Tube pull-out prevention device

Abstract

To provide a tube pull-out prevention device for preventing a tube (a catheter) from being pulled out intentionally or accidentally.SOLUTION: A tube pull-out prevention device 1 includes a case 10, a resistance member provided inside the case, and a mounting fixture 41 for mounting the case near a puncture site. The case 10 is comprised of upper and lower half bodies 11 and 21, which can be opened and closed, and a pull-out prevention column 14 is erected inside. The tube 2 entering the case through a hole 32 used as an inlet of the case 10, is wound around the column 14 one and half times and exits to the outside through a hole 33 used as an outlet. After the tube 2 is attached, the upper and lower half bodies 11 and 21 are closed and coupled by engagement part 34. Even when the tube 2 is pulled from the outside, the tube wound around the column 14 resists the pulling and prevents the tube 2 from being pulled out.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a pull-out prevention device for peripheral infusion tubes (including blood transfusion tubes), peripheral central venous tubes, hemodialysis tubes, and the like.

[0002] In this specification, "tube" includes a catheter, and "pull-out prevention" is a concept that includes prevention of removal, prevention of removal, etc. "Pull-out prevention" includes preventing or blocking a tube from being pulled out as a result of carelessness or accident, etc., or from being pulled out intentionally or artificially. If a tube is pulled out, a catheter or the like connected to one end of the tube and inserted into the arm or the like of the human body may come out, which could lead to a serious accident. Prior Art

[0003] An example of a device for preventing tube pullout and kinking for intravenous drip infusion etc. is described in Patent Document 1. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6656873

[0005] The tube pull-out and kink prevention device described in Patent Document 1 comprises a case having an entrance and an exit through which a tube is inserted, a drum that is rotatably mounted within the case and around which the inserted tube is wound, and elastic means that is provided between the case and the drum and that allows the drum to rotate and the tube to be pulled out when a tensile force is applied to the tube, and that reverses the drum by an elastic return force to pull back the tube when the tensile force is released.

[0006] According to the embodiment described in Patent Document 1, this pull-out and kink prevention device is attached to an infusion device. That is, the infusion device has a pole erected on a base with casters, and an infusion bag is suspended from an arm fixed to the top of this pole.

[0007] The infusion tube runs from the infusion needle (catheter) inserted into the patient's forearm, through a pull-out and kink prevention drum fixed to the bottom of the stand's pole, and then through an infusion pump installed on the stand, before being connected to the bottom of the infusion bag. The infusion device is generally placed next to the bed on which the patient is lying.

[0008] Although there is a slight amount of slack (slack) between the IV tubing connected to the IV needle inserted into the patient's forearm and the tension and kink prevention device, if the patient moves their arm more than necessary, the IV tubing may be pulled. However, the drum of the tension and kink prevention device rotates in response to the tension on the IV tubing, so the tubing is pulled out without putting a large load on the tubing or IV needle.

[0009] When the patient returns the arm to its original position, the elastic means of the tension and kink prevention device causes the drum to rotate in the reverse direction, winding up the tube so that it returns to its original position.

[0010] The IV needle inserted into a patient's arm is only secured to the arm with tape, leaving this area unprotected. Patients who require IV drips move around with the IV stand, whether they go to the toilet or undergo rehabilitation. Rehabilitation, in particular, requires patients to adopt a variety of postures and perform a variety of movements in order to restore their motor skills. At such times, patients and trainers must be extremely careful to ensure that no force is applied to the needle inserted into the arm, as this can inadvertently apply pulling force to the IV tubing.

[0011] Extraordinary accidents can also occur. It is conceivable that a confused patient, a patient with dementia, or a patient in another mentally abnormal state may intentionally or unintentionally pull on the IV tubing and pull out the IV needle. This type of accident can occur not only with IV tubing, but also with the various tubing mentioned above. Summary of the Invention

[0012] The purpose of this invention is to provide a device that can prevent the removal of a tube connected to a needle (catheter) inserted into the human body, whether intentionally or unintentionally, even if the tube is pulled with great force. This invention also aims to prevent the removal of a tube due to carelessness, even when an IV tube or other tube is inserted, without causing too much discomfort, allowing patients to live a less anxious life during treatment in a hospital, etc.

[0013] Tubes that are subject to the pull-out prevention device of this invention can be broadly divided into peripheral infusion tubes (blood transfusions are usually performed through peripheral infusion tubes, and so are included in the category of infusion tubes), peripheral central venous tubes (PICC), and hemodialysis tubes. Peripheral infusion tubes are usually inserted into the forearm or the back of the hand. In rare cases, they are also inserted into the lower limbs (lower leg and dorsum of the foot). Peripheral central venous tubes (PICC) are usually inserted into the inside of the upper arm. Hemodialysis tubes are usually inserted into the forearm. When placing an infusion tube or the like into a blood vessel, an instrument consisting of a sharp-tipped needle (inner tube) and a lumenal synthetic resin catheter (outer tube) (this entire assembly is sometimes referred to as an infusion needle) is usually inserted into the blood vessel, and after confirming that it has been placed into the blood vessel, the inner tube is removed and a synthetic resin catheter is placed into the blood vessel, to which the tubing extending out is connected.

