Disposable sterile tunnel central venous catheter hemostatic cannula sheath

Abstract

The present application relates to a kind of disposable aseptic tunnel type central venous catheter hemostasis cannula sheath, including cannula sheath, the cannula sheath includes cylindrical sheath tube body, fixed seat on the upper end of sheath tube body, the fixed seat is equipped with left-right symmetrical sliding table, sealing sliding block is installed on sliding table and freely slides, according to need timely sealing the upper port of sheath tube body, prevent blood reflux, sealing sliding block is equipped with sealing diaphragm and connecting head, when sealing sliding block seals the upper port of sheath tube body, corresponding tube body can also pass through sealing diaphragm and enter sheath tube body, the lower end of the sheath tube body is equipped with the tapered guide surface that is contracted to center, two easy-to-tear grooves are provided on the outer circumferential surface of sheath tube body and left-right symmetrical, and the two ends of the easy-to-tear groove extend to the two end surfaces of sheath tube body along the generatrix direction of sheath tube body respectively, easy-to-tear groove facilitates the separation of sheath tube body and central venous catheter.The present application is controllable, easy to remove, and safe and convenient to use.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a disposable sterile tunnel type central venous catheter hemostatic intubation sheath. BACKGROUND

[0002] The central venous catheter belongs to a kind of intravascular tube, which is placed in a large vein. As a kind of clinical commonly used vascular access tool placed in central venous system, the central venous catheter has wide application field. The central venous catheter can be used in clinic to measure central venous pressure, large and rapid intravenous infusion, long-term parenteral nutrition and antitumor chemotherapy vascular access, and blood exchange access when blood purification.

[0003] For medical staff, how to accurately and quickly deliver the central venous catheter to the target blood vessel is a crucial process. The central venous catheter is generally delivered into the target blood vessel by puncture intubation and guide wire exchange. First, a puncture needle is used to pierce the skin and enter the blood vessel, an expander is used to enlarge the puncture port through the puncture needle, and then the puncture needle and the expander are withdrawn, the guide wire is sent into the blood vessel through the intubation sheath, the central venous catheter is sent into the target blood vessel along the guide wire, and finally the guide wire is withdrawn. In the prior art, when the intubation sheath is inserted into the guide wire or the catheter, blood will flow back along the intubation sheath, which requires high skill and speed of the professional personnel, increases the difficulty of catheter implantation, and has safety risks. At the same time, after the central venous catheter is implanted into the blood vessel, the outer end of the central venous catheter is connected with other pipelines or the existence of the self-connection head, which hinders the separation of the intubation sheath, so that the intubation sheath is not easy to separate from the central venous catheter. Therefore, there is an urgent need for an intubation sheath that can solve the above technical problems. SUMMARY

[0004] In order to solve the above problems, the present application provides a disposable sterile tunnel type central venous catheter hemostatic intubation sheath.

[0005] The specific content is as follows: the disposable sterile tunnel type central venous catheter hemostatic intubation sheath comprises an intubation sheath, a sealing sliding block and an expander mounted on the intubation sheath, characterized in that:

[0006] The intubation sheath comprises a cylindrical sheath tube body, a fixed seat fixed on the upper end of the sheath tube body, the fixed seat is provided with left and right symmetrical sliding platforms, the lower end of the sheath tube body is provided with a conical guide surface which is contracted to the center, and two left and right symmetrical easy-to-tear grooves are arranged on the outer circumferential surface of the sheath tube body along the generatrix direction of the sheath tube body, the two ends of the easy-to-tear grooves respectively extend to the two end surfaces of the sheath tube body along the generatrix direction of the sheath tube body;

[0007] The two sides of the sealing slider are provided with front and rear symmetrical side plates which extend downward, and the lower part of the side plates is provided with a positioning strip which protrudes horizontally inward. The sealing slider is placed on the upper surface of one of the sliding tables and the side plates and the positioning strip are clamped on the two sides of the sliding table. The sealing slider forms a sliding pair on the upper surface of the sliding table which can freely slide along the length direction. A U-shaped mounting gap which is vertically penetrated is arranged on the end of the sealing slider which is close to the sheath body. The arc segment of the U-shaped mounting gap is semicircular and the diameter of the semicircular segment is larger than the inner diameter of the sheath body. A sealing diaphragm which horizontally covers the gap is arranged in the U-shaped mounting gap. The sealing diaphragm protrudes downward from the lower surface of the sealing slider and is supported on the upper surface of the sliding table. The sealing diaphragm is provided with a cut seam which extends to the outer edge. A semicircular cylindrical connector is arranged on the upper surface of the sealing slider. The connector is coaxial with the arc segment of the U-shaped mounting gap. Threaded teeth are arranged on the outer circumferential surface of the connector.

