JP2006102029A - Blood vessel position presenting apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blood vessel position presenting apparatus which simply and speedily carries out operation for confirming a blood vessel suitable for tranfix. <P>SOLUTION: The blood vessel position presenting apparatus comprises a light-emitting element 2, a light-receiving element 3, a marker 8, a driver 9, an amplifier 10, an AD converter 11, a CPU 12, a memory 13, a switch 14, and a touch panel display 15. The CPU 12 stores the history of a reflected light signal from the light-receiving element 3 inputted through the AD converter 11 by a first operation mode. The CPU 12 recognizes a reflected light signal which is not higher than a prescribed threshold among stored reflected light signals as a blood vessel signal showing a blood vessel position by a second operation mode. When an inputted reflected light signal coincides with the selected blood vessel signal among the blood vessel signal recognized by the second mode, the CPU 12 outputs that by a third operation mode. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a blood vessel position presentation device capable of detecting and presenting a blood vessel position of a living body and capable of supporting the insertion of an injection needle or the like into the blood vessel with certainty.

  In order for a doctor or nurse to perform intravenous injection or infusion on the patient's arm or the like, it must first be possible to confirm the exact position of the patient's vein to puncture the injection needle or catheter. The fat layer is relatively thin near the inner arm joint, and veins are relatively easy to check. Therefore, normally, the upper arm is squeezed with a rubber band or the like to stop the blood circulation of the vein, and the vein is inflated with blood pressure to confirm the position more accurately. However, the thicker the fat layer, the more difficult it is to confirm the position of the vein, and there are cases where it cannot be confirmed using the rubber band or the like. In this way, when the position of the vein cannot be confirmed simply by tightening the upper arm with a rubber band, conventionally, a method of warming the arm or searching for the vein with the needle tip has been performed. There was a problem that it caused great pains. Furthermore, when it is performed in the dark, such as a periodic treatment performed on an inpatient at night, further difficulty is accompanied.

  A vein exploration device for avoiding these difficulties has been conventionally proposed (see Patent Documents 1-6).

  In FIG. 17, the structural example of the conventional vein search apparatus described in patent document 1 is shown. The vein exploration device of FIG. 17 is disposed at the center of the distal end portion of the elongated casing 101 so that the light emitting element 102 that emits light in the wavelength range of red or infrared region irradiates the front of the distal end. In addition, a light receiving element 103 that receives a wavelength in the red or infrared region is provided on both sides of the light emitting element 102 at the front end of the housing 101, and the light receiving element 103 has a wavelength to the arm of the light emitting element 102. The light is arranged so that it can efficiently receive only the reflected light from tissues other than the veins. The housing 101 houses a battery 104 for driving power. On the outer peripheral wall of the housing 101, a power operation switch 105 for supplying and controlling the driving power of the battery 104 and a display element 106 for displaying the positional relationship between the device and the vein are arranged. Further, an arrow 107 indicating the center of the apparatus is engraved at the center of the outer peripheral wall of the front end of the housing 101, and a clip 108 is provided for sandwiching the apparatus in a pocket.

  When a doctor or nurse holds this device in his / her hand and puts the tip on the periphery of the patient's arm and traces the arm, the difference in the amount of light received by the two light receiving elements 3 is indicated by the arrow 107 with respect to the vein position. The display element 106 displays the image so as to correspond to the degree of deviation and to correspond to the difference in the amount of received light. The doctor or nurse finely adjusts the position of the tip while viewing the display on the display element 106 so that the difference in the amount of received light becomes zero. The position indicated by the arrow 107 at that time indicates the position where the vein exists.

  Patent Documents 2-6 describe a similar vein exploration device. The vein exploration device of Patent Document 2 is configured to detect the position and direction of a vein by arranging a plurality of sets of two light emitting elements and two light receiving elements. The vein exploration device of Patent Document 3 attaches two arms to an arm, and a cursor incorporating a set of two light-emitting elements and two light-receiving elements can be moved on each arm. Is detected.

  The vein exploration device of Patent Document 4 has a configuration in which a plurality of sets of light emitting elements and two light receiving elements are arranged, and is provided with means for spot illumination on the arm to indicate the vein position on the arm. The vein exploration device of Patent Document 5 has a configuration in which a plurality of pairs of light emitting elements and two light receiving elements are arranged, detects pulsation from the amount of light received by at least one light receiving element, and displays the presence or absence of pulsation. It is. Further, the vein exploration device of Patent Document 6 allows a cursor incorporating a pair of a light emitting element and a light receiving element to be slidable on a bracelet, tightens the arm, slides the cursor on the bracelet, and directly above the vein. When it comes, the LED on the bracelet lights up.

  However, the vein exploration device described in Patent Literature 1-6 hits an injection while the device is in contact with or attached to the arm, and the device itself is difficult to puncture, which makes it difficult for an unspecified number of patients. When used, there is a risk of blood infection and it is unsanitary. It is also difficult to find an optimal vein position and direction that is thicker and more linear. Further, since the device is moved while visually checking the display of the received light amount display means to find the blood vessel position, it is not easy to find a blood vessel suitable for puncture.

  Patent Documents 7 and 8 describe a technique for marking a blood vessel position. The blood vessel position indicating device described in Patent Document 7 detects a sound wave generated when irradiating a blood vessel with intermittent light having a wavelength absorbed by the blood vessel, discriminates the blood vessel, and marks the blood vessel position. . Further, the blood vessel detection device described in Patent Document 8 visually recognizes a blood vessel by visually observing the reflected light of light irradiated on the skin surface, and manually marks the blood vessel position with a marker.

  However, in Patent Documents 7 and 8, as in Patent Documents 1-6, the operator moves the device while visually confirming the sound signal and the image signal to find the blood vessel position. Finding the right blood vessels is not easy.

Japanese Patent Laid-Open No. 2-161956 (page 3, FIGS. 2, 3, 4) Japanese Patent Laid-Open No. 2-172472 (page 4, 3, 4 and 5) JP-A-2-172473 (2nd page, FIGS. 1, 2 and 3) JP-A-2-174852 (page 3, FIGS. 3, 4, 5) Japanese Patent Laid-Open No. 2-174853 (page 4, FIG. 1) Japanese Patent Laid-Open No. 2-174854 (2nd page, FIG. 1) JP-A-60-108043 JP 2003-52699 A

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a blood vessel position presentation device that can easily and quickly perform an operation for confirming a blood vessel suitable for puncture.

  The blood vessel position presentation device of the present invention presents a blood vessel position of a living body, and receives a light emitting means for irradiating the living body with illumination light having a near infrared wavelength, and receives reflected light having a near infrared wavelength from the living body. And a light receiving means for outputting a reflected light signal, a marking means for attaching a mark indicating a blood vessel position on the surface of the living body, and a control section for processing at least the reflected light signal. In the first operation mode, the history of the reflected light signal that is input is stored, and in the second operation mode, the stored reflected light signal that is equal to or less than a predetermined threshold is a blood vessel signal that indicates a blood vessel position. Recognizing and outputting in the third operation mode when the input reflected light signal matches the selected blood vessel signal among the blood vessel signals recognized in the second mode. is there.

