JP5218560B2 - Connecting member, enteral nutrition administration set and enteral nutrition extension tube - Google Patents

Abstract

A substantially tubular male connector (100) having at one end an insertion portion (103) to be inserted into a tube and a proximal end portion (104) at the other end penetrates a lock part (200). The male connector is provided, on a part of the outer circumferential surface at the insertion portion (103), with at least one first abutting portion (130a, 130b) wherein the distance from the central axis increases relatively in a cross-section perpendicular to the central axis.  The lock part is provided, on the inner circumferential surface facing the male connector, with at least one second abutting portion (230a, 230b) wherein the distance from the central axis decreases relatively in a cross-section perpendicular to the central axis.  Consequently, a female connector and a male connector can be connected together firmly with a small number of components.

Description

  The present invention relates to a connection member for connecting a tube used for medical use, for example. Moreover, this invention relates to the enteral-nutrition administration set and enteral-nutrition extension tube provided with this connection member.

  Nutrients, liquid foods, drugs, etc. (generally referred to as “enteral nutrients” for patients who have difficulty in feeding food from the mouth to the stomach due to trauma of the esophagus or oral cavity, disease, or surgery. Enteral nutrition therapy is known as a method for administering a "liquid". In enteral nutrition therapy, a flexible tube (generally referred to as “enteral nutrition catheter”) is used to deliver a liquid to the patient's body. As a tube used for enteral nutrition therapy, the tube is inserted into the stomach or duodenum through the patient's nasal cavity, depending on the tube insertion route, and into the stomach through the gastric fistula formed on the patient's abdomen. A PEG (Percutaneous Endoscopic Gastrostomy) tube to be inserted, a PTEG (Percutaneus Trans Esophageal Gastro-tubing) tube to be inserted into the stomach through a hole formed in the base of a patient's neck, and the like are known. When performing enteral nutrition therapy, a tube connected at one end to a female connector at the other end of the tube inserted into the patient's body and to an outflow port such as a container (eg, pouch) filled with a liquid substance It is necessary to insert and connect the male connector at the downstream end of (for example, enteral nutrition administration set).

  By the way, if the viscosity of the liquid used for enteral nutrition therapy is low, the liquid in the stomach may flow back into the esophagus and cause pneumonia, or the liquid may not be absorbed by the body and diarrhea may occur. There is a problem. In order to prevent this problem, a liquid material whose viscosity has been increased by semi-solidifying or adding a thrombotic agent or a thickener is often used.

  In order to send such a high-viscosity liquid into the patient's body, pressure may be applied to the liquid using a syringe or a device for compressing a container filled with the liquid. . At this time, there is a problem that the female connector of the tube inserted into the patient's body and the male connector inserted therein are disconnected due to the pressure applied to the liquid. The problem of separation between the female connector and the male connector is not limited to the case where the liquid material described above is pumped, for example, when an external force is applied unintentionally to the connection portion between the female connector and the male connector. Also occurred.

  Patent Literature 1 describes a fastener for firmly connecting a female connector and a male connector of a flexible tube. The fastener includes a substantially cylindrical outer member and an inner member, both of which have a substantially C-shaped cross section. The inner member is inserted into the outer member. The outer peripheral surface of the inner member is eccentric so that the radial thickness gradually increases in the circumferential direction, and the inner peripheral surface of the outer member is along this eccentric outer peripheral surface of the inner member. An inner member and an outer member are sheathed on the outer peripheral surface of the female connector into which the male connector is inserted. When the outer member is rotated in the circumferential direction with respect to the inner member, the outer member is tightened so as to reduce the diameter of the inner member. As a result, since the female connector is compressed in the radial direction by the male connector and the inner member, the female connector and the male connector can be firmly connected.

JP 2007-190240 A

  However, since the fastener described in Patent Document 1 requires two parts, an outer member and an inner member, in addition to the female connector and the male connector, the parts may be lost or used for manufacturing and assembly. There were problems such as increased costs.

  An object of the present invention is to provide a connection member, an enteral nutrition administration set, and an enteral nutrition extension tube that can realize a strong connection between a tube (female connector) and a male connector with a small number of parts.

Connecting member of the present invention is a connecting member connectable to a tube for use in enteral nutrition therapy, comprising an insertion portion inserted into the tube at one end, a substantially cylindrical shape with the proximal end and the other end A male connector and a lock part penetrated by the male connector are provided. The male connector includes at least one first abutting portion whose distance from the central axis is relatively increased in a cross section perpendicular to the central axis on a part of the outer peripheral surface of the insertion portion. The lock part includes at least one second abutting portion whose distance from the central axis is relatively reduced in a cross section perpendicular to the central axis on an inner peripheral surface facing the male connector. One of the first contact portion and the second contact portion is a protrusion, and the outer peripheral surface of the male connector on which the other is formed, along the surface passing through the other and perpendicular to the central axis. Alternatively, the cross-sectional shape of the inner peripheral surface of the lock part is substantially elliptical.

  Both the enteral nutrition administration set and the enteral nutrition extension tube of the present invention include the connection member of the present invention at one end thereof.

  According to the present invention, the first contact portion of the male connector and the second contact portion of the lock part are pressed against the inner peripheral surface and the outer peripheral surface of the tube, respectively, so as to sandwich the tube. A strong connection with the tube can be realized.

  Further, apart from the male connector, only one part of the lock part is necessary, and since the lock part is penetrated through the male connector, there is little possibility of losing the lock part.

