин | METHOD FOR MEASURING INTERNAL PRESSURE |
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| CN100346742C (en) * | 2004-06-03 | 2007-11-07 | 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 |
| DE102009017034B3 (en) * | 2009-04-09 | 2010-06-17 | Pulsion Medical Systems Ag | Device for measuring the bubble 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 |
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| RU2012123000A (en) * | 2012-06-04 | 2013-12-10 | Альберт Асхатович Кузин | METHOD FOR MEASURING INTERNAL PRESSURE |
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