JP4494874B2 - Body fluid collection tool - Google Patents

Description

  The present invention relates to a body fluid collecting tool.

  In recent years, with the increase in the number of diabetic patients, self blood glucose measurement in which patients themselves monitor fluctuations in daily blood glucose levels has been recommended.

  In blood glucose measurement, first, a small wound is made on the skin with a needle, a blade edge or the like, and blood is drawn from the wound. Next, for example, the bleeding blood is supplied to and developed on a test paper (test unit) that develops color according to the amount of glucose in the blood, and the degree of coloration is optically measured (measured). Color) to quantify the blood sugar level (the amount of glucose in the blood).

  The blood glucose measurement (analysis) device is configured such that blood from the skin puncture site by needle puncture reaches (through) the flow path (capillary gap) and reaches the test section. An apparatus is disclosed in Patent Document 1.

  The test section needed to keep the test paper away from the puncture site to some extent due to restrictions on the design of the apparatus (for example, performing measurement accurately). That is, the photometric block including the LED for irradiating the irradiation light and the PD for detecting the reflected light from the test paper requires a certain amount of space, and it is difficult to position the test paper at the end of the measuring device, Further, when the measurement is performed with the test paper positioned at the end of the apparatus, the influence of ambient light entering from the chip insertion port must be taken into consideration, and as a result, the test paper needs to be positioned within the apparatus to some extent. Accordingly, the length of the flow path from the vicinity of the puncture site to the test part is increased.

  By the way, in order to spread the blood to the test paper, it is necessary for the blood to continuously fill the flow path from the inlet of the flow path to the position of the test paper. Therefore, it has been necessary to increase the amount of blood drawn from the puncture site by increasing the length of the flow path. In order to produce a large amount of blood, it is necessary to increase the puncture depth of the puncture site, which increases the pain associated with puncture, which is a burden on the patient.

  Further, when the flow path becomes longer and the amount of blood to be spotted increases, the time required for spotting becomes longer, and air is likely to be caught in the flow path. Entrainment of air hinders the movement of blood to the test paper, making it difficult to perform reliable measurement.

  Although it is possible to reduce the required blood collection volume by reducing the diameter of the flow path, it is difficult to control accuracy in manufacturing. Due to manufacturing variations, it is difficult to keep the volume of the flow path constant, and there has been a limit to improving the suction force by devising the formation of the flow path and the hydrophilic treatment in the flow path.

Japanese Patent Laid-Open No. 2003-153885

  An object of the present invention is to provide a bodily fluid collecting tool capable of accurately measuring a predetermined component of a bodily fluid with a small amount of bodily fluid.

Such an object is achieved by the present inventions (1) to (8) below.
(1) A body fluid collecting tool used together with a body fluid component measuring device,
A puncture needle,
A housing that houses the puncture needle and has a distal end from which the puncture needle exits and a proximal end attached to the measurement device;
An introduction part for introducing a body fluid produced by puncturing the living body surface with the puncture needle; and a detection part for communicating with the introduction part and holding the body fluid and detecting a component in the body fluid A detection unit,
The detection unit is movably provided on the outer surface of the housing, and the detection unit detects the body fluid component at a first position where the body fluid is collected and at a base end side with respect to the first position. A bodily fluid collecting tool that is displaceable between the second position and the second position.

  (2) The bodily fluid collecting tool according to (1), wherein the introduction portion is located at a distal end of the housing at the first position.

  (3) The bodily fluid collecting tool according to (1) or (2), wherein the body fluid collecting tool is provided so as to be rotatable with respect to the housing and includes a holding unit that holds the detection unit.

  (4) The bodily fluid collecting tool according to (1) or (2), further including a holding unit that is provided so as to be movable in a longitudinal direction of the housing with respect to the housing and holds the detection unit.

  (5) The bodily fluid collecting tool according to any one of (1) to (4), further including a first positioning unit that stops the detection unit at the first position.

  (6) The bodily fluid collecting tool according to any one of (1) to (5), further including a second positioning unit that stops the detection unit at the second position.

  (7) The body fluid collecting device according to any one of (1) to (6), wherein the detection unit includes a test paper that reacts with a predetermined component in the body fluid.

  (8) The bodily fluid collecting tool according to any one of (1) to (7), wherein the measuring device can be grasped and operated with one hand and optically measures a bodily fluid component.

