Support stand and vascular puncture device

Abstract

To provide a support table in which puncture position deviation can be suppressed, a drape can be easily arranged in between a body and the support table, and a state where a body side is set to a clean field and a support table side is set to an unclean field can be easily maintained, and also provide a blood vessel puncture apparatus.SOLUTION: In a blood vessel puncture apparatus 10, a support table 30 can support a body 20 including: an imaging part 40 capable of acquiring a cross-sectional image of an arm A by contacting with a skin surface of the arm A of a human body; a drive part 60 that moves a puncture needle; and a control part 70 capable of controlling movement of the drive part 60. The support table 30 includes a holding part 80 capable of holding the arm A, is capable of supporting the body 20, and is capable of being separated from the body 20.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a support stand capable of supporting a main body that can detect the position of a blood vessel from an image acquired by an ultrasound device and puncture the blood vessel, and to a blood vessel puncture device. [Background technology]

[0002] To secure an access route to a blood vessel for drug administration or intravascular treatment, vascular puncture is performed by inserting a flexible outer tube into the human body over an inner needle with a sharp tip. The outer tube is inserted into the blood vessel together with the inner needle, and then the inner needle is removed, securing the access route. During vascular puncture, the surgeon cannot visually observe the blood vessel from the skin surface, so the location of the blood vessel is estimated based on standard knowledge of the blood vessel course and skills such as palpation of vascular pulsation.

[0003] In recent years, devices that automatically perform vascular puncture have become available (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] U.S. Patent No. 9,999,440 Summary of the Invention [Problem to be solved by the invention]

[0005] The device described in Patent Document 1 has a base that can support the puncture robot, but this base does not have the function of holding the puncture arm. As a result, the puncture position is easily shifted during puncture. Therefore, it is difficult to automatically puncture the patient's desired position with high accuracy.

[0006] In a puncture procedure, the puncture device and the part of the arm to be punctured are placed in a clean area, and the rest of the area is placed in an unclean area. Typically, the clean area and the unclean area are separated by a drape. In a puncture procedure, it is desirable to maintain the relationship between the clean area and the unclean area until the puncture is completed.

[0007] The present invention has been made to solve the above-mentioned problems, and aims to provide a support base and a vascular puncture device that can prevent the puncture position from shifting, can easily place a drape between the main body and the support base, and can easily maintain the main body side as a clean area and the support base side as an unclean area until the puncture is completed. [Means for solving the problem]

[0008] The support stand of the present invention, which achieves the above-mentioned object, is capable of supporting a main body having an imaging unit that can contact the skin surface of a human arm to obtain a cross-sectional image of the arm, a drive unit that moves a puncture needle, and a control unit that can control the movement of the drive unit, and is characterized by having a holding unit that can hold the arm, is capable of supporting the main body, and is detachable from the main body. [Effects of the Invention]

[0009] The support base configured as described above can hold the arm in the holding section, preventing the puncture position from shifting. Furthermore, because the support base is detachable from the main body, a drape can be easily placed between the main body and the support base, and the main body side can be easily maintained as a clean field and the support base side as an unclean field until the puncture is completed. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a perspective view of a blood vessel puncture device according to an embodiment of the present invention. [Figure 2] FIG. 2 is a side view of the blood vessel puncture device of the present embodiment. [Figure 3] FIG. 3 is a cross-sectional view taken along line BB in FIG. 2. [Figure 4] 3 is a front view of the support base as seen from the arrow C in FIG. 2. [Figure 5] FIG. 10 is a side view of a blood vessel puncture device according to a first modified example. [Figure 6] FIG. 10 is a side view of a blood vessel puncture device according to a second modified example. [Figure 7] FIG. 10 is a cross-sectional view of a blood vessel puncture device according to a third modified example. [Figure 8] 10A and 10B are diagrams showing a blood vessel puncture device according to a fourth modified example, in which (A) is a perspective view showing a part of the drive unit, and (B) is a cross-sectional view showing the connection part between the support base and the main body. [Figure 9] 10A and 10B are views showing a blood vessel puncture device according to a fifth modified example, in which (A) is a perspective view showing a part of the drive unit, and (B) is a cross-sectional view showing the connection part between the support base and the main body. [Figure 10] 10A and 10B are views showing a blood vessel puncture device according to a sixth modified example, in which (A) is a perspective view showing a part of the drive unit, and (B) is a cross-sectional view showing the connection part between the support base and the main body. [Figure 11] FIG. 13 is a side view showing the holding part of a blood vessel puncture device according to a seventh modified example. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the dimensional proportions in the drawings may be exaggerated for the sake of explanation and may differ from the actual proportions.

