Conduit system
By introducing strain relief ribs and protrusions into the catheter system, the risk of needle puncture during guide pin removal of the PIVC assembly is resolved, enabling safe and convenient needle cap fixation and removal, and reducing needle puncture injuries.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- BECTON DICKINSON & CO
- Filing Date
- 2021-06-09
- Publication Date
- 2026-06-02
AI Technical Summary
Existing peripheral intravenous catheter (PIVC) assemblies pose a risk of needlestick injury when removing the guide needle, especially when clinicians use excessive force.
A catheter system was designed, including a catheter assembly and a needle assembly. The system utilizes strain to eliminate ribs and protrusions, and reduces the contact area between the needle cap and the catheter assembly through interference fit or friction fit, thereby making the needle cap easy to fix and remove and reducing the risk of needle puncture.
By reducing the contact area between the needle cap and the catheter assembly, the risk of needle prick for clinicians when removing the guide needle is reduced, improving the safety and convenience of the procedure.
Smart Images
Figure CN113769229B_ABST
Abstract
Description
Technical Field
[0001] This disclosure generally relates to the technical field of medical devices. More specifically, this disclosure relates to a catheter system. Background Technology
[0002] Catheters are commonly used in a variety of infusion therapies. For example, catheters can be used to deliver fluids (such as saline solutions, various medications, and total parenteral nutrition) into a patient. Catheters can also be used to draw blood from a patient.
[0003] A common type of catheter is the needle-type peripheral intravenous catheter (“PIVC”). As the name suggests, a needle-type PIVC is mounted on a guide needle with a sharp distal tip. The PIVC and guide needle are assembled such that the distal tip of the guide needle extends beyond the distal tip of the PIVC, and the bevel of the needle faces upwards away from the patient's skin. The PIVC and guide needle are typically inserted into the patient's vascular system through the skin at a shallow angle.
[0004] To verify proper placement of the guide needle and / or PIVC in the blood vessel, clinicians typically confirm the presence of a "flashback" of blood in the flashback lumen of the PIVC assembly. Once needle placement is confirmed, clinicians can temporarily occlude blood flow in the vascular system and remove the guide needle, leaving the PIVC in place for future blood draws and / or infusions. The PIVC assembly can be connected to an extension device, which allows for the connection of infusion or blood draw devices at the site where the PIVC has been removed from its insertion site.
[0005] There is a risk of accidental needlestick injury if the distal tip of the guide needle is not properly secured in the needle cap or shield. However, removing the secured needle cap from the PIVC catheter assembly can pose a needlestick threat to the clinician if the clinician uses excessive force to remove it. This disclosure provides systems and methods that significantly limit and / or prevent needlestick injuries. The subject matter claimed herein is not limited to embodiments that address any drawbacks or operate only in environments such as those described above. Rather, this background is provided merely to illustrate an example technical field in which some of the embodiments described herein can be practiced. Summary of the Invention
[0006] This disclosure generally relates to vascular access devices and related systems and methods. In some embodiments, the catheter system may include a catheter assembly and a needle assembly connected to the catheter assembly. In some embodiments, the needle assembly may include a needle hub and a guide needle. In some embodiments, the proximal end of the guide needle may be secured within the needle hub.
[0007] In some embodiments, the catheter assembly may include a catheter adapter, which may include a body and a nasal portion extending distally from the body. In some embodiments, the catheter assembly may include a catheter secured within the catheter adapter and extending distally beyond the nasal portion. In some embodiments, the catheter may include a peripheral intravenous catheter (PIVC), a midline catheter, or a peripherally inserted central catheter.
[0008] In some embodiments, a guide needle may extend through the catheter. In some embodiments, in response to insertion of the guide needle and / or catheter into the patient's vascular system, the guide needle may be withdrawn proximally from the catheter and removed from the catheter assembly. In some embodiments, the catheter may remain within the patient's vascular system for blood draws and / or fluid infusions.
[0009] In some embodiments, the nose portion may be generally cylindrical. In some embodiments, the nose portion may be made of a rigid or semi-rigid material. In some embodiments, strain-relieving ribs may be provided on the nose portion. In some embodiments, the strain-relieving ribs may be generally aligned with the longitudinal axis of the catheter system. In some embodiments, a protrusion and / or another protrusion may be provided on the strain-relieving rib.