[0014] The tube pull-out prevention device of this invention comprises a case with a hole formed on the side through which the tube passes, a resistance member provided within the case that resists the tensile force acting from outside the case on the tube exiting the hole, and an attachment for attaching the case to the wrist on the upper limb side where the puncture site (site) is located or the ankle on the lower limb side. The upper limb is a general term referring to the dorsum of the hand (back of the hand), forearm (including the wrist), and upper arm, while the lower limb is a general term referring to the dorsum of the foot, lower leg (including the ankle), and thigh. The wrist on the upper limb side where the puncture site is located specifically refers to the wrist on the arm or dorsum of the hand to which the tip of the tube that should be prevented from being pulled out is attached; for example, if the tube is attached to the right arm, it is the wrist of the right arm.

[0015] The side of the case includes the circumferential surface when the case is circular, elliptical, etc., when viewed from above. In one embodiment, two holes through which the tube passes are formed on the side of the case. In another embodiment, four holes through which the tube passes are formed on the side of the case. The number of holes formed on the side of the case may be any number other than those mentioned above, such as one, three, five or more, etc. The tube enters the case through one hole in the case and exits the case through the same hole or another hole. The above holes are used as the inlet or outlet of the tube (guide hole).

[0016] Even if the tube protruding from the hole in the case is pulled accidentally, accidentally, or intentionally, the case is attached to the wrist or ankle with a mounting bracket, and the resistance member inside the case resists the pulling of the tube, preventing the tube from moving. In this way, the tube is prevented from coming out. Furthermore, because the case is only attached to the wrist or ankle, there is little or no discomfort to the patient.

[0017] In one embodiment, the resistance member is a stopper post around which the tube is wound within the case, and all or part of a curved or straight stopper groove or stopper hole along which the tube runs. The stopper post is preferably made of a soft material, such as soft rubber. The soft material can maintain high friction with the tube. To prevent the tube from falling off, the stopper post is preferably provided with an outwardly extending flange at its top. In one embodiment, the stopper post includes a crown made of a soft material that is placed over a receiving portion within the case.

[0018] Preferably, the case has at least two sections that are separably joined by one or a combination of hinges, engaging portions (latching portions), fitting portions, and screwing portions. Hole-forming recesses are formed in each of the at least two sections, and when the sections are joined, these recesses come together to form the holes. Because the case is formed by joining at least two sections, the sections can be separated or opened (uncoupled) to insert a tube so that the resistance member acts, making it easy to operate.

[0019] As an added precaution, a clasp or lock may be provided to hold the at least two sections forming the case together.

[0020] The present invention also provides a case for the pull-out prevention device, which includes a case body having a hole formed in the side surface through which a tube passes, and a resistance member provided within the case body that resists a tensile force acting from outside the case body on the tube exiting through the hole. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a perspective view showing a state in which a tube pull-out prevention device according to a first embodiment is used. FIG. [Figure 2] The upper and lower halves of the case are opened to reveal the interior. [Figure 3] FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2. [Figure 4] 4 is a view taken along line IV-IV in FIG. 2. [Figure 5] The state in which the case is attached to the wrist is shown in cross section of the wrist. [Figure 6] The case is shown with the lock attached. [Figure 7] This is a perspective view showing the state in which another lock (padlock) is attached to the case. [Figure 8] This shows the second embodiment, with the upper and lower halves of the case open to reveal the interior. [Figure 9] FIG. 9 is a cross-sectional view taken along line IX-IX in FIG. 8. [Figure 10] FIG. 9 is a view taken along the line XX in FIG. 8. [Figure 11] The case is shown in cross section on the wrist when worn. [Figure 12] This shows the third embodiment, showing the inside of the lower half body. [Figure 13] This shows the third embodiment, showing the inside of the lower half body. [Figure 14] This shows the third embodiment, showing the inside of the lower half body. [Figure 15] FIG. 10 is a plan view showing a modified example of the case. [Figure 16] A modified version is shown, with the upper and lower halves opened to reveal the interior. [Figure 17] FIG. 17 is a front view showing a modification of FIG. 16. [Figure 18] Another variant is shown, with the upper and lower halves opened to reveal the interior. [Figure 19] FIG. 10 is a plan view showing the entirety of a pull-out prevention device for a tube having four holes according to a fourth embodiment. [Figure 20] FIG. 2 is a plan view showing the case in an open state. [Figure 21] FIG. 1 is a side view of the open case. [Figure 22] FIG. 10 is a perspective view showing the assembly of the retaining column. [Figure 23] FIG. 10 is an enlarged cross-sectional view showing a fastener provided on the case. [Figure 24] FIG. 10 is a plan view showing the case of a tube pull-out prevention device having two holes. [Figure 25] 1 shows the use of a four-hole device. [Figure 26] 10 illustrates another use of a four-hole device. [Figure 27] 10 shows a usage state of a device according to a fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION First Example

[0022] Figure 1 shows the use of a device for preventing tube pull-out according to the first embodiment. This embodiment prevents the pull-out of a tube (catheter) connected to an intravenous needle.

