CN111719113B - Surface modification method of acupuncture needle - Google Patents
Surface modification method of acupuncture needle Download PDFInfo
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- CN111719113B CN111719113B CN201910236894.7A CN201910236894A CN111719113B CN 111719113 B CN111719113 B CN 111719113B CN 201910236894 A CN201910236894 A CN 201910236894A CN 111719113 B CN111719113 B CN 111719113B
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- 238000001467 acupuncture Methods 0.000 title claims abstract description 161
- 238000002715 modification method Methods 0.000 title claims abstract description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 62
- -1 nitrogen-containing compound Chemical class 0.000 claims abstract description 34
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 31
- 239000012530 fluid Substances 0.000 claims abstract description 23
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 24
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 15
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 12
- 239000001569 carbon dioxide Substances 0.000 claims description 12
- 238000003672 processing method Methods 0.000 abstract description 5
- 230000035807 sensation Effects 0.000 description 13
- 230000000694 effects Effects 0.000 description 10
- 238000002560 therapeutic procedure Methods 0.000 description 10
- 230000000007 visual effect Effects 0.000 description 10
- 238000002474 experimental method Methods 0.000 description 8
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 238000011156 evaluation Methods 0.000 description 6
- 231100000862 numbness Toxicity 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 2
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001827 electrotherapy Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 230000001225 therapeutic effect Effects 0.000 description 2
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- 241000208202 Linaceae Species 0.000 description 1
- 235000004431 Linum usitatissimum Nutrition 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 229960001730 nitrous oxide Drugs 0.000 description 1
- 235000013842 nitrous oxide Nutrition 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/24—Nitriding
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
- A61H39/00—Devices for locating or stimulating specific reflex points of the body for physical therapy, e.g. acupuncture
- A61H39/08—Devices for applying needles to such points, i.e. for acupuncture ; Acupuncture needles or accessories therefor
- A61H39/086—Acupuncture needles
Abstract
A surface modification method of acupuncture needle set for solving the problem that the patient feels less comfortable by the needle set manufactured by the existing surface processing method of acupuncture needle set, comprising: contacting the acupuncture needle with a nitrogen-containing compound in the presence of a supercritical fluid, wherein the volume ratio of the supercritical fluid to the nitrogen-containing compound is 100: 0.2-100: 4, the contact time of the acupuncture needle tool and the nitrogen-containing compound is 0.5 to 2 hours, the contact temperature is 90 to 150 ℃, and the contact pressure is 100 to 300 atmospheric pressure, so that nitrogen elements in the nitrogen-containing compound are attached to the surface of the acupuncture needle tool.
Description
Technical Field
The present invention relates to a method for modifying the surface of an acupuncture needle, and more particularly, to a method for modifying the surface of an acupuncture needle capable of increasing the feeling of patient's breath during electric acupuncture therapy.
Background
According to the theory of traditional Chinese medicine, acupuncture can stimulate the acupuncture points of the human body and improve the circulation of qi and blood in the meridians of the human body, thereby having a treatment effect on patients. Acupuncture and moxibustion are classified into "needling" and "moxibustion", and for the convenience of the reader, the term "acupuncture" as used herein refers to "needling" therapy. If the patient feels sour, numb, swollen, heavy and the like during the acupuncture process, which is called "qi-getting", the higher the qi-getting feeling during the acupuncture process, the better the acupuncture effect. In order to enhance the patient's feeling of inspiration, electrical needle therapy may be selectively administered; the electric acupuncture therapy is that current is applied to a needle tool after the acupuncture is inserted, so that the current enters a human body through the needle tool, the numbness and swelling feeling which can be felt by a patient in the acupuncture process is increased, and the acupuncture effect is improved.
Because a patient is afraid of the pain feeling during the needle insertion, the surface processing method of the prior acupuncture needle tool is developed; the surface processing method of the prior acupuncture needle tool comprises carving or grinding, and the like, thereby changing the surface structure of the needle tool (for example, the surface of the needle tool is provided with grooves), and reducing the discomfort of a patient during needle insertion. However, the conventional acupuncture needle manufactured by the surface processing method can only reduce pain during needle insertion, and does not significantly contribute to the patient's feeling of inspiration and therapeutic effect when performing electro-acupuncture therapy using the needle.
