WO2013086958A1 - 气路适配器 - Google Patents

气路适配器 Download PDF

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Publication number
WO2013086958A1
WO2013086958A1 PCT/CN2012/086271 CN2012086271W WO2013086958A1 WO 2013086958 A1 WO2013086958 A1 WO 2013086958A1 CN 2012086271 W CN2012086271 W CN 2012086271W WO 2013086958 A1 WO2013086958 A1 WO 2013086958A1
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WO
WIPO (PCT)
Prior art keywords
interface
sampling
pipe
gas
peripheral surface
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2012/086271
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English (en)
French (fr)
Inventor
赵华琳
陈绩
周卫东
刘云峰
岑建
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Mindray Bio Medical Electronics Co Ltd
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Shenzhen Mindray Bio Medical Electronics Co Ltd
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Publication date
Application filed by Shenzhen Mindray Bio Medical Electronics Co Ltd filed Critical Shenzhen Mindray Bio Medical Electronics Co Ltd
Publication of WO2013086958A1 publication Critical patent/WO2013086958A1/zh
Priority to US14/304,738 priority Critical patent/US20140338669A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES 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
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
    • A61M16/08—Bellows; Connecting tubes ; Water traps; Patient circuits
    • A61M16/0816—Joints or connectors
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES 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
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
    • A61M16/08—Bellows; Connecting tubes ; Water traps; Patient circuits
    • A61M16/0816—Joints or connectors
    • A61M16/0841—Joints or connectors for sampling
    • A61M16/085—Gas sampling
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES 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
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
    • A61M16/08—Bellows; Connecting tubes ; Water traps; Patient circuits
    • A61M16/0808—Condensation traps

Definitions

  • the present invention relates to a pneumatic adapter for a pneumatic connection.
  • the low dead space type airway adapter is mainly used as a low tidal volume intubation patient, especially an interface conversion device for intubating patients such as newborns and pediatrics and an auxiliary breathing apparatus for airway connection, that is, connecting the pneumatic ports of different calibers together,
  • a closed breathing circuit is formed between the patient cannula and the auxiliary breathing apparatus, so that the patient exchanges gas with the auxiliary breathing apparatus such as a ventilator or an anesthesia machine through the sealed airway.
  • the use of a low dead space type airway adapter connection line allows the patient to be ventilated with different auxiliary breathing apparatus without replacing the cannula, avoiding the pain of repeated intubation operations.
  • the low dead space type air circuit adapter has a gas sampling interface, which can introduce a small amount of gas in the patient's respiratory gas path into the monitoring device such as the monitor through the sampling interface, so that the doctor can monitor the gas components in the patient's breathing gas. Understand the patient's condition and conduct timely and effective clinical treatment.
  • the entire air path is additionally increased in volume, which is called a dead space.
  • a dead space In order to improve the gas sampling effect, it is necessary to reduce the dead volume.
  • the sampling line In addition, in order to prevent the sampling line from being clogged with liquid, it is also necessary to prevent condensation droplets in the gas path adapter from entering the sampling port.
  • the object of the present invention is to provide a gas path adapter capable of improving the gas sampling effect in view of the deficiencies of the prior art.
  • a pneumatic circuit adapter comprising an outer pipe, a gas collector and an inner pipe, the outer pipe having a first interface and a second interface capable of connecting the gas path,
  • the outer peripheral surface of the outer pipe is provided with a sampling interface
  • the inner pipe is fixed inside the outer pipe
  • the inner pipe is at least partially located inside the first interface
  • the gas collector is fixed at the inner pipe Internally, and the gas collector is in communication with the sampling interface through a sampling gas path that extends through the inner and outer tubes.
  • an inner connecting surface of the outer pipe protrudes from an annular connecting rib, and the connecting rib covers the inner pipe and is fixed to the inner pipe, and the sampling gas path sequentially penetrates the inner pipe and connects Rims and outer pipes.
