CN109550104B - Vein catheter device capable of plugging - Google Patents
Vein catheter device capable of plugging Download PDFInfo
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- CN109550104B CN109550104B CN201910076863.XA CN201910076863A CN109550104B CN 109550104 B CN109550104 B CN 109550104B CN 201910076863 A CN201910076863 A CN 201910076863A CN 109550104 B CN109550104 B CN 109550104B
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- intravenous catheter
- wire
- guide passage
- inner cavity
- catheter
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- 238000001990 intravenous administration Methods 0.000 claims abstract description 121
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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
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
-
- 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
- A61M25/0021—Catheters; Hollow probes characterised by the form of the tubing
-
- 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
- A61M25/0043—Catheters; Hollow probes characterised by structural features
-
- 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
- A61M25/09—Guide wires
Abstract
A closable intravenous catheter device comprising: needle tube, needle tube seat, venous catheter and venous catheter seat; the needle tube passes through the sealing body, the front part of the needle tube is positioned in the inner cavity of the intravenous catheter, and the front end of the needle tube is exposed from the front end opening of the intravenous catheter; and an elongated movable blocking wire; an isolation member for isolating a part or all of the blocking filaments from the outside; the guide passage and the shell assembly are also included, and at least the front end of the guide passage is in a straight tube shape; the front end opening of the guide passage is communicated with the inner cavity of the intravenous catheter directly or through the inner cavity of the intravenous catheter seat, and the blocking wire can penetrate through the guide passage to enter the inner cavity of the intravenous catheter; the guide passage at least has a straight tubular portion and the intravenous catheter capable of being rotated and moved to a position where the central axis of the guide passage coincides with the central axis of the intravenous catheter; the plugging wire and the guide passage which can be in direct contact with the inner cavity of the intravenous catheter seat or be in fluid communication with each other are isolated from the outside; the shell assembly is connected with the guide passage, and the plugging wire and the isolation part are at least partially and conformally positioned in the shell assembly.
Description
Technical Field
The invention relates to a plugging intravenous catheter device, which belongs to the technical field of medical appliances.
Background
Venipuncture and associated intravenous infusion are the most commonly used general technique in clinical departments, and when infusion time is long, a flexible intravenous catheter is most commonly used to be remained in a vein lumen, and the risk of puncturing a vein by the front end of a rigid needle tube during the retention period is eliminated; however, in the indwelling period without liquid medicine injection, blood coagulation is easily caused by slow local blood flow or blood stagnation in the intravenous catheter and the opening, and even if measures such as heparin and other anticoagulant sealing tubes, physiological saline flushing tubes and the like are used, thrombus can not be completely eradicated from forming in the inner cavity of the intravenous catheter, and the acute pulmonary embolism is caused by the falling of the thrombus, so that the life is endangered.
When the limb activity of the patient is significant, blood is very likely to enter the lumen of the intravenous catheter, further accelerating thrombus formation.
Even if the lumen of the intravenous catheter is not thrombosed, wall built-up thrombus or fibrin sheath extending along the outer surface of the catheter can be formed at the opening of the catheter due to slow or stagnant local blood flow, which not only blocks the lumen of the intravenous catheter but also causes thrombosis on the adjacent intravenous membrane.
Patent application 201810470421.9 proposes to block the front end opening of the intravenous catheter by the blocking wire which is isolated from the outside, and to smoothly enter the inner cavity of the intravenous catheter by the guiding auxiliary blocking wire, but the blocking wire advances to a free state between the opening of the guiding passage and the rear end opening of the inner cavity of the intravenous catheter and has no coaxial guiding structure, so that the blocking wire is difficult to easily enter the inner cavity of the intravenous catheter.
Disclosure of Invention
The present invention provides a closable intravenous catheter device in order to solve the above-mentioned problems.
The purpose of the invention is realized in the following way:
a closable intravenous catheter device comprising: a needle tube for puncturing skin and vein wall, a needle tube seat for fixing the bottom of the needle tube therein; the venous catheter is connected with the venous catheter seat in a sealing way; the needle tube passes through the sealing body on the venous catheter seat, the front part of the needle tube is positioned in the inner cavity of the venous catheter, and the front end of the needle tube is exposed from the front end opening of the venous catheter; and an elongated movable blocking wire; an isolation member for isolating a part or all of the blocking filaments from the outside; the guide passage is provided with at least a straight pipe-shaped part at the front end; the front end opening of the guide passage is communicated with the inner cavity of the intravenous catheter directly or through the inner cavity of the intravenous catheter seat, and the blocking wire can penetrate through the guide passage to enter the inner cavity of the intravenous catheter; the guide passage at least has a straight tubular portion and the intravenous catheter capable of being rotated and moved to a position where the central axis of the guide passage coincides with the central axis of the intravenous catheter; the plugging wire and the guide passage which can be in direct contact with the inner cavity of the intravenous catheter seat or be in fluid communication with each other are isolated from the outside; and a housing assembly coupled to the guide channel, the seal wire and the spacer member being at least partially conformally positioned within the housing assembly.
