JP5615158B2 - Needle tip sealing device for blood collection device - Google Patents

Description

  The present invention relates to a needle tip sealing device for a blood collecting instrument that can quickly, safely and easily perform a needle tip sealing operation after blood collection.

  In the medical field, arterial blood or the like is collected in order to analyze and measure the gas partial pressure or pH in the blood. As a blood collection instrument used for this, as is well known, the tip of a syringe (outer cylinder) A needle equipped with an injection needle (needle tube) is used. Then, blood can be collected in a space surrounded by the syringe and the plunger by an operation of pulling the plunger slidably mounted in the syringe.

  By the way, when components such as oxygen and carbon dioxide in the atmosphere are mixed into the collected blood, it becomes difficult to accurately analyze and measure the gas partial pressure, pH, and the like in the blood. For this reason, conventionally, after blood collection, a cylindrical cap containing a sealing member is quickly put on the needle tube, and the tip of the needle tube is sealed by sticking the needle tip into the sealing member, and blood is collected. A device has been devised to prevent contact between blood and air.

  Therefore, when the cap is put on the needle tube after blood collection as described above, an operation of inserting the needle tip into the small-diameter opening at one end of the cap is accompanied. For this reason, blood remaining in the needle tip may adhere to the operator's hand, etc. due to slight mishandling during the work, and extreme care must be taken not to pierce the operator's finger with the needle tip. I must.

  In order to solve the problems as described above, a blood collection device in which a connecting member is attached to a hub that constitutes a base end portion that supports the needle tube, and a protector is attached via the connecting member is disclosed in the following prior art document. It is disclosed. According to the blood collection instrument disclosed in this prior art document, a bottomed cylindrical housing is slidably attached to the tip of the protector, and a sealing member is housed in the housing. .

  According to this configuration, after the blood collection, the protector attached via the connecting member is put on the needle tube, and then the bottomed cylindrical storage portion is pushed toward the needle tip, so that the needle tip pierces the sealing member. To be sealed.

JP 2007-296376 A

  By the way, according to the blood collection instrument described above, when sealing the needle tip after blood collection, it is necessary to push the bottomed cylindrical housing attached to the tip of the protector toward the needle tip with a fingertip or the like. It takes some force to perform the pushing-in operation of the housing part with a fingertip, etc., and since the force is put on the fingertip, an accident such as accidentally piercing the fingertip with the needle tip due to a slight misalignment of the hand Can occur.

  In order to prevent the occurrence of such an accident, the tip of the bottomed cylindrical storage part can be pressed against a horizontal surface such as a desk top so that the needle tip can be inserted into the sealing member in the storage part. The tip can be sealed. However, in the blood collection instrument disclosed in the prior art document, there is no consideration on the premise of the needle tip sealing operation that utilizes the above-described horizontal surface on the desk, the bottomed cylindrical There is a problem that the tip of the container slides on the horizontal surface of the desk, causing unexpected injury.

  The present invention has been made in order to solve the problems of the conventional blood collection device described above, and in the case of sealing the needle tip using a horizontal surface such as a desk, the needle tip can be safely and easily used. It is an object of the present invention to provide a needle tip sealing device for a blood collection instrument capable of performing the above sealing operation.

A needle tip sealing device for a blood collecting instrument according to the present invention, which has been made to solve the above-mentioned problems, is configured such that a hub constituting a proximal end portion of a needle tube is attached to a front end portion of a syringe, A needle tip sealing device for a blood collection instrument, wherein a protector capable of covering a needle tube is connected to the hub, wherein the protector includes a first member supported at one end connected to the hub; The other end of the first member is constituted by a second member that is slidably supported with respect to the first member, so that the length of the entire protector can be changed between an expanded state and a contracted state. A pair of grooves are formed on the inner peripheral surface of the first member, a pair of convex portions are formed on the outer peripheral surface of the second member, and the pair of convex portions formed on the second member are In the pair of grooves formed on the inner peripheral surface of the first member While being accommodated I, wherein the second member, in the process of changing to the reduced state from the extended state, a sealing member for sealing is placed the tip is the tip of the needle tube is punctured In addition, a non-slip member made of a flexible material is disposed at the tip of the second member.

  In this case, preferably, the sealing member disposed in the second member and the non-slip member disposed at the tip of the second member are integrally formed of the same material. Preferably, the anti-slip member is formed so as to protrude from the tip end portion of the second member.

  On the other hand, the first member constituting the protector is rotatably connected to the hub, and in the extended state of the protector, a slit that can accommodate the entire length of the needle tube in the protector is provided. The first member and the second member are formed respectively.

  Furthermore, it is preferable that at least one of the first member and the second member is provided with an engagement piece that prevents the protector in a state of covering the needle tube from being detached from the needle tube.

