WO2019110010A1 - 一种指环式脉搏血氧仪 - Google Patents

一种指环式脉搏血氧仪 Download PDF

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Publication number
WO2019110010A1
WO2019110010A1 PCT/CN2018/119831 CN2018119831W WO2019110010A1 WO 2019110010 A1 WO2019110010 A1 WO 2019110010A1 CN 2018119831 W CN2018119831 W CN 2018119831W WO 2019110010 A1 WO2019110010 A1 WO 2019110010A1
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WO
WIPO (PCT)
Prior art keywords
photodiode
ring
pulse oximeter
emitting diode
light emitting
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PCT/CN2018/119831
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English (en)
French (fr)
Inventor
袁海权
周聪聪
Original Assignee
杭州兆观传感科技有限公司
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Application filed by 杭州兆观传感科技有限公司 filed Critical 杭州兆观传感科技有限公司
Priority to EP18885064.8A priority Critical patent/EP3721806A4/en
Priority to US16/613,552 priority patent/US20200085360A1/en
Publication of WO2019110010A1 publication Critical patent/WO2019110010A1/zh

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
    • A61B5/1455—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using optical sensors, e.g. spectral photometrical oximeters
    • A61B5/14551—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using optical sensors, e.g. spectral photometrical oximeters for measuring blood gases
    • A61B5/14552—Details of sensors specially adapted therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • A61B5/0205—Simultaneously evaluating both cardiovascular conditions and different types of body conditions, e.g. heart and respiratory condition
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
    • A61B5/6813—Specially adapted to be attached to a specific body part
    • A61B5/6825—Hand
    • A61B5/6826—Finger
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
    • A61B5/683—Means for maintaining contact with the body
    • A61B5/6831—Straps, bands or harnesses
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • A61B5/024—Detecting, measuring or recording pulse rate or heart rate
    • A61B5/02438—Detecting, measuring or recording pulse rate or heart rate with portable devices, e.g. worn by the patient

Definitions

  • the utility model relates to the field of medical instruments, in particular to a finger ring pulse oximeter.
  • Oxygen saturation is one of the key clinical physiological parameters.
  • Currently used for long-term continuous measurement there are mainly monitors for measuring host and photoelectric sensor separation or handheld oxygen saturation measuring instruments. These instruments are relatively large and are not suitable for wear. Continuous measurement. In order to make the blood oxygen saturation measuring instrument easy to wear, it is easy to fall off.
  • a ring type blood oxygen saturation measuring instrument worn on a finger which solves the problem that the finger clip type blood oxygen saturation measuring instrument is easy to fall off; Since the elastic finger sleeve or the locking strap is adapted to different sizes of fingers, the problem of over-tightening is easily caused and the finger is subjected to radial pressure for a week, so that when worn for a long time, the blood flow is not smooth and the swelling feeling is generated. , affecting wearing comfort. In addition, since the shape of the fingers is not the same, the fingers and the photosensor may not closely fit, resulting in inaccurate measurement.
  • the purpose of the utility model is to provide a ring-type pulse oximeter, which is partially stressed by a finger and closely fitted with a photoelectric sensor, can realize comfortable wearing and adaptability to different finger shapes, and improve measurement accuracy.
  • an embodiment of the present invention discloses a ring-type pulse oximeter including a rigid finger body, and a measuring unit is disposed inside the rigid ring body, and an inner circumferential surface of the rigid ring body protrudes Providing a resilient device, a photodiode, and at least one light emitting diode, the elastic device being pressed such that the photodiode and the at least one light emitting diode are in conformity with the finger when the ring pulse oximeter is worn, The light emitted by the light emitting diode is attenuated by the finger and received by the photodiode and processed by the measuring unit to calculate blood oxygen saturation.
  • the elastic device includes an elastic member and at least one pressing member, the elastic member is deformed when pressed, and one end is connected to the rigid ring body, and the other end is connected to the lowermost pressing member.
  • the elastic means includes a plurality of the pressing members, the upper layer pressing members of the adjacent two layers of the pressing members are in an original state partially embedded in the lower layer pressing members when the elastic means is not pressed.
