Catheter assembly and blood vessel puncturing system

Abstract

A catheter assembly (12) of a blood vessel puncturing system (10) comprises a catheter member (16), a needle member (18), and a guide wire (20). A blade face (40) at a tip section of a needle body (32) has formed therein a tip opening (42) that communicates with a lumen (36) of the needle body (32). A light-emitting part (66) that emits near-infrared light (L2) is provided at a tip section of the guide wire (20). The light-emitting part (66) is positioned, in an initial state, so as to overlap with the tip opening (42) in plan view in which the blade face (40) is seen from a direction orthogonal to the axis of the needle body (32).

Description

Catheter assembly and vascular puncture system

[0001] The present invention relates to a catheter assembly and a vascular puncture system.

[0002] For example, Japanese Patent Laid-Open Publication No. 10-99443 discloses a catheter assembly including a hollow catheter shaft, a hollow needle inserted into the lumen of the catheter shaft, and a guide wire inserted into the lumen of the needle. A tip opening that communicates with the lumen of the needle is formed on the cutting edge of the tip of the needle.

[0003] Generally, in a catheter assembly, it is confirmed that the blade surface of the needle has entered a blood vessel by visually checking for backflow of blood (flashback) through the lumen of the needle. In this case, flashback can be confirmed after a certain time has passed since the blade surface of the needle entered the blood vessel, so it is not possible to immediately know that the blade surface of the needle has entered the blood vessel.

[0004] The present invention aims to solve the above-mentioned problems.

[0005] One aspect of the present invention is a catheter assembly comprising a catheter member having a hollow catheter shaft, a needle member having a hollow needle inserted into the lumen of the catheter shaft, and a guide wire inserted into the lumen of the needle, wherein a blade surface at the tip of the needle is formed with a tip opening that communicates with the lumen of the needle, and the tip of the guide wire is provided with a light-emitting unit that emits near-infrared light, and the light-emitting unit is positioned so as to overlap the tip opening in an initial state when the blade surface is viewed from a direction perpendicular to the axis of the needle.

[0006] Another aspect of the present invention is a vascular puncture system comprising: the above-described catheter assembly; an irradiation unit that irradiates light in the near-infrared region onto the tip of the catheter assembly that has been inserted into a biological site; a light receiving unit that receives light reflected from the biological site and the catheter assembly and the near-infrared light emitted by the light emitting unit to create a received-light image; and an image display unit that displays the received-light image.

[0007] According to the present invention, in the initial state of the catheter assembly, when the blade surface is viewed from a direction perpendicular to the axis of the needle body, the light-emitting unit is positioned so as to overlap the distal end opening. In this case, near-infrared light emitted by the light-emitting unit is guided to the outside of the needle body through the distal end opening, and can be visualized by a received light image created based on the near-infrared light. Furthermore, near-infrared light is absorbed by hemoglobin in the blood flowing through the blood vessel. Therefore, the appearance of the light-emitting unit in the received light image changes before and after the blade surface enters the blood vessel. This allows the user to immediately know that the blade surface has entered the blood vessel.

[0008] FIG. 1 is a schematic diagram of a blood vessel puncture system according to one embodiment of the present invention. FIG. 2 is an exploded perspective view of the catheter assembly of FIG. 1. FIG. 3A is a longitudinal cross-sectional view of the distal end of the catheter assembly of FIG. 1. FIG. 3B is a plan view of the blade surface of the catheter assembly of FIG. 1 viewed from a direction perpendicular to the axis of the needle. FIG. 4 is a first explanatory diagram of a blood vessel puncture procedure using the catheter assembly of FIG. 1. FIG. 5 is a received light image in the state of FIG. 4. FIG. 6 is a second explanatory diagram of a blood vessel puncture procedure using the catheter assembly of FIG. 1. FIG. 7 is a received light image in the state of FIG. 6. FIG. 8 is a third explanatory diagram of a blood vessel puncture procedure using the catheter assembly of FIG. 1. FIG. 9 is a schematic diagram of a catheter assembly according to a modified example.

[0009] 1, a vascular puncture system 10 according to one embodiment of the present invention includes a catheter assembly 12 and a visualization device 14. The catheter assembly 12 is configured as, for example, an indwelling needle for administering an infusion (medicinal solution) into a blood vessel 202 in a living body site 200. However, the catheter assembly 12 is not limited to an indwelling needle for administering an infusion.

