JP2008245853A - Protector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a protector which reliably prevents blood adhered to a needle point from scattering when covering the needle point of a used puncture instrument. <P>SOLUTION: The protector 1 is used by attaching to the puncture instrument 10 equipped with a needle tube, a hub provided on the proximal end side of the needle tube, and a tube 17 which is connected to the proximal end part of the hub and communicates with the needle tube through the hub. The protector 1 is equipped with an outer cylinder 2 which is provided to move along the tube 17 in the longitudinal direction and has a fixing means for fixing the outer cylinder relative to the puncture instrument 10, an inner cylinder 3 provided to move in the longitudinal direction relative to the outer cylinder 2, and an operation means for operating to move the inner cylinder 3 between a first position in which the inner cylinder 3 is housed in the outer cylinder 2 and a second position in which the inner cylinder 3 moves in the direction of the distal end from the first position to protrude from the outer cylinder 2. The needle point is exposed when the inner cylinder 3 is in the first position with the outer cylinder 2 fixed to the puncture instrument 10, and the needle point of the needle tube is covered by the inner cylinder 3 when the inner cylinder 3 is in the second position. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a protector used by being attached to a puncture device.

  When blood collection or drug administration is performed, a puncture device is punctured into a blood vessel of a blood donor or patient. Such a puncture device includes a needle tube (needle body) having a sharp needle tip at a distal end, a hub fixed to a proximal end portion of the needle tube, and a tube connected to the proximal end portion of the hub. .

  When blood collection or drug administration is completed, the used puncture device is discarded because it is no longer necessary. At this time, the puncture device is discarded in a state where the needle tube and the hub are housed in a protector (protection device) (see, for example, Patent Document 1).

  The protector described in Patent Document 1 is composed of a cylindrical body having a distal end opening and a proximal end opening, and is installed on the tube so as to be movable along the longitudinal direction thereof. Inside the protector, there are provided a first locking piece (suppressing means) and a second locking piece (fixing means) located on the base end side from the first locking piece. At least one of these locking pieces is locked to the hub of the puncture tool, so that the protector is fixed to the puncture tool.

  The protector described in Patent Document 1 is fixed to the base end side of the hub, that is, in the middle of the tube, and is in a state of being retracted from the needle tube (retracted state) when blood collection or drug solution administration is performed using a puncture device. Further, after the blood collection and the administration of the drug solution are finished, the tube is pulled in the proximal direction with respect to the protector, whereby the protector is in a state (accommodated state) in which the needle tube and the hub are accommodated.

  However, in the protector described in Patent Document 1, when the hub gets over the first locking piece (or the second locking piece) and enters the retracted state, the protector is applied to the protector by the elastic force of the first locking piece. There was a problem that the vibration was transmitted and blood adhering to the needle tip was scattered through the tip opening of the protector.

Japanese Patent No. 3578591

  An object of the present invention is to provide a protector that can reliably prevent the scattering of blood adhering to the needle tip when covering the needle tip of a used puncture device.

Such an object is achieved by the present inventions (1) to (12) below.
(1) A needle tube having a sharp needle tip at the tip, a hub installed on the proximal end side of the needle tube, and a tube connected to the proximal end portion of the hub and communicating with the needle tube through the hub A protector used by being attached to a puncture device provided with
An outer cylinder that is provided movably along the longitudinal direction of the tube and has a fixing means fixed to the puncture device;
An inner cylinder housed inside the outer cylinder and provided to be movable in the longitudinal direction of the outer cylinder;
Operation means for moving the inner cylinder to a first position housed in the outer cylinder and a second position protruding from the first position and projecting from the outer cylinder. ,
When the inner cylinder is in the first position with the outer cylinder fixed to the puncture device, the needle tip is exposed, and when the inner cylinder is in the second position, the inner cylinder The protector is configured to cover the needle tip of the needle tube.

  (2) The operation means includes a guide groove formed along a longitudinal direction of the tube wall of the outer cylinder, and an operation piece formed along an outer peripheral portion of the inner cylinder and moving along the guide groove. The protector according to (1) above.

(3) The guide groove has, at its base end portion, a base end side widened portion with an increased width,
The operation means has a biasing portion that biases the operation piece toward one edge of the guide groove,
When the inner cylinder is located at the first position, the operation piece enters the proximal-side widened portion and is biased by the biasing portion, so that a step on the distal end side of the proximal-side widened portion The protector according to (2), wherein the first position of the inner cylinder is held by being locked to a portion.