[0012] The vascular puncture device 10 according to an embodiment of the present invention is used to puncture the arm A of a human body, acquires a cross-sectional image of the arm A, detects the position of the blood vessel to be punctured, and automatically punctures that blood vessel.

[0013] 1 to 4, vascular puncture device 10 includes a main body 20 that automatically punctures a blood vessel, and a support base 30 that overlaps main body 20 in the height direction Z, is positioned below main body 20, and supports main body 20. Height direction Z is the direction perpendicular to the horizontal surface when vascular puncture device 10 is placed on the horizontal surface. Main body 20 includes an upper frame 21, an imaging unit 40 that contacts the skin surface to acquire cross-sectional images of the human body, a puncturing unit 50 that performs the puncturing, a driving unit 60 that moves puncturing unit 50 relative to imaging unit 40 (or upper frame 21), a control unit 70 that performs image analysis of the cross-sectional images and controls driving unit 60, and a display unit 90 that can display the cross-sectional images.

[0014] The imaging unit 40 is fixed to the upper frame 21 and has a probe 41 at its lower end that generates and transmits ultrasonic waves and receives ultrasonic waves (echoes) reflected from within the living body. The probe 41 is elongated in a width direction Y, which is perpendicular to a length direction X corresponding to the extension direction of the arm A of the human body placed in the vascular puncture device 10, and can obtain cross-sectional images perpendicular to the axial direction of the blood vessels inside the human body. The length direction X and the width direction Y are perpendicular to each other and perpendicular to the height direction Z. The imaging unit 40 includes a probe driver that moves the probe 41 in the height direction Z. Adjusting the distance between the probe 40 and the arm A using the probe driver can capture images with less noise and prevent deformation of the skin and blood vessels due to excessive contact. The probe driver may be located inside the imaging unit 40, or it may be located between the upper frame 21 and the imaging unit 40 to move the entire imaging unit 40.

[0015] Upper frame 21 is formed in a generally arch-like shape that convexes upward when viewed in length direction X. Upper frame 21 has two upper walls 22 formed on both sides in width direction Y, top surface 23 connecting two upper walls 22, and opening 24 in which imaging unit 40 and puncture unit 50 are disposed. Upper frame 21 is formed from, for example, a hard resin material.

[0016] Each upper wall 22 has a main body connecting surface 25 at its lower end. Each main body connecting surface 25 has at least one protrusion 26 as a connecting portion that can be connected to the support base 30. In this embodiment, each main body connecting surface 25 has one protrusion 26.

[0017] A display unit 90 that displays an image captured by the imaging unit 40 is disposed on the surface of the top surface 23 facing upward. A gripping hole 27 is formed on the surface of the top surface 23 on the central side in the longitudinal direction X of the upper frame 21 (the side closer to the shoulder of the arm A) toward the peripheral side in the longitudinal direction X (the side closer to the fingertips of the arm A). The gripping hole 27 can be used by a surgeon to insert his / her hand and lift the main body 20. The gripping hole 27 extends from the central side of the top surface 23 toward the center of gravity of the main body 20. Note that the gripping hole 27 may or may not reach the center of gravity of the main body 20. By forming the gripping hole 27 close to the center of gravity, the surgeon can easily lift the main body 20 with one hand without dropping it.