  Since the puncture needle and the detection unit (test paper) are integrated in the body fluid collecting device of the present invention, preparation for measurement, disposal of used chips after measurement, and the like are very easy.

  Further, the detection unit of the body fluid collecting tool can be displaced between a position where the body fluid is collected on the distal end side of the housing (first position) and a position where the body fluid on the proximal end side is measured (second position). Therefore, compared with the case where the detection unit is fixed at the second position (side fixed position), the length of the transfer path required to guide the body fluid from the tip to the detection unit is significantly shortened or detected. It is also possible to spot the body fluid directly on the part, so that the amount of body fluid required for the measurement can be reduced.

  Furthermore, by reducing the amount of collected body fluid, the puncture depth by the puncture needle at the puncture site can be reduced, and pain to the patient due to puncture can be reduced.

  In addition, by shortening the body fluid transfer path, the severity of precision control related to the transfer path is reduced in manufacturing.

  Further, even if the amount of liquid to be collected is small, the introduction part is positioned in the immediate vicinity of the tip of the housing that houses the puncture needle, so that it is easy to guide the body fluid generated by the puncture to the introduction part.

Hereinafter, it demonstrates in detail based on suitable embodiment of the bodily fluid collection tool of this invention.
<First Embodiment>
FIG. 1 is a plan view showing a first embodiment of a body fluid sampling device of the present invention, FIGS. 2 to 4 are plan views showing the operation of the holding unit of the body fluid sampling device shown in FIG. 1, and FIG. 1 is a cross-sectional view taken along line AA in FIG. 1, and FIG. 6 is a cross-sectional view taken along line AA in FIG.

  In the following, in FIGS. 1 to 6, the left side is “tip”, the right side is “base end”, and in FIG. 1 to FIG. 4, the back side of the page is “down” or “down” and the front side of the page is “ In FIG. 5, the upper side is described as “upper” or “upper”, and the lower side is described as “lower” or “lower”. 1 to 4, the test paper is omitted.

  The chip (body fluid collecting tool) 1 includes a puncturing means and a component measuring device (blood component measuring device) capable of optically measuring (detecting) a predetermined component in the body fluid collected from the surface of the living body (skin). 100 (see, for example, Japanese Patent Application Laid-Open Nos. 2002-34956 and 2004-97601).

  The part (body fluid collection part) involved in the collection of body fluid on the surface of the living body (skin) is preferably a finger, but in addition, for example, the hand (palm, back of hand, side of hand), arm, thigh, earlobe, etc. It may be.

  Hereinafter, blood will be described as a representative body fluid, glucose as a predetermined component, and a fingertip (finger) as a body fluid collection site (puncture site).

  As shown in FIG. 5, the chip 1 has a housing 3, a puncture needle 5, and a detection unit 7. The chip 1 is inserted into an opening (not shown) provided at the end of the component measuring apparatus 100 from the proximal end side of the chip 1 and a flange 39 is provided in the measuring apparatus 100 (not shown). To be used by being attached to the measuring apparatus 100. Hereinafter, each component will be sequentially described.

  As shown in FIG. 6, the puncture needle 5 includes a needle body 51 and a hub 52 fixed (fixed) to the proximal end portion of the needle body 51.

  The needle body 51 has a sharp needle tip (cutting edge) 511 at its tip. The needle tip 511 punctures the surface (skin) of the fingertip, which is the surface of the living body, and causes blood (body fluid) to be extracted (collected) from the puncture site.

  The needle body 51 may be a hollow needle, but is more preferably a solid needle. Thereby, it can be set as the needle body 51 of a smaller diameter. As a result, the patient's pain can be further reduced when the skin is punctured.

  The needle body 51 is provided with a hub 52 so that the needle tip 511 protrudes. In other words, the hub 52 is provided so as to cover the outer periphery of the needle body 51 on the proximal end side from the needle tip 511.

  The hub 52 includes a cylindrical portion 53 having a substantially cylindrical shape on the distal end side, and a rectangular parallelepiped portion 54 having a substantially rectangular parallelepiped shape on the proximal end side. The outer diameter (diameter) of the cylindrical portion 53 and the height of the rectangular parallelepiped portion 54 are set to be substantially equal.

  A fitting portion 531 having a diameter larger than the outer diameter of the columnar portion 53 is formed at the tip of the columnar portion 53. The fitting portion 531 is fitted to a fitting portion 35 of the housing 3 described later.

