WO2022168529A1 - アダプタ - Google Patents
アダプタ Download PDFInfo
- Publication number
- WO2022168529A1 WO2022168529A1 PCT/JP2022/000408 JP2022000408W WO2022168529A1 WO 2022168529 A1 WO2022168529 A1 WO 2022168529A1 JP 2022000408 W JP2022000408 W JP 2022000408W WO 2022168529 A1 WO2022168529 A1 WO 2022168529A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light
- tube
- guide member
- adapter
- light guide
- Prior art date
Links
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Images
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Definitions
- the present invention relates to an adapter for connecting a connector provided at the proximal end of a light guide tube to a light source device.
- a tube inserted through the mouth or nose (referred to as an oral tube or a nasal tube) is used to supply liquid nutrients from the outside to a patient who has difficulty chewing or swallowing.
- Tube feeding is performed in which nutrients are sent directly into the stomach through a tube. Prior to delivering nutrients, it is necessary to ensure that the tip of the tube is positioned within the stomach.
- Patent Document 1 describes a method for confirming the position of the tip of the tube by inserting a tube with an optical fiber inserted in advance into the patient and observing the light emitted from the tip of the optical fiber from outside the body. This method requires that the optical fiber be withdrawn from the tube after the tube has been inserted into the patient and prior to delivering nutrients through the tube into the stomach. Once the optical fiber has been withdrawn, reinserting the optical fiber into the tube can cause an accident in which the optical fiber penetrates the tube during the insertion process and damages the gastrointestinal wall. Therefore, the method of Patent Document 1 has the problem that it can be used only when the tube is first inserted into the patient, and cannot be used for periodically confirming the position of the tip of the tube thereafter. there is
- the tube itself as a light guide path without using optical fibers.
- Light is incident on the proximal face of the tube and emitted from the distal end of the tube. According to this method, the position of the tip of the tube can be confirmed by emitting light from the tip of the tube not only when the tube is first inserted into the patient, but also whenever necessary thereafter.
- the connector may be cross-infected via the light source device.
- the possibility becomes even higher.
- connection the connector to the light source device by interposing some member between the connector and the light source device so that the connector does not come into direct contact with the light source device. In this case, it should be ensured that the member does not reduce the light incident on the tube.
- a first object of the present invention is to emit light from the tip of a light-guiding tube without causing cross-infection.
- a second object of the present invention is to efficiently allow the light from the light source device to enter the light guide tube.
- the adapter of the present invention is for connecting a connector provided at the proximal end of a flexible hollow light-guiding tube to a light source device.
- the connector includes a hollow cylindrical cylindrical member and a hollow cylindrical base pipe arranged coaxially with the cylindrical member.
- the light-guiding tube extends from the base tube toward the side opposite to the cylindrical member.
- the adapter includes a first connecting portion that can be connected to and separated from the light source device, a second connecting portion that can be connected to and separated from the connector, and a light emitted from the light source device. a light guide member leading to the proximal end face of the optical tube.
- the connector is connected to the light source device via the adapter. Therefore, the tip of the light-conducting tube can be illuminated without cross-contamination of the connector.
- the adapter includes a light guide member that guides light emitted from the light source device to the base end surface of the light guide tube. Therefore, the light from the light source device can be efficiently made incident on the light guide tube.
- FIG. 1 shows a schematic configuration of a system for detecting the tip position of a tube using an adapter according to Embodiment 1 of the present invention.
- 2A is a perspective view showing an adapter and a connector provided on a tube according to Embodiment 1 of the present invention
- FIG. 2B is a cross-sectional view showing the adapter and the connector provided on the tube according to the first embodiment of the present invention
- FIG. 3 is a cross-sectional view showing a state in which the connector is connected to the light source device via the adapter according to the first embodiment of the present invention
- FIG. FIG. 4A is a perspective view showing an adapter and a connector provided on a tube according to a second embodiment of the present invention.
- FIG. 4B is a cross-sectional view showing the adapter and the connector provided on the tube according to the second embodiment of the present invention
- FIG. 5 is a cross-sectional view showing a state in which the connector is connected to the light source device via the adapter according to the second embodiment of the invention.
- 6A is a perspective view showing an adapter and a connector provided on a tube according to a third embodiment of the present invention
- FIG. 6B is a cross-sectional view showing an adapter and a connector provided on a tube according to Embodiment 3 of the present invention
- FIG. FIG. 7 is a cross-sectional view showing a state in which a connector is connected to a light source device via an adapter according to a third embodiment of the present invention
- FIG. 8 is a cross-sectional view showing a state in which a connector is connected to a light source device via an adapter according to Embodiment 4 of the present invention.
- 9A is a perspective view showing an adapter and a connector provided on a tube according to a fifth embodiment of the present invention
- FIG. 9B is a cross-sectional view showing an adapter and a connector provided on a tube according to Embodiment 5 of the present invention.
- FIG. 9C is a cross-sectional view showing an adapter and a connector provided on a tube according to Embodiment 5 of the present invention.
- FIG. FIG. 10 is a cross-sectional view showing a state in which the connector is connected to the light source device via the adapter according to the fifth embodiment of the invention.
- the light guide member may include a light incident end face into which light from the light source device is incident.
- a convex curved surface may be provided on the light incident end surface.
- the light guide member may have an annular light emitting end surface that emits light toward the base end surface of the light guiding tube. According to this aspect, the light emitted from the light guide member can be efficiently incident on the base end surface of the tube. This is advantageous for improving the brightness of the tip of the tube.
- the light guide member may have a light emitting end surface that emits light toward the base end surface of the light guiding tube.
- the light emitting end face may have a lens function for condensing light onto the base end face of the light guiding tube.
- the light emitted from the light guide member can be efficiently incident on the base end surface of the tube. This is advantageous for improving the brightness of the tip of the tube.
- the light guide member includes a light incident end face into which light from the light source device is incident, and a light exit end face from which light is emitted toward the base end face of the light guiding tube.
- the light incident end face may have a larger area than the light emitting end face.
- the light guide member includes a light incident end face into which light from the light source device is incident, and a light exit end face from which light is emitted toward the base end face of the light guiding tube.
- An outer diameter of the light guide member may be constant between the light incident end surface and the light emitting end surface. According to this aspect, the shape of the light guide member is simplified. This is advantageous for cost reduction of the adapter.
- the light guide member when the second connecting portion is connected to the connector, the light guide member may face the cylindrical member in the axial direction. According to this aspect, the configuration of the adapter can be simplified.
- the light guide member may be inserted into the cylindrical member when the second connecting portion is connected to the connector. According to this aspect, even if the proximal end surface of the light-guiding tube is receded from the distal end of the cylindrical member, light can be incident on the proximal end surface of the tube. Therefore, regardless of the inner diameter of the tube, the diameter of the opening at the tip of the tubular member can be made the same as that of the existing connector. It is possible to apply the adapter of the present invention to connectors having compatibility with existing connectors.
- the adapter of one aspect of the present invention may further include a lens for condensing the light emitted from the light source device onto the light incident end surface of the light guide member.
- the light from the light source device can be efficiently incident on the base end surface of the tube. This is advantageous for improving the brightness of the tip of the tube.
- the side surface of the light guide member may protrude in the axial direction from the tip surface of the first connecting portion.
- the protruding side surface of the light guide member can be used to align the light guide member with the light source device. This is advantageous for improving the brightness of the tip of the tube.
- the adapter of one aspect of the present invention may further include an engagement structure that engages with the light source device when the first connecting portion is connected to the light source device. According to this aspect, it is possible to prevent the adapter from falling off from the light source device. Further, the adapter can be positioned and held at a predetermined position in the axial direction of the light source device.
- the adapter of one aspect of the present invention may further include an intermediate portion between the first connection portion and the second connection portion. Such an aspect is advantageous in reducing the possibility of contamination of the first connection and the second connection by a user's finger.
- the intermediate portion may be provided with a gripping surface. According to this aspect, the user can stably grip the adapter on the grip surface, and can easily apply an axial force and/or a rotational force around the axis to the adapter.
- the intermediate portion may be provided with a raised surface protruding radially outward.
- the raised surface functions as a "gripping position regulating structure" that axially regulates the position at which the user's fingers grip the intermediate portion.
- the raised surface facilitates applying axial force to the adapter. Also, the raised surface reduces the possibility of contamination of the first connection and the second connection by a user's finger.
- the second connecting portion may have a fitting structure that fits into the connector.
- the connector can be coaxially and firmly connected to the second connecting portion.
- the mating structure may be, for example, a male taper surface or a female taper surface that may form a taper fit.
- the connector may further include an outer cylinder surrounding the tubular member, and a female thread provided on an inner peripheral surface of the outer cylinder facing the tubular member. According to this aspect, it becomes possible to apply the adapter of the present invention to a male connector provided at the proximal end of a nasal tube used for nasal tube feeding.
- the "axis" of a member means the central axis of the member.
- An “axis” passes through the center of a circle contained in the member and/or coincides with the central axis of a cylinder or cone (taper) contained in the member. Axes are self-explanatory to those of ordinary skill in the art, and are omitted from the figures shown below for clarity of illustration.
- a direction along a straight line perpendicular to the axis is called a “radial direction”. In the radial direction, the side closer to the axis is called the “inner” side, and the side farther from the axis is called the “outer” side.
- the direction of rotation around the axis is called the "circumferential direction”.
- a connector 50 is provided at the proximal end of a nasal tube (hereinafter simply referred to as “tube”) 60 .
- the tube 60 is inserted through the nasal cavity of the patient 90 and the tip 65 of the tube 60 reaches the stomach 91 .
- the tube 60 has flexibility that allows it to be freely curved and deformed.
- the tube 60 is a hollow cylinder with a continuous flow path 69 (see FIG. 2B described later) formed along its entire length.
- liquid nutrients are administered to the patient's stomach 91 through connector 50 and tube 60 .
- the connector 50 can be repeatedly connected to and disconnected from the light source device 70 via the adapter 1 according to the first embodiment of the invention.
- the connector 50 When the connector 50 is connected to the light source device 70 via the adapter 1, light from a light source 78 (see FIG. 3 described later) built in the light source device 70 passes through the adapter 1, the connector 50 and the tube 60 in order. It exits from the tip 65 of the tube 60 . Light from the tip 65 penetrates the body of the patient 90 and illuminates the body surface. The operator can confirm the position of the distal end 65 of the tube 60 from the light emitting position on the body surface of the patient 90 .
- FIG. 2A is a perspective view showing the adapter 1 and the connector 50 provided on the tube 60.