  • a first annular cavity surrounding the inner conduit is formed between the inner conduit and the first interface, and the connecting rib disconnects the first annular cavity from the second interface. Due to the provision of the connecting ribs, the gas entering the gas path adapter, except for a small part of the gas, can flow out through the inner pipe and the sampling gas path, and other gases flow out through the inner pipe.
  • the inner duct extends into the interior of the second interface, and a second annular cavity surrounding the inner duct is formed between the inner duct and the second interface, and the connecting ribs will be the first annular cavity Separated from the second annular cavity.
  • front and rear end faces of the outer pipe are flush with the front and rear end faces of the inner pipe, respectively.
  • the end of the outer peripheral surface of the gas collector has an annular protrusion.
  • annular protrusion is provided with a plurality of sharp points. Sharp points can be evenly distributed.
  • the outer pipe, the inner pipe, the gas path collector, the sampling interface and the connecting rib are integrally injection molded, that is, the gas path adapter is formed by one injection molding.
  • first interface is an interface for mating with a patient cannula
  • second interface is an interface for mating with an auxiliary breathing device.
  • first and second interfaces can also be used to connect other gas paths that need to reduce dead space.
  • the inner peripheral surface of the first interface and the outer peripheral surface of the second interface are both mating surfaces for interface connection, and the inner peripheral surface of the first interface and the outer peripheral surface of the second interface each have a taper. That is, the inner peripheral surface of the first interface may be connected to the patient cannula, and the outer peripheral surface of the second interface may be connected to the auxiliary breathing apparatus.
  • the air circuit adapter further includes an end cover, the end cover is detachably connected to the sampling interface, the end cover has an open state and a sealed state, and in the open state, the end cover is separated The sampling interface; in the sealed state, the end cap seals the sampling interface.
  • the end cap has a sealing plug, and in the open state, the sealing plug is separated from the sampling interface; in the sealed state, the sealing plug is inserted into and seals the sampling interface.
  • the air circuit adapter further includes an elastically deformable connecting handle, the connecting handle connecting an outer peripheral surface of the outer pipe and an end cover, and in the sealed state, the connecting handle is torsionally deformed; In the open state, the deformation of the connecting handle is restored.
  • the end caps can also be set independently, that is, when the gas sampling is not required, the end caps are tightly mounted on the sampling interface; when gas sampling is required, the end caps are removed.
  • a gas collector having an inner peripheral surface and an outer peripheral surface, the inner peripheral surface enclosing a collecting gas passage through which a gas passes, and the outer peripheral surface has an annular projection at a bottom end thereof.
  • the collection gas path is in communication with the sampling gas path.
  • annular protrusion is provided with a plurality of sharp points.
  • the beneficial effects of the invention are as follows: 1) by adding a fixed inner pipe inside the outer pipe, the gas passage section of the entire gas path adapter is reduced, and the retention of the patient exhaled gas in the gas path adapter is reduced, thereby reducing the dead space.
  • the volume effectively reduces the influence of the retained gas on the gas detection result and improves the gas sampling effect.
  • the end cap By providing the end cap, the end cap can seal the sampling interface, maintain the airway tightness, and avoid the clinical operation such as replacing the additional interface conversion element when clinical operation such as suction is not required. 3) By providing annular protrusions and sharp points, it is possible to prevent the droplets from being sucked into the sampling gas path.
  • FIG. 1 is a schematic perspective view showing a first embodiment of a pneumatic circuit adapter according to the present invention
  • Figure 2 is a front elevational view of the first embodiment
  • Figure 3 is a cross-sectional view taken along line A-A of Figure 2;
  • Figure 4 is a cross-sectional view taken along line B-B of Figure 2;
  • Figure 5 is a perspective view showing the second embodiment of the pneumatic circuit adapter of the present invention.
  • Figure 6 is a front elevational view of the second embodiment
  • Figure 7 is a cross-sectional view taken along line A-A of Figure 6;
  • Figure 8 is a cross-sectional view of Figure 6 taken along line B-B.
  • the gas path adapter includes an outer pipe 1, an inner pipe 2, and a gas collector 3.