  A pair of protrusions 541 are formed at the tip of the rectangular parallelepiped portion 54 so as to protrude laterally. Each protrusion 541 abuts on a step 34 of the housing 3 to be described later.

  Further, at the base end portion of the rectangular parallelepiped portion 54, a connecting portion having a shape corresponding to the shape of the distal end portion (holder portion) of the puncturing means provided in the component measuring device 100 (hereinafter, simply referred to as “measuring device”). 542 is formed. In a state where the chip 1 is loaded in the component measuring device (hereinafter referred to as “chip loaded state”), the connecting portion 542 is fitted (inserted) into the holder portion, whereby the puncture needle 5 is connected to the puncturing means. The

  Such a puncture needle 5 is movably provided (stored) in a lumen 33 of the housing 3 (see FIG. 6). The housing 3 is configured by a substantially rectangular parallelepiped member, and a distal end opening (opening) 31 and a proximal end opening 32 where the lumen portion 33 is opened are formed at the distal end and the proximal end, respectively. The needle body 51 (at least the needle tip 511) provided in the puncture needle 5 passes through the tip opening 31 and exits (projects) from the tip of the housing 3 (chip 1).

  As shown in FIG. 6, the lumen 33 includes a first lumen 331 on the distal end side and a second lumen 332 on the proximal end side.

  The first lumen portion 331 has a substantially cylindrical shape, and is set so that its cross-sectional area is substantially equal to or slightly larger than the cross-sectional area (maximum) of the fitting portion 531 of the hub 52. Further, the second lumen 332 has a substantially rectangular parallelepiped shape, and the cross-sectional area thereof is set to be substantially equal to or slightly larger than the cross-sectional area (maximum) of the rectangular parallelepiped portion 54 (protrusion 541). ing.

  When the puncture needle 5 moves relative to the housing 3, the fitting portion 531 of the hub 52 moves along the inner surface of the first lumen portion 331, and the portion of the protrusion 541 of the hub 52 is the second inner portion. It moves along the inner surface of the cavity 332.

  Thus, when the puncture needle 5 moves relative to the housing 3, the puncture needle 5 is supported at two locations of the fitting portion 531 and the protrusion 541 of the hub 52. In addition, it is possible to prevent the housing 3 from being shaken and to move in the distal direction with high straightness. Thereby, increase of the patient's pain at the time of skin puncture accompanying the blurring of the needle tip 511 of the needle body 51 can be suitably prevented.

  In the housing 3, a step 34 is formed at the boundary between the first lumen 331 and the second lumen 332. For this reason, when the puncture needle 5 moves in the distal direction, the protrusion 541 of the hub 52 contacts the stepped portion 34. Thereby, the movement of the puncture needle 5 is stopped, and the protruding length of the needle tip 511 of the puncture needle 5 from the housing 3 is regulated. Thereby, it is possible to prevent the finger (body fluid collection site) from being punctured more than necessary.

  In addition, a fitting portion 35 having a reduced diameter with respect to the inner diameter of the first lumen portion 331 is formed at the proximal end portion of the first lumen portion 331. The fitting portion 531 of the puncture needle 5 is fitted to the fitting portion 35. Thereby, the puncture needle 5 is fixed to the housing 3 before and after use of the chip 1, that is, before and after puncture of the puncture needle 5.

  In addition, a pair of flanges 39 project from the front end portion of the housing 3 on both side surfaces thereof. Each flange 39 abuts a stopper (not shown) provided in the component measuring apparatus 100 in a state where the chip is loaded. Further, when the chip 1 is removed from the component measuring apparatus 100, if an eject mechanism provided in the component measuring apparatus 100 is operated, the eject pin included therein moves in the distal direction, and the distal end thereof moves to the proximal end portion of the housing 3. The projecting portion (fin) 37 formed to project is pressed in the tip direction. As a result, the chip 1 is removed from the component measuring apparatus 100.

  A detection unit 7 is rotatably installed (displaced) on the front end side of the upper surface of the housing 3. As shown in FIGS. 1 to 4, when the detection unit 7 rotates with respect to the housing 3, the test paper 73 has a first position for collecting blood (see FIG. 1) and the collected blood. Can be displaced to a second position (see FIG. 4) where it is measured. Hereinafter, the state of the detection unit 7 (chip 1) in which the test paper 73 is in the first position is referred to as “first state”, and the state of the detection unit 7 in which the test paper 73 is in the second position is referred to as “second state”. State.

