WO2012171193A1 - Anti-overflow catheter assembly for indwelling needle - Google Patents

Anti-overflow catheter assembly for indwelling needle Download PDF

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Publication number
WO2012171193A1
WO2012171193A1 PCT/CN2011/075796 CN2011075796W WO2012171193A1 WO 2012171193 A1 WO2012171193 A1 WO 2012171193A1 CN 2011075796 W CN2011075796 W CN 2011075796W WO 2012171193 A1 WO2012171193 A1 WO 2012171193A1
Authority
WO
WIPO (PCT)
Prior art keywords
sealing
catheter
base
upper
indwelling needle
Prior art date
Application number
PCT/CN2011/075796
Other languages
French (fr)
Chinese (zh)
Inventor
陈永曦
Original Assignee
Chen Yongxi
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chen Yongxi filed Critical Chen Yongxi
Priority to PCT/CN2011/075796 priority Critical patent/WO2012171193A1/en
Publication of WO2012171193A1 publication Critical patent/WO2012171193A1/en

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00Catheters; Hollow probes
    • A61M25/0097Catheters; Hollow probes characterised by the hub
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M39/00Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M2039/0036Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use characterised by a septum having particular features, e.g. having venting channels or being made from antimicrobial or self-lubricating elastomer
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00Catheters; Hollow probes
    • A61M25/01Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/06Body-piercing guide needles or the like
    • A61M25/0606"Over-the-needle" catheter assemblies, e.g. I.V. catheters

Abstract

An anti-overflow catheter assembly for an indwelling needle comprises a flexible catheter (1), a catheter seat (2) connected with one end of the catheter (1), and a sealing needleless adaptor (3). The sealing needleless adaptor (3) comprises a sealing base (32) and a sealing element (31). One end of the sealing base (32) is installed at the outer end of the catheter seat (2). The sealing element (31) is a soft elastic component, and integrally consists of an upper sealing sheet (311), a lower sealing sheet (313) and a middle sealing section (312). A centrally-located closing slit (314) is provided on the end face of the upper sealing sheet (311). The slit (314) passes from the upper sealing sheet (311), through the middle sealing section (312), and into the lower sealing sheet (313). The length of the slit (314) is longer than the radius of the upper sealing sheet (311). The sealing base (32) has a cylindrical inner cavity running through from left to right, in which the sealing element (31) is installed. The upper sealing sheet (311) and the lower sealing sheet (313) are hermetically secured on the two longitudinal end faces of the inner cavity of the sealing base (32) respectively, and there is a redundant space between the middle sealing section (312) and the cylindrical inner cavity. The whole needleless adaptor has a simple structure and a small quantity of components, and thus has a low cost.

Description

 Indwelling needle anti-hemorrhage catheter assembly  Technical field

The present invention relates to a medical device suitable for use in an intravascular, and more particularly to an indwelling needle anti-hemorrhage catheter assembly. It can be applied to a variety of indwelling needles, especially open indwelling needles, or high pressure infusions.

 Background technique

In the prior art, the indwelling needle comprises a catheter assembly and a needle tube assembly, the catheter assembly comprising a flexible catheter and a catheter hub connected to one end of the catheter, the needle tube assembly comprising a puncture steel needle, a needle holder mounted with a puncture steel needle, and a catheter holder Connected connecting members. Before use, the puncture needle is inserted into the flexible catheter and the needle tip is exposed, and the hub is connected to the catheter hub through the connecting member. In use, after successful puncture of the flexible catheter with a puncture steel needle, the medical staff is required to apply pressure on the skin directly above the puncture vessel to close the blood vessel, and then quickly withdraw the puncture steel needle, insert the infusion closure joint, and compress the blood vessel to minimize The blood continues to escape outward through the steel needle and the catheter as it exits the puncture needle. However, the above-mentioned techniques have the following disadvantages: First, the operation of the acupressure method is slightly inappropriate, and the blood outflow cannot be avoided, thereby causing blood pollution and causing safety hazards to medical personnel; secondly, the operation process of the indwelling needle is cumbersome. It requires skilled skills and rich experience, which will cause greater psychological pressure on medical staff and patients.

