A hollow needle knife and its application method

Abstract

The present invention discloses a hollow needle knife and its application method, belonging to the field of medical devices. A hollow needle knife of the present invention comprises a needle knife handle, a hollow needle blade, a soft sleeve and a positioning and fixing mechanism; wherein: the hollow needle blade is fixedly connected to the front end surface of the needle knife handle; the positioning and fixing mechanism positions the soft sleeve on the hollow needle blade, making full use of the cutting ability of the needle knife, and then adjusting the position and positioning relationship between the soft sleeve and the needle knife through the positioning and fixing mechanism. During the sweeping action, the soft sleeve shields and protects the blade edge while being buried in the lesion, thereby ensuring that the soft tissue will not be damaged during the sweeping and stripping treatment. After the stripping and sweeping treatment, the soft sleeve is conveniently left in the patient's lesion to separate the adhesions, so as to achieve a fast and accurate medical effect. It solves the problems in the prior art that the needle tip only has the piercing function and the sweeping action has poor cutting ability. Moreover, the hollow needle blade has the function of accurately feeding medicine.

Description

Technical Field

[0001] The invention relates to the field of medical instruments, and more particularly to a hollow needle knife and an application method thereof. Background Art

[0002] There are two types of needle medical devices currently used clinically, one is a solid needle and the other is a hollow needle. The existing hollow needle tip only has the function of piercing. When encountering relatively tough tissue in the human lesion, it does not have the ability to cut, and it is difficult to perform sweeping and dispersing medical treatment. It can only be forcibly pried by needle tubes or other hard objects, which is easy to accidentally injure other soft tissues of the patient or cause pain to the patient. Although the "ordinary small needle knife" has the ability to pierce and cut, the blade is sharp and has no shielding and protection function. It is difficult to avoid other soft tissues from being injured during the peeling and sweeping process.

[0003] The existing needle knife treatment method is to use the needle knife to enter the superficial fascia layer to loosen the subcutaneous connective tissue, but some adhesions cannot be effectively separated, and the treatment is not thorough enough; the adhesions are swept and loosened at the lesion using the needle tip or hard metal head. When encountering relatively tough tissue in the lesion, the needle tip or hard metal head does not have the ability to cut and peel, and it is difficult to perform sweeping, peeling and loosening medical treatment. It can only be forcibly pried by steel wire or hard metal head. At the same time, the needle tip or hard metal head is always exposed to the outside, which is easy to accidentally injure other soft tissues of the patient or cause pain to the patient. Summary of the invention

[0004] 1. Technical problem to be solved by the invention

[0005] In view of the problems that ordinary needle knives or other acupuncture therapies in the prior art are not capable of cutting, slicing and leaving a tube to isolate adhesion tissues during sweeping and dispersion, the present invention provides a "hollow needle knife and its application method", which fully utilizes the cutting ability of the needle knife, and then adjusts the position and positioning relationship between the soft cannula and the needle knife through a positioning and fixing mechanism. After sweeping and dispersion treatment, the soft cannula can be accurately left at the lesion to effectively isolate the swept and peeled lesion adhesions, while retaining the anti-inflammatory injection channel to avoid the pain of repeated medical treatment for patients.

[0006] 2. Technical solution

[0007] In order to achieve the above object, the technical solution provided by the present invention is:

[0008] A hollow needle knife comprises a needle knife handle, a hollow needle blade, a soft sleeve and a positioning and fixing mechanism; wherein: the hollow needle blade is fixedly connected to the front end surface of the needle knife handle; the positioning and fixing mechanism positions the soft sleeve on the hollow needle blade, making full use of the cutting ability of the needle knife, and then adjusting the position and positioning relationship between the soft sleeve and the needle knife through the positioning and fixing mechanism. During the sweeping action, the soft sleeve shields and protects the blade edge while being buried in the lesion, thereby ensuring that the soft tissue will not be damaged during the sweeping and stripping treatment. After the stripping and sweeping treatment, it is convenient to leave the soft sleeve in the patient's lesion to separate the adhesions, so as to achieve a fast and accurate medical effect. Moreover, the special structure of the hollow needle blade has the function of accurate drug feeding.

