Sheath tube based on efficient sealing hemostasis valve

Abstract

The sheath tube based on the efficient sealing hemostasis valve comprises a sheath tube body and the hemostasis valve, and the hemostasis valve comprises a shell and a protruding seat connected with the shell. The sheathing canal is provided with the two elastic plugs and the two annular bag parts, and therefore the catheter inserted into the sheathing canal and the dilator can be better sealed. And a space where hydraulic oil is located is arranged, so that when the instrument exits, the hemostasis valve can be quickly sealed, and air is prevented from entering the hemostasis valve.

Description

Technical Field

[0001] The present invention relates to the technical field of sheath tubes, and more specifically, to a sheath tube based on an efficient sealing hemostatic valve. Background Art

[0002] Sheath tubes are common surgical instruments in medical interventional treatments. Sheath tubes are used to establish a stable working passage after puncturing a blood vessel or tissue, facilitating the delivery of interventional instruments such as catheters and guidewires. Traditional sheath tubes usually consist of components such as a tubular body and a hemostatic valve.

[0003] During the working process of the sheath tube, it is necessary to first puncture, insert a guidewire at the puncture point, then send the whole assembly of the sheath tube and the dilator along the guidewire into the blood vessel, then withdraw the dilator, and insert a catheter along the sheath tube for corresponding operations. Among them, the hemostatic valve relies on an elastic membrane structure to dynamically seal the lumen when instruments enter and exit, preventing blood from overflowing or air from entering. When the instrument exits the elastic membrane structure, especially when the dilator exits the elastic membrane structure, it takes time for the membrane to resume sealing, so there is a very short period of time during which the sealing effect of the hemostatic valve is not good, thus it is easy to leak air, allowing air to enter the sheath tube and generating air embolisms. Summary of the Invention

[0004] The present invention aims to overcome the defects of the prior art and provides a sheath tube based on an efficient sealing hemostatic valve.

[0005] To achieve the above object, the present invention provides the following technical solution: A sheath tube, comprising a sheath tube body and a hemostatic valve. The hemostatic valve includes a housing and a protruding seat connected to the housing. The housing has a first groove, a second groove, a slot, a first channel connecting the first groove and the slot, a second channel connecting the second groove and the slot, and a perforation communicating with the slot. The protruding seat has a first piston chamber communicating with the perforation and a through-hole portion communicating with the first piston chamber. A sealing ring is installed at the through-hole portion. A first piston is disposed in the first piston chamber. The first piston is connected to a plug plate through a push rod passing through the perforation. The plug plate has a circular through-hole. A spring is connected between the plug plate and the slot. The first piston is connected to a movable tube. The movable tube has a second piston chamber and a threaded channel communicating with the second piston chamber. A second piston is installed in the second piston chamber. A screw rod connected to the second piston and capable of rotating relative to the second piston is installed in the threaded channel. A communication hole communicating with the first piston chamber is provided at the second piston chamber. A first elastic plug is installed in the first groove. A first annular bladder is installed between the first elastic plug and the end of the first groove close to the first channel. A second elastic plug is installed in the second groove. A second annular bladder is installed between the second elastic plug and the end of the second groove close to the second channel. The first piston chamber is connected to an indicating tube through a first connecting tube. The indicating tube is connected to the housing and the indicating tube communicates with the first annular bladder. The second piston chamber communicates with the second annular bladder through a second connecting tube. The indicating tube is a transparent tube. An annular indicating unit is disposed in the indicating tube. The annular indicating unit is connected to the inner side wall of the transparent tube through a plurality of elastic ropes.

[0006] Further, the lengths of the plurality of elastic ropes are equal.

[0007] Further, the second piston is connected to a rotating block. The end of the screw rod has an annular sliding groove cooperating with the rotating block.

[0008] Further, the movable tube can translate relative to the sealing ring and maintain sealing during translation.

[0009] Further, the housing has a first channel portion communicating the indicating tube and the first annular bladder and a second channel portion communicating the second connecting tube and the second annular bladder.

[0010] Further, both the first channel and the second channel are cylindrical channels.

[0011] Further, when the end of the plug plate away from the perforation abuts against the end of the slot away from the perforation, the axes of the first channel, the second channel, and the circular through-hole are collinear.

[0012] Further, when there is no external force, under the action of the spring, the end of the plug plate close to the perforation abuts against the end of the slot close to the perforation.