[0010] In some embodiments, the strain-relieving rib may be made of a compliant or flexible material. In some embodiments, the protrusion and / or other protrusions may be made of a flexible material or other suitable flexible material. In some embodiments, the distal end of the nose may include a strain-relieving element that at least partially surrounds the conduit and is made of a flexible material or other suitable flexible material. In some embodiments, the flexible material may include an elastomer, such as a thermoplastic elastomer or other suitable elastomer. In some embodiments, one or more of the following may be integrally formed as a single unit: a strain-relieving rib, a protrusion, another protrusion, and a strain-relieving element.
[0011] In some embodiments, the protrusion may be aligned with another protrusion. In some embodiments, the protrusion may be distal to another protrusion. In some embodiments, the distal end of the protrusion may include a first side and a second side. In some embodiments, the first and second sides may be close to the strain-relieving rib. In some embodiments, the first and second sides may be angled toward each other such that the distal end of the protrusion tapers in the distal direction, which may facilitate the introduction or smooth movement of the needle cap relative to the catheter assembly.
[0012] In some embodiments, the distal end of the protrusion may taper distally toward the central axis of the protrusion, which may be aligned with the longitudinal axis of the catheter system. In some embodiments, the height of the distal end of the protrusion may decrease distally. In some embodiments, one or more of the following may be provided on the bottom of the catheter assembly: a strain relief rib, a protrusion, and another protrusion. In some embodiments, the bevel of the guide needle may face upwards and away from the bottom of the catheter assembly, the bottom of the catheter assembly facing the patient's skin.
[0013] In some embodiments, the needle cap may be removably coupled to the catheter assembly. In some embodiments, the needle cap may be placed on the catheter assembly during catheter system assembly and removed from the catheter system before the catheter system is inserted into the patient's vasculature. In some embodiments, the inner surface of the needle cap and / or the outer surface of the catheter assembly may facilitate securing the needle cap to and / or removing the needle cap from the catheter assembly using a small force provided by a clinician or manufacturer. More specifically, in some embodiments, when the needle cap is removably coupled to the catheter assembly, the inner surface of the needle cap and / or the outer surface of the catheter assembly may reduce the surface area of contact between the needle cap and the catheter assembly. For example, the inner surface of the needle cap may be ribbed. Additionally or alternatively, in some embodiments, the catheter assembly may include a protrusion and / or another protrusion.
[0014] In some embodiments, the needle cap may be removably coupled to the catheter assembly via an interference fit or a friction fit. In some embodiments, the inner surface of the needle cap may contact one or more of the following in a friction fit: a portion of the nose, a protrusion, and another protrusion. In some embodiments, the needle cap may be tubular, having a closed or open proximal end.
[0015] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory, and not intended to limit the claimed invention. It should be understood that the various embodiments are not limited to the arrangements and means shown in the drawings. It should also be understood that embodiments may be combined, or other embodiments may be utilized, and structural changes may be made without departing from the scope of the various embodiments of the invention, unless so required. Therefore, the following detailed description should not be considered limiting. Attached Figure Description
[0016] Exemplary embodiments will be described and explained with additional features and details using the accompanying drawings, wherein:
[0017] Figure 1A This is a top perspective view of an example catheter system according to some embodiments;
[0018] Figure 1B This is an enlarged upper perspective view of the distal portion of a catheter system according to some embodiments;
[0019] Figure 2A This is an example top perspective view of a needle cap according to some embodiments;
[0020] Figure 2B This is an enlarged upper perspective view of the proximal end of the needle cap according to some embodiments;
[0021] Figure 2C This is a cross-sectional view of the needle cap according to some embodiments;
[0022] Figure 3A This is a lower perspective view of a portion of an example catheter assembly of a catheter system according to some embodiments, showing the needle cap removed and an example protrusion;
[0023] Figure 3B This is an enlarged lower perspective view of a portion of a catheter assembly of a catheter system according to some embodiments, showing the needle cap removed and protruding;
[0024] Figure 3C This is a lower perspective view of a catheter system according to some embodiments, showing a protrusion;
[0025] Figure 3D It is according to some embodiments along Figure 3C A 3D-3D cross-sectional view of a conduit system;
[0026] Figure 4A This is a lower perspective view of a catheter assembly according to some embodiments, showing the needle cap removed and an exemplary protrusion;
[0027] Figure 4B This is an enlarged lower perspective view of a portion of a catheter assembly according to some embodiments of a catheter system, showing the needle cap removed and another protrusion;
[0028] Figure 4C This is a lower perspective view of a catheter system according to some embodiments, showing another protrusion; and
[0029] Figure 4D It is according to some embodiments along Figure 4C A 4D-4D sectional view of a conduit system. Detailed Implementation
[0030] Now for reference Figure 1A-1B In some embodiments, the catheter system 10 may include a catheter assembly 12 and a needle assembly 14 connected to the catheter assembly 12. In some embodiments, the needle assembly 14 may include a needle hub 16 and a guide needle 18. In some embodiments, the proximal end of the guide needle 18 may be secured within the needle hub 16. In some embodiments, the guide needle 18 may include a sharp distal tip.
