JP6019608B2 - Medical tube fixture - Google Patents

Description

  The present invention relates to a medical tube fixture for fixing a medical tube such as a catheter, an infusion solution, or a dialysis circuit to a fixing portion of a body, a drip stand, a bed, a medical device, or the like.

  As a means to fix the external body of a medical tube such as a catheter introduced into the body to a fixing part such as skin or medical equipment, the tube and the fixing part are fixed by tying with a suture thread, or attached to the tube. However, there are problems in that the fixing force to the tube is small, the operation is complicated, the tube may be damaged, and the position of the tube after fixing is adjusted. In order to solve these problems, for example, the catheter fixtures of Patent Documents 1 and 2 are used.

  Patent Document 1 discloses a C-shaped configuration in which an airfoil portion is extended on both sides from a bottom portion of a holder portion into which a catheter is inserted, a slit is formed in an axial direction on the bottom portion of the holder portion, and is fitted around the holder portion. A metal clip for holding the catheter by pressing the holder portion with a spring member is provided.

  In Patent Document 2, an airfoil portion is extended on both sides from the bottom portion of the tubular portion into which the catheter is inserted, a slit is formed in the axial direction on the upper portion of the tubular portion, and an opening portion is formed in the longitudinal direction. A cover portion having a lumen portion that is externally fitted to the cylindrical portion is provided.

Japanese Patent No. 3747330 Japanese Patent Laid-Open No. 2003-154012

  However, in Patent Document 1, since a metal clip is used, there is a problem that it is necessary to remove the metal clip at the time of X-ray, MRI, or CT inspection that is widely used in medical examinations.

  Further, in Patent Document 2, since the catheter is gripped by the cover portion via the cylindrical portion, the catheter cannot be sufficiently fixed, and when the catheter is moved after fixation, the cover portion is not easy to remove. There was a problem.

  The present invention solves the above-described problems, and provides a medical tube fixture that does not require removal during a medical examination, provides a sufficient fixing force to the tube, and allows easy clip removal when adjusting the position of the tube. With the goal.

The invention of claim 1 comprises a holding member that holds the tube, and a resin clip that can hold the tube via the holding member,
The holding member is formed of a resin having a hardness lower than that of the clip, and the holding member has a holder portion having a lumen into which a tube is fitted, and an airfoil portion extending from the bottom portion of the holder portion to both sides, respectively. The bottom of the holder portion is provided with a slit formed in the axial direction of the lumen and communicating with the lumen;
A fitting that can fix the tube by gripping the neck part between the holder part and the airfoil part by the pressurization part that is formed in a C-shaped cross section and surrounds the holder part and formed at the open end. A combined wing, an arm part extending laterally from the pressurizing part, and an expansion blade supported by the arm part so as to be swingable in a vertical direction within a predetermined range and capable of opening the pressurizing part via the arm part And
Forming a pressure receiving groove in the neck portion in the axial direction of the lumen;
A protrusion that bites into the pressure receiving groove protrudes from the pressurizing portion.

The invention according to claim 2 is the configuration according to claim 1,
Protrusions are formed at an acute angle shape having a lumen axial direction perpendicular to the top side, in which are arranged at predetermined intervals in the plurality the inner腔軸center direction.

The invention according to claim 3 is the structure according to claim 1,
Projections, at an acute angle with the top edge along the inner lumen axially to the distal end portion, is made of a plurality which are arranged at a predetermined interval in one or lumen axial direction.

The invention according to claim 4 is the configuration according to any one of claims 1 to 3,
The spreading wing is rotatable on the arm part between a lower inclination limit that abuts on the airfoil part and an upper inclination limit that is lifted upward via a pin parallel to the lumen axis. It is attached.

The invention according to claim 5 is the configuration according to any one of claims 1 to 4,
  The expansion wing is formed with a connection hole that is connected to at least the holding member via a connection cable.

The invention according to claim 6 is the configuration according to any one of claims 1 to 5,
  The ratio of the length of the expanding blade extending outward from the arm portion to the arm length of the arm portion formed on the outer side of the pressurizing portion is set to 1.0 or more and 2.2 or less. Is.