[0013] Furthermore, a knob is fixedly connected to the end of the screw rod.

[0014] Thus, by rotating the knob, the second piston can be driven to translate in the second piston cavity. And by pressing, the insertion plate can be driven to translate in the slot.

[0015] Furthermore, a plurality of elastic drawstrings are distributed at equal intervals in a ring shape; the first piston cavity, the second piston cavity, the first connecting pipe, the second connecting pipe, the indicating pipe, the first annular sac part and the second annular sac part form the space where the hydraulic oil is located, and transparent hydraulic oil is accommodated in the space where the hydraulic oil is located.

[0016] Furthermore, the annular indicating unit is an annular rubber block.

[0017] Furthermore, the diameter of the circular through hole is greater than or equal to the diameter of the first channel, and the diameter of the first channel is equal to the diameter of the second channel.

[0018] Furthermore, the insertion plate includes a rectangular part and a semi-circular part connected to the rectangular part.

[0019] Furthermore, the slot includes a rectangular part and a semi-circular part connected to the rectangular part.

[0020] Furthermore, a first blind hole is provided in the slot, a second blind hole is provided in the insertion plate, and one end of the spring is connected to the closed end of the first blind hole, and the other end is connected to the closed end of the second blind hole.

[0021] Furthermore, there are two first blind holes at the slot, two second blind holes at the insertion plate, and two springs.

[0022] Furthermore, a plurality of rollers are installed on the inner side wall of the circular through hole and are distributed at equal intervals in a ring shape.

[0023] Furthermore, there are eight rollers.

[0024] Thus, when instruments such as catheters and dilators move relative to the circular through hole, the friction is smaller.

[0025] Furthermore, the indicating pipe is cylindrical.

[0026] Furthermore, the annular indicating unit is circular.

[0027] Furthermore, the annular indicating unit is red or black.

[0028] Furthermore, the inner diameter of the indicating pipe is greater than the diameter of the annular indicating unit.

[0029] Further, the first elastic plug has a first incision, and the second elastic plug has a second incision; the first incision is cross-shaped, and the second incision is linear-shaped.

[0030] Further, the housing further includes a connection cavity communicating with the second groove and an installation cavity connected to the connection cavity. The connection cavity is frustum-shaped, and the end of the sheath tube body is fixed in the installation cavity.

[0031] Further, the housing includes a first cylindrical portion, a frustum-shaped portion connected to the first cylindrical portion, and a second cylindrical portion connected to the frustum-shaped portion.

[0032] Further, a side tube is connected to the second cylindrical portion.

[0033] Further, the side tube is connected to a three-way valve through a flexible tube.

[0034] Thus, operations such as liquid injection and pressure relief can be performed through the side tube.

[0035] Further, the length of the first elastic plug along the axis of the housing is equal to the length of the second elastic plug along the axis of the housing.

[0036] Further, the length of the first annular sac portion along the axis of the housing is equal to the length of the second annular sac portion along the axis of the housing.

[0037] Further, the length of the first annular sac portion along the axis of the housing is greater than the length of the first elastic plug along the axis of the housing.

[0038] Advantageous Effects:

[0039] 1. The sheath tube of the present application has two elastic plugs and two annular sac portions, thus achieving better sealing for the catheter and dilator inserted into the sheath tube.

[0040] 2. The sheath tube of the present application is provided with a space for hydraulic oil, so that when the instrument is withdrawn, the hemostatic valve can achieve rapid sealing, thereby preventing air from entering. Description of the Drawings

[0041] Figure 1 Schematic diagram before preparing to withdraw the dilator; Figure 2 Enlarged view of area A; Figure 3 Enlarged view of area B; Figure 4 Schematic diagram of increasing the volume in the second piston cavity by rotating the knob; Figure 5 Enlarged view of area C; Figure 6 Schematic diagram of withdrawing the dilator from the second elastic plug and the second annular sac portion; Figure 7 Schematic diagram of the expander exiting the circular through-hole Figure 8 Enlarged view of area D Figure 9 Schematic diagram of the expander exiting the first annular sac and the first elastic plug Figure 10 Enlarged view of area E Figure 11 Schematic diagram of the hemostatic valve Figure 12 Schematic diagram of the first perspective of the separation of the hemostatic valve components Figure 13 Enlarged view of area F Figure 14 Schematic diagram of the second perspective of the separation of the hemostatic valve components

[0042] For clarity of illustration, Figures 1-9 showing a cross-sectional schematic diagram, Figures 1-14 the sheath body and the expander are not drawn.

