WO2017056870A1 - 静脈可視化装置 - Google Patents
静脈可視化装置 Download PDFInfo
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- WO2017056870A1 WO2017056870A1 PCT/JP2016/076127 JP2016076127W WO2017056870A1 WO 2017056870 A1 WO2017056870 A1 WO 2017056870A1 JP 2016076127 W JP2016076127 W JP 2016076127W WO 2017056870 A1 WO2017056870 A1 WO 2017056870A1
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- Prior art keywords
- unit
- imaging unit
- vein
- light
- vein visualization
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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
- A61B5/48—Other medical applications
- A61B5/4887—Locating particular structures in or on the body
- A61B5/489—Blood vessels
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
- A61B5/0075—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence by spectroscopy, i.e. measuring spectra, e.g. Raman spectroscopy, infrared absorption spectroscopy
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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
- A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
- A61B5/107—Measuring physical dimensions, e.g. size of the entire body or parts thereof
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/74—Details of notification to user or communication with user or patient ; user input means
- A61B5/742—Details of notification to user or communication with user or patient ; user input means using visual displays
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/50—Supports for surgical instruments, e.g. articulated arms
-
- 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
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
-
- 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
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/42—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests having means for desensitising skin, for protruding skin to facilitate piercing, or for locating point where body is to be pierced
- A61M5/427—Locating point where body is to be pierced, e.g. vein location means using ultrasonic waves, injection site templates
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/04—Synchronising
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/30—Transforming light or analogous information into electric information
- H04N5/33—Transforming infrared radiation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V2201/00—Indexing scheme relating to image or video recognition or understanding
- G06V2201/03—Recognition of patterns in medical or anatomical images
Definitions
- This disclosure relates to a non-contact near-infrared vein visualization device.
- the display unit of the device is a wearable computer such as a head-mounted display or a glasses-type display as in Patent Document 1 or 2, it is necessary for a medical worker to wear it every time a puncturing operation is performed, and the usability is poor.
- wearable computers are often expensive.
- Patent Document 3 or 4 a technique for projecting a vein image on a puncture site of a patient requires advanced image processing, and the apparatus is often expensive.
- Patent Document 5 if the optical axis of the camera and the optical axis of the light source are arranged in parallel, halation may occur and it may be difficult to confirm the vein image.
- An object of the present disclosure is to provide a vein visualization device that is small, lightweight, and has excellent operability.
- the vein visualization device includes an irradiation unit that irradiates a puncture site with light including a wavelength component of 900 to 1500 nm, and an infrared transmission filter, and receives the light transmitted through the infrared transmission filter and receives the light.
- Non-contact type comprising: an imaging unit that images a puncture site; an image processing unit that extracts a vein from a captured image of the imaging unit; a display unit that displays an image processed by the image processing unit; and a power unit
- the irradiation unit includes a plurality of light sources having an optical axis inclined at an angle of 15 ° to 60 ° with respect to the optical axis of the imaging unit, and a directivity angle of light emitted from the light source 2 ⁇ 1 / 2 is 40 ° or more.
- a polarizing filter is not disposed on the optical path from the irradiation unit to the imaging unit.
- a polarizing filter is provided, the light received by the imaging unit becomes weak, so it is necessary to increase the ISO sensitivity, and the sharpness of the image tends to deteriorate.
- a more detailed image can be obtained.
- the polarizing filter is provided, the aperture of the subject lens cannot be further reduced, and the depth of field tends to be shallow.
- the provision of the polarizing filter can prevent the depth of field from becoming shallow. .
- each irradiation region of the light source overlaps within the field of view of the imaging unit.
- the puncture site can be illuminated more uniformly, and as a result, the vein of the puncture site can be more reliably imaged.
- the irradiating unit emits pulse light
- the imaging timing of the imaging unit is 10 to 30 strokes / second
- the emission timing of the irradiating unit and the imaging timing of the imaging unit are It is preferable to further include a control unit for synchronization. Power consumption can be reduced.
- the irradiation unit is provided in the first housing
- the display unit is provided in the second housing
- the first housing and the second housing can be folded. It is preferable that the irradiating unit and the display unit are connected to each other and are arranged on the outer surfaces when the first housing and the second housing are folded.