  • the elastic device is pressed, it moves toward the inside of the lower layer pressing member, and after the pressing disappears, it is moved toward the outside of the lower layer pressing member by the urging force of the elastic member and returns to the original state.
  • the elastic member is a spring or a spring.
  • the pressing member is a hollow housing.
  • the elastic device and the photodiode and the at least one light emitting diode are located on the same side of the rigid ring body.
  • the pressed surface of the uppermost pressing member in the elastic device has a transparent portion
  • the photodiode is located inside the elastic device and is in a state of being adhered to the transparent portion.
  • the ring pulse oximeter includes two of the light emitting diodes on either side of the elastic device.
  • the photodiode and the at least one light emitting diode are respectively located on opposite sides of the elastic device.
  • the photodiode and the at least one light emitting diode are located on the same side of the rigid finger ring body, and the resilient means is located on the other side of the rigid finger ring body.
  • the elastic device includes a casing and a silica gel
  • the silica gel is fixed inside the casing and protrudes from a top end of the casing, and the silica gel deforms when pressed and moves toward the inside of the casing, After the pressing disappears, the outstanding state is restored.
  • the elastic device and the photodiode and the at least one light emitting diode are located on the same side of the rigid ring body.
  • the photodiode is located inside the elastic device and is in a state of being adhered to the silicone.
  • the ring pulse oximeter includes two of the light emitting diodes on either side of the elastic device.
  • the photodiode and the at least one light emitting diode are respectively located on opposite sides of the elastic device.
  • the photodiode and the at least one light emitting diode are located on the same side of the rigid finger ring body, and the resilient means is located on the other side of the rigid finger ring body.
  • the convex force device, the photodiode and the light-emitting diode are arranged on the rigid ring body to locally stress the finger to avoid poor blood flow.
  • FIG. 1 is a schematic view showing the overall structure of a ring type pulse oximeter according to an embodiment of the present invention
  • FIG. 2 is a schematic structural view of a resilient device on the same side as a photodiode and a light emitting diode according to an embodiment of the present invention
  • FIG. 3 is a schematic structural view of a resilient device according to an embodiment of the present invention.
  • FIG. 4 is a schematic view showing another structure of a resilient device according to an embodiment of the present invention.
  • FIG. 5 is a schematic view showing the structure of the elastic device on the different sides from the photodiode and the light emitting diode according to an embodiment of the present invention.
  • a first embodiment of the present invention relates to a ring-type pulse oximeter, comprising a rigid finger body 1 , a measuring unit 2 for measuring blood oxygen saturation inside a rigid ring body, and a rigid ring body
  • the elastic surface device 3 the photodiode and the light emitting diode are protruded on the circumferential surface.
  • the elastic device is pressed so that the photodiode and the light emitting diode are in a state of being adhered to the finger.
  • the bonding means that the photodiode and the light emitting diode are in close contact with the finger and even in direct contact with the finger;
  • the rigid ring body can be made of ceramic, metal or the like;
  • the measuring unit includes the power source and its switch, the microprocessor, The illumination driving circuit or the like to realize the measurement of blood oxygen saturation can be implemented by using the prior art;
  • the light emitting diode can be one or more, and the photodiode and the light emitting diode and the elastic device can be located on the same side of the rigid ring body (on Side, bottom, left or right), can also be on different sides.
  • FIG. 2 is a structural view showing the photodiode 4, the light-emitting diode 5, and the elastic device 3 on the same side of the rigid ring body, and the photodiode 4 is located inside the elastic device 3 and is in a state of being adhered to the pressed surface of the elastic device,
  • the light emitting diodes 5 are located on both sides of the elastic device 3.
  • a structure of the elastic device 3, as shown in Fig. 3, comprises an elastic member 6 and two layers of pressing members 7 and 8 such as a hollow casing. One end of the elastic member 6 is connected to the rigid finger ring body 1 and the other end is connected to the lower layer pressing member. 7.
  • the surface on which the upper pressing member 8 is pressed by the finger has a transparent portion.
