CN101983729B - Negative pressure wound therapy system capable of detecting viscosity of wound exudates - Google Patents
Negative pressure wound therapy system capable of detecting viscosity of wound exudates Download PDFInfo
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- CN101983729B CN101983729B CN 201010550205 CN201010550205A CN101983729B CN 101983729 B CN101983729 B CN 101983729B CN 201010550205 CN201010550205 CN 201010550205 CN 201010550205 A CN201010550205 A CN 201010550205A CN 101983729 B CN101983729 B CN 101983729B
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- wound
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- 208000027418 Wounds and injury Diseases 0.000 title claims abstract description 165
- 206010052428 Wound Diseases 0.000 title claims abstract description 164
- 238000009581 negative-pressure wound therapy Methods 0.000 title claims abstract description 16
- 210000000416 exudates and transudate Anatomy 0.000 title abstract description 15
- 239000012530 fluid Substances 0.000 claims description 99
- 238000001514 detection method Methods 0.000 claims description 15
- 238000010008 shearing Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 9
- 238000012544 monitoring process Methods 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- 239000008280 blood Substances 0.000 claims description 3
- 210000004369 blood Anatomy 0.000 claims description 3
- 238000007789 sealing Methods 0.000 abstract 1
- 239000007943 implant Substances 0.000 description 5
- 238000011160 research Methods 0.000 description 4
- 238000005070 sampling Methods 0.000 description 4
- 208000032843 Hemorrhage Diseases 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000010478 bone regeneration Effects 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000035876 healing Effects 0.000 description 2
- 208000015181 infectious disease Diseases 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000029663 wound healing Effects 0.000 description 2
- 206010048038 Wound infection Diseases 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 210000001124 body fluid Anatomy 0.000 description 1
- 239000010839 body fluid Substances 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000001684 chronic effect Effects 0.000 description 1
- 238000000205 computational method Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
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Abstract
The invention discloses a negative pressure wound therapy (NPWT) system capable of detecting viscosity of wound exudates, comprising an exudates collecting bottle, an NPWT device, a wound kit and a device for detecting viscosity of wound exudates, wherein the exudates collecting bottle is used for collecting the wound exudates; the NPWT device comprises a negative pressure source and a controller; the wound kit is used for filling and sealing the wounds and is communicated with the exudates collecting bottle by a connecting pipe; and the device for detecting viscosity of wound exudates is used for detecting the viscosity of the wound exudates in the exudates collecting bottle. The system can detect the viscosity of the wound exudates, quantize the viscosity concretely, ensure the medical workers to more accurately know the viscosity of the wound exudates and timely treat the conditions such as higher viscosity and aggravated wounds, and provide convenience for the medical workers to study the wounds.
Description
Technical field
The present invention relates to the negative pressure wound therapy device technical field, relate in particular to a kind of negative pressure wound treating system that detects the wound fluid viscosity.
Background technology
Negative pressure wound therapy device, the U.S. is called Negative_Pressure_Wound_Therapy_Devices, and referred to as NPWT, its principle promotes the healing of wound for by the wound being applied negative pressure.Clinical showing over past according to the U.S. 10 years, this equipment has good healing effect to the treatment of wounds of various acute and chronics.
Usually, the negative pressure wound treating system container (being liquid-collecting bottle referred to herein as this container) that comprises negative pressure wound therapy device, wound external member and be used for collecting the wound transudate.Wherein, the wound external member is used for wound closure, makes negative pressure space; Negative pressure wound therapy device is used for createing needed wound negative pressure, by a negative pressure source, forms with a controller.Referring to Fig. 1, be a kind of common negative pressure wound treating system shown in Fig. 1, wherein, be negative pressure wound therapy device 8 in the dotted line frame; Reference numeral 1 is human body wound circumference skin histology; Wound implant 2 is with human body wound covering; Wound closure 3 is set above wound implant 2, wound is sealed, wound implant 2 is connected on liquid-collecting bottle 5 by connection tube 4, thereby will be directed to from the transudate of wound in liquid-collecting bottle 5, collect from the transudate of wound by liquid-collecting bottle 5, the other end of liquid-collecting bottle 5 is connected with negative pressure source 6, provides negative pressure by negative pressure source 6, provides power for wound fluid flow to liquid-collecting bottle 5; Negative pressure source 6 connects a controller 7, is realized controlling by 7 pairs of negative pressure sources of controller 6.