[0009] A further technical solution is that the needle knife handle is a double-layer structure, which is an upper slide and a lower slide connected by a rail groove structure; the positioning and fixing mechanism is a plate-like structure with an "L"-shaped cross section, a positioning half-slot hole is provided on the front end surface, and a positioning protrusion is provided on the bottom surface near the rear end surface; the tail of the soft cannula is provided with a cannula fixing sleeve with a "stem"-shaped cross section, and the end of the cannula fixing sleeve is provided with two cannula positioning platforms, and a cannula positioning groove is formed between the two cannula positioning platforms; the positioning half-slot hole is arranged in the cannula positioning groove; the upper surface of the upper slide near the front end surface is provided with a positioning blind hole arranged in cooperation with the positioning protrusion. The hollow needle blade is positioned in a coordinated manner by three pairs of components, namely, the positioning half-slot hole and the cannula positioning groove, the positioning protrusion and the positioning blind hole, and the upper slide and the lower slide. The positioning is accurate and stable. During the sweeping action, the soft cannula is accurately and stably swept and buried in the lesion, thereby achieving a fast and accurate medical effect.

[0010] A further technical solution is that the positioning and fixing mechanism is a plate-like structure with a "U"-shaped cross section, and a positioning half-slot hole is provided on the front end surface, and the two pivot rods of the "U"-shaped plate-like structure are pivotally connected to the two side walls of the needle knife handle respectively; the tail of the soft cannula is provided with a cannula fixing sleeve with a "stem"-shaped cross section, and the end of the cannula fixing sleeve is provided with two cannula clamping platforms, and a cannula clamping groove is formed between the two cannula clamping platforms; the positioning half-slot hole is clamped in the cannula clamping groove, and the two are arranged in coordination. Through the coordinated clamping of the positioning half-slot hole and the cannula clamping groove and the pivotal relationship between the two pivot rods and the needle knife handle, the clamping is accurate and stable, and during the sweeping action, the technical effect of accurately and stably sweeping and burying the soft cannula in the lesion is achieved, thereby achieving a fast and accurate medical effect, and the specifications of the positioning and fixing mechanism can be selected accordingly according to the size of the lesion.

[0011] A method for applying a hollow needle knife, comprising the following steps:

[0012] Step 1, inserting the needle knife: When the positioning half-slot hole is stuck in the sleeve clamping slot, and the clamping protrusion is stuck in the clamping blind hole, the hollow blade of the hollow needle blade body extends out of the soft sleeve, and the hollow blade is inserted into the needle to the set insertion point on the skin; when inserting the needle, the local skin should be moderately tight, and the hollow needle blade can be ejected with the needle inserter;

[0013] Step 2, needle knife operation: This is the operation process from the time the needle enters the superficial fascia layer to the completion of deep puncture. The hollow blade can be pushed forward horizontally along the superficial fascia layer to the set needle operation depth with the right hand alone; when pushing forward, lift it slightly to prevent the hollow blade from going deep. When moving the needle, the skin can be seen to bulge. During the whole needle operation process, the right hand feels soft and easy to move, and the patient does not feel soreness, swelling, numbness, etc., otherwise the deep puncture is too deep or too shallow.

[0014] Step 3, sweeping action: push the soft cannula forward by sliding the upper slide forward, stagger the upper slide and the lower slide, retract the hollow blade into the soft cannula, press the positioning and fixing mechanism, and let the front end of the soft cannula perform a sweeping action. Use the thumb or index finger and middle finger of the right hand as a fulcrum, hold the needle knife handle, press the positioning and fixing mechanism, and let the front end of the soft cannula perform a sweeping action.

[0015] Step 4: Leave the tube: After the sweeping action, remove the positioning and fixing mechanism, withdraw the hollow needle blade, and fix the soft cannula and leave it at the lesion. The purpose of leaving the tube is to maintain the pain effect.

