WO2008130077A1 - Catheter with blood backflow preventing function - Google Patents

Catheter with blood backflow preventing function Download PDF

Info

Publication number
WO2008130077A1
WO2008130077A1 PCT/KR2007/003586 KR2007003586W WO2008130077A1 WO 2008130077 A1 WO2008130077 A1 WO 2008130077A1 KR 2007003586 W KR2007003586 W KR 2007003586W WO 2008130077 A1 WO2008130077 A1 WO 2008130077A1
Authority
WO
WIPO (PCT)
Prior art keywords
catheter
blood
hollow
split
tube support
Prior art date
Application number
PCT/KR2007/003586
Other languages
French (fr)
Inventor
Sang Yoon Park
Original Assignee
Sang Yoon Park
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 Sang Yoon Park filed Critical Sang Yoon Park
Publication of WO2008130077A1 publication Critical patent/WO2008130077A1/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES 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
    • A61M25/00—Catheters; Hollow probes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES 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
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES 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
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/02—Holding devices, e.g. on the body
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES 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
    • A61M25/00—Catheters; Hollow probes
    • A61M25/0097—Catheters; Hollow probes characterised by the hub
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES 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
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/22—Valves or arrangement of valves
    • A61M39/24—Check- or non-return valves

Definitions

  • the present invention relates to a catheter, and more particularly, to a catheter with a blood backflow preventing function.
  • a medical fluid is compulsorily infused into a blood vessel of a patient through a medical fluid infusion set.
  • a blood is compulsorily infused into a blood vessel of a patient through a blood transfusion set.
  • An IV catheter may serve as a path through which bacteria invade into a blood vessel, and so it is very important to keep an IV catheter itself and its circumstance clean in order to prevent a bacterial infection.
  • the present invention is directed to a catheter with a blood backflow preventing function in which a backflow of a blood from a vein to a catheter hub which occurs due to a blood pressure is prevented when a cannula and a cannula hub are removed after a vein is punctured by an IV catheter.
  • An aspect of the present invention provides a medical catheter for supplying a medical fluid or a blood, comprising: a hollow catheter hub having a hollow tube support formed at a front thereof, the hollow tube support having a smaller diameter than the hollow catheter; a catheter tube having one portion arranged inside the hollow tube support and the other portion extending outside the hollow tube support; and a blood stopper arranged inside the hollow catheter hub to allow a medical fluid or a blood to pass through and to prevent a blood flowing back from the catheter tube.
  • the medical catheter may further comprise a hollow fixing pin inserted into the hollow tube support to fix the catheter tube.
  • the blood stopper may have a split portion for allowing a medical fluid or a blood to pass through and preventing a blood flowing back from the catheter tube.
  • the blood stopper may have a cone-shaped portion, and the split portion is formed at a central portion of the cone-shaped portion.
  • the split portion may have a split which is formed in a "-" form, a "+” form, or a "Y" form.
  • An example embodiment of the present invention provides a catheter with a blood backflow preventing function, comprising: a catheter hub having an internal space whose rear is opened and being formed integrally with a hollow tube support formed at a front thereof; a catheter tube supported by the tube support and extending outside the tube support by a predetermined length; and a blood stopper having a split formed at a central portion thereof, preventing a blood backflow from the catheter tube and allowing a medical fluid to flow to the catheter tube.
  • the cone-shaped portion may have a vertex of a curved surface.
  • the blood stopper may be made of silicon rubber.
  • the split may be formed in a "-" form, a "+” form or a "Y” form.
  • FIG. 1 is a cross-sectional view illustrating a state that a cannula is coupled to a catheter with a blood backflow preventing function according to an example embodiment of the present invention
  • FIG. 2 is a cross-sectional view illustrating a state that the cannula is removed from the catheter according to the example embodiment of the present invention
  • FIG. 3 is a cross-sectional view illustrating a cross-sectional view illustrating a state that a patient's blood vessel is punctured by the catheter according to the example embodiment of the present invention
  • FIGs. 4 and 5 are side views illustrating blood stoppers of a cone type according to the example embodiment of the present invention
  • FIGs. 4 and 5 are side views illustrating blood stoppers of a cone type according to the example embodiment of the present invention
  • FIG. 6 to 8 are cross-sectional views illustrating splits which may be formed in the cone-type blood stopper;
  • FIG. 9 is a side view illustrating a blood stopper of a cylindrical type according to the example embodiment of the present invention;
  • FIGs. 10 to 12 are cross-sectional views illustrating splits which may be formed in the cylindrical blood stopper;
  • FIG. 13 is a view to explain an operation of the catheter with a blood backflow preventing function according to the example embodiment of the present invention.
  • FIG. 1 is a cross-sectional view illustrating a state that a cannula is coupled to a catheter with a blood backflow preventing function according to an example embodiment of the present invention.
  • FIG. 2 is a cross-sectional view illustrating a state that the cannula is removed from the catheter according to the example embodiment of the present invention.
  • FIG. 3 is a cross-sectional view illustrating a cross-sectional view illustrating a state that a patient's blood vessel is punctured by the catheter according to the example embodiment of the present invention.
  • the catheter having a cannula coupled thereto comprises a cannula hub 10, a cannula 12, a catheter hub 14, a tube support 16, a hollow fixing pin 18, a catheter tube 20, and a blood stopper 22.
  • the catheter tube 14 has an internal space whose rear is opened and is formed integrally with the hollow tube support 16 having a relatively small diameter at its front.
