JP5198945B2 - Vein display device - Google Patents

Description

  The present invention relates to a vein display device that displays a vein of a predetermined part of a donor as an image.

  An injection needle such as an infusion set or a blood collection needle such as a blood bag punctures a donor's vein to inject a drug or collect blood. Usually, these needles puncture a vein at the inner part of the elbow in the donor's arm, but depending on the donor, the position of the vein may be unclear at this part. In such a case, a rubber band is wound around the upper arm and tightened appropriately to raise the vein and grasp its position. However, this operation requires skill in the degree of tightening and is not simple.

  Recently, research and development of vein detection means using near infrared rays has been made, and Patent Document 1 discloses blood vessel detection means including a near infrared laser and a near infrared reflected wave measurement means, and a blood vessel display using a visible light laser. An angiographic projector having means is described.

  In Patent Document 2, an illuminating unit that irradiates illumination light of a specific wavelength, a unit that generates an emphasized image in which information such as a blood vessel position is emphasized based on captured video information, and the obtained enhanced image are projected onto an arm. A biological information presentation apparatus having a projection unit is described.

  In Patent Document 3, the first incandescent lamp is irradiated to the arm through a specific wavelength filter for a light source that transmits light of 890 nm, the second incandescent lamp is directly irradiated to the arm, and then passed through another specific wavelength filter. It is described that the irradiated part is visually observed.

  Patent Document 4 describes that an object is irradiated with an infrared light source and a visible light source and imaged with a near-infrared camera equipped with an infrared transmission filter. The visible light source is for brightly illuminating the object so that the underside of the apparatus is not darkened and does not hinder the procedure, and is considered to irradiate a considerably wide area considerably brightly. In addition, the visible light source is necessary when directly observing the target portion, and is not necessary because it acts as noise when observing an image of a near-infrared camera. Chooses a filter that does not generate infrared light, or uses a filter that does not transmit infrared light.

JP 2004-329786 A JP 2006-102360 A JP 2002-345993 A JP 2004-267534 A

  By the way, when displaying the vein of a living body using near infrared rays, it is unclear which part of the living body is displayed on the monitor on the display device. For example, even if a thick vein suitable for puncture can be recognized on the monitor, the position of the vein may be unclear when attempting to puncture the actual arm, and conversely, it is suitable for puncture. When trying to display the inner elbow portion on the monitor, there is no arm positioning means, and the shifted position may be displayed on the monitor.

  In the devices described in Patent Documents 3 and 4, only visible light is irradiated on a wide range of arms, and cannot be a means for defining the positional relationship.

  The present invention has been made in consideration of such problems, and when a predetermined region of a donor is irradiated with near infrared rays and a vein is displayed by an imaging unit and a display unit, the predetermined region displayed on the display unit An object of the present invention is to provide a vein display device in which the positional relationship with an actual donor's predetermined site is clear.

  The vein display device according to the present invention includes a first irradiating unit that irradiates a predetermined part of a donor with light including a wavelength in the near infrared region, a second irradiating unit that irradiates light including a wavelength in the visible light region, An optical unit that limits an irradiation range of the light irradiated by the second irradiation unit to a predetermined shape within an irradiation range of the light irradiated by the first irradiation unit, and the optical unit of the predetermined part is limited by the optical unit An imaging unit that captures a range including the limited irradiation part of the predetermined shape, an optical filter that is provided between the predetermined part and the imaging unit, and that cuts off a wavelength in a visible light region; and the imaging unit And display means for displaying the picked-up image.

  As described above, the near-infrared light is irradiated onto the predetermined part by the first irradiation unit and the image is picked up by the imaging unit, so that the vein can be displayed and the second irradiation unit is irradiated with the visible light. The imaging position of the part can be visually confirmed, and in particular, since the predetermined shape is irradiated by the optical means, the positioning of the predetermined part is easy. In addition, the positional relationship between the predetermined site displayed on the display means and the actual predetermined site of the donor is clarified.

  Furthermore, since extra visible light is shielded by the optical filter, the imaging means can image the veins clearly.

  When the display means has a reference mark indicating the limited irradiation part or its center, the positional relationship becomes clear. That is, the positional relationship between the predetermined part of the donor and the predetermined part on the display means becomes clear.

