Puncture assistance device

Abstract

To provide a puncture assistance device that can be easily mounted on arms of any size, has a simple structure, and facilitates an operation of inserting a needle into a blood vessel.SOLUTION: Effects obtained when a puncture assistance device 1 is mounted will be described, in which a second piece portion 3 is brought into close contact with an upper arm while advancing and retracting an arm portion 3a via a first piece portion 2 and a slide arm 4, and is fixed by an attachment / detachment stopper 5. When an upper arm is mounted on the puncture assistance device and an ultrasonic apparatus is applied to an epidermis e, pressure applied from the ultrasonic apparatus is transmitted in a direction toward the epidermis, a blood vessel d, a bone f, and the upper arm, whereas pressure applied from the puncture assistance device is transmitted in a direction toward the upper arm, the bone, the blood vessel, the epidermis, and the ultrasonic apparatus. By an effect of being able to fix stresses that cause the blood vessel to automatically move downward and obliquely left and right when vascular puncture is performed, the puncture assistance device reduces a burden on a patient who is repeatedly punctured with a needle, improves a success rate of puncture by medical personnel, and improves workability.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a puncture assisting device that assists in puncturing a blood vessel. [Background technology]

[0002] In recent years, the frequency of peripherally inserted central catheters (PICCs) has increased in medical settings for purposes such as nutritional and hydration support. These catheters are believed to have a low risk of fatal complications, such as pneumothorax and hemothorax, and catheter-associated bloodstream infections. Accordingly, the number of facilities and medical professionals capable of PICC placement has also increased year by year. PICC insertion is typically performed using ultrasound-guided catheterization, which is a highly advanced technique for medical professionals unfamiliar with ultrasound devices. Because individual patients' blood vessel sizes vary, it is necessary to identify and select a large vessel using ultrasound. However, even if a large vessel is selected, there may be adjacent arteries or nerves, which could lead to mispuncture. If nerve damage occurs, medical professionals may be held liable for compensation. In response to this situation, devices have been proposed to safely and reliably assist in ultrasound-guided catheterization (Patent Documents 1-3). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-156053 [Patent Document 2] Japanese Patent Application Laid-Open No. 2021-20033 [Patent Document 3] Japanese Patent Application Laid-Open No. 2021-145825 Summary of the Invention [Problem to be solved by the invention]

[0004] The puncture aids described in Patent Documents 2 and 3 are separate devices that require assembly. Although the size can be adjusted to fit different arm thicknesses, practical application is time-consuming. Furthermore, when attached to the arm, the device may exert strong pressure on the skin on the back of the patient's arm. Another issue is the instability of the ultrasound device when operated.

[0005] The present invention was devised to solve the problems associated with the above-mentioned technologies. The purpose of the present invention is to provide a puncture aid that has a simple structure but can apply pressure to the skin, subcutaneous tissue, and muscle, and can fixate the movement of a blood vessel when puncturing a deep blood vessel. Furthermore, the present invention is adaptable to various arm sizes and has a structure for stabilizing ultrasonic operation. [Means for solving the problem]

[0006] In a puncture assisting device consisting of a first piece and a second piece with elastic deformation function that is fitted onto the upper arm, the problems described in Patent Documents 2 and 3 can be solved by providing a fixing device that fixes the first piece, an arm that fixes the second piece, a moving mechanism that allows the second piece to move forward and backward relative to the first piece, and a hand rest on either the fixing device or the arm.

[0007] The problems described in Patent Documents 2 and 3 can be solved by providing a cord holder that fixes or supports the ultrasonic cord. [Effects of the Invention]

[0008] The puncture assisting device is characterized in that the first piece is designed to have a larger area on which the upper arm can be placed than the second piece, and the area of ​​the C-shape in the longitudinal cross section is larger.

[0009] The arm moves back and forth along the slide rail, allowing the second piece to be adjusted to fit any arm size. This allows the arm to be securely fixed, and the first piece and the second piece fit closely to the upper arm, increasing the pressure applied to the subcutaneous tissue, muscles, and other deep areas of the upper arm, thereby further preventing stress that would cause blood vessels to move downward or diagonally to the left and right, compared to Patent Documents 2 and 3.

[0010] The puncture aid is characterized in that the first convex portion provided in the longitudinal direction of the inner surface of the second arm portion is capable of lifting the muscle while applying upward pressure when the upper arm is placed on it.