- FIG. 2B is a cross-sectional view of FIG. 2A along a plane containing the axis (not shown) of adapter 1 and connector 50.
- the adapter 1 has a first connection part 10 that can be connected to and separated from the light source device 70 (see FIG. 1) at one end, and a second connection that can be connected to and separated from the connector 50 at the other end.
- a unit 20 is provided.
- the first connection portion 10 and the second connection portion 20 are arranged coaxially.
- the first connection portion 10 includes a hollow cylindrical first connection tube 11 .
- the outer peripheral surface of the first connecting tube 11 is a cylindrical surface having a constant outer diameter in the axial direction.
- the outer peripheral surface of the first connection tube 11 is not limited to this. It can be a face.
- the second connection portion 20 includes a hollow cylindrical second connection tube 21 .
- a female taper surface 23 is provided on the inner peripheral surface of the second connection tube 21 so that the inner diameter increases toward the tip (the end opposite to the first connection portion 10).
- a light guide member 30 is housed inside the first connection tube 11 .
- the light guide member 30 includes a light incident end surface 31 and a light emitting end surface 32 facing opposite to each other in the axial direction, and a side surface 33 connecting the light incident end surface 31 and the light emitting end surface 32 .
- the light guide member 30 has a substantially truncated cone shape with a larger diameter on the light incident end surface 31 side.
- the light guide member 30 is fitted into the first connection tube 11 with the side surface 33 that is a conical surface or a tapered surface in close contact with the inner peripheral surface of the first connection tube 11 with substantially no gap.
- the light incident end face 31 faces the tip side of the first connection portion 10 (the side opposite to the second connection portion 20), and is a convex curved surface in the first embodiment.
- the light emitting end face 32 faces the inner cavity of the second connecting tube 21 and is a groove continuous annularly around the axis of the adapter 1 in the first embodiment. More specifically, as shown in FIG. 2B, the cross-sectional shape of the light emitting end face 32 along the plane containing the axis of the adapter 1 includes two substantially circular arcs symmetrical with respect to the axis.
- the light emitting end surface 32 is an annular concave curved surface formed by a trajectory obtained when these two substantially circular arcs are rotated around the axis.
- the adapter 1 is composed of two parts, a light guide member 30 and a portion other than the light guide member 30 (adapter main body 101).
- the adapter main body 101 is made of a material having mechanical strength (rigidity) to the extent that it is not substantially deformed by an external force. Examples of such materials include resin materials such as polypropylene, acrylonitrile-butadiene-styrene copolymer, polycarbonate, polyacetal, polystyrene, polyamide, polyethylene, and rigid polyvinyl chloride.
- the adapter main body 101 can be integrally formed as a single part using the above resin material.
- the light guide member 30 is made of a light-guiding material (light-guiding material) so that light can enter from the light-incident end surface 31 , pass through the light-guiding member 30 , and exit from the light-emitting end surface 32 .
- light-guiding materials include resin materials such as polypropylene, acrylonitrile-butadiene-styrene copolymer, rigid polyvinyl chloride, polyurethane, silicone, polyethylene, styrene elastomer, polybutadiene, polyolefin, acrylic resin (such as PMMA), and polycarbonate.
- a transparent material such as quartz glass or the like can be used.
- resin materials are preferred from the viewpoint of moldability and handling properties, and acrylic resins (for example, PMMA) and polycarbonate are more preferred.
- acrylic resins for example, PMMA
- polycarbonate are more preferred.
- FIG. For this purpose, it is effective to reduce the light emitted from the side surface 33 (leakage light).
- Means for reducing leaked light include, but are not limited to, (1) light guide member 30 having a multilayer structure including at least an inner layer with a high refractive index and an outer layer with a low refractive index; A reflective layer (for example, a vapor-deposited layer of a metal such as silver or aluminum) may be provided on the substrate.
- the method of integrating the light guide member 30 with the adapter main body 101 is not limited. 11, or a method of manufacturing one of the light guide member 30 and the adapter main body 101 and then integrating the other with said one by two-color molding.
- the connector 50 has a connector portion 51 on its distal end side (adapter 1 side) and a base tube 58 on its proximal end side.
- the connector portion 51 includes a cylindrical member (male member) 52 having a hollow cylindrical shape and an outer cylinder 56 surrounding the cylindrical member 52 .
- the connector portion 51 (or the cylindrical member 52) and the base tube 58 are arranged coaxially.
- a through hole 59 extends through the connector 50 from the tubular member 52 to the base tube 58 along the axis of the connector 50 .
- the inner peripheral surface of the through hole 59 is a cylindrical surface coaxial with the axis of the connector 50 .
- a male tapered surface 53 is provided on the outer peripheral surface of the cylindrical member 52, the outer diameter of which decreases as the tip of the cylindrical member 52 is approached.
- the outer peripheral surface of the cylindrical member 52 further has a distal end tapered surface 54 having a larger taper angle than the male tapered surface 53 on the distal end side of the male tapered surface 53 .
- the tip of the cylindrical member 52 (a part or the whole of the tip tapered surface 54 ) protrudes from the tip of the outer cylinder 56 in the axial direction of the connector 50 . Projecting the tubular member 52 more than the outer tube 56 is advantageous in facilitating connection of the connector 50 (or the tubular member 52 ) to the adapter 1 .
- a flange 55 protrudes radially outward from the proximal end of the tubular member 52 .
- An outer cylinder 56 extends from the circular outer edge of the flange 55 toward the same side as the cylinder member 52 (toward the tip end of the connector 50).
- the outer cylinder 56 has a substantially cylindrical shape and is arranged coaxially with the cylinder member 52 .
- the outer cylinder 56 is radially spaced apart from the cylinder member 52 .
- a female screw 57 is provided on the inner peripheral surface of the outer cylinder 56 facing the cylinder member 52 .
- the connector part 51 is configured to be compatible with a male connector used in tube feeding (for example, see FIGS. 4A and 4B of Patent Document 2).
- a flexible hollow tube 60 is inserted into the through hole 59 of the connector 50.
- the outer diameter of the tube 60 is substantially the same as the inner diameter of the through hole 59 .
- the tube 60 has a proximal end surface 61 that is a terminal surface on the proximal side thereof.
- the base end surface 61 is a flat surface perpendicular to the longitudinal direction of the tube 60 .
- the base end surface 61 forms the same plane as the tip of the tubular member 52 and is exposed to the outside.
- the tube 60 is fixed to the connector 50 (particularly the base tube 58) with an adhesive or the like so as not to separate from the connector 50. As shown in FIG.
- the tube 60 is led out from the base tube 58 toward the side opposite to the cylindrical member 52 .
- the connector 50 is made of a material having enough mechanical strength (rigidity) that it is not substantially deformed by an external force.
- the resin material described above as the material of the adapter main body 101 of the adapter 1 can be used.
- the connector 50 can be integrally formed as a single part using the above resin material.
- the material of the tube 60 is not limited, but preferably has flexibility and light guiding properties.
- resins such as polyurethane, acrylic, silicone, polyethylene, styrene elastomer, polybutadiene, and polyolefin can be used.
- light incident from the base end surface 61 of the tube 60 passes through the tube 60 (the portion between the inner peripheral surface and the outer peripheral surface of the tube 60 that constitutes the thickness of the tube 60) and passes through the tip 65. (see FIG. 1) and the tip 65 emits light.
- Means for reducing leakage light include, but are not limited to, (1) smoothing the outer peripheral surface of the tube 60, (2) covering the outer peripheral surface of the tube 60 with a coating material having a lower refractive index than the tube 60. (3) A reflective layer (e.g., metal deposition layer of silver, aluminum, etc.) is provided on the outer peripheral surface of the tube 60.
- the tube 60 has a multilayer structure comprising at least an inner layer with a high refractive index and an outer layer with a low refractive index. and the like, or a combination of two or more.
- the light In order for the light from the tip 65 to illuminate the body surface of the patient 90 regardless of the orientation of the tip 65 within the stomach 91 (see FIG. 1), the light must travel from the tip 65 of the tube 60 along the length of the tube 60. It is preferable to radiate in a direction perpendicular or oblique to the direction.
- the distal end 65 of the tube 60 may be provided with an inclined light exit surface, and/or a reflective or refractive member may be provided opposite the light exit surface of the distal end 65 of the tube 60, or the like. preferable.
- the adapter 1 is used to connect the connector 50 to the light source device 70, as shown in FIG.
- the light source device 70 includes a holding portion 71 that accommodates and holds the first connection portion 10 (first connection tube 11 ), and a light source 78 that is located deeper than the holding portion 71 .
- the holding portion 71 includes a holding tube 72 and a stepped surface 73 .
- the inner peripheral surface of the holding tube 72 is a cylindrical surface having approximately the same diameter as the first connecting tube 11 .
- the step surface 73 is provided at a position a predetermined distance from the open end of the holding cylinder 72 so as to protrude radially inward from the inner peripheral surface of the holding cylinder 72 .
- the light source 78 is arranged coaxially with the holding portion 71 (or the holding tube 72).
- the first connection portion 10 of the adapter 1 is inserted into the holding portion 71 until the tip of the first connection tube 11 contacts the step surface 73 .
- the holding cylinder 72 positions the first connecting portion 10 (or the light guide member 30) coaxially with the light source 78. As shown in FIG.
- the stepped surface 73 positions the first connecting portion 10 (or the light guide member 30 ) at a predetermined distance from the light source 78 in the axial direction.
- a light incident end surface 31 of the light guide member 30 faces the light source 78 .
- the second connection portion 20 (or the second connection tube 21) of the adapter 1 is inserted into the gap between the outer tube 56 of the connector 50 and the tube member 52.
- the tubular member 52 of the connector 50 is inserted into the second connection portion 20 (or the second connection tube 21).
- the female taper surface 23 of the second connection tube 21 has the same outer diameter and taper angle as the male taper surface 53 of the tube member 52 . Therefore, the male tapered surface 53 is taper-fitted to the female tapered surface 23 .
- the tubular member 52 (or the base end surface 61 of the tube 60 ) is positioned coaxially with the light guide member 30 and at a predetermined distance from the light guide member 30 in the axial direction. A base end surface 61 of the tube 60 faces the light emitting end surface 32 of the light guide member 30 .
- the light source 78 is made to emit light.
- the light source 78 emits light toward the light incident end surface 31 of the light guide member 30 .
- Light emitted from the light source 78 enters the light incident end surface 31 , passes through the light guide member 30 , exits from the light emitting end surface 32 , and enters the base end surface 61 of the tube 60 .
- a light emitting diode can be used as the light source 78, although not limited thereto.