Wound fluid is the body fluid that accumulates in the wound, and its formation has a lot of physiological reasons.In treatment of wounds, the wound fluid viscosity is one of important topic of modern wound care research.Modern wound care is for the research of wound fluid, as the important indicator of Wound healing and bone regeneration.Viscosity and the numerous disease of wound fluid have close relationship, and the viscosity of measuring wound fluid is for the pathogeny of illustrating these diseases and in time diagnose and treatment has great importance.
But in the prior art, viscosity measurement to wound fluid does not have concrete method, the rare dense general micro-judgment according to the doctor of viscosity, with subjective view, perhaps adopt some coarse computational methods, these all can limit the precision that viscosity is measured, and generally in 10% left and right, the situation of fault processing the correct judgement of wound occurred thereby affect medical personnel.On November 13rd, 2009, food and drug administration's (being called for short FDA) reminds the public to note the complication relevant to NPWT, especially hemorrhage and infection.In 2 years, FDA receives 6 part death reports and the 77 part accident reportings relevant with using NPWT altogether in the past, and wherein 6 dead cases, 17 injury cases have bleeding, and severe infections appears in 27 leading case examples.For long-time not at one's side the Wound healing and bone regeneration of home care or medical personnel, wound infection or the wound deterioration phenomenon such as hemorrhage appear, and the general None-identified of patient and can not make in time correct treatment of wounds causes the generation of some accidents.
Summary of the invention
The object of the invention is to, a kind of negative pressure wound treating system that detects the wound fluid viscosity is provided, can detect the viscosity of wound fluid in liquid-collecting bottle, for medical personnel's observation and research work to wound fluid are provided convenience.
For solving the problems of the technologies described above, the negative pressure wound treating system that detects the wound fluid viscosity of the present invention comprises:
Liquid-collecting bottle is collected wound fluid;
Negative pressure wound therapy device is comprised of negative pressure source and controller;
The wound external member is filled and wound closure, is communicated with liquid-collecting bottle by connection tube;
Also comprise:
Wound fluid viscosity checkout gear, the viscosity of wound fluid in the detection liquid-collecting bottle.
Preferably, also comprise:
Data acquisition and blood processor gather and process wound fluid viscosity checkout gear and detect the data that obtain, and the numerical value after stores processor.
Preferably, described wound fluid viscosity checkout gear comprises capillary viscosimeter, detects the viscosity of wound fluid in liquid-collecting bottle.
Preferably, described capillary viscosimeter comprises:
The pressure detecting module detects the capillary tube pressure differential at two ends up and down;
The flow monitoring module, control and monitoring stream are crossed the flow of wound fluid capillaceous.
Preferably, described capillary viscosimeter also comprises arithmetic element, calculates the viscosity of wound fluid according to the pressure differential at two ends, capillary tube up and down and the flow that flows through wound fluid capillaceous.
Preferably, described wound fluid viscosity checkout gear comprises rotating cylinder viscometer.
Preferably, described rotating cylinder viscometer comprises:
The shearing stress detection module, the shearing stress of wound fluid in the detection liquid-collecting bottle;
The shear rate detection module, the shear rate of wound fluid in the detection liquid-collecting bottle.
Preferably, described rotating cylinder viscometer also comprises a data processing unit, the viscosity that calculates wound fluid according to shearing stress and the shear rate of wound fluid in liquid-collecting bottle.