[0018] Opening 24 is formed in a concave shape when viewed from above on the distal side of upper frame 21 in length direction X. That is, opening 24 is formed in upper frame 21 by forming top surface portion 23 shorter on the distal side in length direction X than upper wall 22. Opening 24 is located on the distal side of top surface portion 23. Arm A, which is imaged by imaging unit 40 and punctured by puncturing unit 50, is exposed from opening 24. Imaging unit 40 is connected to opening 24. Imaging unit 40 may be detachable from opening 24 or may not be detachable.

[0019] 1 and 2, the puncture unit 50 includes a metal inner needle 51 having a sharp needle tip 53 formed at its tip, and a flexible tubular outer cylinder 52 arranged to cover the outer surface of the inner needle 51. When the outer cylinder 52 is placed over the outside of the inner needle 51, the needle tip 53 of the inner needle 51 protrudes from the outer cylinder 52. The inner needle 51 and the outer cylinder 52 are detachable from a needle holding unit 61 of a drive unit 60.

[0020] The drive unit 60 is a drive source that is controlled by the control unit 70 and changes the position and / or angle of the puncturing unit 50 to automatically adjust the puncturing position and perform the puncturing operation. The drive unit 60 is connected to the imaging unit 40 or the upper frame 21 and is disposed in the opening 24. The drive unit 60 has a mechanism for tilting the entire puncturing unit 50 relative to the upper frame 21, a mechanism for moving the entire puncturing unit 50 in the width direction, a mechanism for moving the puncturing unit 50 up and down, a mechanism for moving the inner needle 51 forward and backward in the puncturing direction, and a mechanism for moving the outer tube 52 forward and backward along the inner needle 51. The drive unit 60 is configured by combining, for example, a rotary drive source such as a motor, a structure for converting the rotary motion of the rotary drive source into linear motion (e.g., a feed screw mechanism), and a structure for changing the angle (e.g., a hinge), but the configuration is not limited thereto. The drive unit 60 has a needle holding unit 61 that detachably holds the inner needle 51 and the outer cylinder 52 .

[0021] The control unit 70 can receive image information from the probe 41 of the imaging unit 40 and form a cross-sectional image. Furthermore, the control unit 70 can display the obtained cross-sectional image on the display unit 90. The control unit 70 is physically configured to include a memory circuit and an arithmetic circuit. The memory circuit can store programs and various parameters. The arithmetic circuit can perform arithmetic processing.

[0022] The control unit 70 may be disposed in the upper frame 21, or may be disposed in the imaging unit 40 or the drive unit 60. Alternatively, the control unit 70 may be configured as a separate unit from the main body 20.

[0023] The control unit 70 can identify the position of the blood vessel in the image by analyzing the acquired cross-sectional image. Furthermore, the control unit 70 can detect the relative position of the inner needle 51 with respect to the imaging unit 40 by analyzing the image. Because the outer tube 52 is made of resin, it cannot be detected by ultrasound. However, if the outer tube 52 is made of resin containing metal, for example, it can be detected by ultrasound, and the control unit 70 can detect the relative position of the outer tube 52 with respect to the imaging unit 40. Furthermore, the control unit 70 can display the cross-sectional image on the display unit 90 by analyzing the acquired cross-sectional image. Furthermore, the control unit 70 controls the drive unit 60 to adjust the position and angle of the puncture unit 50, allowing automatic puncture by the inner needle 51 and outer tube 52 at the desired position and angle.

[0024] As shown in Figures 1 to 3, display unit 90 is a monitor or the like that can display a cross-sectional image. Display unit 90 is preferably placed near puncture unit 50, which performs the puncture. Display unit 90 is placed, for example, on the upward-facing surface of top surface 23 adjacent to opening 24, where puncture unit 50 is placed. This allows the surgeon to visually check the cross-sectional image of the blood vessel on display unit 90, while also visually checking the skin of arm A that will be punctured. Note that display unit 90 may also be placed away from main body 20 and support base 30.

[0025] As shown in Figures 1 to 4, the support base 30 has a lower frame 31 and a holding portion 80 that holds the arm A. The lower frame 31 is formed in a generally arch shape that is convex downward when viewed in the longitudinal direction X. The lower frame 31 has two lower walls 32 formed on both sides in the width direction Y, and a bottom surface portion 33 that connects the two lower walls 32. The lower frame 31 is formed, for example, from a hard resin material.