[0016] Another method of using the hollow needle knife is as follows:

[0017] Step 1: Insert the needle knife: After the hollow blade of the hollow needle blade extends out of the soft cannula, insert the hollow blade into the superficial fascia layer to the set insertion point;

[0018] Step 2: Needle knife: Push the hollow blade forward horizontally along the superficial fascia layer to the set needle depth;

[0019] Step 3: Sweeping action: Move the needle knife handle back and the hollow blade back into the soft sleeve until the positioning half-slot hole is stuck in the sleeve clamping slot, press the positioning fixing mechanism, and let the front end of the soft sleeve perform a sweeping action;

[0020] Step 4: Leaving the tube: After the sweeping action, remove the positioning and fixing mechanism, withdraw the hollow needle blade, and fix the soft cannula and leave it at the lesion.

[0021] In a further application method, the hollow needle blade penetrates the front and rear end surfaces of the needle handle, and step two also includes the action of feeding medicine through the hollow needle blade.

[0022] 3. Beneficial effects

[0023] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0024] (1) A hollow needle knife and its application method of the present invention, the hollow blade of the "hollow needle knife" is sharp, has the ability to pierce and cut, and also has the function of feeding medicine. At the same time, a soft sleeve is installed on the knife body. When sweeping and dispersing, the soft sleeve is pushed out and fixed at a position higher than the hollow blade. The hollow blade is shielded and protected by the soft sleeve, ensuring that the patient's soft tissue will not be damaged when the doctor performs sweeping and dispersing treatment on the patient. After the dispersing and sweeping treatment, the soft sleeve is conveniently left in the patient's lesion to separate the adhesion, thereby achieving a rapid and accurate medical effect;

[0025] (2) A hollow needle knife and its application method of the present invention, through positioning and fixing mechanisms of different structures, the soft sleeve on the hollow needle knife can be retracted and loaded and unloaded freely outside or inside the needle body, and can be accurately positioned and fixed;

[0026] (3) A hollow needle knife and its application method of the present invention. When the hollow needle knife is used for sweeping, the hollow blade of the hollow needle knife, whether it is pointed, rounded, or flat, is protected by a medical soft cannula. The soft cannula has the function of accurately shielding and protecting the blade, so that the blade will not accidentally injure other tissues of the patient.

[0027] (4) A hollow needle knife and its application method of the present invention, the soft sleeve of the "hollow needle knife" is made of a material that can be absorbed by the skin, and there is no need for a subsequent tube removal step.

[0028] (5) A hollow needle knife and its application method of the present invention have a special structure of a hollow needle body, and the soft sleeve can be in two forms: sleeved on the outside of the hollow needle knife body and placed inside the needle body; when placed inside the needle body, it not only has the function of storing the soft sleeve, but also has the function of accurately feeding medicine. Moreover, since the soft sleeve can be infinitely extended, theoretically, a soft sleeve of any length can be buried in the lesion;

[0029] (6) The hollow needle knife and its application method of the present invention have a wide range of indications, such as chronic headache, spondylosis, frozen shoulder, tennis elbow, tenosynovitis, carpal tunnel syndrome, lumbar disc herniation, lumbar muscle strain, knee arthritis, old bare joint injury, femoral head necrosis, ankylosing spondylitis, cholecystitis and cholelithiasis, chronic stomach pain, urinary tract stones, chronic adnexitis, cervicitis, dysmenorrhea, intractable facial paralysis, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the structure of the hollow needle knife during needle insertion and needle movement according to Example 1 of the present invention;

[0031] Figure 2 This is a schematic diagram of the hollow needle knife during the sweeping action of Example 1 of the present invention;

[0032] Figure 3This is a schematic diagram of the structure of the hollow needle knife after disassembly of Example 1 of the present invention;

[0033] Figure 4 This is a schematic diagram of the structure of the hollow needle knife during needle insertion and needle movement according to Example 2 of the present invention;

[0034] Figure 5 This is a schematic diagram of the hollow needle knife during the sweeping action of Example 2 of the present invention;

[0035] Figure 6 This is a schematic diagram of the hollow needle knife in Example 2 of the present invention after being disassembled;

[0036] Figure 7 This is a schematic diagram of the structure of the hollow needle knife according to Example 4 of the present invention;

[0037] Figure 8 This is a schematic diagram of the structure after the hollow blade is enlarged.