FIG. 1 is a perspective view of a male connector constituting a connection member according to Embodiment 1 of the present invention. 2A is a front view of the male connector constituting the connection member according to Embodiment 1 of the present invention, FIG. 2B is a side view thereof viewed from the direction of the arrow 2B in FIG. 2A, and FIG. 2C is a line 2C-2C in FIG. It is arrow sectional drawing. FIG. 3 is a perspective view of the lock parts constituting the connection member according to the first embodiment of the present invention. 4A is a front view of the lock part constituting the connection member according to the first embodiment of the present invention, FIG. 4B is a side view thereof viewed from the direction of arrow 4B in FIG. 4A, and FIG. 4C is viewed from the direction of arrow 4C in FIG. The top view and FIG. 4D are the bottom views seen from the direction of arrow 4D of FIG. 4A. FIG. 5 is a front view showing a state immediately before connecting the connection member according to Embodiment 1 of the present invention and the upstream end of the PEG tube. 6A is a cross-sectional view of the connection member according to Embodiment 1 of the present invention in which the lock part is in a lockable position with respect to the male connector, and FIG. 6B is a view of the present invention in which the lock part is in the retracted position with respect to the male connector. 3 is a cross-sectional view of a connection member according to Embodiment 1. FIG. 7A is a front view showing a state before the male connector of the connection member according to Embodiment 1 of the present invention is inserted into the upstream end of the PEG tube and before locking, and FIG. 7B is from the direction of arrow 7B in FIG. 7A. FIG. 8A is a cross-sectional view taken along line 8A-8A in FIG. 7B, FIG. 8B is a cross-sectional view taken along line 8B-8B in FIG. 7A, and FIG. 8C is an arrow taken along line 8C-8C in FIG. FIG. 9A is a front view showing a state in which the insertion portion of the male connector of the connection member according to Embodiment 1 of the present invention is inserted into the upstream end of the PEG tube and locked, and FIG. 9B is a view from the direction of the arrow 9B in FIG. 9A. FIG. 10A is a cross-sectional view taken along line 10A-10A in FIG. 9B, FIG. 10B is a cross-sectional view taken along line 10B-10B in FIG. 9A, and FIG. 10C is an arrow taken along line 10C-10C in FIG. FIG. 11A is a front view showing a state in which the insertion part of the male connector of the connecting member according to Embodiment 1 of the present invention in which the lock part is moved to the retracted position is inserted into the upstream end of the PEG tube, and FIG. 11B is FIG. It is the side view seen from the arrow 11B direction. 12A is a cross-sectional view taken along line 12A-12A in FIG. 11B, and FIG. 12B is a cross-sectional view taken along line 12B-12B in FIG. 11A. FIG. 13A is a cross-sectional view of another connecting member according to Embodiment 1 of the present invention along a plane passing through the first contact portion and the second contact portion, similarly to FIG. 8C. FIG. 13B is a cross-sectional view of still another connection member according to Embodiment 1 of the present invention along a plane passing through the first contact portion and the second contact portion, similarly to FIG. 8C. FIG. 13C is a cross-sectional view of still another connection member according to Embodiment 1 of the present invention along a plane passing through the first contact portion and the second contact portion, similarly to FIG. 8C. FIG. 13D is a cross-sectional view of still another connection member according to Embodiment 1 of the present invention along a plane passing through the first contact portion and the second contact portion, similarly to FIG. 8C. FIG. 13E is a cross-sectional view of still another connection member according to Embodiment 1 of the present invention along a plane passing through the first contact portion and the second contact portion, similarly to FIG. 8C. FIG. 14 is a perspective view of a male connector constituting a connection member according to Embodiment 2 of the present invention. 15A is a front view of the male connector constituting the connection member according to Embodiment 2 of the present invention, FIG. 15B is a side view thereof viewed from the direction of the arrow 15B in FIG. 15A, and FIG. 15C is a line 15C-15C in FIG. FIG. 15D is a sectional view taken along the line 15D-15D in FIG. 15A. FIG. 16 is a perspective view of the lock parts constituting the connection member according to the second embodiment of the present invention. 17A is a front view of a lock part that constitutes a connecting member according to Embodiment 2 of the present invention, FIG. 17B is a side view thereof viewed from the direction of arrow 17B in FIG. 17A, and FIG. 17C is viewed from the direction of arrow 17C in FIG. The top view and FIG. 17D are the bottom views seen from the arrow 17D direction of FIG. 17A. 18A is a cross-sectional view taken along line 18A-18A in FIG. 17A, and FIG. 18B is a cross-sectional view taken along line 18B-18B in FIG. 17A. FIG. 19 is a perspective view showing a state before the male connector of the connecting member according to the second embodiment of the present invention is inserted into the upstream end of the PEG tube and before locking. 20A is a front view showing a state before the male connector of the connecting member according to the second embodiment of the present invention is inserted into the upstream end of the PEG tube and before locking, and FIG. 20B is from the direction of the arrow 20B in FIG. 20A. FIG. 21A is a cross-sectional view taken along line 21A-21A in FIG. 20B, and FIG. 21B is a cross-sectional view taken along line 21B-21B in FIG. 20A. 22A is a cross-sectional view taken along line 22A-22A in FIG. 20A, and FIG. 22B is a cross-sectional view taken along line 22B-22B in FIG. 20A. FIG. 23 is a perspective view showing a state where the insertion portion of the male connector of the connection member according to Embodiment 2 of the present invention is inserted into the upstream end of the PEG tube and locked. 24A is a front view showing a state in which the insertion portion of the male connector of the connection member according to Embodiment 2 of the present invention is inserted into the upstream end of the PEG tube and locked, and FIG. 24B is a view from the direction of the arrow 24B in FIG. 24A. FIG. 25A is a cross-sectional view taken along line 25A-25A in FIG. 24B, and FIG. 25B is a cross-sectional view taken along line 25B-25B in FIG. 24A. 26A is a cross-sectional view taken along line 26A-26A in FIG. 24A, and FIG. 26B is a cross-sectional view taken along line 26B-26B in FIG. 24A.

  In the connection member of the present invention, it is preferable that a cross-sectional shape of the outer peripheral surface of the male connector along a plane that passes through the first contact portion and is perpendicular to the central axis is substantially elliptical. Thereby, the design of the male connector can be simplified.

  Moreover, it is preferable that the cross-sectional shape of the inner peripheral surface of the lock part passing through the second contact portion and along a plane perpendicular to the central axis is also substantially elliptical. Thereby, the design of the male connector can be simplified.

  Alternatively, at least one of the first contact portion and the second contact portion may be a protrusion. Thereby, since the clamping pressure by the 1st contact part and 2nd contact part with respect to a tube can be raised, higher connection strength can be obtained. Here, whether or not the first contact portion (or the second contact portion) is a “projection” is determined based on whether the first contact portion (or the second contact portion) is a cross section perpendicular to the central axis. However, it is judged whether or not it is raised (projected) specifically with respect to its surroundings.

  In this case, one of the first contact part and the second contact part is a projection, and the male connector in which the other is formed passing through the other and along a plane perpendicular to the central axis. The cross-sectional shape of the outer peripheral surface or the inner peripheral surface of the lock part may be substantially elliptical. By making the cross-sectional shape of one of the outer peripheral surface of the male connector and the inner peripheral surface of the lock part substantially elliptical, the design of the member can be simplified while obtaining higher connection strength.

  It is preferable that a plurality of the first contact portions are arranged at equiangular intervals with respect to the central axis. Thereby, more stable connection strength can be obtained.

  In the above, it is preferable that the same number of the second contact portions as the first contact portions are provided, and a plurality of the second contact portions are arranged at equiangular intervals with respect to the central axis. Thereby, since the tube can be clamped at a plurality of positions at equiangular intervals, a stable and high connection strength can always be obtained.

  In the male connector, the first contact portion may be provided at two or more positions different in the central axis direction. In the lock part, the second contact portion may be provided in the central axis direction. You may be provided in two or more places from which a position differs. Thereby, connection strength can further be improved.

  In this case, when viewed along the central axis, the positions around the central axis of the first contact portions provided at two or more different positions in the central axis direction are preferably different from each other, When viewed along, it is preferable that the positions around the central axis of the second abutting portions provided at two or more different positions in the central axis direction are different from each other. Thereby, since the adhesiveness of a tube and a male connector improves, the leakage of the liquid substance from a connection part can be reduced. In the present invention, the “position around the central axis” means a position in the rotational direction around the central axis.

  Preferably, the lock part has an annular shape surrounding the male connector. Thereby, since the strength of the lock parts is improved, a stable and higher connection strength can be obtained.

  The lockable position where the central axial direction position of the first abutting portion and the central axial direction position of the second abutting portion overlap, and the second abutting position with respect to the central axial direction position of the first abutting portion. It is preferable that the lock part is movable in the central axis direction with respect to the male connector between the position of the contact portion in the central axis direction and the retracted position located on the base end side. As a result, a sufficient insertion depth of the insertion portion can be secured even for a thick tube that cannot be sandwiched between the first contact portion and the second contact portion. Can be prevented. At this time, since there is no need to remove the lock part from the male connector, there is no possibility of losing the lock part.

  It is preferable that a movement restriction mechanism is provided that restricts movement of the lock part relative to the male connector in a central axis direction between the lockable position and the retracted position. Accordingly, when the lock part is rotated with respect to the male connector at the lockable position, the lock part can be prevented from being displaced to the retracted position, so that the connection work is facilitated. Also, when connecting a thick tube that cannot be clamped between the first contact portion and the second contact portion, the lock parts can be locked if the lock parts are moved to the retracted position in advance. Therefore, the insertion portion of the male connector can be surely inserted deeply into the tube.

  It is preferable that the tube into which the insertion portion of the male connector is inserted is sandwiched between the first contact portion and the second contact portion at the lockable position. Thereby, the firm connection of a male connector and a tube is realizable.

  Preferred embodiments of the present invention will be described below with reference to the drawings. However, it goes without saying that the present invention is not limited to the following embodiments.

  The connecting member of the present invention includes a substantially cylindrical male connector and a lock part that is penetrated by the male connector.

(Embodiment 1)
1 is a perspective view of a male connector 100 constituting a connecting member according to Embodiment 1 of the present invention, FIG. 2A is a front view thereof, FIG. 2B is a side view thereof viewed from the direction of arrow 2B in FIG. 2A, and FIG. It is arrow sectional drawing in the 2C-2C line | wire of 2A.

  The male connector 100 has a substantially hollow cylindrical shape as a whole in which a through hole 102 along the central axis 101 is formed. One end of the male connector 100 is, for example, an insertion portion 103 to be inserted into the upstream end (female connector) of the PEG tube, and the other end constitutes an enteral nutrition administration set connected to a container filled with a liquid material. A proximal end 104 connected to the downstream end of the tube. The liquid material flows in the through hole 102 from the base end portion 104 side toward the insertion portion 103 side.