[0026] Each lower wall 32 has a support base connecting surface 34 at its upper end. The support base connecting surface 34 faces the main body connecting surface 25 of the main body 20 and can support the main body connecting surface 25. A drape 100 can be sandwiched between the support base connecting surface 34 and the main body connecting surface 25. The drape 100 is a flexible sheet-like member that can be used to separate a clean area from an unclean area. The configuration of the drape 100 is not particularly limited as long as it is flexible and sheet-like. Each support base connecting surface 34 has at least one recess 35 as a connecting portion that can be connected to the main body 20. In this embodiment, each support base connecting surface 34 has multiple recesses 35 arranged at predetermined intervals along the length direction X. The recesses 35 may or may not penetrate the support base connecting surface 34. The protrusions 26 of the main body connecting surface 25 can be fitted into each recess 35 via the drape 100. Therefore, when the protrusions 26 are directly fitted to the recesses 35 without the drape 100, a gap is formed between the protrusions 26 and the recesses 35. A viewing area 36 that can be viewed by the surgeon through the drape 100 is formed near each recess 35 or in the recessed portion of the recess 35. The viewing area 36 is, for example, an illuminating lighting unit such as an LED. A power supply and cable (not shown) that supply power to the viewing area 36 are disposed on the support base 30. Because the surgeon can see the viewing area 36 that emits light through the drape 100, the surgeon can grasp the position of the recess 35 on the support base 30 covered by the drape 100 and easily fit the protrusions 26 to the recesses 35. Furthermore, if the viewing area 36 is located in the recessed portion of the recess 35, when the surgeon fits the protrusions 26 to the recess 35, the protrusions 26 will cover the viewing area 36 located in the recessed portion of the recess 35. As a result, the light emitted from the visualization portion 36 becomes invisible to the surgeon, allowing the surgeon to recognize that the connection has been completed. Note that, in this embodiment, the convex portion 26 is formed on the main body 20 and the concave portion 35 is formed on the support base 30 as the connecting portion, but a concave portion may be formed on the main body 20 and a convex portion may be formed on the support base 30. In this case, the visualization portion may be located on the protruding portion of the convex portion of the support base 30. As a result, when the surgeon connects the convex portion to the concave portion, the concave portion covers the visualization portion located on the protruding portion of the convex portion. As a result, the light emitted from the visualization portion becomes invisible to the surgeon, allowing the surgeon to recognize that the connection has been completed.

[0027] The bottom surface portion 33 has a bottom surface 37 that contacts an operating table or the like, and an upward-facing support surface 38. A holding portion 80 that holds the arm A is fixed to the support surface 38.

[0028] As shown in FIGS. 2 to 4, the holding unit 80 has a holding surface 81 on its upper surface that can hold the arm A. The holding surface 81 is grooved to fit the shape of the arm A so that the arm A can be stably held along the longitudinal direction X. The holding surface 81 has a first holding surface 82 that can hold the elbow side (central side) of the arm A and a second holding surface 83 that can hold the wrist side (distal side) of the arm A. The height from the bottom surface 37 of the support base 30 to the second holding surface 83 is preferably higher than the height from the bottom surface 37 to the first holding surface 82. The height of the holding surface 81 from the bottom surface 37 gradually increases from the elbow side (central side) to the wrist side (distal side) in the longitudinal direction X. This allows the arm A to be stably held by the holding unit 80 with the palm side of the wrist bent upward and the skin of the arm A stretched (see FIG. 2). The height of the holding surface 81 from the bottom surface 37 gradually increases toward the puncturing unit 50 of the main body 20 in the longitudinal direction X. That is, the holding surface 81 is inclined with respect to the bottom surface 37. This allows the puncturing unit 50 of the main body 20 to contact the skin of the arm A at the contact position while stretching the skin. This prevents the puncturing position from shifting due to the skin shifting during puncturing. The holding unit 80 is preferably flexible. This allows the holding unit 80 to deform according to the shape of the arm A, thereby stably holding the arm A and reducing pain to the patient. The holding unit 80 is formed, for example, from a flexible porous resin material. The holding unit 80 does not have to be flexible and may be integral with the lower frame 31.