[0008] Preferably, the dilator comprises a cylindrical dilator body. A conical cylindrical dilator cone head which is contracted towards the center is arranged on the lower end of the dilator body. A mounting connector is connected to the upper end of the dilator body. A locking nut which is coaxial with the dilator body is arranged on the outside of the mounting connector. The thread on the locking nut matches the threaded teeth on the connector. The outer diameter of the dilator body is the same as the inner diameter of the sheath body and the dilator body is inserted into the sheath body. The locking nut and the connector are located at the same end.

[0009] Preferably, the lower edge of the outer end of the sliding table is provided with a downward protruding limiting stopper.

[0010] Preferably, the upper surface of one of the sliding tables is provided with a positioning baffle which is arranged along the width direction of the sliding table. The positioning baffle is arranged on the two sliding tables together with the sealing slider.

[0011] Preferably, the upper surface of the sliding table on which the positioning baffle is arranged is provided with an anti-skid protrusion.

[0012] Preferably, the upper surface of the sealing slider and the outer side surface of the side plate are both provided with an anti-skid protrusion.

[0013] The beneficial technical effects of the present application are as follows:

[0014] The application is a disposable sterile tunnel type central venous catheter hemostatic intubation sheath, a fixed seat is fixed on the upper end of the sheath tube body, left and right symmetrical sliding tables are arranged on the fixed seat, a sealing sliding block is arranged on one of the sliding tables and freely slides, the upper port of the sheath tube body is sealed in time according to the need, blood reflux is prevented, a sealing diaphragm and a connecting head are arranged on the sealing sliding block, when the sealing sliding block seals the upper port of the sheath tube body, the corresponding tube body can also pass through the sealing diaphragm into the sheath tube body and blood cannot flow back along the sheath tube body, two easy-to-tear grooves are arranged on the outer circumferential surface of the sheath tube body, when the central venous catheter is implanted into the target blood vessel through the sheath tube body, the sheath tube body can be torn into two halves along the easy-to-tear grooves, so that the sheath tube body can be separated from the central venous catheter. The sealing controllability of the application is good, human blood cannot flow back along the sheath tube body, the sheath tube body is easy to remove, and the application is safe and convenient to use. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a perspective structural schematic view of the disposable sterile tunnel type central venous catheter hemostatic intubation sheath;

[0016] Figure 2 It is a perspective structural schematic view of the expander combined with the disposable sterile tunnel type central venous catheter hemostatic intubation sheath;

[0017] Figure 3 It is a perspective structural schematic view of the intubation sheath;

[0018] Figure 4 It is a perspective structural schematic view of the sealing sliding block Figure 1 ;

[0019] Figure 5 It is a perspective structural schematic view of the sealing sliding block Figure 2 ;

[0020] Figure 6 It is a perspective structural schematic view of the expander;

[0021] In the drawing: 11. sheath tube body, 12. easy-to-tear groove, 13. guide surface, 14. fixed seat, 15. sliding table, 16. positioning baffle, 17. limiting baffle, 18. anti-skid convex A, 21. sealing sliding block, 22. connecting head, 23. sealing diaphragm, 24. side plate, 25. threaded tooth, 26. anti-skid convex B, 27. cutting seam, 28. U-shaped installation gap, 29. positioning strip, 31. expansion tube body, 32. expansion cone head, 33. locking nut, 34. installation connector. DETAILED DESCRIPTION

[0022] Example one, see Figures 1-6 The disposable sterile tunnel type central venous catheter hemostatic intubation sheath comprises an intubation sheath, a sealing sliding block and an expander which are installed on the intubation sheath;

[0023] The cannula sheath comprises a cylindrical sheath body, a fixed seat fixed on the upper end of the sheath body, and left and right symmetrical sliding platforms arranged on the fixed seat.

[0024] The two sides of the sealing sliding block are provided with front and rear symmetrical side plates extending downward, and a positioning strip protruding inward horizontally is arranged on the lower part of the side plate.

[0025] The expansion device comprises a cylindrical expansion tube body, a conical cylindrical expansion cone head arranged at the lower end of the expansion tube body, and a mounting connector connected to the upper end of the expansion tube body.

[0026] The outer end lower edge of the sliding platform is provided with a downward protruding limiting block to prevent the sealing sliding block from slipping off.