  • the outer duct 1 is a structure that penetrates forward and backward in the axial direction (X-axis direction in FIG. 4), and has an inner peripheral surface 11 and an outer peripheral surface 12 that surrounds the first inner cavity 13.
  • the front portion of the outer tube 1, i.e., the rear portion from the outer tube front end face 14, is the first interface 4 for mating engagement with the patient cannula.
  • the rear portion of the outer tube i.e., the forward portion from the rear end surface 15 of the outer tube, is a second interface 5 for mating engagement with an auxiliary breathing apparatus such as a ventilator or an anesthesia machine.
  • the inner peripheral surface 11 of the outer duct includes a first inner peripheral surface 41 of the first interface 4 and a second inner peripheral surface 51 of the second interface 5, and the outer peripheral surface 12 of the outer duct includes a first outer peripheral surface 42 of the first interface 4 and The second outer peripheral surface 52 of the second interface 5.
  • the inner duct 2 is also a structure that penetrates in the axial direction, and the inner duct 2 is located in the first inner chamber 13, and the inner peripheral surface 21 of the inner duct 2 encloses the second inner chamber 23.
  • the inner peripheral surface 11 of the outer pipe is provided with a connecting rib 6 which surrounds the inner pipe 2 and is fixed to the outer peripheral surface 22 of the inner pipe 2.
  • the inner duct 2 is at least partially located inside the first interface 4, and a first annular chamber 16 surrounding the inner duct 2 is formed between the inner duct 2 and the first interface 4.
  • the inner duct 2 can also extend to the interior of the second interface 5 such that a second annular chamber 17 surrounding the inner duct 2 is formed between the inner duct 2 and the second interface 5.
  • the connecting rib 6 disconnects the first annular chamber 16 and the second annular chamber 17.
  • a plurality of reinforcing ribs 24 are further disposed in the second annular cavity 17, and each reinforcing rib 24 connects the inner circumferential surface 11 of the outer pipe, the outer circumferential surface 22 of the inner pipe, and the connecting rib 6.
  • the inner duct 2 may also be located entirely inside the first interface 4 without extending to the inside of the second interface 5, at this time, the connecting rib 6 will be the first annular cavity 16 and the second interface 5 The first annular cavity 16 and the second interface 5 are separated from each other.
  • the outer peripheral surface 12 of the outer tube 1 is provided with a sampling interface 7 for cooperating with a sampling tube, which is connected to the monitoring device.
  • the gas collector 3 is located in the second inner chamber 23 of the inner pipe and is fixedly connected to the middle portion of the inner circumferential surface of the inner pipe 2, and the longitudinal through connecting rib 6 and the outer pipe 1 form a sampling gas path 8 through which the gas collector 3 passes.
  • the path 8 is in communication with the sampling interface 7.
  • the gas collector 3 has an inner peripheral surface 35 and an outer peripheral surface 31 that encloses a collecting gas path 34 through which gas passes, and the collecting gas path 34 communicates with the sampling gas path 8.
  • the first inner circumferential surface 41 of the first interface 4 is connected to the joint of the patient cannula
  • the second outer circumferential surface 52 of the second interface 5 is connected to the pneumatic interface of the auxiliary respiratory device
  • the sampling interface 7 is connected.
  • the patient forms a pneumatic connection with the auxiliary breathing apparatus through the cannula, the first interface, and the second interface, and simultaneously introduces a small amount of gas through the sampling interface 7 to the monitoring device for analysis to monitor the patient status.
  • the gas flows out of the patient cannula, flows through the second lumen 23 of the inner tube 2 through the gas path adapter and is sampled through the sampling gas path 8.
  • the second inner cavity 23 of the inner pipe has a smaller dead volume relative to the first inner cavity 13 of the outer pipe, the mixing of the exhaled gas of the patient with the original gas in the air circuit adapter is reduced, and the interference of the mixed gas on the sampling is avoided. Therefore, the monitoring of respiratory gas in patients with low tidal volume intubation such as infants and children is more accurate.
