JP2003079724A - Puncture aid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate necessity to perform puncture over and over again to thereby reduce the labor of an acupuncturist and to reduce the burden of the physical pain of a patient by preventing a blood cell from being released from a syringe needle when the operator, who performs a medical action, is to puncture the blood cell with the syringe needle. SOLUTION: A puncture aid 1 is provided with a pressing mechanism composed of a pair of contact parts 9a and 9b, a passing part 11, a supporting part 13 and a supporting point part 15, a pair of contact parts 9a and 9b are contacted on the surface of a forearm 4 while facing on both the sides of a puncture position on a venous blood cell 7, and the passing part 11 is a notched void formed between the contact parts 9a and 9b so that a syringe needle 5 can reach the puncture position on the venous blood cell 7. With the supporting point part 15 as a supporting point, power impressed downward by the operator while having the supporting part 13 is transmitted as pressures to the contact parts 9a and 9b by the pressing mechanism.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a puncture aid, for example, a puncture aid when a practitioner performing a medical procedure punctures a blood vessel with an injection needle or a catheter of a syringe.

[0002]

2. Description of the Related Art Medical procedures are related to the life of animals including humans, and are required to be carried out appropriately and reliably.

[0003]

By the way, in intravenous injection to the elderly, the practitioner squeezes the patient's arm to be injected with a hemostatic band and then lowers the arm or touches the injection site. Most of the time, the patient's finger is repeatedly bent and stretched, and the blood vessel is raised as much as possible. And
The practitioner punctures an individual patient with a venous needle at the stage when it is determined that the vein is maximally raised.

However, the blood vessel wall of the elderly patient is stiff, and the tissue around the blood vessel is often in a poor condition due to aging. Therefore, the blood vessel escapes from the needle tip of the venous needle, and the puncture often fails. .

In such a case, repeated punctures are tried, so that the physical pain associated with the patient's pain increases. Further, in the case of a blood test, if repeated punctures are made, tissue fluid will be mixed into the voted blood, which may cause an incorrect test result to be obtained.

[0006] On the other hand, in the case of continuously administering a drug to a long-term inpatient, a catheter is left in place, but continuous drug injection usually causes vascular pain and phlebitis at the puncture position. is there. Therefore, it is necessary to change the puncture position and puncture the catheter again.

Even in such a case, repeated punctures not only cause physical pain such as pain to the patient, but also cause extra damage to the puncture position, resulting in vascular pain and phlebitis. Contribute to hastening the occurrence of.

As described above, when a puncturing means such as an injection needle or a catheter is punctured into a blood vessel existing in a body part, if the blood vessel escapes from the puncturing means, the above-mentioned problems occur. On the other hand, it is a complicated work for the practitioner to change the strength of the blood vessel by a chemical so as not to escape from the puncture means.

Therefore, an object of the present invention is to prevent the blood vessel from escaping from the puncturing means by a simple work when the practitioner punctures the blood vessel with the puncturing means, and to reduce the labor of the practitioner, and to repeat it. Another object of the present invention is to provide a puncture assisting tool that reduces the burden of physical pain such as pain on the patient by eliminating the need for puncture.

[0010]

The invention according to claim 1 is
A puncture assisting tool for puncturing a blood vessel existing in an elastic puncture site with a puncture means, which includes a pair of contact portions, a passage portion, and a pressing mechanism.

The pair of contact portions face each other across the puncture position of the blood vessel and contact the surface of the elastic puncture site.
The passage portion is formed between the contact portions so that the puncture means reaches the puncture position of the blood vessel. The pressing mechanism transmits a pressing force to the contact portion.

As a result, the pair of contact portions face each other across the puncture position of the blood vessel and come into contact with the surface of the elastic puncture site, and the pair of contact portions are pressed against the elastic puncture site by the pressing force from the pressing mechanism. The blood vessel is fixed between the contact portions that have cut into the puncture site.

According to a second aspect of the invention, in the first aspect, the passage portion is formed by a void.