[0038] In the figure: 1-needle handle; 2-hollow needle blade; 3-soft sleeve; 4-positioning and fixing mechanism; 11-upper slide; 12-lower slide; 21-hollow blade; 31-sleeve fixing sleeve; 41-positioning half slot hole; 44-positioning protrusion; 45-pivot rod; 111-positioning blind hole; 121-slide; 311-sleeve positioning platform; 312-sleeve positioning slot. DETAILED DESCRIPTION

[0039] In order to further understand the content of the present invention, the invention is described in detail with reference to the accompanying drawings.

[0040] Example 1

[0041] A hollow needle knife of the present embodiment, such as Figures 1 to 3 As shown, the needle knife handle 1 includes a needle knife handle 1, a hollow needle blade 2, a soft sleeve 3 and a positioning and fixing mechanism 4; wherein: the hollow needle blade 2 is fixedly connected to the front end surface of the needle knife handle 1; the positioning and fixing mechanism 4 positions the soft sleeve 3 on the hollow needle blade 2. In this embodiment, the needle knife handle 1 has a double-layer structure, which includes an upper slide plate 11 and a lower slide plate 12 that are slidably connected by a track groove structure. The track groove structure can be as follows Figure 2The slide groove 121 on the lower slide plate 12 shown is arranged in cooperation with the slide rail on the bottom surface of the upper slide plate 11; the positioning and fixing mechanism 4 is a plate-like structure with an "L"-shaped cross section, a positioning half-slot hole 41 is arranged on the front end surface, and a locking protrusion 44 is arranged on the bottom surface close to the rear end surface; the tail of the soft sleeve 3 is provided with a sleeve fixing sleeve 31 with a "stem"-shaped cross section, and the end of the sleeve fixing sleeve 31 is provided with two sleeve locking platforms 311, and a sleeve locking groove 312 is formed between the two sleeve locking platforms 311; the positioning half-slot hole 41 is clamped in the sleeve locking groove 312 and arranged in cooperation; the upper surface of the upper slide plate 11 close to the front end surface is provided with a locking blind hole 111 arranged in cooperation with the locking protrusion 44. Figure 8 As shown, the hollow blade 21 at the top of the hollow needle blade body 2 can be a single-sided blade, and the hollow blade is sharp and has the ability to pierce and cut.

[0042] Before treatment, it is necessary to determine the entry point. The choice of entry point is related to the success and quality of medical treatment. In the process of selecting the entry point, the following five principles should be clarified:

[0043] 1. Small-scale pain should be approached, while large-scale pain with multiple pain points should be kept away;

[0044] 2 In most cases, the painful area or the upper, lower, left or right side is selected for easy operation and catheter retention. However, near the joint or between the ribs, there is no need to stick to the upper, lower, left or right side, and the entry point can be selected obliquely.

[0045] 3Avoid scars, nodules, damage, depressions, protrusions, etc. on the skin;

[0046] 4. There should be no elbow tip, patella, radial styloid process, ulnar head, inner nakedness, outer nakedness, etc. between the entry point and the painful area.

[0047] The application method of the hollow needle knife in this embodiment comprises the following specific steps:

[0048] Step 1: Insert the needle knife: Figure 1 As shown, when the positioning half-slot hole 41 is stuck in the sleeve clamping groove 312, and the clamping protrusion 44 is stuck in the clamping blind hole 12, the hollow blade 21 of the hollow needle blade body 2 extends out of the soft sleeve 3, and the hollow blade 21 enters the set position at the superficial fascia; when inserting the needle knife, the local skin should be appropriately loose and tight, and the hollow needle blade body 2 can be ejected with a needle inserter;

[0049] Step 2, needle knife operation: This is the operation process from the time the needle is inserted into the superficial fascia to the completion of deep puncture. The hollow blade 21 can be pushed forward horizontally along the superficial fascia layer to the set needle operation depth with the right hand alone; when pushing forward, lift it slightly to prevent the hollow blade 21 from going deep. When the needle is moved, the skin can be seen to be bulging. During the whole needle movement process, the right hand feels soft and easy to move, and the patient does not feel soreness, swelling, numbness, etc., otherwise the deep puncture is too deep or too shallow.