  According to the present invention, when the forward scanning is performed on the living body with the blood vessel position presentation device, the first mode is set, the blood vessel position is recognized in the second mode, and the backward scanning is performed on the biological body with the blood vessel position presentation device. By setting to the third mode, it is possible to present a blood vessel position having an appropriate thickness for puncture. Then, in the third mode, the position of the blood vessel to be punctured is assured by operating the marking means when the device is inputting the reflected light signal of the blood vessel portion, that is, indicating that it is the blood vessel position. Can be recognized. Since blood has a characteristic of easily absorbing near-infrared light, when the reflected light signal is equal to or lower than a predetermined threshold value, it can be determined that the light is reflected from the blood vessel portion, and the blood vessel portion and other portions are It can be easily distinguished.

  The blood vessel position presentation device of the present invention includes an operation switch that sets an operation mode, and the control unit recognizes the operation mode based on the number of operations of the operation switch.

  The blood vessel position presentation device according to the present invention includes the controller in which the control unit stores the reflected light signal at regular time intervals in the first mode.

  The blood vessel position presentation device of the present invention includes a roller disposed at a position in contact with a living body, and a rotary encoder that operates in conjunction with rotation of the roller, and the control unit performs the reflected light signal in the first operation mode. Is stored in association with the output of the rotary encoder, and in the third operation mode, the reflected light signal input corresponding to the output of the rotary encoder is the signal of the blood vessel signal recognized in the second mode. A signal indicating that the signal is coincident with the selected blood vessel signal.

  In the blood vessel position presentation device according to the present invention, the roller is located at a position where the movement line when the roller is rotated on the surface of the living body and the irradiation position of the illumination light by the light emitting means at that time do not overlap. Includes what will be placed. According to the present invention, it is possible to rotate the roller while avoiding a position where a blood vessel is detected and injection is performed.

  In the blood vessel position presentation device according to the present invention, the light emitting means includes a plurality of light emitting elements, and the light receiving means includes a plurality of light receiving elements paired with the light emitting elements. According to the present invention, the position of a blood vessel can be detected at a plurality of locations. For example, the direction of the blood vessel is recognized by searching for a point where two or more pairs of elements recognize the blood vessel by rotating the main body. be able to.

  The blood vessel position presentation device of the present invention includes a display unit, and the control unit recognizes one blood vessel for each continuous portion of the blood vessel signal, obtains the number of continuous memories of the blood vessel signal, and recognizes the recognized blood vessel. The detection order and the number of records are displayed on the display unit, and a blood vessel signal corresponding to an externally selected blood vessel signal corresponding to the blood vessel of the detection order displayed on the display unit is selected as the selected blood vessel. Includes signals.

  According to the present invention, since blood absorbs near-infrared light in the blood vessel portion, a blood vessel signal whose reflected light signal is not more than a predetermined value is continuously detected. When the apparatus is scanning the living body surface, the reflected light signal is stored every certain time or every certain distance of movement, so that the number of continuous memories corresponds to the thickness of the blood vessel. In the present invention, since the detected blood vessel is displayed together with its thickness, for example, by selecting the detection order of the thickest blood vessel, it is output that the device has reached that position at the most appropriate blood vessel position. Can do.

  In the blood vessel position presentation device according to the present invention, the control unit recognizes one blood vessel for each continuous portion of the blood vessel signal, obtains the continuous recording number of the blood vessel signal, and calculates the continuous recording number from the recognized blood vessel. A blood vessel signal corresponding to one or a plurality of blood vessels selected as a reference is used as the selected blood vessel signal. According to the present invention, for example, by selecting one or a plurality of blood vessels in order of increasing thickness, it is possible to output that the device has reached that position at the corresponding blood vessel position.

  The blood vessel position presentation device of the present invention includes a non-near infrared light emitting element that irradiates the living body with light having a wavelength that is not absorbed by reduced hemoglobin, and a non-near red light that can detect light having a wavelength emitted by the non-near infrared light emitting element. An external light receiving element is provided, and the control unit controls the amount of near infrared light emitted from the light emitting means based on the intensity of non-near infrared reflected light detected by the non-infrared light receiving element.

  In the blood vessel position presentation device of the present invention, the control unit generates a maximum amplitude that is a difference between a maximum value and a minimum value of the output of the non-near infrared light receiving element in the first operation mode, and the maximum And determining the light emission amount of the near-infrared light so as to take a larger value within a range not exceeding the maximum value that can be output by the amplifier connected to the infrared light-emitting element based on the amplitude.

  The blood vessel position presentation device of the present invention includes a non-near infrared light emitting element that irradiates the living body with light having a wavelength that is not absorbed by reduced hemoglobin, and a non-near red light that can detect light having a wavelength emitted by the non-near infrared light emitting element. An external light receiving element, and the control unit controls the light receiving gain of the near infrared reflected light of the light receiving means based on the intensity of the non near infrared reflected light detected by the non-infrared light receiving element. .

  In the blood vessel position presentation device of the present invention, the control unit generates a maximum amplitude that is a difference between a maximum value and a minimum value of the output of the non-near infrared light receiving element in the first operation mode, and the maximum A blood vessel position presentation device including a product that generates a multiplication value obtained by multiplying an amplitude by a predetermined constant equal to or less than 1, and controls the light reception gain to a value obtained by dividing the maximum value that can be output by the light receiving means by the multiplication value.

  In the blood vessel position presentation device of the present invention, the control unit generates a maximum amplitude that is a difference between a maximum value and a minimum value of the near-infrared reflection signal in the first operation mode, and the maximum amplitude is 1 A multiplication value obtained by multiplying the following predetermined constant is generated, and a value obtained by adding the minimum value to the multiplication value is used as the threshold value.

  The blood vessel position presentation device of the present invention includes a device in which the marking means attaches the mark by a manual operation. According to the present invention, when the control signal is coincident with the selected blood vessel signal, the control device outputs that effect, so that the selected blood vessel position can be marked by operating the marking device at that time. .

  The blood vessel position presentation device according to the present invention includes a driving unit that drives the marking unit, and the control unit recognizes the input reflected light signal in the second mode and the blood vessel in the second mode. When the signal coincides with a selected blood vessel signal, the driving means is driven to attach the mark. According to the present invention, even when the apparatus main body is separated from the living body, since the mark indicating the blood vessel position is attached to the surface of the living body, injection can be performed reliably.

  The blood vessel position presentation device of the present invention includes a device in which the marking means attaches a mark using ink.

  The blood vessel position presentation device of the present invention includes a device in which the marking means applies a mark by ejecting ink.

  The blood vessel position presentation device of the present invention includes a device in which the marking means presses a solid such as resin or metal against the surface of the living body to leave a pressing trace.

  The blood vessel position presentation device of the present invention includes a device in which the marking means attaches a seal to the surface of the living body.