- the light emitted by the light source 78 is preferably visible light or near-infrared light, and the wavelength of the light is not limited, but is preferably 360 nm or more, further 630 nm or more, and 3000 nm or less, further 780 nm. The following are preferable.
- Light with a wavelength in this range has a high transmittance to the human body, is less invasive to the human body, and is highly safe. Since visible light can be observed with the naked eye, the position of the tip 65 of the tube 60 can be easily confirmed.
- Near-infrared light is more transparent than visible light, and can be observed through a dedicated camera such as an infrared camera.
- light with a wavelength of 630 nm can be used as visible light, or light with a wavelength of 780 nm can be used as near-infrared light.
- the light source 78 may be provided with a lens and/or a lens may be provided between the light source 78 and the light guide member 30 so that the light emitted from the light source 78 is efficiently incident on the light incident end surface 31 of the light guide member 30 .
- a lens may be provided.
- a nasal tube having a connector 50 provided at the proximal end of the tube 60 is prepared.
- the tube 60 is inserted into the patient's 90 nasal cavity in the same manner as a common nasal tube (see FIG. 1).
- the adapter 1 is connected to the connector 50 and the adapter 1 is connected to the light source device 70 .
- the light source 78 (see FIG. 3) is caused to emit light.
- Light emitted from the light source 78 passes through the light guide member 30 and the tube 60 in order and is emitted from the tip 65 of the tube 60 .
- Light from tip 65 is transmitted through patient 90 .
- the operator can confirm the position of the distal end 65 from the position of light emission on the body surface of the patient 90 . Depending on its wavelength, the light can be seen with the naked eye or via an infrared camera.
- the tube 60 with a stylet (sometimes called a guide wire) inserted into the flow channel 69 in advance may be inserted into the patient 90 in the same manner as inserting a general nasal tube.
- the proximal end of the stylet can lead out of connector 50 .
- the connector 50 is connected to the adapter 1 after the stylet is pulled out from the tube 60 .
- the tube 60 in which the optical fiber is inserted into the channel 69 so that the tip reaches the tip 65 of the tube 60 may be inserted into the patient 90 .
- Light source device 70 is used to illuminate the tip of the optical fiber in addition to tip 65 . Since the luminous flux from the tip 65 increases, the position of the tip 65 can be confirmed more accurately. After confirming that the tip of the tube 60 has reached the stomach, the optical fiber is pulled out from the tube 60. - ⁇
- the connector 50 After confirming that the tip 65 of the tube 60 has reached the stomach, separate the adapter 1 from the connector 50 . Then, the connector 50 is connected to a connector (female connector; see, for example, FIGS. 5A and 5B of Patent Document 2) provided at the downstream end of a tube (generally called a tube feeding set) that conveys nutrients. . Nutrients pass through channel 69 of tube 60 and exit tip 65 for administration to the patient.
- the connector 50 is left in the patient 90 for several days together with the tube 60. During this time, the tube 60 may curl up and the tip 65 may move. Therefore, the connector 50 is connected to the light source device 70 via the adapter 1 every predetermined time (for example, immediately before administering the nutrient to the patient 90), and the tip 65 is illuminated to confirm its position.
- the adapter 1 of Embodiment 1 includes the first connection portion 10 that can be connected to and separated from the light source device 70 and the second connection portion 20 that can be connected to and separated from the connector 50. Prepare. Therefore, the connector 50 can be connected to the light source device 70 via the adapter 1 .
- the adapter 1 further includes a light guide member 30 that guides light emitted from the light source device 70 to the base end surface 61 of the tube 60 . Therefore, when the light from the light source 78 is incident on the light incident end surface 31 of the light guide member 30, the light passes through the light guide member 30, is emitted from the light emitting end surface 32, and is incident on the base end surface 61 of the tube 60. be able to.
- the light also passes through tube 60 and exits from tip 65 of tube 60 .
- the tip 65 of the tube 60 can be made to emit light using the tube 60 itself as a light guide path. Light from tip 65 is observable through the body of patient 90 . Therefore, the position of the tip 65 of the tube 60 can be easily and accurately detected.
- Patent Document 1 it is necessary to insert an optical fiber into the tube in order to confirm the tip position of the tube. If the optical fiber is withdrawn from the tube and then reinserted into the tube, the optical fiber can pierce the tube and damage the gastrointestinal wall. On the other hand, in the present embodiment 1, the essential optical fiber in Patent Document 1 is not required. The position of tip 65 of tube 60 can be confirmed without reinserting the optical fiber into tube 60 . For this reason, in the first embodiment, the above accident that can occur in Patent Document 1 cannot occur. At any time after the tube 60 is inserted into the patient 90, the tip 65 of the tube 60 can be illuminated to safely locate the tip 65, if desired.
- the connector 50 is connected to the light source device 70 via the adapter 1.
- the connector 50 is connected to the light source device 70 via the adapter 1, not only when the tube 60 is first inserted into the patient 90, but also when it is necessary to check the position of the tip 65 after the tube 60 is inserted into the patient. can be connected. It is not necessary to directly connect the connector 50 to the light source device 70 to confirm the position of the tip 65 . Even if the light source device 70 (especially the holding portion 71) is contaminated, the possibility of the connector 50 being contaminated is low if a clean adapter 1 is used. For example, even when a common light source device 70 is used for a plurality of patients, cross-infection can be prevented by using separate and clean adapters 1 for each patient.
- the tip 65 of the tube 60 can be illuminated without causing cross-infection.
- adapter 1 is cleaned and sterilized after each use. More preferably, the adapter 1 is discarded after each use and a new one is always used.
- the adapter 1 includes a light guide member 30 that guides light emitted from the light source 78 to the base end surface 61 of the tube 60 . Therefore, the light from the light source 78 can be efficiently incident on the tube 60 . This is advantageous for improving the brightness (luminous flux) of tip 65 of tube 60 .
- the light guide member 30 has a light incident end surface 31 provided with a convex curved surface.
- the convex curved surface refracts the light from the light source 78 so as to converge on the axis of the light guide member 30 . This is advantageous for reducing light (leakage light) emitted from the side surface 33 of the light guide member 30 .
- the light incident end face 31 may not have a convex curved surface.
- the light incident end surface 31 may be a flat surface perpendicular to the axis of the adapter 1 or a concave curved surface.
- the light guide member 30 has an annular light emitting end face 32 axially facing the annular base end face 61 of the tube 60 .
- the annular light emitting end surface 32 is advantageous in allowing the light emitted from the light guide member 30 to enter the annular base end surface 61 of the tube 60 without waste.
- the annular concave curved surface provided on the light emitting end surface 32 has a lens function of refracting the light emitted from the light guide member 30 so as to converge on the annular base end surface 61 . This is more advantageous for efficiently causing the light emitted from the light guide member 30 to enter the base end surface 61 of the tube 60 .
- the shape of the light emitting end surface 32 is not limited to the above.
- the light exit end face 32 may be a non-annular concave surface or a flat surface perpendicular to the axis of the adapter 1 .
- the flat surface may be an annular flat surface such as a light emitting end surface 232 (see FIG. 4B) of Embodiment 2, which will be described later.
- the light exit end surface 32 may be a convex curved surface.
- the convex curved surface may be an annular convex curved surface.
- the cross-sectional shape of the annular convex curved surface along the plane containing the axis of the adapter 1 includes two approximate circular arcs symmetrical with respect to the axis, and the annular convex curved surface is formed when these two approximate circular arcs rotate around the axis. may be constructed by the trajectory obtained in
- the light guide member 30 When the connector 50 is connected to the second connecting portion 20, the light guide member 30 is not inserted into the tubular member 52 and faces the tip of the tubular member 52 in the axial direction. This is advantageous for simplifying the construction of the adapter 1. FIG. Therefore, it is possible to easily optically couple the light guide member 30 and the tube 60 using the simple and inexpensive adapter 1 .
- the light guide member 30 has a substantially truncated cone shape in which the light incident end surface 31 is larger in diameter than the light emitting end surface 32 . More light can enter the light guide member 30 through the large-area light incident end surface 31 . This is advantageous for improving the brightness (luminous flux) at the tip 65 of tube 60 .
- the present invention is not limited to this.
- the light guide member 30 may have a substantially cylindrical shape in which the side surface 33 is a cylindrical surface having a constant outer diameter in the axial direction.
- the outer peripheral surface of the second connection tube 21 may be provided with a male thread that engages with the female thread 57 of the connector 50 .
- the second connection part 20 may be configured such that the outer cylinder 56 of the connector 50 fits into the second connection cylinder 21 instead of the cylinder member 52 .
- the inner peripheral surface 23 of the second connecting tube 21 is configured to fit the outer peripheral surface of the outer tube 56 .
- the proximal end surface 61 of the tube 60 does not have to be at exactly the same position as the distal end of the tubular member 52 in the axial direction of the connector 50 .
- the proximal end surface 61 may be slightly recessed or projected from the distal end of the tubular member 52 . Even in this case, it is possible for the light emitted from the light emitting end surface 32 of the light guide member 30 to enter the base end surface 61 of the tube 60 .
- FIG. 4A is a perspective view showing the adapter 2 according to Embodiment 2 of the present invention and the connector 250 provided at the proximal end of the tube 60.
- FIG. 4B is a cross-sectional view of FIG. 4A along a plane containing the axis (not shown) of adapter 2 and connector 250.
- FIG. The adapter 2 of the second embodiment will be described, focusing on the differences from the first embodiment.
- the adapter 2 has a first connection portion 10 at one end and a second connection portion 20 at the other end.
- the first connection portion 10 and the second connection portion 20 are arranged coaxially.
- the first connection portion 10 includes a hollow cylindrical first connection tube 211 .
- the outer peripheral surface of the first connecting tube 211 is a cylindrical surface having a constant outer diameter in the axial direction, like the first connecting tube 11 of the first embodiment.
- the outer peripheral surface of the first connection tube 211 is not limited to this. It can be a face.
- a lens 237 is provided at or near the tip of the first connection tube 211 (the end opposite to the second connection portion 20) so as to block the opening of the first connection tube 211 and coaxially with the first connection tube 211. ing.
- the adapter 2 further comprises a partition wall 205 that separates the inner cavity of the first connecting tube 211 and the inner cavity of the second connecting tube 21 .
- the partition wall 205 may be a flat plate perpendicular to the axis of the adapter 2 .
- a hole 206 is provided in the center of the partition wall 205 so as to penetrate the partition wall 205 in the axial direction.
- a light guide member 230 is held by the partition wall 205 so as to block the hole 206 .
- the light guide member 230 has an elongated rod shape (substantially cylindrical shape) and extends coaxially with the adapter 2 .