[0050] Step 3: Sweeping action: Figure 2 As shown, the upper slide plate 11 is slid forward to push the soft sleeve 3 forward, the upper slide plate 11 and the lower slide plate 12 are staggered, and the hollow blade 21 is retracted into the soft sleeve 3. The right thumb or index finger and middle finger are used as fulcrums, and the needle knife handle 1 is held by hand, and the positioning and fixing mechanism 4 is pressed to make the front end of the soft sleeve 3 perform a sweeping action; when sweeping, the right thumb or index finger and middle finger are pressed against the patient's skin, so that the needle knife handle 1 is slightly away from the skin, and the doctor slightly lifts the hollow needle knife so that the soft sleeve 3 buried under the skin slightly bulges the skin. The operation should be gentle and rhythmic, and the operation time and number of times depend on the condition of the pain. In other words, if the pain has disappeared or is no longer relieved, stop doing this action. The other hand must cooperate closely to relax the range between the entry point and the pain point. If the pain still exists after sweeping, you can choose an entry point closer to the pain point and re-enter.

[0051] Step 4, leaving the tube: After the sweeping action continues for a set time, remove the positioning and fixing mechanism 4, withdraw the hollow needle blade 2, and fix the soft cannula 3 and leave it at the lesion. You can use adhesive tape to fix the cannula fixing sleeve 31. The purpose of leaving the tube is to effectively isolate the adhesion part and ensure the medical effect.

[0052] Step 5, tube removal: After the tube is in place for a predetermined time, the tube is removed and the soft cannula 3 is taken out. During treatment, the patient should be advised not to wet the puncture site during the tube in place to prevent infection; do not exercise vigorously; do not be nervous if there is any abnormal sensation locally, which is mostly caused by allergies to the adhesive tape used to fix the cannula 31. The doctor can fix it with other types of objects, such as Band-Aid hemostatic patches, etc.; if the soft tube moves and causes local tingling, and there is no doctor nearby, the patient can remove the tube by himself.

[0053] The hollow needle knife and its application method of this embodiment are used to coordinate and position the hollow needle blade 2 through three pairs of components: positioning the half-slot hole 41 and the sleeve clamping slot 312, the clamping protrusion 44 and the clamping blind hole 111, and the upper slide plate 11 and the lower slide plate 12. The hollow blade of the "hollow needle knife" is sharp and has the ability to pierce and cut. At the same time, a soft sleeve 3 is installed on the knife body. When sweeping, the soft sleeve 2 is pushed out and fixed at a position higher than the hollow blade 21. The hollow blade 21 is shielded and protected by the soft sleeve 3, ensuring that the patient's soft tissue will not be harmed when the doctor sweeps and peels the patient. After the peeling and sweeping treatment, it is convenient to leave the soft sleeve in the patient's lesion to separate the adhesions, so as to achieve a fast and accurate medical effect.

[0054] The hollow needle knife and its application method of the present embodiment have a wide range of indications, such as chronic headache, spondylosis, frozen shoulder, tennis elbow, tenosynovitis, carpal tunnel syndrome, lumbar disc herniation, lumbar muscle strain, knee arthritis, old bare joint injury, femoral head necrosis, ankylosing spondylitis, cholecystitis and cholelithiasis, chronic stomach pain, urinary tract stones, chronic adnexitis, cervicitis, dysmenorrhea, intractable facial paralysis, etc.

[0055] Example 2

[0056] The hollow needle knife and its application method of this embodiment have the same basic structure as that of embodiment 1, and the differences and improvements are as follows: Figure 4-6 As shown, the positioning and fixing mechanism 4 is a plate-like structure with a "U"-shaped cross-section, and a positioning half-slot hole 41 is provided on the front end surface. The two pivot rods 45 of the "U"-shaped plate-like structure are pivoted to the two side walls of the needle knife handle 1, that is, a pivot axis or a pivot hole is provided on the pivot rod 45 or the two side walls of the knife handle 1. If a pivot axis is provided on the inner side of the pivot rod 45, a pivot hole is provided on the corresponding side wall of the knife handle 1, and vice versa. The pivot connection here can also be called hinged; the tail of the soft sleeve 3 is provided with a sleeve fixing sleeve 31 with a "stem"-shaped cross-section, and the end of the sleeve fixing sleeve 31 is provided with two sleeve clamping platforms 311, and a sleeve clamping groove 312 is formed between the two sleeve clamping platforms 311; the positioning half-slot hole 41 is clamped in the sleeve clamping groove 312, and the two are provided in coordination.