  • the bottom end of the outer peripheral surface 31 of the gas collector 3 may be provided with an annular projection 32 provided with a plurality of sharp points 33, such as four sharp points 33 uniformly distributed.
  • an annular projection 32 provided with a plurality of sharp points 33, such as four sharp points 33 uniformly distributed.
  • the first inner circumferential surface 41 of the first interface 4 may have a taper.
  • the second outer peripheral surface 52 of the second interface 5 may also have a taper.
  • the sampling interface 7 can be a standard interface size, such as a standard Luer mother interface, and of course, other interface forms that can be matched with the sampling tube.
  • the air circuit adapter can be integrally formed by injection molding, that is, the outer pipe, the inner pipe, the sampling interface, the gas collector and the connecting rib are integrally injection-molded, so that assembly is not required, and the production is convenient.
  • the pneumatic adapter can be medical grade polypropylene material, although other medical grade materials can be used.
  • the inner pipe extends into the interior of the first and second interfaces at the same time; further, the front and rear end faces of the inner pipe may be flush with the front and rear end faces of the outer pipe.
  • the air circuit adapter includes an outer pipe 1 having an first interface 4 and a second interface 5, an inner pipe 2, a connecting rib 6, a gas collector 3, and a sampling interface 7, the outer pipe 1, the inner pipe 2, the connecting rib 6,
  • the shape, configuration, positional relationship, and the like of the sampling interface 7 and the gas collector 3 may be as described in the first embodiment.
  • the pneumatic adapter further comprises an end cap 9 which is detachably connected to the sampling interface 7.
  • the end cap 9 has an open state and a sealed state, in which the end cap 9 is separated from the sampling interface 7; in the sealed state, the end cap 9 seals the sampling interface 7.
  • the end cap 9 can also have a closure plug 91 which, in the sealed state, engages and seals the sampling interface 7.
  • the end cap 9 can be connected to the outer peripheral surface 12 of the outer tube 1 by the connecting handle 10.
  • the connecting handle 10 is an elastic body that can be twisted and deformed when subjected to an external force and deformed and restored when the external force is removed. In the sealed state, the connecting handle 10 is twisted and deformed; in the open state, the deformation of the connecting handle 10 is restored.
  • the connecting handle 10 and the sampling interface 7 are staggered by an angle.
  • the axis of the end cover 9 and the axis of the sampling interface 7 are different from each other; when the sampling interface 7 needs to be sealed, The connecting handle 10 is twisted so that the sealing plug 91 of the end cap 9 can be aligned and plugged into the sampling interface 7.
  • the connecting handle 10 can be twisted, and the sealing plug 91 is matched and sealed with the sampling interface 7.
  • the air circuit adapter serves as an interface switching element, and the clinical operation such as replacement of the additional interface switching element is avoided.
  • the sealing plug 91 is removed and the deformation of the connecting handle 10 is restored.
  • the pneumatic adapter can use a medical grade polypropylene material with good strength and toughness, and can be formed by one-time injection molding, without assembly and production.
  • the gas path adapter has an outer tube, the front portion of which is a first interface, and the rear portion of the outer tube is a second interface.
  • the outer pipe can be integrally injection molded or assembled from multiple parts.
  • the inner pipe is fixed with an inner pipe, and the inner pipe can extend only into the first interface, or can extend into the first interface and the second interface at the same time.
  • the front and rear end faces of the inner pipe may or may not be aligned with the front and rear end faces of the outer pipe.
  • the gas path adapter can be formed by one injection molding or assembled from a plurality of components, such as an outer pipe, a sampling port, a gas collector, a connecting rib, and an inner pipe.