  • the cannula hub 10 seals or closes the opened rear of the catheter hub 14 and holds and supports the cannula 12.
  • the blood stopper 22 is installed such that it is caught by a protruding portion formed in the internal space of the catheter hub 14 or it is adhered to the internal space of the catheter hub 14 by an adhesive, which is easily realized by a person having ordinary skill in the art.
  • the hollow fixing pin 18 may be fixed to an inner side of the tube support 16.
  • the catheter tube 20 may be formed such that its one side is connected to the hollow fixing pin 18 and the other side extends outside the tube support 16 by a predetermined length.
  • the catheter tube 20 is guided by the cannula 12 to be inserted into a blood vessel 30 of a patient as shown in FIG. 3.
  • the cannula 12 penetrates the blood stopper 22 and goes through the fixing pin 18 and the catheter tube 20 to protrude outside the catheter tube 20.
  • the cannula 12 punctures a patient's blood vessel 30 to guide the catheter tube 20 to the blood vessel 30. Thereafter, a user removes the cannula 12 and the cannula hub 10 as shown in FIG. 2. At this time, the cannula 12 does not penetrate the blood stopper 22 any more.
  • the blood stopper 22 is made of rubber having an excellent restoring force. A portion of the blood stopper 22 which is penetrated by the cannula 12 automatically returns to an original state to thereby be closed. Accordingly, a blood does not flow back to the catheter hub 14 from the catheter tube 20.
  • the catheter of the present invention is possible to prevent a backflow of a blood by the blood stopper 22. Therefore, even while the catheter tube 20 stays in the blood vessel, it is possible to change a medical fluid, suppressing a backflow of a blood.
  • the blood stopper may have various forms.
  • the blood stopper may have a cone-type as shown in FIGs. 4 and 5 or have a cylindrical type as shown in FIG. 9.
  • FIGs. 4 and 5 are side views illustrating blood stoppers of a cone type according to the example embodiment of the present invention.
  • the cone-type blood stopper 40 may have a fastigiated vertex as shown in FIG. 4 or may have a covered surface or a round portion in which its gradient is larger as it is closer to a vertex.
  • the cone-type blood stoppers 40 of both cases are preferably made of silicon rubber.
  • the blood stoppers 40 and 41 have a hollow cone shape and are selectively installed so that their cones face the catheter tube 20 in the catheter hub 14.
  • FIGs. 6 to 8 are cross-sectional views illustrating splits which may be formed in the cone-type blood stopper.
  • the split may have various shapes such as a "-" shaped split
  • a principle that the cone-type blood stoppers 40 and 41 allow or stop a flow of a medical fluid is as follows.
  • Cone portions of the cone-type blood stoppers 40 and 41 get a relatively small pressure from a flow of a medical fluid, and thus splits formed in the cone-type blood stoppers 40 and 41 are not opened.
  • opposite portions of the cone- type blood stoppers 40 and 41 to the cone portions get a relatively large pressure from a flow of a medical fluid, and thus the splits formed in the cone-type blood stoppers 40 and 41 are opened.
  • FIG. 9 is a side view illustrating a blood stopper of a cylindrical type according to the example embodiment of the present invention.
  • the catheter of FIG. 9 is a cylindrical blood stopper 50.
  • the cylindrical blood stopper 50 may be made of silicon rubber.
  • a split may be formed in a central portion of the cylindrical blood stopper 50.
  • the split may have various shapes such as a "-" shaped split 42, a "+” shaped split 44 and a Y-shaped split 46.
  • FIG. 13 is a view to explain an operation of the catheter with a blood backflow preventing function according to the example embodiment of the present invention.
  • a supplying tube 60 for supplying a blood or a medical fluid has a lure tip 62 at its end.
  • the lure tip 62 is inserted into an inside of the catheter to push the cylindrical blood stopper 50.
  • the split of the cylindrical blood stopper 50 is in a closed state at ordinary times, and so a blood which flows back from the catheter tube 20 does not go to the rear portion of the catheter hub 14.
  • the split formed at its central portion of the cylindrical blood stopper 50 is pushed by the lure tip 62, so that the split is opened and a medical fluid is supplied from the lure tip 62 to the catheter tube 20.
  • the lure tip 62 retreats and so the split of the cylindrical blood stopper 50 is not pushed, the split returns to its original state and so it is closed. If the cylindrical blood stopper 50 is made of silicon rubber, the restoring force can be more improved.
  • the split is opened or closed depending on a pressure of the lure tip 62.
  • the lure tip 62 and the cylindrical blood stopper 50 contact, and the split formed in the cylindrical blood stopper 50 can be opened by a pushing force of the lure tip 62.
  • the catheter of the present invention can be used for blood sampling.
  • the injector 60 may have a tip 62 which has no needle.
  • the tip 62 of the injector is inserted into the catheter to thereby push the cylindrical blood stopper 50. That is, the tip 62 of the injector 60 pushes the split formed at a central portion of the cylindrical blood stopper 50 to thereby open the split.
  • a cylinder pressure of the injector 60 gets lowered in a state that the split is opened, a blood goes into the injector through the catheter tube which punctures a blood vessel and the opened split.
  • the present invention can be applied to catheters of various types as well as the IV catheter.
  • the catheter of the present invention has the blood stopper and thus prevents a blood from flowing back to the catheter hub from a vein by a blood pressure when the cannula and the cannula hub are removed from the catheter hub after a patient's vein is punctured by the IV catheter. Also, when the lure tip connected to the end of the medical fluid supplying tube is removed from the catheter in order to change a medical fluid set, a backflow of a blood from a vein to the catheter hub is prevented. Accordingly, it is possible to prevent a bacterial infection which may occur by a blood which flows back through the IV catheter. Furthermore, the catheter of the present invention can be used for sampling a blood as well as for supplying a blood or a medical fluid.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biophysics (AREA)
  • Pulmonology (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Media Introduction/Drainage Providing Device (AREA)