[0043] Explanation of reference numerals: housing 1; first channel 1.1; second channel 1.2; perforation 1.3; first blind hole 1.4; connection cavity 1.5; installation cavity 1.6; first cylindrical portion 1.7; frustoconical portion 1.8; second cylindrical portion 1.9; protruding seat 2; first connecting pipe 2.1; sealing ring 3; first piston 4; push rod 4.1; plug 5; circular through-hole 5.1; spring 5.2; second blind hole 5.3; roller 5.4; movable pipe 6; second piston cavity 6.1; threaded channel 6.2; communication hole 6.3; second piston 7; screw rod 8; knob 8.1; first elastic plug 9; first notch 9.1; first annular sac 10; second elastic plug 11; second notch 11.1; second annular sac 12; indicating pipe 13; annular indicating unit 13.1; elastic pull cord 13.2; second connecting pipe 14; side pipe 15. Detailed implementation manners

[0044] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation to the present invention.

[0045] The present invention provides a sheath tube based on an efficient sealing hemostatic valve as shown in the figure, comprising a sheath tube body and a hemostatic valve. The hemostatic valve includes a housing 1 and a protruding seat 2 connected to the housing 1. The housing 1 has a first groove, a second groove, a slot, a first channel 1.1 connecting the first groove and the slot, a second channel 1.2 connecting the second groove and the slot, and a perforation 1.3 communicating with the slot. The protruding seat 2 has a first piston chamber communicating with the perforation 1.3 and a through-hole portion communicating with the first piston chamber. A sealing ring 3 is installed at the through-hole portion. A first piston 4 is disposed in the first piston chamber. The first piston 4 is connected to a plug plate 5 through a push rod 4.1 passing through the perforation 1.3. The plug plate 5 has a circular through-hole 5.1. A spring 5.2 is connected between the plug plate 5 and the slot. The first piston 4 is connected to a movable tube 6. The movable tube 6 has a second piston chamber 6.1 and a threaded channel 6.2 communicating with the second piston chamber 6.1. A second piston 7 is installed in the second piston chamber 6.1. A screw rod 8 connected to the second piston 7 and capable of rotating relative to the second piston 7 is installed in the threaded channel 6.2. A communication hole 6.3 communicating with the first piston chamber is provided at the second piston chamber 6.1. A first elastic plug 9 is installed in the first groove. A first annular bladder portion 10 is installed between the first elastic plug 9 and the end of the first groove close to the first channel 1.1. A second elastic plug 11 is installed in the second groove. A second annular bladder portion 12 is installed between the second elastic plug 11 and the end of the second groove close to the second channel 1.2. The first piston chamber is connected to an indicating tube 13 through a first connecting tube 2.1. The indicating tube 13 is connected to the housing 1 and the indicating tube 13 communicates with the first annular bladder portion 10. The second piston chamber 6.1 is communicated with the second annular bladder portion 12 through a second connecting tube 14. The indicating tube 13 is a transparent tube. An annular indicating unit 13.1 is disposed in the indicating tube 13. The annular indicating unit 13.1 is connected to the inner sidewall of the transparent tube through a plurality of elastic draw cords 13.2.