[0023] The tube pull-out prevention device 1 includes a case 10 and a perforated band (attachment) 41 (a band with multiple holes formed at intervals) that loosely attaches the case 10 to a person's wrist. The center of the band 41 is strongly glued to the underside of the case 10 or is fixed by other means (embedding, piercing, etc.). A piece of paper is attached to the top of the case 10, on which is printed a one-dimensional barcode 40 (or a two-dimensional code) that indicates the patient's identification code (patient number) and other information. The case 10 is composed of two halves (partial bodies) (for convenience, referred to as an upper half 11 and a lower half 21).

[0024] An intravenous needle (catheter) 3 is inserted into the forearm F, and an intravenous tube 2 connected to the intravenous needle (catheter) 3 via a connector enters the case 10 of the device 1 through an inlet (hole) 32 (see Figure 2) of the case 10, exits the case 10 through an outlet (hole) 33 of the case 10, and is connected to an infusion bag (both not shown) hanging from an intravenous stand. The intravenous needle (catheter) 3 and other parts are protected by a fixing tape 4. Near the fixing tape 4 on the device 1 side, the intravenous tube 2 is fixed to the forearm F with a tape 5, and a slight slack (indicated by symbol 2A) is secured in the intravenous tube 2 between the tape 5 and the device 1. As can be seen from Figure 1, when the forearm F to be punctured to place the intravenous tube (catheter) is the left arm (upper limb), the device 1 is also attached to the wrist of the left arm.

[0025] Fig. 2 shows the state in which the upper half 11 and lower half 21 of the case 10 are open, i.e., the inside of the case 10. Fig. 3 is a cross-sectional view taken along line III-III in Fig. 2, and Fig. 4 is a view seen from line IV-IV in Fig. 2. Fig. 5 shows the state in which the case 10 is attached to the forearm F near the wrist, in cross section of the wrist.

[0026] Referring to these figures, the upper half 11 and lower half 21 of the case 10 are joined by a hinge 31 so as to be able to open and close freely. The upper half 11 is composed of a bottom surface (corresponding to the top surface of the case 10) 12 and a frame portion 13 surrounding the bottom surface. Similarly, the lower half 21 is composed of a bottom surface 22 and a frame portion 23 surrounding the bottom surface. The upper half 11 and lower half 21 can be opened and closed freely via the hinge 31, and when closed, the case 10 as a whole becomes a slightly thin rectangular parallelepiped (with rounded corners). The central portions in the width direction of the opposing end faces (side surfaces) of the frame portions 13, 23 of the upper and lower halves 11, 21 are notched in a semicircular shape (a recess is formed) so that an inlet 32 ​​and an outlet 33 for the tube 2 are formed when the upper and lower halves 11, 21 are closed. Resistance semi-rings (inlet / outlet resistors) 35 are fixedly fitted inside this semi-circular cutout portion to stop the movement of the tube 2 (apply a slight pressure) when the upper and lower halves 11, 21 are closed. These semi-rings 35 form a ring when the upper and lower halves 11, 21 are closed, and tighten the tube 2 from the outside. The semi-rings 35 are made of soft rubber, sponge, or the like that has high friction resistance. The inlets and outlets 32, 33 may be sufficient to hold the tube 2 in place to the extent that it does not loosen within the case 10. If the lower half 21 is called the case body, then the upper half 11 can be called the lid.

[0027] A stopper column (winding column) (resistance member) 14 is fixedly erected on the bottom surface 22 in the center of the lower half body 21. A recess 15 is formed on the top surface of the stopper column 14, and a spiral groove 16 is formed on the circumferential surface. On the other hand, a protrusion 25 is fixedly formed on the inner surface of the bottom surface of the upper half body 11, which fits into the recess 15 of the column 14 when the upper and lower halves 11, 21 are closed. It is preferable to form the stopper column 14 from rubber with high friction resistance or to provide an anti-slip surface on the circumferential surface (groove 16) of the stopper column 14.

[0028] Furthermore, the frame portions 13, 23 of the upper and lower halves 11, 21 are respectively formed with a fastening groove 34A and a fastening claw 34B that engage (lock) with each other when the upper and lower halves 11, 21 are closed. The fastening groove 34A and the fastening claw 34B that make up the engaging portion 34 (fastener) may be formed on either the upper or lower half. As the fastener, instead of the engaging portion 34, a fitting portion that fits into each other may be provided around all or part of the periphery of the frame portions 13, 23.