Abstract

A catheter with a blood backflow preventing function is disclosed. The catheter with a blood backflow preventing function includes: a hollow catheter hub having a hollow tube support formed at a front thereof, the hollow tube support having a smaller diameter than the hollow catheter; a catheter tube having one portion arranged inside the hollow tube support and the other portion extending outside the hollow tube support; and a blood stopper arranged inside the hollow catheter hub to allow a medical fluid or a blood to pass through and to prevent a blood flowing back from the catheter tube.

Description

Description
CATHETER WITH BLOOD BACKFLOW PREVENTING
FUNCTION
Technical Field
[1] The present invention relates to a catheter, and more particularly, to a catheter with a blood backflow preventing function. Background Art
[2] In case of a patient who can not have a food, a surgical patient, and a patient whose body function is weak and so is forced to be supplied with nutrition, a medical fluid is compulsorily infused into a blood vessel of a patient through a medical fluid infusion set. In case of patents who need a blood transfusion, a blood is compulsorily infused into a blood vessel of a patient through a blood transfusion set.
[3] When nutrients are supplied to or a medical fluid or blood is infused into a patient's blood vessel through a medical fluid infusion set or blood transfusion set, a patient's vein is punctured by a special injection needle, called an Inter Venous (IV) catheter, a cannula and cannula hub are removed, an then a lure tip of a medical fluid infusion set or a blood transfusion set is connected to a rear of an IV catheter.
[4] An IV catheter may serve as a path through which bacteria invade into a blood vessel, and so it is very important to keep an IV catheter itself and its circumstance clean in order to prevent a bacterial infection.
[5] However, in a conventional IV catheter, since a vein is punctured through a cannula and then a cannula and a cannula hub are removed from a catheter hub, a blood in a vein may flow back through a catheter tube due to a blood pressure.
[6] If a blood in a vein flows back through a catheter tube due to a blood pressure, a blood may be infected by bacteria. The bacterial infection occurred by a blood backflow into a catheter tube may bring a fatal result to a patient, prolonging an in- hospital period and also increases an in-hospital cost and a death rate. Disclosure of Invention
[7] The present invention is directed to a catheter with a blood backflow preventing function in which a backflow of a blood from a vein to a catheter hub which occurs due to a blood pressure is prevented when a cannula and a cannula hub are removed after a vein is punctured by an IV catheter.
[8] An aspect of the present invention provides a medical catheter for supplying a medical fluid or a blood, comprising: a hollow catheter hub having a hollow tube support formed at a front thereof, the hollow tube support having a smaller diameter than the hollow catheter; a catheter tube having one portion arranged inside the hollow tube support and the other portion extending outside the hollow tube support; and a blood stopper arranged inside the hollow catheter hub to allow a medical fluid or a blood to pass through and to prevent a blood flowing back from the catheter tube. The medical catheter may further comprise a hollow fixing pin inserted into the hollow tube support to fix the catheter tube.
[9] The blood stopper may have a split portion for allowing a medical fluid or a blood to pass through and preventing a blood flowing back from the catheter tube.
[10] The blood stopper may have a cone-shaped portion, and the split portion is formed at a central portion of the cone-shaped portion.
[11] The split portion may have a split which is formed in a "-" form, a "+" form, or a "Y" form.
[12] An example embodiment of the present invention provides a catheter with a blood backflow preventing function, comprising: a catheter hub having an internal space whose rear is opened and being formed integrally with a hollow tube support formed at a front thereof; a catheter tube supported by the tube support and extending outside the tube support by a predetermined length; and a blood stopper having a split formed at a central portion thereof, preventing a blood backflow from the catheter tube and allowing a medical fluid to flow to the catheter tube.
[13] Another example embodiment of the present invention provides a catheter with a blood backflow preventing function, comprising: a catheter hub having an internal space whose rear is opened and being formed integrally with a hollow tube support formed at a front thereof; a catheter tube supported by the tube support and extending outside the tube support by a predetermined length; and a blood stopper having a cone- shaped portion and a split having a restoring force formed in the cone-shaped portion, wherein the blood stopper is installed in the internal space such that the cone-shape portion faces the catheter tube.
[14] Another example embodiment of the present invention provides a catheter with a blood backflow preventing function, comprising: a catheter hub having an internal space whose rear is opened and being formed integrally with a hollow tube support formed at a front thereof; a catheter tube supported by the tube support and extending outside the tube support by a predetermined length; and a blood stopper installed in the internal space and having a split having a restoring force formed at a central portion thereof, wherein the split is pushed by a lure tip and is opened when a medical fluid is supplied.