According to the first aspect of the present invention, since it is constituted by the resin-made holding member and the resin-made clip, it is not necessary to remove at the time of X-ray, MRI, or CT inspection. Moreover, since the protrusion which bites into the neck part of the holding member is provided in the pressurizing part of the fitting body that surrounds the holder part of the holding member, the pressing force of the fitting body is effectively applied from the pressing part to the holder part using the protrusion. The tube can be securely fixed by increasing the friction force between the lumen of the holding member and the tube, and sufficient grip force can be obtained for patient movement and peeling of the fixing tape. And the clip can be prevented from coming off from the holding member. In addition, the clip can be easily detached from the holding member by pinching the expanding blades provided on both sides of the pressing unit with fingers to expand the pressing unit. It can be easily moved.
Further, since the pressure receiving groove into which the protrusion is fitted is formed in the neck portion, the grip force of the clip with respect to the holding member can be increased, and the clip can be prevented from being detached due to body movement or contact.

  According to the second and third aspects of the present invention, since the plurality of protrusions having apexes are arranged at predetermined intervals in the pressurizing portion, the applied pressure is concentrated around the apex of each protrusion. Thus, the frictional force between the lumen of the holding member and the tube can be effectively increased, and the tube can be reliably gripped and fixed.

According to the fourth aspect of the present invention , the right and left spreading blades are pinched with fingers at the upper inclination limit to open the pressing portion, and the clip is detached from the holding member. In addition, the spreader blade is closely attached to the airfoil of the holding member at the lower inclination limit to reduce the gap, reduce the risk of infection, and reduce the volume of the tube fixing tool. A protective tape can be affixed on a tool and used compactly.

According to the fifth aspect of the present invention, the clip and the holding member can be connected by the connecting rope using the connecting hole formed in the spreading blade, and the clip is dropped when the clip is separated from the holding member. Can be prevented from being lost.

According to the sixth aspect of the present invention, the length of the expanding blade with respect to the arm length of the arm portion is set to 1.0 or more and 2.2 or less, so that the operability is good and it is accidentally detached without being bulky. Therefore, it is possible to provide a medical tube fixture that is excellent in wearability and can be prevented from being damaged.

It is a bottom side perspective view of a clip, showing an embodiment of a medical tube fixture according to the present invention. It is a disassembled perspective view of a medical tube fixing tool. It is a perspective view which shows the attachment state of a medical tube fixing tool. It is a whole top view which shows the attachment state of a medical tube fixing tool. It is a fragmentary sectional view of the front view which shows the decomposition | disassembly state of a medical tube fixing tool. It is a top view of a clip. It is a bottom view of a clip. It is sectional drawing of the front view which shows the mounting state of a medical tube fixing tool. (A)-(c) is a perspective view which shows the kind of protrusion, (a) is a thing of this Example, (b) is a modification, (c) shows another Example. (A) And (b) shows the other Examples 1 and 2 which have the other structure which increases the grip force of the clip with respect to a holding member, (a) is the front view of the decomposition | disassembly state which shows the other Example 1, (B) is the front view of the decomposition | disassembly state which shows other Example 2. FIG. It is a perspective view of the metal clip used for experiment. (A) And (b) shows the other Example of a holding member, (a) is a side view, (b) is a perspective view. (A)-(c) shows the other Example of a clip, (a) is a top view, (b) is a bottom view, (c) is AA sectional drawing shown to (a). (A) And (b) is a perspective view which shows the use state of the holding member and clip of another Example, (a) is before clip mounting | wearing, (b) shows after clip mounting | wearing.

[Example 1]
Embodiments of the present invention will be described below with reference to the drawings.
1 to 4 show an example of a catheter in which a tube fixture 10 according to the present invention is used. A catheter body (tube) 1 is inserted into a body within a certain range from a distal end portion. Reference numeral 10 denotes a holding member 11 that is externally fitted to the outside of the body of the catheter body 1 and a clip 21 that is detachably attached to the holding member 11.