In order to solve the above problems, those skilled in the art have adopted various isolation heparin caps, and the general needle joints may bring a safety hazard of secondary puncture, and the puncture heparin cap easily brings the plastic particles away from the heparin cap into the human body. , causing secondary injury to the patient, so the needle-free joint is currently being used gradually, such as a positive pressure liquid inlet joint disclosed in Chinese Patent ZL200620025110.4; a needle-free medical joint disclosed in Chinese Patent 95197269.3; Chinese patent ZL200610033682 .1 disclosed a needleless joint, the above various needleless joint parts are numerous, the production and installation procedures are complicated, and the cost is extremely high, so that the price of the existing commercial indwelling needle is high, resulting in high cost of the hospital and The patient's high medical expenses; and the incoming infusion needs to flow through the various components. Although the components have been sterilized, there is still a threat of bacterial infection. The infusion is not direct enough. Once a component is misaligned or deformed, it will cause it. Invalid, the application is not good.

 Summary of the invention

The object of the present invention is to provide an indwelling needle anti-hemorrhage catheter assembly with simple structure, low cost and good infusion effect according to the deficiencies of the prior art.

 The object of the present invention is achieved by the following means:

The indwelling needle anti-hemorrhage catheter assembly comprises a flexible catheter and a catheter hub connected to one end of the catheter, the structural point of which further comprises a sealed needleless connector comprising a sealing base and a sealing member, a sealing base One end of the seat is mounted on the outer end of the catheter seat; the sealing member is a soft elastic member, which is composed of an integrated upper sealing piece, a lower sealing piece and an intermediate sealing section, and the end surface of the upper sealing piece is provided with a through-center sealing a slit, the slit passes through the upper sealing piece, passes through the intermediate sealing section, and penetrates the lower sealing piece, the slit length is larger than the radius of the upper sealing piece; the sealing base has a cylindrical inner cavity penetrating left and right, and the sealing member is installed inside the sealing base In the cavity, the upper sealing piece and the lower sealing piece are respectively tightly fixed on the longitudinal end faces of the inner cavity of the sealing base, and the intermediate sealing section and the cylindrical inner cavity have a redundant space.

During installation, the integrally formed sealing member is directly pressed into the sealing base, and the upper sealing piece and the lower sealing piece are respectively fixedly connected to the both end faces of the sealing base to form a sealed needleless joint, and then the sealing base and the sealing base are The catheter hub and the needle tube assembly are connected, and when used, the infusion or the tapered joint of the syringe is directly pressed into the long slit in the upper sealing sheet, because of the redundant space between the intermediate sealing section and the cylindrical inner cavity of the sealing base Therefore, when the tapered joint enters the intermediate sealing section, the sealing section can be deformed and expanded in the cylindrical inner cavity of the sealing base to form an infusion channel; as the intermediate sealing section expands, the gap on the lower sealing piece also expands The liquid medicine in the infusion set or the syringe can be directly transported into the lumen of the catheter socket, and enters the blood vessel through the catheter to realize direct infusion, thereby avoiding the infusion of the infusion channel, resulting in poor infusion effect, and bacterial infection. problem. Moreover, the entire needleless joint has a simple structure and few parts, so the production and installation cost is low, so that the price of the indwelling needle after installation is less than one tenth of the existing commercial price, and the economic effect is considerable, and the work of the hospital is alleviated. Cost and medical cost of the patient.

 The invention can be further specifically:

 One end surface of the sealing base is an arc-shaped end surface, and the upper sealing piece of the sealing member is fixedly connected with the curved end surface to form a concave curved structure.