[0010] 1 and 2, the catheter assembly 12 includes a catheter member 16, a needle member 18, a guidewire 20, and a wire operating portion 22. The catheter member 16 has a hollow catheter shaft 24 and a catheter hub 26.

[0011] 2, the catheter shaft 24 is flexible. The catheter shaft 24 is a tubular member that can be continuously inserted into a blood vessel 202 (vein or artery) at a living body site 200 (see FIG. 6). The catheter shaft 24 has a lumen 28 that extends along the axial direction over its entire length. The lumen 28 of the catheter shaft 24 communicates with an opening 30 at the tip of the catheter shaft 24.

[0012] The material of which the catheter shaft 24 is made is not particularly limited, but a transparent or translucent resin material, particularly a soft resin material, is preferred. Examples of such materials include fluororesins such as polytetrafluoroethylene (PTFE), ethylene-tetrafluoroethylene copolymer (ETFE), and perfluoroalkoxy fluororesin (PFA), olefin resins such as polyethylene and polypropylene, and mixtures thereof, polyurethane, polyester, polyamide, polyether nylon resin, and mixtures of olefin resins and ethylene-vinyl acetate copolymer.

[0013] The catheter hub 26 is provided at the proximal end of the catheter shaft 24. The catheter hub 26 is formed in a cylindrical shape. The catheter hub 26 is preferably made of a material harder than the catheter shaft 24. The material of the catheter hub 26 is not particularly limited, but suitable examples include thermoplastic resins such as polypropylene, polycarbonate, polyamide, polysulfone, polyarylate, methacrylate-butylene-styrene copolymer, polyurethane, acrylic resin, and ABS resin.

[0014] The needle member 18 includes a hollow needle body 32 and a needle hub 34. The needle body 32 is a tubular member having sufficient rigidity to be inserted into a living body site 200 (see FIG. 6 ). The needle body 32 has a lumen 36 extending along the axial direction over its entire length. In the initial state (assembled state) of the catheter assembly 12, the needle body 32 is inserted through the lumen 28 of the catheter shaft 24 and the lumen 27 of the catheter hub 26 (see FIGS. 1 and 3A ).

[0015] The needle body 32 may be made of a metal material such as stainless steel, aluminum, an aluminum alloy, titanium, or a titanium alloy. The needle body 32 does not transmit but reflects the light L1 from the visualization device 14 (see FIG. 1). The needle body 32 is formed to be sufficiently longer than the catheter shaft 24.

[0016] 3A and 3B, the needle 32 protrudes from the opening 30 of the catheter shaft 24 in the initial state of the catheter assembly 12. The tip of the needle 32 has a blade surface 40 that is inclined with respect to the axis of the needle 32. A tip opening 42 that communicates with the lumen 36 of the needle 32 is formed on the blade surface 40.

[0017] The distal opening 42 includes an opening center portion 44 and an opening base end portion 46. The opening center portion 44 is located at the center of the distal opening 42 in the axial direction of the needle body 32. The opening base end portion 46 is located at the base end of the distal opening 42 in the axial direction of the needle body 32. In other words, the opening base end portion 46 is adjacent to the jaw portion 48 of the blade surface 40 in the distal direction.

[0018] 1 and 2 , the needle hub 34 has a needle fixing portion 50, a tubular portion 52, a movement restricting portion 54, and a port portion 56. The needle fixing portion 50 forms the distal end of the needle hub 34. The proximal end of the needle body 32 is fixed to the needle fixing portion 50. The tubular portion 52 extends along the extension direction of the needle body 32. The distal end of the tubular portion 52 is connected to the needle fixing portion 50. The tubular portion 52 has a lumen 58 that communicates with the lumen 36 of the needle body 32 and opens to the proximal end of the needle hub 34.

[0019] As shown in Figure 1, a piston 70 (described later) of the wire manipulation unit 22 is inserted into the inner cavity 58 of the cylindrical portion 52. The space in the inner cavity 58 of the cylindrical portion 52 further distally than the piston 70 is a flashback chamber 60 where blood flows back when the blade surface 40 of the needle body 32 enters a blood vessel 202 (see Figure 6). The cylindrical portion 52 functions as the manipulation unit of the catheter assembly 12.

