CN114469272B - Puncture needle with enhanced ultrasonic reflection surface structure - Google Patents
Puncture needle with enhanced ultrasonic reflection surface structure Download PDFInfo
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- CN114469272B CN114469272B CN202111665148.3A CN202111665148A CN114469272B CN 114469272 B CN114469272 B CN 114469272B CN 202111665148 A CN202111665148 A CN 202111665148A CN 114469272 B CN114469272 B CN 114469272B
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- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 28
- 239000010937 tungsten Substances 0.000 claims abstract description 28
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 11
- 239000000956 alloy Substances 0.000 claims abstract description 11
- 230000002093 peripheral effect Effects 0.000 claims abstract description 4
- 238000009713 electroplating Methods 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 18
- LGQLOGILCSXPEA-UHFFFAOYSA-L nickel sulfate Chemical compound [Ni+2].[O-]S([O-])(=O)=O LGQLOGILCSXPEA-UHFFFAOYSA-L 0.000 claims description 15
- 229910000363 nickel(II) sulfate Inorganic materials 0.000 claims description 15
- XMVONEAAOPAGAO-UHFFFAOYSA-N sodium tungstate Chemical compound [Na+].[Na+].[O-][W]([O-])(=O)=O XMVONEAAOPAGAO-UHFFFAOYSA-N 0.000 claims description 15
- 238000007747 plating Methods 0.000 claims description 13
- 230000001965 increasing effect Effects 0.000 claims description 7
- 229910000990 Ni alloy Inorganic materials 0.000 claims description 3
- MOWMLACGTDMJRV-UHFFFAOYSA-N nickel tungsten Chemical group [Ni].[W] MOWMLACGTDMJRV-UHFFFAOYSA-N 0.000 claims description 3
- 238000011161 development Methods 0.000 abstract description 28
- 239000011159 matrix material Substances 0.000 abstract description 15
- 210000005036 nerve Anatomy 0.000 description 13
- 241000080590 Niso Species 0.000 description 12
- 230000008569 process Effects 0.000 description 10
- 238000002604 ultrasonography Methods 0.000 description 9
- 238000003384 imaging method Methods 0.000 description 8
- 239000000243 solution Substances 0.000 description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 206010002091 Anaesthesia Diseases 0.000 description 5
- 230000037005 anaesthesia Effects 0.000 description 5
- 230000003444 anaesthetic effect Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000011734 sodium Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 4
- 230000002708 enhancing effect Effects 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 210000001519 tissue Anatomy 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000002675 image-guided surgery Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 210000004872 soft tissue Anatomy 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 229920002521 macromolecule Polymers 0.000 description 2
- 210000003205 muscle Anatomy 0.000 description 2
- 210000000578 peripheral nerve Anatomy 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 238000001356 surgical procedure Methods 0.000 description 2
- 230000008733 trauma Effects 0.000 description 2
- 206010067484 Adverse reaction Diseases 0.000 description 1
- 102000002322 Egg Proteins Human genes 0.000 description 1
- 108010000912 Egg Proteins Proteins 0.000 description 1
- 208000008589 Obesity Diseases 0.000 description 1
- 230000006838 adverse reaction Effects 0.000 description 1
- 238000004164 analytical calibration Methods 0.000 description 1
- 210000003484 anatomy Anatomy 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000002592 echocardiography Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000020824 obesity Nutrition 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 210000004681 ovum Anatomy 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 230000035807 sensation Effects 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012285 ultrasound imaging Methods 0.000 description 1
- 230000002792 vascular Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 238000012800 visualization Methods 0.000 description 1
Classifications
-
- 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
- A61B17/3401—Puncturing needles for the peridural or subarachnoid space or the plexus, e.g. for anaesthesia
-
- 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
-
- 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
Abstract
The invention discloses a puncture needle with an enhanced ultrasonic reflection surface structure, which is of a circular tube structure with an inner channel, wherein an ultrasonic reflection enhanced dot matrix is arranged on the outer peripheral surface of a needle body close to a needle point, the ultrasonic reflection enhanced dot matrix is formed by uniformly arranging a plurality of triangular pyramid pits, the front side surface of each triangular pyramid pit forms an ultrasonic reflection mirror surface, and the front included angle between the ultrasonic reflection mirror surface and the central axis of the puncture needle is 30-60 degrees; the surface of the needle body of the puncture needle is provided with an alloy layer containing tungsten. By altering the surface structure of the needle, its ability to be developed ultrasonically is improved. Compared with the traditional ultrasonic development technology, the ultrasonic reflection enhanced dot matrix designed by the invention obviously increases the ultrasonic development of the puncture needle, realizes the accurate positioning of the needle point of the puncture needle in operation through ultrasonic development, increases the positioning precision of ultrasonic development, and can obviously reduce the operation risk.