  A part of the outer peripheral surface of the insertion portion 103 is formed with a bamboo shoot shape portion 105 in which a plurality of tapered surfaces (conical surfaces) having a large outer diameter on the base end portion 104 side are repeatedly arranged in the direction of the central axis 101. . However, the bamboo shoot shape part 105 is an example, Comprising: A well-known shape may be formed as an insertion part of a male connector other than this.

The distance from the central axis 101 in the cross section perpendicular to the central axis 101 is another part of the outer peripheral surface of the insertion part 103, preferably at a position closer to the base end part 104 than the bamboo shoot shape part 105. Two first abutting portions 130a and 130b are formed so as to increase as compared to FIG. As shown in FIG. 2C, the cross-sectional shape of the outer peripheral surface of the male connector 100 that passes through the first contact portions 130a and 130b and is perpendicular to the central axis 101 is substantially elliptical (or oval). Shape or track-like track). The two first contact portions 130a and 130b are disposed on the substantially elliptical long axis. Two first abutment portions 130a, apex distance between 130b (major axis of the substantially elliptical shape) is D _13.

A first collar 141 and a second collar 142 projecting outward are provided on the proximal end 104 side of the first contact parts 130a and 130b. The second collar 142 is located closer to the base end 104 than the first collar 141. The outer peripheral edge of the first flange ₁₄₁ is a circle having a diameter D ₁₄₁ that is larger than the distance D ₁₃ between the tops of the two first contact portions 130a, 130b. The outer peripheral edge of the second flange ₁₄₂ is a circle having a diameter D ₁₄₂ that is larger than the outer diameter D ₁₄₁ of the first flange 141.

A pair of locking projections 150 a and 150 b projecting outward is provided in a region between the first collar 141 and the second collar 142 and symmetrical with respect to the central axis 101. A pair of locking projections 150a, 150b top distance D ₁₅ of greater than the outer diameter D ₁₄₁ of the first flange portion 141.

  On the outer peripheral surface of the base end portion 104, a pair of plate-shaped grip plates 121a and 121b are provided upright along a plane including the central axis 101. The gripping plates 121a and 121b are gripped when holding the male connector 100 or applying torque for rotating the male connector 100 around the central axis 101 to the male connector 100. However, instead of the pair of gripping plates 121a and 121b, the outer peripheral surface of the base end portion 104 may be formed in various polygonal column surfaces, or an uneven pattern or the like may be provided on the outer peripheral surface.

  First contact portions 130a and 130b and locking projections 150a and 150b are provided on a virtual plane (not shown) including the grip plates 121a and 121b through the central axis 101. Accordingly, the user can insert the male connector 100 into the through hole 202 of the lock part 200 to be described later (see FIG. 5 to be described later) and the first contact portions 130a and 130b and the locking projections hidden by the lock part 200. The positions of 150a and 150b around the central axis 101 can be recognized from the positions of the gripping plates 121a and 121b.

  3 is a perspective view of the lock part 200 constituting the connecting member according to Embodiment 1 of the present invention, FIG. 4A is a front view thereof, FIG. 4B is a side view thereof viewed from the direction of arrow 4B in FIG. 4A, and FIG. 4A is a top view seen from the direction of arrow 4C of 4A, and FIG. 4D is a bottom view seen from the direction of arrow 4D of FIG. 4A.

  The lock part 200 includes a large diameter portion 203 and a small diameter portion 204 each having a substantially cylindrical shape. The large diameter portion 203 has a larger inner diameter and outer diameter than the small diameter portion 204. The large-diameter portion 203 and the small-diameter portion 204 are connected so that their central axes coincide with the central axis 201 of the lock part 200. The lock part 200 is formed with a through hole 202 along the central axis 201. However, the lock part of the present invention does not need to be divided into the large-diameter portion 203 and the small-diameter portion 204 as in the first embodiment, and has, for example, a substantially cylindrical shape having a single inner diameter and outer diameter. Also good.

As shown in FIG. 4D, a protrusion that swells so that the distance from the central axis 201 is reduced on the inner peripheral surface, which is a cylindrical surface, of the large-diameter portion 203 of the lock part 200. Two second contact portions 230a and 230b are formed. The second abutting portions 230a and 230b are arranged in the clockwise direction with respect to the top portions (portions closest to the central axis 201), and the inner peripheral surfaces of the large diameter portions 203 and the second abutting portions 230a and 230b. Inclined surfaces 239a and 239b that smoothly connect the (cylindrical surface). The second contact portions 230 a and 230 b including the inclined surfaces 239 a and 239 b are symmetric with respect to the central axis 210. The distance D ₂₃ between the top portions of the two second contact portions 230 a and 230 b is larger than the distance D ₁₃ between the top portions of the two first contact portions 130 a and 130 b of the male connector 100.

As shown in FIGS. 4C and 4D, a pair of arc-shaped locking ribs 241 a and 241 b projecting toward the central axis 201 are provided on the inner peripheral surface which is a cylindrical surface of the small diameter portion 204 in the circumferential direction. It is extended along. In the circumferential direction, regions where the locking ribs 241a and 241b are not formed are referred to as moving paths 242a and 242b. The locking ribs 241a and 241b and the movement paths 242a and 242b are symmetric with respect to the central axis 201. Engaging rib 241a, the inner diameter D ₂₄ of the small diameter portion 204 at 241b is substantially equal to the outer diameter D ₁₄₁ of the first flange portion 141 of the male connector 100, the locking projection 150a, from the top distance D ₁₅ of 150b Is smaller than the outer diameter D ₁₄₂ of the second flange 142. The inner diameter D ₂₅ of the small diameter portion 204 in the movement paths 242a and 242b is larger than the distance D ₁₅ between the top portions of the locking projections 150a and 150b.

  On the outer peripheral surface of the lock part 200, a pair of plate-shaped gripping plates 221a and 221b are erected along a surface including the central axis 201. The grip plates 221 a and 221 b are gripped when the lock part 200 is held or when torque for rotating the lock part 200 around the central axis 201 is applied to the lock part 200. However, instead of the pair of gripping plates 221a and 221b, the outer peripheral surface of the lock part 200 may be formed in various polygonal column surfaces, or an uneven pattern may be provided on the outer peripheral surface.

  The second contact portions 230a and 230b are provided on a virtual plane (not shown) including the grip plates 221a and 221b through the central axis 201. As a result, the user recognizes the positions around the central axis 201 of the second contact portions 230a and 230b that are difficult to see because they are formed on the inner peripheral surface of the large-diameter portion 203 from the positions of the grip plates 221a and 221b. can do. The moving paths 242a and 242b are not provided on the virtual plane.

  The male connector 100 and the lock part 200 can be manufactured by injection molding or the like using a hard resin material such as polypropylene, polycarbonate, polyethylene, ABS resin, polyvinyl chloride or the like.

As shown in FIG. 5, the lock part 200 is inserted through the male connector 100 by inserting the insertion portion 103 of the male connector 100 from the opening on the small diameter portion 204 side of the through hole 202. At this time, the male connector 100 is placed in the lock part 200 so that the locking ribs 241a and 241b of the lock part 200 are located closer to the base end part 104 than the first flange 141 of the male connector 100 (see FIG. 6A). Inserted. As described above, since the inner diameter D ₂₄ of the locking ribs 241a and 241b is substantially the same as the outer diameter D ₁₄₁ of the first flange 141, the locking ribs 241a and 241b can be inserted into the insertion portion by applying a slight force. It moves from the 103 side over the first flange 141 to the proximal end 104 side. Once the locking ribs 241a and 241b move to the base end portion 104 side with respect to the first flange 141, the lock part 200 does not fall out of the male connector 100 due to its own weight or slight vibration. This further reduces the possibility of the lock part 200 being lost.