  When the light emitted by the second irradiation means includes a wavelength in the near infrared region, a limited irradiation part having a predetermined shape is also displayed on the display means, and the position correspondence with the limited irradiation part of the predetermined part is easy. As can be seen, the positional relationship between the predetermined part of the donor and the predetermined part of the display means becomes clear.

  The first irradiation unit irradiates light including a wavelength of 750 nm to 950 nm, the second irradiation unit irradiates light including a wavelength of 380 nm to 900 nm, and the cutoff wavelength of the optical filter is 740 nm to 800 nm. It is good to be.

  The limited irradiation part may have a spot shape. Thus, by irradiating the light of the second irradiating means in a spot shape, the imaging position can be specified more easily and the position of the predetermined part can be easily aligned.

  A diameter adjusting mechanism that adjusts the diameter of the spot-shaped limited irradiation part may be provided, and the diameter may be adjusted according to the donor and the procedure.

  When the predetermined shape is a cross shape, the position can be easily specified.

  When the predetermined shape is a polygonal shape or a polygonal frame shape, the display range of the display device can be easily grasped.

  When a light amount adjustment mechanism that adjusts the amount of light emitted by each of the first irradiation unit and the second irradiation unit is provided, relative light amount adjustment between the first irradiation unit and the second irradiation unit, and ambient light The amount of light can be adjusted, which is preferable.

  With a distance adjustment mechanism that adjusts the distance between the imaging unit provided with the first irradiation unit, the second irradiation unit, the optical unit, and the imaging unit and the predetermined part, adjustment of an imaging range, focus adjustment, and the like It can be performed.

  According to the vein display device of the present invention, when a predetermined region of the donor is irradiated with infrared rays and the vein is displayed by the imaging unit and the display unit, the predetermined region displayed on the display unit and the predetermined region of the actual donor The positional relationship becomes clear.

  DESCRIPTION OF EMBODIMENTS Hereinafter, a vein display device according to the present invention will be described with reference to FIGS. In the vein display device 10 according to the present embodiment, for example, when blood collection or injection is performed from a donor (including a patient or a subject), a medical worker punctures a needle 13 in a donor's arm (predetermined region) 12. Used for.

  As shown in FIG. 1, the vein display device 10 is provided with an armrest 14 for placing the donor's arm 12, a support column 16 connected to the side end of the armrest 14, and a vertically movable midway of the support column 16. The imaging unit 18 is provided, and a monitor (display means) 20 that is rotatably provided on the upper portion of the support column 16. The arm 12 placed on the armrest 14 may be either a right arm or a left arm. The upper surface of the armrest 14 is made of a moderately soft material so that the arm 12 can be easily placed.

  The armrest 14 has an appropriate length for placing a portion of the arm 12 beyond the elbow 21, and the donor places the arm 12 on the armrest 14 with the palm side facing up. The imaging unit 18 has a horizontal plate shape, and can be moved up and down by operation of a height knob (distance adjustment mechanism) 24 along the guide 22 on the inner surface of the support column 16, and protrudes above the armrest 14. The imaging unit 18 has moderate friction with respect to the guide 22 and can maintain its height without providing a stopper. A recommended reference height is defined for the image pickup unit 18 in relation to the display range on the monitor 20, and can be set to the reference height by matching with a predetermined mark or by an index mechanism. As described above, according to the height knob 24, the adjustment of the imaging range, the focus adjustment, and the like by the near-infrared camera 34 can be performed. Further, according to the height knob 24, a near-infrared camera 34, a lamp 40, and a lens 42, which will be described later, can be moved integrally, which is convenient. In the following description, in order to facilitate understanding, it is assumed that the imaging unit 18 is fixed to a reference height unless otherwise specified.

  By placing the arm 12 on the armrest 14, the position and upper surface height of the arm 12 are substantially defined.

  The monitor 20 is in a liquid crystal format, for example, and is disposed above the imaging unit 18 and has an appropriate range (for example, ± 180 °) as indicated by an arrow A around the rotation shaft 26 protruding from the inner surface of the support column 16. The direction can be adjusted. The rotation range of the monitor 20 is limited by a stopper 26a of the rotation shaft 26 so that the monitor 20 does not rotate excessively. At least when the arm 12 is placed in the direction in which the armrest 14 extends, the direction of the palm ( It can be rotated within a range of 90 ° including the X direction) and the upper direction (Y direction). The rotation shaft 26 is provided at the center of the side surface of the monitor 20 and is well balanced.