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  • Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Emergency Medicine (AREA)
  • Hematology (AREA)
  • Pulmonology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

一种气路适配器包括外管道（1）、气体收集器（3）及内管道（2）。所述外管道（1）具有第一接口（4）和第二接口（5）。所述外管道（1）的外周面（12）设有采样接口。所述内管道（2）固定在所述外管道（1）的内部。所述内管道（2）至少部分位于所述第一接口（4）的内部。所述气体收集器（3）固定在所述内管道（2）的内部。所述气体收集器（3）通过采样气路（8）与所述采样接口（7）连通。所述采样气路（8）径向贯穿所述内管道（2）和外管道（1）。在外管道（1）内增加固定的内管道（2），减小了病人呼出气体在气路适配器中的留存，从而减小了死腔体积。气体收集器（3）可以防止气路中的冷凝液体吸入采样气路（8），进而防止采样气路（8）堵塞。

Description

气路适配器
【技术领域】
本发明是关于一种用于气路连接的气路适配器。
【背景技术】
低死腔型气路适配器主要用作低潮气量插管病人，特别是新生儿、小儿等插管病人与辅助呼吸设备进行气路联接的接口转换器件，即将不同口径的气路接口连接在一起，在病人插管与辅助呼吸设备间形成密闭的呼吸气路，使病人通过该密封气路与呼吸机、麻醉机等辅助呼吸设备进行气体交换。采用低死腔型气路适配器连接管路可在不更换插管的情况下使病人与不同辅助呼吸设备进行通气，避免重复插管操作给病人带来的痛苦。另外，低死腔型气路适配器带有气体采样接口，可将病人呼吸气路中的少量气体通过采样接口引入到监护仪等监护设备中，使医生可以通过监测病人呼吸气体中的各气体成分了解病人状态，进行及时、有效的临床处理。
由于气路适配器的接入，使整个气路额外增加了体积，该额外体积称为死腔。为了提高气体采样效果，需要减小死腔体积。另外，为避免采样管路被液体堵塞，还需防止气路适配器中的冷凝液滴进入采样口。
【发明内容】
本发明的目的是针对现有技术的不足，提供一种能够提高气体采样效果的气路适配器。
为实现上述目的，本发明采用了以下技术方案：一种气路适配器，包括外管道、气体收集器及内管道，所述外管道具有能够连接气路的第一接口和第二接口，所述外管道的外周面设有采样接口，所述内管道固定在所述外管道的内部，所述内管道至少部分位于所述第一接口的内部，所述气体收集器固定在所述内管道的内部，且所述气体收集器通过采样气路与所述采样接口连通，所述采样气路径向贯穿所述内管道和外管道。
进一步的，所述外管道的内周面凸设有环形连接筋，所述连接筋套住所述内管道并与所述内管道固定，所述采样气路径向顺次贯穿所述内管道、连接筋及外管道。
进一步的，所述内管道和第一接口之间形成环绕所述内管道的第一环形腔，所述连接筋使所述第一环形腔和第二接口断开连通。由于设置连接筋，进入气路适配器的气体，除了少部分气体能够通过内管道、采样气路流出外，其他气体均通过内管道流出。
进一步的，所述内管道伸入所述第二接口的内部，所述内管道与第二接口之间形成环绕所述内管道的第二环形腔，所述连接筋将所述第一环形腔和第二环形腔隔开。
进一步的，所述外管道的前、后端面分别与所述内管道的前、后端面平齐。
进一步的，所述气体收集器外周面的端部具有环状突起。
进一步的，所述环状突起设有多个尖点。尖点可以均匀分布。
进一步的，所述外管道、内管道、气路收集器、采样接口及连接筋一体注塑成型，即气路适配器是通过注塑一次加工成型。