In the first embodiment, in the lock part 200, the locking ribs 241 a and 241 b of the lock part 200 are positioned on the insertion portion 103 side with respect to the locking protrusions 150 a and 150 b of the male connector 100. It can move in the direction of the central axis 101, 201 between the “lockable position” (FIG. 6A) and the “retracted position” (FIG. 6B) located on the base end 104 side. As described above, the inner diameter D ₂₄ of the locking ribs 241 a and 241 b of the lock part 200 is smaller than the top distance D ₁₅ of the locking protrusions 150 a and 150 b of the male connector 100. Therefore, when the locking ribs 241a and 241b come into contact with the locking protrusions 150a and 150b, the lock part 200 cannot move between the lockable position and the retracted position. However, the locking ribs 241a and 241b of the lock part 200 are not continuous in the circumferential direction, but are divided by the moving paths 242a and 242b. The lock part 200 is rotated around the central axes 101 and 201 with respect to the male connector 100, and the lock protrusions 150 a and 150 b of the male connector 100 and the movement paths 242 a and 242 b of the lock part 200 are rotated about the central axes 101 and 201. When the positions in the rotational direction are matched, the locking protrusions 150a and 150b pass through the movement paths 242a and 242b, so that the lock part 200 can be freely moved between the lockable position (FIG. 6A) and the retracted position (FIG. 6B). Can be moved to. That is, the locking protrusions 150a and 150b of the male connector 100 and the locking ribs 241a and 241b of the lock part 200 are a position where the lock part 200 can be locked with respect to the male connector 100 in the direction of the central axes 101 and 201 and a retracted position. It functions as a movement restriction mechanism that restricts movement between the two.

  In the lockable position shown in FIG. 6A, the locking ribs 241a and 241b of the lock part 200 are positioned between the first flange 141 of the male connector 100 and the locking protrusions 150a and 150b in the direction of the central axes 101 and 201. doing. At this time, the positions of the first contact portions 130a and 130b of the male connector 100 in the direction of the central axes 101 and 201 overlap with the positions of the second contact portions 230a and 230b of the lock part 200 in the direction of the central axes 101 and 201.

  6B, the locking ribs 241a and 241b of the lock part 200 are positioned between the locking projections 150a and 150b of the male connector 100 and the second flange 142 in the direction of the central axes 101 and 201. ing. At this time, the second contact portions 230 a and 230 b of the lock part 200 are located closer to the proximal end portion 104 than the first flange portion 141 of the male connector 100 in the direction of the central axes 101 and 201.

  A method for connecting the connecting member 1 of Embodiment 1 and the upstream end (female connector) of the flexible hollow PEG tube 90 will be described below. Note that the male connector 100 and the lock part 200 can take a posture such that their central axes 101 and 201 do not coincide with each other, but in the drawing, the central axis of the male connector 100 and the lock part 200 are simplified for the sake of simplicity. The center axis 200 of FIG.

  In FIG. 5, the downstream end (not shown) of the PEG tube 90 is inserted into the stomach through a gastric fistula formed in the patient's abdomen. Reference numeral 80 denotes a flexible hollow tube provided on the downstream side of an enteral nutrition administration set for conveying a liquid substance to be administered to a patient. The downstream end of the tube 80 is inserted into the through hole 102 of the male connector 100 from the base end 104 side and integrated with the male connector 100 by a method such as fusion (see FIGS. 6A and 6B). The upstream end (not shown) of the enteral nutrition administration set is connected to a container filled with, for example, an enteral nutrient. There is no restriction | limiting in particular in the structure of an enteral-nutrition administration set, For example, any of the enteral-nutrition administration set prescribed | regulated by JIST3213 and other well-known enteral-nutrition administration sets may be sufficient. The enteral nutrition administration set may be provided with a pressurizing mechanism for pumping the liquid material flowing therethrough.

  The lock part 200 is in a lockable position (FIG. 6A) with respect to the male connector 100. From this state, the male connector 100 is inserted into the PEG tube 90.

  FIG. 7A is a front view showing a state where the insertion portion 103 of the male connector 100 of the connecting member 1 is inserted into the upstream end of the PEG tube 90, and FIG. 7B is a side view seen from the direction of arrow 7B in FIG. 7A. 8A is a cross-sectional view taken along line 8A-8A in FIG. 7B, FIG. 8B is a cross-sectional view taken along line 8B-8B in FIG. 7A, and FIG. 8C is a first abutting portion 130a of the male connector 100. It is arrow sectional drawing along the 8C-8C line | wire of FIG. 8A which passes along 130b. In FIG. 7A, FIG. 7B, FIG. 8A, and FIG. 8B, illustration of the tube 80 inserted in the base end part 104 is abbreviate | omitted in order to simplify drawing. 8A and 8C, the internal structure of the valve 95 communicating with a balloon (not shown) provided at the downstream end of the PEG tube 90 is not shown.

  As shown in FIG. 8A, the male connector 100 is inserted into the PEG tube 90 so that the first contact portions 130 a and 130 b provided in the insertion portion 103 of the male connector 100 are covered with the PEG tube 90. . At this time, as shown in FIG. 8B, the second contact portions 230 a and 230 b of the lock part 200 face the outer peripheral surface of the PEG tube 90. When the male connector 100 is inserted into the PEG tube 90, as shown in FIG. 8C, the second contact portions 230a and 230b of the lock part 200 do not face the first contact portions 130a and 130b of the male connector 100. Moreover, it is preferable that the rotation position around the central axes 101 and 201 with respect to the male connector 100 of the lock part 200 is maintained. Furthermore, it is preferable that the rotation position around the central axes 101 and 201 with respect to the male connector 100 of the lock part 200 is maintained so that the lock part 200 in the lockable position does not move to the retracted position.

  After the male connector 100 is inserted into the PEG tube 90 as described above, the lock part 200 is rotated about the central axes 101 and 201 with respect to the male connector 100 in the direction of the arrow 208 in FIG. 8C.

  FIG. 9A is a front view showing a state in which the lock part 200 is rotated in the direction of the arrow 208 with respect to the male connector 100, and FIG. 9B is a side view thereof as seen from the direction of the arrow 9B in FIG. 9A. 10A is a cross-sectional view taken along line 10A-10A in FIG. 9B, FIG. 10B is a cross-sectional view taken along line 10B-10B in FIG. 9A, and FIG. 10C is a first contact portion 130a of the male connector 100. FIG. 10B is a cross-sectional view taken along line 10C-10C of FIG. 10A passing through 130b. In FIG. 9A, FIG. 9B, FIG. 10A, and FIG. 10B, illustration of the tube 80 inserted in the base end part 104 is abbreviate | omitted in order to simplify drawing. 10A and 10C, the internal structure of the valve 95 communicating with a balloon (not shown) provided at the downstream end of the PEG tube 90 is not shown.

  As shown in FIGS. 10A and 10C, by rotating the lock part 200 with respect to the male connector 100, the second contact parts 230 a and 230 b of the lock part 200 and the first contact parts 130 a and 130 b of the male connector 100 are used. Are substantially opposed to each other in the radial direction, and the PEG tube 90 is compressed and sandwiched in the thickness direction by the second contact portions 230a and 230b and the first contact portions 130a and 130b.

  The frictional force between the second contact portions 230a and 230b and the PEG tube 90 generated by the compressive force applied to the PEG tube 90 by the second contact portions 230a and 230b causes the lock part 200 to act on the male connector 100. Thus, rotation in the direction of arrow 209 in FIG. 10C is prevented. Therefore, the holding state (locked state) of the PEG tube 90 by the first contact portions 130a and 130b and the second contact portions 230a and 230b shown in FIGS. 10A and 10C cannot be released by a slight external force or vibration.

  When the lock part 200 is rotated with respect to the male connector 100 in the direction of the arrow 208 in FIG. 8C, the locking protrusions 150a and 150b of the male connector 100 abut on the locking ribs 241a and 241b of the lock part 200, The lock part 200 is prevented from moving in the direction of the central axes 101 and 201 from the lockable position to the retracted position with respect to the male connector 100. Therefore, the lock part 200 is simply rotated with respect to the male connector 100 in the direction of the arrow 208 in FIG. 8C, that is, a force directed toward the PEG tube 90 along the central axes 101 and 201 is applied to the lock part 200. Even without this, the PEG tube 90 can be sandwiched between the second contact portions 230a and 230b and the first contact portions 130a and 130b. Therefore, regardless of the operator, the PEG tube 90 can always be stably held between the first contact portions 130a and 130b and the second contact portions 230a and 230b.