  The blood vessel position presentation device according to the present invention includes a device in which the marking means attaches a seal with a hole to the surface of the living body.

  In the blood vessel position presentation device according to the present invention, the marking means attaches a plurality of marks to the surface of the living body, and the plurality of marks are attached to positions where their gravity center positions become blood vessel positions. Including. According to the present invention, it is possible to reliably recognize the blood vessel position even if the mark is attached while avoiding the blood vessel position.

  The blood vessel position presentation device according to the present invention includes a living body disinfecting member disposed on a surface facing the living body, and the living body disinfecting member includes a hole at least in a transmission part of the illumination light and the reflected light.

  The blood vessel position presentation device of the present invention includes one in which the disinfecting member can be attached to and detached from the facing surface.

  ADVANTAGE OF THE INVENTION According to this invention, the blood vessel position presentation apparatus which can perform operation for confirming the blood vessel suitable for puncture simply and rapidly can be provided.

  Hereinafter, embodiments of a blood vessel position presentation device of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 shows a schematic functional block diagram of an example of a blood vessel position presentation device according to the first embodiment of the present invention. 1 includes a light emitting element 2, a light receiving element 3, a marker 8, a driver 9, an amplifier 10, an AD converter 11, a CPU 12, a memory 13, a switch 14, and a touch panel display 15. The elements are housed in a housing 1 (only a part of which is shown in FIG. 1). However, elements other than the light emitting element 2, the light receiving element 3, and the marker 8 are not necessarily housed in the same housing 1, and may be housed in different housings.

  The light emitting element 2 is a light emitting element that emits near infrared light, such as an infrared light emitting diode or an infrared laser, and irradiates a living body with near infrared light. The light-receiving element 3 is a near-infrared light-receiving element that converts near-infrared light into an electrical signal, for example, an infrared photodiode or an infrared photodetector, and the near-infrared light emitted from the light-emitting element 2 is reflected from the surface of the living body. The reflected light is received. The marker 8 is for attaching a mark indicating the blood vessel position on the surface of the living body. The marker 8 shown in FIG. 1 attaches a mark with ink, and attaches a mark to the surface of a living body by being lowered manually or by a driving means (not shown).

  The light emitting element 2, the light receiving element 3, and the marker 8 are arranged close to one surface of the housing 1, and the marker 8 is arranged above the near infrared light irradiation position of the light emitting element 2. Protrusions 4 are provided around the light emitting element 2, the light receiving element 3, and the marker 8 that are arranged in close proximity, and the protrusions 4 come into contact with the living body surface when scanning the living body surface with the housing 1. And has a function of forming a predetermined gap between the light emitting element 2 and the light receiving element 3.

  The driver 9 controls the light emission output of the light emitting element 2 and keeps the intensity of near infrared light optimal based on the signal from the CPU 12. The amplifier 10 is an amplifier circuit using an operational amplifier or the like for amplifying the output from the light receiving element 3, and the AD converter 11 is an analog for converting the analog signal obtained from the amplifier 10 into a digital signal. / Digital converter.

  The CPU 12 performs processing for controlling the operation of the entire blood vessel position presentation device, and executes a predetermined program stored in a ROM (not shown) or the like. The processing performed by the CPU 12 is an electric signal corresponding to the control processing of the driver 9 for controlling the light emission output of the light emitting element 2 and the intensity of the reflected light obtained from the light receiving element 3 via the AD converter 11. Processing of the reflected light signal is included.

  The memory 13 is used for storing various kinds of information including storage of reflected light signals, and for example, a semiconductor memory is used. The switch 14 is a switch for changing the operation mode of the blood vessel position presentation device. The CPU 12 recognizes the number of times the user has operated, and changes the operation mode. The touch panel display 15 displays various information of the blood vessel position presentation device, and also serves as an operation unit for using the device.

  The CPU 12 recognizes the operation mode according to the operation of the switch 14 and performs processing using the reflected light signal according to the operation mode. In the first operation mode, the history of the reflected light signal input via the AD converter 11 is stored in the memory 13. The history is stored at regular intervals.

  In the second operation mode, based on the stored history, it is determined whether the stored reflected light signal is a reflected light signal from the blood vessel portion, and the reflected light signal from the blood vessel portion is recognized as a blood vessel signal. Although details will be described later, since blood has a characteristic of easily absorbing near-infrared light, the stored reflected light signal below the predetermined threshold is recognized as a blood vessel signal indicating a blood vessel position.

  In the third operation mode, the reflected light signal is input again via the AD converter 11. Then, when it matches the selected blood vessel signal among the blood vessel signals recognized in the second mode, the fact is output. The fact that the apparatus is inputting the reflected light signal of the blood vessel portion indicates that the apparatus is present at the blood vessel position. A mark indicating the blood vessel can be attached to the surface of the living body. At this time, if the blood vessel signal indicating the thickest blood vessel is selected, the position of the blood vessel to be punctured can be reliably recognized.

  This blood vessel position presentation device presents a blood vessel position by reciprocating the surface of a living body to be intravenously injected. FIG. 2 shows how the blood vessel position presentation device is used. As shown in FIG. 2, when an injection is to be made in the vein of the arm 26, the housing 1 is first moved in the direction of arrow 27 to scan the surface of the living body (forward scan), and then in the direction opposite to the arrow 27. It is moved to scan the living body surface (return scan). At this time, during the forward scan, the operation mode is set to the first operation mode, and after the scan is completed, the second operation mode is set. Then, the third operation mode is set during backward scanning.

  FIG. 3 shows an example of a change in the reflected light signal when scanning the arm surface. The graph shown in FIG. 3A shows the change in the reflected light signal when the arm surface having the cross section shown in FIG. 3B is scanned from the left to the right at a constant speed.

  Since blood has the property of absorbing light in the vicinity of a wavelength of 740 to 950 nm, when irradiated with near infrared light, the reflected light signal from the position where the blood vessel exists is from the position where the blood vessel does not exist. It becomes a low value compared with the reflected light signal. Also, when the blood vessel is present at a deep position from the skin surface, the near-infrared light is less likely to reach the blood vessel than when the blood vessel is present at a shallow position, and thus the reflected light signal is high. Therefore, when a threshold value as shown in FIG. 3A is set, the portion below the threshold value can be determined as a reflected light signal from the blood vessel portion, and the width of the portion below the threshold value at that time is thick in the blood vessel. The closer the position of the blood vessel is to the skin, the wider.

  As described above, the blood vessel position suitable for the injection can be presented to the user by judging the blood vessel suitable for the injection based on the width of the portion where the reflected light signal is lower than the threshold and outputting the fact. As described above, since the reflected light signal is stored at regular time intervals (or at regular distances when scanning at a constant speed), reflected light signals (blood vessel signals) lower than the threshold value are continuously stored. It can be determined that the larger the number (the number of consecutive memories) that is made, the blood vessel is suitable for injection.

  Next, an operation for presenting a blood vessel position using the blood vessel position presentation device shown in FIG. 1 will be described. 4 to 7 show schematic operation flows of the blood vessel position presentation device according to the first embodiment.