[Holding member]
The holding member 11 of the tube fixture 10 is formed of a resin material having a lower hardness than the clip 21. Here, it is preferable that the holding member 11 is made of a resin having a lower hardness than that of the catheter body 1, and this facilitates handling of the holding member 11. As shown in FIGS. 1 and 2, the holding member 11 includes a cylindrical holder portion 12 having a circular cross-section lumen 12a into which the catheter body 1 is inserted, and a bottom portion of the holder portion 12 (when attached to a human body). And a pair of flat airfoils 13 formed from both sides to the sides. The airfoil portion 13 is formed, for example, on a thin portion 13a that secures flexibility on the holder portion 12 side, and a thick portion 13b that secures strength through a stepped portion, and this central portion of the thick portion 13b A hole portion 14 is formed for binding the holding member 11 to the human skin or fixing portion with a suture (see FIG. 3). A slit 15 having a predetermined width communicating with the lumen 12a is formed at the bottom of the holder portion 12 at the base of the left and right airfoil portions 13 along the axial direction ( lumen axis ) O of the lumen 12a. Yes. For this reason, the holding member 11 can cover the catheter body 1 from the bottom portion by widening the slit 15. The inner diameter of the lumen 12a of the holding member 11 can be easily attached to the catheter body 1 and can be easily moved in the rotational direction and the forward / backward direction as required, and when the clip 21 is attached, the catheter body It is sufficient if 1 is a size that does not move freely. Specifically, it is preferable that the size is substantially the same as or smaller than the outer diameter of the catheter body 1 to be mounted.

  The neck portion 16 between the airfoil portion 13 and the holder portion 12 holds the catheter body 1 with the clip 21 and a pressure receiving groove 17 for preventing the clip 21 from coming off along the direction of the axis O of the lumen 12a. It is preferable to be formed. These pressure receiving grooves 17 preferably have a square cross section and are formed on flat surfaces whose bottoms are parallel to each other.

  In addition, the holder portion 12 is formed with, for example, a cylindrical main body portion 12b on which the clip 21 is fitted, and tapered portions 12f and 12r whose diameters are reduced toward the ends at the front and rear portions of the main body portion 12b. On the outer peripheral portions of the tapered portions 12f and 12r, flange portions 18f and 18r for positioning the clip 21 attached to the main body portion 12b are formed, respectively. In addition, a latching piece 19 having a latching hole 19 a is provided at the end of the holder 12.

  The material of the holding member 11 is preferably a soft polymer elastomer having rubber elasticity near room temperature, which is a material that is in close contact with the catheter body 1 and has little resistance to contact with the skin. The holding member 11 can also be made of other synthetic polymer materials having rubber elasticity near normal temperature or natural polymer materials such as natural rubber.

[clip]
2 and 3 show a holding member 11 into which the catheter body 1 is inserted, and a clip 21 attached to the holding member 11. Since the clip 21 needs to be strong enough to hold and press the holder portion 12 of the holding member 11 and fix the catheter body 1, a material harder than the holding member 11, such as polyacetal or polypropylene, is used as the material. Is done.

  The clip 21 has a C-shaped cross-section fitting body 22 that surrounds the holder portion 12, a pressure portion 23 that presses against the neck portion 16 at the opening end of the fitting body 22, and extends from the pressure portion 23 to both sides. Arm portions 24, and expansion blades 25 that are attached to the left and right arm portions 24, respectively, and are capable of expanding the pressurizing portion 23 of the fitting body 22 and separating the clip 21 from the holding member 11 according to the “lever principle”. doing.

  As shown in FIGS. 1, 7, and 9 (a), the pressurizing unit 23 opens a separation distance L in the axial center O direction on the flat surface 23 a along the axial center O direction at the opening of the fitting body 22. A plurality of, for example, three protrusions 26 are provided so as to face each other. With these protrusions 26, the three protrusions 26 bite into the bottom surface of the pressure receiving groove 17 by the restoring force using elasticity when the fitting body 22 is pushed and spread, and the circumference of the catheter body 1 is added via the neck portion 16. By increasing the frictional force between the pressing lumen 12a and the catheter body 1, the catheter body 1 can be grasped and fixed.

  The shape of the protrusion 26 is a triangular shape with a protrusion height H as viewed from the bottom, and is preferably an acute angle, and is formed in a triangular prism shape in which the top side 26 a is perpendicular to the axis O. Here, these protrusions 26 are not formed in a pyramid shape such as a quadrangular pyramid or a triangular pyramid. In the conical shape, the strength of the protrusions 26 is reduced and easily damaged, and the pressure is concentrated only on the apex. This is because a strong gripping force is hardly generated in a state in which the catheter body 1 is surrounded.