The whole shell component is in a strip shape, a disc shape and the like, can be formed by connecting a plurality of parts, and is internally provided with structures for accommodating, driving and guiding the plugging wires and isolating parts, such as corresponding grooves and the like.
The function of the venous catheter means that the venous catheter not only can be filled with fluids such as sterile water, liquid medicine, blood and the like, but also can be used for drawing out the body fluids such as venous blood, arterial blood, cerebrospinal fluid and pleural effusion for inspection, and the venous catheter is a bidirectional passage for entering and exiting the cavities of human body such as veins, arteries, pleural cavities, subarachnoid cavities, abdominal cavities and the like.
The guide passage can be directly formed by a through hole penetrating through the sealing body; or a hollow passage part passes through the sealing body and/or the venous catheter seat, and the inner cavity of the passage part is a guide passage; the guide passage may be constituted by a passage in the sealing body and a passage in the other member.
The whole sealing body is cylindrical, bar-shaped and the like and is in shape fit with the venous catheter seat, and is made of a deformable elastic material or a hard material which is not easy to deform; the sealing body can also be formed by an elastic part which is sealed with the intravenous catheter seat and is easy to deform and a hard part containing a guide passage; the device also can be formed by a hard part which is sealed with the intravenous catheter seat and is not easy to deform and an elastic part which contains a guide passage and is easy to deform; the sealing body can be completely made of hard materials and can be in rotatable sealing connection with the venous catheter seat, or the elastic sealing ring is arranged outside the hard main body and can be in rotatable sealing connection with the venous catheter seat, and the cross section shape is preferably round, or can be similar to a round shape or a polygon shape.
To facilitate entry of the occlusion wire into the lumen of the intravenous catheter, at least a portion of the guide channel may extend into the lumen of the intravenous catheter hub, even to the vicinity of the rear end opening of the intravenous catheter.
The blocking wire and the guide passage can be in direct contact with the fluid in the inner cavity of the intravenous catheter seat when static or relatively moving, and the fluid in the inner cavity of the intravenous catheter seat overflows through the gap between the guide passage and the blocking wire and is in contact with the blocking wire and the guide passage, so that the fluid is communicated.
The inner surface of the guide passage can be provided with a protrusion and/or a recess for preventing fluid from overflowing when the plugging wire is stationary or axially moving, and the protrusion and/or the recess form transition fit with the outer surface of the plugging wire, so that gas is allowed to pass through and fluid is not allowed to pass through; it forms an interference fit with the outer surface of the occlusion filament, allowing neither fluid nor gas to pass.
The isolation component can be a deformable capsule structure extending from the sealing body; or a hollow thin-wall flexible isolation part which is easy to deform under the stress and can comprise a tubular shape, a sleeve shape, a disc shape, a blade shape, a butterfly wing shape and a paddle shape; or a hollow hard isolation part which is hard to deform under the stress and can comprise a tubular shape, a disc shape, a blade shape, a butterfly wing shape and a paddle shape; or the hollow thin-wall flexible part which is easy to deform under the stress and the hollow hard part which is difficult to deform under the stress form a separation part which can be sealed from outside and comprises a tubular shape, a sleeve shape, a disc shape, a blade shape, a butterfly wing shape and a paddle shape; the lumen may be in communication with the portion of the intravenous catheter hub lumen that contacts the infusion fluid via the guide channel.
After the needle tube is separated from the intravenous catheter or completely withdrawn, the restriction of the needle tube on the rotation motion of at least the straight tubular part of the guide passage is released, so that the central axis of at least the straight tubular part of the guide passage can move to the position where the central axes of the intravenous catheter coincide, namely that the needle tube and the guide passage are collinear and coaxial, and the plugging wire can more easily enter the front end of the intravenous catheter through the guide passage and the inner cavity of the intravenous catheter seat.
After the central axis positions coincide, the slender plugging wire which protrudes out of the front end opening of the guide passage is easier to enter the inner cavity of the intravenous catheter, and finally the front end opening of the intravenous catheter is plugged.