- the orientation of the display unit can be adjusted to an angle that is easy for the operator to see, improving workability. Further, the size can be further reduced.
- the imaging unit is provided in the first casing. Further downsizing is possible, which is suitable for the handy type.
- the imaging unit is provided in a third casing fixed to the first casing.
- the vein visualization device further includes a support portion that supports the third housing so as to be movable in the vertical direction.
- the vein visualization device becomes a stand type, and an operator can perform a puncturing operation without holding the vein visualization device by hand. For this reason, the puncturing operation is further simplified.
- the vein visualization device preferably further includes a flexible arm. Puncturing work in an ambulance where a worker is forced to work in a limited space with a lot of emergency medical equipment loaded in a moving vehicle with vibration, without holding the vein visualization device by hand Can be performed safely and reliably. For this reason, the puncturing operation is further simplified.
- the present disclosure can provide a vein visualization device that is small, lightweight, and has excellent operability.
- FIG. 1 is a schematic front view showing a first example of a vein visualization apparatus according to this embodiment.
- the vein visualization device 1 includes an irradiation unit 10 that irradiates a puncture site 901 with light including a wavelength component of 900 to 1500 nm, and an infrared transmission filter 21, and light that has passed through the infrared transmission filter 21.
- the imaging unit 20 that receives the light and picks up the puncture site 901, the image processing unit 30 that extracts the vein from the captured image of the imaging unit 20, the display unit 40 that displays the image processed by the image processing unit 30, and the power source
- the irradiation unit 10 has a light source 11 having an optical axis L1 inclined at an angle A of 15 ° to 60 ° with respect to the optical axis L2 of the imaging unit 20.
- the directivity angle 2 ⁇ 1 / 2 of the light emitted from the light source 11 is 40 ° or more.
- the irradiation unit 10 emits light including a wavelength component of 900 to 1500 nm from the light source 11 toward the puncture site 901.
- the light source 11 is, for example, an infrared LED.
- the peak wavelength of the light source 11 is preferably 850 nm or 940 nm, and more preferably 940 nm.
- the irradiation unit 10 may irradiate light including a wavelength component of at least 900 to 1500 nm, and irradiates light including a wavelength component of less than 900 nm and / or a wavelength component of more than 1500 nm in addition to the wavelength component of 900 to 1500 nm. May be.
- the irradiation part 10 may have a visible light source (not shown) as needed.
- the visible light source is a light source that emits light including a wavelength component of 380 to 780 nm.
- the puncture site 901 is a part of the patient's arm 900, for example.
- the imaging unit 20 includes a lens and an imaging element.
- the lens collects the reflected light from the puncture site 901 and forms an image on the light receiving surface of the image sensor.
- the imaging element converts light and darkness of the image formed by the lens into an electric signal.
- the image sensor is, for example, a CCD image sensor or a CMOS image sensor.
- the imaging unit 20 has an infrared transmission filter 21 and does not have a heat ray absorption filter.
- the infrared transmission filter 21 is a filter that absorbs visible light and transmits infrared light.
- the heat ray absorption filter is a filter that absorbs infrared light and transmits visible light. Therefore, since the imaging unit 20 includes the infrared transmission filter 21 and does not include the heat ray absorption filter, the reflected light in the infrared region can be imaged.
- the image processing means 30 receives an electrical signal from the image sensor of the imaging unit 20 and generates an image to be displayed on the display unit 40.
- the image processing means 30 may adjust the brightness or contrast of the image as necessary. Further, the image processing unit 30 may perform processing for enhancing a vein image such as coloring a vein portion in the image.
- the display unit 40 displays the image processed by the image processing means 30.
- the display unit 40 is, for example, a liquid crystal panel.
- the puncture site 901 is irradiated with light containing a wavelength component of 900 to 1500 nm
- the infrared rays are absorbed by blood in the vein portion, so that the reflectance becomes relatively low.
- the display unit 40 displays an image in which the vein pattern is darkly displayed on the other part of the puncture site 901 and the vein is visualized.