As a result, the puncture means passes through the void without any obstacle and reaches the puncture position of the blood vessel.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the puncture means is provided with a visual blocking means for eliminating visual movement from a predetermined direction until the puncture means reaches the puncture position of the blood vessel. There is.

As a result, it cannot be seen that the puncture means reaches the puncture position of the blood vessel from the direction in which the visual observation of the movement is eliminated.

According to a fourth aspect of the present invention, in any one of the first to third aspects, the pressing mechanism forms a predetermined elevation angle with respect to the contact surfaces of the pair of contact portions, and each of the pair of contact portions. It has a supporting part connected to one end of the.

As a result, the practitioner can carry out work while holding the support portion. Then, the practitioner does not need to apply a force to the contact portion itself, but may apply a force to the support portion so that the contact portion faces the elastic puncture site.

According to a fifth aspect of the present invention, in the fourth aspect, the end portion of the support portion is located on a plane including the contact surfaces of the pair of contact portions.

As a result, although depending on the relationship with the surface shape of the elastic puncture site, the pair of contact portions and the ends of the support often come into contact with the surface of the elastic puncture site without any force being applied. In this case, since the contact is made at three places, the positioning of the contact portion and the prevention of the displacement can be ensured. Further, since the pressing force is transmitted to the contact portion with the end portion of the support portion as a fulcrum, a small force may be applied to the support portion so that the contact portion faces the elastic puncture site.

The invention according to claim 6 is the invention according to claim 4 or 5, characterized in that the end portion of the support portion has a portion located equidistant from each of the pair of contact portions.

Thus, although depending on the size and the shape of the blood vessel such as the extending direction and the surface shape of the elastic puncture site, the end portion of the support portion is perpendicular to the straight line connecting the contact portions, etc. Since the blood vessel has a portion located on the dividing line, for example, when the blood vessel has a shape extending in one direction and the end portion of the support portion contacts the elastic puncture site, the blood vessel is fixed between the contact portions. In addition, it becomes possible to fix the blood vessel by pressing the blood vessel from directly above the blood vessel whose end portion extends in one direction.

According to a seventh aspect of the present invention, in any one of the first to sixth aspects, the pair of contact portions extend in the same direction.

As a result, since the contact portions are a pair of contact portions extending in the same direction, the contact portions also have an area.
Meanwhile, the blood vessels are fixed. Particularly, when the blood vessel extends in one direction, the pair of contact portions can fix the blood vessel along the same direction with respect to the blood vessel.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a view for explaining a use state of the puncture aid according to the first embodiment of the present invention, FIG. 2 is an enlarged plan view of the puncture aid of FIG. 1, and FIG. FIG. 4 is an enlarged side view of the lancing aid of FIG. 1, and FIG. 4 is IV-IV of FIG.
It is a line sectional view.

The lancing aid 1 has a generally elongated plate shape,
It is used by the practitioner to puncture the venous blood vessel 7 of the patient's forearm 4 with the injection needle 5 of the syringe 3. The lancing aid 1 includes a pair of contact portions 9a and 9b, a passage portion 11, and a pressing mechanism 12.

The passage portion 11 is V from the tip side of the lancing aid 1.
It is a void that is cut out in a letter shape, and the cutout sides are contact portions 9a and 9b. The passage portion 11 is a puncture aid 1
It may be a U-shaped gap notched from the tip side of the, and it is possible to make a region of an appropriate shape and area, but it is versatile for both adults and children, and the length of various injection needles.・
Considering the thickness and the thickness of the syringe barrel, it is practical to set the region to obtain an injection needle puncture angle of about 20 to 30 degrees. The contact portions 9a and 9b have a contact surface 10 having a predetermined width and a predetermined length. The contact surface 10 needs to have a width that does not puncture the skin. On the other hand, if the contact surface 10 has an appropriate length of about several cm, the venous blood vessel 7 can be effectively pressed down, but it is practical. Considering the longest, it is about 10 cm
Is the limit.