[0011] Furthermore, the first convex portion is structured so that when the upper arm is placed on the puncture aid, skin that falls off from the back of the upper arm can slip into the concave portion (groove) of the first convex portion, allowing the upper arm and the puncture aid to be in even closer contact.

[0012] The second convex portion provided at the tip of the longitudinal upper open portion of the first piece and the second piece is structured to face diagonally upward, and is characterized in that the puncture aid is structured so that when the muscle is lifted upward by the first convex portion, the epidermis is less likely to come out of the first open portion.

[0013] Furthermore, the puncture aid is characterized by the fact that it is possible to withstand the tension on the skin to the left and right, which was lacking in Patent Documents 2 and 3, as the upper arm, the first piece, and the second piece are in close contact with each other, and the first convex portion lifts the soft tissue and the muscle, making it difficult for the epidermis to protrude from the second convex portion into the first opening, and at that time the tension on the epidermis to the left and right is more likely to increase.

[0014] The puncture aid is characterized in that the third convex portion provided at the tip of the lower opening portion of the longitudinal inner surface of the first piece and the second piece faces diagonally upward to prevent the skin on the back of the upper arm from getting caught in the second opening portion when the first piece and the second piece engage.

[0015] Furthermore, the fourth convex portion is provided near the center of the longitudinal direction of the inner surface on either the first or second piece, the fall prevention material is integrated with the fourth convex portion, and the first convex portion is provided on the opposite piece, so that the puncture aid can be fitted closely to the arm of a wide range of patients, from those with narrow arm diameters to those with wide arm diameters, and furthermore, the puncture aid can be fitted more closely to the arm than the puncture aids of Patent Documents 2 and 3.

[0016] Furthermore, if the puncture aid is used in the normal manner, the skin will not fall into the second opening. However, in consideration of safety, in the unlikely event that the skin does fall, the puncture aid is characterized by the use of a fall prevention material to prevent the skin from falling into the second opening.

[0017] The fall prevention member is made of a flexible material, and the arm portion is attached to the slide. The puncture assisting device is structured so that the fall prevention material does not get in the way when the first piece and the second piece engage with each other by moving forward and backward using an idle rail.

[0018] In addition, the fourth convex portion and the fall prevention material that is integrated with the fourth convex portion are capable of deforming according to the shapes of the first piece portion and the second piece portion of the puncture assisting device.

[0019] Furthermore, like the first convex portion, the fall prevention material that is integrated with the fourth convex portion can also apply pressure to the muscle grooves in the arm, making it possible to increase skin tension in patients with reduced skin tension, and is similar to the puncture aids of Patent Documents 2 and 3, and the puncture aid that can apply even more pressure than the first convex portion.

[0020] Furthermore, the fall prevention material, which is integrated with the fourth convex portion, and the two convex portions of the first convex portion make it possible to apply pressure to the muscle grooves, skin, soft tissue, and muscles of the arm, and further suppress the movement of blood vessels.

[0021] The fall prevention member integrated with the fourth convex portion is not limited to being provided on either of the first and second pieces, but can be modified to be integrated with both pieces, as in the first piece. This further increases the pressure applied to the subcutaneous tissue and muscles of the upper arm, and has the characteristic of being able to more effectively prevent blood vessels from moving downward or diagonally to the left and right than Patent Documents 2 and 3.

[0022] A hand rest is provided on the fixing tool and the tip of the arm, and the operator can place his / her hands on it to stabilize the operation of the echo probe.

[0023] To prevent the echo cord from hitting the arm and interfering with the operation of the echo probe during operation, the slide rail is provided with a cord hook, which allows the echo cord to be bundled together.

[0024] Furthermore, the cord holder is detachable and can be adjusted to any position on the slide rail, hand stand, arm, or the puncture aid, allowing the surgeon to better organize the echo cord and reduce interference during operation of the echo probe. [Brief explanation of the drawings]