Description
Technical Field
The present invention relates generally to the technical field of medical devices, and more particularly to a needle having an enhanced ultrasound-reflective surface structure.
Background
The puncture needle is mainly used for nerve block operation for anesthesia purpose. The traditional nerve block mainly performs blind detection according to the anatomical marks of the peripheral nerve body surface, determines the target nerve according to the sensation, and then performs effective puncture. Traditional nerve block is often influenced by factors such as obesity, personal anatomical difference, trauma, anatomical variation and the like, so that body surface anatomical marks are unclear, nerve block positions cannot be accurately positioned, anesthetic cannot be injected into ideal nerve block positions, and the block success rate is reduced or the anesthetic effect is not ideal. Aiming at the problem, the method of increasing the dosage of anesthetic or expanding the anesthetic range is adopted clinically to achieve the nerve blocking effect, but adverse events such as adverse reaction of anesthetic and damage to vascular nerves often occur in use. Another nerve block operation mode is to observe the response of the responsible muscle group after the target nerve is subjected to the electric stimulation in the puncturing process by means of an electric stimulator so as to realize puncturing positioning. However, the operation mode has the defects of complicated positioning operation process and need to be tried for a plurality of times, and great discomfort is caused to the body of a patient.
In recent years, along with the continuous development and progress of ultrasonic technology, ultrasonic guidance can be visually positioned, specific anatomical structures of a part to be anesthetized are displayed through images, the specific direction and depth of anesthesia puncture are accurately guided, accurate anesthesia is realized, the anesthesia dosage is reduced, and the occurrence rate of adverse events of anesthesia is reduced, so that ultrasonic guidance is gradually widely applied to nerve block. The image guided surgery technology is an important progress in the medical field, the spatial position information of the surgical instrument can be positioned in real time in the surgery, the three-dimensional spatial structure information of the surgical instrument in a focus area is presented for a doctor, and the doctor can accurately and effectively implement the operation.
The principle of ultrasonic imaging (Ultrasound imaging, US) is that echoes such as reflections, scattering and the like generated by ultrasonic waves passing through human organs are received by an ultrasonic probe to be imaged and displayed. The ultrasonic imaging has the advantages of simple operation, real-time imaging, low price, no radiation and the like, and has wide application in medical diagnosis. In the ultrasound image guided surgery, the calibration of surgical instruments is an indispensable step in the image guided surgery, and spatial position information is known only after the calibration, so that subsequent related work is completed. The precision of the surgical instrument calibration directly affects the overall precision of the entire procedure. In order to avoid significant trauma to the patient during surgery, the diameter of the needle is as small as possible and the detectable ultrasound reflection area is very limited. Moreover, because the requirements of operation and the individual condition of patients have larger difference of puncture angles, the ultrasonic development of the needle point part of the puncture needle is difficult, so that the visualization of the needle point of the puncture needle is a very important but difficult technical problem in peripheral nerve blocking operation under ultrasonic guidance, and the visualized needle point is a problem which needs to be solved urgently in the current ultrasonic guidance nerve blocking operation.
When the puncture needle is in an ultrasonic development, due to the characteristic of reflecting an ultrasonic mirror surface (a reflection angle is equal to an incident angle), reflected waves and the direction of incident waves are not in one direction, and an ultrasonic receiver cannot receive ultrasonic signals reflected by the mirror surface of the puncture needle, as shown in fig. 1. Under the condition, reflected waves of ultrasonic imaging are all from diffuse reflection on the surface of the puncture needle, the ultrasonic development effect of the puncture needle is poor due to low intensity of the reflected waves, a doctor can hardly identify the position of the needle point of the puncture needle, and the operation difficulty and the operation risk are increased.
The invention discloses an ultrasonic development catheter and a forming process, which belong to the technical field of medical appliances, and a reflection concave hole is processed on a soft catheter body to intensively reflect ultrasonic waves, so that the hose can be clearly positioned and tracked by using ultrasonic development equipment.
