CN219271775U - Atraumatic needle for port and port assembly - Google Patents

Abstract

The utility model discloses a nondestructive needle for an infusion port and an infusion port assembly, which comprise a hollow needle tube, wherein the needle tube comprises a section of vertical tube body and a bending part arranged at one end of the tube body, the tail end of the bending part is provided with a needle point, the needle point comprises a first cutting edge surface and two symmetrical second cutting edge surfaces extending from the tail end of the first cutting edge surface, and the second cutting edge surface is a concave cambered surface. According to the scheme, after the needle point generates a hook, the hook cannot protrude out of the needle tube to contact the injection seat, so that falling scraps of the hook are avoided, the injection seat is damaged, and the safety performance is improved. The height of the needle point is reduced, so that the height of a liquid storage cavity of the transfusion port can be synchronously reduced, the total height of the transfusion port is reduced by reducing the height of the liquid storage cavity, the extrusion abrasion of the transfusion port to tissues is relieved, foreign body sensation and complications are reduced, and the comfort level of a patient is improved; meanwhile, the needle point is short, the extrusion of the inclined plane angle to the injection seat is small, and the penetration force and the extraction force of the atraumatic needle penetrating the injection seat are correspondingly reduced.

Description

Atraumatic needle for port and port assembly

Technical Field

The utility model relates to the field of medical equipment, in particular to a nondestructive needle for an infusion port and an infusion port assembly.

Background

The non-invasive needle is used for transfusion administration, and is matched with the transfusion port base for use, and the liquid medicine is input into the body of a patient through the non-invasive needle and the transfusion port to treat the disease of the patient. In practical clinic, after the transfusion harbor is implanted into subcutaneous tissue of a human body, the region of the puncture area of the transfusion harbor injection seat cannot be directly seen due to shielding of skin tissue, and the transfusion harbor injection seat can only be punctured through hand palpation sensing; simultaneously, medical personnel pass injection seat through the atraumatic needle and get into the stock solution chamber, wear to stock solution chamber bottom, and the needle point touches the bottom perception and judges that the atraumatic needle punctures in place. However, because the needle tip needs to be prevented from being pricked into the bottom of the liquid storage cavity, the bottom of the liquid storage cavity is usually made of a relatively hard material, after the needle tip is blocked from touching the bottom, the needle tip can be curled forward or backward to form a front hook or a rear hook, when the atraumatic needle needs to be replaced and removed, if the hook protrudes out of the needle tip, cutting can be generated on the injection seat, scraps can be hooked out, the injection seat is damaged, when different patient physique, implantation positions and implantation depth are met, the puncture force is changed, the size of the hook formed by the needle tip is different, and the damage degree to the injection seat is also different. A series of complications such as drug extravasation, tissue ulceration in a puncture area, acceleration of thrombus in a catheter and a port seat can occur after the injection seat is damaged.

Disclosure of Invention

Accordingly, in order to solve the above-mentioned problems, the present utility model provides a atraumatic needle for an infusion port and an assembly for an infusion port.

The utility model is realized by the following technical scheme:

the utility model provides a non-invasive needle for transfusion harbor, includes hollow needle tubing, the needle tubing includes one section vertically body and sets up the kink of body one end, the axis of kink with contained angle alpha = 12 ± 2 between the axis of body, the end of kink is provided with the needle point, the needle point includes first cutting edge face and certainly two symmetrical second cutting edge faces that extend at first cutting edge face end, the second cutting edge face is concave cambered surface.

Preferably, the first blade surface is a bevel, the inclination direction of the bevel is opposite to the bending direction of the bending part, the plane of the first blade surface is tangential to the axis of the bending part, and an included angle gamma=10° ±2° between the plane of the first blade surface and the axis of the bending part.

Preferably, the junction of the ends of the two second facets forms a tip having a tip angle β=30° ±2° in longitudinal cross-section.

Preferably, the difference between the distance d1 between the cutting start point of the first blade surface and the axis of the needle tube and the distance d2 between the highest point of the blade tip and the axis of the needle tube is greater than or equal to the height of the blade tip.

Preferably, the height of the needle tip is smaller than or equal to that of the bending part, and the ratio of the height of the first cutting surface to the height of the second cutting surface is 3:2.

Preferably, an infusion channel is arranged in the needle tube, and the tube body is consistent with the tube wall thickness of the bending part.

An infusion port assembly comprising a atraumatic needle for an infusion port as described above.

Preferably, the height of the bending part of the atraumatic needle for the transfusion harbor is smaller than the height of the liquid storage cavity of the transfusion harbor.

The technical scheme of the utility model has the beneficial effects that:

1. through setting up the first cutting edge face that the slope is opposite with the bending direction of kink and sunken second cutting edge face be the front crotch reservation position that produces after the needle point touches the end, the inclination of kink is the back crotch reservation position that produces after the needle point touches the end simultaneously, when guaranteeing that the atraumatic needle pulls out the transfusion harbor, can not bulge outside the needle tubing and contact the injection seat behind the needle point produces the crotch, produces the cutting to the injection seat, hooks out the bits, damage injection seat, improves the security performance.