  The rotation mechanism of the monitor 20 may be provided with an appropriate angle index mechanism so as to be stable and held at a predetermined angle. The monitor 20 is a horizontal general-purpose product (or a modified product thereof), but in order to display a longer range of the arm 12, a vertical type may be used. A control unit 28 is provided inside the armrest 14 and performs overall control.

  As shown in FIGS. 2 and 3, on the lower surface of the imaging unit 18, a near-infrared camera (imaging means) 34, an infrared filter (optical filter) 36 provided on the front surface of the near-infrared camera 34, and four A near-infrared LED (first irradiation means) 38, a lamp (second irradiation means) 40, and a lens (optical means) 42 provided on the front surface of the lamp 40 are provided. On the side surface in the X direction of the imaging unit 18, there are light amount adjustment knobs (light amount adjustment mechanisms) 44 and 46 for adjusting the amount of light emitted by the near-infrared LED 38 and the lamp 40, and a spot diameter adjustment knob (diameter adjustment mechanism) 48. Is provided.

  The near-infrared LED 38 irradiates near-infrared rays on the surface of the arm 12 opposite to the elbow 21 and on a portion where the needle 13 is punctured and its periphery. Here, near-infrared light is light having a wavelength of 780 nm to 2500 nm, and the near-infrared LED 38 is particularly preferably irradiated with light having a wavelength of 750 nm to 950 nm. The four near-infrared LEDs 38 are provided at equal angular intervals (90 °) with the near-infrared camera 34 as the center, and can irradiate the arm 12 over a wide range and without any deviation. All of the four near-infrared LEDs 38 may be light sources having a single wavelength, or light sources having a plurality of wavelengths may be combined.

  The lamp 40 is, for example, a red LED. The lens 42 irradiates visible light from the lamp 40 in a spot shape with a limited irradiation range on the arm 12 within the irradiation range of the near-infrared LED 38.

  As shown in FIG. 3, the lamp 40 is provided on the back side of the lens 42, basically at a position near the focal length F of the lamp 40, and the light generated by the lamp 40 is gently expanded light through the lens 42. The irradiation is performed on the central portion or the vicinity thereof in the irradiation range of the near-infrared LED 38 in the arm 12 to form a spot irradiation unit (restricted irradiation unit) 100. The spot irradiating unit 100 is limited to a round spot shape by the lens 42, so that the imaging position can be specified more easily and the position of the arm 12 can be easily aligned. The spot irradiation unit 100 is used for specifying the position of the arm 12, and is not for illuminating the arm as in Patent Documents 3 and 4, for example, and needs to be irradiated unnecessarily over a wide range. There is no. The position of the lamp 40 can be appropriately advanced and retracted by an advance / retreat mechanism 50 linked to the spot diameter adjustment knob 48, and the diameter R of the spot irradiation unit 100 can be adjusted according to the donor and the procedure.

  The near-infrared camera 34 continuously captures the portion of the arm 12 that is irradiated with near-infrared rays by the near-infrared LED 38 with the spot irradiation unit 100 as the center. The captured image is supplied and displayed on the monitor 20 via the control unit 28. Depending on design conditions, the captured image may be directly supplied to the monitor 20 without using the control unit 28. Examples of the near-infrared camera 34 include a CCD type or a CMOS type. The near infrared camera 34 may be provided with a zoom function, a sensitivity adjustment function, and the like.

As shown in FIG. 4, the spectrum 60 of the near-infrared LED 38 has a substantially normal distribution shape in the range of 750 nm to 950 nm, most of which is light in the near-infrared region (780 nm to 2500 nm as described above). Spectrum 62 of the lamp 40 is in a substantially normal distribution shape in the range of 600 nm to 800 nm, although the majority are visible region includes light of a portion of the near infrared ray region. Most intensity of wavelength 700nm has high part of the spectrum 62 of the lamp 40 since it is the red region, the spot irradiation unit 100 by the lamp 40 is illuminated in red. Red, because it is light which is adjacent to the near infrared ray region, easily form a continuous spectrum, yet it is suitable for a psychological action to promote the general caution against humans.