  • the elastic device 3 When the oximeter is not worn, the elastic device 3 is not pressed, the upper pressing member 8 is in the original state partially embedded in the lower pressing member 7; when the oximeter is worn, the finger presses the elastic device 3, and the upper pressing member 8 presses down to the lower layer
  • the member 7 is internally retracted while the elastic member 6 is deformed so that the finger is in close contact with the light-emitting diode 5 and maintained in this state, and the light emitted from the light-emitting diode 5 is attenuated by the finger and is closely attached to the transparent portion of the pressed surface of the upper pressing member 8.
  • the photodiode 4 is received, and the measuring unit 2 further calculates the blood oxygen saturation; when the oximeter is removed, the elastic member 6 returns to the original shape, and the generated force causes the upper pressing member 8 to be ejected to the outside of the lower pressing member 7.
  • the stopper member 9 may be provided in the lower pressing member 7.
  • Another structure of the elastic means 3, as shown in Fig. 4, comprises a casing 10 and a silica gel 11 which is fixed inside the casing 8 and protrudes from the top end of the casing 8.
  • the finger presses the silicone 11 to retract inside the outer casing 10 while deforming it, so that the finger is in close contact with the light-emitting diode 5 and maintains the state, and the light emitted by the light-emitting diode 5 is attenuated by the finger and is
  • the photodiode 4 of the silica gel 11 is closely attached, and the measuring unit 2 further calculates the blood oxygen saturation; when the oximeter is removed, the silica gel 11 is restored to its original shape.
  • the elastic device when the oximeter is worn, the elastic device is pressed so that the finger is in close contact with the light emitting diode 5, and the radial pressure exerted on the finger by the elastic member 6 or the silicone member 11 can avoid the relationship between the finger and the rigid ring body. Relatively rotating, so that the finger is kept in close contact with the light-emitting diode 5; in addition, since the photodiode 4 and the elastic device are kept in close contact with the pressing surface, the photodiode and the finger are also kept in close contact state, and the above two points make measurement Accuracy is improved.
  • the protruding elastic device 3, the photodiode 4 and the light-emitting diode 5 make the finger partially stressed, can adapt to different shapes of fingers, can also avoid the swelling feeling caused by poor blood circulation, and is more comfortable to wear.
  • the pressing member or the silicone has a certain amount of retraction when pressed, but the finger and the LED are in close contact regardless of the amount of retraction, otherwise, other options are needed.
  • the pressing member in the elastic device may be a single layer or a plurality of layers, and the single-layer pressing member is connected to one end of the elastic member and the pressed surface has a transparent portion.
  • the structure between the multi-layer pressing members is the same as the two-layer pressing member, and the bottommost pressing member is connected to one end of the elastic member, and the pressed surface of the topmost pressing member has a transparent portion;
  • the elastic member in the elastic device may be a spring or a spring piece made of metal or the like;
  • the number of light emitting diodes may be single or multiple;
  • the photodiode may be located outside the elastic device and separated from the light emitting diode on both sides of the elastic device, and the pressed surface of the elastic device may not have a transparent portion.
  • Figure 5 shows a structural view of the photodiode 4 and the light-emitting diode 5 on the same side of the rigid finger ring body and the elastic device 3 on the other side.
  • the elastic means are respectively disposed at both ends of the diameter of the rigid finger ring body.
  • the number of light emitting diodes may be single or multiple; the elastic device may adopt any one of the above descriptions, and the pressed surface of the elastic device may not have a transparent portion.
  • the finger When wearing the oximeter, the finger contacts the light emitting diode and the photodiode and presses the elastic device, and the radial pressure applied to the finger by the elastic device due to the deformation makes the contact between the finger and the light emitting diode and the photodiode closer and maintains the State, which in turn increases measurement accuracy.
  • the protruding elastic device 3, the photodiode 4 and the light-emitting diode 5 make the finger partially stressed, can adapt to different shapes of fingers, can also avoid the swelling feeling caused by poor blood circulation, and is more comfortable to wear.
  • the pressing member or the silicone has a certain amount of retraction when pressed, but the finger is in close contact with the LED and the photodiode regardless of the amount of retraction, otherwise, Need to choose a rigid ring body of other sizes.