[0027] The upper surface of one of the sliding platforms is provided with a positioning baffle arranged along the width direction thereof.

[0028] The upper surface of the sliding platform where the positioning baffle is arranged is provided with an anti-skid protrusion.

[0029] The use process and principle of the present application are as follows.

[0030] The sealing slide is slid to the center to make the connector coaxial with the sheath body, the expansion cone of the expansion tube of the expander is inserted into the sheath body through the sealing diaphragm, the locking nut is screwed on the connector to make the expander relatively fixed with the sheath body, the expansion cone of the expansion tube extends out of the lower end of the sheath body, then the puncture needle is used to pierce the skin to enter the blood vessel, the puncture hole is enlarged by the expansion cone of the expander through the puncture needle and the cannula sheath is inserted in sequence, then the puncture needle and the expander are withdrawn, the lower end of the cannula sheath remains in the blood vessel, at this time, the blood cannot flow out along the sheath body under the action of the sealing diaphragm, the guide wire is sent into the blood vessel through the cannula sheath, the central venous catheter is sent into the target blood vessel along the guide wire, finally, the guide wire and the sheath body are withdrawn, at the same time, the sealing slide is slid outward, the central venous catheter is withdrawn along the incision of the sealing diaphragm, the sheath body is torn into two halves along the easy-to-tear groove, and the sheath body is completely separated from the central venous catheter.

Claims

1. A disposable sterile tunnel central venous catheter hemostatic cannula sheath, comprising a cannula sheath, a sealing slider mounted on the cannula sheath and a dilator, characterized in that: the cannula sheath comprises a cylindrical sheath body, a fixed seat fixed on the upper end of the sheath body, the fixed seat is provided with left and right symmetrical sliding platforms, the lower end of the sheath body is provided with a conical guide surface which is contracted to the center, and two easy-to-tear grooves which are symmetrical to the left and right and along the generatrix direction of the sheath body are arranged on the outer circumferential surface of the sheath body, and the two ends of the easy-to-tear grooves respectively extend to the two end surfaces of the sheath body along the generatrix direction of the sheath body; the sealing slider is provided with front and rear symmetrical side plates which extend downward, and a positioning strip which protrudes inward horizontally is arranged on the lower part of the side plate, the sealing slider is placed on the upper surface of one of the sliding platforms and the side plates and the positioning strip are clamped on the two sides of the sliding platform, the sealing slider forms a sliding pair which freely slides along the length direction of the sliding platform on the upper surface of the sliding platform, a vertical U-shaped mounting gap is arranged on the end of the sealing slider close to the sheath body, the arc segment of the U-shaped mounting gap is semicircular and the diameter of the semicircular segment is greater than the inner diameter of the sheath body, a sealing diaphragm which covers the gap horizontally is arranged in the U-shaped mounting gap, the sealing diaphragm protrudes downward from the lower surface of the sealing slider and is supported on the upper surface of the sliding platform, a cut seam which extends to the outer edge is arranged on the sealing diaphragm, and a semicylindrical connector is arranged on the upper surface of the sealing slider, the semicylindrical connector is coaxial with the arc segment of the U-shaped mounting gap, and a screw thread is arranged on the outer circumferential surface of the connector. the dilator comprises a cylindrical dilator body, a dilator cone which is conical and contracts to the center is arranged on the lower end of the dilator body, a mounting connector is connected to the upper end of the dilator body, a locking nut which is coaxial with the dilator body is arranged on the outside of the mounting connector, the screw thread on the locking nut matches the screw thread on the connector, the outer diameter of the dilator body is the same as the inner diameter of the sheath body and the dilator body is inserted into the sheath body, and the locking nut and the connector are located at the same end.

2. The hemostatic introducer sheath of claim 1, wherein: a limiting stopper which protrudes downward is arranged on the outer end lower edge of the sliding platform.

3. The hemostatic introducer sheath of claim 1, wherein: a positioning baffle which is arranged along the width direction of the sliding platform is arranged on the upper surface of the sliding platform, and the positioning baffle and the sealing slider are respectively arranged on the two sliding platforms.

4. The hemostatic introducer sheath of claim 1, wherein one of a non-slip protrusion A is arranged on the upper surface of the sliding platform where the positioning baffle is arranged.

5. The hemostatic introducer sheath of claim 4, wherein: a non-slip protrusion B is arranged on the outer side surface of the sealing slider.

6. The hemostatic introducer sheath of claim 1, wherein: ​

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