CN118000860B - Ultrasound-enhanced nerve block needle - Google Patents
Ultrasound-enhanced nerve block needle Download PDFInfo
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- CN118000860B CN118000860B CN202410329181.6A CN202410329181A CN118000860B CN 118000860 B CN118000860 B CN 118000860B CN 202410329181 A CN202410329181 A CN 202410329181A CN 118000860 B CN118000860 B CN 118000860B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/34—Trocars; Puncturing needles
- A61B17/3401—Puncturing needles for the peridural or subarachnoid space or the plexus, e.g. for anaesthesia
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/34—Trocars; Puncturing needles
- A61B17/3403—Needle locating or guiding means
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/34—Trocars; Puncturing needles
- A61B17/3494—Trocars; Puncturing needles with safety means for protection against accidental cutting or pricking, e.g. limiting insertion depth, pressure sensors
- A61B17/3496—Protecting sleeves or inner probes; Retractable tips
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/70—Cleaning devices specially adapted for surgical instruments
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/34—Trocars; Puncturing needles
- A61B17/3403—Needle locating or guiding means
- A61B2017/3413—Needle locating or guiding means guided by ultrasound
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Abstract
The application provides an ultrasonic enhanced nerve block needle which comprises an inner needle cap, an outer needle cap, an inner needle core and an outer needle tube. Wherein, a through hole is arranged in the outer needle tube; the outer needle cap is connected with the outer needle tube, a communication cavity is arranged in the outer needle cap, and the communication cavity is connected with a through hole of the outer needle tube; the inner needle core passes through the communication cavity and is inserted into the through hole of the outer needle tube; the inner needle cap is connected with one end of the inner needle core, the inner needle cap can be buckled on the outer needle cap, and when the inner needle cap is buckled with the outer needle cap, the other end of the inner needle core extends out of the outer needle tube. According to the ultrasonic enhanced nerve blocking needle, the inner needle core is arranged in the outer needle tube, and in the process that the outer needle tube penetrates into the skin to reach the nerve tissue position, the inner needle core can seal the through hole of the outer needle tube, so that the outer needle tube is prevented from being blocked in the process, the reliability and the operation convenience of the blocking needle are improved, and when the blocking needle enters an injection position, the inner needle core is pulled out, so that the smoothness of the through hole in the outer needle tube can be ensured, and the medicine injection is facilitated.
Description
Technical Field
The invention relates to the field of medical injection instruments, in particular to an ultrasonic enhanced nerve blocking needle.
Background
Nerve block is a commonly used anesthetic technique, and the nerve conduction is temporarily interrupted by injecting local anesthetics around the nerve, so as to achieve the purpose of blocking pain signals. Nerve block can be divided into central nerve block and peripheral nerve block, wherein the peripheral nerve block has the advantages of simple operation, less complications, good analgesic effect and the like, and is widely applied to various operations and pain treatment.
When the nerve block is carried out, the nerve block needle is required to be penetrated into the skin to reach the nerve tissue position, in the process, the needle hole of the nerve block needle is easily blocked by human tissues, so that the medicine cannot be injected into the nerve tissue region through the nerve block needle, and the nerve block cannot be normally carried out.
Disclosure of Invention
The invention aims to provide an ultrasonic enhanced nerve blocking needle, which is used for solving the technical problem that the nerve blocking needle is easy to be blocked by human tissues when the traditional nerve blocking needle is penetrated into the skin to reach the nerve tissue position.
In order to achieve the above purpose, the invention adopts the following technical scheme: an ultrasonically enhanced nerve block needle is provided, the ultrasonically enhanced nerve block needle comprising:
the outer needle tube is internally provided with a through hole;
The outer needle cap is connected with the outer needle tube, a communication cavity is arranged in the outer needle cap, and the communication cavity is connected with a through hole of the outer needle tube;
the inner needle core penetrates through the communication cavity and is inserted into the through hole of the outer needle tube;
The inner needle cap is connected with one end of the inner needle core, the inner needle cap can be buckled on the outer needle cap, and when the inner needle cap is buckled with the outer needle cap, the other end of the inner needle core extends out of the outer needle tube.
In one embodiment, the end of the inner needle core and the end of the outer needle tube are inclined planes, and an included angle between the inclined plane of the inner needle core and the central axis of the inner needle core is smaller than an included angle between the inclined plane of the outer needle tube and the axis of the outer needle tube.