The guide passage may be entirely straight, or may be connected to other straight portions at an angle or curved portions.
The infusion connecting tube can be connected with the intravenous catheter seat so that the inner cavity of the infusion connecting tube can be communicated with the inner cavity of the intravenous catheter seat.
In order to make the front end opening of the guide passage closer to the rear end opening of the intravenous catheter, the guide effect is more reliable, and the straight tubular guide passage or the straight tubular part of the guide passage can axially move towards the intravenous catheter in an external isolation way.
The rotation mode is that the sealing body or the part connected with the guide passage is connected with the intravenous catheter seat in a relatively rotatable way, and the rotation axis of the sealing body is parallel to the central axis of the intravenous catheter; the perpendicular distance between the central axis of the guide way and the rotation axis is equal to the perpendicular distance between the central axis of the intravenous catheter and the rotation axis.
For better rotation, the sealing body can be connected with a rotating handle, and the venous catheter seat is provided with a limiting structure and/or a guiding structure matched with the rotating handle.
In order to avoid bending of the blocking wire during the advancing process, the length of the straight tubular portion of the guide path is greater than or equal to the distance between the front end opening thereof and the rear end opening of the intravenous catheter.
In order to ensure that the plugging wire is not easy to advance in the inner cavity of the intravenous catheter due to bending of the plugging wire, the length of the straight tubular part of the guide passage is more than or equal to 1/2 of the length of the intravenous catheter.
A further reliable design is that the length of the straight tubular portion of the guide way is greater than or equal to the length of the intravenous catheter.
More reliably, the length of the straight tubular portion of the guide passage is greater than or equal to the distance between the front end opening thereof and the front end opening of the intravenous catheter.
At least one circumferential area between the guide passage and the outer surface of the blocking wire is in fluid-tight contact, so that the liquid medicine is prevented from entering the inner cavity of the isolation part.
In order to contain the gas therein when the insulating member is deformed, particularly for a bellows-like insulating member, the blocking wire insulating member is connected to a fluid circulation member, the inner space of the insulating member being in fluid communication with the inner space of the fluid circulation member.
In order to facilitate driving the blocking wire and the isolation part to move, the tail section of the elongated blocking wire is connected with a control handle, the bottom end of the blocking wire isolation part is in sealing connection with a part of the control handle, a fluid turnover part can be arranged in an inner cavity of the control handle, and the inner cavity of the blocking wire isolation part is in fluid communication with the inner cavity of the fluid turnover part.
In order to reduce the compression of the increased deflection of the venous catheter to the wall of the vein during the plugging, at least the front section of the slender plugging wire is hollow so as to form a lumen of the plugging wire, and the top end is a blind end; the hollow plugging wire at the front section can not significantly improve the deflection of the intravenous catheter.
Because the overall smaller outer diameter of the plugging wire and the travelling distance is larger, at least the bottom section of the slender plugging wire is hollow so as to form a plugging wire inner cavity, and the inner cavity can be embedded with a boosting guide wire which has larger deflection and smaller outer diameter and can be made of materials such as metal, carbon fiber and the like.
The auxiliary guiding wire can enter the inner cavity of the plugging wire to push the plugging wire to advance better, and the auxiliary guiding wire can also assist to retreat after corresponding connection is arranged.
Because the deflection of the boosting guide wire is larger, when the intravenous catheter is in a blocking state, the boosting guide wire does not enter the inner cavity of the intravenous catheter or enters the inner cavity for a length less than 1/2 of the length of the intravenous catheter.
The auxiliary guide wire guides the top end of the plugging wire to move to the front end opening of the intravenous catheter, and then the auxiliary guide wire can be withdrawn to an initial position or the rear end opening of the intravenous catheter, or the auxiliary guide wire can be withdrawn to the initial position together with the plugging wire after the plugging of the plugging wire is finished.
The auxiliary derivation wire can assist the top end of the blocking wire to move to the rear end opening of the venous catheter, at the moment, the auxiliary derivation wire stays at the rear end opening of the venous catheter and does not move forward any more, and then the blocking wire is independently driven to move to the front end opening of the venous catheter, so that the venous catheter is used as a guide for the forward movement of the blocking wire in the process.
The assistance of the auxiliary guide wire to the blocking wire includes pushing and or supporting.
The top end of the hollow blocking wire can also be set to be a non-blind end, the outer surface of the top end part of the blocking wire is used for blocking the front end opening of the venous catheter, and the top end part of the boosting guide wire is used for blocking the top end opening of the hollow blocking wire.