[0029] The upper and lower halves 11 and 21 of the case 10, including the engaging portions, are preferably integrally formed from synthetic resin.

[0030] A perforated band (with multiple holes spaced along its length) (attachment) 41, firmly adhered at approximately the center to the underside of the case 10, is wrapped around the patient's wrist, and appropriate holes at both ends are aligned and fastened with hooks 42 to attach the case 10 to the patient's wrist. It is desirable that the hooks 42 are not easily separated once fastened. The perforated band 41 should be slightly loose, but not slip off the hand. The upper half 11 (lid) of the case 10 is opened, and the IV tube 2 (with the IV needle (catheter) 3 already inserted and secured with the securing tape 4) is wound around the retaining post 14 of the lower half 21 of the case 10 about one and a half times along the spiral groove 16, and the front and rear ends are fitted into the semicircular notches, and the upper half 11 is closed. This allows the tube 2 to enter the case 10 through the entrance 32, be wrapped around the retaining post 14, and exit through the exit 33. At this time, slack 2A is provided between the case 10 and the insertion site of the infusion needle (catheter) 3, and the tube 2 is fixed to the patient's forearm F with tape 5 near the insertion site. When the upper half 11 is closed, the upper and lower halves 11 and 21 are held closed by the engaging portion 34. Some infusion tubes have a connector located away from the outlet 33 of the case 10 for attachment and detachment, but in this case the tube is still restrained by the case in the same way.

[0031] Even if a pulling force is applied to the tube 2 that has come out of the case 10 through the outlet 33 due to carelessness, accident, or intentionally, the tube 2 is wrapped around the retaining post 14 inside the case 10 and is held down by the inlet and outlet 32, 33 of the case 10, so it will not come out of the case 10 due to friction (it will be fixed to the case). Because the case 10 is only loosely restrained to the wrist by the band 41, if the pulling force on the tube 2 is strong, the case 10 will move toward the hand, but it will not come out of the hand. Any movement of the case 10 is absorbed by the slack 2A, so the pulling force will not act on the intravenous needle (catheter) 3.

[0032] In this way, the tube will not be pulled out even if a strong external pulling force is applied intentionally or unintentionally due to carelessness, accident, etc. Furthermore, the tube will not be pulled out due to carelessness, etc., and the IV needle (catheter) is kept safe, allowing the patient to concentrate on medical treatment such as rehabilitation with peace of mind. Because the case 10 is loosely attached to the wrist by the band 41, the impact on the patient is similar to that of wearing a watch, and the patient will hardly feel uncomfortable even when the case 10 is attached. While it is rare for the slack portion 2A between the entrance 32 side of the case 10 and the IV needle (catheter) 3 to be pulled intentionally, if you want to prevent this, you can align the slack portion 2A with the surface of the patient's arm, cover it with a synthetic resin film, and then tape the entire periphery of the synthetic resin film to the patient's arm.

[0033] The upper and lower halves 11 and 21 of the case 10 are held closed by the engagement portion 34, but they can be forced open by a strong force. Examples of locks that more reliably keep the case 10 closed are shown in Figures 6 and 7.

[0034] In Figure 6, the lock is composed of a perforated locking band 43 and a hook 44. The locking band 43 as a lock and the band 41 as an attachment are firmly attached in this order to the underside of the case 10 (the outer surface of the bottom of the lower half 21). As described above, the band 41 is loosely attached to the patient's wrist, but the locking band 43 has both ends tightly wrapped around the case 10 in opposite directions (preferably by less than one full turn) and is secured with the hook 44 so that it cannot be released. Because the case 10 is tightly wrapped around the locking band 43, the upper and lower halves 11 and 21 cannot be opened unless the band 43 is cut with scissors or the like. In this specification, the locking band and hook are included in the concept of a lock in the sense that they physically prevent the case from being opened, rather than sealing it.

[0035] Figure 7 shows a lock that uses a padlock. Hooks 45 and 46 are fixed to the side of the upper and lower halves 11 and 21 of the case 10, opposite the hinge 31. The hook of the lock 47 is passed through these hooks to lock the case. The case 10 cannot be opened without the key.

[0036] For ease of understanding, a padlock is depicted in Figure 7, but it goes without saying that locks may be built into the upper and lower halves 11 and 21 of the case 10 (built-in lock). Also, although the anti-pullout column 14 is fixedly attached to the lower half 21, the anti-pullout column may be rotatably supported by a central shaft or receiving tube fixedly attached to the lower half 21, and a mechanism (for example, a ratchet mechanism) may be provided to prevent rotation in at least one direction to form a resistance member. Second embodiment

[0037] Figures 8 to 11 show the second embodiment. Figure 8 shows the inside of the case with the upper and lower halves opened, Figure 9 is a cross-sectional view taken along line IX-IX in Figure 8, Figure 10 is a view seen from line XX in Figure 8, and Figure 11 shows a cross-section of the wrist when the case is attached to the wrist. Components corresponding to those in the first embodiment are given the same reference numerals as in the first embodiment to avoid redundant explanation.