[0031] In some embodiments, catheter assembly 12 may include catheter adapter 20, which may include a body 22 and a nasal portion 24 extending distally from the body 22. In some embodiments, catheter assembly 12 may include a catheter 26 secured within catheter adapter 20 and extending distally beyond the nasal portion 24. In some embodiments, catheter 26 may include a peripheral intravenous catheter (PIVC), a midline catheter, or a peripherally inserted central catheter.
[0032] In some embodiments, the guide needle 18 may extend through the catheter 26. In some embodiments, in response to the insertion of the guide needle 18 and / or the catheter 26 into the patient's vascular system, the guide needle 18 may be withdrawn proximally from the catheter 26 and removed from the catheter assembly 12. In some embodiments, the catheter 26 may remain in the patient's vascular system for blood draws and / or fluid infusions.
[0033] In some embodiments, the nose portion 24 may be cylindrical or generally cylindrical. In some embodiments, the nose portion 24 may be made of a rigid or semi-rigid material. In some embodiments, the distal end of the nose portion 24 may be coupled to a strain relief element 28, which at least partially surrounds the conduit 26 and is made of a compliant or flexible material. In some embodiments, the flexible material may include an elastomer, such as a thermoplastic elastomer or other suitable elastomer. In some embodiments, the strain relief element 28 may extend distally from the nose portion 24 and form the distal end portion of the conduit adapter 12.
[0034] In some embodiments, the needle cap 30 may be removably coupled to the catheter assembly 12. In some embodiments, the needle cap 30 may be removably coupled to the catheter assembly 12 by interference fit or friction fit. In some embodiments, the needle cap 30 may be placed on the catheter assembly 12 during the assembly of the catheter system 10 and removed from the catheter system 10 before the catheter system 10 is inserted into the patient's vasculature. In some embodiments, the needle cap 30 may extend around the nose 24.
[0035] Now for reference Figure 2A-2C In some embodiments, the inner surface 31 of the needle cap 30 may facilitate the use of a clinician or manufacturer to secure the needle cap 30 to the catheter assembly 12 with minimal force (see [link to documentation]). Figure 1A , 3A(or 4A, or as an example) and / or remove the needle cap 30 from the catheter assembly 12. More specifically, in some embodiments, the inner surface 31 of the needle cap 30 may include a plurality of ribs 32 that may reduce the surface area of the needle cap 30 in contact with a portion of the catheter assembly 12 (e.g., the nose 24). In some embodiments, when the needle cap 30 is secured to the catheter assembly 12, the ribs 32 may contact said portion of the catheter assembly 12, but a plurality of portions of the inner surface 31 between the ribs 32 may not contact said portion of the catheter assembly 12.
[0036] In some embodiments, the needle cap 30 may be generally tubular. In some embodiments, the proximal end 33 of the needle cap 30 may be closed, for example, as shown in the figure. Figure 2C As shown, this can provide protection against the sharp distal tip of the guide pin 18. In other embodiments, the proximal end 33 of the pin cap 30 can be opened.
[0037] Now for reference Figures 3A-3D In some embodiments, strain relief ribs 34 may be provided on the nose portion 24. In some embodiments, multiple strain relief ribs may be provided on the nose portion 24. In some embodiments, the strain relief ribs may be substantially aligned with the longitudinal axis 35 of the catheter system 10.