The bottom ends of the plugging wire and the boosting guide wire can be respectively connected with a control handle which is convenient for external force application, and the bottom ends of the plugging wire isolation parts are directly or fixedly connected with the plugging wire in a sealing way through the control handle of the plugging wire.
In order to further ensure that the intravenous catheter device is isolated outwards in the use process, the derivation assisting wire is also arranged in an isolating part, and the derivation assisting wire can be directly and fixedly connected with the bottom end of the isolating part or is in sealing and fixedly connected with the bottom end of the isolating part through a control handle of the derivation assisting wire.
The various control handles such as a rotary handle and the like under the action of external force can be manually driven or driven by a driving device comprising a motor.
The beneficial effects of the invention are as follows:
1. the blocking wire is coaxially guided to smoothly enter the inner cavity of the intravenous catheter.
2. During the indwelling period without liquid medicine infusion, the top opening of the intravenous catheter is completely plugged by the plugging wire, blood cannot enter the inner cavity of the intravenous catheter, and the risk of thrombus formation in the inner cavity of the intravenous catheter is thoroughly eliminated.
3. The conical top end of the blocking wire partially extends out of the top end opening of the venous catheter in a blocking state, so that the dead space of local blood flow is eliminated, and the occurrence of wall built-up thrombus, fibrin sheath and venous thrombosis is reduced to the greatest extent.
Drawings
The drawings that do not limit the invention are as follows:
1A, 1B, 1C, 1D, 1E, 1F, 1G, 1H, 1I, 1J, 1K, 1L, 1M, 1N:
a schematic structural diagram of embodiment 1;
fig. 2A, 2B: a schematic structural diagram of embodiment 2;
Detailed Description
The embodiments of the present invention are not limited as follows:
example 1:
as shown in fig. 1A, 1B, 1C, 1D, 1E, 1F, 1G, 1H, 1I, 1J, 1K, 1L, 1M, 1N, the present invention includes: a rigid needle tube 1 for puncturing the skin and vein wall, a needle tube seat 16, a vein catheter 2, a vein catheter seat 23, a sealing body 25, a sealing wire 3, a sealing wire guide passage 40 and a separation part 5; the interior of the needle tube 1 is hollow, and the front end of the sharp needle tube is exposed from the front end opening 201 of the intravenous catheter during puncture; the bottom of the needle tube is fixed in the needle tube seat 16, and the needle tube seat 16 is connected with a needle tube seat handle 17; the relatively flexible hollow intravenous catheter 2 may be made of PU, FEP, etc., with the intravenous catheter lumen 20 communicating with the intravenous catheter hub lumen 230 through the rear end opening 202; the upper end surface 233, the lower end surface 234, the left side surface 235 and the right side surface 236 are arranged between the front end and the rear end of the venous catheter seat 23, and a sealing body 25 is filled in an opening at the rear end of the venous catheter seat; the left side 235 of the venous catheter seat is provided with a hollow infusion side branch 2351 which is connected with the connecting pipe 24, and the inner cavity 230 of the venous catheter seat is communicated with the inner cavity 240 of the connecting pipe; the front end face 251 of the sealing body 25 is adjacent to the inner cavity 230 of the intravenous catheter seat, the sealing body 25 is formed by connecting a hard part 25a and an elastic part 25b, the hard part 25a can be made of resin PC, AS, ABS and the like, the elastic part 25b can be made of elastic materials such as silicone rubber, polyurethane and the like, and the elastic part 25b can close and seal the passing area of the needle tube 1 after being pulled away; the seal body hard part 25a is internally provided with a seal wire guide passage 40, the guide passage 40 is in a straight pipe shape as a whole, and the guide passage 40 is provided with a front end opening 401 and a rear end opening 402; the elongated blocking wire 3 can enter the guide channel 40 from the guide channel rear end opening 402; the outside of the plugging wire 3 is a deformable saccular thin-wall isolation part 5 which can be made of flexible membrane materials such as silicone rubber, polyurethane, polyethylene, EVA, PET and the like, the front end 51 of the isolation part is provided with an opening 501, the front end 51 of the isolation part is hermetically sleeved on the rear end of the hard part 25a of the sealing body 25 to extend out of an extension section 44, and the isolation part is particularly hermetically connected in a bonding, heat welding, ultrasonic welding and other modes, and the opening 402 at the rear end of the guide passage is positioned on the extension section 44; the portions of the occlusion wire 3 that may be in direct contact with and/or in fluid communication with the intravenous catheter hub lumen 230 are all located within the spacer member lumen 50, with the occlusion wire ends in this embodiment being located entirely within the spacer member lumen 50.