  Here, the protrusion height H of the protrusion 26 is preferably 0.15 × D or more and 0.23 × D or less with respect to the outer diameter D (mm) of the catheter body 1. This is because when the protrusion height H of the protrusion 26 is less than 0.15 × D, the biting into the holding member 11 becomes shallow, the applied pressure becomes small, and the clip 21 may easily come off. Further, when the protrusion height H of the protrusion 26 exceeds 0.23 × D, when the clip 21 is released, the amount that the clip 21 is expanded increases and the operability may be lowered. For example, in the catheter body 1 having an outer diameter of 3.3 mm, the protrusion height H of the protrusion 26 is preferably about 0.50 to 0.76 mm, and in the catheter body 1 having an outer diameter of 4.3 mm, the protrusion height of the protrusion 26 is. H is preferably about 0.65 to 1.00 mm.

  For example, a plurality of the protrusions 26 are arranged with an equal separation distance L. When the length of the neck portion 16 is 10 mm, for example, two or three are preferable for 10 mm. This is because when the number of the protrusions 26 is 1 or less, the pressure applied by the biting becomes small, and when the number of the protrusions 26 exceeds 4, the biting force is dispersed and equalized, and the gripping force is reduced as a whole. This is because that. Of course, when the length of the fitting body 22 exceeds 10 mm, the number of the protrusions 26 may be increased.

[Modification of protrusion]
Further, although the vertical apex 26a is formed on the projection 26, the same applies even if the apex 27a is a horizontal triangular prism-shaped projection 27 parallel to the axis O as shown in FIG. A gripping force can be exhibited.

  Furthermore, as shown in FIG. 9 (c), in the triangular prism-shaped protrusion (projection) 28 in which the top side 28a is continuous in a straight line in the horizontal direction, although the pressurizing force due to biting is somewhat reduced, as described later, Since the gripping force of the clip 21 with respect to the holding member 11 becomes extremely high, a structure in which the protrusion (projection) 28 is formed in the pressing portion 23 is also effective.

  In addition, although each protrusion 26-28 was made into the pointed apex side 26a-28a, even if it forms the apex side 26a in a rounded round shape, although a biting force will fall a little, it will exhibit grip power effectively. be able to.

(Expanded wing)
The arm 24 that extends outward from the opening end of the fitting body 22 supports the expanding blade 25 in a predetermined range so as to be swingable in a vertical direction via a pair of front and rear pins 24b parallel to the axis O. A hinge 29 is provided. The hinge 29 has a pair of front and rear support pieces 24 a that protrude outward from the arm portion 24, and pins 24 b that protrude from the front and rear sides, respectively. A pin 24b is rotatably fitted in the hole of the supported piece 25a. The position where the lower surface of the supported piece 25a contacts the arm portion 24 is the downward inclination limit of the expanding blade 25, and the pressure transmission portion 25b provided between the supported pieces 25a is the pressure receiving portion of the arm portion 24. The position in contact with 24c is the upper inclination limit of the expanding blade 25. Thereby, the downward inclination posture (imaginary line in FIG. 5) in which the spreading blade 25 can be superimposed on the airfoil portion 13 around the pin 24b, and the upward inclination of the upward inclination limit lifted upward. Between the postures (solid line in FIG. 5), it is freely rotatable within the range of the vertical rotation angle θu + θd. The downward rotation angle θd shown here is 60 °, and this downward rotation angle θd is the wing of the holding member 11 that curves along the skin when the tube fixture 10 is attached to a curved attachment portion such as an arm. This is to overlap the shape portion 13. This is because, after the catheter body 1 is fixed by the clip 21, a protective tape is attached to prevent the body from being caught and removed, but there is a gap between the expanding blade 25 and the airfoil portion 13. This is because the tube fixture 10 becomes bulky and easily hooked, and the risk of infection through the space increases, so that it is safer to contact the spreader blade 25 and the airfoil portion 13. Further, the upper rotation angle θu shown in the figure is 50 °, which is to spread the pressurizing portion 23 of the fitting 22 by sandwiching the left and right expanding blades 25 with the thumb and forefinger, and closes the finger. It is preferable that a force is easily applied and a sufficiently widening angle is obtained, and any angle may be used as long as an interval between the protrusions 26 that can be detached from the holder portion 12 is obtained.

  Therefore, the left and right arm portions are opened via the pressurizing transmission portion 25b and the pressure receiving portion 24c using the “leverage principle” by applying the force to the finger by picking the spreading wing 25 on the finger and opening it to the upper rotation limit. By pushing up 24, the open end of the C-shaped fitting body 22 can be opened, the pressurizing portion 23 can be opened, and the fitting body 22 can be fitted to and detached from the holder portion 12.