- the light guide member 230 has a light incident end surface 231 and a light emitting end surface 232 facing opposite sides in the axial direction.
- the light incident end face 231 faces the tip side of the first connection portion 10 (the side opposite to the second connection portion 20), and is a convex curved surface in the second embodiment.
- the light emitting end surface 232 is a flat surface facing away from the first connecting portion 10 and perpendicular to the axis of the adapter 2 . More specifically, the light exit end face 232 is an annular flat face surrounding a conical recess 234 coaxial with the adapter 2 .
- a side surface (peripheral surface) 233 of the light guide member 230 is slightly enlarged in the vicinity of the light emitting end surface 232 .
- the light guide member 230 protrudes axially further than the second connection tube 21 of the second connection portion 20 .
- the second connection tube 21 is radially separated from the light guide member 230 and surrounds the light guide member 230 .
- the adapter 2 is composed of three parts: a light guide member 230, a lens 237, and a portion other than the light guide member 230 and the lens 237 (adapter main body 201).
- the adapter main body 201 is made of a material having mechanical strength (rigidity) to the extent that it is not substantially deformed by an external force.
- the material that can be used for the adapter body 201 of the first embodiment can be used as the material for the adapter body 201 of the second embodiment.
- the light guide member 230 is made of a light-guiding material (light-guiding material) so that light can enter from the light-incident end surface 231 , pass through the light-guiding member 230 , and exit from the light-emitting end surface 232 . ).
- the lens 237 is made of a light-guiding material (light-guiding material) so that the light emitted from the light source 78 (see FIG. 5 described later) can be condensed toward the light-incident end surface 231 of the light-guiding member 230 . material).
- the light guide material that can be used for the light guide member 30 of Embodiment 1 can be used as the light guide material for the light guide member 230 and the lens 237 .
- the means for reducing leakage light from the side surface 33 of the light guide member 30 described in the first embodiment can also be applied to the light guide member 230 in the same manner.
- the method of integrating the light guide member 230 and the lens 237 into the adapter main body 201 is not limited. 205 and inserting the lens 237 into the first connecting tube 211, and one of the light guide member 230 and the lens 237 and the adapter body 201 are integrally manufactured by two-color molding. After that, a method of fitting the other of the light guide member 230 and the lens 237 into the adapter main body 201 can be used.
- the connector 250 and tube 60 are roughly the same as the connector 50 and tube 60 of Embodiment 1 (see FIGS. 2A and 2B).
- the proximal end surface 61 of the tube 60 is located at a position retreated from the distal end of the tubular member 52 .
- the proximal end surface 61 faces the distal end side of the tubular member 52 .
- the tube 60 is not substantially inserted into the tubular member 52 .
- the present invention is not limited to this, and the tube 60 may extend into the cylindrical member 52 (that is, the base end surface 61 may be positioned within the cylindrical member 52).
- FIG. 5 is a cross-sectional view showing a state in which the connector 250 is connected to the light source device 70 via the adapter 2.
- FIG. The light source device 70 is the same as in the first embodiment.
- the first connection portion 10 of the adapter 2 is inserted into the holding portion 71 until the tip of the first connection tube 211 contacts the step surface 73 .
- the holding barrel 72 positions the first connecting portion 10 (or the lens 237 ) coaxially with the light source 78 .
- the stepped surface 73 positions the first connecting portion 10 (or the lens 237 ) at a predetermined axial distance from the light source 78 .
- a lens 237 faces the light source 78 .
- the second connection portion 20 (or the second connection tube 21) of the adapter 2 is connected to the connector 250 in the same manner as in the first embodiment.
- the male tapered surface 53 of the tubular member 52 is tapered and fitted to the female tapered surface 23 of the second connection tube 21 .
- the light guide member 230 is inserted into the through hole 59 of the tubular member 52 .
- Light guide member 230 is positioned coaxially with tube 60 .
- the light emitting end face 232 of the light guide member 230 axially faces the proximal end face 61 of the tube 60, is close to the proximal end face 61, and preferably abuts thereon.
- the light source 78 emits light toward the lens 237.
- the lens 237 collects the light emitted from the light source 78 toward the light incident end surface 231 of the light guide member 230 .
- the light incident on the light incident end surface 231 passes through the light guide member 230 , exits from the light emitting end surface 232 , and enters the base end surface 61 of the tube 60 .
- the method of using the adapter 2 of the second embodiment is the same as that of the first embodiment.
- the tip 65 (see FIG. 1) of the tube 60 can be illuminated using the tube 60 itself as a light guide path. Therefore, the position of the tip 65 of the tube 60 can be detected safely, easily and accurately. Since there is no need to directly connect the connector 250 to the light source device 70, cross infection can be prevented.
- the adapter 2 includes a lens 237 for condensing light emitted from the light source 78 onto the light incident end surface 231 of the light guide member 230 . Therefore, the light from the light source 78 can be efficiently incident on the tube 60 . This is advantageous for improving the brightness (luminous flux) of tip 65 of tube 60 .
- the diameter of the lens 237 is larger than the diameter of the light incident end surface 231 . More light can enter the light guide member 30 through the large-area lens 237 . This is advantageous for improving the brightness (luminous flux) at the tip 65 of tube 60 .
- the present invention is not limited to this, and the adapter 2 may not have the lens 237 .
- the light source 78 may include a lens and/or the light source device 70 may include the light source 78 and the light guide member so that the light from the light source 78 is efficiently incident on the light incident end surface 231 of the light guide member 230 .
- 230 may be provided with a lens.
- the adapter 2 includes a light guide member 230 that guides the light emitted from the light source 78 to the base end surface 61 of the tube 60 . Therefore, the light from the light source 78 can be efficiently incident on the tube 60 . This is advantageous for improving the brightness (luminous flux) of tip 65 of tube 60 .
- the light guide member 230 has a light incident end surface 231 provided with a convex curved surface.
- the convex curved surface refracts the light from the light source 78 so as to converge on the axis of the light guide member 230 . This is advantageous for reducing light (leakage light) emitted from the side surface 233 of the light guide member 230 .
- the light incident end face 231 may not have a convex curved surface.
- the light incident end surface 231 may be a flat surface perpendicular to the axis of the adapter 2 or a concave curved surface.
- the light guide member 230 has an annular light emitting end face 232 axially facing the annular base end face 61 of the tube 60 .
- the ring-shaped light emitting end face 232 is advantageous in allowing the light emitted from the light guide member 30 to enter the ring-shaped base end face 61 of the tube 60 without waste.
- the light emitting end surface 232 has an annular flat surface. This is more advantageous for causing the light emitted from the light guide member 230 to enter the tube 60 without waste.
- the shape of the light emitting end surface 232 is not limited to the above.
- the light exit end surface 232 may be a flat surface without the concave portion 234 .
- the light exit end face 232 may be a concave curved surface or a convex curved surface.
- the cross-sectional shape of the light emitting end face 232 along a plane including the axis of the adapter 2 may include two substantially circular arcs symmetrical with respect to the axis, and the light emitting end face 232 has the two substantially circular arcs as the axes. It may be an annular concave or convex surface formed by a trajectory obtained when rotated around.
- the light emitting end face 232 may have a lens function that refracts the light emitted from the light guide member 230 so as to converge on the annular base end face 61 .
- At least part of the light emitting end surface 232 of the light guide member 230 is preferably axially opposed to the base end surface 61 of the tube 60 .
- part of the light emitting end face 232 may protrude radially outward or inward from the base end face 61
- part of the base end face 61 may protrude from the light emitting end face 232 . It may protrude radially outward or inward.
- the inner and outer diameters of the light emitting end face 232 are preferably the same as the inner and outer diameters of the base end face 61, but may be different.
- the light emitting end face 232 is preferably coaxial with the base end face 61, but may be eccentric.
- the light exit end face 232 is preferably circular, but may be non-circular (eg, elliptical).
- Proximal surface 61 of tube 60 is preferably circular, but may be modified to be non-circular (eg, elliptical).
- the light guide member 230 does not have to expand in diameter in the vicinity of the light emitting end surface 232 .
- the light guide member 230 may have a constant diameter or may have a reduced diameter in the vicinity of the light emitting end surface 232 .
- the light guide member 230 is inserted into the through hole 59 of the tubular member 52 .
- the base end surface 61 of the tube 60 may be recessed from the tip of the tubular member 52 . Therefore, regardless of the inner diameter of the tube 60, the opening diameter of the flow path (through hole 59) at the tip of the cylindrical member 52 (hereinafter referred to as the "tip opening diameter") It can be the same as that of the male connector provided at the proximal end of the tube (hereinafter referred to as "existing male connector"; see, for example, FIGS. 4A and 4B of Patent Document 2). It is easy to configure the connector 250 (particularly the connector portion 51) to which the adapter 2 is applied so as to be compatible with existing male connectors.
- the adapter 2 of the second embodiment can also be applied to the connector 50 (see FIGS. 2A and 2B) in which the tube 60 extends to the tip of the cylindrical member 52 described in the first embodiment.
- the projection length of the light guide member 230 into the second connection tube 21 is shortened.
- the light guide member 230 may protrude into the lumen of the first connection tube 211 so that the light incident end face 231 approaches the light source 78 .
- a portion of the light guide member 230 inside the first connection tube 211 may have a substantially truncated cone shape similar to the light guide member 30 of the first embodiment. This allows more light to enter the light guide member 230 through the large-area light entrance end face 231 .
- Embodiment 2 is the same as Embodiment 1 except for the above.
- the description of the first embodiment also applies to the second embodiment.
- FIG. 6A is a perspective view showing the adapter 3 according to Embodiment 3 of the present invention and the connector 250 provided at the proximal end of the tube 60.
- FIG. 6B is a cross-sectional view of FIG. 6A along a plane containing the axis (not shown) of adapter 3 and connector 250.
- FIG. The adapter 3 of the third embodiment will be described, focusing on the differences from the first and second embodiments.
- the adapter 3 has a first connection portion 10 at one end and a second connection portion 20 at the other end.
- the first connection portion 10 and the second connection portion 20 are arranged coaxially.
- the first connection portion 10 includes a hollow cylindrical first connection tube 311 .
- the outer peripheral surface of the first connecting tube 311 is a cylindrical surface having a constant outer diameter in the axial direction, like the first connecting tube 11 of the first embodiment.
- the outer peripheral surface of the first connection tube 311 is not limited to this. It can be a face.
- the adapter 3 further includes a light guide member 330.
- the light guide member 330 has an elongated rod shape (substantially cylindrical shape) and extends coaxially with the adapter 3 .