The blocking wire 3 is hollow wire-shaped, and can be formed by resin materials such as PU, PA, PET, PDFE by extrusion or injection molding, or can be made of metal materials such as nickel-titanium alloy.
In the scheme, the central axis L2 of the guide passage 40 is collinear with the central axis L1 of the intravenous catheter by taking L3 as an axis and driving the sealing body 25 to rotate through operating the shell assembly 8, the shell assembly 8 is sleeved outside the plugging wire 3 and the isolation part 5, and the components of the shell assembly 8 can accurately control the movement of the plugging wire 3 and the boosting guide wire 6 therein.
Fig. 1A and 1B show that in the initial state, the central axis L2 of the straight tubular guide passage 40 is not coaxial with but in parallel relation to the central axis L1 of the intravenous catheter, the needle tube seat 16 is located below the isolation member 5, the upper end surface 233 of the intravenous catheter seat 23 is provided with an arched window 2331, a part of the hard sealing body portion 25a is exposed in the arched window 2331, except that the rear end of the hard sealing body portion 25a is provided with an extension portion 259 protruding from the rear end surface 232 of the intravenous catheter seat, and the extension portion 259 is sleeved with a connecting portion 834 of the lower housing member 83 of the housing assembly 8; the shell assembly 8 is disc-shaped and is formed by combining a lower shell member 83, a middle shell member 82, an upper shell member 81 and an assembly disc 84; in the initial state shown in fig. 1A, 1B, the lower housing part 83 is up, the middle housing part 82 is centered, the upper housing part 81 is down, and the mounting plate 84 passes through the lower housing part center void 8300; in order to increase stability, the middle position of the arched window 2331 is provided with a bridge-shaped reinforcing rib 2334 which extends upwards and longitudinally spans forwards and backwards, the hard part 25a of the sealing body is provided with a cylindrical limiting protrusion 2594, the cylindrical limiting protrusion 2594 does not expose the arched window 2331, and the cylindrical limiting protrusion 2594 is propped against the left boundary 2331a of the arched window; when the control housing assembly 8 is rotated to bring the stopper projection 2594 into abutment with the right boundary (not shown) of the arcuate window, the central axis L2 of the guide passage 40 is coaxial with the central axis L1 of the intravenous catheter.
As shown in fig. 1D, the extension portion 259 of the seal body hard portion 25a is provided with a plurality of snap hooks 2593, and the snap hooks 2593 are fitted into rectangular fitting holes 8341 on the lower case member connecting portion 834, thereby connecting the two together; when the needle tube 1 is withdrawn, the finger holds the main body of the lower shell member 83 and/or other parts of the shell assembly 8 connected with the lower shell member 83 to rotate, so that the sealing body 25 can be driven to synchronously rotate for half a circle along the axis L3, the initial state of FIG. 1A is changed into the coaxial state of FIG. 1C, at this time, the lower shell member 83 is positioned below, the upper shell member 81 is positioned above, and three blade-shaped protrusions 811 are arranged on the upper end surface 814 of the upper shell member; fig. 1C also shows a diagonal slot 833 on the left side of the lower housing member 83, with the needle hub 16 being partially positioned within this diagonal slot 833 prior to withdrawal.
FIG. 1D also shows that after the needle tube 1 is withdrawn, the linear region 253 is closed and sealed to the outside, the needle tube seat recess 256 on the sealing body 25 is empty, the hollow plugging wire cavity 30 is provided with the boosting guide wire 6, and the partially enlarged part shows that the boosting guide wire front end 61 has a certain gap with the inner side of the top end 311 of the plugging wire front section, and of course, the boosting guide wire front end can also be completely abutted against; the auxiliary guide wire 6 can be made of metal materials such as titanium alloy and stainless steel or hard resins such as PET and PA, and the arrangement of the auxiliary guide wire 6 increases the strength of the hollow blocking wire 3 and facilitates the forward movement of the hollow blocking wire.
