JP5144339B2 - Needle safety device and intravenous catheter device - Google Patents

Description

  The present invention relates to a protection device for a needle tip of an intravenous catheter. In particular, the present invention relates to a needle safety device that automatically covers a needle when the needle is withdrawn from a patient to prevent accidental contact with a medical professional.

Medical professionals encounter many occupational risks when administering treatment to patients. One serious risk is the accidental needle stick after the needle is removed from the intravenous catheter. Since the needle tip easily penetrates latex gloves used by medical professionals, it is particularly dangerous that the needle accidentally pierces the medical professional's skin. Concerns about accidental bites are particularly pronounced for blood-borne diseases such as hepatitis or AIDS. Conventional needle tip protectors have been manufactured with the understanding of the need to cover the needle tip when the needle tip is withdrawn from the catheter. In the prior art, after the needle has been withdrawn from the catheter, the protection device for the needle tip is placed on the needle, but it is difficult to assemble. Further, the conventional technology uses a wing housing with an inappropriate taper that requires an unnecessarily large width, adopts a complicated structure, and has some other disadvantages. These disadvantages become clear by referring to Patent Document 1 and Patent Document 2.
US Pat. No. 5,135,504 (McLees) US Pat. No. 6,117,108 (Woehr)

  Accordingly, the main object of the present invention is to provide a needle safety device that overcomes the disadvantages of the prior art.

  Another object of the present invention is to provide an intravenous catheter device that uses a cylindrical and non-tapered wing housing cylinder, thereby reducing the overall size of the intravenous catheter device.

  Another object of the present invention is to provide a needle safety device that is simple in shape and inexpensive to manufacture and use.

  The above object is met by the content of the independent claims.

  The needle safety device of the present invention comprises a base capable of receiving a needle and two opposing jaws attached to the base on which the needle can act. Together, the two opposing jaws form a reverse collet mechanism. The jaw is movable between an expanded position that effectively increases the outer diameter of the jaw when the needle is between the jaws and a retracted position when the needle is not between the jaws. The jaw of the needle safety device allows relative movement of the needle with the base when the jaw is expanded. As the needle slides through the space between the jaws, the jaws close around the needle tip. The jaw prevents relative movement of the needle with the base when the jaw is contracted.

  Needle safety devices are used in intravenous catheter devices that include a flexible catheter attached to a wing housing. Intravenous catheter devices include an inner obstruction within the wing housing. A needle with a needle tip is provided in the flexible catheter of the wing housing. As described above, the extended position where the jaw is moved outwards by the needle and prevented from moving by the inner obstacle, and the needle safety device passes the obstacle while the jaw receives the needle tip. The jaws of the needle safety device are movable between a retracted position when closing the periphery of the needle tip so as to allow movement.

  According to another feature of the invention, the needle safety device is adapted to allow movement of the needle safety device past an obstruction of the intravenous catheter device when in the expanded position during assembly. Is provided. The most common obstacle is an annular ring in the wing housing.

  According to another feature of the present invention, the jaws have a side perpendicular to the cylindrical side of the wing housing that prevents movement after passing through an obstacle in the intravenous catheter device while the needle safety device is in the expanded position. Prepare.

  According to another feature of the invention, the jaws are connected to each other by at least one link at a distance from the base. The at least one link prevents the two jaws from moving apart, which can cause permanent damage to the needle safety device. The link may be provided only on one side of the jaw. Alternatively, the first link and the second link may be provided on both sides of the jaw. Preferably, the at least one link is formed with spring-like properties so that the jaws can expand against the restoring force of the link. The link is designed to retain spring-like characteristics over a period of shelf live. For example, the link may comprise a curved shape such as “S” or “Z”. Alternatively, the link may have a substantially straight shape. In order to make the needle safety device a simple and economical product, the base, jaws and preferably at least one link may be integrally molded, preferably plastic material, for example by injection molding It may be formed from. Alternatively, the base, jaws, and preferably at least one link may be molded from a metallic material.

  According to another feature of the invention, the needle safety device is capable of receiving a 14-18 gauge needle.

  According to another feature of the invention, the needle safety device is capable of receiving 18-24 gauge needles.

  According to another feature of the invention, the intravenous catheter device comprises a cylindrical wing housing. The needle safety device fits effectively within a cylindrical wing housing.

  According to another feature of the invention, the needle safety device is held in place within the needle hub chamber.