- the light guide member 330 includes a light incident end surface 331 and a light emitting end surface 332 facing opposite sides in the axial direction, and a side surface 333 connecting the light incident end surface 331 and the light emitting end surface 332 . Both the light incident end face 331 and the light emitting end face 332 are flat faces perpendicular to the axis of the adapter 3 .
- the light incident end surface 331 faces the tip side of the first connecting portion 10 (the side opposite to the second connecting portion 20 ), and the light emitting end surface 332 faces the side opposite to the first connecting portion 10 .
- the side surface 333 is a cylindrical surface whose outer diameter is constant in the axial direction.
- the light guide member 330 is fitted into the first connection tube 311 with the side surface 333 in close contact with the inner peripheral surface of the first connection tube 311 with substantially no gap.
- the light incident end surface 331 forms a plane in common with the tip end surface 312 of the first connecting portion 10 (or the first connecting tube 311).
- the light guide member 330 axially protrudes from the second connection tube 21 of the second connection portion 20 toward the side opposite to the first connection portion 10 .
- the second connection tube 21 is radially separated from the light guide member 330 and surrounds the light guide member 330 .
- the adapter 3 is composed of two parts, a light guide member 330 and a portion other than the light guide member 330 (adapter main body 301).
- the adapter main body 301 is made of a material having mechanical strength (rigidity) to the extent that it is not substantially deformed by an external force.
- the material that can be used for the adapter body 301 of the first embodiment can be used as the material for the adapter body 301 of the third embodiment.
- the light guide member 330 is made of a light-guiding material (light-guiding material) so that light can enter from the light-incident end surface 331 , pass through the light-guiding member 330 , and exit from the light-emitting end surface 332 . ).
- the light guide material that can be used for the light guide member 30 of Embodiment 1 can be used as the light guide material for the light guide member 330 .
- the means for reducing leakage light from the side surface 33 of the light guide member 30 described in the first embodiment can also be applied to the light guide member 330 in the same manner.
- the method for integrating the light guide member 330 with the adapter main body 301 is not limited. 311, or manufacturing one of the light guide member 330 and the adapter main body 301 and then integrating the other with the above one by two-color molding.
- the connector 250 and tube 60 are the same as the connector 250 and tube 60 of Embodiment 2 (see FIGS. 4A and 4B).
- FIG. 7 is a cross-sectional view showing a state in which the connector 250 is connected to the light source device 70 via the adapter 3.
- the light source device 70 is the same as in the first embodiment.
- the first connection portion 10 of the adapter 3 is inserted into the holding portion 71 until the tip of the first connection tube 311 contacts the step surface 73 .
- the holding cylinder 72 positions the first connecting portion 10 (or the light guide member 330 ) coaxially with the light source 78 .
- the stepped surface 73 positions the first connecting portion 10 (or the light guide member 330 ) at a predetermined distance from the light source 78 in the axial direction.
- a light incident end surface 331 of the light guide member 330 faces the light source 78 .
- the second connection portion 20 (or the second connection tube 21) of the adapter 3 is connected to the connector 250 in the same manner as in the first embodiment.
- the male tapered surface 53 of the tubular member 52 is tapered and fitted to the female tapered surface 23 of the second connection tube 21 .
- the light guide member 330 is inserted into the through hole 59 of the tubular member 52 .
- Light guide member 330 is positioned coaxially with tube 60 .
- the light emitting end surface 332 of the light guide member 330 axially faces the proximal end surface 61 of the tube 60 , is close to the proximal end surface 61 , and preferably abuts.
- the light source 78 emits light toward the light incident end surface 331 of the light guide member 330 .
- Light emitted from the light source 78 enters the light incident end surface 331 , passes through the light guide member 330 , exits from the light emitting end surface 332 , and enters the base end surface 61 of the tube 60 .
- the method of using the adapter 3 of the third embodiment is the same as that of the first embodiment.
- the tip 65 (see FIG. 1) of the tube 60 can be illuminated using the tube 60 itself as a light guide path. Therefore, the position of the tip 65 of the tube 60 can be detected safely, easily and accurately. Since there is no need to directly connect the connector 250 to the light source device 70, cross infection can be prevented.
- the adapter 3 includes a light guide member 330 that guides the light emitted from the light source 78 to the base end surface 61 of the tube 60 . Therefore, the light from the light source 78 can be efficiently incident on the tube 60 . This is advantageous for improving the brightness (luminous flux) of tip 65 of tube 60 .
- the light guide member 330 has a cylindrical shape with a side surface 333 that is a cylindrical surface and both end surfaces 331 and 332 that are flat surfaces. Since light guide member 330 has such a simple rod shape, manufacturing of light guide member 330 is easy. This is advantageous for cost reduction of the adapter 3 .
- the shape of the light guide member 330 is not limited to the above.
- the light incident end surface 331 may be a convex curved surface similar to the light incident end surface 231 of the second embodiment, or may be a concave curved surface.
- the light emitting end face 332 may be an annular flat face with a recess 234 formed in the center, similar to the light emitting end face 232 of the second embodiment.
- the light emitting end surface 332 may be the concave curved surface or convex curved surface described as being applicable to the light emitting end surface 232 in the second embodiment.
- the light emitting end surface 332 may have a lens function that refracts the light emitted from the light guide member 330 so as to converge on the annular base end surface 61 .
- the side surface 333 of the light guide member 330 may have a shape other than a cylindrical surface.
- the light guide member 330 may have a substantially truncated cone shape with a larger diameter toward the light incident end face 331 inside the first connecting tube 311 .
- the light incident end surface 331 similarly to the light guide member 30 of the first embodiment, has a larger area than the light emitting end surface 332 . This is advantageous for improving the brightness (luminous flux) at the tip 65 of tube 60 .
- the light guide member 330 may have an enlarged diameter in the vicinity of the light emitting end surface 332, similar to the light guide member 230 (see FIG. 4B) of the second embodiment, or may have a reduced diameter.
- the adapter 3 does not have the lens 237 (see FIGS. 4B and 5) that the adapter 2 of the second embodiment has. Therefore, the number of parts constituting the adapter 3 is reduced.
- the adapter 3 has a simple configuration and is easy to manufacture. This is advantageous for cost reduction of the adapter 3 .
- the light source 78 may include a lens and/or the light source device 70 may include the light source 78 and the light guide member 330 so that the light from the light source 78 is efficiently incident on the light incident end surface 331 of the light guide member 330 .
- a lens may be provided between
- the light incident end face 331 is arranged at the same axial position as the tip end face 312 of the first connecting portion 10 (first connecting tube 311), but the present invention is not limited to this.
- the light incident end surface 331 may protrude or retreat in the axial direction with respect to the tip of the first connection tube 311 .
- the first connection tube 311 need not be in close contact with the side surface 333 of the light guide member 330.
- the first connection tube 311 may have a hollow cylindrical shape like the first connection tube 211 of the second embodiment, and may be radially spaced apart from the side surface 333 of the light guide member 330 .
- At least a part of the light emitting end surface 332 of the light guide member 330 is preferably axially opposed to the base end surface 61 of the tube 60 .
- a portion of the light emitting end face 332 may protrude radially outward from the base end face 61, and a portion of the base end face 61 may extend radially from the light emitting end face 332. may protrude outside the
- the outer diameter of the light emitting end surface 332 is preferably the same as the outer diameter of the base end surface 61, but may be different.
- the light emitting end face 332 is preferably coaxial with the base end face 61, but may be eccentric.
- the light exit end face 332 is preferably circular, but may be non-circular (eg, elliptical).
- Proximal surface 61 of tube 60 is preferably circular, but may be modified to be non-circular (eg, elliptical).
- the light guide member 330 is inserted into the through hole 59 of the cylindrical member 52 when the connector 250 is connected to the second connection portion 20 .
- the opening diameter (tip opening diameter) of the flow path (through hole 59) at the tip of the cylindrical member 52 can be adjusted to the proximal end of a conventional nasal tube used for tube feeding.
- the adapter 3 of Embodiment 3 can also be applied to the connector 50 (see FIGS. 2A and 2B) in which the tube 60 extends to the tip of the cylindrical member 52 described in Embodiment 1.
- the projection length of the light guide member 330 into the second connection tube 21 is shortened.
- Embodiment 3 is the same as Embodiments 1 and 2 except for the above.
- the descriptions of the first and second embodiments applicable to the third embodiment also apply to the third embodiment.
- FIG. 8 is a cross-sectional view showing a state in which the connector 450 is connected to the light source device 70 via the adapter 4 according to Embodiment 4 of the present invention.
- Adapter 4 is substantially the same as adapter 2 of the second embodiment.
- the light source device 70 is the same as in the first to third embodiments.
- the connector 450 of the fourth embodiment does not include the outer cylinder 56, female screw 57, and flange 55 that the connector 250 of the second embodiment has.
- the tubular member 452 of the connector 450 is fitted into the second connection tube 21, and the adapter 4 (especially the second connection portion 20) is connected to the connector portion 451 (especially the tubular member 452) by the frictional force between them.
- the connector portion 51 is configured to be compatible with existing male connectors used for tube feeding (see, for example, FIGS. 4A and 4B of Patent Document 2).
- the connector portion 451 may be a female connector having a cylindrical member 452 as a female member.
- an arbitrary male member is inserted into and removed from the lumen (through hole 59) of the cylindrical member 452.
- the inner peripheral surface of the cylindrical member 452 may be provided with a female tapered surface whose inner diameter increases toward the tip of the cylindrical member 452 .
- the female tapered surface can be configured to taper-fit with a male tapered surface provided on the outer peripheral surface of the male member.
- a tube 60 provided with a connector 450 having a female connector 451 may be used, for example, as a urinary catheter or a tracheal intubation catheter.
- the fourth embodiment is the same as the second embodiment except for the above.
- the description of the second embodiment (and the description of the first embodiment applicable to the second embodiment) also applies to the fourth embodiment.
- the adapter 3 of Embodiment 3 may be connected to the connector 450 .
- FIG. 9A is a perspective view showing an adapter 5 according to Embodiment 5 of the present invention and a connector 50 provided at the proximal end of a tube 60.
- FIG. 9B and 9C are cross-sectional views of FIG. 9A along a plane containing the axis of adapter 5 (not shown). The cross section of FIG. 9B and the cross section of FIG. 9C are perpendicular to each other on the axis of the adapter 5 .
- the adapter 5 of the fifth embodiment will be described, focusing on the differences from the first to third embodiments.
- the adapter 5 has a first connection portion 10 at one end and a second connection portion 20 at the other end.
