CN102058932B - Negative pressure control device and control method of negative pressure treatment system - Google Patents

Negative pressure control device and control method of negative pressure treatment system Download PDF

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CN102058932B
CN102058932B CN 201010597015 CN201010597015A CN102058932B CN 102058932 B CN102058932 B CN 102058932B CN 201010597015 CN201010597015 CN 201010597015 CN 201010597015 A CN201010597015 A CN 201010597015A CN 102058932 B CN102058932 B CN 102058932B
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negative pressure
control
value
negative
collection canister
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CN 201010597015
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CN102058932A (en
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隗刚
郑灿阳
黄海明
菅冀祁
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惠州市华阳医疗电子有限公司
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Abstract

本发明公开一种负压治疗系统的负压控制装置,包括:抽气机构,通过对集液瓶内抽气而为集液瓶提供负压;电控阀,用于将外部气体导入集液瓶内;压力监测模块,用于监测集液瓶内的实际负压值;负压控制模块,将实际负压值与预定负压值比较,根据比较结果,同时控制抽气机构的抽气量以及电控阀的进气量,使集液瓶内的实际负压值接近或达到预定负压值。 The present invention discloses a negative pressure control apparatus for a vacuum treatment system, comprising: a suction means, negative pressure provided by the fluid collection canister to the suction collection canister; electrically controlled valve, for introducing outside air into the fluid collection bottle; pressure monitoring module, for monitoring the actual value of the negative pressure in the collection canister; negative pressure control module, comparing the actual value and the predetermined negative pressure value is negative, based on the comparison result, while controlling the amount of suction and exhaust means the intake air amount of the electrically controlled valve, so that the actual collection canister reaches a predetermined negative pressure value or a negative value close. 本发明的负压治疗系统的负压控制装置,可使医护人员能够根据患者的实际情况调控负压的大小,使负压大小的渐变控制能够实现,减少患者在负压治疗时因压力骤变而引起的伤口不适或者疼痛。 When the negative pressure control apparatus of the vacuum therapy system of the present invention enables medical personnel capable of regulating the size of the negative pressure, so that control of the negative pressure gradient according to the actual size of the patient can be achieved, reducing the negative pressure in the treatment of patients due to sudden changes in pressure and a wound caused by pain or discomfort. 本发明还公开一种负压治疗系统的控制方法。 The present invention also discloses a method for controlling negative pressure therapy system.

Description

负压治疗系统的负压控制装置 The negative pressure control apparatus of the vacuum therapy system

技术领域 FIELD

[0001 ] 本发明涉及负压伤口治疗设备技术领域,尤其涉及一种负压伤口治疗系统的负压控制装置以及控制方法。 [0001] The present invention relates to negative pressure wound therapy device technical field, in particular relates to an apparatus and method for controlling negative pressure of the negative pressure wound treatment control systems.

背景技术[0002]负压伤口治疗设备,美国称为 Negative Pressure Wound Therapv Devices,简称为NPWT,其原理为通过对伤口处施加负压,来促进伤口的愈合。 [0002] negative pressure wound therapy device, referred to U.S. Negative Pressure Wound Therapv Devices, referred to as NPWT, the principle of applying a negative pressure to the wound site through to promote wound healing. 根据美国近10年来的临床表明,该设备对各种急慢性的伤口处理有着良好的愈合效果。 According to the United States nearly 10 years of clinical indicate that the device has a good healing effect on a variety of acute and chronic wound treatment.

[0003] 一般地,负压伤口治疗系统包括负压伤口治疗设备、伤口处套件以及用来收集伤口处渗出液的容器(这里称为此容器为集液瓶)。 [0003] Generally, a negative pressure wound therapy system comprises a negative pressure wound therapy device, the wound package and a container for collecting wound exudate (this container is referred to herein as fluid collection canister). 其中,伤口处套件用于封闭伤口,制造负压空间。 Wherein the wound closure kit for the wound, producing a negative pressure space. 负压伤口治疗设备用于创造出所需要的伤口负压。 Negative pressure wound therapy device for creating negative pressure wound require. 参见图1,图中所示为一种常见负压伤口治疗系统。 Referring to Figure 1, it is a common negative pressure wound therapy system shown in FIG. 虚线框内为负压伤口治疗设备8 ;1为人体伤口周围皮肤组织;伤口处填充物2将人体伤口处覆盖;在伤口处填充物2的上方设置伤口封闭物3,将伤口封闭,伤口填充物2通过连接管4连接到集液瓶5上,从而将来自伤口的渗出液导引至集液瓶5中,通过集液瓶5收集来自伤口的渗出液,集液瓶5的另一端与可调气流量的抽气泵6连接,由可调气流量的抽气泵6提供负压,为伤口渗出液流至集液瓶5提供动力;可调气流量的抽气泵6连接一中央控制模块7,由中央控制模块7对可调气流量的抽气泵6实现控制。 Within the dashed box for the negative pressure wound therapy device 8; 1 is a human skin tissue surrounding the wound; wound filler body 2 to cover the wound; above was filled in the wound 2 is provided a wound closure 3, the wound closure, the wound packing 2 were connected via a connecting pipe 4 to the fluid collection canister 5 to thereby guide the wound exudates from the fluid collection canister 5 to the collected exudate from the wound through the fluid collection canister 5, another fluid collection canister 5 one end of the adjustable air flow suction pump 6 is connected to a negative pressure by an adjustable air flow suction pump 6, the flow of wound exudate to provide power to the fluid collection canister 5; air flow rate adjustable pump 6 is connected to a central suction the control module 7, the central control module 7 by the pair of adjustable air flow suction pump 6 to achieve control.