[0020] The movement restricting portion 54 restricts the movement of the piston 70 toward the base end. The movement restricting portion 54 is two protrusions 62 protruding radially inward from the inner circumferential surface of the tubular portion 52. The two protrusions 62 are positioned facing each other. The protrusions 62 have a semicircular cross section along the axial direction of the tubular portion 52. The position, size, and shape of the protrusions 62 can be set as appropriate. The movement restricting portion 54 may be one or three or more protrusions 62. Alternatively, the movement restricting portion 54 may be a single protrusion 62 extending in an annular shape on the inner circumferential surface of the tubular portion 52. The movement restricting portion 54 may have any appropriate configuration as long as it is capable of restricting the movement of the piston 70 toward the base end.

[0021] 1 and 2, the port portion 56 is provided at the tip of the tubular portion 52. The port portion 56 is provided with a filter portion 64. The filter portion 64 allows air present in the chamber 60 to flow to the outside of the tubular portion 52, while preventing air from flowing from the outside of the tubular portion 52 into the chamber 60. The filter portion 64 also prevents blood from flowing through.

[0022] The guide wire 20 extends distally from the distal end of the piston 70. The guide wire 20 is a member for guiding the catheter shaft 24 into the blood vessel 202. The core material of the guide wire 20 is made of, for example, a superelastic alloy. The surface of the guide wire 20 is coated with a hydrophilic polymer. The distal end of the guide wire 20 has a flexible structure (for example, a coil) to increase safety in the blood vessel 202. The distal end of the guide wire 20 is formed to be rounded (for example, hemispherical).

[0023] 3A and 3B, a light-emitting unit 66 that emits near-infrared light L2 is provided at the distal end of the guidewire 20. The near-infrared light L2 emitted by the light-emitting unit 66 is received by the visualization device 14 and displayed in a received-light image 82 (see FIG. 1). The length of the light-emitting unit 66 along the extension direction of the guidewire 20 is set to, for example, 0.3 mm or more and 0.5 mm or less. If the length of the light-emitting unit 66 is 0.3 mm or more, the light-emitting unit 66 is easily visible in the received-light image 82. However, the length of the light-emitting unit 66 can be set as appropriate.

[0024] In the initial state of the catheter assembly 12, the light-emitting unit 66 is positioned so as to overlap the distal opening 42 of the needle body 32 in a plan view of the blade surface 40 viewed from a direction perpendicular to the axis of the needle body 32 (in the plan view of FIG. 3B ). Specifically, in the initial state of the catheter assembly 12, the light-emitting unit 66 is positioned further proximal than the opening center 44 of the distal opening 42. In other words, the light-emitting unit 66 is positioned so as to overlap the opening proximal end 46 of the distal opening 42 in the plan view of FIG. 3B . In this case, it is possible to easily determine from the received-light image 82 whether the entire blade surface 40 has been inserted into the blood vessel 202.

[0025] In this embodiment, the tip of the light-emitting unit 66 is located proximally relative to the opening center 44 of the tip opening 42 in the initial state of the catheter assembly 12. The entire light-emitting unit 66 is located in the lumen 36 of the needle body 32. In other words, the light-emitting unit 66 does not protrude from the tip opening 42 to the outside of the needle body 32. This makes it possible to prevent the light-emitting unit 66 from increasing puncture resistance.

[0026] The size, shape, and position of the light-emitting unit 66 can be set as appropriate. In the plan view of Fig. 3B , the light-emitting unit 66 may extend in the axial direction of the needle body 32 so as to overlap the range from the opening center 44 to the opening base end 46 of the distal opening 42. In the initial state, the light-emitting unit 66 may be located distally of the opening center 44 of the distal opening 42. In the plan view of Fig. 3B , the light-emitting unit 66 is preferably located so as to overlap at least the opening base end 46 of the distal opening 42. However, the light-emitting unit 66 may also be located so as not to overlap the opening base end 46 of the distal opening 42.