- the first connection portion 10 and the second connection portion 20 are arranged coaxially.
- the first connection portion 10 includes a hollow cylindrical first connection tube 511 .
- the outer peripheral surface of the first connecting tube 511 is a cylindrical surface having a constant outer diameter in the axial direction, like the first connecting tube 11 of the first embodiment.
- the outer peripheral surface of the first connecting tube 511 is not limited to this. It can be a face.
- the outer peripheral surface of the first connection tube 511 is provided with an annular concave portion (annular groove) 515 that is continuous in the circumferential direction over the entire circumference.
- the first connection portion 10 and the second connection portion 20 are separated in the axial direction, and an intermediate portion 40 is provided between them.
- the intermediate portion 40 includes a hollow cylindrical intermediate tube 41 .
- the first connecting tube 511 and the intermediate tube 41 are provided with continuous through holes along the axis of the adapter 5 .
- the outer peripheral surface of the intermediate portion 40 (or the intermediate cylinder 41) is, but not limited to, a cylindrical surface having approximately the same diameter as that of the first connection cylinder 511. As shown in FIG. However, a tapered surface 43 and a pair of gripping surfaces 45 are provided on the outer peripheral surface of the intermediate portion 40 by notching (or scraping off) the cylindrical surface of the intermediate portion 40 (see FIG. 9C).
- the tapered surface 43 is a conical surface whose outer diameter decreases toward the second connection portion 20 .
- a pair of gripping surfaces 45 are symmetrical with respect to the axis of the adapter 5 .
- Each gripping surface 45 is composed of a first flat surface 45a on the first connection portion 10 side and a second flat surface 45b on the second connection portion 20 side.
- the pair of first flat surfaces 45a are inclined such that the distance therebetween decreases toward the first connecting portion 10.
- the pair of second flat surfaces 45b are parallel to each other.
- a raised surface (first raised surface) 46 is provided adjacent to the first flat surface 45a on the first connecting portion 10 side.
- the raised surface 46 is inclined so as to protrude radially outward toward the first connecting portion 10 side.
- a raised surface (second raised surface) 47 is provided adjacent to the tapered surface 43 and the second flat surface 45b on the second connecting portion 20 side.
- the raised surface 47 is inclined so as to protrude radially outward toward the second connecting portion 20 side.
- the raised surface 47 is annularly continuous over the entire circumference in the circumferential direction.
- the adapter 5 further includes a light guide member 530.
- the light guide member 530 has an elongated rod shape (substantially cylindrical shape) and extends coaxially with the adapter 5 .
- the light guide member 530 includes a light incident end surface 531 and a light emitting end surface 532 facing opposite sides in the axial direction, and a side surface 533 connecting the light incident end surface 531 and the light emitting end surface 532 . Both the light incident end face 531 and the light emitting end face 532 are flat faces perpendicular to the axis of the adapter 5 .
- the light incident end surface 531 faces the side opposite to the second connecting portion 20 and is a flat surface perpendicular to the axis of the adapter 5 in the fifth embodiment.
- the light guide member 530 axially protrudes from the distal end surface 512 of the first connection portion 10 (or the first connection tube 511).
- the light emitting end surface 532 faces the side opposite to the first connecting portion 10 .
- the light guide member 530 does not substantially protrude into the second connection tube 21 .
- the side surface 533 is a cylindrical surface whose outer diameter is constant in the axial direction. The light guide member 530 is fitted into the adapter main body 501 with the side surface 533 (excluding the portion protruding from the tip surface 512) in close contact with the inner peripheral surface of the through hole of the adapter main body 501 with substantially no gap.
- the adapter 5 is composed of two parts, a light guide member 530 and a portion other than the light guide member 530 (adapter main body 501).
- the adapter main body 501 is made of a material having such mechanical strength (rigidity) as not to be substantially deformed by an external force.
- the material that can be used for the adapter body 101 of the first embodiment can be used as the material for the adapter body 501 of the fifth embodiment.
- the light guide member 530 is made of a light-guiding material (light-guiding material) so that light can enter from the light-incident end surface 531 , pass through the light-guiding member 530 , and exit from the light-emitting end surface 532 . ).
- the light guide material that can be used for the light guide member 30 of Embodiment 1 can be used as the light guide material for the light guide member 530 .
- the means for reducing the leakage light from the side surface 33 of the light guide member 30 described in the first embodiment can be applied to the light guide member 530 as well.
- the method of integrating the light guide member 530 with the adapter main body 501 is not limited. or a method of manufacturing one of the light guide member 530 and the adapter main body 501 and then integrating the other with the one by two-color molding.
- the connector 50 and tube 60 are the same as the connector 50 and tube 60 of Embodiment 1 (see FIGS. 2A and 2B).
- FIG. 10 is a cross-sectional view showing a state in which the connector 50 is connected to the light source device 570 via the adapter 5.
- FIG. 10 is a cross-sectional view showing a state in which the connector 50 is connected to the light source device 570 via the adapter 5.
- the light source device 570 includes a holding portion 571 that accommodates and holds the first connection portion 10 (first connection tube 511 ), and a light source 78 arranged at a position deeper than the holding portion 571 .
- the holding portion 571 includes a holding tube 572 and a bottom plate 573 .
- the inner peripheral surface of the holding tube 572 is a cylindrical surface having approximately the same diameter as the first connecting tube 511 .
- Four protrusions 575 (only two protrusions 575 are visible in FIG. 10) protrude radially inward from the inner peripheral surface of the holding cylinder 572 .
- the four convex portions 575 are arranged at equal angular intervals in the circumferential direction.
- the bottom plate 573 is provided at a predetermined distance from the open end of the holding cylinder 572 so as to protrude radially inward from the inner peripheral surface of the holding cylinder 572 .
- a through hole 576 is provided in the center of the bottom plate 573 so as to penetrate the bottom plate 573 in the axial direction.
- the light source 78 is arranged coaxially with the through hole 576 (or the holding portion 571).
- the first connecting portion 10 of the adapter 5 is inserted into the holding portion 571 until the distal end surface 512 of the first connecting tube 511 abuts or approaches the bottom plate 573 .
- the projection 575 of the holding cylinder 572 fits into the annular recess 515 of the first connection part 10 (or the first connection cylinder 511 ), thereby locking the adapter 5 to the light source device 570 .
- the convex portion 575 and/or the bottom plate 573 position the first connection portion 10 (or the light guide member 530 ) at a predetermined axial distance from the light source 78 .
- a light guide member 530 protruding from the distal end surface 512 of the first connection portion 10 (first connection cylinder 511 ) is fitted into the through hole 576 of the bottom plate 573 .
- the inner peripheral surface of the through hole 576 defining the through hole 576 positions the light guide member 530 coaxially with the light source 78 .
- a light incident end surface 531 of the light guide member 530 faces the light source 78 .
- the second connection portion 20 (or the second connection tube 21) of the adapter 5 is connected to the connector 50 in the same manner as in the first embodiment.
- the male tapered surface 53 of the tubular member 52 is tapered and fitted to the female tapered surface 23 of the second connection tube 21 .
- the light emitting end face 532 of the light guide member 530 axially faces the proximal end face 61 of the tube 60 , is close to the proximal end face 61 , and preferably abuts thereon.
- the light source 78 emits light toward the light incident end surface 531 of the light guide member 530 .
- Light emitted from the light source 78 enters the light incident end surface 531 , passes through the light guide member 530 , exits from the light emitting end surface 532 , and enters the base end surface 61 of the tube 60 .
- the method of using the adapter 5 of the fifth embodiment is the same as that of the first embodiment.
- the tip 65 (see FIG. 1) of the tube 60 can emit light using the tube 60 itself as a light guide path. Therefore, the position of the tip 65 of the tube 60 can be detected safely, easily and accurately. Since there is no need to directly connect the connector 50 to the light source device 70, cross infection can be prevented.
- the adapter 5 has a light guide member 530 that guides the light emitted from the light source 78 to the base end surface 61 of the tube 60 . Therefore, the light from the light source 78 can be efficiently incident on the tube 60 . This is advantageous for improving the brightness (luminous flux) of tip 65 of tube 60 .
- a side surface 533 of the light guide member 530 protrudes from the tip surface 512 of the first connection portion 10 (first connection tube 511).
- a protruding side surface 533 of the light guide member 530 radially faces the inner peripheral surface of the through hole 576 defining the through hole 576 of the light source device 570 .
- the light guide member 530 is axially aligned with the light source 78 (see FIG. 10). Since the axial alignment is performed using the light guide member 530 having the light incident end surface 531 on which the light from the light source 78 is incident, the eccentricity of the light guide member 530 (or the light incident end surface 531) with respect to the light source 78 can be reduced. Since this makes it possible to increase the amount of light incident on the light guide member 530 , it is advantageous for improving the brightness (luminous flux) of the tip 65 of the tube 60 .
- the side surface 533 of the light guide member 530 protruding from the tip surface 512 is a cylindrical surface
- the inner peripheral surface of the through hole 576 is also a cylindrical surface.
- the present invention is not limited to this.
- the side surface 533 of the light guide member 530 protruding from the tip surface 512 may be a tapered surface (conical surface) whose outer diameter decreases as it approaches the light incident end surface 531 .
- the inner peripheral surface of the through hole 576 may be a tapered surface (conical surface) whose inner diameter increases with increasing distance from the light source 78 .
- the light guide member 530 and the inner peripheral surface of the through hole 576 are fitted with a cylindrical surface and a tapered surface or fitted with a tapered surface (so-called taper fitting). This is advantageous for reducing the eccentricity of light guide member 530 (or light incident end surface 531 ) with respect to light source 78 .
- the light guide member 530 does not have to protrude from the distal end surface 512 of the first connecting portion 10 .
- the first connecting portion 10 (or the light guide member 530) may be axially aligned with the light source 78 as in the first embodiment.
- the adapter 5 When the adapter 5 (first connecting portion 10 ) is connected to the light source device 570 , the convex portion 575 of the light source device 570 is engaged with the annular concave portion 515 of the adapter 5 . This prevents the adapter 5 from falling off from the light source device 570 when a tensile force is applied between the adapter 5 and the light source device 570, and maintains a stable connection of the adapter 5 to the light source device 570. It is advantageous for The adapter 5 is prevented from axially moving (especially separated) with respect to the light source device 570 , and the adapter 5 is positioned and held at a predetermined position in the axial direction of the light source device 570 . The user can easily know that the adapter 5 (first connecting portion 10) is properly connected to the light source device 570 by feeling a click feeling (or clicking sound) generated when the engagement is performed. can be confirmed.