[Experiment]
By the way, these protrusions 26 effectively transmit a gripping force for fixing the catheter body 1 by sandwiching the neck portion 16 or the left and right pressure receiving grooves 17 and pressing the neck portion 16 or the left and right pressure receiving grooves 17. There is also an object of obtaining a grip force for preventing the clip 21 from being detached from the holding member 11 due to an external cause such as body movement or impact by being fitted into the bite 17.

Here, the experimental results of verifying the grip force will be described with reference to Table 1.
In this experiment, the fitting body 22 of the clip 21 is held by the holder portion 12, the catheter body 1 in the holder portion 12 is fixed, and the holding member 11 is attached to the fixed base with an adhesive. The metal wire previously passed through the fitting body 22 was pulled upward, and the fitting body 22 was detached from the holding member 11. The grip strength was measured by measuring the pull-out strength (tensile force) at this time.

  Six types of clips 21 of type A (conventional product, see CR in FIG. 11) to type D were prepared, and each type was tested five times to obtain an average value of the pulling force at the time of separation. Further, the holding member 11 having the pressure receiving groove 17 and the holding member 11 having the pressure receiving groove 17 are used, and the average value 1 using the holding member 11 having no pressure receiving groove 17 and the holding member having the pressure receiving groove 17 are used. An average value 2 using 11 was determined.

  According to Table 1, when the clip 21 in which the three projections 26 having the vertical side 26a are used in types C-1 to C-3, the thickness of the fitting body 22 is 0.91 mm. -2, the grip force was higher than that of the conventional metal clip CR (type A), and the type B was found to be almost equivalent to the conventional metal clip CR (type A). Further, in the experiment using the holding member 11 in which the pressure receiving groove 17 is formed, as shown in “average value 2” and “average value 2 / average value 1”, compared with the conventional metal clip CR (type A). The grip force was greatly improved, and the effectiveness of the pressure receiving groove 17 was confirmed.

  Further, as shown in FIG. 9C, the clip 21 used in the type D is formed with one protrusion 28 having a top side 28a along the axis O direction over the entire length of the pressurizing portion 23. The holding member 11 that does not have the pressure receiving groove 17 has a slightly reduced gripping force as compared with the conventional metal clip CR (type A), but the holding member 11 that has the pressure receiving groove 17 has types B to C. Compared to the above, a very large gripping force was confirmed, reaching about 4.5 times that of the holding member 11 having no pressure receiving groove 17.

As described above, it has been confirmed that when the holding member 11 having the pressure receiving groove 17 is used, the gripping force on the clip 21 is significantly increased.
[Other Examples of Pressurizing Section]
By the way, in addition to forming the pressure receiving groove 17 into which the protrusion 26 is fitted, when considering a structure for increasing the grip force, the neck portion 16 is a flat surface, and as shown in FIG. A locking groove 31 is formed on the outer surface of the member 11 near (near) the neck portion 16 along the axial center O direction, and is fitted in the locking groove 31 near the pressurizing portion at the opposing portion of the inner surface of the fitting body 22. A large grip force can be obtained by forming the protruding protrusion 32 at the opposite position. On the other hand, as shown in FIG. 10B, the protruding portion 32 may be formed on the outer surface of the holder portion 12, and the locking groove 31 in which the protruding portion 32 is fitted on the inner surface of the fitting body 22.

  According to the above embodiment, since the holding member 11 and the resin clip 21 are used, it is not necessary to remove the clip 21 at the time of X-ray, MRI, or CT inspection. In addition, since the protrusion 26 that bites into the neck portion 16 of the holding member 11 is provided in the pressurizing portion 23 of the fitting body 22 that surrounds the holder portion 12 of the holding member 11, the pressure applied to the fitting body 22 using the protrusion 26. Can be effectively transmitted to the holder portion 12 to increase the frictional force between the lumen 12a of the holding member 11 and the catheter body 1, and the catheter body 1 can be securely fixed, and the patient's body movement and fixation can be fixed. A sufficient grip force can be obtained for the clip 21 with respect to the peeling operation of the tape. Furthermore, the clip 21 can be easily detached from the holding member 11 by spreading the pressure-applying portion 23 by holding the expanding blades 25 provided on both sides of the pressure-applying portion 23 via the arm portion 24 with fingers. And can be moved easily for adjusting the position of the catheter body 1.

