JP2002345953A - Vein detector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely and stably insert an injection needle by enabling an operator to easily recognize the part or form of a vein. SOLUTION: Light from a light source (1) with a specified wavelength is transmitted through a specified wavelength filter (2) for the light source and radiated on the spot, where a vein part (6) seems to exit, for example, on an upper arm part (5) together with light (3) from a light source for reference and the reflected light is visually observed through a specified wavelength filter (4). The latter filter (4) is held by a holding part (7).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for detecting the position, shape and condition of a subcutaneous vein of a human body.

[0002]

2. Description of the Related Art Conventionally, when a needle is punctured into a human vein for the purpose of injection or blood collection, a practitioner visually searches for a vein position. However, in a site such as the subcutaneous region of the upper arm, veins of a shape, thickness, or state suitable for this purpose may not be clearly visible because they are not clearly exposed.
In this case, the upper arm is tightened with a rubber band or the like to temporarily congest the blood, or inserted into a suction device to lift the veins.

[0003]

The prior art described above is
The practitioner requires a high level of experience and skill, and the subject, such as a patient, often gives pain and anxiety, and failures may cause actual harm such as subcutaneous hemorrhage. In addition, there is another problem that it is not enough to simply find the vein portion, and several trials are required to find a vein site in a good condition for puncturing the injection needle. According to the present invention, in such a case, the practitioner can easily identify and grasp the appropriate vein site, shape, or state, and can reliably and stably puncture the injection needle, thereby solving the above-described problem.

[0004]

The present invention mainly comprises a light source having a specific wavelength, a visible light source for reference which emits light having a wavelength other than the specific wavelength, and a filter which selectively transmits light having a specific wavelength.

[0005]

With this configuration, the specific wavelength light source and the reference visible light source are projected onto a site where the existence of the subcutaneous vein of the subject to be punctured with the injection needle can be estimated or almost recognized, and the vicinity thereof, The reflected light is visually observed through a filter that transmits the specific wavelength light. At this time, the specific wavelength is approximately 890 nm corresponding to the light absorption spectrum of venous blood. As a result, light near the above-mentioned wavelength in the light source projected on the subcutaneous vein is absorbed more than light of other wavelengths and the reflection amount When this is viewed through the filter, the site of the subcutaneous vein becomes darker. At this time, by appropriately selecting and adjusting the transmission performance of the filter and the intensities of the specific wavelength light source and the reference visible light source, the relative position of the vein in the body of the target subject can be visually identified.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment shown in FIG. In the figure, (1) is a light source for a specific wavelength, (2)
Indicates a specific wavelength filter for the light source, (3) indicates a reference light source, and (4) indicates a specific wavelength filter. For convenience of explanation, (5) shows a vein in the upper arm (6) of the human body, and (7) shows a filter holder.

As an example, a light source for a specific wavelength (1) using an incandescent lamp containing this wavelength light and selectively transmitting the light having a specific wavelength of 890 nanometers through a filter of (2) selectively and well. When another incandescent lamp and a filter (4) having a considerably high transmission efficiency of the specific wavelength are used as the reference light source (3), the light generated from the specific wavelength light source (1) is filtered by the filter (2) at the specific wavelength. Only the light is selectively transmitted and projected on the upper arm (6). At this time, when the reflected light is visually observed through a specific wavelength filter, the vein (6) on the upper arm portion substantially absorbs the specific wavelength, so that the reflectance is lower than that of other parts, and the vein (6) looks darker. Here, when the reference light source (3) is also projected on the upper arm, the filter (4) also transmits a small amount of this light, and the relative position of the darkly visible vein in the upper arm can be identified. For this purpose, it is necessary to adjust the performance characteristics of the components (1) to (4). In particular, the relative intensity of the illuminance of both light sources (1) and (3) may be appropriately adjusted (the device is not shown) according to the state of the target. Note that the mutual characteristics of both filters (2) and (4) also affect the discrimination performance, and are adjusted in advance. The above component (1),
(2), (3), (4) and (7) may be collectively installed as one device on a gantry (not shown), or may be appropriately divided and installed so as to operate while cooperating as a system. . When the present apparatus is used simply for a specific purpose, the two light sources (1) and (3) can be combined into one. The filter holding section (7) is provided for the convenience of the operator's observation, and is provided for holding the filter and using it like glasses or holding it by hand.

FIG. 1 is a conceptual diagram of the configuration of the present apparatus.

[0009]

As described above, according to the vein detection device of the present invention, when puncturing a human vein with a syringe needle, the vein site can be easily visually observed without a high level of experience or skill compared with the conventional method. Be able to identify. For this reason, for example, it is possible to reliably visually determine the position of the upper arm and the shape of the vein in which position, and it is possible to specify the optimal part. At the same time, the practitioner can continue the observation even during the puncturing operation, so that the safety and reliability are greatly improved. The operation can be relieved mentally, and the patient can be relieved of tension and pain, and smooth medical treatment can be promoted. In addition,
At this time, it is expected that the state of the vein (hardness, aging, etc.) can be estimated to some extent depending on the shape of the observed vein, and this can also be useful for a method of judging the type of injection needle and the puncture suitability.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of a vein detection device according to the present invention.

[Explanation of symbols]

 (1) Specific wavelength light source (2) Light source specific wavelength filter (3) Reference light source (4) Specific wavelength filter (5) Upper arm (6) Vein (7) Filter holding unit 4 illustrates an optical path.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yuriko Terada 7-6-203, Ikagakita-cho, Hirakata-shi, Osaka F-term (reference) 2G059 AA05 BB12 BB14 CC16 EE01 EE02 FF08 GG10 HH01 HH06 JJ02 KK07 4C066 AA07 BB01 CC01 DD08 FF04 FF05 HH11 LL30

Claims (1)

[Claims] 1. A vein detection device comprising: a light source for projecting light of a specific wavelength and reference light having other wavelengths together; and a filter for selectively transmitting the specific wavelength.