WO2016086352A1 - 麻醉机及其麻醉机呼吸系统 - Google Patents

麻醉机及其麻醉机呼吸系统 Download PDF

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Publication number
WO2016086352A1
WO2016086352A1 PCT/CN2014/092777 CN2014092777W WO2016086352A1 WO 2016086352 A1 WO2016086352 A1 WO 2016086352A1 CN 2014092777 W CN2014092777 W CN 2014092777W WO 2016086352 A1 WO2016086352 A1 WO 2016086352A1
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WIPO (PCT)
Prior art keywords
gas
anesthesia machine
breathing system
air
driving gas
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PCT/CN2014/092777
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English (en)
French (fr)
Inventor
罗才瑾
蔡琨
陈培涛
Original Assignee
深圳迈瑞生物医疗电子股份有限公司
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Application filed by 深圳迈瑞生物医疗电子股份有限公司 filed Critical 深圳迈瑞生物医疗电子股份有限公司
Priority to PCT/CN2014/092777 priority Critical patent/WO2016086352A1/zh
Priority to CN201480017664.7A priority patent/CN105517615B/zh
Publication of WO2016086352A1 publication Critical patent/WO2016086352A1/zh

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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/01Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes specially adapted for anaesthetising
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/10Preparation of respiratory gases or vapours

Definitions

  • the present invention relates to the field of medical devices, and more particularly to an anesthesia machine and an anesthesia machine breathing system thereof.
  • the breathing system of an anesthesia machine is divided into a non-rebreathing system and a rebreathing system.
  • Anesthesia machines using the rebreathing system are the most widely used.
  • the gas exhaled by the patient is reused.
  • the bellows structure is generally used to isolate the driving gas from the patient's exhaled gas to reduce the loss of the anesthetic drug exhaled by the patient.
  • the fresh gas and the gas exhaled by the patient enter the folding capsule in the bellows.
  • the driving gas enters the bellows, and the gas in the folding capsule is driven into the patient's lung again.
  • An anesthesia breathing system comprising:
  • the driving gas isolating device comprising a device body, wherein the device body is provided with at least two air passages, the air passage is an elongated structure, and the at least two air passages are arranged in parallel;
  • a recirculating breathing system in communication with the other end of the air passage in the drive gas isolating device.
  • the air passage has a length of 1 to 4 meters.
  • the total volume of the at least two airways is between 1000 and 1500 ml.
  • the device body includes at least two trachea, the trachea is a helical structure, and a wall of the trachea encloses the airway.
  • the device body is a block structure
  • the at least two air passages are formed on the device body
  • the air passage is curved in a spiral shape.
  • the device body is made of a hard material.
  • the device body includes at least two trachea, the trachea is a spiral-like structure, and a wall of the trachea encloses the airway.
  • the device body is an elongated tubular structure, and the device body is spaced apart from the at least two air passages.
  • the circulatory breathing system includes a patient line and an inspiratory branch and an expiratory branch connected to the patient line, and the inspiratory branch is provided with an inhalation check valve.
  • An exhalation check valve is provided on the expiratory limb, and the inspiratory branch is also provided with a fresh gas branch.
  • the driving gas control system includes a driving gas line connected to the driving gas isolating device, and the driving gas line is provided with an inhaling valve for injecting the driving gas and a discharging driving gas isolating device Exhalation valve for excess gas inside.
  • An anesthesia machine including the above anesthesia breathing system
  • the driving gas isolating device in the above-mentioned anesthesia breathing system realizes the non-physical isolation between the driving gas and the mixed gas carrying a large amount of anesthetic drugs through the elongated and parallel air passages, and there is no elastic member like the folding bladder.
  • This allows the above-mentioned driving gas isolating device to control the pressure and flow rate more accurately, and does not have the positive end-expiratory pressure which is difficult to precisely control like the conventional bellows-driven gas isolating device.
  • the airway is a parallel structure with a length of 1 to 4 meters, which is beneficial to reduce the air resistance of the patient during breathing and improve the comfort of the patient.
  • the contact area between the mixed gas and the driving gas is very small, and the amount of the anesthetic drug diffused from the mixed gas to the driving gas is small, thereby realizing the mixed gas of the driving gas and the large anesthetic drug.
  • the non-physical isolation between the two ensures that the concentration of the anesthetic drug in the gas delivered to the circulatory respiratory system can reach the set value faster and remain at the set value.