进一步的，所述第一接口是用于与病人插管配合的接口，所述第二接口是用于与辅助呼吸设备配合的接口。当然，第一、第二接口也可以用来连接其他需要减少死腔的气路。
进一步的，所述第一接口的内周面和第二接口的外周面均是进行接口连接的配合面，且所述第一接口的内周面和第二接口的外周面均具有锥度。即第一接口的内周面可以与病人插管连接，第二接口的外周面可以与辅助呼吸设备连接。
进一步的，所述的气路适配器，还包括端盖，所述端盖与所述采样接口可拆卸连接，所述端盖具有打开状态和密封状态，在所述打开状态，所述端盖离开所述采样接口；在所述密封状态，所述端盖密封所述采样接口。
进一步的，所述端盖具有封口塞，在所述打开状态，所述封口塞离开所述采样接口；在所述密封状态，所述封口塞塞入并密封所述采样接口。
进一步的，所述的气路适配器，还包括能够弹性变形的连接柄，所述连接柄连接所述外管道的外周面和端盖，在所述密封状态，所述连接柄扭转变形；在所述打开状态，所述连接柄的变形回复。当然，端盖也可以独立设置，即不需要气体采样时，将端盖密安装在采样接口；需要气体采样时，将端盖移走。
一种气体收集器，具有内周面及外周面，所述内周面围出供气体通过的收集气路，所述外周面的底端具有环状突起。该收集气路与采样气路连通。
进一步的，所述环状突起设有多个尖点。
本发明的有益效果是：1)通过在外管道内部增加固定的内管道，降低了整个气路适配器的气路截面，减小了病人呼出气体在气路适配器中的留存，从而减小了死腔体积，有效减小了留存气体对气体检测结果的影响，提高了气体采样效果。2)通过设置端盖，在不需要进行气体成分检测时，例如吸痰等临床操作时，该端盖可以将采样接口密封，保持气路密封性，避免更换额外接口转换元件等临床操作。3)通过设置环状突起、尖点，可以避免液滴吸入采样气路。
【附图说明】
图1是本发明气路适配器第一具体实施方式的立体结构示意图；
图2是第一具体实施方式的主视图；
图3是图2沿A-A方向的剖视图；
图4是图2沿B-B方向的剖视图；
图5是本发明气路适配器第二具体实施方式的立体结构示意图；
图6是第二具体实施方式的主视图；
图7是图6沿A-A方向的剖视图；
图8是图6沿B-B方向的剖视图。
【具体实施方式】
下面通过具体实施方式结合附图对本发明作进一步详细说明。
如图1至图4所示，其为本发明气路适配器的第一具体实施方式。该气路适配器包括外管道1、内管道2及气体收集器3。外管道1是沿轴向(图4中X轴方向)前后贯穿的结构体，其具有内周面11和外周面12，该内周面11围出第一内腔13。外管道1的前部，即自外管道前端面14向后的一段，是用于与病人插管插接配合的第一接口4。外管道1的后部，即自外管道后端面15向前的一段，是用于与辅助呼吸设备插接配合的第二接口5，该辅助呼吸设备如呼吸机或麻醉机等。外管道的内周面11包括第一接口4的第一内周面41和第二接口5的第二内周面51，外管道的外周面12包括第一接口4的第一外周面42和第二接口5的第二外周面52。
内管道2也是在该轴向前后贯穿的结构体，该内管道2位于第一内腔13内，该内管道2的内周面21围出第二内腔23。外管道的内周面11设有连接筋6，该连接筋6环绕该内管道2并与该内管道2的外周面22固定。
内管道2至少部分位于第一接口4的内部，该内管道2和第一接口4之间形成环绕内管道2的第一环形腔16。内管道2还可以延伸至第二接口5的内部，使内管道2和第二接口5之间形成环绕内管道2的第二环形腔17。连接筋6使该第一环形腔16和第二环形腔17断开连通。第二环形腔17内还分布有多个加强筋24，各加强筋24连接外管道的内周面11、内管道的外周面22及连接筋6。当然，在另一种实施方式，内管道2也可以全部位于第一接口4的内部而不延伸到第二接口5的内部，此时，连接筋6将第一环形腔16和第二接口5隔开，而使第一环形腔16和第二接口5互不连通。