[0057] The application method of the hollow needle knife in this embodiment has the same basic steps as in Embodiment 1, and the main difference is step 3, which is specifically:

[0058] Step 1: Insert the needle knife: Figure 4 As shown, the hollow blade 21 of the hollow needle blade body 2 extends out of the soft sleeve 3, and the hollow blade 21 is inserted into the needle to the set insertion point at the superficial fascia layer;

[0059] Step 2, needle knife: push the hollow blade 21 forward along the subcutaneous tissue to the set needle operation depth; in this step, the special structure of the hollow needle blade 2 can be used to feed medicine, such as injecting anti-inflammatory drugs or other appropriate drugs.

[0060] Step 3: Sweeping action: Figure 5 As shown: the needle knife handle 1 is retracted, and the hollow blade 21 is retracted into the soft sleeve 3 until the positioning half-slot hole 41 is stuck in the sleeve clamping groove 312, and the positioning and fixing mechanism 4 is pressed to allow the front end of the soft sleeve 3 to perform a sweeping action; the positioning and fixing mechanism 4 can make the soft sleeve on the hollow needle knife be able to be retracted and loaded and unloaded freely outside or inside the needle body, and can be accurately positioned and fixed.

[0061] Step 4: leaving the tube: After the sweeping action continues for a set time, remove the positioning and fixing mechanism 4, withdraw the hollow needle blade 2, and fix the soft cannula 3 and leave it at the lesion.

[0062] Step 5, tube removal: After the tube is in place for a predetermined time, the tube is removed and the soft cannula 3 is taken out. During treatment, the patient should be advised not to wet the puncture site during the tube in place to prevent infection; do not exercise vigorously; do not be nervous if there is any abnormal sensation locally, which is mostly caused by allergies to the adhesive tape used to fix the cannula 31. The doctor can fix it with other types of objects, such as Band-Aid hemostatic patches, etc.; if the soft tube moves and causes local tingling, and there is no doctor nearby, the patient can remove the tube by himself.

[0063] A hollow needle knife and its application method of this embodiment, through the coordinated positioning of the positioning half-slot hole and the sleeve positioning slot and the pivotal relationship between the two pivot rods 45 and the needle knife handle 1, the positioning is accurate and stable. During the sweeping action, the soft sleeve 3 is accurately and stably swept and buried in the lesion, thereby achieving a fast and accurate medical effect. And through the positioning and fixing mechanisms of different structures, the soft sleeve on the hollow needle knife can be retracted and loaded and unloaded freely outside or inside the needle body, and can be accurately positioned and fixed. The hollow blade 21 of the hollow needle knife, whether it is pointed, round, flat, etc., is protected by a medical soft sleeve. The soft sleeve has the function of accurately shielding and protecting the blade, so that the blade will not accidentally injure other tissues of the patient, and can ensure that the hollow blade is not damaged, thereby increasing its service life.

[0064] The hollow needle knife and its application method of this embodiment have a wide range of indications and applications, see Example 1 for details.

[0065] Example 3

[0066] The hollow needle knife and its application method of this embodiment have the same basic structure as that of embodiment 1 or 2, except that the soft sleeve 3 is made of a material that can be absorbed by the skin.

[0067] Example 4

[0068] A hollow needle knife of the present embodiment, such as Figure 7 As shown, it includes a needle handle 1, a hollow needle blade 2 and a soft sleeve 3; wherein: the hollow needle blade 2 penetrates the needle handle 1; the soft sleeve 3 passes through the hollow of the hollow needle blade 2 and passes through the entire hollow needle blade 2, and the hollow needle blade 2 is placed inside the needle body of the hollow needle blade 2, which not only has the function of storing the soft sleeve, but also has the function of accurately feeding medicine.