  • the conventional driving gas isolating device is physically isolated. If the anesthesia machine leaks during the operation, the gas exhaled by the patient is not enough to fill the folding capsule, and in severe cases, the folding capsule collapses to the bottom, and the anesthesia machine cannot supply gas to the patient. May cause the patient to suffocate and die.
  • the above-mentioned driving gas isolating device is non-physical isolation, and even if the breathing system of the anesthesia machine leaks, it can be normally ventilated to ensure the life safety of the patient.
  • the above-mentioned driving gas isolating device is an integrated structure, which is easy to disassemble and assemble, and is easy to clean and disinfect.
  • FIG. 1 is a schematic structural view of an anesthesia breathing system according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural view of a driving gas isolation device in the breathing system of the anesthesia machine shown in FIG. 1;
  • FIG 3 is a schematic view showing the structure of the driving gas isolation device in the breathing system of the anesthesia machine shown in Figure 1;
  • Figure 4 is a schematic view showing the operation of the driving gas isolation device in the breathing system of the anesthesia machine shown in Figure 1;
  • Figure 5 is a schematic view showing the operation of another state of driving the gas isolating device in the breathing system of the anesthesia machine shown in Figure 1;
  • FIG. 6 is a schematic structural view of a driving gas isolation device according to another embodiment
  • Figure 7 is a cross-sectional view of the driving gas isolating device shown in Figure 6;
  • FIG. 8 is a schematic structural view of a driving gas isolating device according to another embodiment.
  • an anesthesia machine in accordance with a preferred embodiment of the present invention includes an anesthesia breathing system 10.
  • the anesthesia machine breathing system 10 includes a drive gas isolation device 100, a drive gas control system 200, and a recirculating breathing system 300. Both the drive gas control system 200 and the recirculating breathing system 300 are coupled to the drive gas isolation device 100.
  • the circulatory breathing system 300 includes a patient line 310 and an inspiratory branch 330 and an expiratory branch 350 connected to the patient line 310.
  • the inspiratory branch 330 is provided with an inhalation check valve. 332a
  • the expiratory bypass 350 is provided with an exhalation check valve 332b
  • the inspiratory limb 330 is further provided with a fresh gas branch 334.
  • the driving gas control system 200 includes a driving gas line 210 communicating with the driving gas isolating device 100.
  • the driving gas line 210 is provided with an intake valve 212 for inflating the driving gas and for exhausting the driving gas isolation device 100.
  • Exhalation valve 214 for gas. Both the inspiratory valve 212 and the exhalation valve 214 are connected to the driving gas isolating device 100 through the driving gas line 210.
  • the inspiratory valve 212 on the drive gas control system 200 is closed.
  • the exhaled gas with anesthetic drug exhaled by the patient enters the expiratory limb 350 through the patient circuit 310 and enters the driving gas isolation device 100 through the exhalation check valve 332b.
  • fresh gas also enters the anesthesia breathing system 10 via the fresh gas branch 334 on the inspiratory limb 330.
  • Fresh gas is injected into the circuit of the anesthesia breathing system 10 as a carrier gas carrying gas anesthetic.
  • the suction branch 330 is further provided with an absorption tank 336.
  • the fresh gas is filtered by the absorption tank 336 and then enters the driving gas isolation device 100 to be mixed with the gas exhaled by the patient.
  • the mixed gas of the exhaled gas and the fresh gas will drive the gas isolation device.
  • a portion of the driving gas in 100 is pushed to the exhalation valve 214 on the driving gas line 210 and discharged through the exhalation valve 214.
  • the inhalation valve 212 on the driving gas control system 200 is opened, and the driving gas passes through the inhalation valve 212 to drive the gas isolating device 100, and the mixed gas of the exhaled gas and the fresh gas is pushed through the absorption tank 336.
  • the carbon dioxide is filtered out of the soda lime in the absorption tank 336 as it passes through the absorption tank 336.
  • the mixed gas of carbon dioxide filtered flows through the inhalation check valve 332a and the patient line 310 and then enters the patient's lung again to complete a breathing cycle.
  • the driving gas may be oxygen or air. Both the pressure and flow control of the inspiratory phase of the patient can be controlled by the inspiratory valve 212.
  • the anesthesia machine breathing system 10 can further include a control system 400 including a control line 410 in communication with the driving gas isolation device 100 and the recirculating breathing system 300, the control line 410 having a manual machined switching valve 412, manual Skin 414 and APL valve 416 (Adjustable Pressure Limit Valve, adjustable pressure limiting valve).