[0004] 对于NPWT系统来说,间歇的负压工作方式在治疗上是有益的。 [0004] For NPWT systems, negative pressure is intermittently working therapeutically beneficial. 这得益于间歇负压对伤口末端血流速度的影响。 Effect on the ends of the wound thanks to the intermittent suction flow velocity. 根据已知的各种文献的研究结果,当负压作用于伤口时,伤口末端血流速度会明显加快,血流的加速将带来更多的各种伤口恢复所必需的营养物质,如氧气等。 According to research various known documents, when the negative pressure is applied to the wound, the wound end of the flow velocity will be significantly accelerated, acceleration of blood flow will bring more nutrients necessary for a variety of wound healing, such as oxygen Wait. 这种血流加快作用的时间一般不长,在5分钟左右后会恢复到正常水平,所以一般间歇的治疗方式采用5分钟负压、2分钟恢复来作用于伤口,以促进伤口的愈合速度。 Such blood flow accelerating effect is generally not a long time, after about 5 minutes will be restored to normal levels, so treatment is generally 5 minutes using a batch vacuum for 2 minutes to recover the role of the wound to promote wound healing. 临床试验的结果也证实,这样做是有效的。 Results of clinical trials also confirmed that doing so is effective. 现有的负压创面治疗技术,往往配合伤口处敷料一起使用。 Conventional negative pressure wound therapy, often used in conjunction with wound dressings. 伤口处敷料的一个重要功能,在于制造负压空间,填充伤口,并平均分散伤口处压力。 An important feature of the wound dressing, is to produce a negative pressure space, filled with the wound, and wound evenly distributed pressure. 现有技术中的负压伤口治疗系统,其负压的控制非常机械化,参见图2,图2显示的是间歇治疗模式下,现有技术的负压控制图,从图2中可以看出,集液瓶内从常压在极短时间内达到较高的预定负压值,保持此负压值治疗一段时间后,再从此较高的预定负压值在极短的时间内变为常压,保持常压一段时间后再进行下一个重复的周期,在此过程中,负压没有逐渐改变的过程,在治疗开始、结束或者间歇治疗期间的负压变化都是在很短的时间内完成改变。 Negative pressure wound therapy system of the prior art, which controls the negative pressure is mechanized, see FIG. 2, FIG. 2 shows the batch treatment mode, the negative pressure control diagram of a prior art, can be seen from Figure 2, collection canister reaches a very short time at a high pressure from the predetermined negative pressure value, the negative value of this holding period of treatment, and then from a high negative pressure value within a predetermined period of time becomes very short atmospheric , maintaining the process pressure for a period of time before the next repetition period, in this process, no negative pressure gradually changes, at the beginning of treatment, the end of the negative pressure variation or intermittently during treatment is done in a very short period of time change. 根据NPWT各临床运用所反馈的患者信息显示,大部分的患者,在使用时,都会因为气压的骤然变化而产生疼痛感。 According to information of each patient clinical use of NPWT the feedback shows that most of the patients, when used, will be because of sudden changes in pressure to produce pain. 这是因为伤口处负压的快速增加,会导致伤口处填充敷料对伤口产生挤压;而伤口处负压的快速释放,会导致伤口处填充敷料的扩张膨胀,也对伤口产生摩擦。 This is because the rapid increase in negative pressure at the wound, the wound dressing will cause filling of the wound extrusion is generated; and the negative pressure at the wound quick release can cause the wound dressing to fill expansion expands, the friction of the wound. 而且,从图2中可以看出,现有的负压控制,其每一个周期,预定负压值都一样,每一个周期经历的时间也一样,而在患者伤口的治疗过程中,一开始,伤口伤势比较严重、恶化,所需的负压较高,到了后期,伤口开始愈合的时候,不需要较大的负压,而如果继续提供负压的化,会对伤口的愈合产生副作用,影响伤口愈合。 Further, it can be seen from Figure 2, the conventional negative pressure control, each of a period are the same predetermined negative pressure value, the elapsed time of each cycle is the same, whereas the wound of a patient during treatment, initially, wound more serious injuries, deterioration, high vacuum required, at a later stage, when the wounds begin to heal, does not require a large negative pressure, and if it continues to provide negative pressure technology, will heal the wound of side effects, the impact wound healing. 发明内容 SUMMARY

[0005] 本发明的目的在于提供一种负压伤口治疗系统的负压控制装置以及方法,使集液瓶内的负压可以逐渐变化,使得负压的变化可控,减少由于突然的压力改变而对患者产生的疼痛感。 [0005] The object of the present invention to provide a negative pressure control apparatus and method for a negative pressure wound treatment system, the negative pressure collection canister may be gradually changed, so that the change in the negative pressure control, reduce the sudden pressure change the sense of pain produced.

[0006] 同时,本发明的目的也在于通过对负压的控制,产生任意曲线的负压治疗方式,通过控制最佳的治疗曲线,既能对患者进行有益的治疗,同时能从一定程度上缓解患者的不适。 [0006] Meanwhile, the object of the present invention is also characterized by controlling the negative pressure, a negative pressure treatment of any curve, both a beneficial therapeutic patient treatment by controlling the optimal curve, while a certain extent from the ease the patient's discomfort.