  In the chip 1, the detection unit 7 is normally in the first state, and is in the second state when blood is measured.

  As shown in FIG. 5, the detection unit 7 absorbs and holds blood (body fluid) that has come out of the fingertip by the puncture of the puncture needle 5 (needle tip 511), and glucose (predetermined component) in the absorbed and held blood ) Is detected. The detection unit 7 includes a test paper (detection unit) 73 and a base (holding unit) 76 that holds the test paper 73.

The base 76 includes a main body 72 and a plate-like body (plate piece) 71.
The main body 72 has a substantially long shape. The main body 72 is provided with a recess 724 and a bearing (shaft hole) 726. The recess 724 is formed on the lower surface of the main body 72 along the longitudinal direction of the main body 72. A plate-like body 71 is fixed (fixed) in the recess 724.

  In addition, the bearing 726 is formed so as to penetrate the main body 72 in the vertical direction at a substantially central portion of the main body 72. The bearing 726 is inserted (inserted) with a shaft 40 having an outer diameter substantially equal to the inner diameter and protruding from the upper surface of the housing 3. Accordingly, the detection unit 7 (test paper 73) can be rotated with respect to the housing 3 with a simple configuration.

  As shown in FIG. 1, a test paper placement unit 721 on which the test paper 73 is placed (held) is formed on the upper surface of the main body 72. The test paper setting portion 721 is configured by a concave portion having a substantially circular shape in plan view (a planar shape corresponding to the test paper 73), and a through hole 722 communicating with the concave portion 724 is formed at the center of the bottom surface. Has been.

  As shown in FIG. 5, in a state where the plate-like body 71 is fixed in the recess 724 of the main body 72, blood (body fluid) is formed by a space formed therebetween and a through-hole 722 formed in the main body 72. ) Is transferred to the blood transfer path (body fluid transfer path) 74.

  The blood transfer path 74 has an introduction part (blood inlet) 741 that opens to the tip of the detection unit 7 and a blood outlet 742 that opens to the upper part (above) of the detection unit 7.

  The blood that has come into contact with the blood inlet 741 of the blood transfer path 74 is transferred through the blood transfer path 74 by capillary action, and passes through the blood outlet 742 to the center of the test paper 73 installed in the test paper installation section 721. Supplied. Thereafter, glucose in the blood reacts with the reagent of the test paper 73, and the test paper develops color. The color of the test paper 73 is measured by the photometric block of the measuring apparatus 100, and later converted into a blood glucose level.

  In the first state, the test paper 73 can be located at the first position, that is, the test paper 73 can be located near the puncture site. Thereby, the distance from the blood inlet 741 to the blood outlet 742, that is, the length of the blood transfer path 74 can be shortened. Since blood develops on the test paper 73 only after it is continuously filled with blood from the blood inlet 741 to the blood outlet 742, the blood necessary for filling the test paper 73 through the blood transfer path 74 will be described. The amount can be small.

  Moreover, since the amount of blood to be collected can be reduced, the puncture depth by the puncture needle 5 at the fingertip can be reduced. Thereby, for example, pain to the patient due to puncture of the puncture needle 5 can be reduced (suppressed).

  In the second state, the test paper 73 is located at the second position where the blood component is measured by the measuring apparatus 100. Thereby, glucose in the collected blood can be accurately measured.

  As described above, in the chip 1, the test paper 73 can be displaced between the first position and the second position, so that glucose in the blood can be accurately measured by collecting a small amount of blood. .

  Further, since the position of the test paper 73 measured by the photometric block is the second position on the base end side, the photometric block can be provided in the vicinity of the second position. Therefore, the structure of the distal end portion of the measuring device 100 on the distal end side from the second position can be made thin and flat, and the visibility and operability when the blood is spotted on the chip 1 are improved.

Moreover, according to the chip 1, the amount of blood to be collected can usually be 1 μL or less.
As shown in FIGS. 1 and 4, the second position is closer to the base end side than the first position on the same axis parallel to the longitudinal direction of the housing 3. Thereby, the test paper 73 can be easily positioned at the first position and the second position by rotating the detection unit 7 approximately 180 degrees. Note that the first position and the second position are not limited to being 180 degrees apart.