(4) The guide groove has a front end side widened portion whose width is increased at a front end portion thereof.
The operation means has a biasing portion that biases the operation piece toward one edge of the guide groove,
When the inner cylinder is positioned at the second position, the operation piece enters the distal end side widened portion and is biased by the biasing portion, so that the stepped portion on the proximal end side of the distal end side widened portion The protector according to (2) or (3), wherein the second position of the inner cylinder is held by being locked to.

  (5) The protector according to any one of (1) to (4), wherein the fixing means can select a fixed state in which the fixing device is fixed and a released state in which the fixed state is released.

  (6) The operation means operates the fixing means so as to change from the released state to the fixed state as the inner cylinder moves from the first position to the second position. The protector as described in said (5) comprised.

  (7) The protector according to any one of (1) to (6), wherein the fixing means is configured to be fixed to the tube.

  (8) The said fixing means is provided inside the said outer cylinder, The said tube is clamped and it is comprised by the several clamping piece which fixes the said outer cylinder with respect to the said tube. Protector.

  (9) In the above (8), each of the sandwiching pieces has a long shape in which one end portion is supported by the proximal end portion of the outer cylinder and the other end portion extends to the distal end side of the outer cylinder. Protector.

  (10) The protector according to (8) or (9), wherein a tip of each clamping piece abuts on the hub and functions as a positioning unit that positions the protector with respect to the puncture device.

  (11) The operating means includes a pressing portion that presses one of the pair of sandwiching pieces toward the other when the inner cylinder is moved from the first position to the second position. The protector according to any one of (8) to (10) above.

(12) The inner cylinder includes a pressing portion that is provided on an inner peripheral portion thereof and presses the clamping pieces in a direction approaching each other when the inner cylinder is positioned at the second position. ) The protector according to any one of the above.
The inner cylinder preferably has a shape in which rotation is restricted with respect to the outer cylinder.

  According to the present invention, when the inner cylinder is moved from the first position to the second position, the inner cylinder can move without contacting the puncture tool. Thereby, when covering the needle tip of a used puncture device, it is possible to reliably prevent blood adhering to the needle tip from being discharged (eg, scattered or leaked).

  In addition, since blood is prevented from being discharged, bacterial infection or the like due to blood can be prevented during disposal. In addition, since the needle tip is covered with the inner cylinder at the second position, it is possible to prevent an accident that a finger or the like is accidentally pierced with the needle tip. Thus, the protector is extremely excellent in terms of hygiene and safety.

  Further, when the outer cylinder has a pair of clamping pieces, when the inner cylinder is moved from the first position to the second position, the position of the protector with respect to the puncture tool is securely fixed, and the movement operation is performed. It can be done easily. Further, the needle tip is surely covered by the inner cylinder moved to the second position.

Hereinafter, a protector of the present invention will be described in detail based on a preferred embodiment shown in the accompanying drawings.
1 to 3 are perspective views sequentially showing the use state of the protector according to the present invention (FIG. 1 is a view showing a state where the protector is separated from the hub and the inner cylinder is in the first position, and FIG. 2 is a view showing the protector. FIG. 3 is a diagram showing a state in which the puncture tool is positioned and the inner cylinder is in the first position. FIG. 3 is a diagram showing a state in which the protector and the puncture tool are positioned and the inner cylinder is in the second position. 4 is an enlarged detailed view near the distal end of the outer cylinder of the protector shown in FIG. 2, FIG. 5 is an enlarged detailed view near the proximal end of the outer cylinder of the protector shown in FIG. 2, and FIG. 6 is shown in FIG. FIG. 7 is an enlarged detail view near the base end of the protector outer cylinder shown in FIG. 3, and FIG. 8 is a longitudinal sectional perspective view of the protector shown in FIG. FIG. 9 is a transverse sectional view of the protector of the present invention, and FIG. 10 is a longitudinal sectional perspective view of the outer cylinder of the protector of the present invention. , 11, the inner cylinder perspective view of the protector of the present invention, FIGS. 12 and 13, respectively, an enlarged detail view of the vicinity of the base end portion of the inner cylinder shown in FIG. 11. In the following, for convenience of explanation, the upper side in FIGS. 1 to 8 and FIGS. 10 to 13 is referred to as a “tip” and the lower side is referred to as a “base end”.