  In order to release the connection state between the PEG tube 90 and the connection member 1, an operation reverse to the above may be performed. That is, the lock part 200 is rotated in the direction of the arrow 209 in FIG. 10C with respect to the male connector 100, and the PEG tube 90 is held between the first contact portions 130a and 130b and the second contact portions 230a and 230b (locked). Status). Next, the male connector 100 is pulled out from the PEG tube 90.

  As described above, the connection member 1 according to the first embodiment is configured so that the first contact portions 130 a and 130 b of the male connector 100 and the second contact portions 230 a and 230 b of the lock part 200 are connected to the inner peripheral surface and the outer periphery of the PEG tube 90. Since the PEG tube 90 is sandwiched by being pressed against the surfaces, the connection member 1 and the PEG tube 90 can be firmly connected. Therefore, even when a liquid material is pumped to the patient through the PEG tube 90, or when an external force is unintentionally applied to the connection portion between the connection member 1 and the PEG tube 90, the connection is made from the PEG tube 90. The member 1 does not come off.

  Further, by simply rotating the lock part 200 with respect to the male connector 100, the PEG tube 90 can be pinched / unpinned by the first contact portions 130a and 130b and the second contact portions 230a and 230b. Therefore, the PEG tube 90 and the connection member 1 can be reconnected any number of times. Moreover, even if reconnection is repeated, the connection strength between the PEG tube 90 and the connection member 1 hardly changes.

  Moreover, since the connection member 1 of this Embodiment 1 is comprised only with two components, the male connector 100 and the lock part 200, there are few parts count, an assembly is easy, and it is low-cost. Moreover, since the lock part 200 is penetrated by the male connector 100, the possibility of losing the part is low.

In the first embodiment, as shown in FIG. 10C, the top portions of the second contact portions 230a and 230b of the lock part 200 and the top portions of the first contact portions 130a and 130b of the male connector 100 are substantially opposed in the radial direction. Until then, the lock part 200 was rotated relative to the male connector 100. However, the first contact portion 130a, a top distance D ₁₃ of the 130b and the second contact portion 230a, when the thickness of the PEG tube 90 is thick in such relative difference between the top distance D ₂₃ of the 230b, first The PEG tube 90 may be sandwiched between a location other than the top of the contact portions 130a and 130b and a location other than the top of the second contact portions 230a and 230b. If the first contact portion and / or the second contact portion is formed with an inclined surface (in the first embodiment, corresponding to the inclined surfaces 239a and 239b) that extends gently in the circumferential direction from this top portion, Since at least a part of the inclined surface can be pressed against the PEG tube 90, the range of dimensions of the PEG tube 90 that can provide a desired connection strength can be expanded.

  In the above connection method, if the thickness of the PEG tube 90 is too thick, the PEG tube 90 collides with the second abutting portions 230a and 230b of the lock part 200 as can be easily understood from FIG. Until the first contact portions 130 a and 130 b are covered with the PEG tube 90, the insertion portion 103 of the male connector 100 cannot be inserted deeply into the PEG tube 90. In this case, of course, the PEG tube 90 cannot be sandwiched between the first contact portions 130a and 130b and the second contact portions 230a and 230b as described above. In addition, since only a part of the distal end side of the insertion portion 103 of the male connector 100 can be inserted into the PEG tube 90, the male connector 100 is easily detached from the PEG tube 90.

  In the connection member 1 of the first embodiment, the male connector 100 is inserted into the thick PEG tube 90 in a state where the lock part 200 is moved to the retracted position (FIG. 6B).

  11A is a front view showing a state in which the lock part 200 is moved to the retracted position and the insertion portion 103 of the male connector 100 is inserted into the upstream end of the PEG tube 90, and FIG. 11B is seen from the direction of the arrow 11B in FIG. 11A. It is the side view. 12A is a cross-sectional view taken along line 12A-12A in FIG. 11B, and FIG. 12B is a cross-sectional view taken along line 12B-12B in FIG. 11A. In FIG. 11A, FIG. 11B, FIG. 12A, and FIG. 12B, illustration of the tube 80 inserted in the base end part 104 is abbreviate | omitted in order to simplify drawing. In FIG. 12A, the internal structure of the valve 95 communicating with a balloon (not shown) provided at the downstream end of the PEG tube 90 is not shown.

  As described with reference to FIG. 6B, when the lock part 200 is in the retracted position, the second contact portions 230 a and 230 b of the lock part 200 are more than the first flange 141 of the male connector 100 in the direction of the central axes 101 and 201. It is located on the base end 104 side. Therefore, the insertion portion 103 of the male connector 100 can be inserted deeply into the PEG tube 90 so that the first contact portions 130 a and 130 b of the male connector 100 are covered with the PEG tube 90. Of course, when the lock part 200 is in the retracted position, the PEG tube 90 cannot be sandwiched between the first contact portions 130a and 130b and the second contact portions 230a and 230b as described above. However, since all of the insertion portion 103 of the male connector 100 can be inserted into the PEG tube 90, a relatively high connection strength between the connection member 1 and the PEG tube 90 can be obtained. Moreover, since the lock part 200 does not need to be removed from the male connector 100 and is in a penetrated state, there is no possibility that the lock part 200 is lost.

  The above-described first embodiment is an example, and various modifications are possible.

  For example, in the first embodiment, the male connector 100 includes the two first contact portions 130a and 130b, and the lock part 200 includes the two second contact portions 230a and 230b. The number of first contact portions and the number of second contact portions included in the lock part 200 are not limited to two, and may be one or three or more. 13A, the male connector 100 includes three first contact portions 131a, 131b, and 131c on its outer peripheral surface, and the lock part 200 includes three second contact portions 231a, 231b, and 231c on its inner peripheral surface. An example is shown. 13B, the male connector 100 includes four first contact portions 132a, 132b, 132c, and 132d on the outer peripheral surface thereof, and the lock part 200 includes four second contact portions 232a, 232b, and 232c on the inner peripheral surface thereof. , 232d is shown. 13C, the male connector 100 includes four first contact portions 133a, 133b, 133c, and 133d on its outer peripheral surface, and the lock part 200 has four second contact portions 233a, 233b, and 233c on its inner peripheral surface. , 233d.

  The number of first contact portions and the number of second contact portions may be the same or different. However, it is preferable that one of the number of the first contact portions and the number of the second contact portions is a multiple of the other, and it is more preferable that both are the same number. In particular, two or more first contact portions are arranged at equal angular intervals with respect to the central axis 101 in the male connector 100, and the same number of second contact portions as the first contact portions of the male connector 100 are provided in the lock part 200. Are preferably arranged at equiangular intervals with respect to the central axis 201. Thereby, when the lock part 200 is rotated and the PEG tube is sandwiched between the first contact part and the second contact part, the positions of the center axis 101 of the male connector 100 and the center axis 201 of the lock part 200 are Since almost no deviation occurs, the PEG tube can be clamped in a balanced manner, and a stable and high connection strength can always be obtained.

  In the case where the number of the first contact portions provided in the male connector 100 and the number of the second contact portions provided in the lock part 200 are both two, in Embodiment 1 described above, the first outer peripheral surface of the male connector 100 is provided. Although the cross-sectional shape passing through the contact portions 130a and 130b was substantially elliptical (FIG. 8C), the cross-sectional shape passing through the second contact portions 234a and 234b on the inner peripheral surface of the lock part 200 was substantially elliptical as shown in FIG. 13D. (Or an oval shape or a track shape for athletics). In FIG. 13D, 134 a and 134 b indicate two first contact portions formed on the outer peripheral surface of the male connector 100. Alternatively, as shown in FIG. 13E, both the cross-sectional shape passing through the first contact portions 135a and 135b on the outer peripheral surface of the male connector 100 and the cross-sectional shape passing through the second contact portions 235a and 235b on the inner peripheral surface of the lock part 200 are provided. , May be substantially oval (or oval or track-like track).