  When a power switch (not shown) is operated to turn on the power, initialization processing is performed and a standby state is entered. In the initialization process, various software counters, flags, etc., which will be described later, are also reset.

  In step S101, it is determined whether power-off is instructed. If the power is off, the process ends. Whether the power is off is determined at any time. If the power is off, the process ends.

  If the power is not turned off, it is determined in step S102 whether or not the switch 14 for changing the operation mode of the blood vessel position presentation device is pressed, and the standby state is maintained until the switch 14 is pressed.

  When the switch 14 is pressed, it is determined in step S103 whether or not the value of the operation mode counter MC indicating the operation mode is zero. Counter MC = 0 indicates a standby state, and is 0 at initialization. When the switch 14 is pressed from the standby state, the counter MC is set to 1 in step S104 to shift to the first operation mode, the history storing process is performed in step S105, and the history is kept until the switch 14 is further pressed. Repeat the storage process.

  The history storage process in step S105 stores the reflected light signal input from the AD converter 11 in the memory 13 at regular time intervals. When using the blood vessel position presentation device, first, the switch 14 is pressed once to scan the surface of the living body (outward scanning), so that reflected light signals at a plurality of positions on the surface of the living body are stored. The scanning of the living body surface is preferably in a direction that intersects the direction of the blood vessel.

FIG. 5 shows a schematic operation flow of the history storage process. In step S201, the history storage timer RT is reset. The timer RT counts a predetermined clock signal and generates a time interval for storing the reflected light signal. When RT = T ₀ is detected in step S202, the reflected light signal at that time is stored in the memory 13 in step S203. Since this process is repeated until the switch 14 is pressed, the reflected light signal is stored in the memory 13 every predetermined time (or every fixed distance when scanning the surface of the living body at a constant speed). T ₀ is a constant for generating a certain time interval.

  Returning to FIG. 4, since the user presses the switch 14 when the scanning of the living body is completed, the pressing of the switch 14 is detected in step S106, and the process returns to step S103. At this time, since the counter MC is 1, it is determined that MC = 1 in step S107, 2 is set in the counter MC, and the process proceeds to the second operation mode (step S108). In step S109, reflected light signal analysis processing is performed.

  In the reflected light signal analysis processing in step S109, the reflected light signal stored in the memory 13 is recognized as a blood vessel signal indicating a blood vessel position if it is equal to or less than a predetermined threshold value. And it recognizes as one blood vessel for every continuous part of a blood vessel signal, and selects the blood vessel which attaches a mark among the recognized blood vessels manually or automatically.

  FIG. 6 shows a schematic operation flow of the reflected light signal analysis processing. In step S301, the counter AC and the counter BC are initialized, and the blood vessel flag is reset. The counter AC indicates the address of the memory 13 where the reflected light signal stored during the forward scan is stored, and the counter BC indicates the continuous storage number of the blood vessel signal. The blood vessel flag is a flag indicating that the reflected light signal from the blood vessel position is being processed. By the initialization, the counter AC is set to the address at which the reflected light signal was last stored in the first operation mode, and the counter BC is set to 0.

  In step S302, the reflected light signal S (AC) stored at the address indicated by the counter AC is read. In step S303, it is determined whether or not the read reflected light signal S (AC) is smaller than a predetermined threshold value Sth. As described with reference to FIG. 3, when the reflected light signal is small, it can be determined that the reflected light signal is at the blood vessel position, so step S303 determines whether or not the read reflected light signal is a vascular signal. .

If not S (AC) <Sth, it is determined that the signal is not a blood vessel signal, and it is determined in step S308 whether the blood flag is ON. Since the blood flag is off at the beginning of the analysis, the process proceeds to step S306 and the counter AC is counted down. That is, the reflected light signal stored last in the forward path is read sequentially. In step S307, the counter AC of address, first reflected light signal to determine if the start address A ₀ is smaller than the stored in the first operating mode, repeated AC <A ₀ become to S302 and subsequent steps.

If it is determined in step S303 that S (AC) <Sth, the reflected light signal can be recognized as a reflected light signal from the blood vessel portion, so it is determined whether the blood vessel flag is on (step S304) and not on. In this case, a blood vessel flag is set (step S305), and the counter BC is counted up. Then, counts down the counter AC (step S306), and repeats the AC _{<A 0} become to S302 and subsequent steps.

  If the read reflected light signal is no longer a blood vessel signal from the blood vessel signal, it is determined in step S303 that S (AC) <Sth is not satisfied, and it is determined in step S308 that the blood vessel flag is on. In that case, the blood vessel signal group continuously stored so far is recognized as corresponding to one blood vessel, and sequentially stored in the memory 13 together with the value of the counter BC (step S309). At that time, a minimum value or an intermediate value of the blood vessel signal group stored continuously may be stored together. In step S310, the counter BC is initialized, and the process proceeds to step S306.

If the above processing is repeated until AC <A ₀ , the number of blood vessel signals and the minimum value of the reflected light signal are stored for each recognized blood vessel. As described above, the number of blood vessel signals has a certain relationship with the thickness and depth of the blood vessel, and as the number increases, it can be determined that the blood vessel is suitable for injection. Therefore, the number of blood vessel signals is used for the presented blood vessel selection processing in step S311. .

  The presented blood vessel selection process in step S311 is a process for selecting a blood vessel signal to be used in the third operation mode, and the blood vessel signal to be used in the third operation mode is selected manually or automatically.

  When selecting manually, it carries out as follows, for example. The CPU 12 ranks the recognized blood vessels based on the continuous storage number of blood vessel signals for each blood vessel, and displays them on the touch panel display 15 together with the continuous storage number. The user selects a blood vessel to be marked from among the displayed ones by performing a panel touch. This selection result is stored in the memory 13 according to the blood vessel detection order, and is used in the third execution mode.

  When the blood vessel signal is automatically selected, it is selected based on the number of continuous memories for each blood vessel and stored in the memory 13 in the same manner as in the manual selection.

  Returning to FIG. 4, when the reflected light signal analysis process is completed, the process waits for pressing of the switch 14 (step S110), and when the pressing of the switch 14 is detected, the process from step S103 is repeated.

  Since MC = 2 when the reflected light signal analysis processing is performed in the second mode, the process proceeds to S111 through steps S103 and S107, and 3 is set to the counter MC in step S112. In step S113, the blood vessel flag is reset, the counter EC indicating the blood vessel number is reset, and the process proceeds to the third operation mode. The blood vessel flag is a flag indicating that the reflected light signal from the blood vessel position is being processed. The counter EC holds the number of blood vessels detected in the third operation mode, and is used to determine whether the blood vessel is selected in the second operation mode. After the switch 14 is pressed to shift to the third operation mode, the living body surface is scanned in the direction opposite to the direction in the first operation mode (return scan). Then, blood vessel presentation processing is performed (step S114).

  In the blood vessel presentation process in step S114, when the reflected light signal input from the AD converter 11 matches the selected blood vessel signal among the blood vessel signals recognized in the second mode, a message to that effect is output. It is.