  As shown in FIGS. 1 to 3, the protector 1 of the present invention is used by being mounted on a puncture device 10. In addition, what attached the protector 1 to the puncture tool 10 is called a puncture needle assembly.

  Before describing the protector 1, the puncture device 10 to which the protector 1 is attached will be described.

  The puncture device 10 is used by puncturing blood vessels of blood donors and patients, for example, at the time of blood collection or chemical solution injection.

  As shown in FIGS. 1 and 2, the puncture device 10 includes a hollow needle (needle tube) 11, a hub 13 installed on the proximal end side of the hollow needle 11, and a tube connected to the proximal end portion 138 of the hub 13. 17.

  The hollow needle 11 is made of, for example, a metal material such as stainless steel, and a sharp needle tip (blade tip) 12 is formed at the tip thereof. The shape of the needle tip 12 is not particularly limited, and in the present embodiment, the needle tip 12 has a shape having a blade surface inclined at a predetermined angle with respect to the axis of the hollow needle 11.

  A substantially cylindrical hub 13 is fixed to the proximal end portion of the hollow needle 11 in a liquid-tight manner by, for example, a method such as fitting, caulking, fusing, and adhesion using an adhesive. The hub 13 communicates with the hollow needle 11. The hub 13 is preferably made of transparent (colorless and transparent), colored transparent or translucent resin, and the internal visibility is ensured. Thereby, the flashback of blood when the needle tip 12 secures the blood vessel can be visually confirmed.

  The distal end portion of the tube 17 having flexibility is connected to the proximal end portion 138 of the hub 13 in a liquid-tight manner. The tube 17 communicates with the hollow needle 11 via the hub 13. Thereby, the passage of liquid (for example, infusion or blood) from the hollow needle 11 to the tube 17 or from the tube 17 to the hollow needle 11 becomes possible.

  In addition, the proximal end portion of the tube 17 is connected to a part of an infusion circuit having an infusion bag when the puncture device 10 is used for infusion, for example, and when the puncture device 10 is used for blood collection, a blood collection device having a blood collection bag And a part of a blood collection circuit having a blood separator.

  Although it does not specifically limit as a constituent material of the tube 17, For example, a polyvinyl chloride, polybutadiene, etc. are mentioned.

  Note that the puncture device 10 is preferably fitted with a cap on the hollow needle 11 when not in use. Thereby, the erroneous puncture by the needle tip 12 can be prevented reliably.

  The protector 1 attached to such a puncture device 10 is installed so as to be movable along the longitudinal direction of the tube 17 with respect to the puncture device 10. This protector 1 is located on the proximal end side from the hub 13, and is retracted from the hollow needle 11 and the hub 13 (see FIG. 1), and moved from the retracted position in the distal direction to the puncture device 10. And a positioning state in which positioning is performed (see FIGS. 2 and 3).

  The protector 1 has an outer cylinder 2 provided so as to be movable along the longitudinal direction of the tube 17 and an inner cylinder 3 provided inside the outer cylinder 2 so as to be movable along the longitudinal direction. ing. In the positioning state, the inner cylinder 3 is moved to the first position (see FIG. 2) housed in the outer cylinder 2 and the distal position from the first position and protrudes from the outer cylinder 2 (see FIG. 2). 3). Hereinafter, the configuration of each unit will be described.

  The outer cylinder 2 is formed of a cylindrical body having a substantially square cross section and having both ends opened, that is, having a distal end opening 23 and a proximal end opening 24. The outer cylinder 2 is a gripping part that is gripped by the user when the entire protector 1 is moved along the longitudinal direction of the tube 17 or when the inner cylinder 3 is moved along the longitudinal direction of the outer cylinder 2. Function as.

  A large number of ribs 25 are arranged along the longitudinal direction of the outer cylinder 2 on the outer peripheral portion of the outer cylinder 2. Each rib 25 is formed in a single letter shape along the circumferential direction of the outer peripheral portion of the outer cylinder 2. Such a rib 25 can reliably prevent the outer cylinder 2 from slipping when the outer cylinder 2 is gripped.

  As shown in FIGS. 1 to 7, a long guide groove 21 (operation means) is formed along the longitudinal direction of one of the four tube walls of the outer cylinder 2. . The guide groove 21 is a part where an operation piece (operation means) 31 of the inner cylinder 3 to be described later moves along the forming direction. The length of the guide groove 21 is set to be approximately equal to the amount of movement (movement length) by which the inner cylinder 3 moves from the first position to the second position.