Preferably, described wound fluid viscosity checkout gear comprises Ubbelohde viscometer or Engler viscometer.
the negative pressure wound treating system that detects the wound fluid viscosity of the present invention, due to wound fluid viscosity checkout gear being set, can detect the viscosity of wound fluid, medical personnel can rule of thumb be worth the viscosity judgement that this fuzzy data carries out wound fluid again, the value of calculation of viscosity is quantized, be convenient to the viscosity that medical personnel can understand wound fluid comparatively exactly, for medical personnel's wound research is provided convenience, become large for viscosity occurring, the situation that wound is worse off, medical personnel can in time process, prevent delay treatment.
Further, also comprise a data acquisition and blood processor, gather and process the data that wound fluid viscosity checkout gear obtains, then the numerical value after stores processor therefore, can facilitate medical personnel to check data in the future.
Description of drawings
Fig. 1 is the structural representation of existing negative pressure wound treating system;
Fig. 2 is the structural representation that the present invention can detect the negative pressure wound treating system embodiment one of wound fluid viscosity;
Fig. 3 is the principle schematic that in embodiment one, capillary viscosimeter detects viscosity;
Fig. 4 is the graph of relation of shearforce and shear rate;
In figure, relevant Reference numeral is as follows:
The 1-wound, 2-wound implant, 3-wound closure, the 4-connection tube, the 5-liquid-collecting bottle,
The 6-negative pressure source, the 7-controller, the 8-negative pressure wound therapy device, the 9-capillary tube, the 10-sampling tube,
The 11-test tube, the 12-water bath with thermostatic control, the 13-electromagnetic valve, 14-wound fluid viscosity checkout gear,
The 15-data acquisition processing device.
The specific embodiment
For making content of the present invention clearer, below be elaborated by specific embodiment.
Embodiment one
Referring to Fig. 2, the negative pressure wound treating system of the detected wound fluid viscosity in the present embodiment comprises:
Liquid-collecting bottle 5 is collected wound fluid;
Negative pressure wound therapy device 8 is comprised of negative pressure source 6 and controller 7, and liquid-collecting bottle 5 is connected by connection tube 4 with negative pressure source 6, for it provides negative pressure, makes wound fluid can flow in liquid-collecting bottle 5 by negative pressure source 6;
The wound external member is filled wound and wound closure, is communicated with liquid-collecting bottle 5 by connection tube 4, and the wound external member comprises wound implant 2 and wound closure 3;
Wound fluid viscosity checkout gear 14, detect the viscosity of liquid-collecting bottle 5 interior wound fluids, it comprises capillary viscosimeter, wherein, capillary viscosimeter comprises: for detection of the pressure detecting module of the pressure differential at two ends, capillary tube up and down, be used for controlling and monitoring stream cross wound fluid capillaceous the flow monitoring module, be used for calculating according to the pressure differential at two ends, capillary tube up and down and the flow that flows through wound fluid capillaceous the arithmetic element of the viscosity of wound fluid;
Data acquisition processing device 15 gathers and processes wound fluid viscosity checkout gear and detects the viscosity data that obtain, and obtains the meansigma methods of viscosity, as actual viscosity, and the numerical value of the actual viscosity after stores processor.
Below the principle of capillary viscosimeter utilization in the present embodiment is described:
Because wound fluid belongs to non-Newtonian fluid, the gradient of its shearing stress and shear rate changes with the size of shear rate, there is no constant viscosity number, thus the measurement of wound fluid viscosity be actually measure wound fluid watch viscosity quietly with the change curve of shear rate.
As shown in Figure 3, capillary tube 9 two ends exist pressure differential, and wound fluid flows through capillary tube 9 in the unit interval flow is:
Wherein, Q is the flow of wound fluid in the unit interval, and R is the inside radius of capillary tube 9, and τ is the suffered shearing stress of the wound fluid in somewhere in capillary tube 9, τ
wBe the capillary tube 9 suffered shearing stress of inwall place's wound fluid, and
Wherein, Δ P is the pressure differential of capillary tube 9 place, two ends wound fluids, and L is the length of capillary tube 9, and γ is shear rate.