  In the present invention, the first abutting portion provided on the outer peripheral surface of the insertion portion 103 of the male connector 100 is relatively longer in distance from the central axis 101 than in other portions in a cross section perpendicular to the central axis 101. The cross-sectional shape of the first contact portion along the plane perpendicular to the central axis 101 is not particularly limited. In addition, the second contact portion provided on the inner peripheral surface of the lock part 200 only needs to have a relatively smaller distance from the central axis 201 than the other portions in a cross section perpendicular to the central axis 201. The cross-sectional shape of the second contact portion along the plane perpendicular to the central axis 201 is not particularly limited. For example, the first contact portion and / or the second contact portion may be a protrusion whose cross-sectional shape is a substantially arc shape, a substantially triangular shape, a substantially trapezoidal shape, or the like. The male connector 100 shown in FIGS. 13B, 13C, and 13D includes a first contact portion that is a protrusion whose cross-sectional shape is raised in a substantially arc shape. Each of the lock parts 200 in FIGS. 13A and 13B includes a second contact portion that is a protrusion whose cross-sectional shape is raised in a substantially arc shape. Alternatively, the cross-sectional shape of the outer peripheral surface of the male connector 100 and / or the cross-sectional shape of the inner peripheral surface of the lock part 200 may be approximately elliptical, approximately oval, or approximately polygonal (approximately triangular, approximately square, etc.) One contact portion or a second contact portion can also be formed. The outer peripheral surface of the male connector 100 of FIG. 8C and FIG. 13E has a substantially elliptical cross-sectional shape, and includes two first contact portions on the major axis. The outer peripheral surface of the male connector 100 of FIG. 13A has a substantially equilateral triangular cross-sectional shape, and its three apexes function as first contact portions. The inner peripheral surface of the lock part 200 in FIG. 13C has a substantially square cross-sectional shape, and the central part of the four sides and the vicinity thereof function as the second contact part. The inner peripheral surface of the lock part 200 in FIGS. 13D and 13E has a substantially elliptical cross-sectional shape, and two portions on the short axis and the vicinity thereof function as a second contact portion. As can be understood from the above, the first contact portion and the second contact portion of the present invention center the outer peripheral surface of the male connector 100 and the inner peripheral surface of the lock part 200 in a cross section perpendicular to the central axis. It can be formed by making it non-circular in which the distance from the axis is not constant in the circumferential direction. In particular, in the lock part 200, it should be noted that the second contact portion can also be formed on a flat surface (see FIG. 13C) or a concave surface (FIGS. 13D and 13E). That is, with respect to the male connector, the male connector can be changed so that the gap between the outer peripheral surface of the male connector and the inner peripheral surface of the lock part is changed by rotating the lock part penetrating the male connector around the central axis. The outer peripheral surface and the inner peripheral surface of the lock part opposite to the outer peripheral surface may be formed.

  In the present invention, the first contact portion and the second contact portion are the portions on the outer peripheral surface of the male connector that hold the PEG tube by contacting the inner peripheral surface and the outer peripheral surface of the PEG tube between them and the lock. The part on the inner peripheral surface of the part. For example, if the thickness of the PEG tube changes, the portion on the outer peripheral surface of the male connector that holds the PEG tube and the portion on the inner peripheral surface of the lock part may slightly change. Therefore, the first contact portion and the second contact portion of the present invention should be understood as not having a point but a region having a certain area.

  In the cross section perpendicular to the central axis 201 passing through the second contact portion of the lock part 200, the cross-sectional shape of the outer peripheral surface of the lock part 200 can be arbitrarily set regardless of the cross-sectional shape of the inner peripheral surface. . For example, in FIGS. 13C, 13D, and 13E, the cross-sectional shape of the outer peripheral surface of the lock part 200 may be substantially circular.

  In the first embodiment, the lock part has an annular shape surrounding the male connector. However, the present invention is not limited to this, and for example, approximately C in which slits connecting both ends in the central axis direction are formed. It may have a letter shape. However, since the PEG tube can be held with a large force when the ring shape is as in the first embodiment, a stable and high connection strength can be obtained.

  In the first embodiment, the lock part 200 can be moved in the direction of the central axes 101 and 201 between the lockable position and the retracted position. However, the lock part 200 may be configured to be unable to move to the retracted position.

  The number of locking protrusions provided on the male connector 100 and the number of movement paths of the lock part 200 through which the male connector 100 passes are not limited to two as in the first embodiment. Set the number of locking projections and the number of movement paths so that the number of first contact portions provided on the male connector 100 and / or the number of second contact portions provided on the lock part 200 are the same. Also good.

  The 1st collar part 141 and / or the 2nd collar part 142 provided in the male connector 100 do not need to be continuing in the circumferential direction. In addition, the first flange 141 and / or the second flange 142 can be omitted.

(Embodiment 2)
Below, the connection member 2 which concerns on Embodiment 2 of this invention is demonstrated. In the figure shown below, the same code | symbol is attached | subjected to the same component as the component of the connection member 1 which concerns on Embodiment 1, and detailed description about them is abbreviate | omitted. The connection member 2 according to the second embodiment will be described with a focus on differences from the connection member 1 according to the first embodiment.

  14 is a perspective view of a male connector 300 constituting a connection member according to Embodiment 2 of the present invention, FIG. 15A is a front view thereof, FIG. 15B is a side view thereof viewed from the direction of arrow 15B in FIG. 15A, and FIG. 15A is a cross-sectional view taken along line 15C-15C, and FIG. 15D is a cross-sectional view taken along line 15D-15D in FIG. 15A. For convenience of explanation, in the direction of the central axis 101 of the male connector 300, the base end portion 104 side is referred to as “upper side” and the insertion portion 103 side is referred to as “lower side”.

  The male connector 300 according to the second embodiment has two first upper contact portions as first contact portions on the outer peripheral surface of the insertion portion 103, preferably at a position closer to the base end portion 104 side than the bamboo shoot shape portion 105. Portions 331a and 331b and two first lower contact portions 332a and 332b are formed. The first upper contact portions 331a and 331b and the first lower contact portions 332a and 332b are central axes in a cross section perpendicular to the central axis 101, like the first contact portions 130a and 130b of the first embodiment. It swells so that the distance from 101 increases compared with other parts. In the direction of the central axis 101, the first upper contact portions 331a and 331b are provided closer to the base end portion 104 (upper side) than the first lower contact portions 332a and 332b.

As shown in FIG. 15C, the cross-sectional shape of the outer peripheral surface of the male connector 100 that passes through the first upper contact portions 331a and 331b and is perpendicular to the central axis 101 is substantially elliptical (or long). Circular or track-like track). The first upper contact portions 331a and 331b are arranged on the long axis of the substantially elliptical shape. The distance between the tops of the two first upper contact portions 331a, 331b (the major axis of the substantially elliptical shape) is _D331 .

As shown in FIG. 15D, the cross-sectional shape of the outer peripheral surface of the male connector 100 along the plane that passes through the first lower contact portions 332a and 332b and is perpendicular to the central axis 101 is substantially elliptical (or Oval or track-like track). The first lower contact portions 332a and 332b are disposed on the substantially elliptical long axis. The distance between the tops of the two first lower contact portions 332a, 332b (the major axis of the substantially elliptical shape) is _D332 . The substantially elliptical minor axis D ₃₃₃ passing through the first lower contact portions 332a and 332b is substantially the same as the distance D ₃₃₁ between the top portions of the first upper contact portions 331a and 331b.

  When viewed along the central axis 101, the first upper abutting portions 331a and 331b and the first lower abutting portions 332a and 332b have different positions around the central axis 101. Specifically, when viewed along the central axis 101, a straight line connecting the first upper contact portion 331a and the first upper contact portion 331b, the first lower contact portion 332a, and the first lower contact It is orthogonal to the straight line connecting the contact portion 332b.

A first flange 141 projecting outward is provided on the proximal end 104 side of the first upper contact portions 331a and 331b. The diameter D 141 of the outer peripheral edge of the first flange ₁₄₁ is larger than the distance D ₃₃₁ between the tops of the first upper contact parts 331a and 331b and the distance D ₃₃₂ between the tops of the first lower contact parts 332a and 332b. .

  16 is a perspective view of a lock part 400 constituting a connection member according to Embodiment 2 of the present invention, FIG. 17A is a front view thereof, FIG. 17B is a side view thereof viewed from the direction of arrow 17B in FIG. 17A, and FIG. 17A is a top view thereof viewed from the direction of arrow 17C of 17A, and FIG. 17D is a bottom view thereof viewed from the direction of arrow 17D of FIG. 17A.

