CN108938055B - Central venous puncture needle - Google Patents
Central venous puncture needle Download PDFInfo
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- CN108938055B CN108938055B CN201810797290.5A CN201810797290A CN108938055B CN 108938055 B CN108938055 B CN 108938055B CN 201810797290 A CN201810797290 A CN 201810797290A CN 108938055 B CN108938055 B CN 108938055B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3403—Needle locating or guiding means
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/06—Measuring instruments not otherwise provided for
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3403—Needle locating or guiding means
- A61B2017/3413—Needle locating or guiding means guided by ultrasound
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
- A61B2017/3454—Details of tips
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/06—Measuring instruments not otherwise provided for
- A61B2090/062—Measuring instruments not otherwise provided for penetration depth
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- Health & Medical Sciences (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
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- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
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- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention discloses a central venous puncture needle, belongs to the technical field of medical equipment, and solves the technical problem that the needle point position, the needle point bevel direction and the needle inserting depth of a puncture needle cannot be accurately determined in the prior art. The central venous puncture needle comprises a needle point, a developing needle body, a smooth needle body and a needle seat which are connected in sequence; the peripheral surface of the developing needle body is provided with a plurality of needle body bulges; the smooth needle body is provided with a scale along the axial direction; the peripheral surface of the needle base is provided with a needle base bulge, and the axis of the needle base bulge, the axis of the smooth needle body and the axis vertical to the needle point inclined plane are coplanar. The central venipuncture needle can be used for central venipuncture.
Description
Technical Field
The invention relates to medical equipment, in particular to a central venous puncture needle.
Background
The ultrasonic instrument can develop deep tissues and blood vessels, and can perform central vein puncture under the guidance of ultrasonic, so that the test-on times of the central vein of a patient, particularly a patient with poor blood vessel access condition, can be reduced, and the ultrasonic instrument has important significance in reducing puncture complications of the patient.
However, in the prior art, when the operator performs the central venous puncture, the operator can only rely on the individual subjective judgment of the needle point bevel direction and the needle insertion depth, thereby increasing the difficulty and risk of the puncture.
In addition, the traditional central venous puncture needle is made of stainless steel materials, the reflection of ultrasonic waves is uniform, the needle point of the central venous puncture needle is developed and does not protrude on a display of an ultrasonic instrument and cannot be distinguished from a needle body, so that a clinician cannot determine the puncture direction and the needle point position of the puncture needle, and the difficulty and the risk of puncture are increased.
Disclosure of Invention
In view of the analysis, the invention provides the central venous puncture needle suitable for being guided by ultrasonic, and solves the technical problems that the needle point position, the needle point bevel direction and the needle inserting depth of the puncture needle cannot be accurately determined in the prior art.
The purpose of the invention is mainly realized by the following technical scheme:
the invention provides a central venous puncture needle, which comprises a needle point, a developing needle body, a smooth needle body and a needle seat which are connected in sequence; the peripheral surface of the developing needle body is provided with a plurality of needle body bulges; the smooth needle body is provided with a scale along the axial direction; the peripheral surface of the needle base is provided with a needle base bulge, and the axis of the needle base bulge, the axis of the smooth needle body and the axis vertical to the needle point inclined plane are coplanar.
On the basis of the scheme, the invention is further improved as follows:
furthermore, one end of the peripheral surface of the developing needle body, which is close to the needle point, is provided with a transition bulge.
Furthermore, one side of the transition bulge close to the needle point is an arc surface.
Further, the diameter of the needle tip is larger than that of the developing needle body.
Furthermore, one end of the needle tip close to the developing needle body is provided with a needle tip chamfer.
Further, the smooth needle body has a diameter greater than the needle tip.
Furthermore, one end of the smooth needle body, which is close to the developing needle body, is provided with a needle body chamfer.
Further, the convex shape of the needle body is a triangular cone.
Further, in the circumferential direction and the axial direction of the developing needle body, the bottom surface triangles of the adjacent two needle body bulges have the following relationship: one of the base triangles is rotated 180 degrees around its center to obtain the other base triangle.