[0025] [Figure 1] FIG. 2 is a perspective view illustrating the puncture assisting device according to the embodiment. [Figure 2] FIG. 2 is a cross-sectional view of the upper arm for illustrating the movement of blood vessels in the first embodiment when the puncture assisting tool shown in FIG. 1 is not attached. [Figure 3] 1. FIG. 4 is a cross-sectional view of the upper arm for illustrating the movement of blood vessels in the second embodiment when the puncture assisting tool shown in FIG. 1 is attached. [Figure 4] As shown in Figure 3, if the puncture aid is worn in the normal manner, the situation shown in Figure 4 will not occur. However, as an extra safety consideration, Figure 4 has been added as a cross-sectional view of a third embodiment in case the skin should fall out of the second release portion when the puncture aid is in the open state. [Figure 5a] This is a cross-sectional view showing an embodiment in which the puncture assisting device is provided with the fourth convex portion and the fall prevention material that is integrated with the fourth convex portion when the puncture assisting device is in an open state, for the purpose of closing the second opening portion shown in Figure 4. [Figure 5b] This is a cross-sectional view to explain that when the puncture assisting device is in an open state, the fourth convex portion shown in Figure 5a and the fall prevention material that is integrated with the fourth convex portion can be deformed using the moving mechanism, and when the puncture assisting device is in a closed state, the fall prevention material that is integrated with the puncture assisting device and the fourth convex portion can be deformed. [Figure 6] 5a and 5b, and the fall prevention material that is integrated with the fourth convex portion. FIG. 5b is a perspective view illustrating the puncture aid when the puncture aid is in an open state. [Figure 7a] In the fourth embodiment in which an arm is attached to the puncture assisting device, the fourth convex portion, and a fall prevention material that is integrated with the fourth convex portion when the puncture assisting device shown in Figure 5a is in the open state, this is a cross-sectional view of the upper arm to explain how the puncture assisting device, the fourth convex portion, and the fall prevention material that is integrated with the fourth convex portion prevent skin from dropping into the second open portion and to explain the movement of blood vessels. [Figure 7b] In the fifth embodiment shown in Figure 5b, when the arm is placed on the puncture assisting device, the fourth convex portion, and the fall prevention material that is integrated with the fourth convex portion, and the movement mechanism is moved, this is a cross-sectional view of the upper arm to explain how the puncture assisting device, the fourth convex portion, and the fall prevention material that is integrated with the fourth convex portion prevent the skin from dropping into the second release portion, and to explain the movement of blood vessels. [Figure 8] FIG. 8 is a cross-sectional view for explaining the puncture assisting tool, the fixing tool, and the hand rest provided at the tip of the arm. [Figure 9] Figure 9 is a perspective view illustrating an example of using the puncture assisting device in which the fall prevention material, which is integrated with the puncture assisting device and the fourth convex portion, is integrated with the first piece portion, and the echo cord is further hung on the cord hook. DETAILED DESCRIPTION OF THE INVENTION

[0026] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0027] 1 to 3 show the puncture aid 1 of a type fitted to an arm, which is made up of the first piece 2 and the second piece 3 having an elastic deformation function, the puncture aid having the fixing device 2a for fixing the first piece 2, the arm 3a for fixing the second piece 3, and a movement mechanism for allowing the second piece 3 to move forward and backward relative to the first piece 2, and characterized in that the first protrusion 7 is formed near the center of the longitudinal direction of the inner circumferential surface of at least one of the first piece 2 or the second piece 3, the area of ​​the C-shape of the first piece 2 is larger than the area of ​​the C-shape of the second piece 3, the first piece 2 is fixed to the fixing device 2a, and the fixing device 2a is provided with a base 11, and an arm base recess 12 is provided in the center of the base to prevent the first piece 2 and the second piece 3 from moving left and right, but this does not necessarily mean that the base 1 1 and the base recess 12 are not essential, and the first protrusion 7 formed near the center of the inner circumferential surface of the second piece 3 in the longitudinal direction is configured to engage with the first piece 2 by moving forward and backward together with the second piece 3 via a slide rail 4. Furthermore, the puncture assisting device 1 is not necessarily limited to being separated as in the first embodiment of FIGS. 1 to 3, but can also be modified into an openable / closable puncture assisting device configured so that the first piece 2 and the second piece 3 close to the arm while opening and closing. The second convex portions 8a, 8b formed at the tip L of the upper opening portion and the third convex portions 9a, 9b formed at the tip m of the lower opening portion in the longitudinal direction of the first arm portion 2 and the second arm portion 3 have a simple structure arranged in the longitudinal direction, and the first arm portion 2 and the second arm portion 3 are formed from the carbon material which is difficult to break, but the concept is not necessarily limited to the carbon material, and the structure can also be modified to use materials such as silicon, Parallax, and plastic, which is the characteristic of the puncture aid 1.