  According to the needle tip sealing device of the blood collection instrument described above, the needle tube after blood collection can be covered with a protector comprising a first member connected to the hub and a second member slidably supported by the first member. . Then, in the process of changing the lengthwise dimension of the protector from the expanded state to the contracted state, the distal end portion of the needle tube can be sealed by the sealing member disposed in the second member.

  In this case, since the anti-slip member made of a flexible material is disposed at the tip of the second member, the blood collection device and the protector are attached while the anti-slip member is brought into contact with a flat part such as a desktop. By pushing in the state where it stands upright, the length dimension of the protector can be changed from the extended state to the reduced state. As a result, the needle tip sealing operation after blood collection can be performed quickly, safely and easily.

  Further, the first member or the second member constituting the protector is formed with a slit that can accommodate the entire length of the needle tube in the protector in the extended state of the protector. By turning the protector attached to the hub, the needle tube can be easily covered with the protector.

  Since the protector that covers the needle tube through the slit is provided with an engagement piece that prevents the needle tube from being detached, the anti-slip member is placed on a flat surface such as a desktop. It is possible to improve the operability of sealing the needle tip performed while abutting, and to contribute to further improving the safety of the operation.

It is sectional drawing which showed the structure of the protector used for the needlepoint sealing device which concerns on this invention in the decomposition | disassembly state. It is a top view of the 1st member which comprises the protector shown in FIG. It is a partial cross section figure which shows the state which attached the protector to the blood collection instrument. It is an expanded sectional view of the state seen from the aa line in FIG. 3 in the arrow direction. It is a partial sectional view showing the situation where the needle tip sealing operation is performed. It is the external view which showed the condition which performs the needle tip sealing operation.

  Hereinafter, a needle tip sealing device for a blood sampling instrument according to the present invention will be described based on the embodiments shown in the drawings. A protector shown in an exploded state in FIG. 1 is used in the needle tip sealing device according to the present invention. That is, the protector P includes a first member 1 formed into a cylindrical shape with a synthetic resin, a second member 2 formed into a cylindrical shape with the same synthetic resin, and silicone, NR, IR, SBR, NBR, IIR, EPDM. And a sealing member 3 that also serves as an anti-slip member formed of a flexible material such as rubber or other elastomers such as styrene, olefin, urethane, and polyurethane.

  The first member 1 constituting the protector P is formed in a cylindrical shape as described above, so that the center is formed into the hollow portion 1a, and the support portion 1b is provided on the base end (one end) side of the first member 1. It is formed to be extended. On the further base end side of the support portion 1b, as shown in the top view of the first member 1 in FIG. 2, a pair of support shafts 1c are provided on both outer sides in a direction perpendicular to the longitudinal direction of the support portion 1b. It is formed in a protruding state.

  A slit 1d is formed over the entire length of the first member 1 at a position facing the cylindrical surface on which the support portion 1b is extended. Further, a pair of groove portions 1e reach from the front end portion (the other end portion) to the vicinity of the base end portion (the one end portion) at a position opposed to the inner peripheral surface of the first member 1 with the slit 1d at the center. Is formed.

  On the other hand, the second member 2 is formed in a cylindrical shape as described above, so that the center thereof is formed in the hollow portion 2a, and the outer peripheral surface thereof is in contact with the hollow portion 1a of the first member 1 to be a shaft. It is shaped to be slidable in the direction. A pair of convex portions 2b are formed at positions opposite to the outer peripheral surface of the second member 2 so as to reach from the proximal end portion (one end portion) to the vicinity of the distal end portion (the other end portion).

  That is, when the second member 2 is slidably supported in the hollow portion 1 a of the first member 1, the pair of convex portions 2 b formed on the second member 2 are It is comprised so that it may accommodate along a pair of groove part 1e formed in the internal peripheral surface. As a result, the second member 2 can slide in the axial direction with respect to the first member 1 and is restricted in the rotational direction, so that the overall length dimension of the protector P can be changed between the expanded state and the contracted state. To be made.

  In addition, a slit 2c is formed in the second member 2 so as to reach from the proximal end portion to the vicinity of the distal end portion, and the second member 2 is slidably attached to the first member 1. In some cases, the formation position of the slit 1d formed in the first member 1 and the formation position of the slit 2c formed in the second member 2 coincide with each other.

  Further, a flexible engaging piece 2 d is formed integrally with the second member 2 so as to protrude to the center of the hollow portion 2 a at the formation position of the slit 2 c in the second member 2. The operation of the engagement piece 2d will be described later.