- the operator can perform a puncturing operation while looking at the display unit 40 without feeling uncomfortable.
- the absorption rate of water is higher than the absorption rate of deoxyhemoglobin in the wavelength range longer than 900 nm, and the contrast Higher vein patterns can be obtained.
- the power supply unit (not shown) may be a commercial power supply or a battery.
- a polarizing filter is not disposed on the optical path P from the irradiation unit 10 to the imaging unit 20.
- the optical path P from the irradiation unit 10 to the imaging unit 20 is a path from the light irradiated from the light source 11 of the irradiation unit 10 to the imaging element of the imaging unit 20 reflected by the puncture site 901.
- the effect of using a polarizing filter is to suppress halation due to regular reflection, but at the same time, the amount of transmitted light is attenuated.
- the light receiving sensitivity of the CCD or C-MOS imager near the near infrared region (900 to 1000 nm) is relatively low.
- the image is degraded by noise.
- the halation is suppressed by adjusting the irradiation angle with respect to the optical axis L2 of the imaging unit 20 of the irradiation unit 10 rather than obtaining a deteriorated image due to noise at the expense of the amount of received light using a polarizing filter, and consequently Priority was given to obtaining clear images with less noise. If a polarizing filter is provided on the optical path P, the light received by the imaging unit 20 becomes weak.
- the polarizing filter is provided, the aperture of the subject lens cannot be further reduced, and the depth of field tends to be shallow. However, the provision of the polarizing filter can prevent the depth of field from becoming shallow. .
- the irradiation unit 10 has a light source having an optical axis L1 inclined at an angle A of 15 ° to 60 ° with respect to the optical axis L2 of the imaging unit 20 (hereinafter may be referred to as a first light source). 11 is provided.
- the angle A formed by each optical axis L1 of the first light source 11 and the optical axis L2 of the imaging unit 20 is more preferably 30 ° or more. Even if the puncture site 901 is a curved surface, halation can be prevented more reliably. More preferably, the angle is 35 ° to 55 °.
- Each optical axis L1 of the first light source 11 is a straight line extending in the traveling direction of the light emitted from each light source 11, and the light spreads symmetrically with respect to the straight line.
- FIG. 1 only the optical axis L ⁇ b> 1 of a certain light source 11 is shown as a representative, and the optical axes of the light sources 11 other than the light source 11 are omitted.
- Each optical axis L1 of the first light source 11 may have an angle A with respect to the optical axis L2 of the imaging unit 20 within a range of 15 ° to 60 °, and may be parallel to each other or directed in different directions. There may be an optical axis.
- the optical axis L2 of the imaging unit 20 is a straight line that passes through the center of the lens of the imaging unit 20 and is perpendicular to the lens surface.
- the direction of the optical axis L2 of the imaging unit 20 is preferably the normal direction of the planned placement surface 902 of the puncture site.
- the planned placement surface 902 is a virtual plane in a space where the puncture site 901 is to be placed, and is a surface parallel to the work surface 903 on which the puncture site 901 is placed during puncture work. That is, when performing the puncturing operation with the puncture site 901 placed on a horizontal plane, the arrangement planned surface 902 is a horizontal plane.
- the planned placement surface 902 is inclined with respect to the horizontal plane according to the inclination of the surface on which the puncture site 901 is placed.
- the imaging unit 20 images the puncture site 901 from directly above, so that the operator can easily grasp the sense of distance. If the angle A formed by each optical axis L1 of the first light source 11 and the optical axis L2 of the imaging unit 20 is less than 15 °, halation is likely to occur, and it is difficult to confirm the vein image.
- each optical axis L1 of the first light source 11 and the optical axis L2 of the imaging unit 20 exceeds 60 °, the illuminance of the light that illuminates the puncture site becomes low, making it difficult to check the vein image. .
- the number of the first light sources 11 is preferably 2 to 30, and more preferably 5 to 15. If the number of the first light sources 11 is one, the area that can be irradiated is narrow, and the puncture site 901 cannot be illuminated uniformly. In the present embodiment, the puncture site 901 can be illuminated uniformly by providing a plurality of first light sources 11. As a result, a clearer vein image can be obtained.