  The guide groove 21 is formed with a distal end side widened portion 211 and a proximal end side widened portion 212 having increased widths at the distal end portion and the proximal end portion, respectively. Hereinafter, a portion between the distal end side widened portion 211 and the proximal end side widened portion 212 of the guide groove 21, that is, a portion excluding the distal end side widened portion 211 and the proximal end side widened portion 212 is referred to as a “narrow width portion 213”. .

  As shown in FIGS. 1, 2, and 5, when the inner cylinder 3 is located at the first position, the operation piece 31 enters the proximal end side widened portion 212. As a result, the operation piece 31 comes into contact with the stepped portion 214 formed at the boundary between the base-side widened portion 212 and the narrow-width portion 213 and changing in width. As a result, the movement of the inner cylinder 3 in the distal direction is surely restricted, and thus the inner cylinder 3 in the first position is prevented from being unintentionally positioned in the second position. In this state, since the needle tip 12 of the puncture device 10 is reliably exposed, puncturing with the needle tip 12 can be performed reliably.

  In the protector 1, it can be said that the operation piece 31 and the stepped portion 214 constitute first locking means for holding the first position of the inner cylinder 3.

  As shown in FIGS. 3 and 6, when the inner cylinder 3 is positioned at the second position, the operation piece 31 enters the distal end side widened portion 211. As a result, the operation piece 31 comes into contact with a stepped portion 215 that changes in width and is formed at the boundary between the wide end portion 211 and the narrow portion 213. As a result, the movement of the inner cylinder 3 in the proximal direction is surely restricted, and thus the inner cylinder 3 in the second position is prevented from being inadvertently positioned in the first position. In this state, the needle tip 12 of the puncture device 10 is reliably covered with the protector 1 (inner cylinder 3), so that it is possible to reliably prevent a finger or the like from being accidentally pierced with the needle tip 12.

  In the protector 1, it can be said that the operation piece 31 and the stepped portion 215 constitute second locking means for holding the second position of the inner cylinder 3.

  In addition, the distal end side widened portion 211 is formed with a missing portion (engagement portion) 216 with which a part of the operation piece 31 engages at the proximal end portion thereof (see, for example, FIGS. 4 and 6). ). When a part of the operation piece 31 is engaged with the missing part 216, the operation piece 31 is prevented from entering the narrow width part 213 again. As a result, the movement of the inner cylinder 3 in the proximal direction is more reliably regulated, and thus the inner cylinder 3 at the second position is reliably prevented from being unintentionally positioned at the first position.

  As shown in FIGS. 8 to 10, the outer cylinder 2 serves as a fixing means for holding the tube 17 and fixing it to the tube 17 when the inner cylinder 3 moves from the first position to the second position. It has a pair of clamping pieces (fixing means) 22a and 22b. Each of the sandwiching pieces 22a and 22b has an elongated shape with a circular cross section, and one end (base end) is supported by the base end of the outer cylinder 2, and the other end (tip) Part) extends to the distal end side of the outer cylinder 2. By pressing at least one of the sandwiching pieces 22a and 22b (the sandwiching piece 22a in the configuration shown in FIG. 9), the interval between the sandwiching piece 22a and the sandwiching piece 22b is surely narrowed, and therefore located between them. The tube 17 can be reliably clamped, and the protector 1 is in a fixed state in which it is fixed to the puncture device 10 (tube 17).

  The clamping force between the clamping piece 22a and the clamping piece 22b is preferably set to such an extent that the lumen of the tube 17 is not blocked.

  Moreover, if the press with respect to the clamping piece 22a by the operation piece 31 is cancelled | released, a fixed state will be cancelled | released and it will be in a cancellation | release state.

  Thus, in the protector 1, the fixed state and the release state by the pair of sandwiching pieces 22a and 22b can be selected. For example, in the released state, the protector 1 can be moved along the tube 17, so that the protector 1 can be in the retracted state (see FIG. 1). Thereby, when puncturing with the puncture tool 10, it can prevent that the protector 1 becomes obstructive.