[0038] In some embodiments, the strain relief rib 34 may be made of a flexible material. In some embodiments, the distal end of the nose 24 may be coupled to a strain relief element 28 that at least partially surrounds the conduit 26 and is made of a flexible material or other suitable flexible material.
[0039] In some embodiments, the protrusion 36 may be disposed on the strain-relieving rib 34. In some embodiments, the protrusion 36 may be made of a flexible material or other suitable flexible material. In some embodiments, the distal end of the protrusion 36 may include a first side 38a and a second side 38b. In some embodiments, the first side 38a and the second side 38b may be close to the strain-relieving rib 34. In some embodiments, the first side 38a and the second side 38b may be angled toward each other such that the distal end 36 of the protrusion tapers in the distal direction, which may facilitate the introduction or smooth movement of the needle cap 30 relative to the catheter assembly 12.
[0040] In some embodiments, the distal end of the protrusion 36 may taper toward the central axis of the protrusion 36 in the distal direction, which may be aligned with the longitudinal axis 35 of the catheter system 10. In some embodiments, the height 37 of the distal end of the protrusion 36 may decrease in the distal direction.
[0041] In some embodiments, the protrusion 36 may contact one or more ribs 32 of the needle cap 30, thereby reducing the surface area of the needle cap 30 in contact with the catheter assembly 12.
[0042] Now for reference Figures 4A-4D In some embodiments, protrusion 36 and / or another protrusion 40 may be provided on strain-relieving rib 34. In some embodiments, protrusion 36 and / or another protrusion 40 may be made of a flexible material or other suitable flexible material. In some embodiments, one or more of the following may be integrally formed as a single unit: strain-relieving rib 34, protrusion 36, another protrusion 40, and strain-relieving element.
[0043] In some embodiments, protrusion 36 may be aligned with another protrusion 40. In some embodiments, protrusion 36 may be distal to another protrusion 40. In some embodiments, one or more of the following may be disposed at the bottom of catheter assembly 12: strain relief rib 34, protrusion 36, and another protrusion 40. In some embodiments, the bevel of guide needle 18 may face upward and away from the bottom of catheter assembly 12, the bottom of catheter assembly 12 being adjacent to the patient's facial skin.
[0044] In some embodiments, the outer surface of the catheter assembly 12 may facilitate the attachment and / or removal of the needle cap 30 to the catheter assembly 12 by a clinician or manufacturer with minimal force. More specifically, in some embodiments, when the needle cap 30 is removably attached to the catheter assembly 12, the outer surface of the catheter assembly 12 may reduce the surface area of contact between the needle cap 30 and the catheter assembly 12. For example, the catheter assembly may include a protrusion 36 and / or another protrusion 40. In some embodiments, the inner surface 31 of the needle cap 30 may frictionally contact one or more of the following: a portion of the nose 24, the protrusion 36, and the other protrusion 40. In some embodiments, the portion of the nose 24 contacted by the inner surface 31 may be the lower or bottom portion of the nose 24, which may be opposite the protrusion 36 and / or the other protrusion 40.
[0045] All examples and conditional language cited herein are intended for pedagogical purposes to aid the reader's understanding of the invention and the concepts contributed by the inventors to further the development of the art, and should be construed as not being limited to these specifically cited examples and conditions. Although embodiments of the invention have been described in detail, it should be understood that various changes, substitutions, and modifications can be made thereto without departing from the spirit and scope of the invention.
Claims
1. A catheter system, characterized in that, The catheter system includes: A catheter, which is fixed within a catheter adapter and extends distally beyond the generally cylindrical nose; The catheter adapter includes: ontology; The generally cylindrical nose portion extending distally from the body, the nose portion including a distal end and a proximal end, wherein the generally cylindrical nose portion is made of a first material; A strain relief rib extends outward from the generally cylindrical nose portion and along a length between the distal end and the proximal end of the generally cylindrical nose portion, wherein the strain relief rib is made of a second material, the first material being a rigid or semi-rigid material and the second material being a flexible material, wherein the strain relief rib only partially surrounds the conduit, wherein the strain relief rib includes a distal end and a proximal end, and wherein the width of the proximal end of the strain relief rib is smaller than the width of the generally cylindrical nose portion; A protrusion disposed on the strain-relieving rib and extending outward from the strain-relieving rib; and Another protrusion, which is aligned with the first protrusion along the longitudinal axis of the conduit system and extends outward from the strain relief rib, wherein the first protrusion and the second protrusion are made of the second material.