Further, the rear end of the sealing body hard part 25a forming the guide passage 40 protrudes out of an extension section 44, the outer surface of the extension section 44 is in sealing connection with the inner surface of the opening part 51 at the front end of the bellows-shaped isolation part, the tail end of the bellows-shaped isolation part 5 is connected with a columnar control handle 53, the upper end surface of the control handle 53 is provided with an assembly hole 532, and one side of the control handle 53 is connected with a fluid turnover part 54 which is easy to expand and deform; the rear end of the control handle 53 is connected with a proximal end part 71 of a bellows-shaped boosting guide wire isolation part 7, a distal end part 72 of the boosting guide wire isolation part 7 is stopped at a columnar boosting guide wire control handle 73, and an assembly hole 730 is formed in the upper end face of the control handle 73; between the outer ring rib 832 and the inner ring rib 831 of the lower shell 83 is a circular receiving groove 830, and the isolation member 5 and the boosting guide wire isolation member 7 are assembled to the receiving groove 830 and a connecting portion inner cavity 8340 communicated with the same. The design of the plurality of grooves of the inner ring ribs 831 of the lower housing part 83 can reduce the weight of materials and reduce the production cost.
As shown in fig. 1D and 1E, the central void 820 of the middle shell member 82 is nested over the upper shell member inner annular bead 812, with the outer surface of the inner annular bead 812 abutting the middle shell member central void edge 8201, which is in relatively movable contact or proximity; the middle shell part 82 is provided with an arc-shaped window 821, and the control handle 53 is sleeved in the arc-shaped window 821; the lower end surface 813 of the upper shell part 81 is provided with a jogged column 815, and the jogged column 815 is embedded into the assembling hole 532 of the upper end surface of the control handle 53 through the arc window 821 of the middle shell part, so that the upper shell part 81 is connected with the isolation part 5 and the plugging wire 3; the lower end face 823 of the middle case member 82 is provided with an engaging post 826, and the engaging post 826 is fitted into the fitting hole 730 of the upper end face of the control lever 73, so that the middle case member 82 is connected to the boosting guide wire isolation member 7 and the boosting guide wire 6.
Further, the lower middle housing part 823 is adjacent to the upper outer ring bead surface 8321 of the lower housing part, while the lower upper housing part 813 is adjacent to the upper middle housing part 824; the upper end surface 843 of the mounting plate 84 is adjacent to the annular boss lower end surface 8302 (see fig. 1G) of the lower shell member central cavity 8300, the mounting plate 84 is provided with a plurality of vertical upward buckles 841, the mounting plate buckles 841 penetrate through the lower shell member central cavity 8300 and the middle shell member central cavity 820, and finally outward protruding parts 8411 of the mounting plate buckles are respectively embedded into corresponding lateral mounting holes 8120 on the annular ribs 812 of the upper shell member lower end surface 813, so that the shell assembly 8 is assembled into a whole; the middle shell member 82 and the upper shell member 81 are rotatable relative to the lower shell member 83, and the middle shell member 82 and the upper shell member 81 are rotatable relative to each other; obviously, the upper housing part 81 is rotated synchronously in unison with the mounting plate 84; when the rotating upper case member 81 drives the manipulation handle 53 located in the arc-shaped window 821 to rotate, the rotation range of the manipulation handle 53 is stopped between the proximal end boundary 8212 and the distal end boundary 8211 of the arc-shaped window 821; for finger manipulation, the outer edge of the middle housing part 82 is provided with a plurality of teeth 825, and the rotation stops when the middle housing part 82 rotates until the front end 8251 of the proximal teeth 825 abuts against the diagonal slot boss 8331 of the lower housing part 83.
As shown in the partial sectional view of fig. 1F, when the needle cannula 1 is withdrawn, the central axis L2 of the guide passage 40 and the central axis L1 of the intravenous catheter are rotated to a coaxial state, and the fitting post 815 of the upper housing member 81 is fitted into the upper end surface fitting hole 532 of the manipulation handle 53 through the middle housing member arc-shaped window 821 (see 1G); the embedded column 826 of the middle shell part 82 is embedded into the assembling hole 730 of the upper end face of the auxiliary guiding wire control handle 73; the front end 8251 of the proximal tooth 825 of the middle housing member 82 is distal from the diagonal slot boss 8331 of the lower housing member 83; the front end 8252 of the distal end tooth of the middle housing member 82 abuts or is immediately adjacent to the right boss 8342 of the lower housing member attachment 834; at this time, the finger acts on the middle case member tooth 825 to rotate clockwise as indicated by the arrow, and the auxiliary guide wire 6 and the blocking wire 3 are driven to move forward in a circular arc track.
Another angular cross-sectional view is shown in fig. 1G where the occlusion wire handle lumen 530 is in communication with the fluid transfer member lumen 540 in a coaxial state.
As shown in the horizontal cross-sectional view of fig. 1H, in the coaxial state, the control handle 73 is located at the point a, the boost guidewire end 62 is fixed therein, and the control handle 53 is located at the point c.