The pressing mechanism 12 comprises a support portion 13 connected to one end of each of the contact portions 9a and 9b, and a fulcrum portion 15 which is an end portion of the support portion 13. The support portion 13 is arch-shaped, and is raised by an elevation angle α with respect to the contact surface 10 of the contact portions 9a and 9b to be connected to the contact portions 9a and 9b. The fulcrum portion 15 is located on a plane including the contact surfaces 10 of the contact portions 9a and 9b, and has a portion located equidistant from each of the pair of contact portions 9a and 9b.

The method of using the lancing aid 1 will be described below.

If the patient is an elderly person, the practitioner, after squeezing the forearm 4 of the patient to be injected with a hemostatic band, lowers the forearm 4, hits the injection site, or touches the patient's finger. Performs the act of emphasizing the blood vessels as much as possible by repeatedly bending and stretching.

The practitioner specifies the puncture position 8 and places the puncture aid 1 on the skin surface of the forearm 4 along the venous blood vessel 7 having the puncture position 8. At that time, the practitioner brings the pair of contact portions 9a and 9b into contact with the surface of the patient's forearm 4 so as to be opposed to each other across the puncture position 8 of the venous blood vessel 7, while the fulcrum portion 15 is connected to the fulcrum portion 15. The surface of the forearm 4 is brought into contact with the surface of the forearm 4 so as to be located right above. In this way, the fulcrum 15
Can be placed right above the venous blood vessel 7 because the venous blood vessel 7 extends almost straight and the fulcrum 15
Is perpendicular to the straight line 16 connecting the contact portions 9a and 9b.
The vertical bisector 17 has a portion located on the bisector 17.
Is a straight line passing through the puncture position 8 of the venous blood vessel 7.

The practitioner pushes the support portion 13 downward to lightly contact the contact portions 9a and 9b into the forearm 4 to fix the venous blood vessel 7 between the contact portions 9a and 9b. At this time, the practitioner can efficiently transmit the pressing force to the contact portions 9a and 9b by applying a small force to the support portion 13 as a fulcrum of the force when pressing the fulcrum portion 15.

Here, when the fulcrum portion 15 is set as the fulcrum, a force acts downward from the fulcrum portion 15 to move the forearm 4
Since there is a balance between the action and the reaction between and, the venous blood vessel 7 immediately below the fulcrum 15 is compressed. As a result, the venous blood vessel 7 is fixed not only by being sandwiched between the contact portions 9a and 9b but also by the fulcrum portion 15.

Since the venous blood vessel 7 compressed by the fulcrum portion 15 extends, it becomes a stringed state, and the contact portion 9
The portion at the puncture position 8 of the venous blood vessel 7 sandwiched between a and 9b comes closer or closer to the skin which is the surface of the elastic puncture site.

With the venous blood vessel 7 fixed as described above, the practitioner punctures the puncture position 8 with the injection needle 5 of the syringe 3. Therefore, even if the patient is an elderly person, the venous blood vessel 7 is unlikely to escape from the needle tip of the injection needle 5 due to the fixation, and repeated punctures are unnecessary. Therefore, the labor of the practitioner can be reduced by repeated punctures, and the burden on the patient can be reduced by repeated punctures. Furthermore, in the case of catheter puncture in which a drug is continuously administered intravenously to a long-term hospitalized patient, repeated punctures are not necessary when re-puncturing the catheter for the purpose of changing the puncture position. In addition to being alleviated, the physical pain such as pain is not given to the patient, and no extra damage is given to the puncture position, so that factors that accelerate the occurrence of vascular pain and phlebitis can be suppressed.

FIG. 5 is a plan view of a lancing aid according to a second embodiment of the present invention, and FIG. 6 is a sectional view taken along line VI-VI of FIG. Parts different from the lancing aid 1 of FIG. 2 will be described.

The puncture aid 21 has a pair of contact portions 23a and 23b at both lower ends having a chevron-shaped cross section, and a rectangular hole hollowing out at the top of the chevron-shaped portion as a passage portion 25 of a void.