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  • General Health & Medical Sciences (AREA)
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Abstract

一种指环式脉搏血氧仪，包括刚性指环本体（1），该刚性指环本体（1）内部设置测量单元（2），该刚性指环本体（1）的内圆周面上凸出设置弹性装置（3）、光电二极管（4）以及至少一个发光二极管（5），当该指环式脉搏血氧仪被佩戴时，该弹性装置（3）被按压使得该光电二极管（4）和该至少一个发光二极管（5）与手指保持贴合状态，该发光二极管（5）发出的光经过手指衰减后被该光电二极管（4）接收并且由该测量单元（2）处理以计算血氧饱和度。该指环式脉搏血氧仪可使手指局部受力并与光电二极管（4）和发光二极管（5）保持紧密贴合，以实现舒适佩戴以及对不同手指形状的适应性，同时提高测量准确度。

Description

一种指环式脉搏血氧仪 技术领域
本实用新型涉及医疗器械领域，特别涉及一种指环式脉搏血氧仪。
背景技术
血氧饱和度是临床关键生理参数之一，目前用于长时间连续测量的主要有测量主机和光电传感器分离的监护仪或手持式血氧饱和度测量仪，这类仪器比较大，不适合穿戴着连续测量。为了使血氧饱和度测量仪佩戴方便不容易脱落，现有技术中存在佩戴在手指上的戒指型血氧饱和度测量仪，解决了指夹型血氧饱和度测量仪容易脱落的问题；但是由于通过弹性手指套或锁紧带适应不同尺寸的手指，容易产生佩戴过紧的问题而使手指一周遭受径向压力，因此在长时间佩戴的情况下，会使血液流动不畅并产生肿胀感，影响佩戴舒适性。此外，由于手指形状不尽相同，手指与光电传感器可能不紧密贴合，进而导致测量不准确。
实用新型内容
本实用新型的目的在于提供一种指环式脉搏血氧仪，手指局部受力并与光电传感器紧密贴合，可实现舒适佩戴以及对不同手指形状的适应性，同时提高测量准确度。
为解决上述技术问题，本实用新型的实施方式公开了一种指环式脉搏血氧仪，包括刚性指环本体，所述刚性指环本体内部设置测量单元，所述刚性指环本体的内圆周面上凸出设置弹性装置、光电二极管以及至少一个发光二极管，当所述指环式脉搏血氧仪被佩戴时，所述弹性装置被按压使得所述光电二极管和所述至少一个发光二极管与手指保持贴合状态，所述发光二极管发出的光经过手指衰减后被所述光电二极管接收并且由所述测量单元处理以计算血氧饱和度。
在一示范例中，所述弹性装置包括弹性部件以及至少一层按压部件，所述弹性部件在 受压时产生形变并且一端连接所述刚性指环本体，另一端连接最下层的所述按压部件，当所述弹性装置包括多层所述按压部件时，相邻两层所述按压部件中的较上层按压部件在所述弹性装置不受按压时处于部分嵌入较下层按压部件的原始状态，在所述弹性装置受按压时朝向所述较下层按压部件内部运动，在按压消失后受所述弹性部件的作用力而朝向所述较下层按压部件外部运动并恢复至所述原始状态。
在一示范例中，所述弹性部件为弹簧或者弹片。
在一示范例中，所述按压部件为中空壳体。
在一示范例中，所述弹性装置与所述光电二极管以及所述至少一个发光二极管位于所述刚性指环本体的同一侧。
在一示范例中，所述弹性装置中最上层所述按压部件的被按压表面具有透明部分，所述光电二极管位于所述弹性装置内部并且与所述透明部分保持贴合状态。
在一示范例中，所述指环式脉搏血氧仪包括位于所述弹性装置两侧的两个所述发光二极管。
在一示范例中，所述光电二极管和所述至少一个发光二极管分别位于所述弹性装置两侧。
在一示范例中，所述光电二极管以及所述至少一个发光二极管位于所述刚性指环本体的同一侧，所述弹性装置位于所述刚性指环本体的另一侧。