[0007] 本发明的负压伤口治疗系统的负压控制装置,包括: [0007] The negative pressure of the negative pressure wound therapy system of the present invention, a control apparatus, comprising:

[0008] 抽气机构,通过对集液瓶内抽气而为集液瓶提供负压; [0008] The suction means, negative pressure provided by the fluid collection canister to the suction collection canister;

[0009] 电控阀,用于将外部气体导入集液瓶内; [0009] The electrically controlled valve, for introducing outside air into collection canister;

[0010] 压力监测模块,用于监测集液瓶内的实际负压值; [0010] The pressure monitoring module, for monitoring the actual value of the negative pressure in the collection canister;

[0011 ] 负压控制模块,将实际负压值与预定负压值比较,根据比较结果,同时控制抽气机构的抽气量以及电控阀的进气量,使集液瓶内的实际负压值接近或达到预定负压值。 [0011] the negative pressure control module, comparing the actual value and the predetermined negative pressure value is negative, based on the comparison result, while controlling the intake air amount and the exhaust valve electrically controlled pumping mechanism so that the actual negative pressure collection canister value approaches or reaches a predetermined negative pressure value.

[0012] 优选地,所述负压控制模块包括: [0012] Preferably, the vacuum control module comprises:

[0013] 运算处理单元,将实际负压值与预定负压值比较,根据比较结果,发出控制指令; [0013] The arithmetic processing unit compares the actual value and the predetermined negative pressure value is negative, based on the comparison result, a control command;

[0014] 电控单元,根据所述控制指令控制抽气机构的抽气量以及电控阀的进气量。 [0014] The electronic control unit according to the intake air amount control command from the control amount and the suction pumping means electrically controlled valve.

[0015] 优选地,所述电控单元通过控制所述抽气机构的电机的旋转频率来控制抽气机构的抽气量。 [0015] Preferably, the electronic control unit controls the amount of suction by the suction means controlling the rotation frequency of the motor of the pumping mechanism.

[0016] 优选地,所述电控单元通过控制所述电控阀的排气孔的大小来控制进气量。 [0016] Preferably, the electronic control unit controls the intake air amount by controlling the size of the exhaust hole of the electrically controlled valve.

[0017] 优选地,所述电控单元控制所述抽气机构的电压以及电控阀的电压,以控制抽气机构的抽气量、电控阀的进气量。 [0017] Preferably, the voltage and electrically controlled valve means for controlling the suction of the electronic control unit to control the suction capacity of the suction means, the intake air amount of the electrically controlled valve.

[0018] 优选地,所述电控单元控制所述抽气机构的电流以及电控阀的电流,以控制抽气机构的抽气量、电控阀的进气量。 [0018] Preferably, the current and the current of said electrically controlled valves controlling the suction means electronic control unit, to control the amount of intake air suction of the suction means, the electrically controlled valve.

[0019] 优选地,所述运算处理单元设有DA模块,用于向电控单元发送电压信号。 [0019] Preferably, the arithmetic processing unit is provided with DA module, configured to send a voltage signal to the electronic control unit.

[0020] 优选地,所述运算处理单元设有PWM模块,用于向电控单元发送电压信号。 [0020] Preferably, the PWM processing unit is provided with means for transmitting a voltage signal to the electronic control unit.

[0021 ] 优选地,所述运算处理单元设有电压控制电流模块,用于向电控单元发送电流信号。 [0021] Preferably, the arithmetic processing unit is provided with a voltage control current module, configured to send a current signal to the electronic control unit.

[0022] 优选地,所述预定负压值随时间变化。 [0022] Preferably, the predetermined negative pressure value varies with time.

[0023] 优选地,所述预定负压值随时间呈曲线变化。 [0023] Preferably, the predetermined negative pressure value changes over time in a curve.

[0024] 优选地,所述负压控制模块控制负压治疗过程中的负压振幅缓慢变小。 [0024] Preferably, the suction control module controls the amplitude of the negative pressure in the negative pressure treatment becomes smaller slowly.

[0025] 优选地,在间歇治疗模式下,所述负压控制模块控制每个周期经历的时间逐渐变小。 [0025] Preferably, in the intermittent treatment mode, the control module controls the negative pressure experienced by each cycle becomes gradually smaller.

[0026] 本发明的负压伤口治疗系统的负压控制方法,包括: [0026] The method of controlling the negative pressure of the negative pressure wound therapy system of the present invention, comprising:

[0027] I)对集液瓶内进行抽气,为集液瓶提供负压; [0027] I) of the collection canister is evacuated, a negative pressure to the fluid collection canister;

[0028] 2)同时,将外部气体导入集液瓶内; [0028] 2) At the same time, outside air introduced into the collection canister;

[0029] 3)监测集液瓶内的实际负压值; [0029] 3) the actual value of the negative pressure collection canister of monitoring;

[0030] 4)将实际负压值与预定负压值比较,根据比较结果,通过同时控制抽气量以及进气量,使集液瓶内的实际负压值接近或达到预定负压值。 [0030] 4) comparing the actual value and the predetermined negative pressure value is negative, based on the comparison, and by simultaneously controlling the amount of intake air suction, so that the actual value of the negative pressure collection canister approaches or reaches a predetermined negative pressure value. [0031] 本发明的负压伤口治疗系统的负压控制装置,由于设置用于对集液瓶抽气的抽气机构、用于对集液瓶导入气体的电控阀、用于负压控制的负压控制模块,负压控制模块通过同时控制抽气机构的抽气量以及电控阀的进气量而使集液瓶内的负压值能够按预定负压值变化,这样即可使医护人员能够根据患者的实际情况调控负压的大小,使负压大小的渐变控制能够实现,减少患者在负压治疗时因压力骤变而引起的伤口不适或者疼痛。 [0031] The negative pressure control apparatus for a negative pressure wound therapy system of the present invention, since the pumping mechanism for pumping fluid collection canister, the electrically controlled valve for introducing gas to the fluid collection canister, a negative pressure control the negative pressure control module, the control module so that the negative pressure set negative pressure value of the liquid bottle through suction means simultaneously controlling intake air amount and the exhaust valve is electrically controlled by a predetermined negative pressure value can be varied, so that health care can make capable of regulating the negative pressure in the art according to the actual size of the patient, so that the size of the negative pressure gradient control can be achieved, reduce wound pain or discomfort in the treatment of the negative pressure due to the pressure caused by sudden changes. 医护人员也可根据患者的实际情况,按照事先制作的预定负压值变化曲线来控制集液瓶中的负压,既能对患者进行有益的治疗,同时能从一定程度上缓解患者的不适。 Health care professionals according to the actual situation of the patient, according to a predetermined negative pressure value prepared in advance to control the negative pressure curve of the fluid collection canister, both beneficial therapeutic patient, while from the patient to some extent alleviate the discomfort.