By thus forming the passage portion 25 as a hole, the contact portion 2 is different from the passage portion 11 having the cutout in FIG.
3a and 23b are integrated, and the pressing force from the support portion 13 is uniformly and surely transmitted to the contact portions 23a and 23b.
Therefore, the fixation between the contact portions 23a and 23b of the venous blood vessel 7 becomes more reliable, and repeated punctures are unnecessary.

FIG. 7 is a plan view of the lancing aid according to the third embodiment of the present invention, and FIG. 8 is a side view of the lancing aid of FIG. Parts different from the lancing aid 1 of FIGS. 2 and 3 will be described.

The lancing aid 31 includes contact portions 33a and 33b.
Is provided with a plate-shaped cover 37 attached to the tip of the.
The tips of the contact portions 33a and 33b are connected to the lower end of the cover 37, and the passage portion 35 is a void formed by a triangular hole. The cover 37 rises from the front (left side in the drawing) at an angle such that it cannot be directly observed that the injection needle 5 reaches the puncture position 8 through the passage portion 35.

By providing such a cover 37, when the practitioner punctures the injection needle 5 of the syringe 3 at the puncture position 8 of the venous blood vessel 7, the patient must wait until the injection needle 5 reaches the puncture position 8. Since it is not necessary to directly observe the movement of the needle, the blindfold effect can be obtained, and the fear of the needle tip on the patient can be suppressed. If the cover 37 is not transparent or semi-transparent, the blindfold effect is particularly large. Further, as a preferable example for children, a character may be attached to the cover 37, and the fear of the injection needle 5 can be reduced more than the blinding effect of the cover 37.

FIG. 9 is a plan view of a puncture assisting tool according to a fourth embodiment of the present invention, and FIG. 10 is a sectional view taken along line XX of FIG.

The puncture aid 41 is intended to allow the practitioner to use it from the direction perpendicular to the venous blood vessel 7, and of the U-shaped portion including the connecting portion 44 connecting the contact portions 43a and 43b. Contact portions 43a, 43 composed of opposing portions of
b, a passage portion 47 of a void formed by being surrounded by the connection portion 44 and the contact portions 43a and 43b, and a support portion 45 connected to a side portion of the contact portion 43b.

As shown in FIG. 10, the support portion 45 has a curved shape along the curved surface of the arm. With such a shape of the support portion 45, the practitioner presses the support portion 45 with fingers when supporting the patient's arm, and the contact portions 43a, 43
It is possible to apply a pressing force to b. The support portion 45
May have a flat plate shape so that it is located on the surface formed by the contact portions 43a and 43b, that is, the entire puncture aid 41 is located on a flat surface. Here, the end portion of the supporting portion 45 does not play the role of a fulcrum, and the pressing mechanism 12 is configured only by the supporting portion 45.

Thus, even if the support portion 45 is not connected to the contact portions 43a and 43b in the direction in which the venous blood vessel 7 extends, even if the end portion of the support portion 45 does not serve as a fulcrum portion, the contact portions 43a and 43b. It is possible to fix the venous blood vessel 7 in between. That is, the fulcrum is used in order to efficiently transmit the pressing force to the contact portion with a small force by using the "lever principle", and the pressing mechanism 12 directly applies the force to the contact portion itself. Instead of being added, the contact portion may have a structure capable of transmitting the pressing force toward the forearm 4 to the contact portion.

In each of the first to fourth embodiments, the passage portion is a void, but if the injection needle 5 passes through, it may have a thin film structure. In that case, the thin film is preferably made of a material such as transparent or translucent that allows the puncture position to be visually recognized. However, from the viewpoint of hygiene and preventing blunting of the needle tip of the injection needle 5, the passage portion is preferably a void.

In the first to third embodiments, the end of the support portion 13 is used as the fulcrum portion 15 and is positioned on the plane including the contact surface of the contact portion. However, it is not positioned on the plane, for example, from the plane. Even if it is displaced upward, depending on the shape of the forearm 4 at the portion contacting the contact portion and the shape of the forearm 4 at the portion contacting the end portion of the support portion 13, the end portion of the support portion 13 may not function as a fulcrum. Needless to say.