- the irradiation unit 10 includes the light from the imaging unit 20 in addition to the first light source 11 having the optical axis L1 inclined at an angle A of 15 ° to 60 ° with respect to the optical axis L2 of the imaging unit 20.
- a second light source (not shown) having an optical axis inclined at less than 15 ° with respect to the axis L2, and / or a third optical axis inclined at an angle exceeding 60 ° with respect to the optical axis L2 of the imaging unit 20.
- the light source (not shown) may be included.
- the ratio of the number of the first light sources to the total number of the first light source 11, the second light source, and the third light source is preferably 80% or more, more preferably 90% or more, and 100%. It is particularly preferred that
- FIG. 2 is an example of a light emission characteristic diagram of a light source used in the vein visualization apparatus according to the present embodiment.
- the directivity angle 2 ⁇ 1 / 2 of the light emitted from the first light source 11 is 40 ° or more.
- the directivity angle 2 ⁇ 1 / 2 is more preferably 90 ° or more, and further preferably 120 ° or more. If the directivity angle 2 ⁇ 1 / 2 is less than 40 °, the puncture site cannot be illuminated uniformly and a clear vein image cannot be obtained. In addition, in order to uniformly illuminate the puncture site, it is necessary to arrange a large number of light sources without gaps, and the apparatus becomes large.
- the light source 11 is fixed at the center of the circle, the light receiving sensor is moved along the circumference, the illuminance of the emitted light emitted from the light source 11 is measured, and the optical axis L1 of the light source 11 is measured.
- the upper illuminance is normalized so that the maximum value of illuminance is 1 (100%), and the reduction ratio of the illuminance when ⁇ is inclined from the axis is represented by a graphic.
- An angle at which the illuminance becomes 0.5 (50%) is referred to as a half-value angle ⁇ 1 / 2, and a full angle including both sides is defined as a directivity angle 2 ⁇ 1 / 2.
- FIG. 3 is a schematic diagram illustrating an example of the relationship between the visual field range of the imaging unit and each irradiation region of the light source.
- the irradiation region 60 is a space irradiated with light emitted from the first light source 11 (shown in FIG. 1).
- the field-of-view range 70 of the imaging unit is a space that can be photographed when the position of the imaging unit 20 (shown in FIG. 1) is fixed and focused at an arbitrary distance, and the optical axis L2 (FIG. 1) of the imaging unit.
- the irradiation region 60 and the visual field region 70 illustrate a cross section orthogonal to the optical axis L2 of the imaging unit at the photographing distance when the puncture site is focused.
- the entire visual field range 70 can be illuminated uniformly as shown in FIG.
- part is arrange
- the irradiation region 60 is preferably overlapped when the relative light intensity of the light emitted from each light source 11 is 50 to 100%.
- the aperture of the lens can be further reduced, and the depth of field can be increased.
- the irradiation unit 10 (illustrated in FIG. 1) emits pulses, and the imaging timing of the imaging unit 20 is 10 to 30 images / second. It is preferable to further include a control unit (not shown) that synchronizes the light emission timing of the unit 10 and the imaging timing of the imaging unit 20 (shown in FIG. 1). Power consumption can be suppressed by emitting pulses. In addition, by setting the imaging timing of the imaging unit 20 to 10 to 30 images / second, a smooth moving image can be obtained while reducing cost and power consumption.
- the imaging timing of the imaging unit 20 is more preferably 15 to 25 images / second.
- the irradiation unit 10 is provided in the first housing 51
- the display unit 40 is provided in the second housing 52
- the first housing 51 and The second housing 52 is connected so as to be foldable, and the irradiation unit 10 and the display unit 40 are arranged on surfaces 51 a and 52 a that are outside when the first housing 51 and the second housing 52 are folded, respectively.
- the direction of the display part 40 can be adjusted to the angle which an operator can see easily, and workability
- casing 52 so that folding is possible for example, as shown in FIG. 1, the hinge connected with the edge part of the 1st housing
- the portion 53 is provided.
