JP2009195436A - Test implement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a test implement which carries out a test easily by sucking a body liquid and prevents the body liquid sucked into the implement from leaking to the outside. <P>SOLUTION: A body liquid test implement is provided which carries out the test of a body liquid by sucking the body liquid into the test implement and making the body liquid contact with an indicator within the implement. The body liquid test implement comprises a suction part used as a suction port to suck the body liquid into the test implement, an indicator sealing part containing the indicator, a communication opening and closing means for opening and closing communication between the inside of the indicator sealing part and the inside of a main unit of the test implement, and a suction means connecting part for connecting the test implement to a body liquid suction means. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to an inspection instrument that performs various inspections by sucking body fluid. More specifically, the present invention relates to a body fluid testing device suitable for testing body fluid collected from a catheter or tube inserted into the body.

  In particular, there are many opportunities to collect and examine body fluids such as gastric juice, blood, pancreatic juice, and urine in the medical field. At that time, the body fluid once collected is transferred to another container, where a test paper or a test reagent (hereinafter referred to as an indicator) is brought into contact with the body fluid to observe the reaction. However, this method requires time and labor for article preparation and inspection procedures. In addition, there are problems such as that the person who conducts the inspection touches the collected body fluid, and the body fluid may be spilled on the desk or floor to contaminate the surroundings.

  In addition, body fluid is collected using a catheter or tube, and the collected liquid is inspected. However, in this case as well, there are problems such as taking time and effort for preparation and inspection. An example of performing such a test is to check the tip position of a feeding tube inserted into the body.

As a method of administering nutrition to a patient who is difficult to take nutrients by mouth, a method of inserting a tube into the stomach through the nasal cavity and administering the nutrition through the nasal nutrition tube is performed. When this tube is inserted, there is a risk that the tip of the catheter that should originally reach the stomach is erroneously inserted into a respiratory organ such as the trachea or lung. When a nutrient is administered to a patient in this state, abnormalities such as pneumonia and suffocation are caused. In the worst case, the patient's life is affected. For this reason, the medical staff recommends confirming that the tip position is in the stomach when administering nutrition through a nasal feeding tube (see non-patent literature). As a confirmation method, body fluid is sucked through a catheter, and the pH of the sucked body fluid is confirmed to be acidic using an indicator that changes color depending on the hydrogen ion concentration (hereinafter also referred to as pH). This method is a reliable and effective method for confirming that the body fluid is the stomach contents. However, even with this method, there are problems such as time-consuming preparation of articles and procedures for inspection, touching the collected body fluid by the inspector, and spilling body fluid on the desk or floor to contaminate the surroundings.

  A system for confirming the position of the tip of the nasal feeding tube is disclosed in Patent Document 1. According to this content, since the body fluid suction operation and the suctioned body fluid can be confirmed at the same time, it is possible to solve the problem that the preparation of the article and the procedure of the inspection are troublesome. However, there is no mechanism for retaining the aspirated body fluid in the inspection device, and when the inspection device is removed from the catheter after the body fluid has been aspirated, the body fluid in the inspection device may leak out. Therefore, there is a problem that the body fluid may be spilled on the desk or the floor, and the problem that the person who performs the inspection touches the body fluid has not been solved. In particular, when the body fluid and the indicator are brought into contact with each other, the indicator dye mixes with the body fluid, and if the body fluid leaks to the outside, the pigment may also leak together and contaminate the desk, the floor, or the examiner. A method of attaching a check valve to the inspection instrument is also conceivable, but in that case, the configuration of the inspection instrument becomes complicated and the cost is increased, which is not preferable.

Moreover, the instrument described in Patent Document 2 is used as an instrument for collecting and examining body fluids. The instrument described in Patent Document 2 is composed of a stick provided with a determination portion at the tip and a container for storing the stick. The sample is collected with the stick, and the indicator and the sample in the container are stored by placing the stick in the container. Can contact and cause a reaction to determine the specimen. However, when confirming the position of the catheter inserted into the body using this device, the sucked body fluid must be transferred to another container, and then the stick and body fluid must be brought into contact with each other. The problem has not been solved.