The concave curved structure allows the tightness of the slit in the upper sealing sheet to exist, which facilitates the insertion of the tapered joint, saves time and labor in operation; on the other hand, the slit is more tight on the concave curved surface. Closed, when the taper joint is pulled out, it can achieve recovery and sealing faster and better.

The outer sealing end of the lower sealing piece of the sealing member has a triangular column-shaped tongue, and one side cylindrical surface is located on the slit, and the slit outlet in the sealing member coincides with the elongated apex formed by the other two cylindrical faces of the triangular tongue.

The cylindrical faces on both sides of the triangular tongue form a sloped slope on the upper sealing sheet. When the puncture steel needle is withdrawn from the catheter assembly, the blood return will quickly fill the lumen of the catheter seat, and blood pressure acts on the slope of the triangular cylindrical tongue. Upper, thereby pressing the gap of the tongue, making it more tightly closed, effectively preventing the bleeding. This special configuration of the sealing piece makes the indwelling needle suitable for needle-infusion joints and needle-free joints when infusion, especially for high-pressure infusion applications.

The intermediate sealing section is a flat structure, and the two sides may be a flat surface or a curved surface, and the slit of the sealing member coincides with the axial surface of the flat structure.

In order to facilitate the insertion of the tapered joint into the needleless joint, the gap of the seal needs to have a certain length, which is slightly larger than the radius of the upper sealing piece, so that the intermediate sealing section needs to provide a structure to cooperate with the slit, and the intermediate sealing section needs There is a certain expansion space, flat structure is the best choice, can be flat, or flat oval.

 The invention may further be specifically:

 The upper and lower sealing sheets of the seal are fixedly coupled to the sealing base by a glue.

 This type of installation is simple to operate and achieves a closed sterile lumen on the catheter assembly.

 The upper sealing piece of the seal is mounted on one end surface of the sealing base in a tight fit.

 This eliminates the need to introduce a third medium, but the sealing effect is slightly worse.

A fixing screw is disposed on the outer end surface of the sealing base, and the sealing base realizes an active connection with the infusion connector or the indwelling needle catheter hub or the needle cannula assembly through the fixing screw.

According to the rules of medical practice, the needle-free connector, like the heparin cap, needs to be replaced periodically, so it is necessary to provide a structure for the movable connection, making it easy to replace. In addition, the threaded infusion connector can also be directly connected to the needleless connector through the connecting member on the sealing base, without the need to insert a sealing member, thereby better achieving the anti-hemorrhage function of the sealed needleless connector.

In summary, the present invention provides a novel indwelling needle anti-hemorrhage catheter assembly that provides a sealed needleless connector that is primarily comprised of an integral seal and a sealed base for direct sterile infusion, The infusion channel is prevented from being twisted and long, and the infusion effect is poor, and there is a problem of bacterial infection. Moreover, the entire needleless joint has a simple structure and few parts, so the production and installation cost is low, so that the price of the indwelling needle after installation is less than one tenth of the existing commercial price, and the economic effect is considerable, and the work of the hospital is alleviated. Cost and medical cost of the patient.

 DRAWINGS

 1 is a schematic structural view of an indwelling needle anti-hemorrhage catheter assembly according to the present invention;

 2 is a schematic structural view showing a sealed needleless joint in the indwelling needle anti-hemorrhage catheter assembly of the present invention;

 Figure 3 is a schematic view showing the structure of the sealing member in the sealed needleless joint of the present invention;

 Figure 4 is a schematic view showing the structure of the sealing member in the sealed needleless joint of the present invention, which is different from the angle of Figure 3;

 Figure 5 is a schematic view showing the structure of a sealing base in the sealed needleless joint of the present invention;

 Figure 6 is a schematic view showing the structure of another sealing angle of the sealing base in the sealed needleless joint of the present invention;

 Fig. 7 is a structural schematic view showing the combination of the indwelling needle anti-hemorrhage catheter assembly and the needle tube assembly of the present invention.

 The invention will be further described below in conjunction with the embodiments.