[15] The cone-shaped portion may have a vertex of a curved surface.
[16] The blood stopper may be made of silicon rubber.
[17] The split may be formed in a "-" form, a "+" form or a "Y" form. Brief Description of the Drawings
[18] FIG. 1 is a cross-sectional view illustrating a state that a cannula is coupled to a catheter with a blood backflow preventing function according to an example embodiment of the present invention; [19] FIG. 2 is a cross-sectional view illustrating a state that the cannula is removed from the catheter according to the example embodiment of the present invention; [20] FIG. 3 is a cross-sectional view illustrating a cross-sectional view illustrating a state that a patient's blood vessel is punctured by the catheter according to the example embodiment of the present invention; [21] FIGs. 4 and 5 are side views illustrating blood stoppers of a cone type according to the example embodiment of the present invention; [22] FIGs. 6 to 8 are cross-sectional views illustrating splits which may be formed in the cone-type blood stopper; [23] FIG. 9 is a side view illustrating a blood stopper of a cylindrical type according to the example embodiment of the present invention; [24] FIGs. 10 to 12 are cross-sectional views illustrating splits which may be formed in the cylindrical blood stopper; [25] FIG. 13 is a view to explain an operation of the catheter with a blood backflow preventing function according to the example embodiment of the present invention. [26] * Description of Major Symbol in the above Figures
[27] 10: Cannula hub 12: Cannula
[28] 14: Catheter hub 16: Tube support
[29] 18 : Fixing pin 20: Catheter tube
[30] 22: Blood stopper 30: Blood vessel
[31] 40,41: Cone-type blood stopper 42,52:"-"-shaped split
[32] 44,54: "+"-shaped split 46,56: "Y"-shaped split
[33] 50: Cylindrical blood stopper 60: Supplying tube
[34] 62: Tip
Best Mode for Carrying Out the Invention [35] Hereinafter, example embodiments of the present invention will be described in detail. However, the present invention is not limited to the example embodiments disclosed below, but can be implemented in various types. Therefore, the present example embodiments are provided for complete disclosure of the present invention and to fully inform the scope of the present invention to those ordinarily skilled in the art. [36] FIG. 1 is a cross-sectional view illustrating a state that a cannula is coupled to a catheter with a blood backflow preventing function according to an example embodiment of the present invention. FIG. 2 is a cross-sectional view illustrating a state that the cannula is removed from the catheter according to the example embodiment of the present invention. FIG. 3 is a cross-sectional view illustrating a cross-sectional view illustrating a state that a patient's blood vessel is punctured by the catheter according to the example embodiment of the present invention.
[37] Referring to FIGs. 1 to 3, the catheter having a cannula coupled thereto comprises a cannula hub 10, a cannula 12, a catheter hub 14, a tube support 16, a hollow fixing pin 18, a catheter tube 20, and a blood stopper 22.
[38] The catheter tube 14 has an internal space whose rear is opened and is formed integrally with the hollow tube support 16 having a relatively small diameter at its front.
[39] The cannula hub 10 seals or closes the opened rear of the catheter hub 14 and holds and supports the cannula 12. The blood stopper 22 is installed such that it is caught by a protruding portion formed in the internal space of the catheter hub 14 or it is adhered to the internal space of the catheter hub 14 by an adhesive, which is easily realized by a person having ordinary skill in the art.
[40] The hollow fixing pin 18 may be fixed to an inner side of the tube support 16.
[41] The catheter tube 20 may be formed such that its one side is connected to the hollow fixing pin 18 and the other side extends outside the tube support 16 by a predetermined length. The catheter tube 20 is guided by the cannula 12 to be inserted into a blood vessel 30 of a patient as shown in FIG. 3.
[42] The cannula 12 penetrates the blood stopper 22 and goes through the fixing pin 18 and the catheter tube 20 to protrude outside the catheter tube 20. The cannula 12 punctures a patient's blood vessel 30 to guide the catheter tube 20 to the blood vessel 30. Thereafter, a user removes the cannula 12 and the cannula hub 10 as shown in FIG. 2. At this time, the cannula 12 does not penetrate the blood stopper 22 any more. Preferably, the blood stopper 22 is made of rubber having an excellent restoring force. A portion of the blood stopper 22 which is penetrated by the cannula 12 automatically returns to an original state to thereby be closed. Accordingly, a blood does not flow back to the catheter hub 14 from the catheter tube 20.
[43] As described above, the catheter of the present invention is possible to prevent a backflow of a blood by the blood stopper 22. Therefore, even while the catheter tube 20 stays in the blood vessel, it is possible to change a medical fluid, suppressing a backflow of a blood.