  Further, in the first state, the side surface 727 of the main body 72 of the detection unit 7 abuts on a protrusion 391 protruding upward from the edge of the flange 39 of the housing 3 (see FIG. 1). Accordingly, the first state of the detection unit 7 is maintained, that is, the test paper 73 is positioned at the first position. Accordingly, since the test paper 73 is accurately positioned at the first position, the blood inlet 741 of the blood transfer path 74 can be positioned closer to the puncture site, and thus the test paper 73 can be placed with a smaller amount of blood. Can be reacted.

  Thus, the side surface 727 of the detection unit 7 and the protrusion 391 that contacts the side surface 727 serve as positioning means (first positioning means) that stops (positions) the test paper 73 at the first position. It has a function.

  In the second state, the defect (notch) 728 formed at the edge of the main body 72 of the detection unit 7 is in contact with the protrusion 36 that protrudes upward from the edge at the center of the upper surface of the housing 3. ) Accordingly, the second state of the detection unit 7 is maintained, that is, the test paper 73 is positioned at the second position. Therefore, when the test paper 73 is accurately positioned at the second position, the measurement of the test paper 73 by the optical block of the measuring apparatus 100 is performed with high accuracy.

  As described above, the defect portion 728 of the detection unit 7 and the protrusion 36 that contacts the defect portion 728 stop the positioning of the test paper 73 at the second position (positioning means) (second positioning means). As a function.

  The plate-like body 71 is formed with a convex portion 743 that projects into the blood transfer path 74. The convex portion 743 is provided in the vicinity of the blood outlet 742. Thereby, the cross-sectional area of the blood transfer path 74 on the blood outlet 742 side can be reduced with respect to the blood inlet 741 side, and blood transfer by capillary action in the blood transfer path 74 can be further promoted.

  The test paper 73 is capable of detecting (reacting) glucose in blood. For example, the test paper 73 is formed by supporting (impregnating) a reagent (coloring reagent) on a carrier (absorber) capable of absorbing blood. . As a result, the test paper 73 can be produced with a simple configuration, and the test paper 73 can be easily installed in the detection unit 7.

  The carrier is preferably composed of a porous membrane. In this case, the porous membrane preferably has a pore size that can filter out red blood cells in blood.

  Examples of the carrier constituting the test paper 73 include, in addition to the porous membrane, a sheet-like porous substrate such as a nonwoven fabric, a woven fabric, and a stretched sheet.

  Examples of the constituent material of the carrier such as a porous membrane include polyesters, polyamides, polyolefins, polysulfones, and celluloses, but impregnate an aqueous solution in which a reagent is dissolved, or filter blood cells when collecting blood. Therefore, a hydrophilic material or a material that has been subjected to a hydrophilic treatment is preferable.

  Further, the carrier of the test paper 73 may be composed of a single layer sheet or a multilayer structure in which a plurality of sheets are laminated.

  Examples of the reagent impregnating the carrier (porous membrane) include glucose oxidase (GOD), peroxidase (POD), 4-aminoantipyrine, N-ethyl N- (2-hydroxy-3) in the case of blood glucose measurement. -Sulfopropyl) -m-Toluidine-like color former (coloring reagent), etc. In addition, depending on the measurement component, for example, ascorbate oxidase, alcohol oxidase, alcohol dehydrogenase, galactose oxidase, fructose dehydrogenase, cholesterol oxidase, Examples include enzymes that react with blood components (predetermined components) such as cholesterol dehydrogenase, lactate oxidase, lactate dehydrogenase, bilirubin oxidase, and xanthine oxidase, and color formers (coloring reagents) similar to those described above.Further, a buffering agent such as a phosphate buffer may be included. Needless to say, the types and components of the reagents are not limited to these.

Next, a method for using glucose in blood using the chip 1 will be described.
First, the tip 1 is inserted into an opening (not shown) provided at the end of the component measuring device 100 from the proximal end side of the tip 1, and a flange 39 is provided in the measuring device 100 with a stopper ( It is mounted by abutting against (not shown). At that time, the connecting portion 542 is fitted to the distal end portion (holder portion) of the puncture means provided in the measuring apparatus 100, and the puncture needle 5 is connected to the puncture means.

  Next, the skin at the puncture site is applied to the tip opening 31 of the chip 1, and the puncture means is operated to puncture the skin. Once the skin is removed from the chip 1, the periphery of the puncture site is pressed with a finger and blood is drawn out. The blood is spotted on the introduction part (blood inlet) 741 of the chip 1, and the blood is spread on the test paper 73.

