Improved venous transfusion port

Abstract

The utility model discloses an improved intravenous infusion port which comprises a catheter and a liquid storage cavity with the side wall being of an arc structure, and the side wall is pressed to be bent downwards so that the liquid storage cavity can be bulged in the axial diameter direction. The upper valve covers are arranged on the liquid storage cavity in a circumferential array mode and swing to be in a horizontal state along with expansion of the liquid storage cavity, and a needle inserting channel extending to the center of the liquid storage cavity is defined by the inner walls of the tips of the upper valve covers; and the puncture septum is arranged in the gap of the upper valve cover. According to the improved intravenous infusion port, through the structural design of the upper valve covers, when a medical worker presses the liquid storage cavity, a needle is inserted into the puncture partition along the puncture point, and the inner walls of the tips of the upper valve covers define a needle insertion channel, so that the needle head is guided by the needle insertion channel to be perpendicular to the center of the liquid storage cavity, and the tips of the upper valve covers abut against the needle head; the auxiliary needle head is in a vertical state, so that the problem of deflection is avoided, and subsequent liquid feeding is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and particularly relates to an improved venous infusion port. Background Art

[0002] An infusion port is a completely implanted subcutaneous and long-term in-vivo closed venous infusion system, which will not be exposed outside the patient like a deep vein puncture catheter or a PICC catheter. Generally, the infusion port is implanted in the anterior chest wall, and there is no exposed part after the wound heals, protecting personal privacy. When infusing, only a special non-invasive needle needs to be vertically punctured into the port body of the infusion port, reducing the damage to blood vessels caused by repeated punctures.

[0003] Combined with the publication number CN218793363U, the publication date is April 7, 2023, which discloses a venous infusion port.

[0004] In the prior art including the above patent, it includes a puncture seat, a catheter is arranged on one side of the puncture seat, and an anti-blocking structure is arranged at the end of the catheter away from the puncture seat. The anti-blocking structure includes a flushing part and an anti-aggregation part arranged at the end of the catheter away from the puncture seat. Through the anti-blocking structure arranged at the head section of the catheter and the flushing part in the anti-blocking structure, the catheter is not only a single-hole shape at the head end. With the existence of the flushing part, every time a drug is injected, the drug can flow out evenly from the end of the catheter and the flushing part, effectively flushing the catheter, reducing the formation and wrapping of the protein sheath. The patency of the flushing part also reduces the complete blockage of the catheter end caused by the formation of the fiber sheath. However, since the puncture septum is made of silica gel and is relatively soft, during the insertion of the non-invasive needle, if the medical staff's technique is improper or the patient's posture is improper, the non-invasive needle will be inserted obliquely, causing cutting of the puncture septum, and the cut part will enter the patient's body and induce thrombosis. Content of the Utility Model

[0005] The purpose of the utility model is to provide an improved venous infusion port to solve the above problems.

[0006] To achieve the above purpose, the utility model provides the following technical solution: an improved venous infusion port, including a catheter, including a liquid storage cavity with an arc-shaped side wall, and the side wall bends downward under pressure so that the liquid storage cavity bulges along its axial diameter direction;

[0007] Upper valve covers arranged in a circumferential array on the liquid storage cavity, which swing to a horizontal state as the liquid storage cavity bulges, and the inner walls of the tips of multiple upper valve covers enclose a needle insertion channel extending towards the center of the liquid storage cavity;

[0008] A puncture septum arranged in the gap between the upper valve covers.

[0009] Preferably, a folding cavity for communicating with the catheter is provided on the liquid storage cavity, and when the folding cavity is bent downwards, the distance between the liquid storage cavity and the end of the catheter is minimized.

[0010] Preferably, the folding cavity has a stepped structure, and a bending film is connected between different levels, and the inner diameter of the bending film decreases along the infusion direction.

[0011] Preferably, an elastic ring for supporting the side wall is provided inside the liquid storage cavity.

[0012] Preferably, bending portions for pressing against the inner wall of the folding cavity to lock are provided at both ends of the elastic ring.

[0013] Preferably, a hook tongue is provided at the end of the bending portion, and an inclined surface is provided at the connection between the bending portion and the hook tongue.