[0028] First, the shape of the puncture aid 1 in Figures 1 to 3 will be described. The first piece 2 and the second piece 3 are elongated and each piece is approximately two-thirds the length of the upper arm. The first piece 2 and the second piece 3 are separate pieces that fit closely to the arm by engaging with each other, and the puncture aid 1 has the characteristic of being adjustable to fit any arm size.

[0029] The puncture assisting tool 1 is characterized in that the first arm 2 has a larger area of ​​the C-shape than the second arm 3, and has a larger area on which an arm can be placed.

[0030] As long as the first arm portion 2 and the second arm portion 3 are configured to apply pressure to the arm, the configuration does not necessarily have to be limited to the C-shape.

[0031] The length of the first piece 2 and the second piece 3 of the puncture aid 1 does not necessarily have to be limited to about 2 / 3, as long as it is long enough to not interfere with bending, rotating, or moving the arm.

[0032] Next, we will explain the first opening a of the puncture assisting tool 1. The first opening a of the puncture assisting tool 1 is structured to reliably secure the area for palpating a blood vessel d, the area to be disinfected, the area to place the ultrasound device g on the arm, and the area to be punctured.

[0033] Furthermore, after the position of the blood vessel d is confirmed with the ultrasonic device g, the puncture aid 1 is fitted to the arm so that the position of the first opening a coincides with the position of the blood vessel d. This eliminates the need to repeatedly use the ultrasonic device g to search for the position of the blood vessel d, improves workability, and makes it possible to insert the needle h into the blood vessel d from the first opening a as shown in Figure 3.

[0034] The puncture assisting device 1 is characterized in that when the first piece 2 and the second piece 3 engage, the width of the first opening portion a can be adjusted, thereby being able to adjust to the width of the ultrasonic device g.

[0035] The puncture assisting tool 1 is characterized in that the tip L of the upper open portion and the tip m of the lower open portion are at an obtuse angle rather than an acute angle, and are structured so as not to injure the skin.

[0036] Next, we will explain the movement mechanism shown in Figures 1 to 9. The main body of the puncture assisting tool is separated into a first piece 2 and a second piece 3, and the first piece 1 is fixed to a fixture 2a using an existing F-clamp (hereinafter referred to as a "vice arm") manufactured by Jorgensen (Hangzhou Great Star Industrial Co., Ltd.) to prevent it from moving back and forth.

[0037] The second piece 3 moves back and forth toward the first piece 2 via a slide rail 4 using an arm 3a, and by engaging using the action of an existing vise arm, the first piece 2 and the second piece 3 become one, making it possible to adjust to any arm size.

[0038] A method for attaching the upper arm to the puncture assisting tool 1 using the movement mechanism described above will now be described. First, the upper arm is fitted into the first piece 2 and the second piece 3 from the triceps side, and the upper arm is placed up to the first protrusion 7. Next, the arm 3a is advanced toward the first piece 2 via the slide rail 4. At this time, while making sure that no skin has fallen into the second opening b, the arm is advanced until the first piece 2 and the second piece 3 come into close contact with the upper arm. This prevents the epidermis from falling into the gap between the first piece 2 and the second piece 3, allowing the upper arm to be safely attached to the puncture assisting tool 1.

[0039] The following describes the first convex portion 7 provided on the second piece 3. The first convex portion 7 provided on the inner circumferential surface in the longitudinal direction of the second piece 3 in Figures 1 to 3 is a convex portion having a height of at least 5 mm, and the puncture assisting device 1 has the characteristic that the pressing force k of the first convex portion 7 easily brings the subcutaneous tissue of the upper arm and the spaces between the muscles c into close contact with the upper arm.

[0040] The first convex portion 7 has a structure that allows the skin to be retained in recesses 10a, 10b, which are at least 5 mm deep and are provided at the position where the first convex portion 7 and the second piece 3 intersect, so that the skin does not easily fall into the second opening b when the first piece 2 and the second piece 3 engage with each other. This makes it difficult for the skin to fall into the second opening b.

[0041] The position of the first convex portion 7 does not have to be limited to the vicinity of the center of the C-shape in the longitudinal direction, and the structure can be changed accordingly. Furthermore, the shape of the first convex portion 7 does not have to be a straight convex portion; it can be changed to a deformed structure such as a spiral convex portion.