[0069] The application method of the hollow needle knife of this embodiment comprises the following steps:

[0070] Step 1: Insert the needle knife: insert the hollow blade 21 of the hollow needle blade body 2 into the set needle insertion point at the superficial fascia layer;

[0071] Step 2, needle knife: push the hollow blade 21 forward horizontally along the superficial fascia layer to a set needle operation depth;

[0072] Step 3: Sweeping action: Push the soft cannula 3 forward from the rear end of the hollow needle blade 2 until the soft cannula 3 passes through the hollow blade 21, press the needle handle 1, and let the front end of the soft cannula 3 perform a sweeping action;

[0073] Step 4: leaving the tube: after the sweeping action, cut off the soft cannula 3, take away the hollow needle blade 2, and only fix the remaining soft cannula 3 and leave it at the lesion;

[0074] Step 5, removing the tube: After leaving the tube for a period of time, remove the tube and take out the soft sleeve 3.

[0075] The hollow needle knife and its application method of this embodiment, since the soft sleeve 3 can be extended indefinitely, theoretically a soft sleeve 3 of any length can be buried in the lesion, and the soft sleeve 3 can also be used to accurately feed medicine in step 2, such as anti-inflammatory drugs or other appropriate drugs.

[0076] The present invention and its embodiments are described schematically above, and the description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and designs a structural method and an embodiment similar to the technical solution without creativity without departing from the purpose of the invention, they shall all fall within the protection scope of the present invention.

Claims

1. A hollow needle knife, characterized in that: The needle knife comprises a needle handle (1), a hollow needle blade (2), a soft sleeve (3) and a positioning and fixing mechanism (4); wherein: the hollow needle blade (2) is fixedly connected to the front end surface of the needle knife handle (1); and the positioning and fixing mechanism (4) sleeves the soft sleeve (3) onto the hollow needle blade (2) in a positioning manner; The needle knife handle (1) has a double-layer structure, comprising an upper slide plate (11) and a lower slide plate (12) which are slidably connected via a track groove structure. The rail groove structure comprises a slide groove (121) on the lower slide plate (12) and a slide rail on the bottom surface of the upper slide plate (11), and the slide groove (121) and the slide rail are arranged in coordination; The positioning and fixing mechanism (4) is a plate-like structure with an "L"-shaped cross section, a positioning half-slot hole (41) is provided on the front end surface, and a locking protrusion (44) is provided on the bottom surface close to the rear end surface; a sleeve fixing sleeve (31) with a "stem"-shaped cross section is provided at the tail of the soft sleeve (3), and two sleeve locking platforms (311) are provided at the end of the sleeve fixing sleeve (31), and a sleeve locking groove (312) is formed between the two sleeve locking platforms (311); the positioning half-slot hole (41) is locked in the sleeve locking groove (312) for matching; and a locking blind hole (111) is provided on the upper surface of the upper slide plate (11) close to the front end surface, which is matched with the locking protrusion (44).

2. The hollow needle knife according to claim 1, characterized in that: The hollow blade (21) at the top of the hollow needle blade (2) is a single-sided blade.

3. The hollow needle knife according to claim 1, characterized in that: The soft sleeve (3) is made of a material that can be absorbed by the skin.

4. A method for using the hollow needle knife according to any one of claims 1 to 3, characterized in that: The steps are: Step 1, inserting the needle knife: when the positioning half-slot hole (41) is stuck in the sleeve locking slot (312), and the locking protrusion (44) is stuck in the locking blind hole (12), the hollow blade (21) of the hollow needle blade body (2) extends out of the soft sleeve (3), and the hollow blade (21) is inserted into the needle to the set needle insertion point on the skin; Step 2: Needle knife: Push the hollow blade (21) forward along the superficial fascia layer to a set needle depth; Step 3: sweeping and dispersing action: the upper slide plate (11) is slid forward to push the soft sleeve (3) forward, the upper slide plate (11) and the lower slide plate (12) are staggered, the hollow blade (21) is retracted into the soft sleeve (3), and the positioning and fixing mechanism (4) is pressed to make the front end of the soft sleeve (3) perform a sweeping and dispersing action; Step 4: leaving the tube: After the sweeping action, remove the positioning and fixing mechanism (4), withdraw the hollow needle blade (2), and fix the soft cannula (3) and leave it at the lesion.

5. The method for using the hollow needle knife according to claim 4, characterized in that: The hollow needle blade (2) penetrates the front and rear end surfaces of the needle blade handle (1), and step 2 also includes the action of feeding medicine through the hollow needle blade (2).

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