[0014] In the above technical solution, an improved venous infusion port provided by the present utility model has the following beneficial effects: Through the structural design of the upper valve cover, when medical staff press the liquid storage cavity, the needle is inserted along the puncture point towards the puncture septum. The inner walls of the tips of multiple upper valve covers enclose an injection channel, so that the needle is guided by the injection channel and is perpendicular to the center of the liquid storage cavity. The tip of the upper valve cover abuts against the needle, assisting the needle to be in a vertical state and preventing deviation, which is beneficial for subsequent liquid infusion. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present utility model, and those of ordinary skill in the art can also obtain other drawings based on these drawings.

[0016] Figure 1 It is an overall three-dimensional schematic diagram provided by an embodiment of the present utility model;

[0017] Figure 2 It is a schematic cross-sectional view of the liquid storage cavity provided by an embodiment of the present utility model;

[0018] Figure 3 It is a schematic diagram of the elastic ring, the bending portion and the hook tongue provided by an embodiment of the present utility model;

[0019] Figure 4 It is a schematic diagram of the state of the liquid storage cavity and the folding cavity in the default state provided by an embodiment of the present utility model;

[0020] Figure 5 It is a schematic diagram of the state of the liquid storage cavity and the folding cavity under extrusion provided by an embodiment of the present utility model.

[0021] Description of the reference numerals:

[0022] 1. Liquid storage cavity; 2. Folding cavity; 21. Bent film; 3. Catheter; 4. Upper valve cover; 5. Puncture septum; 6. Elastic ring; 61. Bent part; 611. Inclined plane; 62. Hook tongue. Detailed implementation mode

[0023] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the present utility model will be further introduced in detail below with reference to the accompanying drawings.

[0024] As Figures 1-5 shown, an improved venous infusion port includes a catheter 3, a liquid storage cavity 1 with an arc-shaped side wall structure, and the side wall is bent downward under pressure so that the liquid storage cavity 1 bulges along its axial diameter direction;

[0025] The upper valve cover 4 arranged in a circumferential array on the liquid storage cavity 1 swings to a horizontal state as the liquid storage cavity 1 bulges, and the inner walls of the tips of multiple upper valve covers 4 enclose a needle insertion channel extending towards the center of the liquid storage cavity 1;

[0026] A puncture septum 5 arranged in the gap of the upper valve cover 4.

[0027] Specifically, when medical staff insert a needle, the thumb, index finger and middle finger of the left hand form a triangle to arch the liquid storage cavity 1, and the center of these three fingers is determined as the puncture point for marking. At this time, the side wall of the liquid storage cavity 1 is bent by the pressure of the medical staff, so that the whole liquid storage cavity 1 bulges along the axial diameter direction, as Figure 5 shown in the state, and drives the upper valve cover 4 fixedly arranged on the side wall edge to swing to the horizontal. At this time, the inner walls of the tips of multiple upper valve covers 4 enclose a needle insertion channel, and this needle insertion channel is the position where the above-mentioned puncture point is located. The medical staff inserts the needle towards the puncture septum 5 along the puncture point, so that the needle is guided by the needle insertion channel and is perpendicular to the center of the liquid storage cavity 1. Even if the needle insertion deviates, the needle will be blocked by the upper valve cover 4 and guided to the needle insertion channel, and the tip of the upper valve cover 4 abuts against the needle, assisting the needle to be in a vertical state and not being skewed, which is beneficial to subsequent liquid infusion.

[0028] In the above technology, through the structural design of the upper valve cover 4, when the medical staff presses the liquid storage cavity 1, insert the needle towards the puncture septum 5 along the puncture point. The inner walls of the tips of multiple upper valve covers 4 enclose a needle insertion channel, so that the needle is guided by the needle insertion channel and is perpendicular to the center of the liquid storage cavity 1. The tip of the upper valve cover 4 abuts against the needle, assisting the needle to be in a vertical state and not being skewed, which is beneficial to subsequent liquid infusion.

[0029] As a further embodiment provided by the present utility model, a folding cavity 2 for communicating with the catheter 3 is arranged on the liquid storage cavity 1, and when the folding cavity 2 is bent downward, the distance between the liquid storage cavity 1 and the end of the catheter 3 is the smallest.

[0030] Specifically, the folding cavity 2 is in a folded state under the default condition. At this time, the distance between the liquid storage cavity 1 and the end of the catheter 3 is the smallest, making the volume of the liquid storage cavity 1 relatively small. When performing an implantation operation, there is no need to make too large an incision. During subsequent nursing, medical staff use the method of flushing the catheter 3 with saline pulses. When the hydraulic pressure during the pulse process is relatively large, since the inlet of the catheter 3 is small, it is difficult to immediately discharge the liquid flow under a relatively large pressure, which will push against the inner wall of the folding cavity 2 and drive the folding cavity 2 to unfold. As a result, part of the hydraulic pressure acts on the folding cavity 2, and at the same time, the unfolding of the folding cavity 2 increases the volume, which will accommodate part of the liquid flow, achieving the effect of decompressing the liquid flow and preventing the liquid medicine with a relatively large hydraulic pressure from directly entering the blood vessel and causing irritation.