  Further, since a plurality of projections 26 having apex sides 26a are arranged at predetermined intervals on the pressurizing unit 23, the applied pressure can be concentrated around the apex sides 26a of the respective projections 26, and the holder unit 12 can be concentrated. By effectively increasing the frictional force between the inner lumen 12a and the catheter body 1, the catheter body 1 can be securely grasped and fixed.

  Further, since the pressure receiving groove 17 into which the protrusion 26 is fitted is formed in the neck portion 16 of the holding member 11, the grip force of the clip 21 with respect to the holding member 11 can be increased, and the clip 21 is detached due to body movement or contact. Can be prevented in advance.

  Further, the left and right spreading blades 25 are pinched with fingers in the upward tilted posture to open the pressurizing unit 23, and the fitting body 22 is detached from the holding member 11. In addition, it is closely attached to the airfoil portion 13 of the holding member 11 in a downwardly inclined posture to reduce the gap, reduce the risk of infection, and reduce the volume of the tube fixture 10. By sticking, the tube fixture 10 can be compactly attached and used.

  Further, the engaging groove 31 and the protrusion 32 that are engaged with each other are formed on the inner surface of the fitting body 22 and the outer surface of the holder portion 12 along the axis O direction. The grip force can be increased, and the detachment of the clip 21 due to body movement or contact can be prevented in advance.

[Another Example of Holding Member]
FIG. 12 shows another embodiment of the holding member. The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  In this holding member 41, the axial center O of the lumen 12a is inclined by a predetermined inclination angle α with respect to the bottom surface 13d of the airfoil 13 so that the distal end portion of the catheter body 1 is lower. The inclination angle α is represented by 3 ° in FIG. 12, but is preferably set to 1 ° to 10 °, more preferably 1 ° to 5 °, and further preferably 2 ° to 4 °. If the inclination angle α is less than 1 °, the catheter body 1 is bent due to the difference between the angle of the holding portion by the clip 21 and the angle of the catheter body 1 from the skin to the body insertion portion. And may adversely affect the catheter body 1. In addition, when the inclination angle α exceeds 5 °, the catheter body 1 is bent and lifted at the portion pressed by the tape inserted into the body from the skin, which may cause contamination or infection from the gap between the tapes.

  Accordingly, the holder portion 12 formed on the same axis as the lumen 12a is also inclined with respect to the bottom surface 13d of the airfoil portion 13, and an arrow 42 indicating an inclined lower side (catheter distal side) on the upper surface of the holder portion 12. Is formed in a convex shape. The height of the arrow 42 is slight and does not affect the gripping force of the clip 21. Of course, the arrow may be formed in a concave shape or printed on the surface.

  Further, the pressure receiving groove 43 formed in the neck portion 16 between the airfoil portion 13 and the holder portion 12 has an upper side 43a inclined parallel to the direction of the axis O of the inner cavity 12a and a lower side 43b of the airfoil portion 13. It is formed parallel to the bottom surface 13d. As a result, the pressure receiving groove 43 is formed in a tapered shape in a side view in which the front portion (the distal end side of the catheter body 1) becomes narrower. This reduces the gripping force by the protrusion 27 of the pressurizing portion 23. There is no.

  According to the holding member 41, by using the holding member 11 for a catheter, for example, the catheter body 1 led out from the body can be held in a straight state without being bent. The arrow 42 prevents the catheter body 1 from being attached in the wrong direction.

[Other Examples of Clips]
FIGS. 13A to 13C show another embodiment of the clip, and the same members as those in Embodiment 1 are denoted by the same reference numerals and description thereof is omitted.