[44] The blood stopper may have various forms. For example, the blood stopper may have a cone-type as shown in FIGs. 4 and 5 or have a cylindrical type as shown in FIG. 9.
[45] FIGs. 4 and 5 are side views illustrating blood stoppers of a cone type according to the example embodiment of the present invention. [46] The cone-type blood stopper 40 may have a fastigiated vertex as shown in FIG. 4 or may have a covered surface or a round portion in which its gradient is larger as it is closer to a vertex. The cone-type blood stoppers 40 of both cases are preferably made of silicon rubber.
[47] The blood stoppers 40 and 41 have a hollow cone shape and are selectively installed so that their cones face the catheter tube 20 in the catheter hub 14.
[48] Splits having a restoring force may be formed in the cone of the cone-type blood stoppers 40 and 41. FIGs. 6 to 8 are cross-sectional views illustrating splits which may be formed in the cone-type blood stopper.
[49] As shown in FIGs. 6 to 8, the split may have various shapes such as a "-" shaped split
42, a "+" shaped split 44 and a Y-shaped split 46. Therefore, a blood which flows back to the catheter tube 20 does not go to the rear portion of the catheter hub 14. On the other hand, a medical fluid which is supplied from the rear portion of the catheter hub 14 goes to the catheter tube 20.
[50] A principle that the cone-type blood stoppers 40 and 41 allow or stop a flow of a medical fluid is as follows.
[51] Cone portions of the cone-type blood stoppers 40 and 41 get a relatively small pressure from a flow of a medical fluid, and thus splits formed in the cone-type blood stoppers 40 and 41 are not opened. On the other hand, opposite portions of the cone- type blood stoppers 40 and 41 to the cone portions get a relatively large pressure from a flow of a medical fluid, and thus the splits formed in the cone-type blood stoppers 40 and 41 are opened.
[52] FIG. 9 is a side view illustrating a blood stopper of a cylindrical type according to the example embodiment of the present invention.
[53] The catheter of FIG. 9 is a cylindrical blood stopper 50. The cylindrical blood stopper 50 may be made of silicon rubber. Similarly to those of FIGs. 4 and 5, a split may be formed in a central portion of the cylindrical blood stopper 50. For example, as shown in FIGs. 10 to 12, the split may have various shapes such as a "-" shaped split 42, a "+" shaped split 44 and a Y-shaped split 46.
[54] FIG. 13 is a view to explain an operation of the catheter with a blood backflow preventing function according to the example embodiment of the present invention.
[55] Referring to FIG. 13, a supplying tube 60 for supplying a blood or a medical fluid has a lure tip 62 at its end. In order to supply a blood or a medical fluid, the lure tip 62 is inserted into an inside of the catheter to push the cylindrical blood stopper 50.
[56] The split of the cylindrical blood stopper 50 is in a closed state at ordinary times, and so a blood which flows back from the catheter tube 20 does not go to the rear portion of the catheter hub 14. However, when a blood or a medical fluid is supplied, the split formed at its central portion of the cylindrical blood stopper 50 is pushed by the lure tip 62, so that the split is opened and a medical fluid is supplied from the lure tip 62 to the catheter tube 20. When the lure tip 62 retreats and so the split of the cylindrical blood stopper 50 is not pushed, the split returns to its original state and so it is closed. If the cylindrical blood stopper 50 is made of silicon rubber, the restoring force can be more improved.
[57] The split is opened or closed depending on a pressure of the lure tip 62. When the lure tip 62 is connected from the rear of the catheter hub 14, the lure tip 62 and the cylindrical blood stopper 50 contact, and the split formed in the cylindrical blood stopper 50 can be opened by a pushing force of the lure tip 62.
[58] If the medical fluid supplying tube 60 is an injector, the catheter of the present invention can be used for blood sampling. For example, the injector 60 may have a tip 62 which has no needle. In order to sample a blood, the tip 62 of the injector is inserted into the catheter to thereby push the cylindrical blood stopper 50. That is, the tip 62 of the injector 60 pushes the split formed at a central portion of the cylindrical blood stopper 50 to thereby open the split. When a cylinder pressure of the injector 60 gets lowered in a state that the split is opened, a blood goes into the injector through the catheter tube which punctures a blood vessel and the opened split.
[59] Meanwhile, the present invention can be applied to catheters of various types as well as the IV catheter.
[60] As described above, the catheter of the present invention has the blood stopper and thus prevents a blood from flowing back to the catheter hub from a vein by a blood pressure when the cannula and the cannula hub are removed from the catheter hub after a patient's vein is punctured by the IV catheter. Also, when the lure tip connected to the end of the medical fluid supplying tube is removed from the catheter in order to change a medical fluid set, a backflow of a blood from a vein to the catheter hub is prevented. Accordingly, it is possible to prevent a bacterial infection which may occur by a blood which flows back through the IV catheter. Furthermore, the catheter of the present invention can be used for sampling a blood as well as for supplying a blood or a medical fluid.