在一示范例中，所述弹性装置包括外壳和硅胶，所述硅胶固定于所述外壳内部并且从所述外壳顶端突出，所述硅胶在受按压时产生形变并且朝向所述外壳内部运动，在按压消失后恢复突出状态。
在一示范例中，所述弹性装置与所述光电二极管以及所述至少一个发光二极管位于所述刚性指环本体的同一侧。
在一示范例中，所述光电二极管位于所述弹性装置内部并且与所述硅胶保持贴合状态。
在一示范例中，所述指环式脉搏血氧仪包括位于所述弹性装置两侧的两个所述发光二极管。
在一示范例中，所述光电二极管和所述至少一个发光二极管分别位于所述弹性装置两侧。
在一示范例中，所述光电二极管以及所述至少一个发光二极管位于所述刚性指环本体的同一侧，所述弹性装置位于所述刚性指环本体的另一侧。
本实用新型实施方式与现有技术相比，主要区别及其效果在于：通过在刚性指环本体上设置凸出的弹性装置、光电二极管以及发光二极管使得手指局部受力以避免血液流动不畅，实现佩戴的舒适性以及对不同手指形状的适应性；此外，当按压弹性装置时，弹性装置对手指施加的径向作用力使得手指与光电二极管以及发光二极管保持紧密贴合状态，以提高测量的准确度。
附图说明
图1示出了根据本实用新型实施例的指环式脉搏血氧仪的整体结构示意图；
图2示出了根据本实用新型实施例的弹性装置与光电二极管以及发光二极管处于同一侧的结构示意图；
图3示出了根据本实用新型实施例的弹性装置的结构示意图；
图4示出了根据本实用新型实施例的弹性装置的另一结构示意图；
图5示出了根据本实用新型实施例的弹性装置与光电二极管以及发光二极管处于不同侧的结构示意图。
具体实施方式
在以下的叙述中，为了使读者更好地理解本申请而提出了许多技术细节。但是，本领域的普通技术人员可以理解，即使没有这些技术细节和基于以下各实施方式的种种变化和修改，也可以实现本申请各权利要求所要求保护的技术方案。
为使本实用新型的目的、技术方案和优点更加清楚，下面将结合附图对本实用新型的实施方式作进一步地详细描述。
如图1所示，本实用新型第一实施方式涉及一种指环式脉搏血氧仪，包括刚性指环本体1，刚性指环本体内部设置有测量血氧饱和度的测量单元2，刚性指环本体的内圆周面 上凸出设置有弹性装置3、光电二极管以及发光二极管，当佩戴血氧仪时，弹性装置被按压使得光电二极管和发光二极管与手指保持贴合状态。其中，贴合是指光电二极管和发光二极管与手指处于紧密贴近状态，甚至与手指直接接触；刚性指环本体可以由陶瓷、金属等材料制成；测量单元中包含电源及其开关、微处理器、发光驱动电路等以实现血氧饱和度的测量，可以采用现有技术实现；发光二级管可以是一个或者多个，光电二极管和发光二极管与弹性装置在刚性指环本体上可以位于同一侧(上侧、下侧、左侧或者右侧)，也可以位于不同侧。
图2示出了光电二极管4、发光二极管5以及弹性装置3在刚性指环本体上位于同一侧时的结构图，光电二极管4位于弹性装置3内部并且与弹性装置被按压表面保持贴合状态，两个发光二极管5位于弹性装置3两侧。弹性装置3的一种结构如图3所示，包括弹性部件6和两层例如为中空壳体的按压部件7和8，弹性部件6的一端连接刚性指环本体1，另一端连接下层按压部件7，上层按压部件8被手指按压的表面具有透明部分。当未佩戴血氧仪时，弹性装置3不受按压，上层按压部件8处于部分嵌入下层按压部件7的原始状态；当佩戴血氧仪时，手指按压弹性装置3，上层按压部件8向下层按压部件7内部缩进同时弹性部件6产生变形，使得手指与发光二极管5紧密接触并保持该状态，发光二极管5发出的光经手指衰减后被与上层按压部件8的被按压表面的透明部分紧密贴合的光电二极管4所接收，测量单元2进一步计算血氧饱和度；当取下血氧仪时，弹性部件6恢复原形，其产生的作用力使得上层按压部件8向下层按压部件7外部弹出，为避免上层按压部件8被完全弹出下层按压部件7并且恢复至原始状态，可以在下层按压部件7中设置限位部件9。