[0029] 4, it is preferable that the height H1 from the bottom surface 37 to the top surface of the support base 30, i.e., the height H1 to the support base connecting surface 34, does not exceed the height H2 from the bottom surface 37 to the highest point of the arm A held by the holding part 80. If the height H2 exceeds the height H1, the puncturing position of the arm A will be located below the support base connecting surface 34 that supports the drape 100, reducing the efficiency of the puncturing operation. Since the thickness of a typical human arm A from the back side to the palm side is about 50 mm, it is preferable that the height H3 from the lowest point of the second holding surface 83, which is formed higher among the holding surfaces 81, to the support base connecting surface 34 be 50 mm or less.

[0030] Next, a method of using the vascular puncture device 10 according to this embodiment will be described. First, the surgeon places the support table 30 on an unclean field such as an operating table, and places the patient's arm A on the holding surface 81. At this time, the arm A is placed on the holding surface 81 with the palm side of the wrist bent upward. This prevents the skin from shifting and the puncture position from shifting during the subsequent puncture.

[0031] Next, as shown in FIGS. 2 and 3, the surgeon covers the support base 30 and arm A with a sterilized drape 100. At this time, the hole in the drape 100 is aligned with the site on arm A where puncture will be performed. This exposes the site on arm A where puncture will be performed from the drape 100. The drape 100 then covers the support base connecting surfaces 34 on both sides of the support base 30. This makes it possible to maintain the area below the drape 100, including the support base 30, as an unclean area, and the area above the drape 100 as a clean area.

[0032] Next, the surgeon illuminates the visualization portion 36 of the support base 30 and grasps the position of the recessed portion 35 by the light transmitted through the drape 100. Subsequently, the surgeon selects a recessed portion 35 into which the protruding portion 26 of the main body 20 is to be fitted from the multiple recessed portions 35 lined up in the length direction X, and fits the protruding portion 26 into the recessed portion 35. This allows the surgeon to grasp the position of the recessed portion 35 by the visualization portion 36 of the support base 30, and therefore the protruding portion 26 of the main body 20 can be easily and reliably fitted (coupled) into the recessed portion 35 of the support base 30. Furthermore, because the surgeon can select the recessed portion 35 into which the protruding portion 26 is to be fitted, the surgeon can easily adjust the position of the main body 20 in the length direction X relative to the support base 30 to a desired position for the catheter procedure.

[0033] A gap is provided between the recessed portion 35 and the protruding portion 26, so that the protruding portion 26 can be fitted into the recessed portion 35 while the drape 100 is sandwiched between the support base connecting surface 34 and the main body connecting surface 25. The surgeon can easily place the arm A and the drape 100 on the vascular puncture device 10 by simply sandwiching the drape 100 between the support base 30 and the main body 20 without damaging or removing the drape 100.

[0034] The surgeon then activates the vascular puncture device 10. This causes the control unit 70 to control the drive unit 60 and the imaging unit 40, automatically puncturing the blood vessel. The vascular puncture device 10 may also have a button or microphone for performing the puncture. When the surgeon presses a button or gives voice instructions via the microphone, the control unit 70 can activate the drive unit 60 to perform the puncture. When puncturing the blood vessel, the surgeon can visually check the cross-sectional image of the blood vessel on the display unit 90 and visually inspect the skin of arm A to be punctured. This allows the surgeon to easily confirm whether the blood vessel has been punctured at the intended location.

[0035] The drive unit 60 controlled by the control unit 70 causes the tip of the inner needle 51 to reach the inside of the blood vessel together with the outer tube 52. Thereafter, the drive unit 60 retracts the inner needle 51, leaving the tip of the outer tube 52 inside the blood vessel, and pulls it out of the outer tube 52. Note that the inner needle 51 may be retracted manually by the surgeon.