Further, the length of developing needle body and the total length of smooth needle body and developing needle body are than 1 ~ 8: 100.
compared with the prior art, the invention has the following beneficial effects:
a) the invention provides a central venous puncture needle, wherein a plurality of needle body bulges are arranged on the peripheral surface of a developing needle body. In the test of supersound appearance, because the development effect on inclined plane is higher than the cambered surface, so the bellied development effect of needle body is higher than smooth needle body to can strengthen the development effect of developing the needle body, improve the image definition of developing the needle body, make operating personnel can accurately judge above-mentioned central vein pjncture needle's puncture direction and needle point position, reduce central vein pjncture needle's the degree of difficulty and risk.
b) According to the central venous puncture needle provided by the invention, the needle seat bulge is arranged on the peripheral surface of the needle seat, so that the corresponding relation is established between the needle seat bulge and the direction of the needle hole, when the central venous puncture is carried out, an operator can know the direction of the needle hole at any time according to the position and the angle of the needle seat bulge, the direction of the guide wire can be conveniently adjusted, and the difficulty in controlling the running direction of the guide wire is reduced.
c) According to the central venous puncture needle provided by the invention, the smooth needle body is provided with the scale along the axial direction. When the central venous puncture is carried out, an operator can know the needle insertion depth in real time through the ruler and combine the depth of the target blood vessel displayed on the ultrasonic instrument, so that the risk of mistakenly puncturing the artery and other deep tissues is reduced.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout.
FIG. 1 is a schematic view of one embodiment of a central venipuncture needle according to the present invention;
FIG. 2 is another schematic structural view of a central venipuncture needle in accordance with a first embodiment of the present invention;
fig. 3 is a schematic view showing the development of the development needle body in the central venous puncture needle according to the first embodiment of the present invention.
Reference numerals:
1-a needle tip; 2-a developing needle body; 3-smooth needle body; 4-needle seat; 5-the needle body is convex; 6-the needle seat is raised; 7-transition bulge.
Detailed Description
The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form a part hereof, and which together with the embodiments of the invention serve to explain the principles of the invention.
Example one
The embodiment provides a central venous puncture needle, which comprises a needle point 1, a developing needle body 2, a smooth needle body 3 and a needle seat 4 which are connected in sequence, wherein the peripheral surface of the developing needle body 2 is provided with a plurality of needle body bulges 5; the smooth needle body 3 is provided with a scale (in centimeters) along the axial direction; the peripheral surface of the needle seat 4 is provided with a needle seat bulge 6, the axial line of the smooth needle body 3 and the axial line vertical to the inclined plane of the needle point 1 are coplanar, namely, the needle seat bulge 6 is arranged at the position of the side surface of the needle seat 4 corresponding to the needle hole of the needle point 1.
The smooth is that the roughness of the smooth needle body 3 is smaller than that of the developer needle body 2 with respect to the developer needle body 2.
When the central venipuncture is performed, the needle seat 4 is connected with the injector, the ultrasonic instrument can detect the position of the needle body bulge 5 in real time, and the specific position of the needle point 1 can be judged according to the position of the needle body bulge 5 by display operators, so that the accurate central venipuncture is realized.
Compared with the prior art, the central venous puncture needle provided by the embodiment has the advantages that the plurality of needle body bulges 5 are arranged on the peripheral surface of the developing needle body 2. In the test of supersound appearance, because the development effect on inclined plane is higher than the cambered surface, so the development effect of needle body arch 5 is higher than smooth needle body 3 to can strengthen the development effect of development needle body 2, improve the image definition of development needle body 2, make operating personnel can accurately judge the puncture direction and the needle point 1 position of above-mentioned central vein pjncture needle, reduce the degree of difficulty and the risk of central vein puncture.
Meanwhile, in the central venous puncture needle, the smooth needle body 3 is provided with the scale along the axial direction, when the central venous puncture is performed, an operator can know the needle insertion depth in real time through the scale and combine the depth of a target blood vessel displayed on the ultrasonic instrument, and therefore the risk of mistakenly puncturing the artery and other deep tissues is reduced.
In addition, in above-mentioned central vein pjncture needle, the outer peripheral face of needle file 4 is equipped with needle file arch 6 to, needle file arch 6 locate the side of needle file 4, with the pinhole corresponding position of needle point 1, established corresponding relation between needle file arch 6 and the pinhole direction, when the central vein puncture, operating personnel can know the direction of pinhole at any time according to the protruding 6 position of needle file and angle, the direction of being convenient for adjust the seal wire and putting into reduces the degree of difficulty that the control seal wire walked the direction.
Considering that in the central venipuncture process, the direction of the needle hole needs to be continuously adjusted, and the problem that the scales back to the operator exists, therefore, the number of the scales can be two, and the two scales are symmetrically arranged relative to the axis of the smooth needle body 3. Thus, even if the direction of the pinhole is continuously adjusted, at least one of the two scales can be ensured to face the operator.