弹性装置3的另一种结构如图4所示，包括外壳10和硅胶11，硅胶11固定于外壳8内部并且从所述外壳8顶端突出。当佩戴血氧仪时，手指按压硅胶11使其向外壳10内部缩进同时使其产生变形，使得手指与发光二极管5紧密接触并保持该状态，发光二极管5发出的光经手指衰减后被与硅胶11紧密贴合的光电二极管4所接收，测量单元2进一步计算血氧饱和度；当取下血氧仪时，硅胶11恢复原形。
在上述实施例中，佩戴血氧仪时，按压弹性装置使得手指与发光二极管5紧密接触，而弹性部件6或者硅胶11因变形对手指施加的径向压力可以避免手指与刚性指环本体之间的相对转动，从而使得手指与发光二极管5保持紧密接触状态；此外，由于光电二极管4 与弹性装置被按压表面保持紧密贴合状态，因此光电二极管与手指也保持紧密贴合状态，上述两点使得测量准确度得以提高。突出设置的弹性装置3、光电二极管4以及发光二极管5使得手指局部受力，可以适应不同形状的手指，也能避免血液流通不畅产生的肿胀感，佩戴较舒适。为适应不同粗细的手指，在弹性装置中，按压部件或者硅胶在受压时具有一定的缩进量，但是不管缩进量大小如何，手指与发光二极管都是紧密接触的，否则，需要选择其他尺寸的刚性指环本体。
此外，在上述实施例中，还可以进行其他选择的设置，例如弹性装置中的按压部件可以是单层或者多层，单层按压部件与弹性部件一端相连接且其被按压表面具有透明部分，多层按压部件之间的结构与两层按压部件相同，且最底层按压部件与弹性部件一端相连接，最顶层按压部件的被按压表面具有透明部分；弹性装置中的弹性部件可以是弹簧或者由金属等制成的弹片；发光二极管的数量可以是单个或者多个；光电二极管可以位于弹性装置外部并且与发光二极管分列在弹性装置两侧，此时弹性装置的被按压表面可以不具有透明部分，当佩戴血氧仪时，手指按压弹性装置并且弹性装置产生变形，使得手指与发光二极管和光电二极管紧密接触并保持该状态。
图5示出了光电二极管4和发光二极管5在刚性指环本体上位于同一侧而弹性装置3位于另一侧时的结构图，优选地，若将光电二极管和发光二极管看成一个整体，那么其与弹性装置分别设置在刚性指环本体的直径两端。其中，发光二极管的数量可以是单个或多个；弹性装置可以采用以上描述中的任意一种，并且弹性装置的被按压表面可以不具有透明部分。当佩戴血氧仪时，手指与发光二极管和光电二极管接触并按压弹性装置，弹性装置因变形而向手指施加的径向压力使得手指与发光二极管和光电二极管之间的接触更为紧密并保持该状态，进而提高测量准确度。突出设置的弹性装置3、光电二极管4以及发光二极管5使得手指局部受力，可以适应不同形状的手指，也能避免血液流通不畅产生的肿胀感，佩戴较舒适。为适应不同粗细的手指，在弹性装置中，按压部件或者硅胶在受压时具有一定的缩进量，但是不管缩进量大小如何，手指与发光二极管、光电二极管都是紧密接触的，否则，需要选择其他尺寸的刚性指环本体。
需要说明的是，在本专利的权利要求和说明书中，诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且，术语“包括”、“包含”或者其 任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。
虽然通过参照本实用新型的某些优选实施方式，已经对本实用新型进行了图示和描述，但本领域的普通技术人员应该明白，可以在形式上和细节上对其作各种改变，而不偏离本实用新型的精神和范围。

Claims (15)