  The near-infrared light included in the lamp 40 has a moderate amount of light compared to the near-infrared light of the near-infrared LED 38, and can prevent halation from occurring on the image of the monitor 20.

  The light of the lamp 40 includes light having a wavelength in the visible light region and a wavelength in the infrared region, and may include, for example, a wavelength of 380 nm to 900 nm. The spectra 60 and 62 need not be continuous spectra.

  The infrared filter 36 is an optical filter set so as to cut off (block) light having a wavelength of 760 nm or less (see the broken line 64 in FIG. 4) (that is, the cutoff wavelength is 760 nm), and the light of the near infrared LED 38. Is transmitted almost all of the near-infrared light, but transmits light having a wavelength of 760 nm or more, and blocks most of the visible light.

  The cutoff of the infrared filter 36 is preferably set to a wavelength lower than the maximum wavelength of light irradiated by the lamp 40 (800 nm as shown in FIG. 4) and higher than 740 nm. The infrared filter 36 may be provided between the arm 12 and the near-infrared camera 34. However, the infrared filter 36 may be provided immediately before the near-infrared camera 34 so as not to obstruct the projection of the lamp 40. desirable.

  The lamp 40 and the near-infrared camera 34 are actually arranged at positions that are quite close to each other, and even if the height of the imaging unit 18 changes, the spot irradiation unit 100 by the lamp 40 and the lens 42 and the optical axis of the near-infrared camera 34. It is preferable that the spot irradiation unit 100 includes the optical axis C. Furthermore, it is preferable to set so that the optical axis C is arranged at the center of the spot irradiation unit 100. Thereby, the spot part corresponding | compatible image 102 (refer FIG. 7) corresponding to the spot irradiation part 100 becomes the center of the image of the monitor 20, and is easy to handle. Further, the irradiation direction of the irradiation unit may be automatically adjusted in conjunction with the height of the imaging unit 18. When irradiating the arm 12, considering that the width of the arm 12 is about 100 mm, the diameter R of the spot shape irradiated by the lamp 40 may be adjusted to about 15 mm to 50 mm. The diameter R may be difficult to measure in practice, but may be adjusted to about 15 mm to 50 mm with respect to the arm 12 having a standard height in terms of optical design dimensions.

  The needle 13 is, for example, an injection needle in an infusion set, and an infusion tube is connected to the needle 13. The needle 13 may be a blood collection needle or the like.

  The imaging unit 18 can be used in a state where it is detached from the support column 16. For a child or a patient who cannot move, the imaging unit 18 is used close to the arm 12 of the patient and an appropriate vein 70 is confirmed. (Select). In this case, radio may be used for communication between the imaging unit 18 and the main body.

  By the way, as shown in FIG. 5, many veins 70 exist in the shallow location near the skin. The hemoglobin in the red blood cells flowing in the vein 70 has a large amount of reduced hemoglobin that has lost oxygen. Since reduced hemoglobin has the property of absorbing near-infrared rays, when the near-infrared LED 38 irradiates the arm 12 with near-infrared rays, only the portion where the veins 70 are present is less reflected and becomes darker on the image captured by the near-infrared camera 34. 70 images can be captured. In FIG. 5, a solid line arrow indicates a moderately strong near infrared ray, and a broken line arrow indicates a near infrared ray whose energy is attenuated.

  Next, the operation of the vein display device 10 configured as described above will be described.

  First, as shown in FIG. 6, the near-infrared LED 38 is turned on to irradiate the near-infrared light downward, and the lamp 40 is turned on to form the spot irradiation unit 100 on the armrest 14. Are continuously imaged. The captured image is displayed on the monitor 20 via the control unit 28. When the brightness of the spot irradiation unit 100 in the armrest 14 is not appropriate, the light amount adjustment knob 46 is operated to adjust.