International Publication WO2006 / 003960 Specification JP-A-7-63750 specification Published by Japan Nursing Association in 2002, “Medical and Nursing Safety Management Information No. 8”

The present invention has been made to solve the above problems. That is, the present invention provides an inspection instrument that can be inspected by simply sucking body fluid and that can prevent the body fluid sucked into the instrument from leaking outside.

In order to solve the above problems, the present invention has the following configuration. That is, the present invention relates to an inhalation that serves as an inhalation port for body fluid into the inspection instrument in the body fluid inspection instrument in which body fluid is inhaled into the inspection instrument and the indicator and body fluid in the instrument are brought into contact with each other to inspect the body fluid , An indicator enclosure containing the indicator, a communication opening / closing means for opening / closing communication between the indicator enclosure and the inspection instrument main body, and a suction means connection section for connecting the inspection instrument to the body fluid suction means A body fluid testing device is provided. Preferably, the body fluid testing instrument body is configured by an inner cylinder and an outer cylinder that are rotatably inserted, and an indicator enclosure is provided on the side of the outer cylinder so as to communicate with the inside of the outer cylinder. An opening is provided at the side of the inner cylinder that matches the position of the inner cylinder, and the communication between the indicator enclosure and the body fluid testing instrument body is opened and closed by controlling the rotational position of the inner cylinder and the outer cylinder, thereby providing a communication opening / closing means. It is a body fluid testing device.

With such a configuration, the body fluid sucked simultaneously with the body fluid suction operation can be brought into contact with the indicator, and the body fluid can be easily inspected. In addition, after the body fluid is sucked into the inspection instrument, the communication between the indicator enclosure and the inspection instrument body is blocked by the communication opening / closing means, so that the body fluid flowing into the indicator enclosure leaks out of the inspection instrument. Can be prevented.

In the case where the body fluid testing instrument body is composed of an inner cylinder and an outer cylinder that are rotatably inserted, it is desirable to provide a rotational position recognition means for the inner cylinder and the outer cylinder. With such a configuration, it is possible to easily determine whether or not the indicator enclosure and the body fluid test device are in communication.

An inhibiting member for providing a suction means connecting portion at the proximal end of the bodily fluid testing device of the present invention and inhibiting the body fluid from flowing directly from the suction portion to the suction means connecting portion in the body fluid testing device body on the distal end side of the suction means connecting portion It is desirable to provide With this configuration, body fluid can easily flow into the indicator enclosure when a body fluid suction operation is performed. Therefore, the sucked body fluid can be efficiently brought into contact with the indicator, and the inspection can be performed more reliably. In addition, if the obstruction member divides the flow passage in the main body into a first flow passage that communicates the suction portion and the communication opening / closing means and a second flow passage that communicates the suction means connection portion and the communication opening / closing means. The above effect becomes more remarkable.

It is also desirable to make the indicator enclosure part detachable from the body fluid testing instrument body. With such a configuration, once the body fluid is sucked and brought into contact with the indicator, the used indicator enclosure is removed and replaced with an unused one, so that the body fluid can be inspected again. Moreover, if it replaces | exchanges for the indicator which performs another test | inspection, a some test | inspection can be performed continuously. With this configuration, when the inspection is repeatedly performed, it is not necessary to replace the entire inspection instrument for each inspection, which is economical.

Further, as a mechanism for preventing the inner cylinder and the outer cylinder from coming off, a shape is provided in which either one of the lumen of the outer cylinder and the outer surface of the inner cylinder has a circumferentially formed groove and the other is fitted with the groove. It is also useful to provide a rib. With this configuration, when the inner cylinder and the outer cylinder are fitted and the groove and the rib are fitted, the movement in the axial direction is restricted. Therefore, it becomes difficult for the inner cylinder to come off from the outer cylinder naturally.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of an inspection instrument of the present invention. According to this figure, an inspection instrument 1 of the present invention comprises an indicator enclosure 3 containing an indicator that changes depending on the properties of body fluid when it comes into contact with the body fluid, and a main body 2 provided with the indicator enclosure 3 on the side surface. Consists of An inhalation part 23 serving as an inlet for inhaling body fluid into the inspection instrument 1 is provided on the distal end side of the main body part 2. Further, a suction means connecting portion 24 to which means for sucking body fluid (hereinafter referred to as suction means) such as a syringe and a pump can be connected is provided on the base end side of the main body portion 2.