  1. 一种指环式脉搏血氧仪，其特征在于，包括刚性指环本体(1)，所述刚性指环本体(1)内部设置测量单元(2)，所述刚性指环本体(1)的内圆周面上凸出设置弹性装置(3)、光电二极管(4)以及至少一个发光二极管(5)，当所述指环式脉搏血氧仪被佩戴时，所述弹性装置(3)被按压使得所述光电二极管(4)和所述至少一个发光二极管(5)与手指保持贴合状态，所述发光二极管(5)发出的光经过手指衰减后被所述光电二极管(4)接收并且由所述测量单元(2)处理以计算血氧饱和度。
  2. 根据权利要求1所述的指环式脉搏血氧仪，其特征在于，所述弹性装置(3)包括弹性部件(6)以及至少一层按压部件，所述弹性部件(6)在受压时产生形变并且一端连接所述刚性指环本体(1)，另一端连接最下层的所述按压部件，当所述弹性装置(3)包括多层所述按压部件时，相邻两层所述按压部件中的较上层按压部件在所述弹性装置(3)不受按压时处于部分嵌入较下层按压部件的原始状态，在所述弹性装置(3)受按压时朝向所述较下层按压部件内部运动，在按压消失后受所述弹性部件(6)的作用力而朝向所述较下层按压部件外部运动并恢复至所述原始状态。
  3. 根据权利要求2所述的指环式脉搏血氧仪，其特征在于，所述弹性部件为弹簧或者弹片。
  4. 根据权利要求2所述的指环式脉搏血氧仪，其特征在于，所述按压部件为中空壳体。
  5. 根据权利要求2-4中任意一项所述的指环式脉搏血氧仪，其特征在于，所述弹性装置(3)与所述光电二极管(4)以及所述至少一个发光二极管(5)位于所述刚性指环本体(1)的同一侧。
  6. 根据权利要求5所述的指环式脉搏血氧仪，其特征在于，所述弹性装置(3)中最上层所述按压部件的被按压表面具有透明部分，所述光电二极管(4)位于所述弹性装置(3)内部并且与所述透明部分保持贴合状态。
  7. 根据权利要求6所述的指环式脉搏血氧仪，其特征在于，包括位于所述弹性装置(3)两侧的两个所述发光二极管(5)。
  8. 根据权利要求5所述的指环式脉搏血氧仪，其特征在于，所述光电二极管(4)和所述至少一个发光二极管(5)分别位于所述弹性装置(3)两侧。
  9. 根据权利要求2-4中任一项所述的指环式脉搏血氧仪，其特征在于，所述光电二极管(4)以及所述至少一个发光二极管(5)位于所述刚性指环本体(1)的同一侧，所述弹性装置(3)位于所述刚性指环本体(1)的另一侧。
  10. 根据权利要求1所述的指环式脉搏血氧仪，其特征在于，所述弹性装置包括外壳(10)和硅胶(11)，所述硅胶(11)固定于所述外壳(10)内部并且从所述外壳(10)顶端突出，所述硅胶(11)在受按压时产生形变并且朝向所述外壳(10)内部运动，在按压消失后恢复突出状态。
  11. 根据权利要求10所述的指环式脉搏血氧仪，其特征在于，所述弹性装置(3)与所述光电二极管(4)以及所述至少一个发光二极管(5)位于所述刚性指环本体(1)的同一侧。
  12. 根据权利要求11所述的指环式脉搏血氧仪，其特征在于，所述光电二极管(4)位于所述弹性装置(3)内部并且与所述硅胶(11)保持贴合状态。
  13. 根据权利要求12所述的指环式脉搏血氧仪，其特征在于，包括位于所述弹性装置(3)两侧的两个所述发光二极管(5)。
  14. 根据权利要求11所述的指环式脉搏血氧仪，其特征在于，所述光电二极管(4)和所述至少一个发光二极管(5)分别位于所述弹性装置(3)两侧。
  15. 根据权利要求10所述的指环式脉搏血氧仪，其特征在于，所述光电二极管(4)以及所述至少一个发光二极管(5)位于所述刚性指环本体(1)的同一侧，所述弹性装置(3)位于所述刚性指环本体(1)的另一侧。
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