Considering that the developing needle body 2 may damage the blood vessel when passing through the blood vessel, a transition protrusion 7 may be provided at one end of the outer circumferential surface of the developing needle body 2 near the needle point, as shown in fig. 1, in order to reduce the damage to the blood vessel. The transition projection 7 can appropriately enlarge the puncture hole of the blood vessel, and appropriately reduce the damage to the blood vessel when the development needle body 2 passes through the blood vessel.
In order to further reduce the damage to the blood vessel, one side of the transition bulge 7 close to the needle point is a cambered surface. Because the side that the transition arch 7 is close to the needle point is the cambered surface, in the puncture process, the cambered surface can improve the smoothness that the needle point passes through to the development arch, and in addition, the cambered surface can be appropriate the puncture hole of expansion blood vessel, when development needle body 2 passes through the blood vessel, can suitably reduce the damage that causes the blood vessel.
In order to further avoid the excessive damage to the blood vessel caused by the excessive height of the needle body projection 5, the height of the needle body projection 5 relative to the outer peripheral surface of the developing needle body 2 should be controlled to be 0.05-0.15 mm, for example, 0.1 mm. The height of the needle body bulge 5 relative to the peripheral surface of the development needle body 2 is controlled within the range, so that the development effect of the development needle body 2 can be improved on the premise of ensuring that the blood vessel is not excessively damaged, and the image definition of the development needle body 2 is further improved.
Also, in order to reduce damage of the needle boss 5 to the blood vessel, the needle tip 1 may have a larger diameter than the development needle body 2, as shown in fig. 2. Thus, when the needle tip 1 passes through a blood vessel, the diameter of the puncture hole of the blood vessel can be enlarged appropriately; then, when the development needle body 2 provided with the needle body projection 5 passes through the blood vessel, since the diameter of the development needle body 2 is smaller than that of the needle point 1, irregular damage of the needle body projection 5 to the blood vessel can be reduced.
In order to make the blood vessel smoothly transit from the needle tip 1 to the developer needle body 2, one end of the needle tip 1 near the developer needle body 2 may be provided with a needle tip chamfer, for example, a circular-arc-shaped needle tip chamfer. The setting of needle point chamfer is equivalent to setting up the changeover portion at needle point 1 near the one end of development needle body 2 for the puncture hole of blood vessel can be followed the great needle point 1 of diameter and passed gradually to the less development needle body 2 of diameter, avoids the diameter difference to lead to the right angle or the sharp corner that produces at needle point 1 one end near development needle body 2.
It should be noted that the diameter of the needle tip 1 is larger than that of the developer needle body 2, once the smooth needle body 3 has poor fitting property with the wall of the puncture hole of the blood vessel, blood leakage from the blood vessel is easily caused, and therefore, the diameter of the smooth needle body 3 may be larger than that of the needle tip 1, that is, the diameter of the smooth needle body 3, the diameter of the needle tip 1 and the diameter of the developer needle body 2 are sequentially decreased. Like this, when smooth needle body 3 passes through the blood vessel, for needle point 1, smooth needle body 3 can further suitably enlarge the diameter of the puncture hole of blood vessel for the puncture hole pore wall of blood vessel can closely laminate with smooth needle body 3, thereby avoids the blood leakage of blood vessel.
Similarly, in order to smoothly transit the blood vessel from the developing needle body 2 to the smooth needle body 3, a needle body chamfer may be provided at an end of the smooth needle body 3 close to the developing needle body 2, so that the blood vessel can smoothly transit from the developing needle body 2 to the smooth needle body 3.
In order to further enhance the developing effect, the needle body protrusion 5 may be in the shape of a triangular pyramid or a quadrangular pyramid, and the reflecting surface thereof is three or four planes, while in general, the smooth needle body 3 is in the shape of a cylinder, and the outer peripheral surface thereof is an arc surface, so that the image definition of the developing needle body 2 is significantly higher than that of the smooth needle body 3 because the ultrasonic reflection to the plane is stronger than that of the arc, and the ultrasonic instrument can detect a clear image with better developing effect from at least three directions.
In order to ensure the developing effect of the ultrasonic instrument from multiple directions, the shape of the needle body bulge 5 can be a triangular cone, and the bottom surface triangles of two adjacent needle body bulges 5 have the following relations in the circumferential direction and the axial direction of the developing needle body 2: one of the base triangles is rotated 180 about its center to obtain the other base triangle, as shown in fig. 3. Two adjacent needle body protruding 5 have six planes that the orientation is different to can guarantee that the ultrasonic apparatus detects all to have good development effect from a plurality of directions.