2. In the transfusion port assembly, the height of the bending part of the non-invasive needle is lower than that of the liquid storage cavity in the transfusion port, the height of the bending part is reduced, the extrusion of the inclined plane angle to the injection seat is also reduced, and meanwhile, the height of the needle point is reduced, so that the penetration force and the extraction force of the non-invasive needle to puncture the injection seat are correspondingly reduced; correspondingly, the nondestructive needle with low bending part height can be also suitable for the transfusion port with low height, so that the extrusion abrasion of the transfusion port to tissues is relieved, foreign body sensation and complications are reduced, and the comfort level of a patient is improved.

Drawings

FIG. 1 is a partial front view of a atraumatic needle for an infusion port;

FIG. 2 is an enlarged view of the portion of FIG. 1A;

FIG. 3 is a partial cross-sectional view of a atraumatic needle for use with an infusion port;

FIG. 4 is an enlarged view of the portion of FIG. 3B;

FIG. 5 is a diagram showing the state of the intact needle for the port of infusion according to the present utility model in comparison with the state of the existing intact needle penetrating in the port of infusion;

FIG. 6 is a schematic view of the structure of the port assembly.

Detailed Description

So that the objects, advantages and features of the present utility model can be more clearly and specifically set forth, a more particular description of the preferred embodiments will be rendered by the following non-limiting description thereof. The embodiment is only a typical example of the technical scheme of the utility model, and all technical schemes formed by adopting equivalent substitution or equivalent transformation fall within the scope of the utility model.

It is also stated that, in the description of the aspects, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "front", "rear", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like in this description are used for descriptive purposes only and are not to be construed as indicating or implying a ranking of importance, or as implicitly indicating the number of technical features shown. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the present utility model, the meaning of "plurality" means two or more, unless specifically defined otherwise.

The utility model discloses a non-invasive needle for an infusion port, as shown in figures 1-4, comprising a hollow needle tube 10, wherein the needle tube 10 comprises a section of vertical tube body and a bending part 9 arranged at one end of the tube body, an infusion channel is arranged in the needle tube 10, the tube body is consistent with the thickness of the tube wall of the bending part, the diameter of the infusion channel in the needle tube 10 is consistent, the stable output of liquid medicine from the needle tube 10 is ensured, as shown in figure 4, an included angle alpha=12 DEG +/-2 DEG between the axis of the bending part and the axis of the tube body, in a preferred embodiment, an included angle alpha=12 DEG between the axis of the bending part 9 and the axis of the tube body is provided with a needle point, the length of the needle point extends from the end of the bending part 9 to a bending point between the bending part 9 and the needle tube 10 at the longest, as shown in fig. 2 and 4, the needle tip comprises a first cutting surface 1 and two symmetrical second cutting surfaces 2 extending from the tail end of the first cutting surface 1, the first cutting surface 1 is a bevel, the inclination direction of the bevel is opposite to the bending direction of the bending part 9, as shown in fig. 4, the plane of the first cutting surface 1 is tangential to the axis of the bending part 9, the included angle gamma=10° plus or minus 2 degrees between the plane of the first cutting surface 1 and the axis of the bending part 9, the second cutting surface 2 is a concave arc surface, the second cutting surface 2 is concave towards the inner direction of the infusion channel, in particular, after the needle penetrates into the injection seat, a needle path is formed in the injection seat without damage, the first cutting surface 1 and the second cutting surface 2 are arranged on one side of the bending part 9 close to the bending direction, so that the bending distance of the bending part 9 is reduced, the extrusion of the bevel angle to the inner wall of the needle track is reduced.

The height of the needle point is smaller than or equal to that of the bending part, and the ratio of the height of the first cutting edge surface to the height of the second cutting edge surface is 3:2.

As shown in fig. 2 and 4, the boundary between the ends of the two second blade surfaces 2 forms a blade tip 5, the difference between the distance d1 between the cutting start point of the first blade surface 1 and the axis of the needle tube and the distance d2 between the highest point of the blade surface 5 and the axis of the needle tube is greater than or equal to the height of the blade tip 5, because the inclination direction of the first blade surface 1 is opposite to the bending direction of the bending part 9, the cutting start point of the first blade surface 1 is the part with the farthest radial distance between the bending part 9 and the axis of the tube body, when the needle is not damaged and pulled out of the transfusion port, the cutting start point of the first blade surface protrudes outwards and presses the needle path, when the needle tip 5 is bent towards the direction of the first blade surface 1, the difference between the distance d1 between the cutting start point of the first blade surface and the axis of the needle tube and the distance d2 between the highest point of the blade surface 5 and the axis of the needle tube is greater than or equal to the height of the blade tip 5, and the maximum length of the blade surface 5 is the bending direction of the bending part, therefore the cutting start point of the blade surface is not damaged, when the needle tip 5 is bent, the needle tip 5 is not damaged, and the hook is not bent, and the hook is not damaged, and the hook is not bent, when the hook is formed is bent, and the hook is not bent.