[0027] The peak wavelength of near-infrared light L2 emitted by light-emitting unit 66 is in a wavelength range that is easily absorbed by hemoglobin in the blood and easily transmits through skin 204. Generally, skin 204 easily transmits wavelengths of 700 nm or more and 1000 nm or less. Furthermore, reduced hemoglobin in blood flowing through veins easily absorbs light with a wavelength around 660 nm. Furthermore, oxygenated hemoglobin in blood flowing through arteries easily absorbs light with a wavelength around 940 nm.

[0028] Therefore, the peak wavelength of the near-infrared light L2 emitted by the light-emitting unit 66 is preferably in the range of 700 nm or more and 1000 nm or less. Furthermore, in the case of a catheter assembly 12 used to puncture a vein (a catheter for venous insertion), the peak wavelength of the near-infrared light L2 emitted by the light-emitting unit 66 is preferably in the range of 700 nm or more and 800 nm or less, and more preferably in the range of 700 nm or more and 750 nm or less. Furthermore, in the case of a catheter assembly 12 used to puncture an artery (a catheter for arterial insertion), the peak wavelength of the near-infrared light L2 emitted by the light-emitting unit 66 is preferably in the range of 800 nm or more and 1000 nm or less, more preferably in the range of 850 nm or more and 950 nm or less, and even more preferably around 940 nm.

[0029] The light-emitting portion 66 is formed by applying a light-emitting material to the distal end of the guide wire 20. Such a light-emitting portion 66 can be easily obtained, for example, by immersing the distal end of the guide wire 20 in a liquid light-emitting material. The light-emitting material is a fluorescent material (near-infrared fluorescent dye) that emits near-infrared light L2 when irradiated with light L1 in the near-infrared region emitted by the visualization device 14. The film thickness of the fluorescent material is set to, for example, about 3 μm. Examples of such fluorescent materials include those described in JP 2014-136115 A.

[0030] The light-emitting material may be a phosphorescent material that emits near-infrared light L2. When using such a phosphorescent material, the light-emitting unit 66 can be made to emit light by irradiating the light-emitting unit 66 with light in advance (before performing the vascular puncture procedure using the vascular puncture system 10).

[0031] 1 and 2 , the wire operating unit 22 is a member for operating the guide wire 20 along the axial direction. The wire operating unit 22 has a piston 70 and a plunger 72. The piston 70 is disposed in the inner cavity 58 of the tubular portion 52. The piston 70 slides in the inner cavity 58 of the tubular portion 52 along the axial direction of the tubular portion 52. The tip end of the plunger 72 is attached to the base end surface of the piston 70. The base end of the plunger 72 protrudes from the base end of the tubular portion 52.

[0032] 1, the visualization device 14 includes an irradiation unit 74, a light receiving unit 76, and an image display unit 78. The irradiation unit 74 and the light receiving unit 76 are located above the biological site 200 (in the direction in which the distal end opening 42 of the needle body 32 faces) (see FIG. 4). The irradiation unit 74 irradiates light L1 onto the biological site 200 (object to be visualized) punctured by the catheter assembly 12. The irradiation unit 74 has a light source 80 that emits light L1 in the near-infrared region.

[0033] The light L1 emitted by the light source 80 preferably has a wavelength in the range of 700 nm to 2500 nm, more preferably in the range of 700 nm to 1400 nm, and even more preferably in the range of 780 nm to 1050 nm. Such near-infrared light L2 is absorbed by hemoglobin in blood.

[0034] The light receiving unit 76 is a camera (image capturing unit) that receives light L1 emitted by the light source 80 that is reflected by the biological part 200, the needle body 32, etc., and near-infrared light L2 emitted by the light emitting unit 66. For example, a CCD camera or the like is used as the light receiving unit 76. The light receiving unit 76 creates a received-light image 82 based on the reflected light and the near-infrared light L2. The image display unit 78 displays the received-light image 82.

[0035] Next, a description will be given of the procedure for puncturing a blood vessel using the blood vessel puncture system 10. In the initial state of the catheter assembly 12, the blade surface 40 faces upward and protrudes distally from the opening 30 of the catheter shaft 24.

[0036] First, the user sets up the visualization device 14. Specifically, as shown in Fig. 4, the irradiation unit 74 and the light receiving unit 76 are positioned above the body part 200 (e.g., a human forearm) to be punctured. Then, the irradiation unit 74 irradiates the body part 200 with light L1, and the distal end of the catheter assembly 12 punctures the body part 200. Note that in Fig. 4, the blade surface 40 does not enter the blood vessel 202.