[0038] In the second embodiment, anti-slip grooves (resistance members) 51A and 51B are formed on the inner surfaces of the upper and lower halves 11A and 21A of the case 10A, respectively. The anti-slip grooves 51A and 51B are serpentine grooves, and when the upper and lower halves 11A and 21A are closed and their inner surfaces are joined, the anti-slip grooves 51A and 51B coincide and overlap to form a serpentine hole (anti-slip hole). The inner diameter of this hole is approximately the same as the outer diameter of the tube. The cross sections of the anti-slip grooves 51A and 51B are both semicircular, but the cross section of one groove may be slightly closer to a circle than a semicircle and the cross section of the other groove may be a semicircle with a portion missing. The portions of the upper and lower halves 11A and 21A in which the anti-slip grooves 51A and 51B are formed may also be referred to as resistance members.

[0039] In order to form the retaining grooves 51A, 51B, the upper and lower halves 11A, 21A are slightly thickened, and the lower half 21A has a frame portion 23, but the corresponding periphery of the upper half 11A is missing by the amount of the frame portion 23 (indicated by the symbol 13A). Also, the lower half 21A has band holes 52 formed diagonally to the side on the underside of both sides. In this embodiment, no resistive semi-rings are provided in the areas corresponding to the inlet and outlet (holes). It goes without saying that resistive semi-rings may, of course, be provided. The inner diameter of the inlet and outlet (hole) holes in the case 10A should be slightly smaller than the outer diameter of the tube to secure the tube more tightly. The inner diameter of the inlet and outlet of the case 10A may be such that the tube can be secured to a degree that prevents it from loosening within the case.

[0040] In this embodiment, with the upper and lower halves 11A and 21A of the case 10A open, the drip tube 2 is partially fitted along the retaining groove 51B or 51A of the lower half 21A or the upper half 11A, and then the upper and lower halves 11A and 21A are closed and joined at the engaging portion 34. The case is also firmly locked with the locking band 43.

[0041] The tube 2 is housed in a retaining hole formed by the serpentine grooves 51A, 51B, and therefore has strong resistance to pulling forces. Whether intentional or inadvertent, the tube 2 is extremely difficult to remove from the case 10A. The tube 2 is prevented from being pulled out. The perforated band 41 for attachment passes through the band hole 52 and is attached to the wrist with a hook 42. In this embodiment, the fit of the case 10A is similar to that of a wristwatch, and there is little or no discomfort. Because the tube 2 only passes through the case 10A, the thickness of the case 10A can be made thinner. Third embodiment

[0042] The third embodiment shows various forms of resistance members provided on the case to prevent it from falling out. Examples are shown in Figures 12, 13, and 14. In these figures, only the inner surfaces of the lower halves 21B, 21C, and 21D are shown.

[0043] In Figure 12, two stopper columns 53A and 53B are erected on the lower half body 21B. The inlet (hole) 32 formed on one end face (side face) of the case is located to the left in the figure, and the outlet (hole) 33 formed on the other end face (side face) of the case is located to the right. In this way, the inlet and outlet do not necessarily have to be located in the same central position on the opposing end faces of the case as shown in Figures 2 and 8, but may be located in positions offset to the left or right. The tube 2 entering the case from the inlet 32 ​​travels straight and is first hooked on the first column 53A, then turns in the opposite direction and hooks on the second column 53B, then turns again to reach the outlet 33 and exits.

[0044] In Figure 13, the anti-pullout groove (resistance member) 54 extends straight from the entrance 32 formed on the left side of the case, curves at a nearly right angle, and then curves again at a right angle toward the exit 33. The tube is placed along this groove 54. Grooves are also formed in the upper half that fit together when closed, and these grooves form a passageway (anti-pullout hole) for the tube.

[0045] In Figure 14, the case is slightly longer in the inlet / outlet direction, and three anti-pullout columns (resistance members) are provided. These columns 55A, 55B, and 55C are erected inside lower half body 21D, slightly offset left and right from the straight line connecting the inlet and outlet. Tube 2 enters the case from inlet 32 ​​and comes into contact with the left side of column 55A, then meanders to come into contact with the right side of column 55B, then bends again to come into contact with the left side of column 55C before exiting the case through outlet 33. When a tensile force acts on the tube, tube 2 resists the tensile force by pressing against these columns.