Furthermore, in the first to third embodiments, the end portion of the support portion 13 is used as the fulcrum portion 15 and is positioned directly above the venous blood vessel 7, but it is not necessary to be positioned directly above. Needless to say, it can function as the fulcrum portion 15. For example, even if the end portions of the support portion 13 are also branched and positioned so as to face each other with the venous blood vessel 7 sandwiched therebetween, each end portion of the branched support portion 13 functions as a fulcrum portion.

Further, in the first to third embodiments, the end portion of the support portion 13 has a portion located on the bisector perpendicular to the straight line connecting the contact portions, and is directly above the venous blood vessel 7. However, depending on how the venous blood vessel 7 extends, it may be located directly above the venous blood vessel 7 even if it is not on the vertical bisector between the contact portions, as a matter of course. The support portion 13 (including the end portion) may have a shape adapted to the extension of the.

Furthermore, in the first to fourth embodiments, the material of the puncture aid is not limited, but blood can easily come into contact during use, so a disposable product should be used to avoid infection. Is preferred. Specifically, considering that it can be mass-produced, is lightweight, inexpensive, and has elasticity as a function, polyurethane, vinyl chloride, polystyrene, polyethylene, polypropylene,
It is preferable to use a resin molded product such as nylon or vinylon. The material of the puncture aid may be made of metal, bamboo, or wood. However, in the case of metal, it is generally expensive and heavy, and it requires multiple processing steps. Requires a processing technique and a processing step for imparting predetermined elasticity and bending strength, and it is necessary to consider that it is considered unsuitable for mass production.

Further, in the first to third embodiments, the supporting portion 13 is formed in an arch shape, but it may be in a plate shape parallel to the contact surface of the contact portion. However, in the case of the plate shape, it is necessary to have rigidity such that the contact portion does not float when the support portion 13 is pressed downward. Here, the support part 1
By making 3 a plate, the pressing mechanism has no fulcrum.

FIG. 11 is a view showing a lancing aid according to the fifth embodiment of the present invention.

The puncture assisting tool 51 has a pressing mechanism 54 having a length longer than the circumference of the forearm 4 and capable of forming a knot 57 by its both ends, and a predetermined interval in the string 55. A pair of protruding contact portions 53a and 53b, which are attached so that the contact portions 53a and 53b and the cord 55 are attached.
And a passage portion 59 formed of a space formed between

To attach the puncture aid 51 to the forearm 4, the practitioner arranges the contact portions 53a and 53b on the skin surface of the forearm 4 at a position sandwiching the venous blood vessel 7, and wraps the string 55 around the forearm 4 to end it. The parts are pulled together and squeezed together, and the knot 57 is formed and fixed using both hands. The pressing mechanism 54 also has no fulcrum.

Even in this way, the contact portions 53a, 53b
The venous blood vessel 7 can be fixed in between. In addition, it is preferable to take measures to prevent the knot 57 from loosening, for example, the knot 5
A device may be devised in which 7 is replaced with Velcro (registered trademark) having a large adhesive force.

FIG. 12 is a view showing a lancing aid according to the sixth embodiment of the present invention.

The puncture aid 61 includes a first arc portion 69 and a second arc portion 69.
A pressing mechanism 65 including a circular arc portion 71 and a joint 67 for rotatably bending the both portions, and a pair of projecting contact portions 63 attached to predetermined positions inside the first circular arc portion 69.
a, 63b, contact portions 63a, 63b, and first arc portion 69
And a passage portion 73 formed of a space formed between

The first arc portion 69 and the second arc portion 71 are made of a material such as metal, can be opened and closed by the joint 67, and have a ring shape when closed. Therefore, the practitioner closes the ends of the first arc portion 69 and the second arc portion 71 so as to sandwich the patient's forearm 4 therebetween, thereby closing the contact portions 63a and 63b with a pressing force. It can be transmitted and the venous blood vessel 7 can be fixed between the contact portions 63a and 63b. Where the joint 6
7 indicates that the practitioner has an end portion of the first arc portion 69 and a second arc portion 71.
It functions as a fulcrum when applying force to the end of the.