Theory and practice proves, shear rate and shearing stress relation satisfy the power law model, that is:
γ(τ)＝aτ
1/n。
Above-mentioned two formulas are found the solution are obtained:
So the shear rate at capillary tube 9 inwall places is:
In actual measurement, by the pressure of sampling tube 10 interior wound fluids is sampled, calculate pressure differential Δ P and flow Q between double sampling, and according to mechanical parameter L, the R of capillary tube 9, adopt method of least square to carry out curve fit, obtain a and n value, can obtain the curve that viscosity changes with the size of shear rate of watching quietly of wound fluid, this slope of a curve is the viscosity of wound fluid.
In addition, size and the temperature of viscosity are contacted directly, temperature is higher, and viscosity is less, and temperature is lower, viscosity is larger, so variations in temperature is also an important parameter that affects viscosity, existing test tube 11 is positioned in water bath with thermostatic control 12, and invisible spectro temperature remains unchanged, so in the viscosity testing process of wound fluid, can ignore temperature to the impact of wound fluid viscosity.
In the connecting line of liquid-collecting bottle and negative pressure source, by controlling the switch of electromagnetic valve 13, extract wound fluid to sampling tube.
Referring to Fig. 4, Figure 4 shows that the graph of relation of fluid shear stress and shear rate, as can be seen from Figure 4:
Cut and answer attenuation curve: the viscosity of fluid increases with shear rate and reduces;
The Newtonian fluid curve: the viscosity of fluid does not change with shear rate, is constant;
Cut and should strengthen curve: the viscosity of fluid increases with shear rate.
Embodiment two
The difference of the present embodiment and embodiment one is, wound fluid viscosity checkout gear comprises rotating cylinder viscometer, and this rotating cylinder viscometer replaces the capillary viscosimeter in embodiment one.
The rotating drum of rotating cylinder viscometer and liquid-collecting bottle conducting, and with the negative pressure source conducting, by with the connecting line of negative pressure source in control valve is set, make that in liquid-collecting bottle, wound fluid can flow in rotating drum, then rotating cylinder viscometer is measured it, obtains the viscosity of wound fluid in liquid-collecting bottle.
The shearing stress of the wound fluid that this rotating cylinder viscometer comprises shearing stress detection module for detection of the shearing stress of wound fluid, draw for detection of the shear rate detection module of the shear rate of wound fluid and according to detection and the data processing unit that the shear rate computing draws the viscosity of wound fluid.
All the other are all consistent with embodiment one, repeat no more herein.
Be below only the preferred embodiment of the present invention, should be pointed out that above-mentioned preferred implementation should not be considered as limitation of the present invention, protection scope of the present invention should be as the criterion with the determined scope of claim.For those skilled in the art, without departing from the spirit and scope of the present invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (9)
1. negative pressure wound treating system that can detect the wound fluid viscosity comprises:
Liquid-collecting bottle is collected wound fluid;
Negative pressure wound therapy device is comprised of negative pressure source and controller;
The wound external member is filled and wound closure, is communicated with liquid-collecting bottle by connection tube;
It is characterized in that, also comprise:
Wound fluid viscosity checkout gear, detect the viscosity of wound fluid in liquid-collecting bottle, be specially: the shear rate that detects wound fluid in liquid-collecting bottle, then detect this shear rate the wound fluid that obtains in advance watch quietly viscosity with the change curve of shear rate on the slope of correspondence position, this slope is the viscosity of wound fluid.
2. the negative pressure wound treating system that detects the wound fluid viscosity as claimed in claim 1, is characterized in that, also comprises:
Data acquisition and blood processor gather and process wound fluid viscosity checkout gear and detect the data that obtain, and the numerical value after stores processor.
3. the negative pressure wound treating system that detects the wound fluid viscosity as claimed in claim 1, is characterized in that, described wound fluid viscosity checkout gear comprises capillary viscosimeter, detects the viscosity of wound fluid in liquid-collecting bottle.