In the clip 21 of the first embodiment, as shown in FIG. 5, the length F1 of the expanding blade 25 is set to A: with respect to the arm length A of the arm portion 24 from the expanded end of the fitting body 22 to the pin 24b. Although F1≈1: 1.2, the expanding blade 52 of the clip 51 of this embodiment has an arm of the arm portion 24 from the expanding end of the fitting 22 to the pin 24b as shown in FIG. 13 (c). With respect to the length A, the length F2 of the expanding blade 52 is set to A: F2≈1: 1.5, and the length F2 of the expanding blade 52 is extended. Here, an appropriate value of the length F2 (F1) of the spreading blade 25 with respect to the arm length A of the arm portion 24 is A: F2≈1: 1.0 to 2.2. This is because if A: F2≈1: 1.0, a force is required to expand and the operability deteriorates, and if A: F2≈1: 2.2, the value becomes bulky. In addition, there is a possibility that the clip 51 may be mistakenly removed, and the wearability is reduced. Further, the preferred value of the length F2 (F1) of the spreading blade 25 with respect to the arm length A of the arm portion 24 is preferably A: F2≈1: 1.2 to 1.8. As a result, the operability is high and the compactness is not bulky. (In the case where the outer diameter of the catheter body is 4 mm in the practical product, the arm length A is 5.5 mm, the appropriate value of the length F2 of the expanding blade 25 is 5.5 to 12 mm, and the preferred value is 6 .0 to 10 mm.)
Accordingly, the left and right spreading blades 52 can be sandwiched between the thumb and forefinger (or middle finger), and the pressurizing portion 23 of the fitting body 22 can be widened with a small clamping force, and the clip 21 is held by the holder portion of the holding member 41 (11). The operability for attaching / detaching to / from 12 is improved.

  In addition, connection holes 54 are respectively formed in the central portions of the left and right airfoil portions 13. As shown in FIG. 14 (b), these connecting holes 54 include, for example, a connecting cord (one-touch cross) 53, a hooking hole 19 a formed in the hooking piece 19 of the holding member 41 (11), and the catheter body. 1 through the tube insertion hole of the tube clip 3 fitted on one of the branch tubes 2 and connected in an annular shape, the clips (51) and 21, the holding member 41 (11) and the tube clip 3 (catheter) can be freely connected. It is for connecting with each other with a degree. Thereby, when the clips (51) and 21 are separated from the holding member 41 (11), it is possible to prevent the clips (51) and 21 from being dropped or lost. FIG. 14B shows the clips (51) and 21 before being attached to the holding member 41 (11).

O Axis of lumen A Arm length F1, F2 Length of expanding blade 1 Catheter body 10 Tube fixture 11 Holding member 12 Holder portion 12a Lumen 13 Airfoil portion 14 Hole portion 15 Slit 16 Neck portion 17 Pressure receiving groove 21 Clip 22 Fitting body 23 Pressure part 24 Arm part 25 Expanding blade 29 Hinge 41 Holding member 43 Pressure receiving groove 51 Clip 52 Airfoil part 54 Connection hole

Claims (6)

A holding member that holds the tube, and a resin clip that can hold the tube via the holding member;
The holding member is formed of a resin having a hardness lower than that of the clip, and the holding member has a holder portion having a lumen into which a tube is fitted, and an airfoil portion extending from the bottom portion of the holder portion to both sides, respectively. The bottom of the holder portion is provided with a slit formed in the axial direction of the lumen and communicating with the lumen;
A fitting that can fix the tube by gripping the neck part between the holder part and the airfoil part by the pressurization part that is formed in a C-shaped cross section and surrounds the holder part and formed at the open end. A combined wing, an arm part extending laterally from the pressurizing part, and an expansion blade supported by the arm part so as to be swingable in a vertical direction within a predetermined range and capable of opening the pressurizing part via the arm part And
Forming a pressure receiving groove in the neck portion in the axial direction of the lumen;
A protrusion for biting into the pressure receiving groove protrudes from the pressurizing portion. A medical tube fixture. 2. The medical use according to claim 1, wherein the protrusions are formed in an acute angle shape having apexes perpendicular to the lumen axis, and a plurality of the protrusions are arranged at a predetermined interval in the lumen axis direction. Tube fixture. The protrusion is formed of a single or a plurality of protrusions arranged at a predetermined interval in the lumen axis direction, having an apex along the lumen axis direction at the tip. Medical tube fixtures. The spreading wing is rotatable on the arm part between a lower inclination limit that abuts on the airfoil part and an upper inclination limit that is lifted upward via a pin parallel to the lumen axis. The medical tube fixture according to any one of claims 1 to 3, wherein the medical tube fixture is attached. The medical tube fixture according to any one of claims 1 to 4, wherein a connecting hole that is connected to at least the holding member via a connecting rope is formed in the spreading wing. The ratio of the length of the expanding blade extending outward from the arm portion to the arm length of the arm portion is set to 1.0 or more and 2.2 or less. The medical tube fixture described in 1.

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