 Specific embodiment

 Best embodiment:

Referring to Figure 1, the indwelling needle anti-hemorrhage catheter assembly comprises a flexible catheter 1, a catheter hub 2 connected to one end of the catheter 1, a sealed needleless connector 3 connected to the other end of the catheter hub 2, and a catheter-free connector 3 mounted to the catheter hub 2. An outer side wall and an exhaust passage 4 communicating with the inner cavity of the catheter seat 2, the exhaust passage having a vent plug, and an operation bucker also mounted on the outer side wall of the catheter seat 2 and symmetrically distributed on both sides of the exhaust passage 4 5. The following is a detailed description of the sealed needleless connector:

 Referring to Figure 2, the sealed needleless joint includes a seal 31 and a seal base 32:

Referring to Figure 3 and Figure 4, the sealing member 31 includes an upper sealing piece 311, an intermediate sealing portion 312 and a lower sealing piece 313 having an integrated structure, and an end surface of the upper sealing piece 311 is provided with a through-center sealing slit 314 (e.g. As shown in FIG. 3, the slit 314 passes through the upper sealing piece 311, passes through the intermediate sealing section 312, and penetrates the lower sealing piece 313. The length of the slit 314 is slightly larger than the radius of the upper sealing piece 311; the intermediate sealing section 312 is a flat structure. The two sides may be a flat surface, or may be a curved surface, the gap of the sealing member coincides with the axial surface of the flat structure; the outer sealing end surface of the lower sealing piece 313 of the sealing member has a triangular prism-shaped tongue 315, The side cylinder faces are located on the slit, and the outlet of the slit 314 in the seal coincides with the elongated apex formed by the other side cylinders of the triangular tab (as shown in FIG. 4).

Referring to FIG. 5 and FIG. 6, the sealing base 32 has a cylindrical inner cavity extending through the left and right sides, and a fixing screw 321 is disposed on the outer end surface. The sealing base 32 is realized by the fixing screw 321 and the infusion connector or the indwelling needle catheter. Active connection of components or syringe assemblies. One end of the sealing base 32 is an arcuate port 322 (as shown in FIG. 6);

According to the structural description of the sealing member 31 and the sealing base 32, the sealing needleless joint is further explained. Referring to FIG. 2, the upper sealing piece of the sealing member 31 and the arcuate port of the sealing base 32 are fixedly bonded together by a glue. Also, the lower sealing sheet is also bonded to the other end surface of the sealing base 32 by glue. The upper sealing sheet forms a concave arcuate configuration on the curved port; the slit 314 on the upper sealing sheet is located at the lowest position of the recess.

Referring to Figure 7, in the present embodiment, the indwelling needle is shipped from the factory, the sealing base is connected to the needle cannula assembly 6 through its fixing screw, and the puncture steel needle on the indwelling needle needle assembly passes through the flexible catheter 1 and The needle tip is exposed and the catheter hub 2 is connected to the needle cannula assembly 6 via a needleless connector 3.

 The parts not described in the present invention are the same as those in the prior art.

Claims (7)