  FIG. 7 shows a schematic operation flow of the blood vessel presentation process. In step S401, the history storage timer RT is reset and reset. The timer RT generates a time interval for reading a reflected light signal by counting a predetermined clock signal.

When RT = T ₀ is detected in step S402, the reflected light signal at that time is input in step S403. Note that T ₀ is a constant for generating a fixed time interval and is the same value as the value used in the history storage process of FIG. 5, and is therefore the same as the reflected light signal obtained in the history storage process. Reflected light signals are input at time intervals.

  In step S403, it is determined whether the read reflected light signal is smaller than a predetermined threshold value Sth. If it is smaller than the threshold value Sth, it can be determined that the reflected light signal is a reflected light signal from the blood vessel portion, so it is determined whether or not the blood vessel flag is on (step S405). If it is not on, the blood vessel flag is set (step S406). . In step S407, the counter EC is incremented.

  When the blood vessel flag is on, the blood vessel flag is not set and the counter EC is not counted up. Thus, since the counter EC is counted up only when a reflected light signal smaller than the threshold value Sth is input and the blood vessel flag is set, it indicates the number of blood vessels detected so far.

  Next, in step S408, it is determined whether or not the blood vessel indicated by the counter EC is a blood vessel selected in the second operation mode. If it is determined that the selected blood vessel is selected, the reflected light signal from the selected blood vessel is output in step S409 (presentation output).

  The presentation output in step S409 is performed on the touch panel display 15, for example. When it is displayed on the touch panel display 15 that the device is located on the selected blood vessel, scanning of the living body surface is stopped at that time, and the marker 14 is manually scanned to mark on the selected blood vessel. Can be attached. When the blood vessel position presentation device includes a driving unit that drives the marker 14, the CPU 12 performs a presentation output on the touch panel display 15, and lowers the marker 14 by the driving unit to mark the surface of the living body.

  Note that the period during which the presentation output is performed is arbitrary. For example, the reflected light signal from the selected blood vessel may be output continuously while being input, or may be output only when the reflected light signal from the selected blood vessel is first input. Alternatively, a reflected light signal having a specific size, for example, a reflected light signal having the lowest value or an intermediate value of the blood vessel may be output.

  In addition, the number of blood vessels to be selected in the second operation mode, that is, the number of blood vessels to be presented and output in the third operation mode is arbitrary. For example, by selecting a plurality of blood vessels in order of thickness, a plurality of blood vessels can be marked, and a blood vessel to be injected can be selected flexibly.

  When the presentation output and the blood vessel mark are completed and the switch 14 is pressed, the process returns to step S103 via step S115. At this time, since MC = 3, the process proceeds to step S116 through steps S103, S107, and S111. In step S116, the counter MC is set to 0 to enter a standby state, and waits for power off or pressing of the switch 14.

  As described above, the surface of the living body is scanned by pressing the switch 14 (forward scan), the switch 14 is pressed again after the forward scan is completed, and after the switch 14 is pressed, the direction opposite to the direction of the forward scan is performed. By performing scanning (return scan), the blood vessel position can be presented and the mark can be applied with a simple operation.

  The blood vessel position presentation device in FIG. 1 is a device that lowers the marker 8 manually or by using a driving means, and places a mark on the surface of the living body. Can be used.

  FIG. 8 is a schematic functional block diagram of another example of the blood vessel position presentation device according to the first embodiment of this invention. The blood vessel position presentation apparatus in FIG. 8 is the same as the blood vessel position presentation apparatus in FIG. 1 except that it includes an inkjet head 18 instead of the marker 8, and thus description of other elements is omitted. The inkjet head 18 performs marking by dropping ink on the surface of a living body in response to a command from the CPU 12.

  The user of this apparatus sends a drop instruction from the CPU 12 to the inkjet head 18 by scanning a drop switch (not shown) or automatically when a presentation output is made in the third operation mode, which corresponds to the blood vessel position. Marking can be performed on the surface of a living body.

  FIG. 9 shows an example using another marking means. 9A and 9B are provided with a seal holder 19, and FIG. 9C is provided with a pressure contact marker 22.

  The seal holder 19 shown in FIG. 9A holds the seal 20 for marking on the surface of the living body, and lowers it manually or by a driving means (not shown) to attach the seal 20. The seal holder 19 in FIG. 9B is the same, but holds and sticks the perforated seal 21. When the perforated seal 21 is used, an injection can be performed at the center of the blood vessel position while the seal is stuck.

  The pressure marker 22 shown in FIG. 9C is used to leave a trace by pressing it against a living body surface using, for example, a solid such as resin or metal. When this is pressed and pressed against the surface of the living body for a few seconds, a trace remains on the surface of the living body for a few seconds to several minutes even after the release, so that injection can be reliably made at the blood vessel position.

  The marking means in FIGS. 1, 8, and 9 all attach one mark corresponding to one blood vessel, but a plurality of marks may be attached around one blood vessel.

  FIG. 10 is a schematic functional block diagram of still another example of the blood vessel position presentation device according to the first embodiment of this invention. The blood vessel position presentation apparatus in FIG. 10 is the same as the blood vessel position presentation apparatus in FIG. 1 except that it includes two markers 8, and thus description of other elements is omitted.

  The two markers 8 are arranged at positions where the near infrared light from the light emitting element 2 is irradiated near the middle point thereof. Therefore, when the presentation output is performed in the third operation mode, if the marker 8 is lowered, marks are attached to both sides of the blood vessel position. This mark avoids the blood vessel position, but can reliably recognize the blood vessel position. Therefore, the marking material can be prevented from being mixed into the blood, and the marking material can be selected flexibly.

  Note that the number of markers is not limited to two and may be larger. In that case, the mark positions of the plurality of markers are in the vicinity of the irradiation position of the near infrared light from the light emitting element 2. Further, the marking means is not limited to the marker 8 shown in FIG. 10, but may be an ink jet head that performs ink marking by dropping ink, or may apply a seal.

(Second Embodiment)
FIG. 11 is a schematic functional block diagram of the blood vessel position presentation device according to the second embodiment of this invention. The blood vessel position presentation device in FIG. 11 has the same configuration as the blood vessel position presentation device in FIG. 1, but in addition to the light emitting element 2, the light receiving element 3, and the marker 8, the visible light emitting element 23 and the visible light receiving element. 24 is arranged. The other elements are the same as those in the blood vessel position presentation device in FIG.

  The visible light emitting element 23 is, for example, an LED that emits visible light having a wavelength that does not receive the wavelength absorption of deoxyhemoglobin, and the visible light receiving element 24 is the light emitted from the visible light emitting element 23. It receives reflected light from the surface of a living body, and is, for example, a photodiode in the visible light region. The visible light emitting element 23 is driven by the driver 9, and the electric signal obtained from the visible light receiving element 24 is transmitted to the CPU 12 via the amplifier 10 and the AD converter 11 as in the case of information obtained by near infrared light. Communicated.