[0042] The following describes the second convex portions 8a, 8b provided on the first arm 2 and the second arm 3 of the puncture assisting tool 1. The second convex portions 8a, 8b provided on the longitudinal inner circumferential surfaces of Figures 1 to 3 are incorporated into the longitudinal inner circumferential surfaces of the first arm 2 and the second arm 3 over a range of at least 10 mm from the tip L of the upper open portion to the lower open portion m, and the puncture assisting tool 1 is characterized by being made up of convex portions with a height of 5 mm or more.

[0043] The second convex portions 8a, 8b are easily fitted to the arm, and the structure makes it difficult for the skin to protrude into the first open portion a, and the tension applied to the skin from side to side at this time applies tension to the epidermis e, and the puncture aid 1 is characterized in that it is possible to fix the stress j that moves the subcutaneous tissue, the muscle c, and the blood vessels d downward and diagonally left and right.

[0044] The following describes the third convex portions 9a, 9b provided on the first arm 2 and the second arm 3 of the puncture assisting device 1. The third convex portions 9a, 9b provided on the inner circumferential surfaces in Figures 1 to 3 are incorporated into the longitudinal inner circumferential surfaces of the first arm 2 and the second arm 3 over a range of at least 10 mm from the tip m of the lower open portion to the upper open portion L, and the puncture assisting device 1 is characterized by being made up of convex portions with a height of 5 mm or more.

[0045] The puncture aid 1 is characterized in that the third convex portions 9a, 9b are oriented diagonally upward to easily fit closely to the arm and to prevent the skin from getting caught in the second opening portion b when the first piece 2 and the second piece 3 engage with each other.

[0046] The following describes the material of the puncture aid 1. The elastically deformable material in Figures 1 to 3 is made of a material harder than skin, and the puncture aid 1 is made up of all of the first piece 2, the second piece 3, the first convex portion 7, the second convex portions 8a and 8b, and the third convex portions 9a and 9b, all of which are made of carbon.

[0047] The material having the elastic deformation function does not need to be harder than the skin, but it is a material that does not damage the skin, and the puncture aid 1 can be modified in shape and structure. [Example]

[0048] The puncture aid 1 in Figures 1 to 3 is characterized in that the needle h indwelling in the blood vessel d and the slide arm 4 are unlikely to interfere with the operation during puncture of the blood vessel d by the puncture aid 1 or with the fluoroscopic image when operating the wire advanced into the blood vessel d, even in a situation where the ultrasound g or X-ray is constantly being used, and therefore the puncture aid 1 is made of a material that can improve operability during treatment.

[0049] The movement of the blood vessel d when the puncture assisting tool 1 is not attached will be described below with reference to Figure 2. Figure 2 shows that when the ultrasonic device g is placed on the epidermis e and then the blood vessel d is punctured without the puncture assisting tool 1 attached, stress j that moves the blood vessel d downward and diagonally to the left and right cannot be fixed, and the blood vessel d moves easily when punctured.

[0050] 3 illustrates the effect of attaching the puncture aid 1 and moving the arm 3a back and forth via the first piece 2 and the slide arm 4 to bring the second piece 3 into close contact with the upper arm, and then fastening it with the detachable stopper 5. When the upper arm is attached to the puncture aid 1 and the ultrasonic device g is placed against the epidermis e, pressure i applied from the ultrasonic device g is transmitted in the direction of the epidermis e, the blood vessel d, the bone f, and the upper arm, while pressure k applied from the puncture aid 1 is transmitted in the direction of the upper arm, the bone f, the blood vessel d, the epidermis e, and the ultrasonic device g. This effect of being able to fix the stress j that automatically moves the blood vessel d downward and diagonally left and right when puncturing the blood vessel d reduces the burden on patients who are repeatedly pricked with a needle and improves the success rate and operability of medical professionals when puncturing the blood vessel d.

[0051] We will explain how this will reduce the burden on patients and medical professionals. Because the veins in the upper arm are located deep below the surface of the body, it is difficult to confirm the puncture site by palpation, and the puncture is performed while searching for the veins using ultrasound equipment, etc. During the puncture, the veins automatically move downward or diagonally to the left or right, making operation difficult and leading to an increase in the number of punctures (redoes), which causes great pain for the patient, increases the risk of arterial puncture, nerve damage, post-puncture infection, phlebitis, and insertion site problems, and places a heavy psychological burden on the surgeon. The fixation device we created can easily and safely fix the punctured vein as it moves, and we believe it will reduce the burden on both the patient and the surgeon.

