JP2004237134A - Mixed injection port for medical treatment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mixed injection port for medical treatment wherein the remainder of fluid, blood or the like can be thoroughly wiped off. <P>SOLUTION: The mixed injection port includes a disk-shaped valve 1 having an insertion aperture at the central part, a base 7 which supports a lower peripheral part other than the central part of the back side surface of the valve and a cover 2 which covers at least an upper peripheral part of the valve to grip the valve other than the central part of the front surface of the valve. The thickness of the valve at the central part is thicker than the thickness of the valve at the peripheral part and the valve has a protrusion which is protruded at the center of the cover. Thereby the aperture at the center of the cover is closed by elastic stability of the protrusion when an insert which is inserted through the disk-shaped valve is subsequently removed. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

  The present invention relates to a medical co-infusion that is attached to a medical device in order to easily and reliably perform an operation when a liquid is co-injected from the outside of a liquid supply path or when a liquid is collected from the inside of a liquid supply path. About the port.

  When performing infusion or blood transfusion to a patient, it is often necessary to provide a side injection line in the main infusion path in order to mix and inject different types of liquid medicines or to sample liquid flowing in the infusion path. In such a case, conventionally, an infusion set provided with a rubber puncture co-injection port (plug) in the liquid feed path has been used, and the co-injection port has been punctured with an injection needle or the like for co-injection.

  However, in such a method, when a needle is punctured from a site other than a predetermined puncture site of the co-infusion port, there is a problem that a liquid leaks from the site or a needle is contaminated due to an operation mistake or the like. Therefore, in order to fix and hold a luer or the like (hereinafter, referred to as an “insert”) to be inserted into the co-injection port, a co-injection port capable of holding the insert has been recently considered. For example, when the male luer at the tip of the syringe is inserted into the co-injection port, the valve is opened and the liquid can be injected by pushing the lure, and when the lure is pulled out from the co-injection port, the co-injection is equipped with a valve that closes by itself. Mouth.

  However, this co-injection port needs to hold the lure in the co-injection port regardless of whether the lure (insert) is inserted into the valve (valve open) or removed (valve closed). Problems. That is, firstly, it is necessary to deepen the lure receiving portion of the co-injection port, and in such a shape, it is difficult to remove the liquid spilled from the valve, so that it becomes easy to be dirty. In addition, in the co-injection port having a deep lure receiving portion, co-injection may be started in a state where the lure has not been sufficiently inserted into the valve. In this case, if the co-injected drug solution is small, it is impossible to administer an effective amount of the drug solution. Second, the structure of the valve becomes complicated, which causes an increase in cost. Also, the more complicated the structure, the more likely the valve will fail.

  On the other hand, in a conventional co-injection port (for example, a disc-shaped elastic member provided with a valve having only a slit provided), it is difficult to insert the lure of the syringe into the co-injection port. It was difficult to reliably hold in the mixed injection port. Conventionally, a disc-shaped valve is formed of a material having high elasticity and has a simple structure in which a notch is simply formed in a thick body, so that the resistance at the time of insertion is large and the deformation of the valve at the time of holding is large. That's why. However, if the thickness of the elastic member of the valve is reduced or a material having low elasticity is used in order to reduce the resistance at the time of insertion, the check effect of the valve may be reduced and liquid leakage may occur.

  Therefore, in order to solve such a problem, a disc-shaped valve having an insertion hole formed in the center, a pedestal that carries a lower peripheral portion while leaving the center of the back surface of the valve, and a front surface of the valve, A cover that retains a valve that covers at least an upper part of the periphery of the valve while leaving a central portion, wherein the insert is inserted into the insertion hole and locked to the co-infusion port using the edge of the cover forming the fitting hole. A medical co-infusion port which has a simple structure, such as having a stopping means, and which can surely hold an insert has been considered.

  For example, a structural diagram of a conventional medical co-infusion port is shown in FIG. 1 is a three-sectional view of a conventional medical co-infusion port, FIG. 1 (a) is a longitudinal sectional view of the co-infusion port, and FIG. 1 (b) is a cross-sectional view of the co-infusion port along a cross section II. FIG. 1C shows a plan view of the co-infusion port.

In FIG. 1, 1 is a disk-shaped valve, 2 is a cover, and 3 is an insertion hole. Reference numeral 5 denotes an annular rib, reference numeral 6 denotes a fitting hole, reference numeral 7 denotes a base, reference numeral 8 denotes a flow path, reference numeral 9 denotes a hook, and the valve 1 is sandwiched between the hook 9 of the cover 2 and the annular rib 5. (See Patent Document 1).
JP-A-11-197254

  However, in the medical co-infusion port as described above, since a step is inevitably formed between the valve for holding the valve and the valve, it is necessary to wipe off the chemical or blood when it leaks to the upper part of the valve. There was a problem that it was not possible.

  For example, the shape of the valve 1 in the conventional medical co-infusion port is as shown in FIG. FIG. 2 shows the shape of the valve 1 in a conventional medical co-infusion port. FIG. 2 (a) is a plan view, and FIG. 2 (b) is a cross-sectional view taken along the line II-II.

  As shown in FIG. 2, the thickness of the valve 1 at the center portion and the peripheral edge portion is the same, so that the edge of the cover 2 forming the fitting hole 6 as shown in FIG. Inevitably, a certain level difference portion 10 is generated. Therefore, at the time of wiping residual liquid, residual blood, or the like, the presence of such a step causes a residue to be left on the step portion 10, so that it is not possible to wipe residual liquid, residual blood, or the like cleanly.