  According to yet another feature of the invention, the needle safety device is positioned against the catheter base.

  Referring to FIG. 1, an intravenous (IV) catheter device 10 of the present invention is shown. The intravenous catheter device 10 is shown as a finished product before use, and is attached to the needle cover 12, the wing housing 14, the port cap 16 that forms an assembly integrated with the wing housing 14, and the wing housing 14. Needle hub 18.

  As seen in the cross-sectional view shown in FIG. 2, the needle 20 extends from the needle hub 18 through the wing housing and terminates at the needle tip 22 in the needle cover 12.

  The needle 20 is hollow, and the needle tip 22 is generally cut obliquely. When the needle tip 22 is inserted into a patient, the needle receives fluid pressure that passes through the needle tip 22 and the needle 20 and flows into the flashback chamber 24.

  A catheter 26 attached to the wing housing 14 by the catheter base 28 is located around the needle. The catheter 26 is a flexible tube that remains in the user to administer liquids, nutrients, or medications.

  FIG. 3 is an enlarged view of the needle safety device 40 of FIG. Needle hub 18 includes an abutment chamber 30 that is used to hold needle safety device 40 in place within wing housing 14. The wing housing 14 includes a wing housing chamber 32 in which a needle safety device is disposed. An obstacle 34 that interacts with the needle safety device 40 is located in the wing housing chamber 32. In the illustrated embodiment, the obstacle 34 is an annular ring.

  The catheter base extends into the wing housing and contacts the needle safety device 40. As shown, the needle safety device 40 is firmly held in place within the abutment chamber 30 by the abutment chamber 30 and the catheter base 28.

  Needle safety device 40 includes a base 42 having a needle passage 44 therein. Needle safety device 40 includes a reverse collet 46 that is used to expand to contact obstruction 34 and to contract to avoid obstruction 34.

  The reverse collet includes two jaws 48 that are movable to an extended position that effectively increases the outer diameter of the jaws when the needle 20 is between the jaws 48. The jaw moves from the expanded position to the retracted position when the needle 20 is not between the jaws 48. The jaw 48 interacts with the obstacle 34 to allow relative movement of the needle 20 with the base 42 of the needle safety device 40. As seen in the forward movement in FIGS. 2, 5, 7 and 10, the jaws 48 allow this relative movement when in the expanded position.

  As the needle 20 passes through the jaw 48, the periphery of the needle tip 22 is closed while preventing accidental contact of the needle tip 22 by a medical professional. The jaw 48 prevents relative movement of the needle 20 together with the base 42 of the needle safety device 40 with the periphery of the needle tip closed. This is because the jaw 48 slides through the obstacle 34 without the obstacle 34 catching the needle safety device 40. The needle safety device 40 needs to be held in place by an obstacle so that the needle 20 moves relative to the needle safety device 40. The needle passage 44 of the needle safety device 40 has a coefficient of friction that grips the needle 20 when the needle safety device 40 is not held in place by the obstacle 34.

  As can be seen in the enlarged views 3, 3 </ b> A, 8, 8 </ b> A, the jaw 48 includes an inclined portion 50. During assembly, a needle safety device 40 is generally positioned on the needle 20 to attach the end to the needle hub 18 and then attach the end within the needle hub 18. Therefore, the needle safety device 40 is expanded before being placed in the wing housing 14. The needle safety device 40 is inserted into the wing housing and contacts the obstruction 34 when the needle is placed in the catheter. The inclined portion 50 gradually passes through the obstacle 34 and then gets on the obstacle, giving a good feeling to the assembling worker. The side portion 52 on the opposite side of the inclined portion 50 prevents the needle safety device 40 from moving backward after passing through the obstacle 34 and moving to a predetermined position.

  The jaws 48 are connected to each other by at least one link 49 located in the region between the base 42 and the ramp 50 (FIGS. 13 and 13A). The link may be provided only on one side of the jaw 48. Alternatively, the first link and the second link may be provided on both sides of the jaw 48. At least one link is formed with spring-like properties so that the jaws 48 can expand against the restoring force of the link. For example, the link may have a curved shape such as “S” or “Z”. Alternatively, the link may have a substantially straight shape.

  Base 42, jaw 48, and preferably at least one link, may be integrally formed, and may preferably be formed from a plastic material, for example, by injection molding. Alternatively, the base 42, the jaws 48, and preferably at least one link may be formed from a metallic material.