  Then, as shown in FIG. 1, the donor places the arm 12 on the armrest 14 based on instructions from the medical staff. At this time, the position of the arm 12 is determined in accordance with the spot irradiation unit 100 according to the judgment of the medical staff in accordance with the spot irradiation unit 100 at a location that is a guideline to puncture the needle 13 or particularly at a location where the vein position is desired to be confirmed on the monitor 20. Basically, the arm 12 is positioned so that the spot irradiation unit 100 is formed in the inner part of the elbow 21. It will be understood that this positioning is done very easily by visual inspection of the healthcare professional and the donor. If the spot irradiating unit 100 does not exist, it is impossible to know where the arm 12 should be placed on the armrest 14.

  Here, since the near-infrared camera 34 is provided with the infrared filter 36 on the front surface, the visible light is almost shielded and imaged based on light having a wavelength of 760 nm or more, so that the vein 70 (FIG. 7). A clear image is obtained.

  Next, the medical staff confirms the vein position from the image displayed on the monitor 20. At this time, depending on the environment and time zone in which the vein display device 10 is installed, the brightness of the image displayed on the monitor 20 is affected by the sunlight entering through the window glass and the amount of light from the fluorescent lamp. If necessary, the amount of light of the near infrared LED 38 is adjusted. The adjustment of the light amount may be performed manually by visually checking the monitor 20 based on the operation of the light amount adjustment knob 44, or the light amount of the near infrared irradiation region or a portion corresponding thereto may be adjusted by a predetermined sensor. A light amount adjustment mechanism that measures and adjusts the light amount of the near-infrared LED 38 according to the measurement value may be provided to automatically adjust the light amount. The light amount of the lamp 40 may be readjusted according to the adjustment of the light amount of the near infrared LED 38.

  As described above, the light quantity adjustment knobs 44 and 46 are suitable because the relative light quantity adjustment between the near infrared LED 38 and the lamp 40 and the light quantity with respect to the ambient light can be adjusted.

  At this time, since the arm 12 is appropriately positioned based on the spot irradiation unit 100 by visual observation, as shown in FIG. 7, the image displayed on the monitor 20 captures the inner part of the elbow 21 from the beginning. Has been. Therefore, at this time, a positioning operation for moving the arm 12 by trial and error so that the inner part of the elbow 21 is within the image range of the monitor 20 becomes unnecessary.

  By the way, the lamp 40 which is the irradiation source of the spot irradiation unit 100 also includes a certain amount of light having a wavelength of 760 nm or more and passes through the infrared filter 36 and is captured by the near-infrared camera 34. The spot-corresponding image 102 is displayed slightly brighter than the peripheral part (indicated by rough hatching in FIG. 7). The relative position, shape, and size of the spot-corresponding image 102 with respect to the arm 12 on the image of the monitor 20 are naturally equal to those of the spot irradiating unit 100 with respect to the actual arm 12, and the mutual correspondence can be easily grasped. .

  Next, the medical staff selects a vein suitable for puncturing the needle 13 and its puncture location P from the image displayed on the monitor 20. As shown in FIG. 7, it is highly likely that the puncture site P is found in the vicinity of the spot-corresponding image 102 due to the positioning of the arm 12 by the initial spot irradiation unit 100. In FIG. 7, since the puncture location P exists at the right end of the spot corresponding image 102, it can be seen that the actual arm 12 also exists at the right end of the spot irradiation unit 100, and the needle 13 can be easily punctured.

  Further, as shown in FIG. 8A, when the position of the arm 12 is finely adjusted and the puncture site P is set to be the center of the spot-corresponding image 102 in the image of the monitor 20, as shown in FIG. In the arm 12, the needle 13 only needs to be punctured at the center of the spot irradiation unit 100, so that the procedure is further simplified.

  The diameter R of the spot irradiation unit 100 is moderately bright because it is condensed to 15 mm to 50 mm by the lens 42, and is high in visibility because it is moderately large. Moreover, since it is not excessively large, it is easy to specify the positional relationship with the spot corresponding image 102 in the image of the monitor 20.

  As described above, according to the vein display device 10, the near infrared LED 38 irradiates the arm with near infrared rays and takes an image with the near infrared camera 34. By irradiating visible light, the imaging position of the arm can be confirmed visually. In particular, since the lens 42 irradiates the spot shape, the positioning of the arm 12 is easy. Moreover, the positional relationship between the predetermined site displayed on the monitor 20 and the actual predetermined site of the donor is clarified.