  • Manually controlled switching valve 412 can switch the system to manual mode, at which point ventilation is controlled by manual bladder 414 and excess gas is expelled through APL valve 416.
  • the driving gas isolating device 100 isolates the mixed gas from the driving gas to prevent the mixed gas from being mixed with the driving gas, so that the anesthetic drug in the mixed gas can be reused.
  • the drive gas isolation device 100 includes a device body 110. At least two air passages 130 are disposed in the main body 110. The air passages 130 are elongated structures, and at least two air passages 130 are disposed in parallel.
  • the device body 110 includes at least two air pipes 112.
  • the air pipe 112 has a spiral structure, and the pipe wall of the air pipe 112 encloses the air passage 130.
  • the total volume of at least two airways 130 is 1000-1500 ml, and the total volume is greater than the tidal volume exhaled by the patient.
  • the air tubes 112 are two, and the tube walls of the two air tubes 112 respectively define two air passages 130.
  • the mixed gas of exhaled gas and fresh gas enters the driving gas isolating device 100 from one end of the air passage 130, and pushes the driving gas to the other end of the air passage 130, and the part of the driving gas is driven by The exhalation valve 214 on the drive gas line 210 is exhausted.
  • the patient Since the total volume of the airway 130 is greater than the tidal volume exhaled by the patient once, the patient enters the inhalation state when the mixed gas has not overflowed from the other end of the driving gas isolating device 100.
  • the driving gas enters the air passage 130 through the driving gas line 210 to push the mixed gas back from the driving gas isolating device 100, and the mixed gas is again sucked by the patient.
  • the contact area between the mixed gas and the driving gas is very small, and the amount of the anesthetic drug diffused from the mixed gas to the driving gas is small, thereby realizing the interaction between the driving gas and the mixed gas carrying a large amount of the anesthetic drug.
  • the non-physical isolation ensures that the concentration of the anesthetic drug in the gas delivered to the circulatory breathing system 300 can reach the set value faster and remain at the set value.
  • the anesthetic drugs in the exhaled gas are reused, reducing the waste of anesthetic drugs.
  • the length of the air passage 130 is 1 to 4 meters.
  • the length of the airway 130 is small, and the air resistance of the airway 130 circuit is small, which can improve the comfort of the patient's breathing.
  • the device body 110 has a block structure, and the air channel 130 is formed on the device body 110, and the air channel 130 is curved in a spiral shape.
  • the device body 110 is made of a hard material.
  • the material of the manufacturing apparatus main body 110 may be a metal material such as copper, aluminum or steel or a PPSU (Polyphenylene). Sulfone Plastic materials such as resins, polyphenylene sulfone resins.
  • the air passage 130 is two or more, the plurality of air passages 130 may be stacked on the apparatus main body 110. In the embodiment shown in FIG. 7, the two air passages 130 are in the height direction of the apparatus main body 110. distributed.
  • the device body 110 is an elongated tubular structure. At least two air passages 130 are spaced apart from the apparatus body 110. Specifically, in the embodiment shown in FIG. 8, seven air passages 130 are opened in the apparatus main body 110, and the seven air passages 130 are evenly distributed, so that the apparatus main body 110 forms a single honeycomb porous tubular structure.
  • the above anesthesia machine and its anesthesia breathing system 10 have at least the following advantages compared with the conventional anesthesia machine:
  • the driving gas isolating device 100 in the anesthesia machine respiratory system 10 realizes non-physical isolation between the driving gas and the mixed gas carrying a large amount of anesthetic drug through the elongated and parallel air passage 130, which is not like a folding capsule.
  • the elastic member enables the above-described driving gas isolating device 100 to control the pressure and flow rate more accurately, and does not have a positive end-expiratory pressure which is difficult to precisely control as in the conventional bellows type driving gas isolating device.
  • the airway 130 is a parallel structure and has a length of 1 to 4 meters, which is beneficial to reducing the air resistance of the patient during breathing and improving the comfort of the patient.
  • the contact area between the mixed gas and the driving gas is very small, and the amount of the anesthetic drug diffused from the mixed gas to the driving gas is small, thereby realizing the mixing of the driving gas and carrying a large amount of anesthetic drugs.
  • the non-physical separation between the gases ensures that the concentration of the anesthetic drug in the gas delivered to the circulatory respiratory system 300 can reach the set value faster and remain at the set value.
