JP4375324B2 - Medical tube - Google Patents

Description

  The present invention relates to a medical tube.

  A drain tube, which is one of medical tubes, is widely used as a surgical medical device for discharging body fluid, and products having various inner and outer diameters, cross-sectional structures or shapes are commercially available.

  Conventionally, a drain tube is provided with side holes and slit-shaped grooves on the side wall of the tube, and when inserted into a body fluid storage site, body fluid flows into the tube from the tip and side holes or grooves of the tube, and is discharged It has become a structure.

The drain tube is placed in the body to drain the body fluid that has exuded from the wound in order to shorten the post-surgical recovery. However, the drain tube is removed and discarded when the patient recovers sufficiently and there is no need to drain the body fluid. The drain tube needs to be designed with sufficient strength so that the entire tube can be completely pulled out by pulling the outside part.
On the other hand, when placing a tube in surgery, it is often tied to a part of the body with a thread so that the tube does not come off in the middle. There was a case where the tube was damaged by such as.

  With the conventional drain tube, if the tube placed in this way is damaged, the designed strength cannot be secured, the tube will break at the time of removal, a part of the tube will remain in the body, and the remaining open tube will be removed. It was necessary to remove some.

  As a means for increasing the strength of a tube in a medical tube, a device in which a metal wire is used in the tube and embedded in the longitudinal direction of the tube has been proposed (for example, Patent Document 1). This is certainly effective as a means for improving the strength of the tube, but the rigidity of the tube is increased, and there is a risk that the flexibility of the tube itself is impaired by the metal wire and the organ is compressed. In addition, during the indwelling procedure, not only is it difficult to cut the tube to adjust the length according to the condition of the wound, but if cut, the cut surface shape is sharp, There was a possibility that the metal wire itself could come out and injure the internal organs.

  In addition, a proposal has been made to increase the strength of a tube by embedding a plurality of yarns based on a resin such as polypropylene or polyethylene in the tube (for example, Patent Document 2). When this resinous yarn is used, a commercially available yarn is obtained by drawing a resin into a thin fiber and spinning it to improve the strength in the length direction. Since there is no property, when producing a tube made of silicone rubber, the yarn shrinks due to heating in the cross-linking step and cannot be extruded and combined at the same time. Also, when producing a tube of a thermoplastic resin other than silicone rubber, the yarn shrinks due to heating to melt the resin. In addition, in order to use a resin that has been made into a string without being stretched, there has been a problem that the tube becomes thick to obtain sufficient strength and the flexibility of the tube is impaired.

JP-A-6-154334 Japanese Patent Laid-Open No. 10-52497

  This invention is made | formed in view of the said situation, and it is providing the medical tube which can hold | maintain sufficient intensity | strength, even when the tube has a damage | wound, without impairing flexibility.

The medical tube of the present invention is
A groove or hole extending from the outer wall surface to the inner wall surface is provided in the longitudinal direction, and includes an in-vivo indwelling portion on the front end side that is indwelled in the body, and an in-vivo indwelling portion on the rear end side that discharges bodily fluids outside the body, A medical tube in which a lumen surrounded by is provided inside, and a pair of thick portions facing each other across the lumen are provided in the longitudinal direction ,
Wherein the longitudinal direction along the indwelling unit and the extracorporeal indwelling tip of the medical tubing to the rear end, a tape-shaped linear body at least a pair facing each other across said lumen, said groove or hole together they are arranged respectively on the pair of thick portions to avoid,
The linear body has a thickness of 0.1 mm or more and 0.2 mm or less, a width of 0.5 mm or more and 2 mm or less, and
The depth direction of the groove or hole is directed to the width direction of the linear body .

  In this medical tube, since a linear body is disposed in the tube, even if the tube is damaged, when the tube is pulled, a tube that does not break at the damaged portion can be provided. .

Moreover, further comprising a plurality of lumens that are partitioned by the partition walls, the thick portion at a portion with the partition wall and the inner wall surface intersect may be provided. By doing so, since the linear body can be disposed in the thick portion, the workability of the tube is improved.

  Further, the linear body may be embedded in the tube. By doing so, since the periphery of the linear body is wrapped with the resin constituted by the tube, the adhesive strength with the tube is improved, and a tube having sufficient breaking strength can be obtained.

  The linear body is a film made of any resin selected from polyester resin, polyethylene naphthalate resin, polyimide resin, polyetherimide resin, polysulfone resin, polyethersulfone resin, and polyetherpentene resin. There may be. By doing so, the strength can be improved without impairing flexibility while maintaining heat resistance.