  1. An indwelling needle anti-hemorrhage catheter assembly comprising a flexible catheter (1) and a catheter hub (2) coupled to one end of the catheter (1), characterized in that it further comprises a sealed needleless connector (3), the needleless connector (3) comprising a sealing base (32) and a sealing member (31), one end of the sealing base (32) is mounted on the outer end of the catheter socket (2); the sealing member (31) is a soft elastic member. The upper sealing piece (311), the lower sealing piece (313) and the intermediate sealing section (312) are formed. The end surface of the upper sealing piece (311) is provided with a through-center sealing gap (314), the slit (314). Passing through the upper sealing piece (311), through the intermediate sealing section (312), through the lower sealing piece (313), the length of the slit (314) is larger than the radius of the upper sealing piece; the sealing base (32) has a cylindrical inner diameter a cavity, a sealing member (31) is mounted in the inner cavity of the sealing base (32), and the upper sealing piece (311) and the lower sealing piece (313) are respectively fixedly fixed to the longitudinal end faces of the inner cavity of the sealing base (32). Upper, there is a redundant space between the intermediate sealing section (312) and the cylindrical inner cavity.
  2. The indwelling needle anti-hemorrhage catheter assembly according to claim 1, wherein
    An end surface of the sealing base (32) is an arcuate end surface, and an upper sealing piece (311) of the sealing member (31) is fixedly coupled to the curved end surface to form a concave arcuate configuration.
  3. The indwelling needle anti-hemorrhage catheter assembly according to claim 1, wherein
    The lower sealing piece (313) of the sealing member (31) has a triangular column-shaped tongue (315) on the outer end surface thereof, one side cylinder surface is located on the slit, and the slit outlet in the sealing member and the triangular cylindrical tongue (315) are additionally The long apex formed by the cylindrical faces on both sides coincide.
  4. The indwelling needle anti-hemorrhage catheter assembly according to claim 1, wherein
    The intermediate seal section (312) is of a flat configuration, the two sides are either planar or a curved face, and the slit (314) of the seal (31) coincides with the axial face of the flat structure.
  5. The indwelling needle anti-hemorrhage catheter assembly according to claim 1, wherein
    The upper sealing piece (311) and the lower sealing piece (313) of the sealing member (31) are fixedly coupled to the sealing base (32) by a glue.
  6. The indwelling needle anti-hemorrhage catheter assembly according to claim 1, wherein
    The upper sealing piece (311) of the sealing member (31) is mounted on one end surface of the sealing base (32) with a tight fit.
  7. The indwelling needle anti-hemorrhage catheter assembly according to claim 1, wherein
    A fixing screw (321) is distributed on the outer end surface of the sealing base (32), and the sealing base (32) realizes an active connection with the infusion connector or the indwelling needle catheter hub or the needle cannula assembly through the fixing screw (321).
PCT/CN2011/075796 2011-06-16 2011-06-16 Anti-overflow catheter assembly for indwelling needle WO2012171193A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2011/075796 WO2012171193A1 (en) 2011-06-16 2011-06-16 Anti-overflow catheter assembly for indwelling needle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2011/075796 WO2012171193A1 (en) 2011-06-16 2011-06-16 Anti-overflow catheter assembly for indwelling needle

Publications (1)

Publication Number Publication Date
WO2012171193A1 true WO2012171193A1 (en) 2012-12-20

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Application Number Title Priority Date Filing Date
PCT/CN2011/075796 WO2012171193A1 (en) 2011-06-16 2011-06-16 Anti-overflow catheter assembly for indwelling needle

Country Status (1)

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WO (1) WO2012171193A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1612762A (en) * 2001-12-07 2005-05-04 贝克顿迪肯森公司 Needleless luer access connector
CN1658922A (en) * 2002-05-01 2005-08-24 贝克顿·迪金森公司 Needleless luer access connector
CN1899633A (en) * 2006-07-21 2007-01-24 张亚平 Needleless seal transfusion joint
CN101024101A (en) * 2006-02-20 2007-08-29 佛山特种医用导管有限责任公司 Remain-type infusion device
CN101104094A (en) * 2007-08-10 2008-01-16 张亚根 Safety type artery and venous indwelling needle with airtight interface without needle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1612762A (en) * 2001-12-07 2005-05-04 贝克顿迪肯森公司 Needleless luer access connector
CN1658922A (en) * 2002-05-01 2005-08-24 贝克顿·迪金森公司 Needleless luer access connector
CN101024101A (en) * 2006-02-20 2007-08-29 佛山特种医用导管有限责任公司 Remain-type infusion device
CN1899633A (en) * 2006-07-21 2007-01-24 张亚平 Needleless seal transfusion joint
CN101104094A (en) * 2007-08-10 2008-01-16 张亚根 Safety type artery and venous indwelling needle with airtight interface without needle

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