  Further, since the lamp 40 irradiates light including a wavelength of 760 nm or more of near-infrared light, the spot portion corresponding image 102 is also displayed on the monitor 20, and the position correspondence with the spot irradiating portion 100 of the arm 12 is easy. I understand. That is, the positional relationship between the actual arm 12 and the arm 12 displayed on the monitor 20 becomes clear. Furthermore, since extra visible light is shielded by the infrared filter 36, the monitor 20 can clearly image the veins.

  The spot irradiation unit 100 is simply formed by the lamp 40 and the lens 42, and it is easy to specify the imaging position based on the spot shape, and the position of the arm 12 is easily adjusted.

  The spot irradiation unit 100 includes a portion corresponding to the center of the display range on the monitor 20, and the arm 12 can be arranged at an appropriate position.

  Since the monitor 20 is basically directed in the direction opposite to the donor (X direction) and in the direction in which the health care worker is present, it is easy for the health care worker to see. Moreover, the monitor 20, the support | pillar 16, and the imaging unit 18 do not block a puncture location, and it is easy for a medical worker to visually recognize. Of course, the monitor 20 may be adjusted upward (Y direction) or the like according to the procedure.

  In the above example, the limited irradiation portion formed by the lamp 40 and the lens 42 has a spot shape, but is not limited to this, and the positional relationship between the arm 12 in the armrest 14 and the image on the monitor 20 by direct visual observation. It may be another predetermined shape that can be confirmed.

  For example, as shown in FIG. 9A, the limited irradiation unit 104 irradiated to the arm 12 may have a cross shape extending vertically and horizontally. In this case, as shown in FIG. 9B, the corresponding image 106 displayed on the monitor 20 also has a cross shape, and it is easy to specify the position more accurately. The crossed portion may be arranged at the center of the display range of the monitor 20. When the arm 12 is finely adjusted on the image of the monitor 20 so that the puncture point P is arranged at the crossing portion of the cross, the actual arm 12 moves the needle 13 over the limit irradiation unit 104 as shown in FIG. 9B. Since it suffices to puncture the part, the procedure is further facilitated. In addition, if the direction of the vein 70 is matched with the vertical line of the cross, the direction of the needle 13 can be easily adjusted to the vein 70. In this case, as shown in FIG. 10, a cross slit (optical means) 72 may be provided between the lamp 40 and the lens 42.

  On the other hand, the limited irradiation part irradiated on the arm 12 may be formed in a square frame shape (polygonal frame shape) matching the display range of the monitor 20. Thereby, it is possible to easily grasp which range in the actual arm 12 is displayed on the monitor 20. In order to clarify the display range on the monitor 20, it is not limited to a rectangular frame shape, but may be a solid rectangular shape (polygonal shape).

  The limited irradiation portion having a predetermined shape by the lamp 40 and the lens 42 may be a combination of two or more selected from the above-mentioned spot shape, cross shape, square frame shape, and the like. In this case, if necessary, a plurality of lamps 40 may be provided to irradiate a limited irradiation unit having a different shape.

  Further, the light emitted by the lamp 40 does not necessarily include light in the near infrared region. In this case, the spot-corresponding image 102 cannot be displayed on the image of the monitor 20 as it is, but is displayed on the monitor 20 because the spot irradiation unit 100 is formed with visible light at least at a predetermined part of the donor. The positional relationship between the predetermined site and the predetermined site of the actual donor is clear.

  In this case, as shown in FIG. 11, when the monitor 20 has a reference mark 120 indicating a position corresponding to the spot irradiation unit 100 or a reference mark 122 indicating the center thereof, a predetermined part of the donor and a predetermined part of the monitor 20 The positional relationship becomes clearer. The reference marks 120 and 122 are colored translucent films provided on the screen of the monitor 20 or images synthesized and displayed by predetermined image processing. The reference marks 120 and 122 may be switchable to a non-display state by a predetermined operation.