  As shown in FIGS. 8 and 10, tapered portions 221 whose thickness gradually decreases in the proximal direction are provided at the distal ends of the sandwiching pieces 22 a and 22 b, respectively. Each tapered portion 221 is a portion that is pressed by a later-described pressing portion 33 of the inner cylinder 3 when the inner cylinder 3 is in the second position (see FIG. 8). When the taper portions 221 are pressed by the pressing portions 33, the holding state of the holding pieces 22a and 22b with respect to the tube 17 is maintained. Thereby, the change of the internal pressure of the puncture device 10 is prevented, and therefore it is possible to reliably prevent blood from being discharged (for example, leakage or scattering) from the needle tip 12.

  Further, as described above, when the inner cylinder 3 moves from the first position (state shown in FIG. 2) to the second position (state shown in FIG. 3), the holding pieces 22a and 22b hold the tube 17 therebetween. To do. For this reason, the protector 1 is fixed to the puncture device 10. Accordingly, when the inner cylinder 3 is located at the second position, the inner cylinder 3 can reliably cover the hollow needle 11 (needle tip 12).

  When the inner cylinder 3 is moved from the first position to the second position, the distal ends 222 of the holding pieces 22a and 22b are brought into contact with the proximal end surface (positioning portion) 131 of the hub 13 of the puncture device 10, respectively. (See FIG. 10), the inner cylinder 3 is moved. When the distal ends 222 of the sandwiching pieces 22 a and 22 b are brought into contact with the proximal end surface 131 of the hub 13 of the puncture device 10, the protector 1 is positioned with respect to the puncture device 10. In this state (positioning state), when the inner cylinder 3 is positioned from the first position to the second position, the inner cylinder 3 positioned at the second position covers the hollow needle 11 (needle tip 12) more reliably. be able to. In this way, in the protector 1, the tips 222 of the sandwiching pieces 22 a and 22 b abut on the hub 13 of the puncture device 10 and function as positioning portions (contact portions) for positioning the protector 1 with respect to the puncture device 10. .

  Although it does not specifically limit as a constituent material of the outer cylinder 2, For example, various resin materials, such as polyolefin, such as polyethylene, a polypropylene, an ethylene-vinyl acetate copolymer, a polycarbonate, are mentioned.

  An inner cylinder 3 is disposed inside the outer cylinder 2. Similar to the outer cylinder 2, the inner cylinder 3 is formed of a cylindrical body having a substantially square cross-sectional shape and open at both ends, that is, having a distal end opening 34 and a proximal end opening 35. In this way, the inner cylinder 3 has the same cross-sectional shape as the outer cylinder 2, so that the rotation of the inner cylinder 3 with respect to the outer cylinder 2 is restricted. Thereby, it is possible to reliably prevent the operation piece 31 formed in the inner cylinder 3 from coming out of the guide groove 21 formed in the outer cylinder 2. Therefore, the moving operation of the operation piece 31 along the guide groove 21 can be reliably performed. Further, the inner diameter of the inner cylinder 3 is set sufficiently larger than the outer diameter of the hub 13 of the puncture device 10.

  As shown in FIGS. 11 to 13, a slit 36 is formed in the proximal end portion of the inner cylinder 3 so that a part of the tube wall is lost in an L shape, for example. The portion surrounded by the slit 36 is bent or bent as desired, thereby causing the operation piece 31 protruding relative to the outer peripheral portion of the inner cylinder 3 and the curved urging portion 32 for urging the operation piece 31. And can be formed. As described above, each of the operation piece 31 and the biasing portion 32 uses a part of the inner cylinder 3. Thereby, providing the operation piece 31 and the urging | biasing part 32 with a separate member, respectively is abbreviate | omitted, Therefore, the structure of the protector 1 can be made simple. In the protector 1, operating means for operating the inner cylinder 3 to move between the first position and the second position by the guide groove 21 formed in the outer cylinder 2, the operation piece 31, and the urging portion 32. Is configured.

  A large number of minute irregularities are formed on the edge 311 of the operation piece 31 (for example, FIGS. 5 and 13). When operating the operation piece 31 by placing a finger on the edge 311 of the operation piece 31, the finger is reliably prevented from slipping (sliding) from the edge 311. Therefore, the operation can be reliably performed. .

  Further, in order to insert the disassembled inner cylinder 3 into the outer cylinder 2 and put the inner cylinder 3 and the outer cylinder 2 into an assembled state, the operation piece 31 is pressed against the urging force of the urging portion 32. Thus, the inner cylinder 3 is not projected from the outer periphery. When the inner cylinder 3 is inserted into the outer cylinder 2 in this state, an assembled state is obtained.

