Intelligent anti-exosmosis device for drug delivery connector

Abstract

The invention discloses an intelligent exosmosis prevention device for a drug delivery connector. According to the device, connector exosmosis is blocked through a leakage capturing cavity and an elastic ring, liquid is directed to a humidity-sensitive expansion core through a capillary drainage strip so as to drive a pressing block to press and close a flexible clamping and closing section, and visual prompt is achieved through cooperation of an outer ring developing layer of the expansion core and a transparent control part. Therefore, early-stage blocking, automatic cutoff and high visual alarm are achieved, and the safety of chemotherapy infusion is improved. The infusion device is characterized by comprising an infusion assembly, a connecting assembly and an anti-seepage assembly, the infusion assembly comprises an infusion tube, a conveying tube and an indwelling needle connector, the infusion tube is clamped at the open end of the conveying tube, the infusion tube is communicated with the conveying tube, the other end of the conveying tube is of a conical structure and connected with one end of the indwelling needle connector, and the other end of the indwelling needle connector is connected with the connecting assembly. The conveying pipe is communicated with the remaining needle connector, and the connecting assembly comprises a limiting groove, a connecting piece, a limiting ring, a leakage catching cavity and an elastic ring.

Description

TECHNICAL FIELD

[0001] The application relates to an intelligent drug delivery connector anti-extravasation device capable of quickly reacting to stop infusion, and belongs to the technical field of infusion connectors. BACKGROUND

[0002] Most of the chemotherapy drugs have strong irritation, and some can also cause tissue necrosis. During the infusion process, once drug liquid extravasation or connector leakage occurs, even if it is only a small amount, it will cause local tissue damage and may also cause contamination. Therefore, the core requirement of clinical management is clear: stop the drug liquid from contacting the skin as soon as possible, and interrupt the infusion at the first time. However, the current method mainly relies on nursing staff to regularly patrol and cooperate with transparent dressings to observe the situation. This method has obvious limitations: on the one hand, nursing staff have heavy daily workloads, and the dressings may block the line of sight, and the patient's turning over and changing of body position will also affect observation, so that early micro-leakage is often difficult to discover in time; on the other hand, even if the abnormality is found, manual operation is needed to stop the infusion, and the disposal process will inevitably be delayed. In order to shorten the reaction time, some medical institutions try to introduce an external leakage monitoring patch or use an electronic sensing device. However, these schemes also have many problems: not only do they depend on power supply and communication equipment, but also have high costs and maintenance pressure after long-term use; and they are easily disturbed by patient sweat, cleaning liquid and daily nursing operations, and often have false positives or false negatives. More importantly, these devices and infusion pipelines are separate, and usually can only issue an alarm, and cannot directly cut off the infusion path, and still need manual follow-up processing. The disclosure No. CN209301866U discloses a chemotherapy drug anti-permeation infusion device, which comprises an infusion device and a fixing sleeve. The infusion device comprises a puncture needle, a needle fixing tube, an infusion rubber tube and an infusion bottle connector. The puncture needle, the needle fixing tube, the infusion rubber tube and the infusion bottle connector are fixed in sequence. The fixing sleeve comprises a glove body and a fixing unit. The glove body is adapted to the shape of the patient's hand, and the structure design is reasonable. During the infusion of the chemotherapy drug, the puncture needle can be kept in good fixation under the fixed cover, and the hand can still grasp objects without affecting the infusion. The skin state around the puncture can be observed through the visual window during the infusion. When the exosmosis state occurs, the exosmosis drug can be injected through the branch pipe injection port to avoid aggravating the exosmosis effect. However, the above-mentioned infusion device has weak recognition and treatment ability for early, trace and transparent liquid, and cannot automatically limit the flow / flow after leakage occurs, still relying on manual discovery and manual processing, and the treatment has a lag. SUMMARY

[0003] In order to improve the above situation, the present application provides an intelligent drug delivery connector anti-exosmosis device which can block the interface exosmosis through the leakage capturing cavity and the elastic ring, direct the liquid to the moisture-sensitive expansion core through the capillary drainage strip, drive the pressure block to close the flexible clamping section, realize intuitive prompt through the expansion core outer ring color developing layer and transparent control, so as to realize early blocking, automatic flow interruption and visual warning, and improve the safety of chemotherapy infusion.