  The visible light emitting element 23 and the visible light receiving element 24 are provided in order to correct the fluctuation of the near-infrared reflected light level obtained from the light receiving element 3 due to the use conditions of the apparatus and individual differences between living bodies. Near-infrared reflected light is affected by individual differences in the color of the surface of the living body, contamination on the surface of the living body, and the distance from the surface of the living body. Therefore, the visible light emitting element 23 and the visible light receiving element 24 determine variations in the measurement state. The light emission amount of near infrared light and the light reception gain of near infrared reflected light are corrected. Further, a fixed value is not used as a threshold value for discriminating the blood vessel signal, and the threshold value is set according to the magnitude of the near-infrared reflected light signal in the forward path.

  For example, when the apparatus main body is moved away from the surface of the living body, the reflected light amount of visible light decreases, and when the apparatus main body approaches the skin surface, the reflected light amount of visible light increases. Also, the reflected near infrared light and the reflected visible light have different values depending on the subject between a black person and a white person whose skin color is black. Therefore, until the blood vessel position presentation operation is started and ended, the CPU 12 transmits a light emission command to the visible light emitting element 23 and always monitors the reflected light from the surface of the living body by the visible light receiving element 24.

  Note that the light emission amounts of the light emitting element 2 and the visible light emitting element 23 and the gain of the amplifier 10 to which the light receiving element 3 and the visible light emitting element 23 are connected are as follows. The maximum amplitude obtained from the pair of three and the maximum amplitude obtained from the pair of the visible light emitting element 23 and the visible light receiving element 24 are adjusted in advance.

  Near-infrared reflected light fluctuates due to distance fluctuations from the skin surface or disturbance due to surface conditions. At this time, the output of the amplifier 10 on the near-infrared light receiving element 3 side needs to be within the rated output range of the amplifier 10. As a method for realizing this, there is a method for correcting the gain of the amplifier 10 on the near-infrared light receiving element 3 side, or a method for correcting the light emission quantity of the near-infrared light emitting element 2. In the following, these two methods will be described.

  First, in the former case, the CPU 12 responds to the visible light receiving element 24 when the gain of the amplifier 10 to which the output corresponding to the near-infrared reflected light from the light receiving element 3 is input is scanned in the forward path in the first operation mode. Control based on output. Specifically, a maximum amplitude Y, which is the difference between the maximum output value according to the received light amount of the visible light receiving element 24 and the minimum output value according to the received light amount of the visible light receiving element 24 when the forward scanning is performed, is generated. Then, a multiplication value γY obtained by multiplying the maximum amplitude Y by a predetermined constant γ of 1 or less is generated, and the maximum value Vomax that can be output by the amplifier 10 to which the output of the light receiving element 3 is input is divided by the multiplication value γY. Is the gain of the amplifier 10 to which the output of the light receiving element 3 is input, so that the distance change from the skin surface or the state of the surface is always recognized even in the return path, and the amplifier 10 to which the output of the light receiving element 3 is input outputs. The gain of the amplifier 10 is determined within a range that does not exceed the maximum value Vomax that can be made.

  Next, in the latter case, the CPU 12 controls the amount of light emitted from the near-infrared light emitting element 2 based on the output of the visible light receiving element 24 when the forward scanning is performed in the first operation mode. Specifically, a maximum amplitude Y, which is the difference between the maximum output value according to the received light amount of the visible light receiving element 24 during the forward scan and the minimum output value according to the received light amount of the visible light receiving element 24, is generated. When the maximum value that can be output by the amplifier 10 is Vomax and the amplifier gain is A, the light emission gain B is B = Vomax / (Y / A), and the near-infrared light emission amount before correction is Lb. By setting the light emission amount La of the corrected near-infrared light-emitting element 2 to La = B · Lb, the amplifier 10 connected to the near-infrared light-receiving element 3 does not exceed the maximum value that can be output. The light emission quantity of the light emitting element 2 is determined so as to take a larger value.

  As described above, by controlling the gain of the amplifier 10 and the amount of light emitted from the light emitting element 2 during the backward scanning, it is possible to always recognize the variation in the distance from the biological surface or the state of the surface and perform the optimum measurement.

  When obtaining a threshold value for discriminating a blood vessel signal, first, forward scanning is performed in the first operation mode, and a near-infrared reflected light signal at that time is input. A threshold value is obtained from the maximum amplitude which is the difference between the maximum value and the minimum value of the input reflected light signal. Specifically, a value obtained by multiplying the maximum amplitude by a predetermined constant of 1 or less from the maximum value of the reflected light signal is set as a threshold value. Then, the forward scanning is performed again in the first operation mode, the blood vessel signal recognition operation is performed in the second operation mode, and the backward scanning is performed in the third operation mode.

  Assume that the reflected light signal shown in FIG. 12 is obtained as a result of the forward scanning for determining the threshold value. Assuming that the maximum value of the reflected light signal is Xa and the minimum value is Xb, the newly set threshold value Sb is obtained by Sb = Xa−α (Xa−Xb). Here, α is a constant of 1 or less. Note that Sa in FIG. 12 is an initial threshold value.

  As described above, the blood vessel position presentation device according to the present embodiment is capable of performing an accurate blood vessel position with a simple operation without being affected by individual differences in the color of the living body surface, dirt on the living body surface, and the distance from the living body surface. Can be presented. In addition, in FIG. 11, what provided the marker 8 as a marking means was shown, However, As a marking means, you may utilize what is shown by FIG.8, FIG.9, FIG.10.

(Third embodiment)
FIG. 13 shows a schematic functional block diagram of the blood vessel position presentation device according to the third embodiment of the present invention. The blood vessel position presentation device in FIG. 13 has the same configuration as the blood vessel position presentation device in FIG. 1, but two pairs of light emitting elements 2 and light receiving elements 3 are provided. Further, a marker 8 with a rectangular or elliptical mark is provided. The other elements are the same as those in the blood vessel position presentation device in FIG.

  In the blood vessel position presentation device of FIG. 13, the reflected light signal is stored based on the signal from one of the light receiving elements 3 during the forward scan. Input of the reflected light signal at the time of the backward scanning is performed on the signals from both light receiving elements 3, and when it is detected that one of the blood vessels is selected, the apparatus inputs the reflected light signal of the blood vessel portion. The effect is displayed on the touch panel display 15.

  The CPU 12 constantly monitors the order of the veins specified earlier, and the touch panel is located when one of the detection parts constituted by the two pairs of infrared light sources 2 and light receiving elements 3 is positioned on the specified vein. This is displayed on the display 15 to inform the user.

  Based on the display on the touch panel display 15, the user determines that the position is the selected blood vessel position, and rotates the housing 1 by a minute amount along the living body surface. By rotating the housing 1, both of the two pairs of detection portions can be positioned at the blood vessel position. When this is detected, the fact is displayed on the touch panel display 15 so that the user can recognize this and lower the marker 8 to attach the mark to the surface of the living body.