  The occurrence of such residual liquids and residual blood, etc., avoids adverse effects on the human body due to contamination with other chemicals, significantly reducing the reusability of the co-infusion port itself, and in particular, from the viewpoint of measures against infectious diseases caused by residual blood. It is strongly demanded that it can be easily wiped off.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a medical co-infusion port that can wipe off residual liquid, residual blood, etc., in order to solve the above problems.

  The medical co-infusion port of the present invention includes a disc-shaped valve having an insertion hole formed in a central portion, a pedestal supporting a lower peripheral portion except for a central portion of a back side surface of the valve, and a center of a front side surface of the valve. A medical co-infusion port comprising: a cover for covering at least an upper portion of the periphery of the valve while retaining the portion, and covering the valve, wherein the thickness at the center of the valve is greater than the thickness at the periphery of the valve. The cover is provided with a raised portion at the center of the cover, and when the inserted body inserted through the disc-shaped valve is subsequently removed, the elastic restoring force of the raised portion causes the cover to have a raised portion. The opening is closed.

  According to the medical co-infusion port of the present invention, the upper surface of the valve can be wiped clean without generating residual liquid, residual blood, etc., so that when performing blood transfusion or transfusion to a patient, careless or erroneous operation may occur. Even if a drug solution, blood, or the like leaks to the upper surface of the valve, it can be easily wiped off, and medical activities can be performed hygienically and safely.

  In the medical co-infusion port of the present invention, preferably, the medical co-infusion port further includes locking means for locking the inserted body inserted through the disc-shaped valve.

  Hereinafter, a medical co-infusion port according to an embodiment of the present invention will be described with reference to the drawings. FIG. 4 is a sectional view of the valve 1 in the medical co-infusion port according to the embodiment of the present invention. 4, the valve is a disk-shaped valve in common with FIG. 2, but differs in that the wall thickness at the center of the valve 1 is larger than the wall thickness at the peripheral edge. Note that the central portion and the peripheral portion have the valve notch 4 as a boundary.

  FIG. 5 is a cross-sectional view when the valve 1 in the medical co-infusion port according to the embodiment of the present invention is attached to the co-infusion port with the cover 2. As shown in FIG. 5, the valve 1 is mounted so as to cover the fitting hole 6 of the cover 2 because the thickness at the center of the valve 1 is large. That is, by making the difference between the thickness at the edge of the cover 2 forming the fitting hole 6 and the thickness at the center of the valve 1 and the thickness at the peripheral edge of the valve 1, the distance between the cover 2 and the valve 1 is increased. Step can be prevented from occurring.

  By adopting such a structure, a step generated between the cover 2 and the valve 1 can be eliminated. Therefore, even if a chemical solution or blood leaks to the upper surface of the valve 1, it can be easily removed. It can be wiped off, and it is possible to avoid the occurrence of residual liquid, residual blood, and the like caused by the steps.

  And because it can be wiped clean without generating residual liquid or residual blood, even if medical fluid or blood leaks to the upper surface of the valve due to carelessness or incorrect operation when performing blood transfusion or transfusion to the patient These can be easily wiped off, and medical activities can be performed hygienically and safely.

  In addition, since the thickness at the center of the valve 1 is relatively thicker than the thickness at the peripheral edge, the reaction force due to the elasticity of the valve 1 when pushing down the valve 1 when inserting the insertion body is strong, It may be difficult to insert the insert all the way into the back, or it may be difficult to hold the insert.

  Experimentally, as shown in FIG. 5, the difference D2 between the thickness at the center of the valve 1 and the thickness at the peripheral edge of the valve 1 is 60% or more with respect to the thickness D1 at the edge of the cover 2. It has been confirmed that when the content is 80% or less, the above adverse effects do not occur. The results of this experiment were obtained when synthetic isobrene rubber was used as the material of the valve 1. However, the material is not particularly limited to this. For example, silicone rubber, natural rubber, butyl rubber, nitrile rubber, etc. Similar effects can be expected even when a thermoplastic elastomer having a hardness of JIS-A: 20 to 55 represented by synthetic rubber is used.

  ADVANTAGE OF THE INVENTION According to the medical co-infusion port of this invention, when performing a blood transfusion or infusion, even if a medical solution, blood, etc. leaked to the upper surface of a valve by carelessness or erroneous operation, it can be wiped off easily, Medical activities can be performed efficiently and safely.

Three side view showing the structure of a conventional medical co-infusion port Two-sided view of valve in conventional medical co-infusion port Sectional view of a valve incorporated into a conventional medical co-infusion port Sectional view of a valve in a medical co-infusion port according to an embodiment of the present invention. FIG. 4 is a cross-sectional view of a valve in the medical co-infusion port according to the embodiment of the present invention.

Explanation of reference numerals

1 valve (disk valve)
2 Cover 3 Insertion hole (slit)
4 Valve notch 5 Annular rib 6 Fitting hole 7 Base 8 Flow path (opening)
9 Hook part 10 Step part 11 Recess

Claims (2)

A disk-shaped valve having an insertion hole formed in a central portion thereof, a pedestal for supporting a lower peripheral portion of the valve except for a central portion of a back surface of the valve, and at least a peripheral portion of the valve except for a central portion of a front surface of the valve. A medical co-infusion port comprising: a cover that covers an upper portion and holds the valve.
A thickness at a central portion of the valve is thicker than a thickness at a peripheral portion of the valve, and includes a raised portion raised at the center of the cover,
A medical co-infusion port, wherein when the inserted body inserted through the disc-shaped valve is subsequently removed, the opening of the central portion of the cover is closed by the elastic restoring force of the raised portion. . 2. The medical co-infusion port according to claim 1, further comprising a locking means for locking an insert inserted through the disc-shaped valve.

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