附图说明[0032] 图I是现有负压伤口治疗系统的结构示意图; BRIEF DESCRIPTION [0032] FIG. I is a schematic diagram of the conventional negative pressure wound therapy system;

[0033] 图2是现有负压伤口治疗系统的负压随时间的变化图; [0033] FIG 2 is a variation with time of negative pressure existing negative pressure wound therapy system;

[0034] 图3是PWM低占空比时的电压输出示意图; [0034] FIG. 3 is a schematic diagram of the output voltage when a PWM duty cycle is low;

[0035] 图4是PWM高占空比时的电压输出示意图; [0035] FIG. 4 is a schematic view of the output voltage PWM duty ratio of high;

[0036] 图5是本发明的负压伤口治疗系统的负压控制装置的结构示意图; [0036] FIG. 5 is a schematic structural diagram of a negative pressure of negative pressure wound therapy system of the present invention is a control apparatus;

[0037] 图6是本发明的负压伤口治疗系统的负压控制装置的使用状态图; [0037] FIG. 6 is a state diagram using the negative pressure control apparatus of the negative pressure wound therapy system of the present invention;

[0038] 图7是本发明的负压伤口治疗系统的负压控制装置工作时,集液瓶内的负压曲线图; [0038] FIG. 7 is a negative pressure of the negative pressure wound therapy system of the present invention, the control device is operated, a graph of the negative pressure of the fluid collection bottle;

[0039] 图8是本发明负压伤口治疗系统的负压控制装置的负压控制流程图; [0039] FIG. 8 is a negative pressure control apparatus negative negative pressure wound therapy system of the present invention is a control flowchart;

[0040] 图9是本发明的负压伤口治疗系统的负压控制装置可实现的不同负压曲线图。 [0040] FIG. 9 is a graph showing the different negative negative negative pressure wound therapy system of the control apparatus of the present invention may be implemented.

[0041] 图中有关附图标记如下: [0041] FIG related reference numerals are as follows:

[0042] I-伤口,2-伤口敷料,3-贴膜,4-连接管,5-集液瓶,6_抽气泵,7_控制器,8_负压伤口治疗设备,9-电控阀,10-压力监测模块。 [0042] I- wound, wound dressing 2-, 3- foil, connecting tube 4-, 5- fluid collection canister, 6_ suction pump, 7_ controller, 8_ negative pressure wound therapy device, 9- electrically controlled valve , 10-pressure monitoring module.

具体实施方式 Detailed ways

[0043] 以下结合附图,通过具体的实施例对本发明的负压伤口治疗系统的负压控制装置及控制方法进行详细说明。 [0043] conjunction with the drawings, detailed description and a control method by means of specific embodiment of the control of the negative pressure of the negative pressure wound therapy system of the present invention.

[0044] 本实施例中的负压伤口治疗系统的负压控制装置设置有PWM模块,通过控制占空比来控制抽气机构以及电控阀的电压。 [0044] The negative pressure control apparatus of the present embodiment is provided a negative pressure wound therapy system in embodiments of the PWM module, and means to control the suction control valve by controlling the duty ratio of the electric voltage.

[0045] 参见图3、图4,电容在输出为高电平时充电,高占空比跟低占空比对应的电压也不一致,因此可控制占空比实现O〜5V的电压输出。 [0045] Referring to FIG 3, FIG 4, when the output capacitor charge is high, high duty cycle with the duty cycle corresponding to the low voltage also inconsistent, and controls the duty cycle the output voltage O~5V.

[0046] 占空比为高电平的时间长度与低电平的时间长度的比值。 [0046] The length of time the duty ratio of high level and low level time length ratio. 占空比的控制通过有PWM模块的端口实现。 Duty cycle control port implemented by the PWM module.

[0047] 如图3、图4所示,占空比越大,获得的电压越大,当占空比为I时,即一直输出高电平,则电压输出为5V,相反,当占空比为另一个极端O时,即一直输出低电平,则电压输出为0V,占空比为O〜I之间,电压输出即在O〜5V之间。 [0047] FIG. 3, larger the duty cycle as shown in FIG. 4, the larger the voltage obtained when the duty ratio is I, i.e., the output has high level, the output voltage is 5V, the contrary, when the duty O ratio is the other extreme, i.e., the output has low level, the output voltage is 0V, the duty ratio between O~I, i.e., the output voltage between O~5V.