Accordingly, there is still a need for improvement of the surface processing method of the conventional acupuncture needle device.
Disclosure of Invention
In order to solve the above problems, an object of the present invention is to provide a method for modifying the surface of an acupuncture needle, which can reduce the contact resistance between the acupuncture needle and human tissues during electric acupuncture.
An object of the present invention is to provide a method for modifying the surface of an acupuncture needle, which can reduce unnecessary energy consumption.
An object of the present invention is to provide a surface modification method for an acupuncture needle, which can simplify the modification process.
The surface modification method of the acupuncture needle tool of the present invention may include: contacting the acupuncture needle with a nitrogen-containing compound in the presence of a supercritical fluid, wherein the volume ratio of the supercritical fluid to the nitrogen-containing compound is 100: 0.2-100: 4, the contact time of the acupuncture needle tool and the nitrogen-containing compound is 0.5 to 2 hours, the contact temperature is 90 to 150 ℃, and the contact pressure is 100 to 300 atmospheric pressure, so that nitrogen elements in the nitrogen-containing compound are attached to the surface of the acupuncture needle tool.
Accordingly, the method for modifying the surface of the acupuncture needle tool of the present invention utilizes the good fluidity and solubility of the supercritical fluid to make the nitrogen-containing compound dissolved in the supercritical fluid uniformly contact with the acupuncture needle tool, so that the nitrogen element in the nitrogen-containing compound is attached to the surface of the acupuncture needle tool, thereby reducing the contact resistance between the modified acupuncture needle tool and the human tissue, and also improving the feeling of patients, thereby increasing the treatment effect of the electro-acupuncture therapy.
Wherein the contact time of the acupuncture needle tool and the nitrogen-containing compound is preferably 2 hours, the contact temperature is preferably 120 ℃, and the contact pressure is preferably 200 atm. Thus, the nitrogen content of the acupuncture needle modified at the contact temperature is close to saturation, and the acupuncture needle has the effects of reducing energy consumption, reducing manufacturing cost and the like.
Wherein the supercritical fluid may be supercritical carbon dioxide. Therefore, the needle device has the effects of saving energy and improving the safety of the modified acupuncture needle device in use.
Wherein the nitrogen-containing compound may be ammonia gas. Thus, the nitrogen-containing acupuncture needle has the effect of improving the adhesion rate of nitrogen elements to the acupuncture needle.
Drawings
Fig. 1 is a box diagram of a visual evaluation scale used on Hegu acupoint for an unmodified acupuncture needle set and a modified acupuncture needle set.
Fig. 2 is a box diagram of a visual evaluation scale used for Quchi points of an unmodified acupuncture needle set and a modified acupuncture needle set.
Detailed Description
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below:
the use of the terms a or an for the elements and components described throughout this disclosure are for convenience only and provide a general sense of the scope of the invention; in the present invention, it is to be understood that the singular includes plural unless it is obvious that it is meant otherwise.
An embodiment of the method for modifying the surface of an acupuncture needle of the present invention may include: contacting the acupuncture needle with nitrogen-containing compound in the presence of supercritical fluid to make nitrogen element in the nitrogen-containing compound attach to the surface of the acupuncture needle.
In detail, the acupuncture needle is any needle that can be used for electric acupuncture, such as a stainless steel needle, a gold needle, or a silver needle. In this embodiment, the stainless steel acupuncture needle is directly contacted with the nitrogen-containing compound in the presence of the supercritical fluid, so that the nitrogen element in the nitrogen-containing compound is attached to the surface of the acupuncture needle, thereby obtaining the modified acupuncture needle; for example, but not limited to, the acupuncture needle may be placed in an environment filled with the supercritical fluid and then the nitrogen-containing compound is introduced into the environment, or the nitrogen-containing compound and the supercritical fluid may be mixed into a mixture and then the mixture may be brought into contact with the acupuncture needle.