  • the conventional driving gas isolating device 100 is physically isolated. If the anesthesia machine leaks during the operation, the gas exhaled by the patient is not enough to fill the folding capsule, and in severe cases, the folding capsule collapses to the bottom, and the anesthesia machine cannot supply gas to the patient. May cause the patient to suffocate and die.
  • the driving gas isolating device 100 is non-physically isolated, and even if the anesthesia machine respiratory system 10 leaks, it can be normally ventilated to ensure the patient's life safety.
  • the above-mentioned driving gas isolating device 100 is an integrated structure, which is easy to disassemble and assemble, and is easy to clean and disinfect.

Abstract

一种麻醉机呼吸系统(10),包括驱动气体隔离装置(100)、驱动气体控制系统(200)以及循环呼吸系统(300)。驱动气体控制系统(200)及循环呼吸系统(300)均与驱动气体隔离装置(100)连通。驱动气体隔离装置(100)包括装置主体(110),装置主体(110)内设有并联设置的至少两个气道(130),该气道(130)为狭长形结构。该驱动气体隔离装置(100)通过细长且并联的气道(130),实现驱动气体与携带大量麻醉药物的混合气体间的非物理性隔离,其中没有使用如折叠囊这样的弹性元件,使得该驱动气体隔离装置(100)能够更加精准地控制压力和流量。此外还提供了一种使用该麻醉机呼吸系统(10)的麻醉机。

Description

麻醉机及其麻醉机呼吸系统
【技术领域】
本发明涉及医疗设备领域,特别是涉及一种麻醉机及其麻醉机呼吸系统。
【背景技术】
麻醉机的呼吸系统分为非再呼吸系统和再呼吸系统。采用再呼吸系统的麻醉机应用最为广泛。区别于非再呼吸系统,在再呼吸系统的麻醉机中,病人呼出的气体会被重复利用。具体的,通常采用风箱结构实现驱动气体与病人呼出气体的隔离,以减少病人所呼出的麻醉药物的损失。呼气时,新鲜气体及病人呼出的气体一并进入风箱内的折叠囊,而吸气时,驱动气体进入风箱中,驱动折叠囊内的气体再次进入病人的肺中。
传统的麻醉机,其驱动气体隔离装置大多采用风箱结构来实现驱动气体与病人呼出气体的隔离,病人肺内的气体压力和流量均通过控制驱动气体作用于折叠囊实现。但由于折叠囊材料柔软具有一定的弹性,在通气量较小时很难精确控制,并且安全阀存在一个微小的呼气末正压,尤其对新生儿的通气有着严重的影响,可能导致通气不足。
【发明内容】
基于此,有必要提供一种精确控制通气量的麻醉机呼吸系统及使用该麻醉机呼吸系统的麻醉机。
一种麻醉机呼吸系统,包括:
驱动气体隔离装置,所述驱动气体隔离装置包括装置主体,所述装置主体内设有至少两个气道,所述气道为狭长形结构,所述至少两个气道并联设置;
驱动气体控制系统,与所述驱动气体隔离装置中气道的一端相连通,所述驱动气体控制系统用于向所述驱动气体隔离装置提供驱动气体;及
循环呼吸系统,与所述驱动气体隔离装置中气道的另一端相连通。
在其中一个实施例中,所述气道的长度为1~4米。
在其中一个实施例中,所述至少两个气道的总容积为1000~1500ml。
在其中一个实施例中,所述装置主体包括至少两个气管,所述气管为螺旋状结构,所述气管的管壁围成所述气道。