- the adapter 5 can be connected to the light source device 570 simply by inserting the first connecting portion 10 of the adapter 5 into the light source device 570 . Further, after connecting the adapter 5 to the light source device 570 , the light source device 570 can be rotated with respect to the adapter 5 . Therefore, the rotational position of the light source device 570 can be adjusted without twisting the tube 60 .
- the engaging structures provided on the adapter 5 and the light source device 570 that engage with each other are the convex portion 575 and the annular concave portion 515 .
- the engagement structure of the present invention is not limited to this.
- the engagement structure provided on each of the adapter and the light source device may be a convex portion and a concave portion that engage with each other, or a convex portion and a convex portion that engage with each other.
- the adapter may be provided with either the protrusion or the recess.
- the protrusions and/or recesses may extend annularly over the entire circumference, or may be circumferentially segmented (ie, non-annular). The number of non-annular protrusions and/or recesses may be one or more.
- the protrusions and/or recesses may be movable (eg, move radially) by being supported by elastically deformable members (eg, compression coil springs, bendable arms).
- the adapter 5 and the light source device 570 may not be provided with engaging structures (the convex portion 575 and the annular concave portion 515) that engage with each other.
- the adapters and light source devices of Embodiments 1 to 4 may be provided with engagement structures that engage with each other, similar to Embodiment 5.
- the adapter 5 has an intermediate portion 40 between the first connection portion 10 and the second connection portion 20 .
- the connector 50 and the light source device 570 are separated, and the intermediate portion 40 is separated. exposed to the outside world.
- the intermediate portion 40 can be gripped by the user when handling the adapter 5 .
- the possibility of the user touching the first connection portion 10 and the second connection portion 20 is reduced. This is advantageous in reducing the possibility of contamination of the first connection part 10 and the second connection part 20 by the user's fingers.
- the intermediate portion 40 When the user grips the intermediate portion 40 with their fingers, the user can grip the grip surface 45 with their fingers. This allows the adapter 5 to be gripped stably and facilitates the application of axial and/or rotational forces to the adapter 5 .
- the intermediate portion 40 is provided with two gripping surfaces 45 axially symmetrical.
- the grip surface of the present invention is not limited to this.
- the number of gripping surfaces is not limited to two, and may be more. In general, it is preferred that an even number of gripping surfaces are arranged to form a regular polygon (eg, square, regular hexagon, etc.) in cross-section along a plane perpendicular to the axis of the adapter 5 .
- the grip surface 45 is preferably configured as a flat surface.
- the gripping surface is not limited to an exact flat surface.
- the gripping surface may be, for example, a convex curved surface or a concave curved surface.
- the grip surface may be provided with a plurality of ribs, a plurality of protrusions, or the like for slip prevention. It is preferable that the gripping surface be configured so as to be distinguishable from the outer peripheral surface (cylindrical surface or tapered surface) of the intermediate portion 40 .
- each gripping surface 45 is composed of two flat surfaces 45a and 45b with different inclinations.
- the grip surface of the present invention is not limited to this.
- Each gripping surface may consist of a single surface, or may consist of three or more surfaces.
- the surface forming the gripping surface may be parallel to the axis of the adapter 5 or may be inclined.
- the gripping surface 45 is provided by notching the outer peripheral surface of the intermediate portion 40 .
- the grip surface of the present invention is not limited to this.
- the gripping surface may be provided so as to protrude radially outward from the outer peripheral surface of the intermediate portion 40 .
- a pair of plates parallel to the axis of the adapter 5 are protruded radially outward from the outer peripheral surface of the intermediate portion 40. may be provided and the surface of the plate may be used as a gripping surface.
- the raised surfaces 46 and 47 adjacent to the gripping surface 45 axially regulate the position at which the fingers grip the intermediate portion 40 so that the fingers gripping the gripping surface 45 do not protrude from the gripping surface 45 in the axial direction. It functions as a "gripping position regulating structure".
- the raised surfaces 46 and 47 as gripping position regulating structures facilitate applying axial force to the adapter 5 when connecting the adapter 5 to the connector 50 and the light source device 570 .
- the raised surfaces 46, 47 also reduce the likelihood that a user will touch the first connection portion 10 and the second connection portion 20 when handling the adapter 5, thereby allowing the first connection portion 10 and the second connection portion 20 is less likely to be contaminated by the user's finger.
- the inclination of the raised surfaces 46, 47 with respect to the axis of the cross section including the axis of the adapter 5 is arbitrary.
- the raised surfaces 46 and 47 preferably extend along the circumferential direction, and may be annularly continuous over the entire circumference in the circumferential direction.
- the raised surfaces 46, 47 are preferably axially adjacent to the area to be gripped by the fingers (gripping surface 45).
- the gripping surface 45 may be omitted, and raised surfaces 46 and 47 may be provided on the outer peripheral surface of the intermediate portion 40 so as to face each other in the axial direction and be spaced apart from each other.
- the raised surfaces 46 and 47 can function as a gripping position regulating structure.
- one or both of the raised surfaces 46 and 47 may not be provided on the adapter 5 .
- the tapered surface 43 may not be provided on the adapter 5 .
- the intermediate portion 40 of Embodiment 5 may be applied to the adapters 1-4 of Embodiments 1-4.
- the intermediate portion 40 of the adapters 1-4 may be provided with the gripping surface and/or the raised surface of the fifth embodiment.
- the light guide member 530 has a cylindrical shape with a side surface 533 that is a cylindrical surface and both end surfaces 531 and 532 that are flat surfaces. Since light guide member 530 has such a simple rod shape, manufacturing of light guide member 530 is easy. This is advantageous for reducing the cost of the adapter 5 .
- the shape of the light guide member 530 is not limited to the above.
- the light incident end surface 531 may be a convex curved surface similar to the light incident end surface 231 of the second embodiment, or may be a concave curved surface.
- the light emitting end face 532 may be an annular flat face with a recess 234 formed in the center, similar to the light emitting end face 232 of the second embodiment.
- the light emitting end surface 532 may be the concave curved surface or convex curved surface described as being applicable to the light emitting end surface 232 in the second embodiment.
- the light emitting end face 532 may have a lens function to refract the light emitted from the light guide member 530 so as to converge on the annular base end face 61 .
- the side surface 533 of the light guide member 530 may have a shape other than a cylindrical surface.
- the light guide member 530 may have a substantially truncated cone shape with a larger diameter toward the light incident end face 531 inside the adapter main body 501 (or the first connection tube 511 ).
- the light incident end surface 531 similarly to the light guide member 30 of the first embodiment, has a larger area than the light emitting end surface 532 . This is advantageous for improving the brightness (luminous flux) at the tip 65 of tube 60 .
- the side surface 533 of the light guide member 530 protruding from the tip surface 512 is, as described above, a cylindrical surface or a tapered surface whose outer diameter decreases toward the light incident end surface 531 ( preferably a conical surface).
- the cross-sectional shape of the light guide member 530 along the plane perpendicular to the axial direction of the light guide member 530 is not limited to a circle.
- the cross-sectional shape of the light guide member 530 may be elliptical, polygonal (for example, triangular, quadrangular, or hexagonal.
- the corners of the polygon may be chamfered with arcs or straight lines), arcs (even if they are not exact arcs). It can have any shape, such as a shape in which both ends of the shape are connected by straight lines.
- the cross-sectional shape of the light guide member 530 does not need to be constant in the axial direction of the light guide member 530, and may vary.
- the adapter 5 does not have the lens 237 (see FIGS. 4B and 5) that the adapter 2 of the second embodiment has. Therefore, the number of parts constituting the adapter 5 is reduced.
- the adapter 5 has a simple configuration and is easy to manufacture. This is advantageous for reducing the cost of the adapter 5 .
- the light source 78 may include a lens and/or the light source device 570 may include the light source 78 and the light guide member 530 so that the light from the light source 78 is efficiently incident on the light incident end surface 531 of the light guide member 530 .
- a lens may be provided between
- the first connection tube 511 and the intermediate tube 41 do not need to be in close contact with the side surface 533 of the light guide member 530 .
- the first connection tube 511 and/or the intermediate tube 41 may be radially separated from the side surface 533 of the light guide member 530 .
- At least a part of the light emitting end face 532 of the light guide member 530 is preferably axially opposed to the base end face 61 of the tube 60 .
- a portion of the light emitting end face 532 may protrude radially outward from the proximal end face 61, and a portion of the proximal end face 61 may radially extend from the light emitting end face 532. may protrude outside the
- the outer diameter of the light emitting end surface 532 is preferably the same as the outer diameter of the base end surface 61, but may be different.
- the light emitting end face 532 is preferably coaxial with the base end face 61, but may be eccentric.
- the light exit end face 532 is preferably circular, but may be non-circular (eg, elliptical).
- Proximal surface 61 of tube 60 is preferably circular, but may be non-circular (e.g., elliptical, polygonal (e.g., triangular, square, hexagonal; polygonal corners may be arcuately curved)). may be transformed into
- the light guide member 530 when the connector 50 is connected to the second connecting portion 20, the light guide member 530 is not inserted into the cylindrical member 52.
- the light guide member 530 may axially face the tip of the tubular member 52 . This is advantageous for simplifying the construction of the adapter 5. FIG. Therefore, it is possible to easily optically couple the light guide member 530 and the tube 60 using the simple and inexpensive adapter 5 .
- the adapter 5 of Embodiment 5 may be configured to be connectable to the connector 250 of Embodiments 2 and 3 and the connector 450 of Embodiment 4.
- the light guide member 530 may be configured to be inserted into the through hole 59 of the cylindrical member 52 of the connector (250, 450).
- the light emitting end face 532 and its vicinity may be configured in the same manner as the light guide members of the second to fourth embodiments.
- Embodiment 5 is the same as Embodiments 1 to 4 except for the above.
- the descriptions of the first to fourth embodiments applicable to the fifth embodiment also apply to the fifth embodiment.
- connection structure between the adapter and the light source device of the present invention is not limited to Embodiments 1 to 5 above.
- the holding tube (72, 572) of the light source device (70, 570) is such that the first connection tube (11, 211, 311, 511) is fitted into the holding tube (72, 572).
- the present invention is not limited to this.
- the light source device does not have to include the holding tube (72, 572) into which the first connection tube (11, 211, 311, 511) is fitted.
- the tip of the first connection tube (11, 211, 311, 511) is in contact with a flat surface equivalent to the step surface 73 or the bottom plate 573 provided on the light source device, and the adapter is attached to the light source device. can be connected.
- the flat surface positions the first connecting portion 10 (or the light guide member (30, 230, 330, 530)) at a predetermined axial distance from the light source 78.