2. The catheter system as claimed in claim 1, characterized in that, The strain relief rib, the protrusion, and the other protrusion are integrally formed as a single unit.
3. The catheter system as claimed in claim 1, characterized in that, The protrusion is on the far side of the other protrusion.
4. The catheter system as claimed in claim 1, characterized in that, The distal end of the protrusion includes a first side and a second side adjacent to the strain relief rib, wherein the first side and the second side are angled toward each other.
5. The catheter system as claimed in claim 1, characterized in that, The height of the distal end of the protrusion decreases in the distal direction.
6. The catheter system as claimed in claim 1, characterized in that, The strain relief ribs and the protrusions are disposed on the bottom of the catheter adapter and aligned with the longitudinal axis of the catheter adapter.
7. The catheter system as claimed in claim 1, characterized in that, The catheter system also includes a needle assembly comprising a needle hub and a guide needle fixed within the needle hub and extending through the catheter, wherein the needle hub is coupled to the catheter adapter.
8. The catheter system as claimed in claim 1, characterized in that, The catheter system also includes a needle cap removably coupled to the catheter adapter, wherein the inner surface of the needle cap includes a plurality of ribs and contacts the protrusion.
9. The catheter system as claimed in claim 8, characterized in that, The needle cap is removably attached to the catheter adapter via a friction fit.
10. The catheter system as claimed in claim 8, characterized in that, The needle cap is tubular.
11. The catheter system as claimed in claim 1, characterized in that, The second material includes an elastomer.
12. The catheter system as claimed in claim 1, characterized in that, The strain relief rib is substantially aligned with the longitudinal axis of the conduit adapter.
13. The catheter system as claimed in claim 1, characterized in that, The distal end of the generally cylindrical nose is connected to the strain relief rib, which surrounds the duct only partially and is made of a flexible material.
14. A catheter system, characterized in that, The catheter system includes: A catheter adapter, the catheter adapter including a body and a nose extending distally from the body, wherein the nose is generally cylindrical and includes a distal end and a proximal end; A catheter secured within the catheter adapter and extending distally beyond the nose; and A needle cap, which is removably attached to the catheter adapter. The catheter adapter further includes: A strain relief rib is disposed on the generally cylindrical nose portion, the strain relief rib extending outward from the generally cylindrical nose portion and extending along a length between the distal end and the proximal end of the generally cylindrical nose portion, wherein the strain relief rib only partially surrounds the conduit, wherein the strain relief rib includes a distal end, a proximal end, and a length extending from the distal end of the strain relief rib to the proximal end of the strain relief rib, wherein the width of the strain relief rib along its entire length is less than the width of the generally cylindrical nose portion, and wherein the strain relief rib is made of a flexible material; The protrusions provided on the strain-relieving ribs; and Another protrusion, which is aligned with the first protrusion along the longitudinal axis of the conduit system, wherein the first protrusion and the second protrusion extend outward from the conduit system further than the strain relief rib; The first portion of the inner surface of the needle cap contacts the protrusion and the other protrusion, and the second portion of the inner surface of the needle cap contacts the generally cylindrical nose.
15. A catheter system, characterized in that, The catheter system includes: A catheter that is fixed within the catheter adapter and extends distally beyond the generally cylindrical shape of the nose; The catheter adapter includes: ontology; The generally cylindrical nose portion extending distally from the body, the nose portion including a distal end and a proximal end, wherein the generally cylindrical nose portion is made of a first material; A strain-relieving rib extends outward from the generally cylindrical nose portion and along a length between the distal end and the proximal end of the generally cylindrical nose portion, wherein the strain-relieving rib only partially surrounds the conduit, wherein the strain-relieving rib includes a distal end and a proximal end, wherein the width of the proximal end of the strain-relieving rib is smaller than the width of the generally cylindrical nose portion, wherein the strain-relieving rib is made of a second material, wherein the first material is a rigid or semi-rigid material and the second material is a flexible material.
16. The catheter system according to claim 15, characterized in that, The catheter system also includes a needle cap removably coupled to the catheter adapter, wherein a first portion of the inner surface of the needle cap contacts a protrusion and another protrusion, and wherein a second portion of the inner surface of the needle cap contacts the generally cylindrical nose portion.