FIG. 2 is a perspective view of an inner cylinder constituting the body fluid test device main body of the present invention, and FIG. 3 is a sectional view thereof. According to this configuration, the inner cylinder 21 is a hollow cylinder having a suction portion 23 at the tip, and the inner cylinder opening 4 is provided on the side surface.

FIG. 4 is a perspective view of an outer cylinder constituting the inspection instrument body 2 of the present invention, and FIG. 5 is a cross-sectional view thereof. The outer cylinder 22 is provided with a suction means connecting portion 24 to which the suction means can be connected at the base end, and the distal end is configured so that the inner cylinder can be rotatably inserted. An outer cylinder opening 5 is provided on the side surface of the portion into which the inner cylinder 21 is inserted to communicate the inner cavity of the outer cylinder 22 with the inside of the indicator enclosure 3. Further, the outer cylinder 22 can be provided with an indicator enclosure 3 on its side surface, and the inside of the indicator enclosure 3 and the lumen of the inspection instrument body 2 communicate with each other via the outer cylinder opening 5.

When the inner cylinder is inserted into the outer cylinder, the inspection instrument body 2 matches the lumen of the inner cylinder 21 by matching the positions of the inner cylinder opening 4 and the outer cylinder opening 5 according to the rotation position of each other. The indicator enclosure 3 is configured to communicate with each other, and the communication between the lumen of the inner cylinder 21 and the indicator enclosure 3 can be closed by shifting the positions of the inner cylinder opening 4 and the outer cylinder opening. (Hereinafter, this mechanism is also referred to as communication opening / closing means). In addition, although the outer cylinder 22 and the indicator enclosure part 3 may be integral, it is more preferable to set it as the structure which can be attached or detached. By making the indicator part 3 detachable, the used indicator part 3 is removed from the main body part 2 and newly used when the indicator 31 once contained is in contact with the body fluid, and then newly used. The inspection can be performed again simply by connecting to the main body 2. When the indicator enclosure 3 is detachable, it is also useful to provide a protrusion 6 that protrudes outward of the outer cylinder, and to provide the outer cylinder opening 5 in the protrusion. By fitting the protrusion 6 and the indicator enclosure 3, the indicator enclosure 3 can be easily and reliably attached to the main body 2.

FIG. 6 is a cross-sectional view when the inner cylinder 21 and the outer cylinder 22 described so far are fitted and the outer cylinder 22 and the indicator enclosure 3 are connected. The inner cylinder 21 is inserted into the outer cylinder 22 in a rotatable state. Further, when the inner cylinder 21 and the outer cylinder 22 are fitted, a flow path 211 that connects the suction portion 23 and the suction means connection portion 24 is formed. In this state, when the inner cylinder and / or the outer cylinder are rotated in the circumferential direction and the positions of the inner cylinder opening 4 and the outer cylinder opening 5 coincide with each other, as shown in FIG. The inside of 3 communicates. Further, when the inner cylinder and / or the outer cylinder are rotated in the circumferential direction to shift the position of the inner cylinder opening 4 and the position of the outer cylinder opening 5, the indicator enclosure from the channel 211 as shown in FIG. The flow path into 3 is closed. Therefore, the flow path 211 and the indicator enclosure 3 are not in communication.

A method for inspecting body fluid using the inspection instrument of the present invention will be described. First, a suction means (not shown) is connected to the suction means connection portion 24. When confirming the position of the catheter inserted into the body, the inhalation portion 23 of the inspection instrument body is attached to the end portion of the catheter that is outside the body. Then, suction operation is performed by the suction means with the indicator enclosure 3 positioned below the main body, and negative pressure is applied to the flow path 211 in the main body to inhale body fluid from the suction section 23 into the inspection instrument 1. To do. When the suction operation is performed, the positions of the inner cylinder opening 4 and the outer cylinder opening 5 are matched by the above-described method, and the flow path 211 in the main body and the indicator enclosure 3 are communicated with each other. As shown, the inhaled body fluid flows into the indicator enclosure 3 through the channel 211. By observing the change of the indicator 31 when it comes into contact with the body fluid, the body fluid can be inspected. After the inhaled body fluid reaches the indicator enclosure 3, the outer cylinder and / or the inner cylinder is rotated in the circumferential direction as shown in FIG. 7, and the positions of the inner cylinder opening 4 and the outer cylinder opening 5 are shifted. When the flow path from the flow path 211 to the indicator enclosure 3 is closed, the body fluid in the indicator enclosure 3 can be retained in the indicator enclosure 3 and does not flow backward into the flow path 211.