  ADVANTAGE OF THE INVENTION According to this invention, the medical tube which can hold | maintain sufficient intensity | strength can be provided, even when the tube has a damage | wound, without impairing flexibility.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings, taking an example applied to a drain tube. In all the drawings, common constituent elements are denoted by the same reference numerals, and detailed description thereof will be appropriately omitted in the following description.

As shown in FIG. 1, the drain tube 100 is provided with a groove 102 or a hole 103 extending from the outer wall surface 108 to the inner wall surface 109 in the longitudinal direction. At least one linear body 130 is disposed along the longitudinal direction of the drain tube 100 so as to avoid the groove 102 or the hole 103. The drain tube 100 includes an in-vivo indwelling unit 110 and an in-vivo indwelling unit 120. The indwelling portion 110 is provided with a lumen 104 that functions as the liquid collection portion 106 and a groove 102 that reaches the inner wall surface 109 in the longitudinal direction of the peripheral wall portion.
The drain tube 100 may further include a plurality of lumens divided by the partition wall 150, and a thick portion 140 may be provided at a portion where the partition wall 150 and the inner wall surface 109 intersect. And it may be comprised so that the linear body 130 may be arrange | positioned in this thick part 140. FIG. When it is set as the structure by which the linear body 130 is arrange | positioned in the thick part 140, the workability of a tube improves.
The lumen 104 functions as a body fluid collection part, and the groove 102 functions as a body fluid intake part. In the present embodiment, two grooves 102 are formed from the front end side to the rear end side of the liquid collection portion 106, but the region where the grooves are provided and the number of grooves can be set as appropriate.
When the groove 102 is not collecting liquid, the side surfaces of the groove are in close contact with each other, and the tube inner peripheral surface and the tube outer peripheral surface are not in communication. By sucking the inside of the tube to a negative pressure, the groove 102 is drawn into and communicated with the inner cavity 104, and the exudate can be sucked.

The linear body 130 is not particularly limited, and may be a continuous thread-shaped body or a tape-shaped body having a resin film slit into a narrow width.
As the linear body 130, a film made of any resin selected from polyester resin, polyethylene naphthalate resin, polyimide resin, polyetherimide resin, polysulfone resin, polyether sulfone resin, and polyether pentene resin is used. Among these, it is more preferable to use a polyether pentene resin.
Moreover, although the linear body 130 is arrange | positioned in two places in FIG. 1, the number is not limited. Further, the arrangement location is not particularly limited, but it is more preferable that the arrangement location is provided in the thick portion 140 of the tube 100. By doing so, it is possible to prevent the arranged linear body 130 from being exposed from the tube outer wall surface 108 and the inner wall surface 109. Moreover, the workability of the tube is also improved.

  The thickness of the linear body 130 is preferably 0.1 mm or more and 0.2 mm or less, and if the thickness is within this range, the strength sufficient for preventing breakage can be obtained. The width is preferably 0.5 mm or more and 2 mm or less. If the width is within this range, sufficient strength can be obtained while maintaining flexibility.

Moreover, the linear body 130 and the drain tube 100 can improve the breaking strength of a tube by combining simultaneously at the time of shaping | molding. Films that have been biaxially stretched and heat-set are generally commercially available for industrial use and packaging, and are relatively easily available in the market, and there is no need to produce a new dedicated film. A biaxially stretched and heat-set resin film has high strength, is optimal for improving the breaking strength of the tube, and has high heat resistance, so that it does not shrink due to heating in the tube production process. Further, an unstretched film can be used as long as it is a resin having high heat resistance and strength called so-called super engineering plastic. These resins have high strength and rigidity, but are thin and do not impair the flexibility of the tube when combined.
Next, when a linear tape-like linear body 130 is used in the arrangement of the linear body 130, the circumferential direction of the drain tube 100 and the width direction of the tape are in the same direction as shown in FIG. It is preferable to arrange such that. By doing so, the tape can be reliably embedded in the tube.