Claims

Claims
[I] A catheter with a blood backflow preventing function, comprising: a hollow catheter hub having a hollow tube support formed at a front thereof, the hollow tube support having a smaller diameter than the hollow catheter; a catheter tube having one portion arranged inside the hollow tube support and the other portion extending outside the hollow tube support; and a blood stopper arranged inside the hollow catheter hub to allow a medical fluid or a blood to pass through and to prevent a blood flowing back from the catheter tube.
[2] The medical catheter of claim 1, further comprising, a hollow fixing pin inserted into the hollow tube support to fix the catheter tube.
[3] The medical catheter of claim 1. wherein the blood stopper has a split portion for allowing a medical fluid or a blood to pass through and preventing a blood flowing back from the catheter tube.
[4] A catheter with a blood backflow preventing function, comprising: a hollow catheter hub having a hollow tube support formed at a front thereof, the hollow tube support having a smaller diameter than the hollow catheter; a catheter tube having one portion arranged inside the hollow tube support and the other portion extending outside the hollow tube support; and a blood stopper having a cone-shaped portion and a split having a restoring force formed in the cone-shaped portion, wherein the blood stopper is installed inside the hollow catheter hub such that the cone-shape portion faces the catheter tube.
[5] The catheter of claim 4, wherein the cone-shaped portion has a vertex of a curved surface.
[6] The catheter of claim 4, wherein the blood stopper is made of silicon rubber.
[7] The catheter of claim 4, wherein the split is formed in a "-" form.
[8] The catheter of claim 4, wherein the split is formed in a "+" form.
[9] The catheter of claim 4, wherein the split is formed in a "Y" form.
[10] A catheter with a blood backflow preventing function, comprising: a hollow catheter hub having a hollow tube support formed at a front thereof, the hollow tube support having a smaller diameter than the hollow catheter; a catheter tube having one portion arranged inside the hollow tube support and the other portion extending outside the hollow tube support; and a blood stopper installed inside the hollow catheter hub and having a split having a restoring force formed at a central portion thereof, wherein the split is pushed by a lure tip and is opened when a medical fluid is supplied.
[I I] The catheter of claim 10, wherein the blood stopper is made of silicon rubber.
[12] The catheter of claim 10, wherein the split is formed in a "-" form.
[13] The catheter of claim 10, wherein the split is formed in a "+" form.
[14] The catheter of claim 10, wherein the split is formed in a "Y" form.
PCT/KR2007/003586 2007-04-23 2007-07-26 Catheter with blood backflow preventing function WO2008130077A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2007-0039247 2007-04-23
KR1020070039247A KR100843163B1 (en) 2007-04-23 2007-04-23 Blood back flow prevention catheter

Publications (1)

Publication Number Publication Date
WO2008130077A1 true WO2008130077A1 (en) 2008-10-30

Family

ID=39823515

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2007/003586 WO2008130077A1 (en) 2007-04-23 2007-07-26 Catheter with blood backflow preventing function

Country Status (2)