[0046] Figure 15 shows a modified case. While the cases in the previous embodiments were square when viewed from above, in Figure 15, case 10E is circular when viewed from above. In such a round case, the upper half is not connected to the lower half by a hinge but is separable from the lower half. Preferably, the upper half is connected to the lower half by interlocking, screwing, or a combination of screwing (preferably with a small rotation angle) and engagement. Of course, connection by a hinge and an engagement portion is also acceptable. The resistance members provided within the case may be either posts or grooves. Furthermore, cases of various shapes, such as oval, can be adopted. In these circular, oval, and other cases, the side on which the inlet and outlet are provided is the periphery, and the opposing positions do not necessarily have to be 180 degrees opposite. A band loop for a perforated locking band is provided on the top of the case. Passing the perforated locking band through this loop, tensioning it, and fastening it with a hook prevents the band from slipping off. Adding decorations or colorful designs reduces patient resistance.

[0047] Figures 16 to 18 use a semi-cylindrical body with high slip resistance, and all of the anti-pullout grooves are linear.

[0048] In Figures 16 and 17, a groove 56 with a semicircular cross section is formed between the inlet and outlet of the upper and lower halves 11F and 21F, and a semi-cylindrical (semicircular cross section) resistance semi-cylinder 57 with high sliding resistance is fitted into the inner surface of these grooves 56 and fixed to the groove 56.

[0049] In FIG. 18, grooves 56A and resistive semi-cylinders 57 are provided only in the portions of the upper and lower halves 11G and 21G corresponding to the inlets and outlets (holes). A retaining post may be provided in the central space of the upper and lower halves 11G and 21G. Alternatively, the upper half may be made transparent or have a lattice or mesh pattern so that the interior of the case can be seen. Furthermore, the width of the frame portion inside the case may be widened, and retaining grooves (and resistive semi-cylinders) may be formed only within the width of the frame portion where the inlets and outlets (holes) are located (common use for the inlets and outlets (holes)). The inlets, outlets, and retaining grooves may be oblique rather than perpendicular to the side (end face) of the case. The inlets and outlets may have semi-inner cylindrical portions (cylindrical portions) that protrude outward. All of these correspond to providing a resistive member within the case. It goes without saying that the features of the first, second, third, fourth, and modified embodiments may be combined, such as providing a lock for the case in the second and third embodiments described above, as well as in the fourth embodiment described below. Fourth Embodiment

[0050] The fourth embodiment of the tube pull-out prevention device is mainly of two types, namely, a device with two holes (holes) in the case and a device with four holes (holes) in the case. The types with three or five or more holes and the type with one hole will be described at the end.

[0051] First, we will explain an example device in which four holes are provided in the case. Figure 19 shows the entire device for preventing tube pullout. Figure 20 shows the inside of the case with the upper and lower halves opened. Figure 21 is a side view of the open case. When the upper and lower halves, which will be described later, are closed, the case has a thin rectangular parallelepiped shape (with rounded corners).

[0052] As in the first embodiment, the tube pull-out prevention device 101 includes a case 110 and a perforated band (attachment) 141 for loosely attaching the case 110 to a person's wrist, ankle, etc. The case 110 is made of hard plastic and includes an upper half 111 and a lower half 121 that are connected so as to be freely opened and closed by a hinge 130. The lower half 121 comes into contact with the person's skin. At the bottom surface 122 of the lower half 121, the perforated band 141 is sandwiched and fixed between the double bottom members. The outer surface of the bottom surface 122 of the lower half 121 that comes into contact with the person's skin is gently convexly curved (indicated by reference symbol 122A), which prevents sweating and provides a comfortable fit. Hook 142 of band 141 has a protrusion 142A provided at the end of the band, and is connected to the same end of the band by a connecting portion 142C, and has a holed portion 142B.

[0053] Upper half 111 has bottom surface 112 (corresponding to the top surface of the case) and surrounding frame 113. Similarly, lower half 121 has bottom surface 122 and surrounding frame 123. Semicircular cutouts (recesses) 131A, 131B, 131C, and 131D are formed in the portions of frame 113, 123 of upper and lower halves 111, 121 that are parallel to the direction in which band 141 extends, and when upper and lower halves 111, 121 are closed, these semicircular cutouts 131A, 131B, 131C, and 131D form circular holes (holes) 132A, 132B, 132C, and 132D (only holes 132A and 132B are shown in Figure 19). These holes are formed on two opposing sides of the case (sides parallel to the longitudinal direction of the band), for a total of four, and as will be seen later, are used as inlets or outlets for the tubes.

[0054] The hinge 130, which connects the upper and lower halves 111, 121 so that they can be opened and closed, is provided integrally with the case on a side perpendicular to the side on which the above-mentioned hole is formed. In the upper half 111, two engagement windows 134 are formed in the frame portion 113 on the side opposite the side on which the hinge 130 is provided. Reinforcing ribs 138 are provided at appropriate locations on the inner surface of the upper half 111.