[0048] 参见图5,本实施例的负压伤口治疗系统的负压控制装置所应用的负压伤口治疗系统包括: [0048] Referring to FIG 5, a negative pressure wound therapy system of the negative pressure control means of negative pressure wound therapy system of the present embodiment is applied comprises:

[0049] 集液瓶5,用于收集伤口渗出液; [0049] 5 fluid collection canister for collecting wound exudate;

[0050] 负压伤口治疗设备8 ;[0051] 伤口套件,用于填充并封闭伤口1,包括伤口填充物-伤口敷料2、伤口封闭物-贴膜3,伤口敷料2通过连接管4与集液瓶5连通; [0050] The negative pressure wound therapy device 8; [0051] wound kit for filling and closing a wound, comprising a wound filler - 2 wound dressings, wound closure - film 3, the wound dressing 2 through the connecting pipe 4 and the liquid collection 5 bottles communication;

[0052] 参见图6,本实施例的负压伤口治疗系统的负压控制装置包括: [0052] Referring to Figure 6, the negative pressure control apparatus of a negative pressure wound therapy system of the present embodiment includes:

[0053] 压力监控模块10,监测集液瓶内的实际负压值; [0053] The pressure monitoring module 10 monitors the actual collection canister negative pressure value;

[0054] 抽气泵6,对集液瓶内进行抽气,为集液瓶5提供负压; [0054] The air pump 6, a collection canister is evacuated, the negative pressure provided to fluid collection canister 5;

[0055] 电控阀9,将外部气体导入集液瓶内,以调节集液瓶内的负压,该电控阀9在负压治疗过程中处于常开状态; [0055] The electrically controlled valves 9, introducing outside air into collection canister, in order to adjust the vacuum collection canister, the electrically controlled valve 9 in a normally open state in the negative pressure during treatment;

[0056]负压控制模块,设置在控制器7中,将压力监测模块监测得到的集液瓶内的实际负压值与预定负压值比较,根据比较结果,通过同时控制抽气泵6的抽气量以及电控阀的进气量,而使集液瓶内的负压接近或达到预定负压值。 [0056] the negative pressure control module, is provided in the controller 7, the actual value of the negative pressure collection canister monitoring module monitors the negative pressure obtained is compared with a predetermined value, based on the comparison, by simultaneously controlling the suction pump 6 is pumping intake air amount and the air amount of the electrically controlled valve, the negative pressure in the collection canister approaches or reaches a predetermined negative pressure value.

[0057] 其中,负压控制模块设有两个具有PWM模块的端口,分别连接抽气泵6和电控阀9,通过控制占空比,控制相应的电压输出,进而通过控制抽气泵6的转速和电控阀9的排气孔的大小来控制抽气速率和进气速率。 [0057] wherein the vacuum control module is provided with two ports PWM modules are connected to air pump 6 and the electrically controlled valve 9, by controlling the duty cycle, the control voltage corresponding to the output, and further by controlling the suction speed of the pump 6 size and electrically controlled valve 9 of the vent to control the rate of pumping and intake rate.

[0058] 其中,抽气泵6和电控阀9是负压伤口治疗系统通过电压精确控制实现负压在预定负压值附近变化的关键元器件。 [0058] wherein the air pump 6 and valve 9 is electronically controlled negative pressure wound therapy system to achieve precise control of the negative pressure change in the vicinity of critical components by a predetermined negative voltage value.

[0059] 本实施例中的负压伤口治疗系统的负压控制装置由于通过对抽气泵6和电控阀9的同时控制,而能够实现负压值按时间缓慢变化,可以按照图7中所示的负压治疗曲线中的预定的负压值变化;在间歇治疗模式下,本发明的负压伤口治疗系统的负压控制装置控制负压按图7所示的负压曲线图变化,实现负压的缓慢变化。 [0059] The negative pressure control apparatus of a negative pressure wound therapy system in the present embodiment by simultaneously since the suction pump 6 and the electrically controlled control valve 9, it is possible to achieve negative pressure slow change in time value, as in Figure 7 the predetermined negative pressure value change curve shown in negative pressure therapy; in the treatment of intermittent mode, the negative pressure control means of the negative pressure wound therapy system of the present invention controls the negative pressure by the negative pressure variation graph shown in Figure 7, to achieve negative pressure change slowly. 当间歇工作时,集液瓶内的压力需要从常压到预定负压值,再从预定负压值变化到常压,根据需要,决定需要重复的次数,假定预定负压值为-80mmhg,现有的负压伤口治疗系统使用0V,5V直接决定抽气泵、电控阀的开闭,在较短的时间里使集液瓶内的压力由常压变为-80mmhg,然后持续一定时间后,在较短的时间里使集液瓶内的压力由-SOmmhg变为常压,给患者造成疼痛感。 When the intermittent operation, the pressure collection canister needs negative pressure from normal pressure to a predetermined value, then a change from a negative value to a predetermined pressure, if necessary, be repeated a number of decisions, assume that the predetermined value is -80 mmHg vacuum, conventional negative pressure wound therapy system 0V, 5V directly determine the suction pump, electrically-controlled on-off valve, the pressure from atmospheric collection canister -80mmhg changed in a shorter time, and then after a predetermined time duration , in a short period of time the pressure of a collection canister -SOmmhg becomes atmospheric, causing pain to the patient. 本发明负压伤口治疗系统设置抽气泵6以及电控阀9,运用具有PWM模块的端口对抽气泵6以及电控阀9实现O〜5V之间电压的任意输出,调节集液瓶内从常压到预定负压值、再从预定负压值到常压的缓慢变化,能够使使用者慢慢适应负压的改变,从而使伤口减少不必要的疼痛感。 Negative pressure wound therapy system of the present invention is provided a suction pump 6 and the electrically controlled valve 9, with the use of the port for any PWM module output suction pump 6 and an electrically controlled valve 9 for voltage between the O~5V adjusted from the normally collection canister negative pressure to a predetermined value, then the value from the predetermined slowly varying negative pressure to the atmospheric pressure, enables the user to gradually adapt to changes in a negative pressure, so that the wound to reduce unnecessary pain. 在实际应用中,医护人员还可以根据患者的不同情况可以设定不同的负压治疗曲线,通过控制抽气泵6和电控阀9,使得不同的时刻集液瓶内的负压不同,使集液瓶内的负压按照设定的负压曲线变化。 In practice, the medical staff can be set depending on the patient of different negative pressure therapy curve, by controlling the suction pump 6 and the electrically controlled valve 9, so that the negative pressure at different times different collection canister, the collector negative pressure bottle was set in accordance with the change of the negative pressure curve.