外管道1的外周面12设有用于与采样管配合的采样接口7，该采样管与监护设备连接。气体收集器3位于内管道的第二内腔23内并与内管道2内周面的中部固定连接，纵向贯穿连接筋6和外管道1形成采样气路8，气体收集器3通过该采样气路8与采样接口7连通。气体收集器3具有内周面35和外周面31，该内周面35围出供气体通过的收集气路34，该收集气路34与采样气路8连通。
使用时，将第一接口4的第一内周面41与病人插管的接头进行连接，将第二接口5的第二外周面52与辅助呼吸设备的气路接口进行连接，将采样接口7与气体采样管连接。病人通过插管、第一接口、第二接口与辅助呼吸设备形成气路连接，同时将少量的气体通过采样接口7引入到监护设备进行分析，以监测病人状态。当病人呼出气体时，气体从病人插管流出，经过内管道2的第二内腔23流过该气路适配器并通过采样气路8进行采样。由于内管道的第二内腔23相对外管道的第一内腔13具有较小的死腔体积，减小了病人呼出气体与气路适配器内原有气体的混合，避免了混合气体对采样的干扰，从而对婴儿、小儿等低潮气量插管病人呼吸气体的监测更加准确。
气体收集器3外周面31的底端可以设有环状突起32，该环状突起32设有多个尖点33，如均匀分布的四个尖点33。当病人呼出气体流经气路适配器时，其水蒸气成分会在内管道2的内周面21凝结而产生液滴，凝结的水滴会沿气体收集器的外周面31和环状突起32流向尖点33，并从尖点33滴下，避免其被吸入到采样气路8中，从而减少液滴堵塞采样管及去染监护设备。
为了便于与病人插管配合，第一接口4的第一内周面41可以具有锥度。为了便于与辅助呼吸设备配合，第二接口5的第二外周面52也可以具有锥度。采样接口7可以为标准接口尺寸，如标准鲁尔母接口，当然，也可以为其他能够与采样管匹配的接口形式。
本实施方式中，气路适配器能够通过模具注塑一次加工成型，即外管道、内管道、采样接口、气体收集器及连接筋一体注塑成型，从而不需要组装，生产方便。该气路适配器可以采用医用级聚丙烯材料，当然，也可以采用其它的医用级材料。
本实施方式中，内管道同时伸入第一、二接口的内部；进一步的，内管道的前、后端面可以与外管道的前、后端面平齐。
如图5至图8所示，其为气路适配器的第二具体实施方式。该气路适配器包括具有第一接口4和第二接口5的外管道1、内管道2、连接筋6、气体收集器3及采样接口7，该外管道1、内管道2、连接筋6、采样接口7和气体收集器3的形状、构造、相互之间的位置连接关系等可以如第一具体实施方式所述。
与第一具体实施方式不同的是，该气路适配器还包括端盖9，该端盖9与采样接口7可拆卸连接。该端盖9具有打开状态和密封状态，在打开状态时，端盖9与采样接口7分离；在密封状态时，端盖9密封采样接口7。该端盖9还可以具有封口塞91，在密封状态时，封口塞91塞入并密封该采样接口7。
该端盖9可以通过连接柄10与外管道1的外周面12连接，该连接柄10是受到外力时能够扭转变形、外力撤销时变形回复的弹性体。在密封状态，连接柄10扭转变形；在打开状态时，连接柄10的变形回复。本实施方式中，在外管道1的圆周上，连接柄10和采样接口7错开一个角度，在打开状态时，端盖9的轴线和采样接口7的轴线异面垂直；需要密封采样接口7时，扭转连接柄10，使端盖9的封口塞91能够对准并塞入密封该采样接口7。
当不需要进行气体采样时，可以将连接柄10扭转，使封口塞91与采样接口7形成配合并密封，此时气路适配器作为接口转换元件，避免了更换额外接口转换元件等临床操作。需要进行气体采样时，取下封口塞91，连接柄10的变形回复。
对于该实施方式，气路适配器可以使用强度及韧性较好的医用级聚丙烯材料，通过模具注塑一次加工成型，无需组装、生产方便。
气路适配器具有外管道，该外管道的前部为第一接口，该外管道的后部为第二接口。该外管道可以是一体注塑成型，也可以由多个部分组装而成。外管道的内部固定有内管道，该内管道可以仅伸入第一接口，也可以同时伸入第一接口和第二接口。该内管道的前、后端面可以与外管道的前、后端面对齐，也可以不对齐。