  The lock part 400 includes a small diameter portion 204, a medium diameter portion 401, and a large diameter portion 402 in this order along the central axis 201 thereof. For convenience of explanation, in the direction of the central axis 201 of the lock part 400, the small diameter portion 204 side is referred to as “upper side” and the large diameter portion 402 side is referred to as “lower side”.

  18A is a cross-sectional view taken along line 18A-18A in FIG. 17A passing through the middle diameter portion 401, and FIG. 18B is a cross-sectional view taken along line 18B-18B in FIG.

As shown in FIG. 18A, the cross-sectional shape of the inner peripheral surface of the middle diameter portion 401 that passes through the middle diameter portion 401 and is perpendicular to the central axis 201 is substantially elliptical (or oval or Track and track). Two second upper abutting portions 431a and 431b whose distance from the central axis 201 is reduced compared to other portions are formed on the substantially elliptical short axis. The distance between the tops of the second upper contact parts 431a and 431b (the substantially elliptical minor axis) D ₄₃₁ is larger than the distance D ₃₃₁ between the top parts of the first upper contact parts 331a and 331b of the male connector 300.

As shown in FIG. 18B, the cross-sectional shape of the inner peripheral surface of the large-diameter portion 402 passing through the large-diameter portion 402 and along a plane perpendicular to the central axis 201 is substantially elliptical (or oval-shaped or Track and track). Two second lower abutting portions 432a and 432b whose distance from the central axis 201 is reduced as compared with other portions are formed on the substantially elliptical short axis. The second lower-side contact part 432a, D ₄₃₂ (minor diameter of the substantially elliptical shape) top distance between 432b, the first lower-side contact part 332a of the male connector 300, larger than the top portion distance D ₃₃₂ of 332b . The distance D ₄₃₂ is substantially the same as the major axis direction diameter D ₄₃₃ of the inner peripheral surface of the medium diameter portion 401.

  As described above, the lock part 400 includes the second upper abutting portions 431a and 431b and the second lower abutting portions 432a and 432b having different positions in the central axis 201 direction as the second abutting portions.

  Similarly to the first embodiment, the lock part 400 is inserted through the male connector 300 by inserting the insertion portion 103 of the male connector 300 from the opening on the small diameter portion 204 side of the through hole 202. Similarly to the first embodiment, the lock part 400 can move in the direction of the central axes 101 and 201 between the “lockable position” and the “retracted position” with respect to the male connector 300. At the lockable position, the positions of the first upper contact portions 331a and 331b of the male connector 300 in the direction of the central axes 101 and 201 and the positions of the second upper contact portions 431a and 431b of the lock part 400 in the direction of the central axes 101 and 201 are determined. Overlapping and central shaft 101, 201 direction position of the first lower contact portion 332a, 332b of the male connector 300 and central shaft 101, 201 direction position of the second lower contact portion 432a, 432b of the lock part 400 And overlap.

  A method for connecting the connection member 2 of the second embodiment and the upstream end (female connector) of the flexible hollow PEG tube 90 will be described below.

  The male connector 300 is inserted into the PEG tube 90 in a state where the lock part 400 is disposed at a lockable position with respect to the male connector 300.

  19 is a perspective view showing a state in which the insertion portion 103 of the male connector 300 of the connecting member 2 is inserted into the upstream end of the PEG tube 90, FIG. 20A is a front view thereof, and FIG. 20B is a view from the direction of the arrow 20B in FIG. FIG. 21A is a cross-sectional view taken along line 21A-21A in FIG. 20B, FIG. 21B is a cross-sectional view taken along line 21B-21B in FIG. 20A, and FIG. 21C is an arrow taken along line 8C-8C in FIG. FIG. 22A is a cross-sectional view taken along line 22A-22A in FIG. 20A, and FIG. 22B is a cross-sectional view taken along line 22B-22B in FIG. 20A. In these drawings, the tube 80 (see FIGS. 5, 6A, and 6B) inserted into the base end portion 104 is omitted for the sake of simplicity. 21A and 22A, the internal structure of the valve 95 communicating with a balloon (not shown) provided at the downstream end of the PEG tube 90 is not shown.

  As shown in FIG. 21A, the male connector 100 is inserted into the PEG tube 90 so that the first upper contact portions 331a and 331b provided in the insertion portion 103 of the male connector 300 are covered with the PEG tube 90. To do. At this time, as shown in FIGS. 22A and 22B, the second upper contact portions 431 a and 431 b and the second lower contact portions 432 a and 432 b of the lock part 400 face the outer peripheral surface of the PEG tube 90. When the male connector 300 is inserted into the PEG tube 90, the second upper contact portions 431a and 431b of the lock part 400 face the first upper contact portions 331a and 331b of the male connector 300 as shown in FIG. 22A. 22B, and the second lower contact portions 432a and 432b of the lock part 400 do not face the first lower contact portions 332a and 332b of the male connector 300, as shown in FIG. It is preferable that the rotational positions around the central axes 101 and 201 with respect to the connector 300 are maintained.

  After the male connector 300 is inserted into the PEG tube 90 as described above, the lock part 400 is rotated around the central axes 101 and 201 with respect to the male connector 300 in the direction of the arrow 208 in FIGS. 22A and 22B.

  23 is a perspective view showing a state in which the lock part 400 is rotated in the direction of the arrow 208 with respect to the male connector 300, FIG. 24A is a front view thereof, and FIG. 24B is a side view thereof seen from the direction of the arrow 24B in FIG. It is. 25A is a cross-sectional view taken along line 25A-25A in FIG. 24B, FIG. 25B is a cross-sectional view taken along line 25B-25B in FIG. 24A, and FIG. 26A is an arrow taken along line 26A-26A in FIG. FIG. 26B is a sectional view taken along the line 26B-26B in FIG. 24A. In these drawings, the tube 80 (see FIGS. 5, 6A, and 6B) inserted into the base end portion 104 is omitted for the sake of simplicity. In FIG. 25A and FIG. 26A, the internal structure of the valve 95 communicating with a balloon (not shown) provided at the downstream end of the PEG tube 90 is omitted.

  As shown in FIGS. 25A and 26A, by rotating the lock part 400 with respect to the male connector 300, the second upper contact parts 431a and 431b of the lock part 400 and the first upper contact part 331a of the male connector 300 are obtained. , 331b substantially oppose each other in the radial direction, and the PEG tube 90 is compressed and sandwiched in the thickness direction by the second upper contact portions 431a, 431b and the first upper contact portions 331a, 331b.

  Furthermore, as shown in FIG. 25B and FIG. 26B, by rotating the lock part 400 with respect to the male connector 300, the second lower contact portions 432a, 432b of the lock part 400 and the first lower side of the male connector 300 The contact portions 332a and 332b are substantially opposed to each other in the radial direction, and the PEG tube 90 is compressed and sandwiched in the thickness direction by the second lower contact portions 432a and 432b and the first lower contact portions 332a and 332b. The

  Second upper abutment portions 431a, 431b and second lower abutment portions 431a, 431b and second lower abutment portions 432a, 432b are generated by a compressive force applied to the PEG tube 90. The frictional force between 432 a and 432 b and the PEG tube 90 prevents the lock part 400 from rotating in the direction of the arrow 209 in FIGS. 26A and 26B with respect to the male connector 300. Therefore, the pinched state (locked state) of the PEG tube 90 by the male connector 300 and the lock part 400 shown in FIGS. 25A, 25B, 26A, and 26B cannot be released by a slight external force or vibration.

  To release the connection state between the PEG tube 90 and the connection member 2, an operation reverse to the above may be performed. That is, the lock part 400 is rotated with respect to the male connector 300 in the direction of the arrow 209 in FIGS. 26A and 26B to release the pinched state (locked state) of the PEG tube 90 between the male connector 300 and the lock part 400. Next, the male connector 300 is pulled out from the PEG tube 90.