Next, the detection unit 7 is rotated, and the test paper 73 is moved to the measurement position (second position) on the base end side. The degree of color development caused by the reaction between the reagent contained in the test paper 73 and glucose is measured by an optical block provided in the measurement apparatus 100 and converted into a glucose value by a calculation unit provided in the measurement apparatus 100.
After the measurement is completed, the chip 1 is detached from the measuring apparatus 100 and discarded.

<Second Embodiment>
Next, a second embodiment of the body fluid collecting device of the present invention will be described.

  7 is a plan view showing a second embodiment of the bodily fluid collecting tool of the present invention, FIG. 8 is a plan view showing the operation of the holding part of the bodily fluid collecting tool shown in FIG. 7, and FIG. FIG.

  In the following, in FIGS. 7 and 8, the left side is “tip”, the right side is “base end”, the upper side in FIG. 9 is “up” or “upper”, and the lower side is “lower” or “lower”. Will be described. 7 and 8, the test paper is omitted.

  Hereinafter, the chip of the second embodiment will be described focusing on the differences from the chip of the first embodiment, and the description of the same matters will be omitted.

  The chip of the second embodiment is different from the chip of the first embodiment except for the configuration of the detection unit.

  In the chip 1A of the present embodiment, the detection unit 7A is provided so as to be movable in the longitudinal direction of the housing 3 with respect to the housing 3.

  As shown in FIG. 7 and FIG. 8, two plate-like (long-like) rails 75 are formed on the side surface 727 of the detection unit 7 </ b> A (main body 72) along the longitudinal direction.

  A claw portion (clamping portion) 41 that clamps each rail 75 is formed at the center of the upper surface of the housing 3.

  Further, a protruding portion 38 protruding upward is formed at the top end portion of the upper surface of the housing 3. The tip of each protrusion 38 is engaged with a protrusion 77 formed to protrude from the tip of the rail 75 of the detection unit 7A toward the side (vertical direction in FIG. 7). By this engagement, the detection unit 7A can be stopped at the first position. When the detection unit 7A moves, the projecting portion 77 spreads (presses) the projecting portion 38 to the side and releases the engagement.

  Since the rail 75 is guided by the claw portion 41, the detection unit 7A (test paper 73) smoothly moves between the first position (see FIG. 7) and the second position (see FIG. 8). be able to. This also enables accurate positioning at the second position.

  In addition, when the detection unit 7A of the first embodiment rotates, the detection unit 7A moves in the longitudinal direction of the housing 3, so that a rotating space (dead space) of the rotating detection unit 7 is generated. Is prevented.

  As shown in FIG. 7, at the first position, the claw portion 41 abuts against a wall surface 751 formed at the end portion on the proximal end side of the rail 75. As a result, the detection unit 7A is positioned at the first position. Further, the detection unit 7A is fixed at the first position by the engagement between the protrusion 38 and the protrusion 77 described above.

  As described above, in the chip 1A, the claw portion 41 and the wall surface 751 in contact with the claw portion 41 serve as positioning means (first positioning means) that stops (positions) the detection unit 7A at the first position. It has the function of

  In addition, as shown in FIG. 8, at the second position, the claw portion 41 abuts against the wall surface 752 of the protrusion 77 formed at the end portion on the tip end side of the rail 75. As a result, the detection unit 7A is positioned at the second position.

  As described above, in the chip 1A, the claw portion 41 and the wall surface 752 in contact with the claw portion 41 serve as positioning means (second positioning means) that stops (positions) the detection unit 7A at the second position. It has the function of

  Further, since the claw portion 41 and the housing 3 sandwich the rail 75 in the vertical direction, the movement of the detection unit 7A in the vertical direction is restricted (prevented) (see FIG. 9). As a result, the detection unit 7 </ b> A can smoothly (stablely) move in the longitudinal direction of the housing 3.

  As shown in FIG. 9, the claw portion 41 is in contact with the side surface 727 of the main body 72. Accordingly, the detection unit 7A is supported from both sides (left and right direction in FIG. 9), and the detection unit 7A can move smoothly (stably).

  The chip 1A preferably has a biasing means that biases the detection unit 7A toward the tip side. Thereby, when blood is collected, the detection unit 7A can be surely positioned at the first position.

  Further, when the chip 1A has the urging means, the detection unit 7A is preferably configured to be locked to the housing 3 at the second position. This prevents the detection unit 7A from unintentionally moving to the tip side (to the first position).