[0036] Once the vascular puncture device 10 has completed vascular puncture, the surgeon removes either or both of the inner needle 51 and the outer tube 52 from the drive unit 60. Next, the surgeon grasps the gripping hole 27 to lift the main body 20 and detaches and removes it from the support base 30. At this time, because either or both of the inner needle 51 and the outer tube 52 removed from the drive unit 60 are positioned in the opening 24 on the distal side of the main body 20, the main body 20 can be removed without the inner needle 51 and / or the outer tube 52 getting caught on the main body 20. This allows the outer tube 52 to remain inserted in the blood vessel. The main body 20 can be removed with little impact on the drape 100. This allows the relationship between the clean and unclean fields to be maintained when removing the main body 20. After removing the main body 20, the surgeon can perform the catheterization procedure via the outer tube 52.

[0037] As described above, the support base 30 in this embodiment is capable of supporting the main body 20, which includes the imaging unit 40 that can contact the skin surface of the arm A of a human body to acquire a cross-sectional image of the arm A, the drive unit 60 that moves the puncture needle (inner needle 51), and the control unit 70 that can control the movement of the drive unit 60. The support base 30 is equipped with a holding unit 80 that can hold the arm A, and is capable of supporting and detaching from the main body 20. This allows the support base 30 to hold the arm A on the holding unit 80, thereby preventing the puncture position from shifting. Therefore, the support base 30 can assist the surgeon in inserting the puncture needle (inner needle 51) into the desired puncture position on the human body with high accuracy. Furthermore, because the support base 30 is detachable from the main body 20, the drape 100 can be easily placed between the main body 20 and the support base 30, and the state in which the main body 20 side is a clean field and the support base 30 side is an unclean field can be easily maintained until the puncture is completed.

[0038] The support base 30 has a connecting portion for connecting to the main body 20. This allows the main body 20 and the support base 30 to be connected in an appropriate positional relationship. The structure of the connecting portion is not particularly limited as long as it allows the main body 20 and the support base 30 to be connected with the drape 100 sandwiched between them.

[0039] The connecting portion of the support base 30 has a convex portion or a concave portion 35 that can be fitted into a concave portion or a convex portion 26 provided on the main body 20, and when the convex portion 26 directly fits into the concave portion 35, a gap is formed between the convex portion 26 and the concave portion 35. This allows the convex portion 26 to be fitted into the concave portion 35 via the drape 100 while sandwiching the drape 100 in the gap between the convex portion 26 and the concave portion 35.

[0040] The support base 30 may have a visible viewing section 36 at the connection section of the support base 30. This makes the viewing section 30 invisible to the surgeon, so that the surgeon can reliably recognize that the main body 20 has been connected to the connection section of the support base 30.

[0041] The support base 30 may have a visible viewing portion 36 in the recess 35 or protrusion of the support base 30. This allows the surgeon to reliably recognize that the main body 20 is connected to the support base 30, because the viewing portion 30 becomes invisible when the protrusion 26 of the main body 20 fits into the recess 35 of the support base 30.

[0042] The support base 30 has a plurality of connecting portions (for example, recesses 35) at different positions, which allows the main body 20 and the support base 30 to be connected at different positions.

[0043] Holding unit 80 has a first holding surface 82 capable of holding the elbow side of arm A and a second holding surface 83 capable of holding the wrist side of arm A, and the height from bottom surface 37 of support base 30 to second holding surface 83 is higher than the height from bottom surface 37 to first holding surface 82. This allows arm A to be stably held by holding unit 80 with the palm side of the wrist bent upward to stretch the skin of arm A. This makes it possible to prevent the skin from shifting and the puncture position from shifting when puncturing.

[0044] The holding portion 80 is flexible, which allows the holding portion 80 to deform according to the shape of the arm A, thereby enabling the arm A to be stably held and reducing pain to the patient.

[0045] The holding part 80 has a holding surface 81 that is inclined relative to the bottom surface 37 of the support base 30. This allows the arm A to be placed on the holding surface 81 with the wrist side of the arm A higher than the elbow side, and the arm A can be stably held on the holding surface 81.