[0004] The intelligent drug delivery connector anti-exosmosis device of the present application is realized as follows: the intelligent drug delivery connector anti-exosmosis device of the present application comprises an infusion assembly, a connecting assembly and an anti-permeation assembly, The infusion assembly comprises an infusion tube, a delivery tube and a retention needle connector, The infusion tube is clamped at the open end of the delivery tube, and the infusion tube is communicated with the delivery tube, The other end of the delivery tube is in a tapered structure and is connected with one end of the retention needle connector, and the delivery tube is communicated with the retention needle connector, The connecting assembly comprises a limiting groove, a connecting piece, a limiting ring, a leakage capturing cavity and an elastic ring, The outer side of the delivery tube near the other end is provided with a limiting groove, The connecting piece is threadedly connected with the retention needle connector near one end, The inner side of the other end of the connecting piece is fixedly provided with a limiting ring, the limiting ring is clamped in the limiting groove, and the connecting piece is rotationally connected with the delivery tube through the limiting ring and the limiting groove, The inner side of the connecting piece is provided with a leakage capturing cavity, and the leakage capturing cavity corresponds to the joint between the retention needle connector and the outer side of the delivery tube when the connecting piece and the retention needle connector are completely threadedly connected, The elastic ring is fixedly connected with the side surface of the leakage capturing cavity through the outer surface, Preferably, the diameter of the elastic ring gradually increases from the end close to the thread of the connecting piece to the middle of the inner surface, The anti-seepage assembly comprises a flexible clamping section, a transmission groove, a control element, a pressing block, a moisture-sensitive expansion core, a transmission hole, a capillary drainage strip, and a locking ring, The two ends of the flexible clamping section are fixedly connected with the inner surface of the delivery tube, and the diameter of the flexible clamping section presents an arc shape that first decreases and then increases from one end to the other end, The transmission groove is formed in the delivery tube, The control element has a circular ring structure, the inner surface of the control element is fixedly connected with the side surface of the delivery tube, and the control element and the delivery tube have a hollow structure, The control element is in communication with the inside of the delivery tube through the transmission groove, Preferably, the control element is made of transparent material, One end of the pressing block is arranged in the control element, and the other end of the pressing block passes through the transmission groove and is arranged in the delivery tube, Preferably, the end of the transmission groove arranged in the delivery tube has an arc structure, The moisture-sensitive expansion core is arranged in the control element, and the outer surface of the moisture-sensitive expansion core is in close contact with the side surface of the hollow part of the control element, Preferably, the inside of the moisture-sensitive expansion core is filled with acrylic salt SAP particles, and the outside of the moisture-sensitive expansion core is wrapped with fiber felt, Preferably, the outer surface of the moisture-sensitive expansion core is coated with water-induced color change microcapsules, The delivery tube and the control element are provided with transmission holes, and the transmission holes extend from one end surface of the delivery tube to the control element close to the moisture-sensitive expansion core, The capillary drainage strip is arranged in the transmission hole, one end of the capillary drainage strip is arranged at the joint between the indwelling needle connector and the delivery tube, and the other end of the capillary drainage strip is connected with the moisture-sensitive expansion core, Each transmission hole corresponds to one capillary drainage strip, Preferably, the capillary drainage strip is made of hydrophilic non-woven fabric or sintered PE strip material, Preferably, the delivery tube is provided with a plurality of transmission holes, and the plurality of transmission holes are arranged equidistantly along the circumference of the delivery tube, The locking ring is fixedly connected with the inner surface of the delivery tube, the locking ring has an arc structure, and the opening end of the locking ring faces the transmission groove, The transmission groove, the control element, and the locking ring are all arranged at the middle position in the axial direction of the flexible clamping section, Further, the moisture-sensitive expansion core is replaced by a special-shaped moisture-sensitive expansion core, the special-shaped moisture-sensitive expansion core has a circular arc structure, and the special-shaped moisture-sensitive expansion core is opposite to the opening of the locking ring. Advantages

[0005] I. Achieve early containment and immediate stop, reduce skin contact and extravasation risk.