[0037] As a result, light L1 emitted by the irradiation unit 74 is reflected by the biological part 200 and the needle body 32 and is irradiated onto the light-emitting unit 66. Note that light L1 in the near-infrared region is absorbed by hemoglobin in the blood flowing through the blood vessels 202 of the biological part 200. The light-emitting unit 66 emits near-infrared light L2 when irradiated with light L1. The light-receiving unit 76 receives light (reflected light) of the light L1 reflected by the biological part 200 and the needle body 32 and the near-infrared light L2 emitted by the light-emitting unit 66, and creates a received-light image 82. The received-light image 82 created by the light-receiving unit 76 is displayed on the image display unit 78.

[0038] 5, the received light image 82 displays the skin 204, blood vessels 202, needle body 32, and light-emitting portion 66. Specifically, in the received light image 82, the skin 204 and light-emitting portion 66 are displayed brighter than the needle body 32.

[0039] 6, when the catheter assembly 12 is pushed forward, the blade surface 40 of the needle body 32 is inserted into the blood vessel 202 and the light emitting unit 66 is positioned within the blood vessel 202. Then, the light L1 is absorbed by the hemoglobin in the blood flowing within the blood vessel 202, and is no longer irradiated onto the light emitting unit 66.

[0040] 7 , the appearance of the light-emitting portion 66 changes in the received-light image 82 (the light-emitting portion 66 becomes darker). In other words, the brightness of the light-emitting portion 66 becomes substantially the same as the brightness of the blood vessel 202. Therefore, the user can immediately tell from the received-light image 82 that the blade surface 40 has entered the blood vessel 202. In other words, the user can know from the received-light image 82 that the entire blade surface 40 has been inserted into the blood vessel 202.

[0041] When the blade surface 40 is inserted into the blood vessel 202, blood in the blood vessel 202 is guided from the distal end opening 42 of the needle body 32 through the lumen 36 into the chamber 60. This allows the user to reconfirm, by flashback, that the blade surface 40 has been inserted into the blood vessel 202.

[0042] 8 , the user moves the wire operating unit 22 in the distal direction relative to the needle hub 34, causing the guide wire 20 to protrude from the distal opening 42 of the needle body 32. Then, the user inserts the catheter shaft 24 into the blood vessel 202 while aligning it with the guide wire 20. This leaves the catheter shaft 24 indwelling in the blood vessel 202. Next, an infusion is administered into the blood vessel 202 via the catheter member 16.

[0043] This embodiment has the following advantages.

[0044] According to the present invention, in the initial state of the catheter assembly 12, when the blade surface 40 is viewed from a direction perpendicular to the axis of the needle body 32, the light-emitting element 66 is positioned so as to overlap the distal opening 42. In this case, near-infrared light L2 emitted by the light-emitting element 66 is guided to the outside of the needle body 32 via the distal opening 42 and can be visualized by a received-light image 82 created based on the near-infrared light L2. Furthermore, the near-infrared light L2 is absorbed by hemoglobin in the blood flowing through the blood vessel 202. Therefore, the appearance of the light-emitting element 66 in the received-light image 82 changes before and after the blade surface 40 enters the blood vessel 202. This allows the user to immediately know that the blade surface 40 has entered the blood vessel 202.

[0045] The needle member 18 has a needle hub 34 provided at the proximal end of the needle body 32. The needle hub 34 includes a movement restricting portion 54 that restricts movement of the guide wire 20 in the proximal direction relative to the needle body 32 in the initial state of the catheter assembly 12.

[0046] With this configuration, in the initial state of the catheter assembly 12, the distal end of the light emitting section 66 can be prevented from being displaced in the proximal direction from the proximal end of the distal end opening 42.

[0047] The distal opening 42 includes an opening center 44 located at the center in the axial direction of the needle body 32. In the initial state of the catheter assembly 12, the light emitting section 66 is located further proximally than the opening center 44.

[0048] With this configuration, it is possible to accurately determine whether the entire blade surface 40 has been inserted into the blood vessel 202.