  A reverse taper 54 is provided on the jaw 48. The reverse taper 54 engages the needle tip 22 to allow the needle tip 22 to move past the reverse taper 54. As can be seen by comparing FIGS. 3 and 3A, the reverse taper 54 may be located on one or both of the jaws 48.

  As can be seen in FIGS. 9 and 10, the needle safety device 40 utilizes a flared needle 23 and a tension ring 53 in order to keep the needle safety device 40 protected from the needle tip 22. To do. Needle 20 includes a flared portion located near the needle tip so that the diameter effectively increases at a particular location. The flare 23 is formed during assembly after the needle safety device 40 is placed on the needle 20 attached to the needle hub 18. The flared portion 23 ensures that the needle tip 22 does not protrude from the needle safety device 40 after it is confined within the needle safety device 40. Further, a tension ring 53 is provided on the jaw that contracts when the needle tip 22 passes the front of the jaw 48 when the needle 20 is pulled out of the catheter 26 after use.

  In use, a medical professional receives an intravenous catheter device with a protective needle cover 12 as seen in FIGS. 1 and 2, and the needle 20 and catheter 26 are inserted into the patient's vein. Thereafter, as seen in FIGS. 4 and 5, the needle is withdrawn from the patient by grasping the wing housing 14 and pulling the needle hub 18. Needle 20 slides through catheter 26 and needle safety device 40.

  The needle tip 22 passes through the jaw 48 so that the jaw can contract in the neutral position. Alternatively, the tension ring 53 of the jaw 48 may force the jaw 48 to contract. In the neutral position of the chin, the chin can pass through the obstacle 34 of the wing housing 14. Alternatively, a needle safety device 40, such as in FIGS. 8 and 8A, may make slight contact with the obstruction 34, but is formed from a flexible material and is not limited by the metal syringe 22. It is possible for 48 to contract slightly in order to pass through the obstacle 34. In this case, the needle passage 44 of the base 42 fully grasps the needle 20 and the jaw 48 passes through the obstacle 34. Alternatively, the flared portion 23 as shown in FIG. 9 does not pass through the needle passage 44 and allows the jaw 48 to pass through the obstacle 34.

  As seen in FIGS. 9 and 10, the medical professional completely removes the needle safety device that has passed through the wing housing 14 for disposal. This device prevents medical professionals from being accidentally stabbed by the needle tip 22.

  By shaping the posterior portion of the base 42 that fits within the needle hub of the abutment chamber 30, the needle safety device 40 can be assembled as seen in FIG. 1 without activating and functioning the intravenous catheter device 10. Stay in position. When the base 42 is in the abutment chamber 30, the jaw is always in contact with the needle 20 to ensure that the needle 20 moves properly between the jaws 48 and the needle safety device 40 functions properly. Guaranteed to be parallel.

  When the needle is in the needle safety device 40, the needle tip does not protrude when pressed against a medical professional, a work surface or other object. When the needle safety device is in place, the needle 20 is safe to dispose of.

It is a top view of an intravenous catheter apparatus. FIG. 2 is a cross-sectional view of the apparatus of FIG. 1 taken along line 2-2. FIG. 3 is an enlarged view of a cross section 3 in FIG. 2. FIG. 4 shows an alternative embodiment of the needle safety device of FIG. FIG. 4 is a plan view of an intravenous catheter device with a needle partially removed from the catheter and wing housing. FIG. 5 is a cross-sectional view of FIG. 4 taken along line 5-5. It is a top view of the intravenous catheter apparatus by which the needle was extracted from the catheter and this needle was taken out from between the needle safety devices. FIG. 7 is a cross-sectional view taken along line 7-7 of FIG. It is an enlarged view of the cross section 8 of FIG. FIG. 9 shows an alternative embodiment of the needle safety device of FIG. FIG. 10 is an enlarged cross-sectional view of an alternative embodiment of a needle safety device with a jaw in an open position and comprising a flared needle and a tension ring. FIG. 10 shows the needle safety device of FIG. 9 with the jaws in the closed position. FIG. 3 is a plan view of an intravenous catheter device with a needle withdrawn from the catheter and wing housing. FIG. 11 is a cross-sectional view taken along line 9-9 of FIG. FIG. 9 shows the needle safety device of FIG. 8 with a link connected to the jaw. FIG. 8B shows the needle safety device of FIG. 8A with the link connected to the jaw.