- the vein visualization device 1 is preferably a stand type as shown in FIG. Specifically, the vein visualization device 1 includes a first housing 51 provided with the irradiation unit 10, and a second housing 52 provided with the display unit 40 and foldably connected to the first housing 51. It is preferable to include a third casing 54 fixed to the first casing 51 and having the imaging unit 20 provided on the lower surface thereof, and a support portion 55 that supports the third casing 54 so as to be movable in the vertical direction. .
- the angle formed between each optical axis L1 of the light source 11 and the optical axis L2 of the imaging unit 20 is set to 15 ° to 60 °.
- the distance between the puncture site 901 and the irradiation unit 10 and the imaging unit 20 can be appropriately set, and the apparatus can be further downsized.
- the first casing 51 is preferably extended obliquely downward with respect to the third casing 54.
- the light source 11 of the irradiation unit 10 can be brought closer to the puncture site 901, and light with higher illuminance can be applied to the puncture site 901. As a result, a clearer vein image can be obtained.
- the third housing 54 may incorporate the image processing means 30.
- the lower end of the support portion 55 may be fixed to a cradle 56 on which the patient's arm 900 is placed, or a clip (not shown) may be provided to attach the support portion 55 to a work table or the like. Good.
- FIG. 4 is a schematic front view showing a second example of the vein visualization apparatus according to the present embodiment.
- the imaging unit 20 is preferably provided in the first housing 151.
- the vein visualization device 100 of the second example shown in FIG. 4 is different from the vein visualization device 1 of the first example shown in FIG. 1 in that the imaging unit 20 is provided in the first housing 151. Otherwise, the basic configuration is the same as that of the vein visualization apparatus 1 of the first example. 1 and 4 are denoted by the same reference numerals.
- the vein visualization apparatus 100 shown in FIG. 4 can be further downsized.
- the vein visualization device 100 is suitable for a handy type because it is easy to work with a hand.
- the imaging unit 20 is preferably attached to the surface of the first housing 151 to which the irradiation unit 10 is attached.
- the vein visualization device 1, 100 is a light and simple structure by integrating the irradiation unit 10, the imaging unit 20, and the display unit 40. It can be easily carried around. For this reason, it can be used regardless of time and place, whether indoors or outdoors, even during movement such as in a car or airplane.
- the vein visualization device 1100 may have a flexible arm (not shown).
- the flexible arm is provided at one end portion of the arm portion, the first attachment portion that is attached to the vein visualization device 1, 100, and the arm portion 900 of the patient is provided at the other end portion of the arm portion.
- a second mounting portion that is mounted to the cradle 56 or the work table.
- the arm portion is a rod-like or tubular portion having a material or a structure that can be freely deformed and maintain the deformed state.
- the first attachment portion is, for example, a clip or a protrusion that fits into an attachment hole provided in the vein visualization device 1, 100.
- the first attachment portion may be detachable from the vein visualization device 1, 100, or may be integrated with the vein visualization device 1, 100.
- the second attachment portion is, for example, a clip or a clamp.
- the support portion 55 may be replaced with a flexible arm.
- the first attachment portion of the flexible arm is preferably attached to the first housing 51, the second housing 52, the hinge portion 53, or the third housing 54.
- the first attachment portion of the flexible arm is preferably attached to the first housing 151, the second housing 152, or the hinge portion 53.
- the operator can perform a puncture operation without holding the vein visualization device 1, 100 by hand (hand-free) by using a stand type or providing a flexible arm. It can be carried out. For this reason, the puncturing operation is further simplified.
- a flexible arm is provided, it is suitable for use in a moving vehicle with vibration, particularly in an ambulance in which a large number of emergency medical devices are loaded and work in a limited space is unavoidable.
- the irradiation unit 10 and the imaging unit 20 can be fixed at appropriate positions with respect to the patient, a clearer vein image can be obtained.
- Example 1 The vein of the arm part was observed using the vein visualization apparatus 1 shown in FIG.
- the light source 11 uses 12 LEDs having a directivity angle 2 ⁇ 1 / 2 of 128 ° and a peak wavelength of 940 nm.