[0060] 其中,图7中负压曲线上升的斜率跟抽气泵6的抽气速率有关,而抽气速率又和抽气泵6的电机的转速有关,转速越快,到达预定负压值就越快。 [0060] wherein the negative pressure curve in FIG. 7 with the rising slope of the suction pump 6 pumping rate, whereas the rate of pumping and the suction pump 6 and the motor speed related, the faster the speed, the negative pressure reaches a predetermined value, the more fast. 当开始抽气进行负压治疗时,对于较低的预定负压值,可以控制抽气泵6以较快的抽气速率运转,快速达到预定值;而对于较高的预定负压值,如果抽气速率也非常快则使用者将感觉到明显的不适感,特别是间歇治疗模式下,高低负压在治疗过程中经常变化,因此,在负压曲线上升的前半段,负压较低,要控制抽气泵以较快速率抽气,到了后半段时,越来越接近振幅(即最大预定负压值),设定的负压曲线的斜率趋于0,意味着要控制抽气泵以较慢的速率抽气。 When starting the suction negative pressure therapy, a predetermined negative pressure value for the low, air pump 6 may be controlled at a faster pumping speed operation, rapidly reaches a predetermined value; for higher predetermined negative pressure value, if the pumping gas production rate is very fast the user will feel significant discomfort, particularly intermittent therapy mode, the negative pressure level often vary during the treatment, and therefore, the negative pressure in the first half of the curve rise, the negative pressure is low, to controlling the exhaust air pump at a faster rate, the time to half, closer to the amplitude (i.e., the predetermined maximum negative value), the slope set negative pressure tends to zero, which means to control the air pump at a relatively slow rate pumping.

[0061] 同样地,负压曲线下降的斜率跟电控阀9的进气速率相关,而进气速率与电控阀的流道孔径大小有关,孔径越大,进气速率越快,集液瓶内负压较快下降。 [0061] Likewise, the negative pressure decrease slope of the curve with the intake rate related to the electrically controlled valve 9, the intake flow channel rate and pore size of the electrically controlled valve is related to the larger pore size, the faster the rate of intake air, header bottle of negative pressure to drop rapidly. 孔径的大小可以通过控制电控阀的电压来实现。 The pore size can be achieved by controlling the voltage-controlled valves. 当负压从振幅降低到常压过程中,处于较低的预定负压值时,负压的变化对患者的影响很小,可以使电控阀孔径开大点,使负压尽快下降。 When the negative pressure from the atmospheric pressure to reduce the amplitude during a predetermined negative pressure at a lower value, the negative pressure change has little effect on the patient, the electrically controlled valve can be made large pore opening point, as soon as the negative pressure drops. 而处于较高的预定负压值时,如果进气速率过大,患者会感觉到明显的不适感,特别是在间歇治疗模式下,高低负压在治疗过程中经常变化。 While a predetermined negative pressure at a higher value, if the intake rate is too high, the patient will feel significant discomfort, especially in the treatment of intermittent mode, the negative pressure level often changes during the treatment. 因此,在负压下降过程中,在下降前半段时,孔径开的很小,缓慢地增加,到了后半段,此时负压值相对较低,就可以用大的孔径迅速进气,使负压迅速降低。 Thus, the negative pressure in the decreasing process, when the first half of the drop, the open aperture is very small, gradually increasing to half, the negative pressure is relatively low at this time, you can use a large aperture fast intake, so negative pressure decreases rapidly. 曲线的斜率即表现在孔径大小上,当负压开始下降时,孔径开得很小,然后慢慢变大,到后半段时,孔径可全部开启,使集液瓶内的气压迅速回到常压。 Slope of the curve at the pore size that is manifested when the negative pressure is decreased, the pore size was very small, then gradually increased, while the second half, the aperture can be fully open, so that the collection canister quickly returned to atmospheric pressure atmospheric pressure.

[0062] 参见图8,在负压控制中,压力监测模块10连接到集液瓶处,监测集液瓶内的实际负压值,负压控制模块将此实际负压值与负压曲线处的预定负压值比较,判断是否需要进行抽气,具体如下: [0062] Referring to Figure 8, in the negative pressure control, the pressure monitoring module 10 is connected to a fluid collection canister, the actual negative pressure value monitor collection canister, the vacuum control module of this actual value is negative at a negative pressure curve comparing a predetermined negative value, it is determined whether or not pumping is required, as follows:

[0063] 如果在抽气过程中,监测到的实际负压值低于负压曲线处的预定负压值时,则计算出需要减少的抽气泵PWM的占空比,从而使集液瓶中的实际负压值加大,接近或达到预定负压值;如果在抽气过程中,监测到的实际负压值高于负压曲线处的预定负压值时,则计算出需要增加的抽气泵PWM的占空比。 [0063] If the suction process, the actual monitored negative pressure value lower than the predetermined negative pressure value at the negative pressure curve, calculate the PWM duty ratio of the need to reduce the suction pump so that the fluid collection canister the actual value of the increased negative pressure, approached or reached the predetermined negative pressure value; if the extraction process, the actual monitored negative pressure value is higher than the predetermined negative pressure value at the negative pressure curve, calculate the required increase in the pumping pump PWM duty cycle.