[0046] The vascular puncture device 10 of this embodiment includes a main body 20 having an imaging unit 40 that can contact the skin surface of a human arm A to acquire a cross-sectional image of the arm A, a drive unit 60 that moves the puncture needle (inner needle 51), and a control unit 70 that controls the movement of the drive unit 60, and a support base 30 that is detachable from the main body 20 and has a holder 80 that can hold the arm A. This allows the vascular puncture device 10 to hold the arm A in the holder 80 of the support base 30, thereby preventing the puncture position from shifting. This allows the vascular puncture device 10 to insert the puncture needle (inner needle 51) into the desired puncture position on the human body with high accuracy. Furthermore, because the support base 30 is detachable from the main body 20, a drape 100 can be easily placed between the main body 20 and the support base 30, and the state in which the main body 20 side is a clean field and the support base 30 side is an unclean field can be easily maintained until the puncture is completed.

[0047] The main body 20 has a display unit 90 that can display a cross-sectional image captured by the imaging unit 40. This allows the surgeon to check both the part of arm A being punctured and the display unit 90 without significantly changing his or her line of sight, improving operability during puncturing.

[0048] The present invention is not limited to the above-described embodiments, and various modifications can be made by those skilled in the art within the technical spirit of the present invention. For example, the connecting portions arranged on the main body 20 and / or the support base 30 are not limited to matable recesses or protrusions, but may be steps, for example. Other steps or corners of opposing members can be fitted into the steps.

[0049] 5, the recess 35 of the support base 30 may be formed in a groove-like or slit-like shape that is long in the longitudinal direction X. This allows the protrusion 26 of the main body 20 to slide along the recess 35. This allows the main body 20 to be connected to the support base 30 at any position in the longitudinal direction X.

[0050] 6, the connecting parts may be connectable by magnetic force. The first connecting part 29 arranged on the main body 20 and the second connecting part 39 arranged on the support base 30 are both made of ferromagnetic materials, and at least one of them is magnetic, so that they can attract each other. Note that as long as one of the first connecting part 29 or the second connecting part 39 is made of a magnetic ferromagnetic material, the other may or may not be magnetic.

[0051] 7, the length of the support base 30 and / or the main body 20 in the width direction Y may be changeable. The support base 30 and / or the main body 20 may have, for example, a sliding mechanism so that the length in the width direction Y can be changed. This allows the support base 30 and / or the main body 20 to be changed to an appropriate width to match the width of the arm A. Therefore, the vascular puncture device 10 can be used regardless of the width of the arm A.

[0052] 8 , the blood vessel puncture device 10 may also include a stopper mechanism 110 that prevents the main body 20 from being removed from the support base 30 while the inner needle 51 is inserted into a blood vessel. The stopper mechanism 110 includes a detection unit 111 that detects the presence or absence of the inner needle 51 near the puncture part 50, and a locking mechanism 112 that irremovably connects the support base 30 and the main body 20. The detection unit 111 is, for example, a proximity sensor or a displacement sensor that is disposed in the needle holding unit 61 that holds the puncture part 50. The locking mechanism 112 can protrude from the protrusion 26 of the main body 20 in a direction intersecting with the height direction Z by a drive source such as a motor controlled by the control unit 70. By protruding, the locking mechanism 112 can penetrate the drape 100 and become hooked on an engagement portion 113 formed in the recess 35 of the support base 30. Note that the locking mechanism 112 can also be hooked on the engagement portion 113 without penetrating the drape 100. When the detection unit 111 detects the inner needle 51, the control unit 70 engages the locking mechanism 112 with the engagement unit 113 to prevent the main body 20 from being removed from the support base 30, and when the detection unit 111 cannot detect the inner needle 51, the control unit 70 activates the locking mechanism 112 to disengage it from the engagement unit 113, allowing the main body 20 to be removed from the support base 30.