在其中一个实施例中,所述装置主体为块状结构,所述至少两个气道开设于所述装置主体上,且所述气道弯曲呈盘旋状。
在其中一个实施例中,所述装置主体由硬质材料制成。
在其中一个实施例中,所述装置主体包括至少两个气管,所述气管为盘旋状结构,所述气管的管壁围成所述气道。
在其中一个实施例中,所述装置主体为狭长形管状结构,所述装置主体上间隔开设所述至少两个气道。
在其中一个实施例中,所述循环呼吸系统包括病人管路及与所述病人管路均连接的吸气支路和呼气支路,所述吸气支路上设有吸气单向阀,呼气支路上设有呼气单向阀,所述吸气支路还设有新鲜气体支路。
在其中一个实施例中,所述驱动气体控制系统包括与驱动气体隔离装置相连通的驱动气管路,驱动气管路上设有用于对驱动气体进行进气的吸气阀及用于排出驱动气体隔离装置内多余气体的呼气阀。
一种包括上述麻醉机呼吸系统的麻醉机
上述麻醉机及其麻醉机呼吸系统,与传统的麻醉机相比,至少具备以下优点:
首先,上述麻醉机呼吸系统中的驱动气体隔离装置通过细长且并联的气道,实现驱动气体与携带大量麻醉药物的混合气体间的非物理性隔离,其中并没有像折叠囊这样的弹性元件,使得上述驱动气体隔离装置能够更加精准地控制压力和流量,并不会像传统的风箱式的驱动气体隔离装置那样存在难以精确控制的呼气末正压。气道为并联结构,且长度为1~4米,有利于减小病人呼吸时的气阻,提高病人的舒适度。
同时,由于气道较为细长,混合气体与驱动气体间的接触面积十分小,从混合气体扩散至驱动气体中的麻醉药物的量较少,从而实现了驱动气体与携带大量麻醉药物的混合气体间的非物理性隔离,保证了输送给循环呼吸系统的气体中的麻醉药物的浓度能较快达到设定值,并保持在设定值。
此外,传统的驱动气体隔离装置为物理性隔离,如果麻醉机在手术中发生泄漏,病人呼出的气体不足以充满折叠囊,严重时折叠囊会塌陷至底部,导致麻醉机无法给病人供气,可能造成病人窒息死亡。上述驱动气体隔离装置为非物理性隔离,即使麻醉机呼吸系统发生泄漏,也可正常通气,保证病人生命安全。
最后,上述驱动气体隔离装置为一体化结构,拆装较为容易,且易于清洁消毒。
【附图说明】
图1为本发明一实施例中麻醉机呼吸系统的结构示意图;
图2为图1所示麻醉机呼吸系统中驱动气体隔离装置的结构示意图;
图3为图1所示麻醉机呼吸系统中驱动气体隔离装置另一角度的结构示意图;
图4为图1所示麻醉机呼吸系统中驱动气体隔离装置的工作示意图;
图5为图1所示麻醉机呼吸系统中驱动气体隔离装置另一状态的工作示意图;
图6为另一实施例的驱动气体隔离装置的结构示意图;
图7为图6所示驱动气体隔离装置的截面图;
图8为另一实施例的驱动气体隔离装置的结构示意图。
【具体实施方式】
为了便于理解本发明,下面将参照相关附图对本发明进行更全面的描述。附图中给出了本发明的较佳实施方式。但是,本发明可以以许多不同的形式来实现,并不限于本文所描述的实施方式。相反地,提供这些实施方式的目的是使对本发明的公开内容理解的更加透彻全面。
需要说明的是,当元件被称为“固定于”另一个元件,它可以直接在另一个元件上或者也可以存在居中的元件。当一个元件被认为是“连接”另一个元件,它可以是直接连接到另一个元件或者可能同时存在居中元件。本文所使用的术语“垂直的”、“水平的”、“左”、“右”以及类似的表述只是为了说明的目的,并不表示是唯一的实施方式。
除非另有定义,本文所使用的所有的技术和科学术语与属于本发明的技术领域的技术人员通常理解的含义相同。本文中在本发明的说明书中所使用的术语只是为了描述具体的实施方式的目的,不是旨在于限制本发明。本文所使用的术语“及/或”包括一个或多个相关的所列项目的任意的和所有的组合。
请参阅图1,本发明较佳实施例中的麻醉机(图未标),包括麻醉机呼吸系统10。麻醉机呼吸系统10包括驱动气体隔离装置100、驱动气体控制系统200及循环呼吸系统300。驱动气体控制系统200及循环呼吸系统300均与驱动气体隔离装置100相连。