[0052] Next, the fourth convex portion 20 and the fall prevention member 21 integrated with the fourth convex portion according to another embodiment of the present invention will be described in detail with reference to Figures 5a, 5b, 6, 7a, and 7b. In addition, when describing the puncture assisting device 1, the same components are generally designated by the same reference numerals, and repeated description will be omitted. In addition, as will be described in detail later, the fourth convex portion 20 and the fall prevention member 21 integrated with the fourth convex portion In principle, the structures relating to the first arm 2 and the second arm 3, the structure relating to the fixing device 2a that fixes the first arm 2 and the arm 3a that fixes the second arm 3, the structure relating to the moving mechanism that allows the second arm 3 to move forward and backward relative to the first arm 2, the structure relating to the first convex portion 7 formed near the center of the longitudinal direction of the inner surface of at least one of the first arm 2 or the second arm 3, the structure relating to the C-shape area of ​​the first arm 2 being larger than the C-shape area of ​​the second arm 3, the first arm 2 being fixed to the fixing device 2a, and the structure relating to the fixing device 2a being provided with a base 11, and the structures relating to the second convex portions 8a, 8b formed at the end L of the upper opening portion in the longitudinal direction of the first arm 2 and the second arm 3, and the third convex portions 9a, 9b formed at the end m of the lower opening portion in the longitudinal direction of the first arm 2 and the second arm 3 are similar.

[0053] Figure 4 is a cross-sectional view illustrating the case where the fourth convex portion 20 of this embodiment and the fall prevention member 21 that is integrated with the fourth convex portion are not attached when the puncture aid is in an open state; when the first piece 2 and the second piece 3 engage after the arm is placed on the puncture aid 1, this will not happen if the puncture aid is used in the normal way, but as an added safety consideration, Figure 4 shows an example of what to do in the unlikely event that skin falls out of the second open portion.

[0054] As shown in Figure 4, in order to prevent the skin from falling into the second opening, Figures 5a, 6, and 7a show the puncture aid in an open state, and Figures 5b and 7b show the puncture aid when the moving mechanism is moved to use the puncture aid, which show in cross-sectional and oblique views that the fourth convex portion 20 and the fall prevention member 21 that is integrated with the fourth convex portion are provided between the first and second pieces.

[0055] Figure 7a shows the puncture aid in an open state, and Figure 7b shows the puncture aid 1 when the moving mechanism is moved when in use. These are cross-sectional views illustrating the fourth convex portion 20 and the fall prevention member 21 that is integrated with the fourth convex portion in this embodiment, and the cross-sectional views show the effect of the fourth convex portion 20 and the fall prevention member 21 that is integrated with the fourth convex portion when the arm is inserted into the puncture aid 1, preventing the skin from dripping into the second open portion.

[0056] Figures 5b and 7b are cross-sectional views illustrating the fourth convex portion 20 of this embodiment and the fall prevention material 21 that is integrated with the fourth convex portion. After the arm is placed on the puncture aid 1, when the first piece 2 and the second piece 3 engage with each other by the moving mechanism, the fourth convex portion 20 and the fall prevention material 21 that is integrated with the fourth convex portion are made of a soft material, and the cross-sectional views show a structure that can be deformed into a shape almost identical to that of the puncture aid 1.

[0057] FIG. 7b is a cross-sectional view illustrating the fourth convex portion 20 of this embodiment and the fall prevention member 21 integrated with the fourth convex portion when the moving mechanism is moved when the puncture assisting device 1 is used. FIG. 7b shows the effect that, due to the provision of the fourth convex portion, when the ultrasonic device g and the needle h apply pressure i to the muscle c, the blood vessel d, and the epidermis e, the fourth convex portion 20 and the fall prevention member 21 integrated with the fourth convex portion apply pressure x to the muscle c, the blood vessel d, and the epidermis e, which is greater than the pressure k when the first convex portion 7 is used alone, and the stress j that automatically moves downward and diagonally left and right of the blood vessel d can be fixed.