[0006] II. Visual color prompt is clear and intuitive, which is convenient for nursing rapid judgment and disposal process.

[0007] III. The design without mechanical elements significantly reduces failure points and assembly errors.

[0008] IV. Simple structure, easy-to-get materials and low cost are suitable for large-scale production. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 It is a stereoscopic structure diagram of the intelligent drug delivery connector anti-extravasation device; Figure 2 It is a structural schematic diagram of the intelligent drug delivery connector anti-extravasation device; Figure 3 It is a structural schematic diagram of the intelligent drug delivery connector anti-extravasation device; Figure 4 It is a structural schematic diagram of embodiment 2 of the intelligent drug delivery connector anti-extravasation device; DRAWINGS

[0010] Among them are: indwelling needle connector (1), connecting piece (2), delivery pipe (3), control element (4), infusion tube (5), leakage capturing cavity (6), elastic ring (7), limiting ring (8), limiting groove (9), transmission hole (10), capillary drainage strip (11), humidity-sensitive expansion core (12), pressing block (13), flexible clamping section (14), clamping ring (15), transmission groove (16), special-shaped humidity-sensitive expansion core (17). DETAILED DESCRIPTION Embodiment 1

[0011] The intelligent drug delivery connector anti-extravasation device is realized as follows: the intelligent drug delivery connector anti-extravasation device includes an infusion assembly, a connecting assembly and an anti-extravasation assembly, The infusion assembly includes an infusion tube (5), a delivery pipe (3) and an indwelling needle connector (1), The infusion tube (5) is clamped at the open end of the delivery pipe (3), and the infusion tube (5) is communicated with the delivery pipe (3), The other end of the delivery pipe (3) is in a tapered structure, and is connected with one end of the indwelling needle connector (1), and the delivery pipe (3) is communicated with the indwelling needle connector (1), The connecting assembly includes a limiting groove (9), a connecting piece (2), a limiting ring (8), a leakage capturing cavity (6) and an elastic ring (7), The outer side surface of the delivery pipe (3) is provided with a limiting groove (9) close to the other end, The connecting piece (2) is threadedly connected with the indwelling needle connector (1) near one end, The inner side of the other end of the connecting piece (2) is fixedly provided with a limiting ring (8), the limiting ring (8) is clamped in a limiting groove (9), and the connecting piece (2) is rotationally connected with the delivery pipe (3) through the limiting ring (8) cooperating with the limiting groove (9), The inner side of the connecting piece (2) is provided with a leakage capturing cavity (6), the leakage capturing cavity (6) corresponds to the joint between the indwelling needle connector (1) and the outer side of the delivery pipe (3) when the connecting piece (2) is completely threadedly connected with the indwelling needle connector (1), The outer ring surface of the elastic ring (7) is fixedly connected with the side surface of the leakage capturing cavity (6), Preferably, the diameter of the elastic ring (7) gradually increases from the threadedly connected end of the connecting piece (2) to the inner side of one-half of the connecting piece (2), The anti-seepage assembly comprises a flexible clamping section (14), a transmission groove (16), a control element (4), a pressing block (13), a moisture-sensitive expansion core (12), a transmission hole (10), a capillary drainage strip (11) and a clamping ring (15), The flexible clamping section (14) is fixedly connected with the inner side of the delivery pipe (3) at both ends, and the diameter of the flexible clamping section (14) decreases first and then increases in an arc shape from one end to the other end, The delivery pipe (3) is provided with a transmission groove (16), The control element (4) has a circular ring structure, the inner side of the control element (4) is fixedly connected with the side surface of the delivery pipe (3), and the control element (4) and the delivery pipe (3) have a hollow structure, The control element (4) is in communication with the inside of the delivery pipe (3) through the transmission groove (16), Preferably, the control