It is also useful to provide a mechanism capable of recognizing the communication state of the communication opening / closing means in the inspection instrument body. As an example of this mechanism, for example, as shown in FIG. 1, a marker 7 is provided on the outer surface of the inner cylinder and the outer cylinder, and when the positions of the inner cylinder side marker and the outer cylinder side marker coincide, A configuration in which the position of the opening on the side surface and the position of the opening on the side surface of the outer cylinder coincide with each other, or as shown in FIG. 12 and FIG. It is conceivable that a concave portion 82 corresponding to the convex portion 81 is provided, and the position of the opening on the side surface of the inner cylinder and the position of the opening on the side surface of the outer cylinder coincide when the side end of the concave portion 82 and the convex portion 81 contact.

As shown in FIGS. 8 and 9, it is also useful to provide the inspection instrument main body with an inhibiting member 214 that inhibits the sucked body fluid from flowing directly from the suction portion to the suction means connection portion. By providing the inhibiting member 214, the sucked bodily fluid can easily flow into the indicator enclosure 3 without directly flowing into the sucking means when performing the bodily fluid sucking operation, and the bodily fluid can be more efficiently performed even when the amount of sucked bodily fluid is small Can be inspected. Further, as shown in FIGS. 10 and 11, the obstruction member 214 causes the flow channel in the main body portion to communicate the suction portion and the communication opening / closing means, and the second flow channel communicating the suction means connecting portion and the communication opening / closing means. It is also preferable that the flow path 213 be divided. With this configuration, direct communication from the suction portion to the suction means connection portion is completely blocked by the inhibition member, and the suction portion and the suction means connection portion are communicated only via the communication mechanism with the indicator enclosure. Therefore, the sucked body fluid can be surely flowed into the indicator enclosure without being directly sucked into the suction means.

In order to make it difficult for the inner cylinder 21 and the outer cylinder 22 to come out of each other when the inner cylinder 21 and the outer cylinder 22 are fitted, a separation preventing mechanism as shown in FIG. 14 may be provided. As a structure of the separation preventing mechanism, either one of the inner cylinder and the outer cylinder is provided with a rib 91 for preventing separation as shown in FIG. 2, and the other is prevented from fitting with the rib 91 as shown in FIG. A structure in which a groove 92 is provided is conceivable. When the inner cylinder is inserted into the outer cylinder with such a configuration, the rib 91 and the groove 92 are fitted. By this fitting, the rotational movement of the inner cylinder and the outer cylinder is not hindered, and the movement of the inner cylinder in the axial direction relative to the outer cylinder is hindered. Therefore, it becomes difficult to remove the inner cylinder from the outer cylinder.

As shown in FIG. 1, it is also preferable to provide a slip stopper 10 made of a plurality of protrusions and annular ribs on the outer wall of the suction portion 23. With this configuration, when the inspection device of the present invention is inserted into and connected to a hollow connection portion such as a catheter or a tube, and body fluid is inhaled into the inspection device 1 via the catheter or tube, the hollow connection portion of the catheter or tube is used. It becomes difficult for the inspection instrument 1 to fall off.

In the examples described so far, an example has been described in which the inner cylinder includes a suction portion and the outer cylinder includes a suction means connection portion. However, the inner cylinder includes a suction means connection portion, and the outer cylinder includes a suction portion. It may be. Even in this case, when the inner cylinder and the outer cylinder are fitted in a rotatable state, the opening provided on the side surface of the inner cylinder matches the position of the opening provided on the side surface of the outer cylinder. What is necessary is just the structure which the flow path in the main-body part 2 and the indicator enclosure part 3 communicate.

The indicator 31 included in the indicator enclosure 3 may be any indicator that changes depending on the nature and type of the body fluid and can be examined as a result, such as a pH indicator, an antibody reagent, and a fluorescent reagent. Although the reagent may be sealed as it is as the indicator 31, it may be carried on a carrier. If the carrier at this time is water-absorbing, even if a small amount of inhaled body fluid is absorbed, most of it can be absorbed at the moment of contact with the indicator 31, so that the change of the indicator 31 is easy to observe and is preferable. . In addition, by enclosing a plurality of types of indicators 31 in the indicator enclosure 3, a plurality of tests can be performed simply by bringing the body fluid into contact with the indicator 31 once.