In order to ensure the image uniformity of the developer needle body 2, the plurality of needle body protrusions 5 should be uniformly distributed on the outer circumferential surface of the developer needle body 2. In the central venipuncture in-process, operating personnel need constantly adjust the puncture direction, and the protruding 5 evenly distributed of a plurality of needle bodies can guarantee the image homogeneity of development needle body 2, and then can guarantee towards the image definition of the development needle body 2 of supersound appearance in the test of supersound appearance.
Consider that the development needle body 2 process can influence the smooth and easy of central venipuncture, avoid the length of development needle body 2 to increase the risk of excessive damage of blood vessel, the length of above-mentioned development needle body 2 can be 1 ~ 8 with the ratio of smooth needle body 3 and the overall length of development needle body 2: 100 (e.g., 5: 100). The reason is that the roughness of the developing needle body 2 can be increased due to the arrangement of the needle body bulge 5, and the roughness of the whole puncture needle can be relatively increased due to the overlong length of the developing needle body 2, so that the smoothness of central venipuncture is influenced; however, the developing needle body 2 is too short, and the development effect is not significantly increased, which results in an increase in difficulty for the operator to determine the puncture direction of the puncture needle and the position of the needle point 1.
Illustratively, when the total length of the smooth needle body 3 and the developing needle body 2 is 10cm, the length of the developing needle body 2 may be controlled to be 0.1 to 0.8 cm.
In order to further improve the smoothness of the puncture process, the included angle between the inclined plane of the needle point and the axis of the smooth needle body 3 is 10-15 degrees, and exemplarily 10-12 degrees. Because the included angle between the inclined plane of the needle point and the axis of the smooth needle body 3 is smaller, the puncture of the blood vessel is facilitated, and the smoothness of the puncture process is improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (3)
1. A central venous puncture needle is characterized by comprising a needle point, a developing needle body, a smooth needle body and a needle seat which are connected in sequence;
the peripheral surface of the developing needle body is provided with a plurality of needle body bulges;
the smooth needle body is provided with a scale along the axial direction;
the outer peripheral surface of the needle base is provided with a needle base bulge, the axis of the smooth needle body and the axis vertical to the needle point inclined plane are coplanar, and the needle base bulge is arranged on the side surface of the needle base and at a position corresponding to the needle hole of the needle point; the convex shape of the needle body is a triangular cone; the height of the needle body protrusion relative to the peripheral surface of the developing needle body is 0.05-0.15 mm;
one end of the peripheral surface of the developing needle body, which is close to the needle point, is provided with a transition bulge;
one side of the transition bulge close to the needle point is an arc surface;
the diameter of the needle point is larger than that of the developing needle body; the diameter of the smooth needle body is larger than that of the needle point;
in the circumferential direction and the axial direction of the developing needle body, the bottom surface triangles of the two adjacent needle body bulges have the following relations: one of the base triangles rotates 180 degrees around its center°Obtaining another bottom surface triangle;
the length of developing needle body and the total length of smooth needle body and developing needle body than is 1 ~ 8: 100, respectively;
the included angle between the inclined plane of the needle point and the axis of the smooth needle body is 10-15 degrees;
the number of the scales is two, and the two scales are symmetrically arranged relative to the axis of the smooth needle body;
the plurality of needle body bulges are uniformly distributed on the peripheral surface of the developing needle body.
2. The central venipuncture needle according to claim 1, wherein one end of the needle tip near the development needle body is provided with a needle tip chamfer.
3. The central venipuncture needle according to claim 1, wherein one end of the smooth needle body near the development needle body is provided with a needle body chamfer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810797290.5A CN108938055B (en) | 2018-07-19 | 2018-07-19 | Central venous puncture needle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810797290.5A CN108938055B (en) | 2018-07-19 | 2018-07-19 | Central venous puncture needle |
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| CN108938055A CN108938055A (en) | 2018-12-07 |
| CN108938055B true CN108938055B (en) | 2021-05-28 |
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| CN201404275Y (en) * | 2009-04-22 | 2010-02-17 | 广州中医药大学 | Anti-cutting guide type puncture needle |
| WO2014149821A1 (en) * | 2013-03-14 | 2014-09-25 | Mufin Incorporated | Echogenic surface using reuleaux triangle |
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| CN205994552U (en) * | 2016-07-05 | 2017-03-08 | 河南驼人医疗器械集团有限公司 | One kind is used for ultrasonically enhanced nerve block pin |
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