  As shown in FIG. 2, when the inner cylinder 3 is in the first position in the positioning state, the operation piece 31 enters the base end side widened portion 212 of the guide groove 21. Further, the operating piece 31 that has entered the base end side widened portion 212 is moved by the biasing portion 32 to one side of a pair of wall portions that oppose the operating piece 31 in the width direction of the guide groove 21 (in FIGS. 2 and 5). Is on the left side). As a result, the operation piece 31 reliably contacts (engages) with the stepped portion 214, and thus the movement of the inner cylinder 3 in the distal direction is more reliably regulated. As a result, as described above, the inner cylinder 3 in the first position is prevented from being inadvertently positioned in the second position.

  When the inner cylinder 3 is in the first position, the needle tip 12 is exposed in a state where the protector 1 is separated from the hub 13 (state shown in FIG. 1) and a positioning state (state shown in FIG. 2). In the present embodiment, puncturing with the puncture device 10 is performed in the state shown in FIG.

  From the state shown in FIG. 2, the operation piece 31 is pressed toward the narrow width portion 213 against the biasing force of the biasing portion 32. Thereby, the engagement between the operation piece 31 and the stepped portion 214 is released. In this state, the operation piece 31 can be moved and operated along the narrow portion 213 in the distal direction. Thereby, the inner cylinder 3 can be reliably moved to the 2nd position.

  In addition, since the inner cylinder 3 is set to have an inner diameter sufficiently larger than the outer diameter of the hub 13 of the puncture device 10, it is prevented from touching the puncture device 10 when moving to the second position. Yes. This reliably prevents the vibration from the moving inner cylinder 3 from being directly transmitted to the puncture device 10, and thus blood adhering to the needle tip 12 when covering the needle tip 12 of the used puncture device 10. Can be reliably prevented from scattering or leaking.

  As shown in FIG. 9, when the operation piece 31 is pressed against the narrow width portion 213 against the urging force of the urging portion 32, the engagement between the operation piece 31 and the stepped portion 214 is released. At this time, the urging portion 32 is curved toward the center side (the holding piece 22a side) of the inner cylinder 3, and the inner peripheral surface (pressing action portion) 321 of the urging portion 32 presses the outer peripheral surface 223 of the holding piece 22a. . Thereby, the space | interval of the clamping piece 22a and the clamping piece 22b becomes narrow, Therefore The tube 17 is clamped and the outer cylinder 2 is fixed to the tube 17.

  Thus, in the protector 1, not only the movement operation of the inner cylinder 3 can be performed by operating the operation piece 31, but also the clamping operation (fixing operation) of the clamping pieces 22a and 22b can be performed. By operating one part in this way, two types of operations can be performed continuously, and thus the protector 1 has excellent operability.

  As shown in FIG. 3, when the inner cylinder 3 is in the second position in the positioning state, the operation piece 31 enters the distal end side widened portion 211 of the guide groove 21. In addition, the operation piece 31 that has entered the distal end side widened portion 211 is urged by the urging portion 32 so that the operation piece 31 faces one side of the pair of wall portions facing the width direction of the guide groove 21 (in FIGS. 3 and 6). (Left side). As a result, the operation piece 31 reliably contacts (engages) with the stepped portion 215, and thus the movement of the inner cylinder 3 in the proximal direction is more reliably regulated. Thereby, as described above, the inner cylinder 3 in the second position is prevented from being inadvertently positioned in the first position.

  Further, the hollow needle 11 (needle tip 12) is covered by the inner cylinder 3 at the second position. This prevents accidents such as accidentally piercing a finger or the like with the needle tip 12, and thus the protector 1 is extremely excellent in terms of hygiene and safety.

  Further, as shown in FIG. 8, when the inner cylinder 3 is located at the second position, the pressing portions that press the tapered portions 221 of the sandwiching pieces 22a and 22b in the direction in which the sandwiching pieces 22a and 22b approach each other. 33. The pressing portion 33 is provided so as to protrude (project) from the inner peripheral portion in the vicinity of the distal end side of the slit 36 of the inner cylinder 3. The pressing portion 33 is provided in a part of the inner peripheral portion of the inner cylinder 3 in the circumferential direction.