[0031] As another embodiment further provided by the present utility model, the folding cavity 2 has a stepped structure, and a bent film 21 is connected between different levels. The inner diameter of the bent film 21 decreases along the infusion direction.

[0032] Specifically, the folding cavity 2 has a stepped structure with multiple levels, and each level is connected by a foldable bent film 21. Under the default condition, the bent film 21 is bent so that all levels of the folding cavity 2 are close to each other, and it unfolds with the push of the hydraulic pressure, enabling the folding cavity 2 to unfold different numbers of levels according to the push of different pressures. Moreover, each level of the folding cavity 2 decreases along the infusion direction, and after unfolding, the cross-section gradually narrows, increasing the flow rate of the liquid flow when it enters the catheter 3 due to the narrowing of the cross-section.

[0033] As another embodiment further provided by the present utility model, an elastic ring 6 for supporting the side wall is provided inside the liquid storage cavity 1.

[0034] Specifically, under the default condition, the liquid storage cavity 1 is not squeezed by the staff and maintains a state with an outwardly convex side wall under the support of the internal elastic ring 6, as Figure 4 shown. When the staff squeezes the liquid storage cavity 1, the elastic ring 6 will deform, as Figure 5 shown. The upper and lower sides of the elastic ring 6 and the side away from the catheter 3 interface are all squeezed; after the infusion is completed, no more liquid enters the liquid storage cavity 1 and it is not squeezed. The elastic ring 6 will recover to the non-squeezed state under its own deformation potential energy and support the liquid storage cavity 1 to return to the default state.

[0035] As another embodiment further provided by the present utility model, bent portions 61 for pressing against the inner wall of the folding cavity 2 to lock are provided at both ends of the elastic ring 6.

[0036] Specifically, under the default condition, the folding cavity 2 is in a folded state, and each level is pulled close to each other by the bent film 21 that is bent, and forms a funnel-shaped structure pointing to the liquid storage cavity 1, as Figure 4In the state shown, the elastic ring 6 supports the inner wall of the liquid storage chamber 1 at this time, so that the bending portion 61 is against the inner wall of the bending membrane 21 closest to the catheter 3, and the folding chamber 2 is locked in the folded state, so as to prevent the folding chamber 2 from being expanded due to external force during transportation, causing the overall volume of the liquid storage chamber 1 to be too large, affecting the incision during implantation. During infusion, the medical staff presses the liquid storage chamber 1 to squeeze the elastic ring 6 to deform the elastic ring 6, and make the two ends of the elastic ring 6 approach each other and no longer conflict with the folding chamber 2, so as to unlock the folding chamber 2 so that the folding chamber 2 can be expanded under the action of the internal pressure. Thereafter, when the medical staff releases the elastic ring 6, since the liquid storage chamber 1 is always under positive pressure in the infusion state, the folding chamber 2 is expanded and is not affected by the bending portion 61.

[0037] As another embodiment further provided by the present invention, a hook tongue 62 is provided at the end of the bent portion 61 , and a slope 611 is provided at the connection between the bent portion 61 and the hook tongue 62 .

[0038] Specifically, the hook tongue 62 is in an arc shape so as to better fit the inner wall of the folding cavity 2 in the bent state, so that the hook tongue 62 locks the folding cavity 2. When the infusion stops, the inside of the liquid storage cavity 1 is no longer under positive pressure, and the elastic ring 6 that has lost the extrusion will recover under its own deformation potential energy, thereby driving the liquid storage cavity 1 to return to the default state, so that the folding cavity 2 returns to the folded state. At this time, the bending membrane 21 bends and approaches the direction of the liquid storage cavity 1. Since the connection between the bending portion 61 and the hook tongue 62 is the inclined surface 611, the inner wall of the bending membrane 21 under the bending is slidably matched with the inclined surface 611, the hook tongue 62 will not affect the bending membrane 21, and is guided to the bending portion 61 by the inclined surface 611, so that the bending membrane 21 is locked with the bending portion 61.