- the plurality of light sources 11 were arranged so that the respective irradiation ranges overlapped on the puncture site.
- the optical axis 11 is arranged so that an angle A formed by each optical axis L1 of the light source 11 and the optical axis L2 of the imaging unit falls within a range of 15 ° to 60 °.
- Example 2 The same procedure as in Example 1 was performed except that the light source 11 was changed to an LED having a directivity angle 2 ⁇ 1 / 2 of 44 ° and a peak wavelength of 940 nm.
- Example 1 The same procedure as in Example 1 was performed except that the light source 11 was changed to an LED having a directivity angle 2 ⁇ 1 / 2 of 20 ° and a peak wavelength of 940 nm.
- Example 1 was the same as Example 1 except that the arrangement of the optical axis 11 was changed so that the angle A formed by each optical axis L1 of the light source 11 and the optical axis L2 of the imaging unit was in the range of 0 ° to 10 °.
- Example 1 was the same as Example 1 except that the arrangement of the optical axis 11 was changed so that the angle A formed by each optical axis L1 of the light source 11 and the optical axis L2 of the imaging unit was in the range of 65 ° to 120 °.
- Irradiation unit 11
- Light source (first light source) 20
- Imaging unit 21
- Infrared transmission filter 30
- Image processing means 40
- Surface 53 hinge part 54
- Third casing 55
- Supporting part 56
- Receiving base 60
- Irradiation Field 70
- Field of view 900
- Arm 901 Puncture site
- L2 of light source Optical axis P of imaging unit
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Abstract
Description
図1に示す静脈可視化装置1を用いて、腕部の静脈を観察した。静脈可視化装置1において、光源11は、指向角2θ1/2が128°、ピーク波長940nmのLEDを12個用いた。複数個の光源11は、各照射範囲が穿刺部位上で重畳するように配置した。光源11の各光軸L1と撮像部の光軸L2とのなす角度Aが15°~60°の範囲に入るように光軸11を配置した。
光源11を指向角2θ1/2が44°、ピーク波長940nmのLEDに変更した以外は、実施例1と同様とした。
光源11を指向角2θ1/2が20°、ピーク波長940nmのLEDに変更した以外は、実施例1と同様とした。
光源11の各光軸L1と撮像部の光軸L2とのなす角度Aが0°~10°の範囲に入るように光軸11の配置を変更した以外は、実施例1と同様とした。
光源11の各光軸L1と撮像部の光軸L2とのなす角度Aが65°~120°の範囲に入るように光軸11の配置を変更した以外は、実施例1と同様とした。
10 照射部
11 光源(第一の光源)
20 撮像部
21 赤外透過フィルター
30 画像処理手段
40 表示部
51,151 第1筐体
52 第2筐体
51a,52a 外側になる面
53 ヒンジ部
54 第3筐体
55 支持部
56 受台
60 照射領域
70 視野範囲
900 腕部
901 穿刺部位
902 配置予定面
903 作業面
L1 光源の光軸
L2 撮像部の光軸
P 照射部から撮像部までの光路
Claims (9)
- 900~1500nmの波長成分を含む光を穿刺部位に照射する照射部と、
赤外透過フィルターを有し、該赤外透過フィルターを透過した光を受光して前記穿刺部位を撮像する撮像部と、
該撮像部の撮像画像から静脈を抽出処理する画像処理手段と、
該画像処理手段が処理した画像を表示する表示部と、
電源部とを備える非接触型の静脈可視化装置において、
前記照射部は、前記撮像部の光軸に対して15°~60°の角度で傾斜した光軸を有する光源を複数個有し、
前記光源から照射される光の指向角2θ1/2は、40°以上であることを特徴とする静脈可視化装置。 - 前記照射部から前記撮像部までの光路上に、偏光フィルターが配置されていないことを特徴とする請求項1に記載の静脈可視化装置。
- 前記光源の各照射領域の一部又は全体が、前記撮像部の視野範囲内で重畳することを特徴とする請求項1又は2に記載の静脈可視化装置。
- 前記照射部は、パルス発光し、
前記撮像部の撮像タイミングは、10~30画/秒であり、