The second circular arc portion 71 may be connectable to an intravenous injection pillow (not shown). Furthermore, an intravenous injection pillow (not shown) is used instead of the second circular arc portion 71, and the joint 67 is used.
The first circular arc portion 69 connected by the above may be connected to the pillow for intravenous injection.

However, from the viewpoint of workability, manufacturing cost and functionality, the first embodiment and the like are preferable to the sixth embodiment, and there is no need to increase the size of the apparatus. Also, the first embodiment and the like are more preferable than the sixth embodiment.

FIG. 13 is a plan view showing a puncture aid according to a seventh embodiment of the present invention and is a view corresponding to FIG. 2, and FIG. 14 is a side view showing the puncture aid in FIG. FIG. 4 is a diagram corresponding to FIG. 3. Portions different from FIGS. 2 and 3 will be described.

A laterally long through hole 81 is formed in the fulcrum portion 15 of the puncture assisting tool 80 so as to extend in the direction opposite to the pair of contact portions 9a and 9b, and a shaft portion 83 having a vertically protruding disk portion is formed in the laterally long through hole. 81 is slidably attached.

By the way, even if the venous blood vessel 7 extends in various ways, in order for the fulcrum portion 15 to be located right above the venous blood vessel 7,
The fulcrum portion 15 may have any shape as long as it extends in the opposing direction of the pair of contact portions 9a and 9b. However, the more the fulcrum portion 15 extends in the opposite direction, the larger the contact portion of the fulcrum portion, which is unnecessary for pressing the venous blood vessel 7, and the more the pressing force is dispersed.

Therefore, the shaft portion 8 having the contact area as small as possible is provided by providing the fulcrum portion 15 with the slide mechanism including the laterally long through hole 81 and the shaft portion 83 as described above.
The lower end side disk portion of 3 can be positioned only directly above the venous blood vessel 7 by sliding, and the compressive force can be concentrated on the venous blood vessel 7.

In the first to seventh embodiments, the target of using the lancing aid is limited to humans, but the target of using the lancing aid is an animal such as a dog or a cat. May be.

The present invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications can be made within the scope of the technical idea described in the claims.

[0068]

According to the first aspect of the present invention, the pair of contact portions are in contact with each other across the puncture position of the blood vessel and contact the surface of the elastic puncture site, and the pair of contact portions are pressed by the pressing mechanism. Since the blood vessel is pressed against the elastic puncture site and is fixed between the contact portions that bite into the elastic puncture site, it is possible to prevent the blood vessel from escaping from the puncture device when the practitioner punctures the blood vessel. It will be possible. Therefore, the practitioner can surely puncture the blood vessel with the puncture means by a simple method, and repeated punctures are unnecessary, and labor can be reduced. In addition, since repeated punctures are unnecessary, the patient does not have to suffer pain frequently, and the burden is reduced.

According to the invention of claim 2, since the practitioner can pass the puncture means through the void without any obstacle to reach the puncture position of the blood vessel, the puncture means is not worn down. There is no loss of hygiene.

According to the third aspect of the present invention, since the manner in which the puncture means reaches the puncture position of the blood vessel cannot be visually observed from a predetermined direction, a person whose visual direction coincides with the predetermined direction is terrified by visual perception of the puncture state. I don't feel. Further, in particular, if the patient's visual direction coincides with the above-mentioned predetermined direction, the patient will not be able to visually observe the puncture, and the fear of puncture often seen in pediatric patients can be reduced.

According to the invention of claim 4, the practitioner can carry out the work while holding the supporting portion, and it is not necessary to apply a force to the contact portion itself. Therefore, the pressing force can be reliably transmitted to the contact portion in a state where the workability is high. Due to the high workability, the practitioner can surely puncture an appropriate puncturing position.