Country Link
KR (1) KR100843163B1 (en)
WO (1) WO2008130077A1 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012149109A2 (en) * 2011-04-26 2012-11-01 Devgon Pitamber Systems and methods for phlebotomy through a peripheral iv catheter
US9744344B1 (en) 2016-06-30 2017-08-29 Velano Vascular, Inc. Devices and methods for catheter placement within a vein
US9750446B2 (en) 2011-04-26 2017-09-05 Velano Vascular, Inc. Systems and methods for phlebotomy through a peripheral IV catheter
US10076272B2 (en) 2011-04-26 2018-09-18 Velano Vascular, Inc. Systems and methods for phlebotomy through a peripheral IV catheter
US10143411B2 (en) 2009-07-21 2018-12-04 The General Hospital Corporation Peripheral blood sampling methods and devices
US10300247B2 (en) 2016-02-03 2019-05-28 Velano Vascular, Inc. Devices and methods for fluid transfer through a placed peripheral intravenous catheter
US10773056B2 (en) 2017-03-21 2020-09-15 Velano Vascular, Inc. Systems and methods for controlling catheter device size
US11090461B2 (en) 2017-03-21 2021-08-17 Velano Vascular, Inc. Devices and methods for fluid transfer through a placed peripheral intravenous catheter
US11207498B2 (en) 2019-08-20 2021-12-28 Velano Vascular, Inc. Fluid transfer devices with extended length catheters and methods of using the same
US11389624B2 (en) 2020-11-26 2022-07-19 Avia Vascular, Llc Blood collection devices, systems, and methods

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200464439Y1 (en) * 2012-09-03 2013-01-03 김부윤 Catheter for medical treatment
KR101660713B1 (en) 2015-09-21 2016-09-28 이상운 Safety I.V. catheter set
KR101728963B1 (en) * 2015-10-16 2017-04-20 박은정 Catheter for medical use
KR20180055095A (en) * 2016-11-16 2018-05-25 최근욱 Medical injection set with blood leak prevention and backdraft prevention fuction
KR102124576B1 (en) 2020-03-30 2020-06-18 주식회사 사군자 3way type intravascular catheter
KR102124577B1 (en) 2020-03-30 2020-06-18 주식회사 사군자 2way type intravascular catheter

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5030205A (en) * 1989-12-18 1991-07-09 Critikon, Inc. Catheter assemblies for prevention of blood leakage
US5053014A (en) * 1990-02-01 1991-10-01 Critikon, Inc. Catheter with controlled valve
US5092845A (en) * 1989-07-10 1992-03-03 Critikon, Inc. Catheter with needle gasket
US20010053895A1 (en) * 2000-06-15 2001-12-20 Vaillancourt Vincent L. Bloodless catheter
KR200320341Y1 (en) * 2003-04-30 2003-07-22 경기의료공업(주) IV catheter for flowing backward prevention of blood

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4952207A (en) * 1988-07-11 1990-08-28 Critikon, Inc. I.V. catheter with self-locating needle guard
JPH0320341A (en) * 1989-06-16 1991-01-29 Mitsui Mining & Smelting Co Ltd Copper powder for thick film composition
US5599310A (en) * 1995-06-07 1997-02-04 Johnson & Johnson Medical, Inc. I.V. catheter assembly with automatic cannula tip guard
KR20010053895A (en) * 1999-12-02 2001-07-02 박종섭 Method for forming isolation region of semiconductor device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5092845A (en) * 1989-07-10 1992-03-03 Critikon, Inc. Catheter with needle gasket
US5030205A (en) * 1989-12-18 1991-07-09 Critikon, Inc. Catheter assemblies for prevention of blood leakage
US5053014A (en) * 1990-02-01 1991-10-01 Critikon, Inc. Catheter with controlled valve
US20010053895A1 (en) * 2000-06-15 2001-12-20 Vaillancourt Vincent L. Bloodless catheter
KR200320341Y1 (en) * 2003-04-30 2003-07-22 경기의료공업(주) IV catheter for flowing backward prevention of blood