[0058] In addition, in the present embodiment shown in FIG. 7b, the effect and structure of the fourth convex portion 20 and the fall prevention member 21 integrated with the fourth convex portion and worn on the patient's arm has been described, but it is not limited to this case. The structure of the fourth convex portion 20 and the fall prevention member 21 integrated with the fourth convex portion can be modified to a structure integrated with the existing first convex portion, and further, it can be modified to a fourth convex portion 40 shown in FIGS. 8 and 9 in which the fall prevention member 21 integrated with the fourth convex portion 20 is integrated with the first arm portion 2, and similar effects can be obtained. In addition, various modifications are possible within the scope of the present invention. Also,

[0059] Next, the hand rests 30a and 30b, the cord holder 33, and the fourth protrusion 40 according to another embodiment of the present invention will be described in detail with reference to Figures 8 and 9. The same reference numerals as in Figures 5a, 5b, 6, 7a, 7b, 8a, and 8b will be used for the description. In addition, the structures of the embodiments described so far are basically the same.

[0060] The hand rests 30a, 30b are provided at the distal ends of the fixing device 2a and the arm 3a, and the hand rests 30a, 30b and the epidermis e, which is used to view the patient's upper arm, can be positioned in approximately the same position. This allows the ultrasound device g held by the surgeon to be placed vertically on the patient's arm, reducing misalignment of the ultrasound image being observed. The puncture assist device also has the feature that the hand rests 30a, 30b can stabilize the hand holding the ultrasound device g when operating the ultrasound device g up, down, left, and right.

[0061] Next, we will explain the fourth convex portion 40. The fourth convex portion 40 has a hollow structure with a core material in the center, and is harder than the fourth convex portion 20, so that it is more likely to apply pressure to the upper arm.

[0062] The function of the fourth convex portion 40 is generally similar to that of the fourth convex portion 20 shown in Figures 5a, 5b, 6, 7a, and 7b, and further increases the pressure applied to the deep part of the upper arm where the epidermis e, subcutaneous tissue, and muscle c are located, and can effectively fix the movement of the blood vessel d by reducing the stress that causes the blood vessel d to move downward or diagonally left and right, as described in Patent Documents 2 and 3.

[0063] Furthermore, even if the fourth protrusion 40 is integrated with the fall prevention member 21, the function of preventing the phenomenon z of the skin dropping into the second opening b remains unchanged. On the other hand, the increased strength of supporting the arm reduces the risk of breakage.

[0064] Furthermore, since the fourth convex portion 40 is integrated with the fall prevention member 21, the number of parts of the puncture assisting tool 1 can be reduced, and costs can be reduced.

[0065] Next, we will explain the cord holder 33 provided in Figures 8 and 9. The cord holder 33 is provided to prevent the echo cord 31 from hitting the surgeon's arm during operation of the ultrasound device g, which could interfere with ultrasound operation, and the cord holder 33 can suppress movement of the echo cord 31.

[0066] In addition, although the cord hook 33 is provided on the slide rail 4 in the embodiment, it is not limited to this and its position can be adjusted, and it may be provided on at least one of the puncture assisting devices 1. [Explanation of symbols]

[0067] 1 Puncture aid 2 First piece 2a Fixture 3 Second piece 3a Arm 4. Sly Rail 5 Detachable stopper 6 Slide arm protrusion 7 First convex part 8a Second convex part 8b Second convex part 9a Third convex part 9b Third convex part 10a First recess 10b First recess 11 First arm stand 12 Arm base recess 20 Fourth convex part 21 Fall prevention material 30a hand stand 30b hand stand 31 Echo Code 32 Cord holder 40 Fourth convex part a First opening b. Second opening c muscle d Blood vessels e epidermis f. Humerus g Ultrasonic device h needle i Ultrasound device and needle pressure j Automatic movement of blood vessels due to pressure from the ultrasound device and needle k Pressure from the puncture aid L Upper open part tip m Tip of lower open part n Surgeon's side o Patient side z Skin shedding phenomenon x Pressing force from the fourth convex portion and the fall prevention material that is integrated with the fourth convex portion

Claims

1. A puncture aid consisting of a first piece and a second piece with an elastic deformation function that can be fitted onto the upper arm, characterized in that the puncture aid has a fixing device that fixes the first piece, an arm that fixes the second piece, a moving mechanism that allows the second piece to move forward and backward relative to the first piece, and a hand rest on at least one of the fixing device or the arm.

2. 2. The puncture assisting device according to claim 1, further comprising a cord holder for fixing or supporting the ultrasound cord.

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