前記照射部の発光タイミングと前記撮像部の撮像タイミングとを同期させる制御部を更に備えることを特徴とする請求項1~3のいずれか一つに記載の静脈可視化装置。 - 前記照射部が第1筐体に設けられ、
前記表示部が第2筐体に設けられ、
前記第1筐体と前記第2筐体とは、折り畳み可能に連結され、
前記照射部と前記表示部とは、前記第1筐体と前記第2筐体とを折り畳んだ時に外側になる面にそれぞれ配置されることを特徴とする請求項1~4のいずれか一つに記載の静脈可視化装置。 - 前記撮像部が、前記第1筐体に設けられていることを特徴とする請求項5に記載の静脈可視化装置。
- 前記撮像部が、前記第1筐体に固定された第3筐体に設けられていることを特徴とする請求項5に記載の静脈可視化装置。
- 前記第3筐体を上下方向に移動可能に支持する支持部を更に有することを特徴とする請求項7に記載の静脈可視化装置。
- フレキシブルアームを更に有することを特徴とする請求項5~7のいずれか一つに記載の静脈可視化装置。
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GB1803402.5A GB2556796A (en) | 2015-09-30 | 2016-09-06 | Vein visualization device |
US15/756,339 US20180279945A1 (en) | 2015-09-30 | 2016-09-06 | Vein visualization device |
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Cited By (2)
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CN108451557A (zh) * | 2017-06-14 | 2018-08-28 | 江守军 | 一种肝胆外科手术用撑固装置 |
WO2022176975A1 (ja) * | 2021-02-19 | 2022-08-25 | 国立大学法人千葉大学 | 静脈撮像装置、静脈撮像方法 |
Families Citing this family (6)
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CN108744171A (zh) * | 2018-03-28 | 2018-11-06 | 芜湖聚潮信息科技有限公司 | 一种注射辅助装置 |
EP4220188A1 (en) | 2018-07-25 | 2023-08-02 | Daicel Corporation | Measurement system, measurement method, injector, and method for injecting biomolecule-containing solution into-to-be injected cell using same |
CN111529833A (zh) * | 2020-05-11 | 2020-08-14 | 上海交通大学医学院附属瑞金医院 | 一种便于固定静脉无创穿刺的装置 |
CN112515638A (zh) * | 2020-12-02 | 2021-03-19 | 杭州医学院 | 一种静脉血管显像仪 |
CN113854964B (zh) * | 2021-09-28 | 2023-08-01 | 徐州医科大学附属医院 | 一种静脉注射穿刺支架 |
CN114887156A (zh) * | 2022-05-09 | 2022-08-12 | 宁波大学医学院附属医院 | 一种静脉穿刺装置 |
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- 2015-09-30 JP JP2015194188A patent/JP6700703B2/ja not_active Expired - Fee Related
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2016
- 2016-09-06 US US15/756,339 patent/US20180279945A1/en not_active Abandoned
- 2016-09-06 WO PCT/JP2016/076127 patent/WO2017056870A1/ja active Application Filing
- 2016-09-06 GB GB1803402.5A patent/GB2556796A/en not_active Withdrawn
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JP2010000218A (ja) * | 2008-06-20 | 2010-01-07 | Terumo Corp | 静脈表示装置 |
JP2011160891A (ja) * | 2010-02-05 | 2011-08-25 | Kanazawa Univ | 静脈可視化装置 |
WO2012067022A1 (ja) * | 2010-11-15 | 2012-05-24 | Onishi Tatsuki | 血管表示装置 |
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CN108451557A (zh) * | 2017-06-14 | 2018-08-28 | 江守军 | 一种肝胆外科手术用撑固装置 |
WO2022176975A1 (ja) * | 2021-02-19 | 2022-08-25 | 国立大学法人千葉大学 | 静脈撮像装置、静脈撮像方法 |
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GB201803402D0 (en) | 2018-04-18 |
US20180279945A1 (en) | 2018-10-04 |
JP2017064094A (ja) | 2017-04-06 |
GB2556796A (en) | 2018-06-06 |
JP6700703B2 (ja) | 2020-05-27 |
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