4. the negative pressure wound treating system that detects the wound fluid viscosity as claimed in claim 3, is characterized in that, described capillary viscosimeter comprises:
The pressure detecting module detects the capillary tube pressure differential at two ends up and down;
The flow monitoring module, control and monitoring stream are crossed the flow of wound fluid capillaceous.
5. the negative pressure wound treating system that detects the wound fluid viscosity as claimed in claim 4, it is characterized in that, described capillary viscosimeter also comprises arithmetic element, calculates the viscosity of wound fluid according to the pressure differential at two ends, capillary tube up and down and the flow that flows through wound fluid capillaceous.
6. the negative pressure wound treating system that detects the wound fluid viscosity as claimed in claim 1, is characterized in that, described wound fluid viscosity checkout gear comprises rotating cylinder viscometer.
7. the negative pressure wound treating system that detects the wound fluid viscosity as claimed in claim 6, is characterized in that, described rotating cylinder viscometer comprises:
The shearing stress detection module, the shearing stress of wound fluid in the detection liquid-collecting bottle;
The shear rate detection module, the shear rate of wound fluid in the detection liquid-collecting bottle.
8. the negative pressure wound treating system that detects the wound fluid viscosity as claimed in claim 7, it is characterized in that, described rotating cylinder viscometer also comprises a data processing unit, the viscosity that calculates wound fluid according to shearing stress and the shear rate of wound fluid in liquid-collecting bottle.
9. the negative pressure wound treating system that detects the wound fluid viscosity as claimed in claim 1, is characterized in that, described wound fluid viscosity checkout gear comprises Ubbelohde viscometer or Engler viscometer.
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| CN 201010550205 CN101983729B (en) | 2010-11-17 | 2010-11-17 | Negative pressure wound therapy system capable of detecting viscosity of wound exudates |
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| CN 201010550205 CN101983729B (en) | 2010-11-17 | 2010-11-17 | Negative pressure wound therapy system capable of detecting viscosity of wound exudates |
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| CN101983729B true CN101983729B (en) | 2013-05-15 |
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| WO2012065308A1 (en) * | 2010-11-19 | 2012-05-24 | 惠州市华阳多媒体电子有限公司 | Negative pressure wound therapy system capable of detecting wound exudate viscosity |
| CN104645428B (en) * | 2015-02-12 | 2016-08-24 | 昆山韦睿医疗科技有限公司 | A kind of liquid collector for storing wound fluid and negative pressure treatment equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1847849A (en) * | 2004-04-13 | 2006-10-18 | 中国科学院力学研究所 | Real-time body blood viscosity measuring instrument |
| CN101600464A (en) * | 2006-10-17 | 2009-12-09 | 蓝天医疗集团有限公司 | Auxiliary powered negative pressure wound therapy apparatuses and method |
| CN101819124A (en) * | 2009-02-27 | 2010-09-01 | 北京普利生仪器有限公司 | Method for automatically measuring blood viscosity |
| CN201880078U (en) * | 2010-11-17 | 2011-06-29 | 惠州市华阳多媒体电子有限公司 | Negative pressure wound healing system capable of detecting wound exudate viscosity |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1847849A (en) * | 2004-04-13 | 2006-10-18 | 中国科学院力学研究所 | Real-time body blood viscosity measuring instrument |
| CN101600464A (en) * | 2006-10-17 | 2009-12-09 | 蓝天医疗集团有限公司 | Auxiliary powered negative pressure wound therapy apparatuses and method |
| CN101819124A (en) * | 2009-02-27 | 2010-09-01 | 北京普利生仪器有限公司 | Method for automatically measuring blood viscosity |
| CN201880078U (en) * | 2010-11-17 | 2011-06-29 | 惠州市华阳多媒体电子有限公司 | Negative pressure wound healing system capable of detecting wound exudate viscosity |
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