  Further, a deflection filter may be installed in front of the near-infrared camera 34 in order to block the reflected light from the donor's skin. Furthermore, the imaging unit 18 may be movable not only in the vertical direction but also in the front-rear direction and the left-right direction. The visible light irradiated by the lamp 40 is not limited to red, and may be purple, blue, green, or the like, and is preferably light including a wavelength of 380 nm to 900 nm. A suitable lens may be provided in the near infrared LED 38.

  The vein display device according to the present invention is not limited to the above-described embodiment, and it is needless to say that various configurations can be adopted without departing from the gist of the present invention.

It is a perspective view of the vein display apparatus which concerns on this Embodiment. It is the perspective view which looked at the imaging unit from diagonally lower. It is a block block diagram of a vein display apparatus. It is a spectrum distribution map of near-infrared LED and a lamp | ramp. It is explanatory drawing which shows the mode of reflection of near infrared rays with respect to a vein, and absorption. It is a perspective view of the vein display apparatus before putting an arm on an armrest. It is an image including an image corresponding to the arm, vein, and spot displayed on the monitor. FIG. 8A is an image when the position of the arm is finely adjusted so that the vein is arranged at the center of the spot-corresponding image, and FIG. 8B shows a state where the needle is punctured into the arm corresponding to FIG. 8A. It is a figure. FIG. 9A is an image of an arm including a cross-shaped limited irradiation unit, and FIG. 9B is a diagram illustrating a state in which a needle is punctured into the arm corresponding to FIG. 9A. It is a figure which shows the arm in which the cross-shaped limited irradiation part was formed, the lamp | ramp for forming this irradiation part, a cross slit, and a lens. It is a perspective view of the vein display apparatus with which the reference mark is displayed on the monitor.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Vein display apparatus 12 ... Arm 13 ... Needle 14 ... Armrest 16 ... Post 18 ... Imaging unit 20 ... Monitor (display means) 34 ... Near-infrared camera (imaging means)
36 ... Near-infrared filter (light filter) 38 ... Near-infrared LED (first irradiation means)
40: Lamp (second irradiation means) 42 ... Lens (optical means)
60, 62 ... Spectrum 70 ... Vein 100 ... Spot irradiation part 102 ... Spot part corresponding image 104 ... Restriction irradiation part 106 ... Corresponding image 120, 122 ... Reference mark

Claims (8)

First irradiation means for irradiating a predetermined region of the donor with light including a wavelength in the near-infrared region;
A second irradiating means for irradiating light including a wavelength of a visible light region of the near infrared region,
Optical means for limiting the irradiation range of the light irradiated by the second irradiation unit to a predetermined shape within the irradiation range of the light irradiated by the first irradiation unit;
In the state where the first irradiating means irradiates the predetermined part with light and the second irradiating part irradiates the predetermined part with light, the predetermined shape restricted by the optical means among the predetermined parts. Imaging means for imaging a range including the irradiation unit;
An optical filter that is provided between the predetermined part and the imaging unit and transmits light having a wavelength in the near infrared region and cuts off light having a wavelength in the visible light region;
Display means for displaying an image captured by the imaging means;
A vein display device characterized by comprising: The vein display device according to claim 1.
The vein display device, wherein the display means has a reference mark indicating the limited irradiation part or its center. The vein display device according to claim 1 .
The first irradiation means irradiates light including a wavelength of 750 nm to 950 nm,
The second irradiation means irradiates light including a wavelength of 380 nm to 900 nm,
The vein display device, wherein a cutoff wavelength of the optical filter is 740 nm to 800 nm. The vein display device according to claim 1.
The vein display device, wherein the limited irradiation unit has a spot shape. The vein display device according to claim 4 .
A vein display device comprising a diameter adjusting mechanism for adjusting a diameter of the spot-shaped limited irradiation part. The vein display device according to any one of claims 1 to 3 ,
The vein display device, wherein the limited irradiation unit has a cross shape. In the vein display device according to any one of claims 1 to 6 ,
A vein display device comprising a light amount adjustment mechanism for adjusting a light amount of light irradiated by each of the first irradiation unit and the second irradiation unit. The vein display device according to any one of claims 1 to 7 ,
A vein display device comprising a distance adjustment mechanism for adjusting a distance between an imaging unit provided with the first irradiation unit, the second irradiation unit, the optical unit, and the imaging unit and the predetermined part.

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