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10143411B2 (en) 2009-07-21 2018-12-04 The General Hospital Corporation Peripheral blood sampling methods and devices
WO2012149109A2 (en) * 2011-04-26 2012-11-01 Devgon Pitamber Systems and methods for phlebotomy through a peripheral iv catheter
US9750446B2 (en) 2011-04-26 2017-09-05 Velano Vascular, Inc. Systems and methods for phlebotomy through a peripheral IV catheter
US11331023B2 (en) 2011-04-26 2022-05-17 Velano Vascular, Inc. Systems and methods for phlebotomy through a peripheral IV catheter
US11191465B2 (en) 2011-04-26 2021-12-07 Velano Vascular, Inc. Systems and methods for phlebotomy through a peripheral IV catheter
US10674950B2 (en) 2011-04-26 2020-06-09 Velano Vascular, Inc. Systems and methods for phlebotomy through a peripheral IV catheter
US10064576B2 (en) 2011-04-26 2018-09-04 Velano Vascular, Inc. Systems and methods for phlebotomy through a peripheral IV catheter
US10076272B2 (en) 2011-04-26 2018-09-18 Velano Vascular, Inc. Systems and methods for phlebotomy through a peripheral IV catheter
US10729367B1 (en) 2011-04-26 2020-08-04 Velano Vascular, Inc. Systems and methods for phlebotomy through a peripheral IV catheter
US9186100B2 (en) 2011-04-26 2015-11-17 Velano Vascular, Inc. Systems and methods for phlebotomy through a peripheral IV catheter
CN103906470A (en) * 2011-04-26 2014-07-02 皮坦贝尔·德夫冈 Systems and methods for phlebotomy through peripheral IV catheter
WO2012149109A3 (en) * 2011-04-26 2014-05-08 Devgon Pitamber Systems and methods for phlebotomy through a peripheral iv catheter
US11957466B2 (en) 2011-04-26 2024-04-16 Velano Vascular, Inc. Systems and methods for phlebotomy through a peripheral IV catheter
US10799167B1 (en) 2011-04-26 2020-10-13 Velano Vascular, Inc. Systems and methods for phlebotomy through a peripheral IV catheter
US11400259B2 (en) 2016-02-03 2022-08-02 Velano Vascular, Inc. Devices and methods for fluid transfer through a placed peripheral intravenous catheter
US11717649B2 (en) 2016-02-03 2023-08-08 Velano Vascular, Inc. Devices and methods for fluid transfer through a placed peripheral intravenous catheter
US10300247B2 (en) 2016-02-03 2019-05-28 Velano Vascular, Inc. Devices and methods for fluid transfer through a placed peripheral intravenous catheter
US9744344B1 (en) 2016-06-30 2017-08-29 Velano Vascular, Inc. Devices and methods for catheter placement within a vein
US10773056B2 (en) 2017-03-21 2020-09-15 Velano Vascular, Inc. Systems and methods for controlling catheter device size
US11351340B2 (en) 2017-03-21 2022-06-07 Velano Vascular, Inc. Systems and methods for controlling catheter device size
US11583661B2 (en) 2017-03-21 2023-02-21 Velano Vascular, Inc. Devices and methods for fluid transfer through a placed peripheral intravenous catheter
US11744990B2 (en) 2017-03-21 2023-09-05 Velano Vascular, Inc. Systems and methods for controlling catheter device size
US11090461B2 (en) 2017-03-21 2021-08-17 Velano Vascular, Inc. Devices and methods for fluid transfer through a placed peripheral intravenous catheter
US11207498B2 (en) 2019-08-20 2021-12-28 Velano Vascular, Inc. Fluid transfer devices with extended length catheters and methods of using the same
US11389624B2 (en) 2020-11-26 2022-07-19 Avia Vascular, Llc Blood collection devices, systems, and methods
US11452847B1 (en) 2020-11-26 2022-09-27 Avia Vascular, Llc Blood collection devices, systems, and methods
US11638806B2 (en) 2020-11-26 2023-05-02 Avia Vascular, Llc Blood collection devices, systems, and methods

Also Published As

Publication number Publication date
KR100843163B1 (en) 2008-07-02

Similar Documents

Publication Publication Date Title
WO2008130077A1 (en) Catheter with blood backflow preventing function
US9408971B2 (en) Self-capping syringe assembly with one-way valve
JP4324973B2 (en) Mixed injection port
CA2960288C (en) Blood sampling system for improving draw success and reducing hemolysis
US5456675A (en) Port cannula arrangement for connection to a port
US5154703A (en) Bloodless catheter
US11534591B2 (en) Systems and methods for facilitating instrument delivery through a peripheral intravenous catheter
US20210228126A1 (en) Integrated intravenous catheter having a side port for facilitating blood draw
CN216366262U (en) Catheter system
US20090247986A1 (en) Flapper Valve with Membrane Bypass for Power PICC
CN204766842U (en) Needleless infusion prevents that needle is kept somewhere to vein against current
CN113950349A (en) Catheter assembly having a valve within a side port of a catheter adapter
JPH025431B2 (en)
CN212630768U (en) Catheter system for facilitating blood collection
CN212788503U (en) Catheter system, blood collection system, and blood collection kit
KR200320341Y1 (en) IV catheter for flowing backward prevention of blood
CN217592872U (en) Needle adapter and blood drawing assembly
US20230256200A1 (en) Vascular Access Blood Draw Device with Integrated Point-of-Care Small Volume Blood Collection Device
CN217409459U (en) Remaining needle convenient for blood sampling and transfusion
US20230210421A1 (en) Integrated Catheter System for Blood Draw at the Time of Placement and with Enabling Feature for Blood Draw During Indwell
JP3525550B2 (en) Fluid dosing or sampling device
JP4552639B2 (en) Medical connector
CN112545506A (en) Blood collection device, system, and blood collection method
KR200201491Y1 (en) Blood vessel needle not using metal giude needle
CN114533055A (en) Blood collection device, system, and blood collection method

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 07793249

Country of ref document: EP

Kind code of ref document: A1

DPE1 Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101)
NENP Non-entry into the national phase

Ref country code: DE

DPE1 Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101)
DPE1 Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101)
122 Ep: pct application non-entry in european phase

Ref document number: 07793249

Country of ref document: EP

Kind code of ref document: A1