The material which comprises the test | inspection instrument of this invention may be what is generally used as a medical base material. For example, polypropylene, polyethylene, polycarbonate, polyacetal, polyurethane, or a material obtained by mixing them can be considered. In particular, the indicator enclosure 3 is preferably made of a transparent member so that changes in the included indicator 31 can be visually recognized from the outside.

An example in which the position of the tip of a catheter inserted in the body, particularly in the stomach, is confirmed using the inspection instrument of the present invention will be described. First, a catheter is inserted into the stomach from the nasal cavity or mouth by a conventional method. When it is determined that the tip of the catheter has reached the stomach, the inhalation part 23 of the inspection instrument of the present invention is fitted to the end of the catheter outside the body, and the catheter and the inspection instrument 1 of the present invention are connected. Then, a suction means such as a syringe or a pump is connected to the suction means connection portion 24 of the inspection instrument, the indicator enclosure 3 is connected to the main body portion 2, and the inner cylinder and / or the outer cylinder is rotated in the circumferential direction. The positions of the opening on the side surface of the cylinder and the opening on the side surface of the outer cylinder are aligned so that the flow path 211 in the main body and the inside of the indicator enclosure 3 are communicated. When a suction operation is performed by the suction means in this state, negative pressure is generated in the flow path in the main body 2 and in the catheter, and the body fluid in the vicinity of the distal end of the catheter can be sucked. This body fluid is sucked into the inspection instrument 1 and brought into contact with the indicator 31 in the indicator enclosure. By observing the change of the indicator when the aspirated body fluid comes into contact with the indicator 31, it can be determined whether or not the tip of the catheter is in the stomach. That is, since the stomach contents are acidic, if the indicator indicates that the contacted body fluid is acidic, it can be determined that the sucked body fluid is derived from the stomach, and the tip of the catheter that sucked this body fluid is Can be identified as being inside. On the other hand, if the reaction shows that the body fluid is not acidic, the tip of the catheter that sucked the body fluid is considered to be in a part other than the stomach, such as the esophagus and lungs, so remove the catheter and insert it into the stomach again. . As the indicator used in this case, an indicator that changes depending on the pH of the contacted body fluid is desirable. Specific examples include blue litmus, bromothymol blue, bromocresol purple, and chlorophenol red. In this embodiment, the method of inserting the tip of the inspection instrument into the lumen of the catheter and sucking the body fluid through the catheter has been described. However, the body fluid is sucked directly from the tip of the inspection instrument without passing through the catheter. It is also possible to perform an inspection. In addition, by appropriately selecting the type of the indicator, it is possible to inspect body fluids other than stomach contents and fluids other than body fluids.

If the obstruction member 214 is provided between the suction part 23 and the suction means connection part 24, the sucked body fluid does not flow directly from the suction part 23 to the suction means connection part 24, and is always in the indicator enclosure 3. Reach. Therefore, even when the sucked body fluid is a small amount, the body fluid and the indicator can be reliably brought into contact with each other. After the body fluid is sucked and brought into contact with the indicator, the inner cylinder and / or the outer cylinder is rotated in the circumferential direction to close the communication from the flow path in the main body 2 to the indicator enclosure 3, thereby enclosing the indicator The body fluid that has reached the inside of the part 3 does not leak to the outside through the flow path in the main body part 2, and the surroundings are not contaminated.

If the indicator enclosure 3 and the main body 2 are detachable, the used indicator enclosure 3 can be used when the body fluid is brought into contact with the indicator 31 and then another body fluid is immediately sucked for inspection. Is removed from the main body, a new unused indicator enclosure 3 is connected, and the above suction operation is performed, so that the inspection can be performed again.

In the inspection instrument of the present invention, a plurality of inspections can be easily performed by preparing various indicator enclosures in which different types of indicators are enclosed. For example, when testing urine, prepare an indicator enclosure that contains an indicator that reacts to occult blood, an indicator enclosure that encloses an indicator that reacts to urine protein, and an indicator enclosure that encloses an indicator that reacts to sugar. Various inspections can be easily performed by exchanging the indicator enclosing part each time when sucking. Further, if a plurality of types of indicators are simultaneously enclosed in the indicator enclosure and the above suction operation is performed, a plurality of inspections can be performed with a single suction.