- a light source device without a holding cylinder (72, 572) has a simple structure and is easy to manufacture.
- the method for maintaining the connection state of the adapter with respect to the light source device is not limited, and can be arbitrarily selected, for example, a method using an elastic band, a method using magnetic attraction force, or the like.
- connection structure between the adapter and the connector of the present invention is not limited to the above embodiments 1-5.
- the female taper surface 23 of the second connecting portion 20 of the adapter is taper-fitted to the male taper surface 53 of the connector, but the second connecting portion 20 is fitted to the connector by a fitting method other than taper fitting.
- You may have the fitting structure which fits in.
- the inner peripheral surface of the second connecting tube 21 may have a female tapered surface or a cylindrical surface having a different taper angle from the male tapered surface 53 of the connector.
- the outer peripheral surface of the tubular member (52, 452) of the connector may have a cylindrical surface.
- the inner peripheral surface of the second connection tube 21 can be fitted to the outer peripheral surface of the tubular member (52, 452) by a fitting method other than taper fitting.
- the second connection portion 20 of the adapter may be configured to fit with a portion other than the outer peripheral surface of the tubular member (52, 452) of the connector.
- the light guide member (30, 230, 330, 530) may consist of a single optical fiber or a plurality of optical fibers (optical fiber bundle) substantially along the axis of the adapter. In this case, light from light source 78 enters proximal end face 61 of tube 60 after passing through one or more optical fibers.
- the light-guiding tube is led out from the base tube of the connector toward the side opposite to the tubular member
- the tube 60 extends from the base tube 58 in appearance. It does not imply that the proximal face 61 of the tube 60 is located within the base tube 58 . That is, in the present invention, the insertion depth of the tube 60 into the connector is arbitrary. It may be inserted deep into 450 .
- the inner diameter of the through hole 59 of the tubular member of the connector to which the adapter of the present invention is connected may be constant or may vary in the axial direction of the connector.
- the diameter (inner diameter and/or outer diameter) of tube 60 may be constant or may vary within the connector.
- the present invention can be widely used as an adapter for connecting a connector provided at the proximal end of a medical tube inserted into a patient to a light source device.
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Abstract
Description
本発明を経鼻経管栄養に適用した実施形態を説明する。図1に示すように、経鼻チューブ(以下、単に「チューブ」という)60の基端にコネクタ50が設けられている。チューブ60は患者90の鼻腔から挿入され、チューブ60の先端65は胃91に達している。チューブ60は、自由に湾曲変形が可能な可撓性を有している。チューブ60は、その全長にわたって連続する流路69(後述する図2B参照)が形成された中空の筒状物である。経管栄養を行う際、液状の栄養剤は、コネクタ50及びチューブ60を通って患者の胃91に投与される。コネクタ50は、本発明の実施形態1にかかるアダプタ1を介して光源装置70に繰り返し接続及び分離が可能である。コネクタ50をアダプタ1を介して光源装置70に接続したとき、光源装置70に内蔵された光源78(後述する図3参照)からの光は、アダプタ1、コネクタ50及びチューブ60を順に通過してチューブ60の先端65から出射する。先端65からの光は患者90の身体を透過して体表面を光らせる。術者は、患者90の体表面での発光位置からチューブ60の先端65の位置を確認することができる。
図4Aは、本発明の実施形態2にかかるアダプタ2と、チューブ60の基端に設けられたコネクタ250とを示した斜視図である。図4Bは、アダプタ2及びコネクタ250の軸(図示せず)を含む面に沿った図4Aの断面図である。実施形態1との相違を中心に、本実施形態2のアダプタ2を説明する。
図6Aは、本発明の実施形態3にかかるアダプタ3とチューブ60の基端に設けられたコネクタ250とを示した斜視図である。図6Bは、アダプタ3及びコネクタ250の軸(図示せず)を含む面に沿った図6Aの断面図である。実施形態1,2との相違を中心に、本実施形態3のアダプタ3を説明する。
図8は、本発明の実施形態4にかかるアダプタ4を介してコネクタ450を光源装置70に接続した状態を示した断面図である。アダプタ4は、実施形態2のアダプタ2と実質的に同じである。光源装置70は、実施形態1~3と同じである。本実施形態4のコネクタ450は、実施形態2のコネクタ250が備えていた外筒56、雌ネジ57、フランジ55を備えない。第2接続筒21にコネクタ450の筒部材452が嵌入し、両者の摩擦力によってアダプタ4(特に第2接続部20)がコネクタ部451(特に筒部材452)に接続されている。
図9Aは、本発明の実施形態5にかかるアダプタ5と、チューブ60の基端に設けられたコネクタ50とを示した斜視図である。図9B及び図9Cは、アダプタ5の軸(図示せず)を含む面に沿った図9Aの断面図である。図9Bの断面と図9Cの断面とは、アダプタ5の軸において直交する。実施形態1~3との相違を中心に、本実施形態5のアダプタ5を説明する。
10 第1接続部
11,211,311,511 第1接続筒
312,512 第1接続部(第1接続筒)の先端面
20 第2接続部
21 第2接続筒(嵌合構造)
30,230,330,530 導光部材
31,231,331,531 光入射端面
32,232,332,532 光出射端面
33,533 導光部材の側面
40 中間部
45 把持面
46,47 隆起面(把持位置規制構造)
50,250,450 コネクタ
52,452 筒部材
56 外筒
57 雌ネジ
58 基管
60 チューブ(導光性チューブ)
61 チューブの基端面
65 チューブの先端
69 チューブの流路
70 光源装置
237 レンズ
515 環状凹部(係合構造)
575 凸部(係合構造)
Claims (16)
- 柔軟な中空の導光性チューブの基端に設けられたコネクタを光源装置に接続するためのアダプタであって、
前記コネクタは、中空円筒形状の筒部材と、前記筒部材と同軸に配置された中空円筒形状の基管とを備え、前記導光性チューブが前記基管から前記筒部材とは反対側に向かって導出されており、
前記アダプタは、
前記光源装置に対して接続及び分離が可能な第1接続部と、
前記コネクタに対して接続及び分離が可能な第2接続部と、
前記光源装置から出射された光を前記導光性チューブの基端面に導く導光部材とを備えることを特徴とするアダプタ。 - 前記導光部材は、前記光源装置からの光が入射する光入射端面を備え、前記光入射端面に凸曲面が設けられている請求項1に記載のアダプタ。
- 前記導光部材は、前記導光性チューブの前記基端面に向かって光を出射する環状の光出射端面を備える請求項1又は2に記載のアダプタ。
- 前記導光部材は、前記導光性チューブの前記基端面に向かって光を出射する光出射端面を備え、
前記光出射端面は、光を前記導光性チューブの前記基端面に集光するためのレンズ機能を有する請求項1~3のいずれか一項に記載のアダプタ。 - 前記導光部材は、前記光源装置からの光が入射する光入射端面と、前記導光性チューブの前記基端面に向かって光を出射する光出射端面とを備え、
前記光入射端面は前記光出射端面より大きな面積を有する請求項1~4のいずれか一項に記載のアダプタ。 - 前記導光部材は、前記光源装置からの光が入射する光入射端面と、前記導光性チューブの前記基端面に向かって光を出射する光出射端面とを備え、
前記導光部材の外径は、前記光入射端面と前記光出射端面との間において一定である請求項1~4のいずれか一項に記載のアダプタ。 - 前記第2接続部を前記コネクタに接続したとき、前記導光部材は前記筒部材に軸方向に対向する請求項1~6のいずれか一項に記載のアダプタ。
- 前記第2接続部を前記コネクタに接続したとき、前記導光部材は前記筒部材に挿入される請求項1~6のいずれか一項に記載のアダプタ。
- 前記光源装置から出射された光を前記導光部材の光入射端面に集光するためのレンズを更に備える請求項8に記載のアダプタ。
- 前記導光部材の側面が、前記第1接続部の先端面から軸方向に突出している請求項1~8のいずれか一項に記載のアダプタ。
- 前記第1接続部が前記光源装置に接続されたときに前記光源装置に係合される係合構造を更に備える請求項1~10のいずれか一項に記載のアダプタ。
- 前記第1接続部と前記第2接続部との間に中間部を更に備える請求項1~11のいずれか一項に記載のアダプタ。
- 前記中間部に把持面が設けられている請求項12に記載のアダプタ。
- 前記中間部に、半径方向外向きに突出した隆起面が設けられている請求項12又は13に記載のアダプタ。
- 前記第2接続部は、前記コネクタに嵌合する嵌合構造を備える請求項1~14のいずれか一項に記載のアダプタ。
- 前記コネクタは、前記筒部材を取り囲む外筒と、前記外筒の前記筒部材に対向する内周面に設けられた雌ネジとを更に備える請求項1~15のいずれか一項に記載のアダプタ。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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CN202280011707.5A CN116783529A (zh) | 2021-02-02 | 2022-01-07 | 适配器 |
US18/263,645 US20240082559A1 (en) | 2021-02-02 | 2022-01-07 | Adapter |
KR1020237025604A KR20230137905A (ko) | 2021-02-02 | 2022-01-07 | 어댑터 |
JP2022579398A JPWO2022168529A1 (ja) | 2021-02-02 | 2022-01-07 | |
EP22749408.5A EP4290287A1 (en) | 2021-02-02 | 2022-01-07 | Adapter |
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JP2021-015261 | 2021-02-02 | ||
JP2021015261 | 2021-02-02 | ||
JP2021114764 | 2021-07-12 | ||
JP2021-114764 | 2021-07-12 |
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EP (1) | EP4290287A1 (ja) |
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WO2021024992A1 (ja) * | 2019-08-05 | 2021-02-11 | 株式会社ジェイ・エム・エス | 医療用チューブの先端位置検出システム |
-
2022
- 2022-01-07 EP EP22749408.5A patent/EP4290287A1/en active Pending
- 2022-01-07 US US18/263,645 patent/US20240082559A1/en active Pending
- 2022-01-07 WO PCT/JP2022/000408 patent/WO2022168529A1/ja active Application Filing
- 2022-01-07 JP JP2022579398A patent/JPWO2022168529A1/ja active Pending
- 2022-01-07 KR KR1020237025604A patent/KR20230137905A/ko unknown
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JPS6146513U (ja) * | 1984-08-30 | 1986-03-28 | セイコーインスツルメンツ株式会社 | 光結合装置 |
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US20240082559A1 (en) | 2024-03-14 |
KR20230137905A (ko) | 2023-10-05 |
JPWO2022168529A1 (ja) | 2022-08-11 |
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