具体在本实施例中,循环呼吸系统300包括病人管路310及与病人管路310均连接的吸气支路330和呼气支路350,吸气支路330上设有吸气单向阀332a,呼气支路350上设有呼气单向阀332b,吸气支路330还设有新鲜气体支路334。驱动气体控制系统200包括与驱动气体隔离装置100相连通的驱动气管路210,驱动气管路210上设有用于对驱动气体进行进气的吸气阀212及用于排出驱动气体隔离装置100内多余气体的呼气阀214。吸气阀212及呼气阀214均通过驱动气管路210与驱动气体隔离装置100相连接。
病人呼气时,驱动气体控制系统200上的吸气阀212关闭。病人呼出的带有麻醉药物的呼出气体经过病人管路310进入呼气支路350中,并经过呼气单向阀332b进入驱动气体隔离装置100。同时新鲜气体也经过吸气支路330上的新鲜气体支路334进入麻醉机呼吸系统10中。新鲜气体作为载气携带气体麻醉药物注入麻醉机呼吸系统10的回路。吸气支路330上还设有吸收罐336,新鲜气体经过吸收罐336的过滤后进入驱动气体隔离装置100中,与病人呼出的气体混合,呼出气体和新鲜气体的混合气体将驱动气体隔离装置100中部分的驱动气体推至驱动气管路210上呼气阀214处,并通过呼气阀214排出。
病人吸气时,驱动气体控制系统200上的吸气阀212打开,驱动气体经过吸气阀212进入驱动气体隔离装置100,推动呼出气体和新鲜气体的混合气体经吸收罐336。混合气体通过吸收罐336时二氧化碳会被吸收罐336中的钠石灰滤除。滤除二氧化碳的混合气体一起流经吸气单向阀332a及病人管路310后再次进入病人的肺中,完成一次呼吸循环。具体的,驱动气体可以为氧气或空气。病人吸气阶段的压力和流量控制均可由吸气阀212控制。
麻醉机呼吸系统10还可包括控制系统400,控制系统400包括与驱动气体隔离装置100及循环呼吸系统300相连通的控制管路410,控制管路410上设有手动机控切换阀412、手动皮囊414及APL阀416(Adjustable Pressure Limit Valve,可调压力限制阀)。手动机控切换阀412可将系统切换至手动模式,此时通过手动皮囊414控制通气,多余的气体通过APL阀416排出。
驱动气体隔离装置100可对混合气体与驱动气体进行隔离,阻止混合气体与驱动气体相混合,以使混合气体内的麻醉药物得以重复利用。
驱动气体隔离装置100包括装置主体110。装置主体110内设有至少两个气道130,气道130为狭长形结构,至少两个气道130并联设置。
请一并参阅图2及图3,装置主体110包括至少两个气管112,气管112为螺旋状结构,气管112的管壁围成气道130。至少两个气道130的总容积为1000~1500ml,其总容积大于病人一次呼出的潮气量。
具体在本实施例中,气管112为两个,两个气管112的管壁分别围成两个气道130。请一并参阅图4,病人呼气时,呼出气体和新鲜气体的混合气体从气道130的一端进入驱动气体隔离装置100,并将驱动气体推向气道130的另一端,部分驱动气体由驱动气管路210上的呼气阀214排出。
由于气道130的总容积大于病人一次呼出的潮气量,在混合气体还未从驱动气体隔离装置100的另一端溢出时,病人即进入吸气状态。请一并参阅图5,驱动气体经过驱动气管路210进入气道130内,以将混合气体从驱动气体隔离装置100中推回,并使混合气体再次被病人吸入。
由于气道130较为细长,混合气体与驱动气体间的接触面积十分小,从混合气体扩散至驱动气体中的麻醉药物的量较少,从而实现了驱动气体与携带大量麻醉药物的混合气体间的非物理性隔离,保证了输送给循环呼吸系统300的气体中的麻醉药物的浓度能较快达到设定值,并保持在设定值。呼出气体中的麻醉药物得到重复利用,减少了麻醉药物的浪费。
气道130的长度为1~4米。气道130的长度较小,气道130回路的气阻较小,可以提高病人呼吸的舒适度。
请一并参阅图6,可以理解,在其它实施例中,装置主体110为块状结构,气道130开设于装置主体110上,气道130弯曲呈盘旋状。装置主体110由硬质材料制成。具体的,制作装置主体110的材料可为铜、铝、钢等金属材料或者为PPSU(Polyphenylene sulfone resins,聚亚苯基砜树脂)等塑料材料。请一并参阅图7,气道130为两个或以上时,多个气道130可在装置主体110层叠,如图7所示实施例中,两个气道130在装置主体110高度方向上分布。