As shown in fig. 1I, rotating the middle housing part 82 clockwise as indicated by the arrow, the front end 8251 of the middle housing part 82 proximal tooth 825 abuts the diagonal slot boss 8331 of the lower housing part 83, rotating into place; at this point, as shown in the partial cross-sectional view of fig. 1J, the tip 311 of the front section of the occlusion wire 3 is advanced to the rear end opening 202 of the intravenous catheter, and the front end 61 of the boosting guide wire is positioned in the tip 311; at this time, the lever 73 is advanced to the b-point position, and the lever 53 is advanced to the d-point position, as shown in the horizontal sectional view of fig. 1K.
Rotating the upper housing part 81 clockwise as indicated by the arrow in fig. 1L, and driving the stopper wire 3 to continue to advance, as shown in the partial sectional view in fig. 1M, the stopper wire tip 311 protrudes from the intravenous catheter front end opening 201 to reach a blocked state, the corrugated spacer member 5 located in the accommodating groove 830 is significantly compressed, at this time, the spacer member 5 is mostly located in the connecting portion lumen 8340 in the drawing, and the auxiliary wire spacer member 7 is maximally stretched; the horizontal cross-sectional view 1N shows that the handle 53 is now advanced to the e-point position while the handle 73 is still at the b-point position, which allows the boost guidewire 6 to not enter the lumen 20 of the intravenous catheter or to enter a very small length, so as to ensure that the hollow anterior segment 31 of the occlusion wire does not significantly increase the deflection of the intravenous catheter 2 in the occluded state, eliminating the potential for additional damage to the wall of the vein; in the blocking state, the top end 311 of the blocking wire is conically tapered and protrudes from the front end opening 201 of the intravenous catheter, so that blood vortex at the position during blocking is eliminated to the greatest extent, the top end 311 of the blocking wire and the front end opening 201 of the intravenous catheter are in blood blocking contact, namely, blood cannot pass through a gap between the top end 311 of the blocking wire and the front end opening 201 of the intravenous catheter, and the blocking wire can be in interference fit or conformal fit; the accommodating groove 830 plays a role in guiding and limiting the isolation part 5, the blocking wire 3, the boosting guide wire isolation part 7 and the boosting guide wire 6 in the whole course; the blocking removal is performed in a reverse direction.
The whole plugging and plugging releasing operation is carried out on the premise of isolating the external environment, and no risk that microorganisms or foreign matters enter the inner cavity 230 of the intravenous catheter seat exists.
Example 2:
for clarity, the length L8 of the straight tubular guide path 40 is greater than or equal to the distance L5 from the front end opening 401 to the rear end opening 202 of the intravenous catheter, as shown in fig. 2A, so that the occlusion wire 3 can be ensured to coaxially advance smoothly into the intravenous catheter lumen 20 under the constraint of the straight tubular guide path 40, and the intravenous catheter lumen 20 can continuously guide the occlusion wire 3.
A experimentally proven solution is that the length L8 of the straight tubular guide path 40 is greater than or equal to 1/2 of the length L6 of the intravenous catheter 2, which to some extent avoids the use of a curved guide path 40, the curved portion shaping the occlusion wire 3 to create resistance to its entry into the intravenous catheter lumen 20.
A more reliable size option is that the length L8 of the straight tubular guide channel 40 is greater than or equal to the length L6 of the intravenous catheter 2 to ensure that the occlusion wire 3 is not affected by the possible bends of the guide channel 40 during advancement.
More reliably, the length L8 of the straight tubular guide passage 40 is greater than or equal to the distance L7 from the front end opening 401 to the front end opening 201 of the intravenous catheter, so that even the elongated blocking wire 3 which is easy to bend can be smoothly introduced into the intravenous catheter 20 after being shaped in the straight tubular guide passage 40.
Fig. 2B shows, partially enlarged, that two circumferential projections 404 are provided in the opening 401 at the front end of the guide passage, the circumferential projections 404 being in interference contact with the outer surface of the occlusion wire 3, preventing the liquid medicine or blood in the lumen 230 of the iv catheter holder from entering the lumen 50 of the isolation member from the gap between them.