[0046] The end of the screw rod 8 is fixedly connected with a knob 8.1. A plurality of elastic pull ropes 13.2 are distributed in an annular manner at equal intervals; the first piston chamber, the second piston chamber 6.1, the first connecting pipe 2.1, the second connecting pipe 14, the indicating pipe 13, the first annular capsule 10 and the second annular capsule 12 form a space where the hydraulic oil is located, and the space where the hydraulic oil is located contains transparent hydraulic oil; the annular indicating unit 13.1 is an annular rubber block. The diameter of the circular through hole 5.1 is greater than or equal to the diameter of the first channel 1.1, and the diameter of the first channel 1.1 is equal to the diameter of the second channel 1.2; the plug plate 5 includes a rectangular part and a semicircular part connected to the rectangular part; the slot includes a rectangular part and a semicircular part connected to the rectangular part; the slot has a first blind hole 1.4, the plug plate 5 has a second blind hole 5.3, one end of the spring 5.2 is connected to the closed end of the first blind hole 1.4, and the other end is connected to the closed end of the second blind hole 5.3. There are two springs 5.2. The inner wall of the circular through hole 5.1 is provided with a plurality of rollers 5.4 distributed in an annular shape and at equal intervals. The first elastic plug 9 has a first cutout 9.1, and the second elastic plug 11 has a second cutout 11.1; the first cutout 9.1 is in a cross shape, and the second cutout 11.1 is in a straight line shape. The housing 1 further includes a connecting cavity 1.5 communicating with the second groove and an installation cavity 1.6 connected to the connecting cavity, the connecting cavity 1.5 being in a frustum shape, and the end of the sheath body being fixed in the installation cavity 1.6. The shell 1 includes a first cylindrical part 1.7, a frustoconical part 1.8 connected to the first cylindrical part 1.7, and a second cylindrical part 1.9 connected to the frustoconical part 1.8; the second cylindrical part 1.9 is connected to a side tube 15; the length of the first elastic plug 9 along the axis of the shell 1 is equal to the length of the second elastic plug 11 along the axis of the shell 1; the length of the first annular bag portion 10 along the axis of the shell 1 is equal to the length of the second annular bag portion 12 along the axis of the shell 1, and the length of the first annular bag portion 10 along the axis of the shell 1 is greater than the length of the first elastic plug 9 along the axis of the shell 1.

[0047] Working principle: When the sheath of this application is operated, Figure 1 As shown, at this time, the expander is located in the sheath, the first elastic plug, the first annular capsule, the second annular capsule and the second elastic plug are all expanded by the expander, and the expander passes through the circular through hole of the plug plate, and at this time, the hydraulic oil in the second piston cavity is pressed into the first annular capsule and the second annular capsule, so that the first annular capsule and the second annular capsule abut the expander more tightly, thereby achieving better sealing. When it is necessary to withdraw the expander, as shown in FIG. Figure 4As shown, by rotating the knob, the space in the second piston chamber becomes larger, so that a part of the hydraulic oil between the first annular sac and the second annular sac enters the second piston chamber, so that the abutting force of the first annular sac and the second annular sac on the dilator becomes smaller, thus facilitating the withdrawal of the dilator. Then, as Figure 6 shown, the front end of the dilator withdraws from the second elastic plug and the second annular sac, the second elastic plug gradually resumes sealing, and under the pressure of the hydraulic oil (part of the hydraulic oil flows from the first annular sac into the second annular sac, and the flow of the hydraulic oil will impact the annular indicating unit, so that the annular indicating unit moves towards the direction of the first connecting pipe, and will reset under the action of the elastic rope after moving), the second annular sac also resumes a certain degree of sealing. Then, as Figure 7 shown, as the dilator continues to withdraw (the setting of the roller makes the friction smaller when the instrument moves in the circular through hole), the plug board will move rapidly towards the direction close to the perforation under the action of the spring, so that the volume in the first piston chamber becomes smaller, so that more hydraulic oil is pressed towards the first annular sac and the second annular sac (when the hydraulic oil moves towards the first annular sac, it will drive the annular indicating unit to move away from the first connecting pipe), so that the self-sealing effect of the second annular sac is better, so that the second annular sac achieves good sealing and prevents air from entering. Then, as Figure 9 shown, the dilator can withdraw from the first annular sac and the first elastic plug.

[0048] When the dilator withdraws, it withdraws from the second elastic plug, the second annular sac, the circular through hole of the plug board, the first annular sac and the first elastic plug in sequence. Due to the setting of the indicating pipe, when the dilator withdraws from the second annular sac, the annular indicating unit moves towards the direction close to the first connecting pipe, so that the operator knows that the distal end of the dilator has withdrawn from the second annular sac, thus reminding the operator to pause the operation of withdrawing the dilator for 1 - 2 seconds slightly, so as to leave time for the second elastic plug and the second annular sac to resume sealing. When the annular indicating unit moves away from the first connecting pipe, the operator knows that the plug board has moved smoothly towards the direction close to the perforation under the action of the spring, so that the second annular sac has achieved better sealing, so that the operator can safely withdraw the dilator from the first annular sac and the first elastic plug.