请一并参阅图8,在另一实施例中,装置主体110为狭长形管状结构。装置主体110上间隔开设至少两个气道130。具体的,在图8所示的实施例中,装置主体110上开设有七个气道130,七个气道130均匀分布,以使装置主体110形成单根蜂窝状多孔管状结构。
上述麻醉机及其麻醉机呼吸系统10,与传统的麻醉机相比,至少具备以下优点:
首先,上述麻醉机呼吸系统10中的驱动气体隔离装置100通过细长且并联的气道130,实现驱动气体与携带大量麻醉药物的混合气体间的非物理性隔离,其中并没有像折叠囊这样的弹性元件,使得上述驱动气体隔离装置100能够更加精准地控制压力和流量,并不会像传统风箱式的驱动气体隔离装置那样存在难以精确控制的呼气末正压。气道130为并联结构,且长度为1~4米,有利于减小病人呼吸时的气阻,提高病人的舒适度。
同时,由于气道130较为细长,混合气体与驱动气体间的接触面积十分小,从混合气体扩散至驱动气体中的麻醉药物的量较少,从而实现了驱动气体与携带大量麻醉药物的混合气体间的非物理性隔离,保证了输送给循环呼吸系统300的气体中的麻醉药物的浓度能较快达到设定值,并保持在设定值。
此外,传统的驱动气体隔离装置100为物理性隔离,如果麻醉机在手术中发生泄漏,病人呼出的气体不足以充满折叠囊,严重时折叠囊会塌陷至底部,导致麻醉机无法给病人供气,可能造成病人窒息死亡。上述驱动气体隔离装置100为非物理性隔离,即使麻醉机呼吸系统10发生泄漏,也可正常通气,保证病人生命安全。
最后,上述驱动气体隔离装置100为一体化结构,拆装较为容易,且易于清洁消毒。
以上所述实施例仅表达了本发明的几种实施方式,其描述较为具体和详细,但并不能因此而理解为对本发明专利范围的限制。应当指出的是,对于本领域的普通技术人员来说,在不脱离本发明构思的前提下,还可以做出若干变形和改进,这些都属于本发明的保护范围。因此,本发明专利的保护范围应以所附权利要求为准。

Claims (11)

  1. 一种麻醉机呼吸系统,其特征在于,包括:
    驱动气体隔离装置,所述驱动气体隔离装置包括装置主体,所述装置主体内设有至少两个气道,所述气道为狭长形结构,所述至少两个气道并联设置;
    驱动气体控制系统,与所述驱动气体隔离装置中气道的一端相连通,所述驱动气体控制系统用于向所述驱动气体隔离装置提供驱动气体;及
    循环呼吸系统,与所述驱动气体隔离装置中气道的另一端相连通。
  2. 根据权利要求1所述的麻醉机呼吸系统,其特征在于, 所述气道的长度为1~4米。
  3. 根据权利要求1所述的麻醉机呼吸系统,其特征在于,所述至少两个气道的总容积为1000~1500ml。
  4. 根据权利要求1所述的麻醉机呼吸系统,其特征在于,所述装置主体包括至少两个气管,所述气管为螺旋状结构,所述气管的管壁围成所述气道。
  5. 根据权利要求1所述的麻醉机呼吸系统,其特征在于,所述装置主体为块状结构,所述至少两个气道开设于所述装置主体上,且所述气道弯曲呈盘旋状。
  6. 根据权利要求5所述的麻醉机呼吸系统,其特征在于,所述装置主体由硬质材料制成。
  7. 根据权利要求1所述的麻醉机呼吸系统,其特征在于,所述装置主体包括至少两个气管,所述气管为盘旋状结构,所述气管的管壁围成所述气道。
  8. 根据权利要求1所述的麻醉机呼吸系统,其特征在于,所述装置主体为狭长形管状结构,所述装置主体上间隔开设所述至少两个气道。
  9. 根据权利要求1所述的麻醉机呼吸系统,其特征在于,所述循环呼吸系统包括病人管路及与所述病人管路均连接的吸气支路和呼气支路,所述吸气支路上设有吸气单向阀,呼气支路上设有呼气单向阀,所述吸气支路还设有新鲜气体支路。
  10. 根据权利要求1所述的麻醉机呼吸系统,其特征在于,所述驱动气体控制系统包括与驱动气体隔离装置相连通的驱动气管路,驱动气管路上设有用于对驱动气体进行进气的吸气阀及用于排出驱动气体隔离装置内多余气体的呼气阀。
  11. 一种包括权利要求1-10任一项所述麻醉机呼吸系统的麻醉机。
PCT/CN2014/092777 2014-12-02 2014-12-02 麻醉机及其麻醉机呼吸系统 WO2016086352A1 (zh)

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