[0053] 9 , the stopper mechanism 110 may include a first magnetic body 114 that is a ferromagnetic body moved by a drive source such as a motor controlled by the control unit 70, and a second magnetic body 115 that is a ferromagnetic body that can attract the first magnetic body 114 by magnetic force. The first magnetic body 114 and the second magnetic body 115 are both ferromagnetic bodies, and at least one of them is magnetic, so that they can attract each other. The first magnetic body 114 is disposed on the main body 20, and the second magnetic body 115 is disposed on the support base 30. When the detection unit 111 detects the inner needle 51, the control unit 70 moves the first magnetic body 114 close to the second magnetic body 115 to prevent the main body 20 and the support base 30 from being detached by magnetic force. When the detection unit 111 cannot detect the inner needle 51, the control unit 70 moves the first magnetic body 114 away from the second magnetic body 115 to allow the main body 20 to be detached from the support base 30.

[0054] It should be noted that detection unit 111 of stopper mechanism 110, which prevents main body 20 from being removed from support base 30, does not necessarily output an electrical signal, but may instead be a mechanical mechanism. For example, in a structure in which needle holding unit 61 that holds puncturing unit 50 can be removed together with inner needle 51, as in the sixth modified example shown in FIG. 10 , detection unit 111 has at least one component 116 that connects needle holding unit 61 and locking mechanism 112. When needle holding unit 61 is removed from upper frame 21, these components 116 move using the principle of leverage or the like, actuating locking mechanism 112 and disengaging it from engaging portion 113, making main body 20 removable from support base 30.

[0055] 11 , as a mechanism for bending arm A, holding unit 80 may have an expandable and contractible balloon 84 on the surface that holds arm A. As a mechanism for bending arm A, holding unit 80 may have looped string 85 that can be hooked onto the palm of the hand, and string driver 86 that can move string 85. [Explanation of symbols]

[0056] 10 Vascular Puncture Device 20 Main Unit 24 Opening 26 Convex part (connecting part) 29 1st connection part 30 Support stand 35 Recess (connection part) 37 bottom 39 2nd connection part 40 Imaging unit 50 Puncture site 51 Inner needle (puncture needle) 52 outer cylinder 60 Drive unit 70 Control Unit 80 Holding part 81 Holding surface 82 1st holding surface 83 Second holding surface 90 Display section 100 drapes

Claims

1. A support base capable of supporting a main body having an imaging unit that can contact the skin surface of a human arm to acquire a cross-sectional image of the arm, a driving unit that moves a puncture needle, and a control unit that can control the movement of the driving unit, A support stand comprising a holding portion capable of holding the arm, capable of supporting the main body, and capable of being separated from the main body.

2. The support base according to claim 1 , further comprising a connecting portion for connecting to the main body.

3. The support base according to claim 2, characterized in that the connecting portion of the support base has a convex portion or a concave portion that can be fitted into a concave portion or a convex portion provided on the main body, and when the convex portion directly fits into the concave portion, a gap is formed between the convex portion and the concave portion.

4. The support base according to claim 2 , wherein the connecting portion of the support base has a visible portion that can be seen.

5. The support base according to claim 3 , wherein the recess or the protrusion of the support base has a visible portion that can be seen.

6. The support base according to any one of claims 2 to 5, wherein the support base has a plurality of the connecting portions at different positions.

7. the holding portion has a first holding surface capable of holding an elbow side of the arm and a second holding surface capable of holding a wrist side of the arm, A support base according to any one of claims 1 to 5, characterized in that the height from the bottom surface of the support base to the second holding surface is greater than the height from the bottom surface to the first holding surface.

8. 6. The support base according to claim 1, wherein the holding portion is flexible.

9. The support base according to claim 7 , wherein the holding portion has a holding surface that is inclined relative to the bottom surface of the support base.

10. a main body having an imaging unit that can contact the surface of the skin of a human arm to obtain a cross-sectional image of the arm, a driving unit that moves a puncture needle, and a control unit that can control the movement of the driving unit; A blood vessel puncture device comprising: a support base that has a holding portion capable of holding the arm, is capable of supporting the main body, and is separable from the main body.

11. 11. The blood vessel puncture device according to claim 10, wherein the main body has a display unit capable of displaying a cross-sectional image captured by the imaging unit.

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