In this embodiment, the nitrogen-containing compound and the supercritical fluid are mixed to form the mixture, and then the mixture is contacted with the acupuncture needle. The contact time of the acupuncture needle and the nitrogen-containing compound can be 0.5-2 hours, the contact temperature and the contact pressure can be 90-150 ℃ and 100-300 atmospheric pressure respectively, and the volume ratio of the supercritical fluid to the nitrogen-containing compound is 100: 0.2-100: 4; the contact time is counted after the acupuncture needle completely contacts the mixture and the contact temperature and the contact pressure reach certain values. The modified acupuncture needle prepared under the conditions has nitrogen elements attached to the surface, the nitrogen content can reach 0.1-5%, the nitrogen elements on the surface of the modified acupuncture needle can reduce the contact resistance and the initial voltage (1.3-2.5 volts) between the needle and human tissues, and patients can have more obvious feeling of qi (about 3-15) so as to improve the treatment effect of the electric acupuncture therapy.
Since the supercritical fluid has good fluidity and solubility, it is suitable for dissolving the nitrogen-containing compound as a solvent, and can help the nitrogen-containing compound to uniformly contact with the acupuncture needle, so that nitrogen elements in the nitrogen-containing compound are uniformly attached to the surface of the acupuncture needle; in addition, in the modification process, the supercritical fluid can take away impurities on the surface of the acupuncture needle tool without performing an additional cleaning step on the acupuncture needle tool, so that the convenience of the modification process can be improved, and the adhesive force between nitrogen elements and the acupuncture needle tool is enhanced.
The supercritical fluid may be a substance which is easily obtained and brought into a supercritical state, such as supercritical carbon dioxide, supercritical water, or supercritical methanol. The supercritical fluid is preferably supercritical carbon dioxide, and has the characteristic that the supercritical state can be achieved by normal-temperature pressurization due to the fact that the critical temperature of the carbon dioxide is 31 ℃ and the critical pressure is 72.8 atm, and energy required by phase change can be reduced; and the toxicity of the supercritical carbon dioxide is low, so that the use safety of the modified acupuncture needle tool can be improved.
The nitrogen-containing compound may be ammonia (NH)3) Hydrazine (N)2H4) Nitrogen dioxide (NO)2) Nitrogen monoxide (NO) or dinitrogen monoxide, etc. (N)2O) and the like which can react with the metal. In this embodiment, ammonia gas is selected as the nitrogen-containing compound, and the volume ratio of supercritical carbon dioxide to ammonia gas is 100: 1, contacting the acupuncture needle with ammonia gas in the presence of supercritical carbon dioxide; in addition, the ammonia gas has strong reactivity and is easy to attach to the surface of the acupuncture needle tool, so that the attachment rate of nitrogen elements to the acupuncture needle tool can be improved.
In order to understand the influence of the modified acupuncture needle of the present invention on the patient's feeling of inspiration, the following tests were performed:
(A) influence of contact time on nitrogen content of modified acupuncture needle, initial voltage of electric acupuncture and moxibustion, and feeling of qi
This experiment compared the nitrogen content of unmodified acupuncture needles and modified acupuncture needles prepared at different contact times, the starting voltage of electrotherapy, and the sensation of inspiration of the subjects. The modified acupuncture needle tool is prepared under the following conditions: when the volume ratio of the supercritical carbon dioxide to the ammonia gas is 100: 1, the contact temperature of the acupuncture needle tool and ammonia gas is 120 ℃, the contact pressure is 200 atm, the contact time is 0.5, 1 and 2 hours respectively, and the nitrogen content is shown in table 1; in addition, the modified acupuncture needle set and the unmodified acupuncture needle set were used to perform the electrical acupuncture on the Hegu acupoint and the Quchi acupoint of the subject, and the initial voltage between the two acupoints and the feeling of inspiration of the subject were measured while the magnitude of the electrical current of the electrical acupuncture was kept constant, and the results are also shown in Table 1:
TABLE 1 relationship between contact time and nitrogen content, initial voltage and feeling of qi for each modified acupuncture needle set in this experiment
| Contact time (hours) | Nitrogen content (%) | Starting voltage (volt) | Feeling of acquired qi |
| Unmodified | 0 | 2.71 | 5.390 |
| 0.5 | 1.04 | 2.48 | 6.020 |
| 1 | 2.34 | 2.17 | 6.545 |
| 2 | 4.80 | 1.35 | 9.490 |
From the above experiments, it can be known that the longer the contact time between the acupuncture needle and ammonia gas is between 0.5 and 2 hours, the higher the nitrogen content of the obtained modified acupuncture needle and the smaller the starting voltage when performing the electric acupuncture, and it can be inferred from Ohm's law that the smaller the starting voltage is, the smaller the contact resistance between the modified acupuncture needle and the human tissue is. In addition, the patient feels a higher sensation of getting qi when the nitrogen content of the modified acupuncture needle is higher.