element (4) is made of transparent material, One end of the pressing block (13) is arranged in the control element (4), and the other end of the pressing block (13) is arranged in the delivery pipe (3) through the transmission groove (16), Preferably, one end of the transmission groove (16) arranged in the delivery pipe (3) has an arc structure, The moisture-sensitive expansion core (12) is arranged in the control element (4), and the outer ring surface of the moisture-sensitive expansion core (12) is attached to the side surface of the hollow part of the control element (4), Preferably, the inside of the moisture-sensitive expansion core (12) is filled with acrylic salt SAP particles, and the outside is wrapped with fiber felt, Preferably, the outer ring surface of the moisture-sensitive expansion core (12) is coated with water-induced color change microcapsules, The delivery pipe (3) and the control element (4) are provided with a transmission hole (10), the transmission hole (10) extends from one end surface of the delivery pipe (3) to the control element (4) close to the moisture-sensitive expansion core (12), The delivery hole (10) is internally provided with a capillary drainage strip (11), one end of the capillary drainage strip (11) is arranged at the joint between the indwelling needle connector (1) and the delivery tube (3), and the other end of the capillary drainage strip (11) is connected with a moisture-sensitive expansion core (12), Each of the delivery holes (10) corresponds to a capillary drainage strip (11), Preferably, the capillary drainage strip (11) is made of hydrophilic non-woven fabric or sintered PE strip material, Preferably, a plurality of delivery holes (10) are formed on the delivery tube (3), and the plurality of delivery holes (10) are arranged at equal intervals along the circumference of the delivery tube (3), The clamping ring (15) is fixedly connected with the inner ring surface of the delivery tube (3), the clamping ring (15) is in an arc structure, and the opening end thereof faces the transmission groove (16), The transmission groove (16), the control element (4), and the clamping ring (15) are all arranged at the middle position in the axial direction of the flexible clamping section (14), In use, first, the connector (2) is screwed to the indwelling needle connector (1) according to the Luer thread until it is in place, the connector (2) is rotatably captured by the limiting ring (8) and the limiting groove (9) of the delivery tube (3), and axial separation does not occur during the screwing process. The liquid medicine enters the delivery tube (3) from the medicine bottle in sequence through the infusion tube (5), passes through the flexible clamping section (14) along the main flow channel, and then enters the indwelling needle connector (1) and is delivered into the patient's body. If a small amount of leakage occurs at the joint, the leakage capturing cavity (6) on the inner side of the connector (2) forms a containment space for the joint between the indwelling needle connector (1) and the delivery tube (3) under the adhesion of the elastic ring (7), so that the leaked liquid is preferentially retained in the annular cavity and does not overflow to the skin surface. The retained liquid is rapidly absorbed by the capillary drainage strip (11) and is directed into the moisture-sensitive expansion core (12) in the control element (4) through the delivery hole (10) arranged on the delivery tube (3) and the control element (4). The moisture-sensitive expansion core (12) is limited to expand when it encounters liquid, and the generated thrust is transmitted to the flexible clamping section (14) through the pressure block (13) and the transmission groove (16) and is pressed towards the center axis of the main flow channel. Under the support and self-locking cooperation of the clamping ring (15), the flexible clamping section (14) is further closed from the flow limiting state to the basic closed state, thereby blocking the continuous infusion and preventing further liquid leakage. At the same time, the water-induced color change microcapsule layer on the outer ring surface of the moisture-sensitive expansion core (12) develops color when it encounters liquid, and the trigger state can be directly observed through the transparent control element (4), which is convenient for medical staff to handle in a timely manner; Example 2