The invention has disclosed an ultrasonic development conduit of application number CN201510110547, including hollow tube body, the tube body is medical soft conduit, there are fibrous silk of macromolecule material in the tube wall of the tube body, the fibrous silk of macromolecule material is overlapped each other and crossed and formed the netted braided mesh layer, make tube body and braided mesh layer form the ultrasonic development district of different density, thus raise the ultrasonic development ability and help the conduit tip develop.
The invention has disclosed a kind of myoelectricity leading injection needle that can strengthen the ultrasonic development of application number CN201420754040, characterized by that one end near needle point of the said needle tube has structure that can strengthen the ultrasonic development, this structure is concave-convex structure and smooth micro-tooth structure on needle point inclined plane of at least 1 place of regular distribution on needle tube outer surface. The invention increases the ultrasonic reflection area of the injection needle point part through the concave-convex structure, and increases the developability through increasing the intensity of ultrasonic reflection waves, thereby improving the positioning accuracy of muscle groups.
The invention has disclosed an ultrasonic development enhancement puncture needle/dual-cavity ovum taking needle of application number CN201821551080 and CN201821551069, above application through being provided with the ultrasonic development enhancement band set on the outer wall surface of the needle tubing, the ultrasonic development enhancement band is formed by the line type groove group that sets up along the axial of needle tubing, the groove line type is the curve that is periodic variation to make the ultrasonic imaging of puncture needle appear the scale that light and shade alternate, easily operator's art is direct on the display screen of ultrasonic imaging system to observe in real time.
The above-mentioned existing even if the surface is designed with the puncture needle of the reflecting dot matrix, because the reflecting surface in its reflecting dot matrix is not designed according to puncture needle puncture direction and ultrasonic surface included angle while using, therefore, the reflecting dot matrix of its surface has only increased the area that the supersound reflects, can not achieve and obtain the biggest developing effect through the specular reflection of the supersonic wave.
Disclosure of Invention
It is an object of the present invention to provide a lancet having an enhanced ultrasound reflecting surface structure which improves its ability to develop ultrasound by altering the surface structure of the lancet.
According to the puncture needle with the structure for enhancing the ultrasonic reflection surface, the puncture needle is of a circular tube-shaped structure with an inner channel, an ultrasonic reflection enhancing dot matrix is arranged on the outer peripheral surface of the needle body close to the needle point, the ultrasonic reflection enhancing dot matrix is formed by uniformly arranging a plurality of triangular pyramid-shaped pits, the front side surface of each triangular pyramid-shaped pit forms an ultrasonic reflection mirror surface, and the front included angle between the ultrasonic reflection mirror surface and the central axis of the puncture needle is 30-60 degrees; the surface of the needle body of the puncture needle is provided with an alloy layer containing tungsten.
When the puncture needle is used in operation, the included angle between the direction of the puncture needle and the ultrasonic detection surface (ultrasonic generation/receiving surface) is equal to or similar to the front included angle between the ultrasonic reflection mirror surface and the central axis of the puncture needle, and the direction of reflected waves is basically consistent with that of incident waves.
In order to obtain a stable ultrasonic development effect, the inventor performs a great deal of theoretical calculation and experimental verification on design parameters of an ultrasonic reflection enhancement structure, and obtains preferred design parameters: the outer diameter of the puncture needle is 0.3-2.0mm, and the number of pits per week is 4-12; the number of pits per week is gradually increased along with the increase of the outer diameter of the puncture needle, the interval between adjacent pits in the circumferential direction is 0.1-0.4mm, and the side length of the ultrasonic reflection mirror surface is 0.07-0.25 mm. Further, the thickness of the wall of the puncture needle is 1/6-1/4 of the outer diameter, and the distance from the vertex of the triangular pyramid-shaped concave pit to the outer wall in the diameter direction is 1/2 of the thickness of the wall.
The present invention has been further studied from the standpoint of material selection in order to further increase the ultrasound reflection effect of the needle surface. Ultrasound reflection occurs when ultrasound is relayed from human tissue with small acoustic impedance to the tissue/metal interface, with greater reflection at higher impedance of the metal material. Taking a medical puncture needle as an example, the medical puncture needle is widely made of stainless steel materials, the acoustic impedance of the medical puncture needle is about 30 times of that of human soft tissues, obvious reflection effect can occur when ultrasonic waves in the human tissues meet the stainless steel surfaces, the acoustic impedance of nickel is about 35 times of that of the human soft tissues, the acoustic impedance of platinum is about 45 times, and the acoustic impedance of tungsten is about 70 times of that of the human soft tissues. Therefore, tungsten > platinum > nickel > stainless steel from the perspective of the ultrasonic reflective capabilities of the material itself. Therefore, the invention selects the technical route of plating with high tungsten content to improve the ultrasonic reflection capability.