气路适配器可以是通过注塑一次加工成型，也可以由多个部件组装而成，如由外管道、采样接口、气体收集器、连接筋及内管道组装一体。
以上内容是结合具体的实施方式对本发明所作的进一步详细说明，不能认定本发明的具体实施只局限于这些说明。对于本发明所属技术领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干简单推演或替换，都应当视为属于本发明的保护范围。

Claims (16)

  1. 一种气路适配器，包括外管道及气体收集器，所述外管道具有能够连接气路的第一接口和第二接口，其特征在于：还包括内管道，所述内管道固定在所述外管道的内部，所述内管道至少部分位于所述第一接口的内部，所述气体收集器固定在所述内管道的内部，且所述气体收集器通过采样气路与所述采样接口连通，所述采样气路径向贯穿所述内管道和外管道。
  2. 如权利要求1所述的气路适配器，其特征在于：所述外管道的内周面凸设有环形连接筋，所述连接筋套住所述内管道并与所述内管道固定，所述采样气路径向顺次贯穿所述内管道、连接筋及外管道。
  3. 如权利要求2所述的气路适配器，其特征在于：所述内管道和第一接口之间形成环绕所述内管道的第一环形腔，所述连接筋将所述第一环形腔和第二接口隔开。
  4. 如权利要求3所述的气路适配器，其特征在于：所述内管道伸入所述第二接口的内部，所述内管道与第二接口之间形成环绕所述内管道的第二环形腔，所述连接筋将所述第一环形腔和第二环形腔隔开。
  5. 如权利要求4所述的气路适配器，其特征在于：所述外管道的前、后端面分别与所述内管道的前、后端面平齐。
  6. 如权利要求4所述的气路适配器，其特征在于：所述第二环形腔内还设有至少一个加强筋，所述加强筋连接所述外管道的内周面、内管道的外周面及连接筋。
  7. 如权利要求2所述的气路适配器，其特征在于：所述气体收集器外周面的端部具有环状突起。
  8. 如权利要求7所述的气路适配器，其特征在于：所述环状突起设有多个尖点。
  9. 如权利要求2所述的气路适配器，其特征在于：所述外管道、内管道、气路收集器、采样接口及连接筋一体注塑成型。
  10. 如权利要求1所述的气路适配器，其特征在于：所述第一接口是用于与病人插管配合的接口，所述第二接口是用于与辅助呼吸设备配合的接口。
  11. 如权利要求10所述的气路适配器，其特征在于：所述第一接口的内周面和第二接口的外周面均是进行接口连接的配合面，且所述第一接口的内周面和第二接口的外周面均具有锥度。
  12. 如权利要求1-11中任意一项所述的气路适配器，其特征在于：还包括端盖，所述端盖与所述采样接口可拆卸连接，所述端盖具有打开状态和密封状态，在所述打开状态，所述端盖离开所述采样接口；在所述密封状态，所述端盖密封所述采样接口。
  13. 如权利要求12所述的气路适配器，其特征在于：所述端盖具有封口塞，在所述打开状态，所述封口塞离开所述采样接口；在所述密封状态，所述封口塞塞入并密封所述采样接口。
  14. 如权利要求13所述的气路适配器，其特征在于：还包括能够弹性变形的连接柄，所述连接柄连接所述外管道的外周面和端盖，在所述密封状态，所述连接柄扭转变形；在所述打开状态，所述连接柄的变形回复。
  15. 一种气体收集器，其特征在于：具有内周面及外周面，所述内周面围出供气体通过的收集气路，所述外周面的底端具有环状突起。
  16. 如权利要求15所述的气体收集器，其特征在于：所述环状突起设有多个尖点。
PCT/CN2012/086271 2011-12-15 2012-12-10 气路适配器 Ceased WO2013086958A1 (zh)

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