[0064] 如果不在抽气过程中,即集液瓶内呈进气状态,监测到的实际负压值低于负压曲线处的预定负压值时,计算需要增加的电控阀PWM的占空比,否则计算需要减少电控阀PWM的占空比。 [0064] If not in the process of extraction, i.e., as a collection canister intake state, the actual monitored negative pressure value lower than the predetermined negative pressure value at the negative pressure curve, calculate the need to increase the electrically controlled valve PWM for air ratio, or the electrically controlled valve to reduce the need to calculate the PWM duty cycle. 通过这一控制过程,使得集液瓶中的实际负压值按照预先设定的负压曲线变化。 By this control process, so that the actual value of the negative pressure of the negative pressure fluid collection canister according to a preset curve.

[0065] 在采用本发明的负压控制装置进行的具体治疗过程中,可以根据患者的伤口大小、伤口严重程度、伤口的类型以设定不同的负压值进行负压治疗,或设定不同的治疗模式。 [0065] In a particular course of treatment the negative pressure control apparatus of the present invention, it is possible to set a different value according to the negative pressure wound size of the patient, the severity of the wound, type of wound treatment of negative pressure, or set different treatment modalities. 例如,在负压治疗过程中,采用间歇治疗模式时,患者需用125mmhg的最大负压治疗,间歇高压治疗时间为5分钟时,可以设定负压振幅及间歇治疗中每个周期所经历的时间在负压治疗过程中缓慢变化变小。 For example, the negative pressure in the treatment process, when a batch treatment mode, the maximum negative pressure therapy patients required 125mmhg intermittently high pressure treatment time was 5 minutes, and the amplitude of the negative pressure can be set in each cycle of intermittent treatment experienced in the course of time slowly varying negative pressure therapy becomes small. 如设定整个治疗过程为24小时,根据伤口情况,可设定24小时之后负压变化为75mmhg,治疗时间也可以先前设定的5分钟变为3分钟。 The entire treatment process is set to 24 hours, according to the wound, the negative pressure can be set for the 75mmHg change after 24 hours, the treatment time is 5 minutes it becomes possible to previously set for 3 minutes. 之所以要使负压以及治疗时间减小,是因为在伤口治疗过程中,伤口最初是恶化的、严重的,治疗一段时间后伤口好转之后逐渐愈合,在愈合过程中,如果仍然利用伤口治疗最初的预定负压值以及负压治疗时间,显然是不太合适的,所以在整个治疗过程中,要在治疗的不同阶段采用不同的负压值、不同的治疗时间,使得在愈合过程中,负压降低、负压治疗时间变短,促进伤口的治疗,以免因一直采用较大的负压、较长的负压治疗时间而出现副作用。 The reason for including the negative pressure and the treatment time is reduced, because the wound healing process, wound initially deteriorated, serious, after a period of time after treatment improved healed wound, the healing process, if still using the original wound therapy the predetermined negative pressure value and a negative pressure treatment time, is clearly not appropriate, so that the whole course of treatment, to different vacuum values ​​in different stages of treatment of different treatment time, so that the healing process, the negative reduced pressure, vacuum treatment time is shortened, promotion of wound treatment, has been used so as to avoid a large negative pressure, the negative pressure therapy longer time side effects.

[0066] 参见图9,图9为本发明的负压伤口治疗系统的负压控制装置可以应用的不同负压曲线图,通过本发明中的负压控制装置,可以以负压与时间的负压曲线关系,使得负压治疗过程,可以根据不同的疾病选择不同的负压治疗曲线,负压按负压治疗曲线变化,达到最佳的治疗效果。 [0066] Referring to Figure 9, the negative pressure control apparatus of a negative pressure wound therapy system of FIG. 9 of the present invention can be applied to different negative pressure graph, by the negative pressure control apparatus of the present invention, the negative pressure may be time-negative pressure curve relationship such that the negative pressure treatment, vacuum treatment can select different curves depending on the disease, the negative pressure curve varies in negative pressure therapy, to achieve the best therapeutic effect.

[0067] 本发明的负压伤口治疗系统的控制方法,包括: [0067] The method for controlling a negative pressure wound therapy system of the present invention, comprising:

[0068] I)对集液瓶内进行抽气,为集液瓶提供负压; [0068] I) of the collection canister is evacuated, a negative pressure to the fluid collection canister;

[0069] 2)同时,将外部气体导入集液瓶内; [0069] 2) At the same time, outside air introduced into the collection canister;

[0070] 3)监测集液瓶内的实际负压值; [0070] 3) the actual value of the negative pressure collection canister of monitoring;

[0071] 4)将实际负压值与预定负压值比较,根据比较结果,通过同时控制抽气量以及进气量,使集液瓶内的实际负压值接近或达到预定负压值。 [0071] 4) comparing the actual value and the predetermined negative pressure value is negative, based on the comparison, and by simultaneously controlling the amount of intake air suction, so that the actual value of the negative pressure collection canister approaches or reaches a predetermined negative pressure value.