(B) Influence of contact temperature on nitrogen content of modified acupuncture needle, initial voltage of electric acupuncture and moxibustion, and feeling of qi
This experiment compared the nitrogen content of unmodified acupuncture needles with the modified acupuncture needles prepared at different contact temperatures, the starting voltage of electrotherapy, and the sensation of inspiration of the subjects. The modified acupuncture needle tool is prepared under the following conditions: when the volume ratio of the supercritical carbon dioxide to the ammonia gas is 100: 1, the contact time of the acupuncture needle tool and ammonia gas is 1 hour, the contact pressure is 200 atm, the contact temperature is 90, 120 and 150 ℃, and the nitrogen content is shown in table 2; in addition, the above-mentioned modified acupuncture needle set and unmodified acupuncture needle set were used to perform the electric acupuncture on the Hegu acupoint and Quchi acupoint of the subject, and the initial voltage between the two acupoints and the feeling of inspiration of the subject were measured while the magnitude of the electric current of the electric acupuncture was kept constant, and the results are also shown in Table 2:
TABLE 2 relationship between contact temperature and nitrogen content, initial voltage and feeling of qi for each modified acupuncture needle set in this experiment
From the above experiments, it was found that, at a contact temperature of 90 to 150 ℃, as the contact temperature of the acupuncture needle set with ammonia gas is higher, the nitrogen content of the modified acupuncture needle set is higher, and the starting voltage for performing the electric acupuncture is lower; in addition, when the modified acupuncture needle has higher nitrogen content, the patient feels more obvious feeling of getting qi when the electric acupuncture therapy is carried out.
It should be noted that, in the modified acupuncture needle set with the contact temperature of 120 ℃ and 150 ℃, the nitrogen content increases only slightly with the increase of the contact temperature, in other words, when the contact temperature is higher than 120 ℃, the nitrogen content of the modified acupuncture needle set tends to be saturated and does not change significantly with the increase of the contact temperature; therefore, when the acupuncture needle contacts the nitrogen-containing compound in the presence of the supercritical fluid, the contact temperature is preferably 120 ℃, and the contact time and the contact pressure are preferably 2 hours and 200 atmospheres, respectively, so as to obtain the modified acupuncture needle with higher nitrogen content, and also reduce energy consumption and manufacturing cost.
(C) Unmodified acupuncture needle and modified acupuncture needle used for analyzing human sensitivity of Hegu acupoint
This experiment compared the human perceptibility of unmodified acupuncture needle and modified acupuncture needle when used in the Hegu acupoint, wherein the modified acupuncture needle was prepared under the conditions that the volume ratio of supercritical carbon dioxide to ammonia gas was 100: 1, and the contact time, the contact temperature and the contact pressure of the acupuncture needle tool and ammonia gas are respectively 2 hours, 120 ℃ and 200 atmospheres. When the examinee performed electric acupuncture on the unmodified acupuncture needle and the modified acupuncture needle, respectively, visual assessment scales (VAS score) were filled in the feelings of soreness, numbness, distension, and weight, etc. felt by the Hegu acupoint, thereby comparing the difference in the feeling of touch when different needles were used in the Hegu acupoint, and the results are shown in table 3:
TABLE 3 visual evaluation scale values of unmodified acupuncture needle and modified acupuncture needle used in Hegu acupoint
Referring to table 3 and fig. 1, the data of group a and b in fig. 1 are box-shaped views of the visual assessment scale for different feelings felt by the subjects at the point of the Hegu when performing the electric acupuncture therapy using the unmodified acupuncture needle set and the modified acupuncture needle set, respectively; the thick lines in fig. 1 and the values in table 3 are the average values of the visual evaluation results for each sensation. As can be seen from table 3, the use of the modified acupuncture needle can improve the average sensation of soreness, numbness, distension and heaviness of the subjects on the Hegu acupoint, thereby improving the sensation of qi of the subjects; as can be seen from fig. 1, the modified acupuncture needle significantly enhances the feeling of acidity and weight of the Hegu acupoint, thereby achieving the effect of increasing the feeling of qi.