[0012] The difference between the embodiment and embodiment 1 is that the wet-sensitive expansion core (12) is replaced by a special-shaped wet-sensitive expansion core (17), the special-shaped wet-sensitive expansion core (17) is in a circular arc structure, and is opposite to the opening of the locking ring (15); in use, the special-shaped wet-sensitive expansion core (17) has a reduced volume and needs to absorb a lower initial liquid amount, and early trace exudate delivered by the capillary drainage strip (11) can trigger expansion, thereby shortening the reaction time; A leakage capturing cavity (6) is formed on the inner side of the connecting piece (2), and the outer ring surface of the elastic ring (7) is fixedly connected with the side surface of the leakage capturing cavity (6); when the connecting piece (2) is completely screwed with the indwelling needle connector (1), the design can form a blocking space for the joint seam, preferentially accommodate the leaked liquid, avoid the contact of the leaked liquid with the skin, and provide a liquid source for subsequent drainage and triggering; The inner side diameter of the elastic ring (7) gradually increases from the end close to the thread of the connecting piece (2) to the middle; in the locking process, the design can form a gradual fitting and flow guiding effect, so that the exudate is stably pressure-controlled and directionally flows into the leakage capturing cavity (6), and the early blocking effect is improved; The delivery tube (3) and the control member (4) are provided with a transmission hole (10), and the transmission hole (10) is internally provided with the capillary drainage strip (11); the design can quickly and directionally guide the exudate at the joint between the indwelling needle connector (1) and the delivery tube (3) to the wet-sensitive expansion core (12), thereby shortening the time from leakage to triggering; The wet-sensitive expansion core (12) is arranged in the control member (4), and the outer ring surface of the wet-sensitive expansion core (12) is fitted with the side surface of the hollow part of the control member (4); when meeting the liquid, the design can be limited to expand and efficiently output an axial thrust, so as to reliably drive the pressing block (13) to enter the transmission groove (16) and accelerate the flow limiting / discontinuing response; The flexible clamping section (14) is designed to have an arc-shaped diameter that first decreases and then increases from one end to the other end; under the action of the pressing block (13), the flexible clamping section (14) can realize the transition from flow limiting to complete flattening with a small displacement, thereby reducing the required stroke for triggering and improving the flow discontinuing reliability; The locking ring (15) is in an arc structure, and the opening end thereof faces the transmission groove (16); the design can provide a bearing surface when the pressing block (13) is pressed in and form a self-locking retention, so that the flexible clamping section (14) maintains a closed state after triggering and prevents rebounding and reopening; The leakage at the interface between the leakage capturing cavity (6) and the elastic ring (7) is blocked, the liquid is directionally guided to the wet-sensitive expansion core (12) by the capillary drainage strip (11), the pressing block (13) is driven to press and close the flexible clamping section (14), the color layer outside the expansion core (12) cooperates with the transparent control member (4) to realize intuitive prompting, thereby realizing early blocking, automatic flow discontinuing, and visible alarm, and improving the safety of chemotherapy infusion.

[0013] It should be noted that unless otherwise explicitly specified and limited, the terms "placed", "connected", and "linked" should be interpreted broadly, for example, can be fixed connection modes such as folding connection, rivet connection, pin connection, bonding connection, and welding connection, or can be detachable connection modes such as threaded connection, buckle connection, and hinge connection, or integral connection, or electrical connection, or direct connection, or indirect connection through an intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0014] It should be further pointed out that in the description of the above specific embodiments, only the differences with other embodiments are described for simplicity and clarity, but those skilled in the art should know that the above specific embodiments themselves are also independent technical solutions.