[0049] The distal opening 42 includes an open proximal end portion 46 located at the proximal end portion in the axial direction of the needle body 32. In the initial state of the catheter assembly 12, the light emitting unit 66 is located so as to overlap with the open proximal end portion 46 in a plan view.

[0050] With this configuration, it is possible to know with greater accuracy whether the entire blade surface 40 has been inserted into the blood vessel 202 .

[0051] The light emitting portion 66 includes a fluorescent material that emits near-infrared light L2 when irradiated with light L1.

[0052] With this configuration, the configuration of the light emitting section 66 can be simplified.

[0053] The vascular puncture system 10 includes a catheter assembly 12, an irradiation unit 74, a light receiving unit 76, and an image display unit 78. The irradiation unit 74 irradiates light L1 in the near-infrared region onto the tip of the catheter assembly 12 that has been inserted into a living body site 200. The light receiving unit 76 receives light reflected from the catheter assembly 12, part of the light L1, and near-infrared light L2 emitted by the light emitting unit 66, to create a received-light image 82. The image display unit 78 displays the received-light image 82.

[0054] With this configuration, the vein puncture procedure can be performed efficiently while viewing the received light image 82.

[0055] (Modification) Next, a catheter assembly 12a according to a modification will be described. In this modification, the same components as those in the catheter assembly 12 described above will be assigned the same reference numerals, and detailed description thereof will be omitted.

[0056] 9, the catheter assembly 12a includes a catheter member 16, a needle member 18a, a guidewire 20, and a wire operating section 22a. The needle member 18a has a needle body 32 and a needle hub 34a. The needle hub 34a includes a needle fixing section 50, a cylindrical section 52, a wire introduction section 90, and a movement restricting section 54a.

[0057] The cylindrical portion 52 does not have the port portion 56 described above. The lumen 58 of the cylindrical portion 52 is a flashback chamber 60 through which blood flows backward when the blade surface 40 of the needle body 32 enters the blood vessel 202. A filter portion 91 is provided at the base end of the cylindrical portion 52. The filter portion 91 has the same configuration as the filter portion 64 described above.

[0058] The wire introduction portion 90 includes a connecting portion 92 and a support portion 94. The connecting portion 92 is provided on the tubular portion 52. The connecting portion 92 has an inner cavity 96 that communicates with the inner cavity 58 of the tubular portion 52. The connecting portion 92 is provided with a slit valve 98 through which the guide wire 20 is inserted.

[0059] The slit valve 98 prevents blood that has flowed back into the chamber 60 from leaking out from the lumen 96 of the wire introduction part 90. The support part 94 extends from the connecting part 92 in the proximal direction so as to be inclined radially outward. The movement restricting part 54a includes a restricting wall 100 provided at the extending end of the support part 94. The restricting wall 100 restricts movement of the wire operating part 22a in a direction away from the slit valve 98.

[0060] The wire manipulation unit 22a includes a base portion 102 and a handle portion 104. The base portion 102 is attached to the proximal end of the guide wire 20. In the initial state of the catheter assembly 12a, the base portion 102 is in contact with the restricting wall 100. The handle portion 104 protrudes from the base portion 102. The handle portion 104 has a size and shape that allows it to be easily held by a user with their fingers.

[0061] In the catheter assembly 12a according to this modification, the same configuration as the catheter assembly 12 described above provides the same effects. Furthermore, according to this modification, in the initial state of the catheter assembly 12a, the base portion 102 is in contact with the restricting wall 100, so the guidewire 20 does not retract relative to the needle member 18a. Therefore, in the initial state of the catheter assembly 12a, the distal end of the light-emitting unit 66 is prevented from shifting proximally from the proximal end of the distal opening 42. Furthermore, the user can protrude the guidewire 20 from the distal opening 42 of the needle body 32 by pinching the handle portion 104 and moving it toward the slit valve 98.

[0062] In the catheter assembly according to the present invention, the movement restricting portion may be configured to restrict movement of the guide wire in the proximal direction relative to the needle body by bringing the guide wire and the needle body into contact with each other in the initial state of the catheter assembly.

[0063] The present invention is not limited to the above-described embodiment, and various configurations can be adopted without departing from the gist of the present invention.

[0064] This embodiment discloses the following.