(D) Unmodified acupuncture needle and modified acupuncture needle used for analyzing human sensitivity of Quchi point
This experiment compared the human perceptibility of unmodified acupuncture needle and modified acupuncture needle when used in the quchi acupoint, wherein the modified acupuncture needle was prepared under the conditions that the volume ratio of supercritical carbon dioxide to ammonia gas was 100: 1, and the contact time, the contact temperature and the contact pressure of the acupuncture needle tool and ammonia gas are respectively 2 hours, 120 ℃ and 200 atmospheres. When the examinee performed electric acupuncture therapy on the unmodified acupuncture needle and the modified acupuncture needle, respectively, visual assessment scales were filled in the sensations of soreness, numbness, distension and weight, etc. felt in the quchi acupuncture point, so as to compare the differences in the sensations of qi obtained when different acupuncture needles were used in the quchi acupuncture point, and the results are shown in table 4:
TABLE 4 visual evaluation scale values of unmodified acupuncture needle and modified acupuncture needle used in Quchi acupuncture point
| Feeling of | Unmodified acupuncture needle | Modified acupuncture needle |
| Feeling of acquired qi | 3.185 | 3.710 |
| Acid(s) | 4.935 | 5.845 |
| Hemp (flax) | 2.660 | 3.045 |
| Expand | 2.625 | 3.290 |
| Heavy load | 2.240 | 2.870 |
Referring to table 4 and fig. 2, the data of the a-th and b-th groups in fig. 2 are box charts of visual assessment scales of different feelings felt by the subjects in the quchi point when performing electric acupuncture using the unmodified acupuncture needle and the modified acupuncture needle, respectively; the thick lines in fig. 2 and the values in table 4 are the average values of the visual evaluation results for each sensation. As can be seen from table 4, the use of the modified acupuncture needle can improve the average sensation of soreness, numbness, distension and heaviness of the subjects on the quchi acupuncture point, and further improve the sensation of qi of the subjects; as can be seen from fig. 2, the modified acupuncture needle significantly enhances the sensation of soreness, numbness, heaviness, etc. of the quchi acupuncture point, thereby achieving the effect of increasing the sensation of qi.
In summary, the method for modifying the surface of an acupuncture needle according to the present invention utilizes the good fluidity and solubility of the supercritical fluid to make the nitrogen-containing compound dissolved in the supercritical fluid uniformly contact with the acupuncture needle, so that the nitrogen element in the nitrogen-containing compound is attached to the surface of the acupuncture needle, thereby reducing the contact resistance between the modified acupuncture needle and the human tissue, and improving the feeling of qi of the patient, thereby increasing the therapeutic effect of the electro-acupuncture.
Claims (3)
1. A surface modification method of an acupuncture needle tool is characterized by comprising the following steps:
contacting the acupuncture needle with a nitrogen-containing compound in the presence of a supercritical fluid, wherein the volume ratio of the supercritical fluid to the nitrogen-containing compound is 100: 0.2-100: 4, the contact time of the acupuncture needle tool and the nitrogen-containing compound is 2 hours, the contact temperature is 120 ℃, and the contact pressure is 200 atm, so that nitrogen elements in the nitrogen-containing compound are attached to the surface of the acupuncture needle tool.
2. The method of claim 1, wherein the supercritical fluid is supercritical carbon dioxide.
3. The method of claim 1, wherein the nitrogen-containing compound is ammonia gas.
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