The distance between the bending point of the bending part 9 of the atraumatic needle and the axis of the needle tube is larger than or equal to the height of the cutting tip 5, when the cutting tip 5 bottoms out and bends in the direction opposite to the bending direction of the bending part, the formed back hook will not exceed the bending point, therefore, when the cutting tip 5 bottoms out and bends in the direction of the bending point, the back hook will not contact the inner wall of the needle tract when the atraumatic needle is pulled out, and no falling scraps will be formed

As shown in fig. 4, the angle β=30° ±2° of the blade tip 5 in the longitudinal section, the magnitude of the angle β of the blade tip 5 in the longitudinal section represents the thickness of the blade tip 5, and when the angle β of the blade tip 5 in the longitudinal section is too small, the overall thickness of the blade tip 5 is thinner, the length of the blade tip 5 is longer, and the blade tip 5 is easy to bend when bottoming, forming a hook, and meanwhile, the length of the hook is longer, and the hook is easy to contact the inner wall of the needle tract to form scraps; when the cutting edge angle of the cutting edge 5 on the longitudinal section is overlarge, the thickness of the cutting edge 5 is thicker, the cutting edge 5 is blunter, not sharp enough and is unfavorable for puncturing, when the cutting edge angle beta=30+/-2 DEG of the cutting edge 5 on the longitudinal section, the cutting edge 5 is not easy to form a hook when bottoming, and meanwhile, the sharpness of the cutting edge 5 can be ensured, so that puncturing and cutting are facilitated.

The utility model also discloses an infusion port assembly 8, as shown in fig. 5 and 6, which comprises the non-invasive needle for the infusion port, as shown in fig. 5, wherein the left side is the non-invasive needle for the infusion port, a is the height of the bending part of the non-invasive needle for the infusion port, b is the height of the liquid storage cavity, the height of the bending part 9 of the non-invasive needle for the infusion port is smaller than the height of the liquid storage cavity 7 of the infusion port, so that the bending part 9 is completely immersed into the liquid storage cavity 7 after the non-invasive needle penetrates into the infusion port, and on one hand, the bending distance of the bending part is reduced by reducing the height of the bending part 9, and the extrusion of an inclined plane angle to the injection seat 6 is reduced; on the other hand, the reduction in the height of the bent portion 9 shortens the needle tip; the puncture needle 100 of the prior art on the right and the puncture needle 100 of the prior art on the c are the bent parts of the puncture needle 100 of the prior art, the bent parts of the puncture needle 100 of the prior art are higher than the liquid storage cavities 7 of the transfusion ports, the bent points of the bent sections stay in the injection seat 6 during the transfusion process, the extrusion force is generated on the injection seat, the sealing performance of the transfusion ports during the transfusion process is reduced, correspondingly, the height of the liquid storage cavities in the transfusion ports can be properly reduced, the extrusion abrasion of the transfusion ports to tissues can be relieved when the transfusion ports are implanted into subcutaneous tissues, foreign body sensation and complications are reduced, and the comfort of patients is improved

The utility model has various embodiments, and all technical schemes formed by equivalent transformation or equivalent transformation fall within the protection scope of the utility model.

Claims (8)

1. The atraumatic needle for the transfusion port is characterized in that: including hollow needle tubing, the needle tubing includes one section vertically body and sets up the kink of body one end, the axis of kink with contained angle alpha = 12 ± 2 between the axis of body, the end of kink is provided with the needle point, the needle point includes first cutting edge face and certainly two symmetrical second cutting edge faces that extend at first cutting edge face end, the second cutting edge face is concave cambered surface.

2. The atraumatic needle for an infusion port of claim 1, wherein: the first cutting edge surface is a bevel, the inclination direction of the bevel is opposite to the bending direction of the bending part, the plane of the first cutting edge surface is tangent to the axis of the bending part, and an included angle gamma=10° +/-2 DEG is formed between the plane of the first cutting edge surface and the axis of the bending part.

3. The atraumatic needle for an infusion port of claim 2, wherein: the junction of the ends of the two second facets forms a tip with a tip angle β=30° ±2° in longitudinal section.

4. The atraumatic needle for an infusion port of claim 3, wherein: the difference between the distance d1 between the cutting start point of the first blade surface and the axis of the needle tube and the distance d2 between the highest point of the blade tip and the axis of the needle tube is larger than or equal to the height of the blade tip.

5. The atraumatic needle for an infusion port of claim 1, wherein: the height of the needle point is smaller than or equal to that of the bending part, and the ratio of the height of the first cutting edge surface to the height of the second cutting edge surface is 3:2.

6. The atraumatic needle for an infusion port of claim 1, wherein: the needle tube is internally provided with an infusion channel, and the tube body is consistent with the tube wall thickness of the bending part.

7. Infusion port subassembly, its characterized in that: a atraumatic needle for an infusion port comprising any one of claims 1-6.

8. The port assembly of claim 7, wherein: the height of the bending part of the atraumatic needle for the transfusion harbor is smaller than the height of the liquid storage cavity of the transfusion harbor.

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