  As described above, the connection member 2 of the second embodiment holds the PEG tube 90 by pressing the male connector 300 and the lock part 400 to the inner peripheral surface and the outer peripheral surface of the PEG tube 90, respectively. Moreover, at positions different in the directions of the central axes 101 and 201, that is, an upper clamping position by the first upper contact portions 331a and 331b and the second upper contact portions 431a and 431b, and the first lower contact portions 332a, The PEG tube 90 is clamped at the lower clamping position between the 332b and the second lower abutting portions 432a and 432b. Therefore, the connection member 2 and the PEG tube 90 can be more firmly connected in the second embodiment than in the first embodiment in which the clamping position in the direction of the central axes 101 and 201 is one. Therefore, even when a liquid substance is pumped to the patient through the PEG tube 90, or when an external force is unintentionally applied to the connection portion between the connection member 2 and the PEG tube 90, the connection is made from the PEG tube 90. The member 2 does not come off.

  Further, when viewed along the central axes 101 and 201, the upper holding position where the first upper contact parts 331a and 331b and the second upper contact parts 431a and 431b shown in FIG. 26A hold the PEG tube 90. The upper holding position where the first lower contact parts 332a and 332b and the second lower contact parts 432a and 432b shown in FIG. 26B hold the PEG tube 90 is around the central axes 101 and 201. The position is about 90 degrees different. That is, when viewed along the central axes 101 and 201, the connecting member 1 of the first embodiment clamps the PEG tube 90 at two locations around the central axes 101 and 201, whereas the connecting member of the second embodiment. 2 sandwiches the PEG tube 90 at four locations around the central axes 101 and 201. Therefore, as is clear from the comparison between FIG. 8C and FIG. 26B, the male connector 300 and the PEG tube 90 are more closely attached in the second embodiment, so even if pressure is applied to the liquid, The possibility that the liquid material leaks from the connection portion between the PEG tube 90 and the connection member 2 is low.

In particular, as in the second embodiment, the distance D ₃₃₁ between the top portions of the first upper contact portions 331a and 331b (see FIG. 15C) is a substantially elliptical short diameter passing through the first lower contact portions 332a and 332b. If it is the same as D ₃₃₃ (see FIG. 15D), as shown in FIG. 26B, the male connector 300 is located at the position in the direction of the central axes 101, 201 where the first lower contact portions 332a, 332b are formed. Since the PEG tube 90 and the PEG tube 90 are easily in close contact with each other, liquid leakage is further reduced.

  In the second embodiment, each of the first contact portion and the second contact portion is installed at two places where the positions in the central axes 101 and 201 directions are different, but three places where the positions in the central axes 101 and 201 directions are different. You may install in the above.

  The second embodiment is the same as the first embodiment except for the above, and has the same effect as described in the first embodiment. Also in the second embodiment, as described in the first embodiment, the male connector 300 can be inserted into the thick PEG tube 90 with the lock part 300 moved to the retracted position. Furthermore, various changes described in the first embodiment can be applied to the second embodiment.

  In the first and second embodiments, the example in which the connecting member of the present invention is provided at the downstream end of the tube constituting the enteral nutrition administration set is shown, but the present invention is not limited to this. For example, at the downstream end of a flexible hollow tube that constitutes an enteral feeding extension tube used in connection with an enteral feeding set and an enteral feeding catheter to extend the line It can also be provided. There is no restriction | limiting in particular in the structure of an enteral-nutrition extension tube, For example, any of the enteral-nutrition extension tube prescribed | regulated by JIST3264 and other well-known enteral-nutrition extension tubes may be sufficient. As with the first and second embodiments, the connection member and the enteral nutrition extension tube are connected by connecting the downstream end of the tube constituting the enteral nutrition extension tube to the through hole 102 of the male connector 100 at the base end. It can be performed by inserting from the 104 side and integrating with the male connector 100 by a method such as fusion (see FIGS. 6A and 6B). Furthermore, the connection member of the present invention can be attached to one end of a hollow tube other than the enteral nutrition administration set or enteral nutrition extension tube.

  In the first and second embodiments, the case where the connection member of the present invention is connected to the PEG tube has been described as an example. However, the connection member of the present invention is an enteral nutrition such as a nasal tube or a PTEG tube other than the PEG tube. It can be applied to various tubes (enteral feeding catheters) used for therapy, medical tubes used other than enteral feeding therapy, and tubes used for purposes other than medical use.

  Each of the embodiments described above is intended to clarify the technical contents of the present invention, and the present invention is not construed as being limited to such specific examples. The present invention should be construed broadly, with various modifications within the spirit and scope of the appended claims.

  The field of application of the present invention is not particularly limited, and can be widely used in various fields such as medicine, food, and chemistry where a hollow tube needs to be connected.

1, 2 Connecting member 80 Nutritional set tube 90 PEG tube 100, 300 Male connector 101 Male connector central axis 102 Through hole 103 Insertion portion 104 Base end portion 105 Bamboo-pitch-shaped portion 121a, 121b Grip plate 130a, 130b First contact Part 331a, 331b first upper contact part (first contact part)
332a, 332b first lower contact portion (first contact portion)
141 First collar 142 Second collar 150a, 150b Locking protrusion 200, 400 Lock part 201 Center axis 203 of lock part Large diameter part 204 Small diameter part 202 Through hole 221a, 221b Grip plate 230a, 230b Second contact part 431a, 431b Second upper contact portion (second contact portion)
432a, 432b Second lower contact portion (second contact portion)
239a, 239b Inclined surfaces 241a, 241b Locking ribs 242a, 242b

Claims (13)

A connecting member connectable to a tube used for enteral nutrition therapy, comprising a substantially cylindrical male connector having an insertion portion inserted into the tube at one end and a base end portion at the other end, and the male connector With lock parts penetrated by,
The male connector includes at least one first abutting portion having a relatively increased distance from the central axis in a cross section perpendicular to the central axis on a part of the outer peripheral surface of the insertion portion,
The lock part includes, on its inner peripheral surface facing the male connector, at least one second contact portion whose distance from the central axis is relatively reduced in a cross section perpendicular to the central axis ,
One of the first contact portion and the second contact portion is a protrusion, and the outer peripheral surface of the male connector on which the other is formed, along the surface passing through the other and perpendicular to the central axis. Alternatively , the connecting member is characterized in that a cross-sectional shape of an inner peripheral surface of the lock part is substantially elliptical .   2. The connection member according to claim 1, wherein a cross-sectional shape of an outer peripheral surface of the male connector passing through the first contact portion and along a plane perpendicular to the central axis is substantially elliptical.   3. The connection member according to claim 1, wherein a cross-sectional shape of an inner peripheral surface of the lock part along a plane that passes through the second contact portion and is perpendicular to the central axis is substantially elliptical.   The connection member according to claim 1, wherein a plurality of the first contact portions are arranged at equiangular intervals with respect to the central axis. 5. The connection member according to claim 4 , comprising the same number of the second abutting parts as the first abutting parts, and a plurality of the second abutting parts are arranged at equiangular intervals with respect to the central axis.   In the male connector, the first contact portion is provided at two or more positions different in the central axis direction, and in the lock part, the second contact portion is positioned in the central axis direction. The connection member according to claim 1, which is provided at two or more different places. When viewed along the central axis, the positions around the central axis of the first contact portions provided at two or more different positions in the central axis direction are different from each other, and when viewed along the central axis, The connection member according to claim 6 , wherein the positions around the central axis of the second contact portions provided at two or more different positions in the central axis direction are different from each other.   The connecting member according to claim 1, wherein the lock part has an annular shape surrounding the male connector.   The lockable position where the central axial direction position of the first abutting portion and the central axial direction position of the second abutting portion overlap, and the second abutting position with respect to the central axial direction position of the first abutting portion. The connection member according to claim 1, wherein the lock part is movable in a central axis direction with respect to the male connector between a position in a central axis direction of a contact portion and a retracted position located on the base end side. The connection member according to claim 9 , further comprising a movement restriction mechanism that restricts movement of the lock part in a central axis direction with respect to the male connector between the lockable position and the retracted position. The connection member according to claim 9 , wherein the tube into which the insertion portion of the male connector is inserted is sandwiched between the first contact portion and the second contact portion at the lockable position. Enteral nutrition administration set having at one end a connecting member according to any of claims 1 to 11. Enteral nutrition extension tube to the connecting member provided at one end of any one of claims 1 to 11.

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