The inspection instrument of the present invention can be used effectively in the inspection of body fluid. Although the test device of the present invention alone can be tested, it is particularly effective in applications in which body fluid collection and testing are continuously performed by connecting to a catheter as in the first embodiment. Depending on the type of indicator, it is possible to inspect not only body fluids but also water quality and chemicals.

It is a perspective view of the inspection instrument of the present invention. It is a perspective view of an inspection instrument inner cylinder. It is sectional drawing of an inspection instrument inner cylinder. It is a perspective view of an inspection instrument outer cylinder. It is sectional drawing of an inspection instrument outer cylinder. It is sectional drawing of the state which the flow path in a main-body part and the indicator enclosure part are connecting in the test | inspection instrument of this invention. It is sectional drawing of the state by which the communication in the flow path in a main-body part and an indicator enclosure part is interrupted | blocked with the test | inspection instrument of this invention. It is sectional drawing of the example which provided the obstruction member in the inner cylinder. It is sectional drawing of the example which provided the obstruction member in the inner cylinder. It is sectional drawing of the example which comprised the flow path in a main-body part with the 1st flow path and the 2nd flow path. It is sectional drawing of the example which comprised the flow path in a main-body part with the 1st flow path and the 2nd flow path. It is a perspective view of the example which provided the convex part and recessed part for position alignment in this invention. It is an enlarged view of the convex part for positioning, and a recessed part. FIG. 7 is an enlarged view of a portion A in FIG. 6, and is a cross-sectional view illustrating an example of a separation preventing mechanism.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Inspection instrument 2 Main body part 21 Inner cylinder 211 Channel 212 First channel 213 Second channel 214 Inhibiting member 22 Outer cylinder 23 Suction part 24 Suction means connection part 3 Indicator enclosure 31 Indicator 4 Inner cylinder opening 5 Outer cylinder opening Part 6 Projection 7 Marker 81 Alignment convex part 82 Alignment concave part 91 Detachment prevention rib 92 Detachment prevention groove 10 Non-slip

Claims (7)

In a bodily fluid inspection device that inhales bodily fluid into an inspection device and makes an inspection of the bodily fluid by bringing the indicator in the device into contact with the bodily fluid,
An inhalation part that serves as an inhalation port for bodily fluids into the testing device;
Indicator enclosure containing the indicator,
Communication opening and closing means for opening and closing communication between the indicator enclosure and the inspection instrument body;
A bodily fluid testing device comprising a suction means connecting portion for connecting the testing device to the bodily fluid suction means. The body fluid test instrument body is composed of an inner cylinder and an outer cylinder that are rotatably inserted,
An indicator enclosure is provided on the side of the outer cylinder so that it can communicate with the inside of the outer cylinder.
Furthermore, an opening is provided at the inner cylinder side wall position that matches the indicator enclosure mounting position,
2. The communication opening / closing means according to claim 1, wherein communication between the indicator enclosure and the body fluid test instrument main body is opened and closed by controlling the rotational positions of the inner cylinder and the outer cylinder. Body fluid testing device. The body fluid testing device according to claim 2, further comprising a rotation position recognition means for the inner cylinder and the outer cylinder. The suction means connecting portion is provided at the base end portion of the test instrument, and the obstruction that inhibits the body fluid from flowing directly from the suction section to the suction means connection section in the body fluid test instrument body on the distal end side of the suction means connection portion The body fluid testing device according to any one of claims 1 to 3, wherein a member is provided. The flow path in the main body is divided by the inhibition member into a first flow path that communicates the suction part and the communication opening / closing means and a second flow path that communicates the suction means connection part and the communication opening / closing means. The body fluid testing device according to claim 4. The body fluid testing device according to claim 1, wherein the indicator enclosure is detachable from the main body. The groove formed in the circumferential direction is provided in either one of the lumen of the outer cylinder and the outer surface of the inner cylinder, and the other is provided with a rib having a shape that fits into the groove. Item 8. The body fluid testing device according to Item 2-7.

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