[0055] Inside the lower half body 121, a stopper pillar (resistance member) 114 is fixedly provided on the bottom surface 122 in the center. Around this stopper pillar 114, four tube guides 125 are fixedly provided at a distance from each other along the inner surface of the frame portion 123. The inner surface of the tube guide 125 that is parallel to the band 141 is recessed in an arc shape to guide the tube wound around the stopper pillar 114. The inner surface of the bottom surface 122 around the stopper pillar 114 has a groove that is deeper than the upper surface of the frame portion 123 to allow the tube to pass through. The linear grooves in the directions connecting holes 132A and 132C and holes 132B and 132D are even deeper.

[0056] As shown in Figure 22, the retaining post 114 is composed of a receiving part 144 consisting of four small pillars fixed to the inner surface of the lower half body 121, and a cylindrical crown body 145 made of soft rubber that covers the receiving part 144. Holes are formed inside the crown body 145 to accommodate the small pillars of the receiving part 144. The crown body 145 also has a flange 145A that protrudes slightly from its upper surface toward the outer periphery. This flange 145A prevents the tube wound around the retaining post 114 from bouncing up due to its elasticity. Because the crown body 145 is made of soft rubber, there is a high frictional force between the tube wound around it.

[0057] Referring to Figure 23, lower half body 121 further has, on the side opposite hinge 130, an engagement member 135 having two engagement claws 135A at its upper end. When upper and lower halves 111 and 121 are closed, these engagement claws 135A engage with engagement windows 134 of upper half body 111, keeping upper and lower halves 111 and 121 closed. The engagement windows 134 and engagement member 135 (engagement claws 135A) form a fastener. A release pressing portion 136 is provided integrally with engagement member 135 on the outer surface of engagement member 135. The outer end of this release pressing portion 136 protrudes slightly outward from case 110. By pressing this protruding outer end with a fingertip, the upper end of the engaging member 135 bends inward as shown by the dashed line in Figure 23, and the engagement claw 135A disengages from the engaging window 134. This causes the upper and lower halves 111, 121 to open.

[0058] The engagement between the engagement claw 135A and the engagement window 134 is released and disengaged by pressing the release pressure portion 136 with a finger. In this way, an engagement device that can be released by directly operating it with a hand or finger without using a jig is a fastener. Of course, if the elasticity of the engagement member 135 is made strong, it cannot be released with one hand (a patient wearing the pull-out prevention device on one hand can only use the other hand or finger), so it is more like a lock, but a nurse can release it without using a jig. In the case where the release pressure portion 136 is kept inside the case rather than outside, a jig is needed to press the pressure portion 136 from the outside, so in this case it is a lock. This is because the jig corresponds to a key.

[0059] Next, a modified example in which two holes are provided in the case will be described with reference to Fig. 24. As can be seen from comparing Fig. 24 with Fig. 20, in this modified example, only semicircular cutout portions 131A and 131B (holes 132A and 132B) are provided in the upper and lower halves on one side of case 110A. In other words, case 110A of this pull-out prevention device 101A has two holes.

[0060] Case 110A of this modified example has two holes. A groove through which the tube passes is formed around stopper post 114 in lower half 121, and is connected to missing portions 131A and 131B. Tube guide 125 is provided around this groove in lower half 121. Other configurations, namely the fact that the upper and lower halves are connected so as to be able to open and close freely by hinge 130, and the configuration of stopper post 114, fasteners, etc., are the same as those of the embodiment with four holes. Among the two-hole cases, there are some that have hole 132A on one side and hole 132C on the other side, and some that have holes 132B and 132D.

[0061] How to use these pull-out prevention devices 101, 101A will be described with reference to Figures 25 and 26. In these figures, a four-hole device 101 (case 110) is shown.

[0062] 25, the tube 2 enters the case 110 through the circular hole 132A in the case 110, goes around the retaining post 114 once, and is pulled out to the outside through the hole 132C. Even if the tube protruding to the outside is pulled in the protruding direction, the frictional force between the tube and the retaining post 114 prevents the tube from being pulled out.

[0063] 26, the tube 2 enters through a circular hole 132A in the case 110, makes one and a half turns around the retaining post 114, and then protrudes to the outside through hole 132B. In this case, even if the part of the tube 2 protruding from the case is pulled, the tube is prevented from coming out.

[0064] The tube can be similarly prevented from coming off by using other combinations of holes 132B and 132C or combinations of holes 132B and 132D. When using device 101A with two holes, it can be used in the one and a half turn winding manner shown in Figure 26.

[0065] There is also a variant in which only one hole is provided in the case. In this case, the hole is slightly longer from top to bottom, and the tube is introduced into the case through one hole, wrapped around the retaining post one and a half times, and then led out through the same hole. The part of the tube that is introduced into the case and the part that is led out of the case overlap vertically.