According to the invention, the alloy layer containing tungsten is prepared on the surface of the puncture needle with the ultrasonic reflection enhanced dot matrix by adopting an electroplating method, and a plating solution formula with high tungsten content and good surface quality and an electroplating process are optimized based on the tungsten content in the plating layer and the surface quality of the plating layer.
In specific cases, the alloy layer is tungsten-nickel alloy, and the thickness of the alloy layer is 2-20 mu m.
In particular, the alloy layer containing tungsten is prepared by adopting an electroplating method, and the electroplating solution comprises sodium tungstate (Na 2 WO 4 ) 18.0g/L to 54.0g/L, nickel sulfate (NiSO) 4 ) 2.0 to 6.0g/L; the concentration ratio of the sodium tungstate to the nickel sulfate is 7.0-9.0; the pH value is 4.0-7.0. The current density of the surface of the puncture needle is controlled to be 3.0-18.0A/dm during electroplating 2 The temperature is controlled between 20 and 70 ℃.
Compared with the current ultrasonic development technology of the puncture needle, the invention adopts the enhanced dot matrix with the ultrasonic reflection mirror surface at the needle tip of the puncture needle, increases the positioning precision of ultrasonic development and can obviously reduce the operation risk. When the existing common puncture needle with smooth surface is in a certain included angle with the ultrasonic plane (especially when the angle is larger, such as larger than 20 degrees), the direction of reflected wave and the direction of incident wave are not in one direction, the ultrasonic receiver can not receive the ultrasonic signal reflected by the surface mirror surface of the puncture needle, and under the condition, the reflected wave intensity is usually very low, so that the phenomenon of poor ultrasonic development effect of the puncture needle is easily caused, as shown in fig. 1.
The invention is based on the ultrasonic imaging principle and the characteristics of the existing ultrasonic imaging equipment, and utilizes the reflection characteristics that the reflection angle is equal to the incident angle when the ultrasonic generator and the receiver are designed integrally and the ultrasonic mirror reflection is performed. By altering the surface structure of the needle, its ability to be developed ultrasonically is improved. The ultrasonic reflection enhancement dot matrix is processed on the surface of the puncture needle close to the needle point, wherein an ultrasonic reflection mirror surface designed in the reflection enhancement dot matrix can directly reflect ultrasonic waves to the ultrasonic receiver along the incidence direction, so that the condition that reflected waves cannot be detected by the ultrasonic receiver due to non-right angles between the puncture needle and the incidence direction of the ultrasonic waves is avoided, and the problems of poor developability and the like caused by the condition can be effectively solved. In order to increase the intensity of ultrasonic reflected waves, the invention prepares a coating with high tungsten content on the surface of the puncture needle by using the characteristic that the acoustic impedance of tungsten and the acoustic impedance of human tissues have obvious difference, thereby achieving the aim of increasing the intensity of reflected waves. Compared with the traditional ultrasonic development technology, the ultrasonic reflection enhanced dot matrix designed by the invention obviously increases the ultrasonic development of the puncture needle, realizes the accurate positioning of the needle point of the puncture needle in operation through ultrasonic development, increases the positioning precision of ultrasonic development, and can obviously reduce the operation risk.
Drawings
Fig. 1 is a schematic view of the incident direction and the reflected direction of ultrasonic development of a common puncture needle.
Fig. 2 is a schematic structural view of a puncture needle having an enhanced ultrasound reflecting surface structure according to the present invention.
FIG. 3 is a schematic view of the angle between the ultrasonic reflector surface and the central axis of the puncture needle in FIG. 2.
FIG. 4 is a schematic view showing the puncture angle and incidence and reflection of the puncture needle of the present invention in use.
Detailed Description
The technical scheme of the invention is specifically described below by taking a puncture needle made of stainless steel for nerve block as an example, and the invention is suitable for all ultrasonic guidance puncture needles made of metal, in particular to puncture needles with small diameter and poor ultrasonic development.