According to the fifth aspect of the invention, the pair of contact portions and the end portions of the support portion often come into contact with the surface of the elastic puncture site without applying any force. In that case, at three locations. The contact ensures positioning of the contact part and prevention of displacement of the contact part, and since the pressing force is transmitted to the contact part with the end part of the support part as a fulcrum, the contact part faces the elastic puncture site. Since only a small amount of force needs to be applied, it is possible to fix the work more easily and reliably.

According to the sixth aspect of the present invention, when the blood vessel can be pressed and fixed by the end portion of the supporting portion, it is possible to further prevent the blood vessel from escaping from the puncturing means by increasing the number of fixing points, and at the same time, the supporting portion. When the blood vessel is pressed at the end of the blood vessel, the blood vessel expands and becomes a stringed state, and the part of the blood vessel puncturing position sandwiched between the contact parts comes closer or closer to the surface of the elastic puncture site. The blood vessel is more securely fixed between the contact portions.

According to the seventh aspect of the present invention, since the contact portions are a pair of contact portions extending in the same direction, a region having an area is formed between the contact portions, and the blood vessel is fixed between the contact portions, so that a reliable fixation is achieved. . Especially when the blood vessel extends in one direction,
It suffices that the pair of contact portions are along the same direction with respect to the blood vessel, and the blood vessel is surely fixed by fixing before and after the puncture position.

[Brief description of drawings]

FIG. 1 is a view for explaining a usage state of a puncture assisting tool according to a first embodiment of the present invention.

FIG. 2 is an enlarged plan view of the lancing aid of FIG.

FIG. 3 is an enlarged side view of the lancing aid of FIG.

FIG. 4 is a sectional view taken along line IV-IV of FIG.

FIG. 5 is a plan view of a lancing aid according to a second embodiment of the present invention.

6 is a sectional view taken along line VI-VI of FIG.

FIG. 7 is a plan view of a lancing aid according to a third embodiment of the present invention.

8 is a side view of the lancing aid of FIG. 7. FIG.

FIG. 9 is a plan view of a lancing aid according to a fourth embodiment of the present invention.

10 is a sectional view taken along line XX of FIG.

FIG. 11 is a view showing a lancing aid according to a fifth embodiment of the present invention.

FIG. 12 is a view showing a lancing aid according to a sixth embodiment of the present invention.

FIG. 13 is a plan view showing a lancing aid according to a seventh embodiment of the present invention, which is a view corresponding to FIG. 2.

14 is a side view of the lancing aid of FIG. 13 corresponding to FIG. 3. FIG.

[Explanation of symbols]

1, 21, 31, 41, 51, 61, 80 Puncture assisting tool 5 Injection needle 7 Vein blood vessel 8 Puncture position 9a, 9b, 23a, 23b, 33a, 33b, 43
a, 43b, 53a, 53b, 63a, 63b Contact portion 11, 25, 35, 47, 59, 73 Passing portion 12, 54, 65 Pressing mechanism 13, 45 Support portion 15 Support point portion

Claims (7)

[Claims] 1. A puncture aid for puncturing a blood vessel residing in an elastic puncture site with a puncture means, the pair of contacts facing each other across the puncture position of the blood vessel and contacting the surface of the elastic puncture site. A puncture aid, comprising: a portion, a passage portion formed between the contact portions so that the puncture means reaches a puncture position of the blood vessel, and a pressing mechanism that transmits a pressing force to the contact portion. 2. The lancing aid according to claim 1, wherein the passage portion is formed by a void. 3. The puncture aid according to claim 1 or 2, further comprising a visual blocking means for eliminating visual observation from a predetermined direction of movement of the puncturing means until reaching the puncturing position of the blood vessel. 4. The pressing mechanism has a support portion that is connected to one end of each of the pair of contact portions at a predetermined elevation angle with respect to the contact surfaces of the pair of contact portions. The puncture aid according to any one of 1. 5. The lancing aid according to claim 4, wherein the end portion of the support portion is located on a plane including the contact surfaces of the pair of contact portions. 6. The puncture aid according to claim 4, wherein the end portion of the support portion has a portion located equidistant from each of the pair of contact portions. 7. The lancing aid according to claim 1, wherein the pair of contact portions extend in the same direction.