  By providing such a pressing portion 33, the tube 17 is held by the holding pieces 22a and 22b, and the holding state is maintained, so that the protector 1 in the positioning state is surely displaced from the puncture device 10. Can be prevented. Thereby, the state in which the inner cylinder 3 covered the hollow needle 11 is reliably maintained.

  Moreover, since the change of the internal pressure of the tube 17 is suppressed by maintaining the clamping state, it is possible to prevent blood from the needle tip 12 from being discharged.

  Further, since the pressing portion 33 is provided, it is possible to reliably prevent the inner cylinder 3 at the second position from moving further in the distal direction and detaching from the outer cylinder 2 (see FIG. 8). ).

  Although it does not specifically limit as a constituent material of the inner cylinder 3, For example, the same constituent material as the outer cylinder 2 can be used.

  Next, an example of how to use the protector 1 will be described with reference to FIGS. Here, a case where blood is collected from a blood donor will be described.

  [1] First, a device in which the protector 1 is attached to the puncture device 10, that is, a puncture needle assembly is prepared.

  At this time, the protector 1 is in the first position where the inner cylinder 3 is accommodated in the outer cylinder 2 and is in a retracted state, that is, separated from the hub 13 of the puncture needle (blood collection needle) 11 and connected to the blood collection bag. The tube 17 is inserted. A cap is attached to the hollow needle 11 of the puncture needle 10.

  [2] Next, the cap is removed from the hollow needle 11 to obtain the state shown in FIG. In this state, blood is collected by puncturing a hollow needle 11 in the blood vessel of the blood donor.

  [3] After blood collection is completed, the protector 1 is moved to the vicinity of the hub 13 of the puncture needle 10 to obtain the positioning state shown in FIG. 2, and then the hollow needle 11 is removed from the blood vessel of the blood donor.

  [4] Next, the operation piece 31 of the protector 1 is operated to press the operation piece 31 positioned on the proximal-side widened portion 212 of the guide groove 21 to release the engagement with the stepped portion 214. The piece 31 is moved in the distal direction along the narrow portion 213 and engaged with the step portion 215 of the distal end wide portion 211.

  Thereby, the protector 1 moves to the 2nd position where the inner cylinder 3 protruded from the outer cylinder 2, and the needle tip 12 of the hollow needle 11 is covered with the inner cylinder 3 (refer FIG. 3).

  Along with this, the pair of sandwiching pieces 22a and 22b are pressed toward each other by the pressing portion 33 of the inner cylinder 3, and the tube 17 is sandwiched by the pair of sandwiching pieces 22a and 22b.

  [5] Next, the puncture needle assembly is separated from the blood collection bag by fusing and cutting a predetermined portion of the tube 17 using a tube sealer or the like. Then, the puncture needle assembly is discarded while the protector 1 is attached to the hollow needle 11.

  The protector of the present invention has been described above with respect to the illustrated embodiment. However, the present invention is not limited to this, and each part constituting the protector is replaced with one having an arbitrary configuration that can exhibit the same function. can do. Moreover, arbitrary components may be added.

  Further, the inner cylinder may have an opening in a part of its tube wall, and a portion of the proximal end side of the needle tip of the hollow needle (needle tube) may be exposed through the opening.

It is a perspective view (a figure showing a state where a protector is separated from a hub and an inner cylinder is in the 1st position) which shows a use state of a protector of the present invention in order. It is a perspective view (a figure showing a state where a protector and a puncture tool are positioned, and an inner cylinder is in the 1st position) which shows a use state of a protector of the present invention in order. It is a perspective view (a figure showing a state where a protector and a puncture tool are positioned, and an inner cylinder is in the 2nd position) which shows a use state of a protector of the present invention in order. FIG. 3 is an enlarged detail view of the vicinity of the tip of the outer cylinder of the protector shown in FIG. 2. FIG. 3 is an enlarged detail view of the vicinity of a proximal end portion of an outer cylinder of the protector shown in FIG. 2. FIG. 4 is an enlarged detail view of the vicinity of the tip of the outer cylinder of the protector shown in FIG. 3. FIG. 4 is an enlarged detail view of the vicinity of the base end portion of the outer cylinder of the protector shown in FIG. 3. It is a longitudinal cross-sectional perspective view of the protector shown in FIG. It is a cross-sectional view of the protector of the present invention. It is a longitudinal cross-sectional perspective view of the outer cylinder of the protector of this invention. It is a perspective view of the inner cylinder of the protector of this invention. FIG. 12 is an enlarged detail view of the vicinity of the base end portion of the inner cylinder shown in FIG. 11. FIG. 12 is an enlarged detail view of the vicinity of the base end portion of the inner cylinder shown in FIG. 11.