  Moreover, although the movement distance of 7 A of detection units is not specifically limited, For example, it is preferable that it is 2-30 mm, and it is more preferable that it is 5-15 mm.

  As mentioned above, although the bodily fluid collection tool of this invention was demonstrated based on each embodiment of illustration, this invention is not limited to these, The structure of each part is arbitrary structures which can exhibit the same function. Can be substituted.

  Further, in each of the above embodiments, the displacement operation of the detection unit is performed manually or automatically, and the driving method is not particularly limited.

  In each of the above embodiments, blood has been described as a representative body fluid to be collected. However, in the present invention, the body fluid to be collected is not limited to this, and is, for example, sweat, lymph fluid, interstitial fluid, spinal fluid, or the like. May be.

  In each of the above embodiments, glucose is representatively described as a measurement target component (predetermined component). However, the measurement target component is not limited thereto, and examples thereof include proteins, cholesterol, uric acid, creatinine, and glycated hemoglobin. Further, organic compounds such as ketone bodies, bilirubin, hormones and alcohols, inorganic ions such as ammonia, sodium, potassium, calcium, chlorine, phosphoric acid, carbonic acid and pH may be used.

It is a top view which shows 1st Embodiment of the bodily fluid collection tool of this invention. It is a top view which shows operation | movement of the holding | maintenance part of the bodily fluid collection tool shown in FIG. It is a top view which shows operation | movement of the holding | maintenance part of the bodily fluid collection tool shown in FIG. It is a top view which shows operation | movement of the holding | maintenance part of the bodily fluid collection tool shown in FIG. It is the sectional view on the AA line in FIG. It is the sectional view on the AA line in FIG. It is a top view which shows 2nd Embodiment of the bodily fluid collection tool of this invention. It is a top view which shows operation | movement of the holding | maintenance part of the bodily fluid collection tool shown in FIG. It is the sectional view on the AA line in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1A chip | tip 3 housing 31 front end opening 32 base end opening 33 lumen | bore part 331 1st lumen | bore part 332 2nd lumen | bore part 34 level | step-difference part 35 fitting part 36 protrusion part 37 protrusion part 38 protrusion part 39 flange 391 protrusion part 40 shaft 41 claw part 5 puncture needle 51 needle body 511 needle tip 52 hub 53 columnar part 531 fitting part 54 rectangular parallelepiped part 541 projecting part 542 connecting part 7, 7A detection unit 71 plate-like body 72 main body 721 test paper installation part 722 Through hole 724 Concave portion 726 Bearing 727 Side surface 728 Defect portion 73 Test paper 74 Blood transfer path 741 Introduction portion (blood inlet)
742 Blood outlet 743 Projection 75 Rail 751, 752 Wall surface 76 Base 77 Projection 100 Component measuring device

Claims (8)

A bodily fluid collecting tool used together with a bodily fluid component measuring device,
A puncture needle,
A housing that houses the puncture needle and has a distal end from which the puncture needle exits and a proximal end attached to the measurement device;
An introduction part for introducing a body fluid produced by puncturing the living body surface with the puncture needle; and a detection part for communicating with the introduction part and holding the body fluid and detecting a component in the body fluid A detection unit,
The detection unit is movably provided on an outer surface of the housing, and the detection unit detects the body fluid component at a first position where the body fluid is collected and at a base end side with respect to the first position. A bodily fluid collecting tool that is displaceable between the second position and the second position.   The bodily fluid collecting tool according to claim 1, wherein the introduction portion is located at a distal end of the housing at the first position.   The bodily fluid collecting tool according to claim 1, further comprising a holding portion that is rotatably provided with respect to the housing and holds the detection portion.   The bodily fluid collecting tool according to claim 1, further comprising a holding portion that is provided so as to be movable in a longitudinal direction of the housing with respect to the housing and holds the detection portion.   The bodily fluid collecting tool according to any one of claims 1 to 4, further comprising first positioning means for stopping the detection unit at the first position.   The bodily fluid collecting tool according to any one of claims 1 to 5, further comprising second positioning means for stopping the detection unit at the second position.   The body fluid collecting tool according to any one of claims 1 to 6, wherein the detection unit includes a test paper that reacts with a predetermined component in the body fluid. The bodily fluid collecting tool according to any one of claims 1 to 7, wherein the measuring device can be grasped and operated with one hand and optically measures a bodily fluid component.

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