[0072] 以上仅是本发明的优选实施方式,应当指出的是,上述优选实施方式不应视为对本发明的限制,本发明的保护范围应当以权利要求所确定的范围为准。 [0072] The above are only preferred embodiments of the present invention, it should be noted that the above-described preferred embodiments should not be construed as limiting the present invention, the scope of the invention should be determined by the scope of the claims shall prevail. 对于本技术领域的技术人员来说,在不脱离本发明的精神和范围内,还可以做出若于改进和润饰,这些改进和润饰也应视为本发明的保护范围。 For the person skilled in the art, without departing from the spirit and scope of the present invention, it may be made if further improvements and modifications to these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims (12)

1. 一种负压治疗系统的负压控制装置,其特征在于,包括: 抽气机构,通过对集液瓶内抽气而为集液瓶提供负压; 电控阀,用于将外部气体导入集液瓶内; 压力监测模块,用于监测集液瓶内的实际负压值; 负压控制模块,将实际负压值与预定负压值比较,根据比较结果,同时控制抽气机构的抽气量以及电控阀的进气量,使集液瓶内的实际负压值接近或达到预定负压值; 所述负压控制模块控制负压治疗过程中的负压振幅缓慢变小,具体为:随着治疗初期伤口恶化、严重的情况到后来伤口逐渐愈合好转的情况变化,控制负压治疗过程中的负压值减小。 A negative pressure control apparatus of the vacuum therapy system, characterized by comprising: suction means, negative pressure provided by the fluid collection canister to the suction collection canister; electrically controlled valve, for outside air introducing collection canister; pressure monitoring means for monitoring the actual value of the negative pressure in the collection canister; negative pressure control module, comparing the actual value and the predetermined negative pressure value is negative, based on the comparison result, while controlling the pumping mechanism suction intake air amount and the electrically controlled valve, so that the actual collection canister reaches a predetermined negative pressure value or a negative value close; negative pressure control module controls the amplitude of the negative pressure in the negative pressure treatment is reduced slowly, particularly to: deterioration of the wound as the initial treatment, then serious situation to situation improved wound healing gradually changes the control value of the negative pressure during vacuum treatment is decreased.
2.如权利要求I所述的负压治疗系统的负压控制装置,其特征在于,所述负压控制模块包括: 运算处理单元,将实际负压值与预定负压值比较,根据比较结果,发出控制指令; 电控单元,根据所述控制指令控制抽气机构的抽气量以及电控阀的进气量。 2. The negative pressure control apparatus of the vacuum therapy system as claimed in claim I, wherein said negative pressure control module comprises: an operation processing unit compares the actual value and the predetermined negative pressure value is negative, the comparison result , a control command; electronic control unit, according to the intake air amount control command from the control amount and the suction pumping means electrically controlled valve.
3.如权利要求2所述的负压治疗系统的负压控制装置,其特征在于,所述电控单元通过控制所述抽气机构的电机的旋转频率来控制抽气机构的抽气量。 3. The negative pressure of the negative pressure therapy system control apparatus of claim 2, wherein said electronic control unit controls the amount of suction by the suction means controlling the rotation frequency of the motor of the pumping mechanism.
4.如权利要求2所述的负压治疗系统的负压控制装置,其特征在于,所述电控单元通过控制所述电控阀的排气孔的大小来控制进气量。 4. The vacuum system of the vacuum therapy to control apparatus according to claim 2, characterized in that said electronic control unit controls the intake air amount by controlling the size of the electrically controlled valve vent.
5.如权利要求2所述的负压治疗系统的负压控制装置,其特征在于,所述电控单元控制所述抽气机构的电压以及电控阀的电压,以控制抽气机构的抽气量、电控阀的进气量。 5. The negative pressure control apparatus according to the second negative pressure treatment system of claim, wherein said electronic control unit controls the voltage and the electrically controlled valve pumping mechanism to control the pump suction means air amount, the intake air amount of the electrically controlled valve.
6.如权利要求2所述的负压治疗系统的负压控制装置,其特征在于,所述电控单元控制所述抽气机构的电流以及电控阀的电流,以控制抽气机构的抽气量、电控阀的进气量。 6. The negative pressure control apparatus according to the second negative pressure treatment system of claim, wherein the control unit controls the electric current of the current pumping and electrically controlled valve means to control the pump suction means air amount, the intake air amount of the electrically controlled valve.
7.如权利要求5所述的负压治疗系统的负压控制装置,其特征在于,所述运算处理单元设有DA模块,用于向电控单元发送电压信号。 7. The vacuum system of vacuum therapy as claimed in claim 5, wherein the control means, wherein said arithmetic processing unit is provided with DA module, configured to send a voltage signal to the electronic control unit.
8.如权利要求5所述的负压治疗系统的负压控制装置,其特征在于,所述运算处理单元设有PWM模块,用于向电控单元发送电压信号。 8. The negative vacuum therapy system as claimed in claim 5, wherein the control means, wherein said arithmetic processing unit is provided with PWM module, configured to send a voltage signal to the electronic control unit.
9.如权利要求5所述的负压治疗系统的负压控制装置,其特征在于,所述运算处理单元设有电压控制电流模块,用于向电控单元发送电流信号。 9. The negative vacuum therapy system as claimed in claim 5, wherein the control means, wherein said arithmetic processing unit is provided with a voltage control current module, configured to send a current signal to the electronic control unit.
10.如权利要求I所述的负压治疗系统的负压控制装置,其特征在于,所述预定负压值随时间变化。 The negative pressure control apparatus 10. The vacuum therapy system according to claim I, wherein the predetermined negative pressure value varies with time.
11.如权利要求I所述的负压治疗系统的负压控制装置,其特征在于,所述预定负压值随时间呈曲线变化。 The negative pressure control apparatus 11. The vacuum therapy system according to claim I, wherein said predetermined value as a negative pressure curve over time.
12.如权利要求I所述的负压治疗系统的负压控制装置,其特征在于,在间歇治疗模式下,所述负压控制模块控制间歇治疗中每个治疗周期经历的时间逐渐变小。 12. The negative pressure of the negative pressure treatment system of claim I control apparatus, wherein, in the intermittent treatment mode, the negative pressure control module controls the time interval of each treatment cycle treatment experience progressively smaller.
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