Explanation of symbols

1 protector 2 outer cylinder 21 guide groove (operation means)
211 Wide end portion at the distal end 212 Wide end portion at the proximal end 213 Narrow width portion 214, 215 Stepped portion 216 Defect portion (engagement portion)
22a, 22b Clamping piece (fixing means)
221 Tapered portion 222 Tip 223 Outer peripheral surface 23 Tip opening 24 Base end opening 25 Rib 3 Inner cylinder 31 Operation piece (operation means)
311 Edge portion 32 Biasing portion 321 Inner peripheral surface (pressing action portion)
33 Pressing part 34 Front end opening 35 Base end opening 36 Slit 10 Puncture tool 11 Hollow needle (needle tube)
12 Needle tip 13 Hub 131 Base end face (positioning part)
138 Base end 17 tube

Claims (12)

A puncture device comprising a needle tube having a sharp needle tip at the tip, a hub installed on the proximal end side of the needle tube, and a tube connected to the proximal end portion of the hub and communicating with the needle tube via the hub A protector used by attaching to
An outer cylinder that is provided movably along the longitudinal direction of the tube and has a fixing means fixed to the puncture device;
An inner cylinder housed inside the outer cylinder and provided to be movable in the longitudinal direction of the outer cylinder;
Operation means for moving the inner cylinder to a first position housed in the outer cylinder and a second position protruding from the first position and projecting from the outer cylinder. ,
When the inner cylinder is in the first position with the outer cylinder fixed to the puncture device, the needle tip is exposed, and when the inner cylinder is in the second position, the inner cylinder The protector is configured to cover the needle tip of the needle tube.   The said operation means has a guide groove formed in the tube wall of the said outer cylinder along the longitudinal direction, and an operation piece formed in the outer peripheral part of the said inner cylinder, and moves along the said guide groove. The protector according to 1. The guide groove has, at its base end portion, a base end side widened portion with an increased width,
The operation means has a biasing portion that biases the operation piece toward one edge of the guide groove,
When the inner cylinder is located at the first position, the operation piece enters the proximal-side widened portion and is biased by the biasing portion, so that a step on the distal end side of the proximal-side widened portion The protector of Claim 2 comprised so that the said 1st position of the said inner cylinder may be hold | maintained by latching to a part. The guide groove has a tip side widened portion whose width is widened at the tip portion,
The operation means has a biasing portion that biases the operation piece toward one edge of the guide groove,
When the inner cylinder is positioned at the second position, the operation piece enters the distal end side widened portion and is biased by the biasing portion, so that the stepped portion on the proximal end side of the distal end side widened portion The protector of Claim 2 or 3 comprised so that the said 2nd position of the said inner cylinder may be hold | maintained by latching to.   The protector according to any one of claims 1 to 4, wherein the fixing means can select a fixed state in which the fixing unit is fixed to the puncture tool and a released state in which the fixed state is released.   The operation means is configured to actuate the fixing means from the released state to the fixed state as the inner cylinder is moved from the first position to the second position. The protector according to claim 5.   The protector according to claim 1, wherein the fixing means is configured to be fixed to the tube.   The protector according to claim 7, wherein the fixing means is provided on the inner side of the outer cylinder, and includes a plurality of clamping pieces that clamp the tube and fix the outer cylinder to the tube.   9. The protector according to claim 8, wherein each of the sandwiching pieces has a long shape in which one end portion is supported by a proximal end portion of the outer cylinder and the other end portion extends to a distal end side of the outer cylinder.   The protector according to claim 8 or 9, wherein a tip of each clamping piece abuts on the hub and functions as a positioning unit that positions the protector with respect to the puncture device.   The said operation means has a press action part which presses one of the said pair of clamping pieces toward the other when moving the inner cylinder from the first position to the second position. The protector in any one of thru | or 10.   The said inner cylinder is provided in the inner peripheral part, and when it is located in the said 2nd position, it has a press part which presses each said clamping piece in the mutually approaching direction. Protector.

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