In one embodiment, one end of the outer needle cap, which is close to the inner needle cap, is provided with a positioning connection part, and the positioning connection part comprises a cylinder and a flash block arranged at the tail end of the cylinder; when the inner needle cap is buckled with the outer needle cap, the flash block abuts against the inner wall of the inner needle cap.
In one embodiment, the needle tube further comprises a protecting sleeve, the protecting sleeve is cylindrical, one end of the outer needle cap, which is far away from the inner needle cap, is provided with a clamping conical table, the protecting sleeve is covered outside the outer needle tube, and the end part of the protecting sleeve is clamped on the clamping conical table.
In one embodiment, the communicating cavity is in a conical structure, the small end of the communicating cavity is aligned with and communicated with the outer needle tube, and the diameter of the small end of the communicating cavity is consistent with the diameter of the through hole of the outer needle tube.
In one embodiment, the cleaning device further comprises a cleaning part, wherein the cleaning part comprises a cleaning cylinder and a blocking mechanism, the cleaning cylinder is in a hollow conical cylinder shape, the cleaning cylinder is positioned in the communication cavity, a plurality of slits are formed in the lower section of the cleaning cylinder, and the cleaning cylinder is made of an elastic material; the blocking mechanism is arranged on the inner wall of the communication cavity.
In one embodiment, the blocking mechanism comprises:
the sliding groove is arranged on the inner wall of the communication cavity;
the first sliding block is in sliding fit in the sliding groove, one end of the first sliding block extends into the communication cavity, and the part of the first sliding block positioned in the communication cavity is conical;
The second sliding block is arranged in the sliding groove in a sliding way;
The elastic piece is arranged between the first sliding block and the second sliding block and is connected with the second sliding block and the first sliding block;
the adjusting rod is in threaded fit on the outer needle cap, and the tail end of the adjusting rod abuts against the second sliding block.
In one embodiment, the safety device further comprises a pressure relief protection hole, wherein the pressure relief protection hole is arranged on the outer needle cap, one end of the pressure relief protection hole is communicated with the sliding groove, and the other end of the pressure relief protection hole is communicated with the outside.
In one embodiment, the wiping part further comprises a connecting rope, one end of the connecting rope is connected with the wiping cylinder, the other end of the connecting rope is connected with the inner needle cap, and the connecting rope is long enough to facilitate the inner needle core to be pulled out from the outer needle tube.
In one embodiment, the small end of the wiping cylinder is provided with a convex wiping block protruding towards the central axis and a liquid storage cavity, the convex wiping block is of a flexible porous structure, liquid for cleaning and disinfection is stored in the liquid storage cavity, and the liquid storage cavity is communicated with the convex wiping block.
The above-mentioned one or more technical solutions in the embodiments of the present invention at least have the following technical effects or advantages:
According to the ultrasonic enhanced nerve blocking needle provided by the embodiment of the invention, the inner needle core is arranged in the outer needle tube, and in the process that the outer needle tube penetrates into the skin to reach the nerve tissue position, the inner needle core can seal the through hole of the outer needle tube, so that the outer needle tube is prevented from being blocked in the process, the reliability and the operation convenience of the blocking needle are improved, and when the blocking needle enters an injection position, the inner needle core is pulled out, so that the smoothness of the through hole in the outer needle tube can be ensured, and the medicine injection is facilitated.
And the outer needle tube is fixed on the outer needle cap, the inner needle core is fixed on the inner needle cap, and the inner needle core and the outer needle tube are positioned conveniently by utilizing the buckling fit between the inner needle cap and the outer needle cap.