Another embodiment is shown in FIG. The drain tube 100 includes an in-vivo indwelling unit 110 having an inner cavity 104 and an in-vivo indwelling unit 120. In the indwelling portion 110, a plurality of holes 103 reaching the inner wall surface 109 are provided in the peripheral wall portion along the longitudinal direction.
The lumen 104 functions as a body fluid collection part, and the hole 103 functions as a body fluid intake part. In this embodiment, the holes 103 are formed in two rows and four places symmetrically from the front end side to the rear end side of the liquid collection part, but the area and number of the side holes can be set as appropriate.
As in FIG. 1, the linear body 130 is a tape-shaped reinforcing material obtained by slitting a resin film into a narrow width, and is disposed in two places in FIG. 2, but the number and the number of places are not limited.

  The drain tube 100 may be made of a material commonly used for medical purposes, such as soft vinyl chloride resin, silicone resin, and urethane resin. Among these, silicone resins are more preferable. The cross-sectional shape of the drain tube may be oval or oval other than circular.

Example 1
A drain tube having the same configuration as in FIG. 2 was produced and evaluated. That is, two rolls of a 0.125 mm thick polyetherpentene resin biaxially stretched film slit into a width of 1 mm and taped are prepared, and the outer diameter is 3 using a silicone rubber material having a hardness of 70 with an extruder. A 5 mm tube was prototyped, and at that time, a tape-like film was inserted into the die portion and merged.
At the position corresponding to the indwelling portion of the manufactured tube, a sample having a wound with the same shape having a width of 2 mm using a knife and a sample having no scratch were prepared, a tensile test was performed, and the breaking strength was compared.

(Comparative Example 1)
Using a silicone rubber material having the same hardness as that of the above example, a tube having the same shape was made as a single piece of silicone rubber without compounding the tape-like film. At that time, the film was molded under the same conditions except that the tape-like film was not combined.

  Table 1 shows a comparison of the breaking strength in the tensile test. In the tube having no scratch, the silicone rubber main body has sufficient strength, so Example 1 in which the linear body is combined has almost no difference in breaking strength from Comparative Example 1 in which the linear body is not combined. However, in Comparative Example 1 in which the linear body is not combined in the tube with the scratches, the breaking strength is greatly reduced as compared with the case where there is no scratch, whereas in Example 1 in which the linear body is combined, the scratches are It can be seen that the breaking strength is hardly reduced even in the inserted tube.

It is a figure which shows an example of a drain tube, (a) is front end front view, (b) is a side view, (c) is an enlarged view of front end front view. It is a figure which shows another example of a drain tube, (a) is a front end view, (b) is a side view, (c) is an enlarged view of a front end view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Drain tube 102 Groove 103 Hole 104 Lumen 106 Liquid collection part 108 Outer wall surface 109 Inner wall surface 110 Indwelling part (liquid collection part)
120 Extracorporeal indwelling part 130 Linear body 140 Thick part 150 Partition

Claims (7)

A groove or hole extending from the outer wall surface to the inner wall surface is provided in the longitudinal direction, and includes an in-vivo indwelling portion on the front end side that is indwelled in the body, and an in-vivo indwelling portion on the rear end side that discharges bodily fluids outside the body, A medical tube in which a lumen surrounded by is provided inside, and a pair of thick portions facing each other across the lumen are provided in the longitudinal direction ,
Wherein the longitudinal direction along the indwelling unit and the extracorporeal indwelling tip of the medical tubing to the rear end, a tape-shaped linear body at least a pair facing each other across said lumen, said groove or hole together they are arranged respectively on the pair of thick portions to avoid,
The linear body has a thickness of 0.1 mm or more and 0.2 mm or less, a width of 0.5 mm or more and 2 mm or less, and
A medical tube , wherein a depth direction of the groove or hole faces a width direction of the linear body .   The medical tube according to claim 1, wherein the medical tube has a plurality of the lumens divided by a partition wall, and the thick portion is provided at a portion where the partition wall and the inner wall surface intersect.   The linear body is a film made of any resin selected from polyester resin, polyethylene naphthalate resin, polyimide resin, polyetherimide resin, polysulfone resin, polyethersulfone resin, and polyetherpentene resin. Item 3. The medical tube according to Item 1 or 2.   The medical tube according to any one of claims 1 to 3, wherein the medical tube is formed of a silicone resin, and the linear body is formed of a polyether pentene resin film.   The medical tube according to any one of claims 1 to 4, wherein the linear body is embedded in the medical tube.   The medical tube according to any one of claims 1 to 5, wherein the medical tube is a medical drain tube provided with the indwelling portion serving as a liquid collection portion.   The medical tube according to any one of claims 1 to 6, wherein the groove or hole is provided in the indwelling portion in the body.

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