  The sealing member 3 also serving as the anti-slip member is composed of a columnar part 3a and a non-slip member 3b formed integrally with the columnar part 3a. The columnar portion 3a of the sealing member 3 is attached to the second member 2 by being press-fitted into the hollow portion 2a on the distal end portion side of the second member 2, and the anti-slip member 3b made hemispherical. Is in a state of protruding from the tip of the second member.

  FIG. 3 shows a state in which the protector P is formed by assembling the first member 1, the second member 2, and the sealing member 3 also serving as an anti-slip member shown in FIGS. A part thereof is shown in a sectional view.

  As is well known, the blood collection instrument is configured such that a hub 6a constituting a proximal end portion of a needle tube (injection needle) 6 is attached to a reduced diameter portion 5a formed at a front end portion of a syringe (outer cylinder) 5. Yes. Then, blood can be collected in a space surrounded by the syringe 5 and the plunger by an operation of pulling a plunger (not shown) slidably mounted in the syringe 5.

  A connecting member 7 is attached to the hub 6a in the blood collection device described above so as to surround the hub 6a. The pair of engaging holes 7a formed in the connecting member 7 are formed in the first member 1. The protector P is rotatably connected to the blood collection device by fitting the pair of support shafts 1c so as to be rotatable.

  Thus, as shown in FIG. 3, the protector P includes a first member 1 having one end connected to the hub 6 a and rotatably supported, and the other end of the first member. It is comprised from the 2nd member 2 which can change the dimension of the length direction of the whole protector to an expansion | extension state and a contraction state by being slidably supported, The sealing member 3 is arrange | positioned in the said 2nd member 2 At the same time, the anti-slip member 3b made of a flexible material is disposed at the tip of the second member 2.

  In this configuration, when the length dimension of the entire protector is extended, the first member 1 and the second member 2 are mechanically locked, and the length dimension is reduced. It is desirable to form a lock mechanism (not shown) that mechanically locks the first member 1 and the second member 2 when the state is achieved. A simple configuration of this locking mechanism can be realized by forming, for example, an uneven portion (not shown) between the first member 1 and the second member 2 so as to face each other.

  As shown in FIG. 3, when blood collection is performed with the protector P attached to the blood collection device, the protector P is brought down to the blood collection device side. After blood collection, the protector P is rotated toward the needle tube (injection needle) 6 side, that is, as shown by the arrow b. In this case, the protector P is rotated in a state where the dimension in the length direction is extended.

  Thereby, the needle tube 6 is covered with the protector P as shown by the solid line in FIG. 3 through the slits 1d and 2c formed in the first member 1 and the second member 2 constituting the protector P, respectively.

  FIG. 4 shows this state in a cross-sectional view orthogonal to the longitudinal direction of the needle tube 6. As shown in FIG. 4, at the moment when the needle tube 6 is covered by the protector P, the flexible engagement piece 2d formed on the second member 2 is pushed by the needle tube 6 to be deformed, and the needle tube 6 is deformed. Acts to be positioned inside the slit 2c. As a result, the needle tube 6 comes into contact with the opposite surface of the engagement piece 2 d, and the engagement piece 2 d is locked to the needle tube 6. Therefore, the protector P is held in a state of covering the needle tube 6, and the protector P is prevented from returning to the original state.

  FIG. 5 shows an operation example in which the tip of the needle tube 6 is sealed after the needle tube 6 is covered with the protector P. For this purpose, for example, a flat surface portion 8 such as a desk is used. That is, as shown in FIG. 5A, with the protector P facing downward, a rubber anti-slip member 3b disposed at the tip of the protector P is brought into contact with the flat surface portion 8, and the blood collecting instrument and The first member 1 is pushed in the direction of arrow c.

  By this operation, the second member 2 on the tip end side of the protector P slides into the first member 1 side, and the length of the protector P is determined from the extended state as shown in FIG. A reduced state is achieved. At this time, the distal end portion of the needle tube 6 is pierced and sealed by a rubber sealing member 3 disposed in the second member 2, so that contact between the collected blood and the atmosphere is prevented. To be made.

  In the above-described sealing operation of the needle tube 6, the needle tube 6 is covered with the protector P, and the engaging piece 2d formed integrally with the second member 2 is engaged with the needle tube 6 as described with reference to FIG. Therefore, it can be reliably prevented that the protector P is detached and the needle tube 6 is exposed.

  Moreover, since the anti-slip | skid member 3b shape | molded hemispherically, for example with the rubber raw material is attached to the front-end | tip part of the protector P, it is not necessary to contact the protector P perpendicularly with respect to the plane part 8, The angle Even if there is a slight deviation, normal pushing operation can be performed. As a result, the needle tip sealing operation after blood collection can be performed quickly, safely and easily. In addition, although not shown in figure, it is desirable to form many groove | channels or unevenness | corrugations in the hemispherical surface in the said anti-slip | skid member 3b, and this can further improve an anti-slip effect.