[0049] Although the present invention has been illustrated and described with respect to the preferred embodiments, those skilled in the art should understand that various changes and modifications can be made to the present invention as long as they do not exceed the scope defined by the claims of the present invention.

Claims

1. A sheath tube based on an efficient sealed hemostatic valve, characterized in that Comprising a sheath tube body and a hemostatic valve, the hemostatic valve includes a housing and a protruding seat connected to the housing. The housing has a first groove, a second groove, a slot, a first channel connecting the first groove and the slot, a second channel connecting the second groove and the slot, and a perforation communicating with the slot. The protruding seat has a first piston chamber communicating with the perforation and a through-hole portion communicating with the first piston chamber. A sealing ring is installed at the through-hole portion. A first piston is disposed in the first piston chamber. The first piston is connected to a plug plate through a push rod passing through the perforation. The plug plate has a circular through-hole. A spring is connected between the plug plate and the slot. The first piston is connected to a movable tube. The movable tube has a second piston chamber and a threaded channel communicating with the second piston chamber. A second piston is installed in the second piston chamber. A screw rod connected to the second piston and capable of rotating relative to the second piston is installed in the threaded channel. A communication hole communicating with the first piston chamber is provided at the second piston chamber. A first elastic plug is installed in the first groove. A first annular bladder is installed between the first elastic plug and the end of the first groove close to the first channel. A second elastic plug is installed in the second groove. A second annular bladder is installed between the second elastic plug and the end of the second groove close to the second channel. The first piston chamber is connected to an indicating tube through a first connecting tube. The indicating tube is connected to the housing and the indicating tube communicates with the first annular bladder. The second piston chamber is communicated with the second annular bladder through a second connecting tube. The indicating tube is a transparent tube. An annular indicating unit is disposed in the indicating tube. The annular indicating unit is connected to the inner sidewall of the transparent tube through a plurality of elastic draw ropes.

2. The sheath tube based on the highly efficient sealing hemostatic valve according to claim 1, characterized in that, The end of the screw rod is fixedly connected with a knob.

3. The sheath tube based on the highly efficient sealed hemostatic valve according to claim 1, characterized in that, The plurality of elastic draw ropes are annularly and equidistantly distributed. The first piston chamber, the second piston chamber, the first connecting tube, the second connecting tube, the indicating tube, the first annular bladder and the second annular bladder form a space where hydraulic oil is located. The space where the hydraulic oil is located accommodates transparent hydraulic oil. The annular indicating unit is an annular rubber block.

4. The sheath tube based on the highly efficient sealed hemostatic valve according to claim 1, characterized in that, The diameter of the circular through-hole is greater than or equal to the diameter of the first channel. The diameter of the first channel is equal to the diameter of the second channel. The plug plate includes a rectangular portion and a semi-circular portion connected to the rectangular portion. The slot includes a rectangular portion and a semi-circular portion connected to the rectangular portion. A first blind hole is provided in the slot. The plug plate has a second blind hole. One end of the spring is connected to the closed end of the first blind hole, and the other end is connected to the closed end of the second blind hole.

5. The sheath tube based on the highly efficient sealing hemostatic valve according to claim 1, wherein A plurality of rollers are annularly and equidistantly installed on the inner sidewall of the circular through-hole.

6. The sheath tube based on the highly efficient sealing hemostatic valve according to claim 1, wherein, The first elastic plug has a first cut. The second elastic plug has a second cut. The first cut is cross-shaped. The second cut is linear.

7. The sheath tube based on the high-efficiency sealed hemostatic valve according to claim 1, characterized in that, The housing further includes a connection cavity communicating with the second groove and an installation cavity connected to the connection cavity. The connection cavity is frustum-shaped. The end of the sheath tube body is fixed in the installation cavity.

8. The sheath tube based on the highly efficient sealing hemostatic valve according to claim 1, characterized in that, The housing includes a first cylindrical portion, a frustum-shaped portion connected to the first cylindrical portion, and a second cylindrical portion connected to the frustum-shaped portion; a side tube is connected to the second cylindrical portion; the length of the first elastic plug along the axis of the housing is equal to the length of the second elastic plug along the axis of the housing; the length of the first annular bladder portion along the axis of the housing is equal to the length of the second annular bladder portion along the axis of the housing, and the length of the first annular bladder portion along the axis of the housing is greater than the length of the first elastic plug along the axis of the housing.

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