Referring to fig. 2 to 4, the puncture needle according to the present invention has a needle body 1, the needle body 1 has a circular tube-shaped structure having an inner passage, and the front end of the needle body 1 is a needle tip 2. An ultrasonic reflection enhancing dot matrix is arranged on the outer peripheral surface of the needle body 1 close to the needle tip 2, and is formed by uniformly arranging a plurality of triangular pyramid-shaped pits 3. The triangular pyramid-shaped pits 3 are in a near-sight regular triangular pyramid shape, and the front side surface of each triangular pyramid-shaped pit 3 forms a smooth ultrasonic reflector surface 4. The front included angle theta between the ultrasonic reflection mirror surface 4 and the central axis 5 of the puncture needle is 30-60 degrees. The front included angle theta can be specifically designed into different specifications of 30 degrees, 45 degrees and 60 degrees, and is selected according to the depth degree of the puncture operation.
The specific process of the puncture needle according to the present invention is as follows.
Step one: the metal tube is processed into a puncture needle tube, and the ultrasonic reflection dot matrix designed by the invention is processed near the position of the needle point through a cone-punching process, and the specific parameters are shown in table 1.
TABLE 1 design parameters of an ultrasound reflection enhanced lattice of a needle of the present invention
Step two: and preparing an alloy coating with high tungsten content on the surface by adopting an electroplating mode. Electroplating is carried out under different plating solution formulas and process conditions, and a tungsten-nickel alloy plating layer is obtained. Observing whether the surface of the plating layer has defects such as foaming, blackening, cracking and the like, and evaluating the surface quality of the plating layer as follows: good, medium, bad. The tungsten content of the coating was tested with EDS. Based on the surface quality of the plating layer and the tungsten content in the plating layer, a suitable electroplating solution formula and electroplating process results are shown in Table 2 (electroplating time is 5 min).
Step three: the puncture needle is made by assembling accessories such as a puncture needle backseat and the like.
Example 1
At ph=7; current density: 12A/dm 2 The method comprises the steps of carrying out a first treatment on the surface of the Temperature: under the condition of 40 ℃, the puncture needle provided with the ultrasonic reflection dot matrixElectroplating, wherein sodium tungstate (Na 2 WO 4 ) With nickel sulfate (NiSO) 4 ) The composition ratio of (2) is 18.0:2.0, 25.5:3.0, 36.0:4.0, 45.0:5.0, 54.0:6.0, 59.5:7.0, 68.0:8.0.
it was detected that when sodium tungstate (Na 2 WO 4 ) With nickel sulfate (NiSO) 4 ) The composition ratio of (2) is 18.0:2.0 to 54.0:6.0, the tungsten (W) content is 36.2-48.3%, and the surface quality is good; sodium tungstate (Na) 2 WO 4 ) With nickel sulfate (NiSO) 4 ) The composition ratio of (3) is 59.5:7.0 to 68.0:8.0, the tungsten (W) content is 50.4-52.1%, and the surface quality is poor.
Example 2
At ph=7; current density: 12A/dm 2 The method comprises the steps of carrying out a first treatment on the surface of the Temperature: electroplating the puncture needle with ultrasonic reflection lattice at 40deg.C, wherein nickel (NiSO 4 ) The mass is unchanged, 5.0g/L, sodium tungstate (Na 2 WO 4 ) With nickel sulfate (NiSO) 4 ) The concentration ratios of (2) were 7.0, 7.5, 8.0, 8.5, 9.0, 9.5, 10.0, respectively.
When sodium tungstate (Na 2 WO 4 ) With nickel sulfate (NiSO) 4 ) When the concentration ratio of (C) is 7.0-8.5, the tungsten (W) content is 32.6-46.4%, the surface quality is good, and the sodium tungstate (Na 2 WO 4 ) With nickel sulfate (NiSO) 4 ) When the concentration ratio is 9.5-10.0, the tungsten (W) content is 48.6-52.1%, and the surface quality is poor.
Example 3
Sodium tungstate (Na) 2 WO 4 ) With nickel sulfate (NiSO) 4 ) The concentration ratio of (2) is 9.0; current density: 12A/dm 2 The method comprises the steps of carrying out a first treatment on the surface of the Temperature: and electroplating the puncture needle provided with the ultrasonic reflection lattice at the temperature of 40 ℃ to observe the quality under different pH conditions, wherein the used pH is 4.0, 5.0, 6.0, 7.0, 8.0 and 9.0.