[0065] The above embodiment discloses a catheter assembly (12, 12a) comprising a catheter member (16) having a hollow catheter shaft (24), a needle member (18, 18a) having a hollow needle body (32) inserted into the lumen (28) of the catheter shaft, and a guide wire (20) inserted into the lumen (36) of the needle body, wherein a blade surface (40) at the tip of the needle body is formed with a tip opening (42) that communicates with the lumen of the needle body, and the tip of the guide wire is provided with a light-emitting unit (66) that emits near-infrared light (L2), and the light-emitting unit is positioned so as to overlap the tip opening in an initial state in a plan view of the blade surface seen from a direction perpendicular to the axis of the needle body.

[0066] In the above-mentioned catheter assembly, the needle member has a needle hub (34, 34a) provided at the base end of the needle body, and the catheter assembly may also be provided with a movement control portion (54, 54a) that controls the movement of the guide wire toward the base end relative to the needle body in the initial state.

[0067] In the above catheter assembly, the tip opening may include an opening center (44) located at the center of the needle body in the axial direction, and the light-emitting unit may be located in the base end direction relative to the opening center in the initial state.

[0068] In the above catheter assembly, the tip opening may include an opening base end (46) located at the base end in the axial direction of the needle body, and the light-emitting unit may be positioned so as to overlap the opening base end in the planar view in the initial state.

[0069] In the catheter assembly, the light emitting section may include a fluorescent material that emits the near-infrared light when irradiated with light.

[0070] The above embodiment discloses a vascular puncture system (10) comprising the above-mentioned catheter assembly, an irradiation unit (74) that irradiates light (L1) in the near-infrared region onto the tip of the catheter assembly that has been inserted into a biological site (200), a light receiving unit (76) that receives, of the light, reflected light that is reflected by the biological site and the catheter assembly and the near-infrared light emitted by the light emitting unit, and creates a received-light image (82), and an image display unit (78) that displays the received-light image.

[0071] DESCRIPTION OF SYMBOLS 10... Blood vessel puncture system 12, 12a... Catheter assembly 16... Catheter member 18, 18a... Needle member 20... Guide wire 24... Catheter shaft 32... Needle body 34, 34a... Needle hub 40... Blade surface 42... Distal opening 44... Opening center portion 46... Opening base end portion 54, 54a... Movement restriction portion 66... ​​Light emitting portion 74... Irradiation portion 76... Light receiving portion 78... Image display portion 82... Received light image 200... Biological site

Claims

1. A catheter assembly comprising: a catheter member having a hollow catheter shaft; a needle member having a hollow needle body inserted into an inner cavity of the catheter shaft; and a guide wire inserted into an inner cavity of the needle body, the needle body having a blade surface at a tip end thereof having a tip opening communicating with the inner cavity of the needle body, A light emitting portion that emits near-infrared light is provided at the tip of the guide wire, A catheter assembly, wherein in an initial state, the light-emitting portion is positioned so as to overlap the tip opening when viewed in a plan view of the blade surface from a direction perpendicular to the axis of the needle body.

2. 2. The catheter assembly of claim 1, The needle member has a needle hub provided at a base end of the needle body, The catheter assembly includes a movement restricting portion that restricts movement of the guide wire in a proximal direction relative to the needle body in the initial state.

3. 2. The catheter assembly of claim 1, The tip opening includes an opening center located at the center in the axial direction of the needle body, A catheter assembly, wherein the light emitting portion is located in the proximal direction relative to the center of the opening in the initial state.

4. 4. The catheter assembly according to claim 3, the distal end opening includes an open base end portion located at a base end portion of the needle body in the axial direction, A catheter assembly, wherein in the initial state, the light-emitting section is positioned so as to overlap with the open base end section in the planar view.

5. 2. The catheter assembly of claim 1, The catheter assembly, wherein the light-emitting portion includes a fluorescent material that emits the near-infrared light when irradiated with light.

6. A catheter assembly according to any one of claims 1 to 5, an irradiation unit that irradiates a tip portion of the catheter assembly inserted into a living body part with light in a near infrared region; a light receiving unit that receives light reflected by the living body part and the catheter assembly and the near-infrared light emitted by the light emitting unit to create a received light image; and an image display unit that displays the received light image.