[0066] Similarly, there are also variations in which a case has three or five or more holes. In this case, in particular, there will be a case that is circular when viewed from above, as shown in Figure 15. In the case of a circular case with three holes, for example, one hole may be provided within an angular range obtained by dividing 360° into thirds, and in the case of a circular case with five holes, one hole may be provided within an angular range obtained by dividing 360° into fifths. Of course, there is no limitation to dividing 360° into thirds or fifths, and one hole may be provided within any suitable angular range.

[0067] Figure 27 shows a different method of use from Figure 1. Tube 2 connected to an IV needle inserted into the forearm is introduced into one hole 132C of four-hole case 110 attached to the wrist with band 141, wound around one and a half times inside case 110, and pulled out of case 110 from other hole 132D on the same side as the hole through which the tubing was introduced, and then guided in the direction of the puncture site. This is extremely convenient because the direction in which the tubing exits case 110 can be directed in the desired direction, taking into account the placement of the IV equipment, the patient's position and posture, the position of the nurse, and other circumstances.

[0068] The above embodiment prevents the pulling out of a tube connected to an IV needle (catheter), but as mentioned above, in addition to IV tubes, there are also blood transfusion tubes (although conceptually they are included in IV tubes), peripheral central venous tubes, hemodialysis tubes, etc., each of which has a different puncture site (site). In any case, if the puncture site is on the left or right upper limb, the pull-out prevention device is attached to the corresponding left or right wrist, and if the puncture site is on the left or right lower limb, the pull-out prevention device is attached to the corresponding left or right ankle. [Explanation of symbols]

[0069] 1,1A,101,101A Tube pull-out prevention device 2. Infusion tube 2A Loose part of the drip tube 3. Intravenous needle (catheter) 4 Fixing tape 5 Tape 10, 10A, 10E, 10F, 10G, 110, 110A case 11,11A,11F,11G,111 Upper body (partial body) 12,22,112,122 bottom 13,23,113,123 Frame 14,114 Pull-out prevention column (wrapped column) (resistance member) 15 recess 16 Spiral groove 21,21A,21B,21C,21D,21F,21G,121 Lower half body (partial body) 25 Convex part 31,130 hinges 32 Entrance (hole) 33 Exit (hole) 34 Engagement part (fastener) 34A Retaining groove 34B Claws 35 Resistance semicircular body (input / output resistor) 40 Barcode 41,141 Perforated band (attachment) 42, 44, 142 Hook 43 Locking perforated band 45,46 Hanging ring 47 Padlock (Lock) 51A, 51B, 54, 56, 56A Retaining groove (resistance member) 52 Band Through 53A, 53B, 55A, 55B, 55C Pull-out prevention columns (resistance members) 57 Resistor half cylinder 125 Tube Guide 132A, 132B, 132C, 132D Hole 134 Engagement window (fastener) 135 Engagement member (fastener) 135A Engagement Claw (Fastener) 136 Release pressing part 142A Hook protrusion 142B Hook hole punched part 144 Receiving 145 Coronal body 145A flange

Claims

1. a case having a hole formed on the side through which a tube passes, a resistance member provided within the case that resists a tensile force acting from outside the case on the tube exiting the hole, and an attachment for attaching the case to the wrist on the upper limb side or the ankle on the lower limb side where the puncture site is located; A tube pull-out prevention device comprising:

2. 2. The device for preventing a tube from being pulled out according to claim 1, wherein two holes through which the tube passes are formed on a side surface of the case.

3. 2. The device for preventing a tube from being pulled out according to claim 1, wherein four holes for passing the tube are formed on a side surface of the case.

4. A tube pull-out prevention device as described in any one of claims 1 to 3, wherein the resistance member is all or part of a pull-out prevention post around which the tube is wound within the case, and a curved or linear pull-out prevention groove or pull-out prevention hole along which the tube follows.

5. 5. The device for preventing a tube from being pulled out according to claim 4, wherein the stopper posts are made of a soft material.

6. 5. The device for preventing a tube from being pulled out as set forth in claim 4, wherein the stop post has an outwardly extending flange at its upper end.

7. 5. The device for preventing a tube from being pulled out as set forth in claim 4, wherein the stop post includes a crown made of a soft material that is placed over a receiving portion in the case.

8. 4. The device for preventing tube withdrawal according to claim 1, wherein the case comprises at least two sections, which are detachably connected by one or more combinations of hinges, engagements, locks, fittings, and threaded connections.

9. 9. The tube pull-out prevention device according to claim 8, wherein a hole-forming defect is formed in each of the at least two sections, and when the sections are joined together, these defects come together to form the hole.

10. The tube pull-out prevention device according to claim 8, further comprising a fastener for holding the at least two sections forming the case together.

11. The tube withdrawal prevention device according to claim 8, further comprising a lock that holds the at least two sections forming the case together.

12. a case body having a hole formed in the side surface through which the tube passes, and a resistance member provided within the case body to resist a tensile force acting from outside the case body on the tube exiting from the hole; Case for tube pull-out prevention device.

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