When the pH value is 4.0-7.0, the tungsten (W) content is 38.0-43.4%, and the surface quality is good; when the pH is 8.0, the tungsten (W) content is 39.4%, and the surface quality is general; at a pH of 9.0, the tungsten (W) content was 37.2%, and the surface quality was poor.
Example 4
Sodium tungstate (Na) 2 WO 4 ) With nickel sulfate (NiSO) 4 ) The concentration ratio of (2) is 9.0; the pH was 7.0; temperature: and electroplating the puncture needle provided with the ultrasonic reflection lattice at the temperature of 40 ℃ to observe the quality under different current densities, wherein the current densities are 3.0, 6.0, 9.0, 12.0, 15.0, 18.0 and 21.0.
Detected that the current density is 3.0-18.0A/dm 2 When the tungsten (W) content is 33.3-49.0%, the surface quality is better; the current density was 21.0A/dm 2 When the tungsten (W) content was 50.4%, the surface quality was poor.
Example 5
Sodium tungstate (Na) 2 WO 4 ) With nickel sulfate (NiSO) 4 ) The concentration ratio of (2) is 9.0; the pH was 7.0; current density: 12A/dm 2 Under the condition, the puncture needle provided with the ultrasonic reflection lattice is electroplated, and the quality under different temperature conditions is observed, wherein the temperature is 10 ℃, 20 ℃, 50 ℃, 70 ℃ and 80 ℃.
The surface quality of the tungsten (W) with the content of 41.63-46.1% is better when the temperature is 20-70 ℃ through detection; tungsten (W) contents were 36.3% and 48.3% at temperatures of 10 ℃ and 80 ℃, with poor surface quality.
In summary, the optimal electroplating solution formulation and electroplating process are: sodium tungstate (Na) 2 WO 4 ) 18.0g/L to 54.0g/L, nickel sulfate (NiSO) 4 ) 2.0 to 6.0g/L; the concentration ratio of the sodium tungstate to the nickel sulfate is 7.0-9.0; the pH value is 4.0-7.0; the current density is controlled to be 3.0-18.0A/dm 2 The temperature is controlled between 20 and 70 ℃.
TABLE 2 tungsten content and surface quality in coatings for different plating bath formulations and plating process parameters
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced equally; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (2)
1. The puncture needle is of a circular tube structure with an inner channel, an ultrasonic reflection enhancement lattice is arranged on the outer peripheral surface of the needle body close to the needle point, the ultrasonic reflection enhancement lattice is formed by uniformly arranging a plurality of triangular pyramid pits, the front side surface of each triangular pyramid pit forms an ultrasonic reflection mirror surface, and the front included angle between the ultrasonic reflection mirror surface and the central axis of the puncture needle is 30-60 degrees; the surface of the needle body of the puncture needle is provided with an alloy layer containing tungsten; the alloy layer is tungsten nickel alloy, and the thickness of the alloy layer is 2-20 mu m;
the outer diameter of the puncture needle is 0.3-2.0mm, and the number of pits per week is 4-12; the number of pits per week is gradually increased along with the increase of the outer diameter of the puncture needle, the interval between adjacent pits in the circumferential direction is 0.1-0.4mm, and the side length of the ultrasonic reflection mirror surface is 0.07-0.25 mm;
the tungsten-containing alloy layer is prepared by adopting an electroplating method, wherein the concentration of the electroplating solution comprises 18.0 g/L-54.0 g/L of sodium tungstate and 2.0-6.0 g/L of nickel sulfate; the concentration ratio of the sodium tungstate to the nickel sulfate is 7.0-8.5; the pH value is 4.0-7.0; the temperature is controlled between 20 ℃ and 40 ℃ during electroplating.
2. The puncture needle according to claim 1, wherein the current density of the surface of the puncture needle is controlled to be 3.0-18.0A/dm under plating control 2 。
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| CN112914697A (en) * | 2021-03-30 | 2021-06-08 | 南昌大学第二附属医院 | Enhanced developing puncture needle for ultrasonically guiding nerve block |
| CN113208709A (en) * | 2021-07-08 | 2021-08-06 | 上海介入医疗器械有限公司 | Development enhanced puncture sheath tube and puncture assembly |
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