[0039] Working principle: When the medical staff inserts the needle, the thumb, index finger and middle finger of the left hand form a triangle to arch the liquid storage chamber 1, and determine the center of these three fingers as the puncture point for marking. At this time, the side wall of the liquid storage chamber 1 is pressed and bent by the medical staff, so that the liquid storage chamber 1 as a whole bulges along the axial direction, and the two ends of the elastic ring 6 are close to each other and no longer interfere with the folding chamber 2, so that the folding chamber 2 is unlocked, so that the folding chamber 2 can be unfolded under the action of the internal pressure. Figure 5The state shown is driven, and the upper valve cover 4 fixedly arranged at the edge of the side wall is swung to the horizontal. At this time, the inner walls of the tips of multiple upper valve covers 4 enclose a needle insertion channel, and this needle insertion channel is the position where the above-mentioned puncture point is located. Medical staff insert a needle along the puncture point into the puncture septum 5, so that the needle is guided by the needle insertion channel and is perpendicular to the center of the liquid storage cavity 1. Even if the needle insertion deviates, the needle will be blocked by the upper valve cover 4 and be guided into the needle insertion channel. Medical staff use the saline pulse method to flush the catheter 3. When the hydraulic pressure during the pulse process is relatively large, due to the small inlet of the catheter 3, it is difficult to immediately discharge the liquid flow under the relatively large pressure. It will push against the inner wall of the folding cavity 2 and drive the folding cavity 2 to unfold, so that part of the hydraulic pressure acts on the folding cavity 2. At the same time, the unfolding of the folding cavity 2 causes the volume to expand, which will accommodate part of the liquid flow and play an effect of decompressing the liquid flow, enabling the folding cavity 2 to unfold different layers according to different pressures; since the tip of the upper valve cover 4 abuts against the needle during the infusion state, it assists the needle to be in a vertical state. At the same time, the inside of the liquid storage cavity 1 is always under positive pressure, and the folding cavity 2 unfolds without being affected by the bending part 61; when the infusion stops, the inside of the liquid storage cavity 1 is no longer under positive pressure, and the elastic ring 6 without extrusion will recover under its own deformation potential energy, thereby driving the liquid storage cavity 1 to return to the default state, so that the folding cavity 2 returns to the folded state. At this time, the folding film 21 bends and approaches the direction of the liquid storage cavity 1. Since the connection between the bending part 61 and the hook tongue 62 is an inclined surface 611, the inner wall of the bent folding film 21 slides with the inclined surface 611, and the hook tongue 62 does not affect the folding film 21 and is guided to the bending part 61 by the inclined surface 611, and the hook tongue 62 locks the folding cavity 2.

[0040] Only some exemplary embodiments of the present invention are described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the protection scope of the claims of the present invention.

Claims

1. An improved intravenous infusion port, comprising a catheter (3), characterized in that: It comprises a liquid storage chamber (1) whose side wall is an arc structure, and the side wall is bent under pressure so that the liquid storage chamber (1) bulges along its axial direction; An upper valve cover (4) is arranged on the liquid storage chamber (1) in a circular array, and swings to a horizontal state as the liquid storage chamber (1) expands and bulges, and the inner walls of the tips of the plurality of upper valve covers (4) enclose a needle insertion channel extending toward the center of the liquid storage chamber (1); A puncture septum (5) is arranged in the gap of the upper valve cover (4).

2. The improved intravenous infusion port according to claim 1, characterized in that: The liquid storage chamber (1) is provided with a folding chamber (2) for communicating with the catheter (3), and the folding chamber (2) is bent down to minimize the distance between the ends of the liquid storage chamber (1) and the catheter (3).

3. The improved intravenous infusion port according to claim 2, characterized in that: The folding chamber (2) has a stepped structure, and different levels are connected with bending membranes (21), and the inner diameter of the bending membrane (21) decreases along the infusion direction.

4. The improved intravenous infusion port according to claim 1, characterized in that: An elastic ring (6) for supporting the side wall is provided inside the liquid storage chamber (1).

5. The improved intravenous infusion port according to claim 4, characterized in that: Both ends of the elastic ring (6) are provided with bending portions (61) for pressing against the inner wall of the folding cavity (2) to lock it.

6. The improved intravenous infusion port according to claim 5, characterized in that: A hook tongue (62) is provided at the end of the bending portion (61), and an inclined surface (611) is provided at the connection between the bending portion (61) and the hook tongue (62).

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