Claims (25)

A needle safety device for an intravenous catheter device,
A base capable of receiving a needle;
Two opposing jaws attached to the base, connected to each other by at least one link at a distance from the base, and on which the needle can act;
With
The jaw is movable between an expanded position that effectively increases the outer diameter of the jaw when the needle passes through the jaw and a contracted position when the needle does not pass through the jaw. And
The jaws allow relative movement of the needle with the base when expanded, close the periphery of the needle tip and prevent relative movement of the needle with the base when contracted ;
A needle safety device, characterized in that the link or each link is formed with spring-like properties so that the jaws can expand against the restoring force of the link .   The needle safety device according to claim 1, wherein the link is provided only on one side of the jaw.   The needle safety device according to claim 1, wherein a first link and a second link are provided on both sides of the jaw. The needle safety device according to claim 1, wherein the link or each link has a curved shape such as “S” or “Z” or a substantially straight shape. The jaws, when the jaws portion is in the expanded position during assembly, according to claim 1, characterized in that it comprises an inclined portion that is adapted to be moved as they pass through the obstruction of the intravenous catheter device Needle safety device as described in. The needle safety device according to claim 1 , wherein the link, that is, each link is provided in a region between the base portion and the inclined portion. The jaws, when the jaws portion is in the expanded position, claim 1, characterized in that it comprises the adapted sides to prevent movement after passing an obstacle in the intravenous catheter device Needle safety device as described in. The needle safety device of claim 1, wherein the base receives a 14-18 gauge needle. The needle safety device of claim 1, wherein the base receives an 18-24 gauge needle. The needle safety of claim 1, wherein the jaw includes a reverse taper adapted to form a barrier against movement of the needle tip after the jaw has moved to a retracted position. apparatus. The needle safety device according to claim 1, wherein the jaw includes a tension ring that forcibly contracts the jaw. An intravenous catheter device,
A flexible catheter attached to the wing housing;
An inner obstacle in the wing housing;
The flexible catheter and a needle in the wing housing;
A needle safety device having a base and jaws through which the needle penetrates;
With
The jaws are connected to each other by at least one link at a fixed distance from the base, and in the needle safety device, the jaws are moved outward by a needle and prevented from moving by the inner obstacle Between a position and a contracted position in which the jaw closes around the needle tip so as to allow the needle safety device to move through the obstacle while accommodating the needle tip. The jaws are movable ;
Intravenous catheter device characterized in that the link or each link is formed with spring-like properties so that the jaws can expand against the restoring force of the link . The intravenous catheter device according to claim 12 , wherein the link is provided only on one side of the jaw. The intravenous catheter device according to claim 12 , wherein a first link and a second link are provided on both sides of the jaw. 13. Intravenous catheter device according to claim 12 , characterized in that the link or each link comprises a curved shape, for example a shape like "S" or "Z", or a substantially straight shape. The intravenous catheter device of claim 12 , wherein the jaw includes a ramp to allow movement of the needle safety device through the obstacle during assembly. The intravenous catheter device according to claim 12 , wherein the link, that is, each link is provided in a region between the base portion and the inclined portion. 13. The intravenous catheter of claim 12 , wherein at least one jaw includes a side that prevents movement of the needle safety device past the obstacle when the jaw is expanded. apparatus. 13. The reverse taper of claim 12 , wherein the at least one jaw includes a reverse taper to form a barrier that prevents the needle tip from projecting out of the needle safety device and accidentally moving. Intravenous catheter device. The intravenous catheter device according to claim 12 , wherein the jaw includes a tension ring that contracts the jaw. A needle hub attached to the needle; and a contact chamber in the needle hub, the needle safety device being fitted in the contact chamber to align the needle safety device with the needle. The intravenous catheter device according to claim 12 . Further comprising a catheter base within the wing housing, according to claim 12, jaws of the needle safety device to secure the needle safety device to move within the wing housing and wherein the abutting the catheter base Intravenous catheter device. The intravenous catheter device according to claim 12 , wherein the obstacle is an annular ring. The intravenous catheter device of claim 12 , wherein the wing housing comprises a generally cylindrical tube through which the needle and the needle safety device move. The intravenous catheter device according to claim 12 , wherein the needle has a flared tip.

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