  FIG. 6 shows a change in the appearance of the protector P when the length dimension of the protector P is changed from the expanded state to the contracted state as described above. In this case, the tip of the needle tube 6 is shown in FIG. The part is sealed by the rubber sealing member 3 disposed in the second member 2 as described in FIG.

  In addition, in the example shown in FIG. 6, for example, a colored layer indicated by X is provided on the distal end side (front half) of the first member 1. Further, the base end side of the second member 2 is in a state where the uncolored portion, that is, the synthetic resin material is exposed as indicated by Y, and the tip end side (front half) of the second member 2 is Z For example, a colored layer is shown.

  That is, when the protector P is in the extended state, as shown in FIG. 6 (A), the colored layer X on the first member 1 side and the colored layer Z on the second member 2 side, as shown in FIG. The uncolored portion Y of the second member 2 can be seen. Further, when the protector P is contracted and the tip of the needle tube 6 is sealed by the rubber sealing member 3 disposed in the second member 2, FIG. As shown, the non-colored portion Y cannot be seen between the colored layer X on the first member 1 side and the colored layer Z on the second member 2 side.

  In this case, by making the colored layer indicated by X and the colored layer indicated by Z the same color, it can be expected that the uncolored portion Y exists more clearly. The Z portion may be uncolored and the Y portion may be a colored layer. The selection of coloring and non-coloring in the X, Y, and Z regions, and the selection of the color are arbitrary.

  According to the above-described embodiment, since the anti-slip member made of a flexible material is disposed on the front end portion side of the protector P, the protector is moved while abutting the anti-slip member against a flat part such as a desk. By pushing from the expanded state to the contracted state, the needle tip sealing operation after blood collection can be performed quickly, safely and easily. Can be obtained.

  In the embodiment described above, the first member 1 and the second member 2 constituting the protector P are both formed in a cylindrical shape, but these are formed in a rectangular tube shape such as a square or a triangle, for example. The formed one can also be adopted. Further, the protector P uses the sealing member 3 that also serves as a non-slip member integrally formed of a rubber material or the like. However, these may be individually molded and disposed on the protector P. .

  Furthermore, although the said anti-slip | skid member 3b uses the thing in which the protrusion part was formed in the hemisphere, it is not restricted to this, Other arbitrary structures are employable. Furthermore, in the above-described embodiment, the second member 2 that constitutes the protector P is formed with the engagement piece 2d that is locked to the needle tube 6, but this is on the first member 1 side. It may be formed.

DESCRIPTION OF SYMBOLS 1 1st member 1a Hollow part 1b Supporting part 1c Support shaft 1d Slit 2 2nd member 2a Hollow part 2c Slit 2d Engagement piece 3 Sealing member 3a Columnar part 3b Non-slip member 5 Syringe (outer cylinder)
6 Needle tube (injection needle)
6a hub 7 connecting member 7a engagement hole P protector

Claims (5)

A blood collection device is configured by attaching a hub constituting the proximal end portion of the needle tube to the front end portion of the syringe, and a protector that can cover the needle tube is connected to the hub, and the needle tip of the blood collection device is provided. A device,
The protector has a first member whose one end is connected to and supported by the hub, and is supported by the other end of the first member so as to be slidable with respect to the first member. It is composed of a second member whose vertical dimension can be changed between an expanded state and a reduced state,
A pair of grooves are formed on the inner peripheral surface of the first member, a pair of convex portions are formed on the outer peripheral surface of the second member, and the pair of convex portions formed on the second member are While being accommodated along a pair of grooves formed on the inner peripheral surface of the first member,
In the second member, there is disposed a sealing member that is inserted into the distal end portion of the needle tube to seal the distal end portion in the process of changing from the extended state to the reduced state, and the second member An anti-slip member made of a flexible material is disposed at the distal end portion.   The sealing member disposed in the second member and the anti-slip member disposed at the tip of the second member are integrally formed of the same material. A needle tip sealing device for a blood collection instrument.   The needle point sealing device for a blood collecting instrument according to claim 2, wherein the anti-slip member is formed in a state of protruding from a tip end portion of the second member.   The first member constituting the protector is rotatably connected to the hub, and in the extended state of the protector, a slit that can accommodate the entire length of the needle tube in the protector, The needle tip sealing device for a blood collection device according to any one of claims 1 to 3, wherein the needle tip sealing device is formed on each of the first member and the second member.   The at least one of the first member and the second member is provided with an engagement piece that prevents the protector covering the needle tube from being detached from the needle tube. 5. A needle tip sealing device for a blood collection instrument according to any one of 4 above.

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