Claims

1. An intelligent drug delivery connector anti-leakage device, comprising an infusion assembly, a connecting assembly, and an anti-leakage assembly, characterized in that: The infusion assembly includes an infusion tube, a delivery tube, and an indwelling needle connector. The infusion tube is clamped at the open end of the delivery tube, and the infusion tube communicates with the delivery tube. The delivery tube communicates with the indwelling needle connector. The connection assembly includes a limiting groove, a connector, a limiting ring, a leak-catching chamber, and an elastic ring. A limiting groove is formed on the outer side of the delivery tube near one end. The connector is threaded to the indwelling needle connector near one end. A limiting ring is fixedly placed on the inner side of the other end of the connector. The limiting ring is clamped in the limiting groove, and the connector is rotatably connected to the delivery tube through the limiting ring and the limiting groove. A leak-catching chamber is formed on the inner side of the connector, and the outer ring surface of the elastic ring is fixedly connected to the side of the leak-catching chamber. The leak-proof assembly includes a flexible clamp. The system comprises a closed section, a transmission groove, an adjustment control, a pressure block, a humidity-sensitive expansion core, a transmission hole, a capillary drain strip, and a locking ring. Both ends of the flexible clamping section are fixedly connected to the inner side of the delivery pipe. The delivery pipe has a transmission groove. The inner side of the adjustment control is fixedly connected to the side of the delivery pipe. The adjustment control communicates with the inside of the delivery pipe through the transmission groove. One end of the pressure block is placed inside the adjustment control, and the other end of the pressure block passes through the transmission groove and is placed inside the delivery pipe. The humidity-sensitive expansion core is placed inside the adjustment control. The delivery pipe and the adjustment control have transmission holes. A capillary drain strip is placed inside the transmission hole. One end of the capillary drain strip is placed at the joint between the indwelling needle connector and the delivery pipe, and the other end of the capillary drain strip is connected to the humidity-sensitive expansion core. The locking ring is fixedly connected to the inner annular surface of the delivery pipe.

2. The intelligent drug delivery connector anti-leakage device according to claim 1, characterized in that... The humidity-sensitive expansion core is replaced with an irregularly shaped humidity-sensitive expansion core, which has an arc-shaped structure and is opposite to the opening of the locking ring.

3. The intelligent drug delivery connector anti-leakage device according to claim 1, characterized in that... The other end of the delivery tube has a tapered structure and is connected to one end of the indwelling needle connector. The inner diameter of the elastic ring gradually increases from the end near the thread of the connector to the halfway point.

4. The intelligent drug delivery connector anti-leakage device according to claim 1, characterized in that... The control device has a circular ring structure, and the transmission groove is placed inside the conveying pipe with one end having an arc shape.

5. The intelligent drug delivery connector anti-leakage device according to claim 1, characterized in that... The outer ring of the moisture-sensitive expansion core is in contact with the side of the hollow part of the control panel. The interior of the moisture-sensitive expansion core is composed of acrylate SAP particles, and the exterior is covered with fiber felt.

6. The intelligent drug delivery connector anti-leakage device according to claim 5, characterized in that... The outer ring of the humidity-sensitive expansion core is coated with water-induced color-changing microcapsules, and the delivery hole extends from one end of the delivery tube to the adjustment control and near the humidity-sensitive expansion core.

7. The intelligent drug delivery connector anti-leakage device according to claim 1, characterized in that... The transmission groove, adjustment control, and locking ring are all located in the middle of the axial direction of the flexible clamping section, and each of the transmission holes corresponds to a capillary guide strip.

8. The intelligent drug delivery connector anti-leakage device according to claim 1, characterized in that... The leakage trap is located at the seam between the indwelling needle connector and the outer side of the delivery tube when the connector and the indwelling needle connector are fully threaded together. The capillary drainage strip is made of hydrophilic non-woven fiber or sintered PE strip material.

9. The intelligent drug delivery connector anti-leakage device according to claim 1, characterized in that... The diameter of the flexible clamping section decreases and then increases in an arc shape from one end to the other. The conveying pipe has multiple conveying holes, which are arranged at equal intervals along the circumference of the conveying pipe.

10. The intelligent drug delivery connector anti-leakage device according to claim 1, characterized in that... The adjustment control and the conveying pipe have a hollow structure. The adjustment control is made of transparent material. The locking ring has an arc-shaped structure, and its open end faces the transmission groove.

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