Claims (8)
1. A closable intravenous catheter device comprising: a needle tube (1) for puncturing the skin and vein wall, a needle tube seat (16) for fixing the bottom of the needle tube therein; a venous catheter (2), a venous catheter seat (23) which is connected with the rear end opening (202) of the venous catheter in a sealing way; the needle tube (1) passes through a sealing body (25) on the intravenous catheter seat (23), the front part of the needle tube is positioned at the inner cavity (20) of the intravenous catheter, and the front end of the needle tube is exposed from an opening (201) at the front end of the intravenous catheter; and an elongated movable blocking wire (3); an isolation member (5) that isolates a part or all of the plug wire (3) from the outside; the method is characterized in that: the device also comprises a guide passage (40) and a shell assembly (8), wherein at least the front end of the guide passage (40) is in a straight tube shape; the front end opening (401) of the guide passage is communicated with the inner cavity (20) of the intravenous catheter directly or through the inner cavity (230) of the intravenous catheter seat, and the plugging wire (3) can penetrate through the guide passage (40) and enter the inner cavity (20) of the intravenous catheter; the guide passage (40) is capable of rotating and moving at least the straight tubular portion and the intravenous catheter (2) in an outward-isolated manner to a position where the central axis (L2) thereof coincides with the central axis (L1) of the intravenous catheter; the blocking wire (3) and the guide passage (40) which are in direct contact and/or fluid communication with the inner cavity (230) of the intravenous catheter seat are isolated from the outside; the shell component (8) is connected with the guide passage (40), and the blocking wire (3) and the isolation part (5) are at least partially and conformally positioned in the shell component (8); the sealing body (25) or the part connected with the guide passage (40) is connected with the intravenous catheter seat (23) in a relatively rotatable way, and the rotation axis (L3) of the sealing body is parallel to the central axis (L1) of the intravenous catheter; the perpendicular distance between the central axis (L2) of the guide passage and the rotation axis (L3) is equal to the perpendicular distance between the central axis (L1) of the intravenous catheter and the rotation axis (L3); at least one circumferential region (404) between the guide channel (40) and the outer surface of the occlusion wire is in fluid tight contact.
2. A closable intravenous catheter device according to claim 1, wherein: the length (L8) of the straight tubular portion of the guide passage is greater than or equal to the distance (L5) between the front end opening (401) of the guide passage and the rear end opening (202) of the intravenous catheter.
3. A closable intravenous catheter device according to claim 1, wherein: the length (L8) of the straight tubular portion of the guide passage is greater than or equal to 1/2 of the length (L6) of the intravenous catheter.
4. A closable intravenous catheter device according to claim 1, wherein: the length (L8) of the straight tubular portion of the guide passage is greater than or equal to the distance (L7) between the front end opening (401) of the guide passage and the front end opening (201) of the intravenous catheter.
5. A closable intravenous catheter device according to claim 1, wherein: the device also comprises a fluid turnover part (54) connected with the isolation part (5) of the plugging wire (3), and the inner cavity (50) of the isolation part is in fluid communication with the inner cavity (540) of the fluid turnover part; a fluid transfer member (54) is located within the housing assembly (8).
6. A closable intravenous catheter device according to claim 1, wherein: the slender plugging wire (3) is hollow at least at the tail section so as to form a plugging wire inner cavity (30), and the plugging wire also comprises a boosting guide wire (6) which can enter the plugging wire inner cavity (30) to push the plugging wire (3) to advance.
7. A closable intravenous catheter device according to claim 6, wherein: the device also comprises a boosting guide wire isolation part (7) for isolating part or all of the boosting guide wire (6) from the outside, and the boosting guide wire isolation part (7) is positioned in the shell assembly (8).
8. A closable intravenous catheter device according to claim 6, wherein: when the intravenous catheter (2) is in the blocking state, the derivation-assisting wire (6) does not enter the intravenous catheter inner cavity (20) or enters the inner cavity with the length less than 1/2 of the intravenous catheter length (L6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910076863.XA CN109550104B (en) | 2019-01-27 | 2019-01-27 | Vein catheter device capable of plugging |
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| CN201910076863.XA CN109550104B (en) | 2019-01-27 | 2019-01-27 | Vein catheter device capable of plugging |
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| CN109550104A CN109550104A (en) | 2019-04-02 |
| CN109550104B true CN109550104B (en) | 2024-01-26 |
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| CN109550105B (en) * | 2019-01-27 | 2024-01-26 | 浙江百获健康科技有限公司 | Vein catheter device capable of plugging |
| CN112043904A (en) * | 2019-06-06 | 2020-12-08 | 曾凡洪 | Venous catheter plugging device |
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| CN209933656U (en) * | 2019-01-27 | 2020-01-14 | 北京仰生恒泰科技有限责任公司 | Venous catheter device capable of being plugged |
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| WO2005046736A2 (en) * | 2003-11-06 | 2005-05-26 | Possis Medical, Inc. | Thrombectomy catheter system with occluder and method of using same |
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