In addition, after the nerve block needle is penetrated into the skin tissue, in order to check whether the needle tip enters the blood vessel, the traditional nerve block needle is usually judged in a back-drawing mode (namely, the needle tip is penetrated through the blood vessel when blood flows into the syringe by using the syringe and the like, so that the position of the needle tip needs to be readjusted to avoid serious complications caused by injecting gunpowder into the blood vessel), but the medicine (gunpowder) in the syringe is easily diluted and polluted by the blood pumped in the back-drawing mode, and the nerve block effect is affected. In the ultrasonic enhanced nerve blocking needle, when the nerve blocking needle is penetrated into skin tissues (reaching an injection area), the inner needle core is extracted to enable the through hole of the outer needle tube to be kept smooth, and meanwhile, whether the needle tip penetrates through a blood vessel can be judged by observing whether blood stains are adhered on the surface of the inner needle core (if the needle tip penetrates through the blood vessel, blood permeates along a gap between the inner needle core and the outer needle tube, so that the surface of the inner needle core is stained with the blood stains). Thereby solving the problems of dilution or pollution of the medicine in the injector caused by the traditional back-pumping mode while judging whether the needle tip penetrates through the blood vessel.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of an ultrasonic-enhanced nerve block needle according to an embodiment of the present invention;
FIG. 2 is a schematic view of the structure of an outer needle tube and an outer needle cap according to an embodiment of the present invention;
FIG. 3 is a schematic view of the structure of the inner needle core and the inner needle cap according to the embodiment of the present invention;
FIG. 4 is a schematic view of a wiping cylinder according to an embodiment of the present invention;
Fig. 5 is a cross-sectional view of an ultrasonically-enhanced nerve-blocking needle provided by an embodiment of the present invention;
FIG. 6 is an enlarged view of a portion of FIG. 5 at A;
Fig. 7 is a schematic view of the structure of the small end of the wiping cylinder according to the embodiment of the invention.
Wherein, each reference sign is as follows:
1. An outer needle tube; 2. an outer needle cap; 3. an inner needle core; 4. an inner needle cap; 5. a protective sleeve; 6. a wiping part; 21. positioning the connecting part; 22. clamping the conical table; 23. an anti-skid groove; 24. a communicating cavity; 41. positioning the plugboard; 61. a wiping cylinder; 62. a blocking mechanism; 63. a connecting rope; 211. a cylinder; 212. a flash block; 611. cutting; 612. a raised wiping block; 613. a liquid storage cavity; 621. a chute; 622. a first slider; 623. a second slider; 624. an elastic member; 625. an adjusting rod; 626. and releasing the pressure to protect the hole.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Referring to fig. 1 to 3, an embodiment of the present application provides an ultrasonic-enhanced nerve block needle, which comprises an inner needle cap 4, an outer needle cap 2, an inner needle core 3 and an outer needle tube 1. Wherein, a through hole is arranged in the outer needle tube 1; the outer needle cap 2 is connected with the outer needle tube 1, a communication cavity 24 is arranged in the outer needle cap 2, and the communication cavity 24 is connected with a through hole of the outer needle tube 1; the inner needle core 3 passes through the communication cavity 24 and is inserted into the through hole of the outer needle tube 1; the inner needle cap 4 is connected with one end of the inner needle core 3, the inner needle cap 4 can be buckled on the outer needle cap 2, and when the inner needle cap 4 is buckled with the outer needle cap 2, the other end of the inner needle core 3 extends out of the outer needle tube 1.
Specifically, the inner needle core 3 and the outer needle tube 1 are made of metal materials, and specifically can be stainless steel. The diameter of the inner needle core 3 is slightly smaller than the diameter of the through hole of the outer needle tube 1. When the inner needle cap 4 is buckled with the outer needle cap 2, the other end of the inner needle core 3 is exposed out of the outer needle tube 1 by about 1 millimeter.
Before use, on inner needle cap 4 lock and the outer needle cap 2, interior needle core 3 inserts the cooperation in the through-hole of outer needle tubing 1, through giving inner needle cap 4 down force, pierce outer needle tubing 1 to patient's skin tissue below, the tip position of outer needle tubing 1 is provided with the heliciform recess of being convenient for carry out ultrasonic identification, the accurate judgement needle depth of down is realized to cooperation ultrasonic technique, when outer needle tubing 1 reaches predetermined degree of depth, can be with the interior needle core 3 of the shutoff outer needle tubing 1 through-hole originally follow outer needle tubing 1 through upwards pulling out inner needle cap 4 this moment, ensure that the through-hole of outer needle tubing 1 is unobstructed, then with injection device (specifically can be syringe or injection tube) be connected to outer needle cap 2, can carry out the injection of gunpowder, in order to realize nerve block.
In one embodiment, the end of the inner needle core 3 and the end of the outer needle tube 1 are inclined planes, and the included angle between the inclined plane of the inner needle core 3 and the central axis of the inner needle core 3 is smaller than the included angle between the inclined plane of the outer needle tube 1 and the axis of the outer needle tube 1.