  At this time, the marker 8 has an elongated shape such as a rectangle or an ellipse, and marking can be performed along the direction of the vein.

  As described above, in the blood vessel position presentation device of the present embodiment, the direction of the blood vessel can be detected by rotating the casing, and a mark indicating the blood vessel direction can be attached. In FIG. 13, the marking means is provided with a marker 8 that descends and marks with ink, but the marking means shown in FIGS. 8, 9, and 10 may be used.

(Fourth embodiment)
FIG. 14 shows a schematic functional block diagram of a blood vessel position presentation device according to the fourth embodiment of the present invention. The blood vessel position presentation device in FIG. 14 has the same configuration as that of the blood vessel position presentation device in FIG. The other elements are the same as those in the blood vessel position presentation device in FIG.

  The seal-like disinfecting sheet 25 is for disinfecting a living body surface to be injected, and is a disinfecting cloth soaked with alcohol or the like. The seal-like disinfecting sheet 25 has holes in the light emitting element 2 and the light receiving element 3 so that near-infrared illumination light and reflected light can be transmitted. Moreover, it attaches to the housing | casing 1 with a seal | sticker so that attachment or detachment is possible.

  Since the disinfecting surface of the seal-like disinfecting sheet 25 is disposed so as to come into contact with the skin surface, the disinfection is automatically performed during the forward scanning and the backward scanning. . In FIG. 14, although two pairs of the light emitting element 2 and the light receiving element 3 are provided, it is not essential to provide a plurality of pairs. Moreover, the visible light emitting element 23 and the visible light receiving element 24 may be arranged in the vicinity of the light emitting element 2, the light receiving element 3, and the marker 8, as in the blood vessel position presentation device shown in FIG.

(Fifth embodiment)
FIG. 15 shows a schematic functional block diagram of an example of a blood vessel position presentation device according to the fifth embodiment of the present invention. The blood vessel position presentation apparatus in FIG. 15 performs input of reflected light signals and storage of history according to the scanning position. Therefore, the rotary encoder 16 that is linked to the roller is disposed at a position where the living body comes into contact, and a counter 17 that counts the output of the rotary encoder 16 is provided. The other elements are basically the same as those in the blood vessel position presentation device in FIG.

  Since the rotary encoder 16 outputs a pulse every predetermined moving distance when the casing 1 moves on the surface of the living body, the moving distance of the casing 1 can be measured. Since the counter 17 counts the output of the rotary encoder 16, the output of the counter 17 indicates the movement distance from the movement start point.

  When the blood vessel position presentation device of FIG. 15 is used, the switch 1 is pressed to enter the first operation mode as in FIG. 1, and the living body surface is scanned (forward scan). Since the value of the counter 17 changes according to the scanning, the reflected light signal is input via the amplifier 10 and the AD converter 11 every time a fixed distance is moved, and stored as a history. At this time, the output of the counter 17 is also stored. Since the scanning position is stored, it is not necessary to scan at a constant speed as in the blood vessel position presentation device of FIG.

  The processing in the second operation mode is the same as that in FIG. 1, and when the blood vessel to be marked is selected, the third operation mode is set and scanning is performed in the opposite direction (return scan). Also at this time, the reflected light signal is input together with the output of the counter 17 every time the fixed distance is moved. When the selected blood vessel position is scanned, a message to that effect is output, so that a mark indicating the blood vessel position can be attached in the same manner as in FIG.

  FIG. 16 shows a schematic functional block diagram of another example of the blood vessel position presentation device according to the fifth embodiment of the present invention. The blood vessel position presentation apparatus in FIG. 16 is the same as the blood vessel position presentation apparatus in FIG. 15 except that a plurality of rotary encoders are provided.

  The roller interlocked with the rotary encoder 16 is arranged at a position where the movement line when the roller is rotated on the surface of the living body and the irradiation position of the illumination light by the light emitting element 2 at that time do not overlap. Therefore, since the roller comes into contact with a position away from the scanning line at the central position where marking should be performed, scanning can be performed without bringing the roller into contact with the place where injection is performed.

  In FIGS. 15 and 16, the marking means is provided with a marker 8 that descends and marks with ink, but the marking means is shown in FIGS. 8, 9, and 10. Also good. As in the blood vessel position presentation device shown in FIG. 11, the visible light emitting element 23 and the visible light receiving element 24 may be arranged in the vicinity of the light emitting element 2, the light receiving element 3, and the marker 8. Further, a seal-like disinfecting sheet 25 may be provided as in the blood vessel position presentation device shown in FIG.

  The blood vessel position presentation device of the present invention is useful as a blood vessel position presentation device that can easily and quickly perform an operation for confirming a blood vessel suitable for puncture.

Schematic functional block diagram of an example of a blood vessel position presentation device according to the first embodiment of the present invention The figure which shows the utilization aspect of the blood vessel position presentation apparatus of the blood vessel position presentation apparatus of the 1st Embodiment of this invention. The figure which shows an example of the change of the reflected light signal when scanning the arm surface using the blood vessel position presentation apparatus of the 1st Embodiment of this invention. The figure which shows schematic operation | movement flow of the blood vessel position presentation apparatus of the 1st Embodiment of this invention. The figure which shows schematic operation | movement flow of the log | history memory | storage process of the blood vessel position presentation apparatus of the 1st Embodiment of this invention. The figure which shows schematic operation | movement flow of the blood vessel presentation process of the blood vessel position presentation apparatus of the 1st Embodiment of this invention. The figure which shows schematic operation | movement flow of the blood vessel presentation process of the blood vessel position presentation apparatus of the 1st Embodiment of this invention. Schematic functional block diagram of another example of the blood vessel position presentation device according to the first embodiment of the present invention The figure which shows another marking means in the blood vessel position presentation apparatus of the 1st Embodiment of this invention Schematic functional block diagram of still another example of the blood vessel position presentation device according to the first embodiment of the present invention. Schematic functional block diagram of a blood vessel position presentation device according to a second embodiment of the present invention The figure explaining the threshold value setting in the blood vessel position presentation apparatus of the 2nd Embodiment of this invention Schematic functional block diagram of a blood vessel position presentation device according to a third embodiment of the present invention Schematic functional block diagram of a blood vessel position presentation device according to a fourth embodiment of the present invention Schematic functional block diagram of an example of a blood vessel position presentation device according to a fifth embodiment of the present invention Schematic functional block diagram of another example of the blood vessel position presentation device of the fifth exemplary embodiment of the present invention The figure which shows an example of the conventional vein search apparatus

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Case 2 Light emitting element 3 Light receiving element 4 Protrusion 8 Marker 9 Driver 10 Amplifier 11 AD converter 12 CPU
13 Memory 14 Switch 15 Touch Panel Display 16 Rotary Encoder 17 Counter 18 Inkjet Head 19 Seal Holder 20 Seal 21 Perforated Seal 22 Pressure Marker 23 Visible Light Emitting Element 24 Visible Light Receiving Element 25 Sealed Disinfecting Sheet 26 Arm 27 Scanning Direction Arrow 28 Arm Cross section 29 Blood vessel cross section 30 Reflected light quantity waveform 101 Case 102 Light emitting element 103 Light receiving element 104 Battery 105 Switch 106 Display element 107 Arrow
108 clips

Claims (23)

A blood vessel position presentation device for presenting a blood vessel position of a living body,
A light emitting means for irradiating the living body with illumination light having a near infrared wavelength;
A light receiving means for receiving reflected light of a near infrared wavelength from the living body and outputting a reflected light signal;
Marking means for attaching a mark indicating a blood vessel position on the surface of the living body;
A control unit for processing at least the reflected light signal,
In the first operation mode, the control unit stores a history of the reflected light signal that is input, and in the second operation mode, the stored reflected light signal is a blood vessel position that is equal to or less than a predetermined threshold value. When the reflected light signal input in the third operation mode matches the selected blood vessel signal among the blood vessel signals recognized in the second mode, the fact is indicated. Is a blood vessel position presentation device. The blood vessel position presentation device according to claim 1,
Has an operation switch to set the operation mode,
The controller is a blood vessel position presentation device that recognizes the operation mode based on the number of operations of the operation switch. The blood vessel position presentation device according to claim 1 or 2,
The blood vessel position presentation device in which the control unit stores the reflected light signal at regular time intervals in the first mode. The blood vessel position presentation device according to claim 1 or 2,
A roller disposed at a position in contact with the living body;
A rotary encoder that interlocks with the rotation of the roller;
The control unit stores the reflected light signal in association with the output of the rotary encoder in the first operation mode, and is input in correspondence with the output of the rotary encoder in the third operation mode. A blood vessel position presentation device that outputs when the reflected light signal matches a selected blood vessel signal among the blood vessel signals recognized in the second mode. The blood vessel position presentation device according to claim 4,
The said roller is a blood vessel position presentation apparatus arrange | positioned in the position where the movement line when rotating the said roller on the surface of the said biological body and the irradiation position of the illumination light by the said light emission means at that time do not overlap. The blood vessel position presentation device according to any one of claims 1 to 5,
The light emitting means includes a plurality of light emitting elements,
The blood vessel position presentation device, wherein the light receiving means includes a plurality of light receiving elements paired with the plurality of light emitting elements. The blood vessel position presentation device according to any one of claims 1 to 6,
With a display,
The control unit recognizes one blood vessel for each continuous portion of the blood vessel signal, obtains the continuous memory number of the blood vessel signal, displays the recognized blood vessel detection order and the number of records on the display unit, and A blood vessel position presentation device that uses, as the selected blood vessel signal, a blood vessel signal corresponding to an externally selected blood vessel signal corresponding to the blood vessels in the detection order displayed on the display unit. The blood vessel position presentation device according to any one of claims 1 to 6,
The control unit recognizes one blood vessel for each continuous portion of the blood vessel signal, obtains the continuous recording number of the blood vessel signal, and selects one or a plurality of blood vessels selected from the recognized blood vessels based on the continuous recording number A blood vessel position presentation device that uses the selected blood vessel signal as a blood vessel signal corresponding to. The blood vessel position presentation device according to any one of claims 1 to 8,
A non-near infrared light emitting element that irradiates the living body with light having a wavelength that is not absorbed by reduced hemoglobin;
With a non-near infrared light receiving element capable of detecting light of a wavelength emitted by the non-near infrared light emitting element,
The blood vessel position presentation device, wherein the control unit controls the amount of near-infrared light emitted from the light-emitting means based on the intensity of non-near-infrared reflected light detected by the non-infrared light receiving element. The blood vessel position presentation device according to claim 9,
The control unit generates a maximum amplitude that is a difference between a maximum value and a minimum value of the output of the non-near infrared light receiving element in the first operation mode, and the infrared light emission based on the maximum amplitude A blood vessel position presentation device that determines a light emission amount of the near-infrared light so as to take a larger value within a range not exceeding a maximum value that can be output by an amplifier connected to the element. The blood vessel position presentation device according to any one of claims 1 to 8,
A non-near infrared light emitting element that irradiates the living body with light having a wavelength that is not absorbed by reduced hemoglobin;
With a non-near infrared light receiving element capable of detecting light of a wavelength emitted by the non-near infrared light emitting element,
The said control part is a blood vessel position presentation apparatus which controls the light reception gain of the near-infrared reflected light of the said light-receiving means based on the intensity | strength of the non-near-infrared reflected light which the said non-infrared light receiving element detected. The blood vessel position presentation device according to claim 11,
The control unit generates a maximum amplitude that is a difference between a maximum value and a minimum value of the output of the non-near infrared light receiving element in the first operation mode, and multiplies the maximum amplitude by a predetermined constant of 1 or less. A blood vessel position presentation device that generates a multiplication value and controls the light reception gain to a value obtained by dividing the maximum value that can be output by the light receiving means by the multiplication value. The blood vessel position presentation device according to any one of claims 9 to 12,
The control unit generates a maximum amplitude that is a difference between a maximum value and a minimum value of the near-infrared reflected signal in the first operation mode, and a multiplication value obtained by multiplying the maximum amplitude by a predetermined constant of 1 or less. The blood vessel position presentation device using the value obtained by adding the minimum value to the multiplication value as the threshold value. The blood vessel position presentation device according to any one of claims 1 to 13,
The blood vessel position presentation device, wherein the marking means attaches the mark by a manual operation. The blood vessel position presentation device according to any one of claims 1 to 13,
Drive means for driving the marking means;
The control unit drives the driving unit when the reflected light signal input in the third mode matches a selected blood vessel signal among the blood vessel signals recognized in the second mode. Then, a blood vessel position presentation device that attaches the mark. The blood vessel position presentation device according to claim 14 or 15,
The blood vessel position presentation device, wherein the marking means attaches a mark using ink. The blood vessel position presentation device according to claim 14 or 15,
The blood vessel position presentation device, wherein the marking means applies a mark by ejecting ink. The blood vessel position presentation device according to claim 14 or 15,
The blood vessel position presentation device, wherein the marking means presses a solid such as resin or metal against the surface of the living body to leave a pressing mark. The blood vessel position presentation device according to claim 14 or 15,
The blood vessel position presentation device, wherein the marking means attaches a seal to the surface of the living body. The blood vessel position presentation device according to claim 19,
The blood vessel position presentation device, wherein the marking means attaches a seal with a hole to the surface of the living body. The blood vessel position presentation device according to any one of claims 14 to 19,
The marking means attaches a plurality of marks to the surface of the living body, and the plurality of marks are attached to a blood vessel position presentation device at a position where their center of gravity is a blood vessel position. The blood vessel position presentation device according to any one of claims 1 to 21,
A biological disinfecting member disposed on the surface facing the living body,
The biological body disinfecting member is a blood vessel position presentation device having a hole in at least a portion where the illumination light and the reflected light are transmitted. The blood vessel position presentation device according to claim 22,
The blood vessel position presentation device, wherein the disinfecting member is detachable from the facing surface.

Images