Because the included angle between the inclined plane of the inner needle core 3 and the central axis of the inner needle core 3 is smaller, the tip of the inner needle core 3 is sharper, and the included angle between the inclined plane of the outer needle tube 1 and the axis of the outer needle tube 1 is larger, so that the tip of the outer needle tube 1 is flatter. When the blocking needle pierces the skin tissue of the patient, the sharp inner needle core 3 can easily pierce the skin of the patient because the tip of the inner needle core 3 protrudes from the outer needle tube 1, so that the blocking needle can smoothly drop to a predetermined depth. And then the inner needle core 3 is extracted from the outer needle tube 1, at the moment, only the outer needle tube 1 is left in subcutaneous tissue of a patient, and the tip of the outer needle tube 1 is relatively blunt, so that the outer needle tube 1 is not easy to stab peripheral blood vessels and nerve tissues in the process of connecting the outer needle cap 2 with an injection device and injecting gunpowder, and the patient is better protected from secondary injury.
As shown in fig. 2, in one embodiment, a positioning connection part 21 is provided at one end of the outer needle cap 2 near the inner needle cap 4, and the positioning connection part 21 includes a cylinder 211 and a flash block 212 provided at the end of the cylinder 211; when the inner needle cap 4 is buckled with the outer needle cap 2, the flash block 212 abuts against the inner wall of the inner needle cap 4. When the inner needle cap 4 is buckled with the outer needle cap 2, two ends of the flash block 212 are abutted and clamped with the inner wall of the inner needle cap 4 (the inner wall of the inner needle cap 4 is provided with an inclined surface) so as to position and fix the inner needle cap 4. When the outer needle cap 2 needs to be connected with the injection device, an output port of the injection device is inserted and matched into the cylinder 211, and a nut locking ring movably arranged on the injection device gives locking force between the injection device and the outer needle cap 2 in a threaded matching mode with the flash block 212, so that the injection device is in sealed connection with the outer needle cap 2. Therefore, the positioning connection part 21 not only can realize positioning and fixing of the inner needle cap 4, but also can realize sealing connection between the injection device and the outer needle cap 2 (namely sealing connection between the injection device and the outer needle tube 1) in cooperation with the nut locking ring of the injection device.
In one embodiment, the needle tube further comprises a protecting sleeve 5, the protecting sleeve 5 is cylindrical 211, a clamping conical table 22 is arranged at one end of the outer needle cap 2 away from the inner needle cap 4, the protecting sleeve 5 is covered outside the outer needle tube 1, and the end part of the protecting sleeve 5 is clamped on the clamping conical table 22. The protective sleeve 5 can be made of plastic material, and the protective sleeve 5 is sleeved on the clamping conical table 22, so that the outer needle tube 1 is hidden in the protective sleeve 5, accidental puncture of a user by the outer needle tube 1 is avoided, and the use safety of the blocking needle is improved.
As shown in fig. 3, optionally, one end of the inner needle cap 4, which is close to the outer needle cap 2, is provided with an outwardly extending positioning insertion plate 41, and a positioning slot is formed at a corresponding position of the outer needle cap 2, and when the inner needle cap 4 is buckled with the outer needle cap 2, the positioning insertion plate 41 is in plug-in fit with the positioning slot.
In one embodiment, the communicating cavity 24 is in a conical structure, the small end of the communicating cavity 24 is aligned with and communicated with the outer needle tube 1, and the small end diameter of the communicating cavity 24 is consistent with the diameter of the through hole of the outer needle tube 1. By providing the communication cavity 24 in a tapered shape and providing the small end diameter of the communication cavity 24 to be identical to the diameter of the through hole of the outer needle cannula 1, when the inner needle core 3 is required to be inserted into the outer needle cannula 1 (e.g., during the production and installation of a blocking needle), the tapered communication cavity 24 can play a guiding role, so that the inner needle core 3 can be easily and smoothly inserted into the through hole of the outer needle cannula 1 along the communication cavity 24.
The ultrasonic enhanced nerve block needle provided in this embodiment can judge whether the needle tip penetrates through the blood vessel by withdrawing the inner needle core 3, so as to replace the conventional withdrawal method. However, if the surface of the inner needle core 3 is already adhered with blood stains, which means that the needle tip penetrates through the blood vessel, the position of the needle tip needs to be adjusted, and whether the needle tip penetrates through the blood vessel again needs to be judged after the needle tip is adjusted, so that the blood stains on the surface of the inner needle core 3 need to be cleaned and reinserted into the outer needle tube 1 (meanwhile, the outer needle tube 1 is prevented from being blocked by human tissues in the process of adjusting the needle tip position). But the time taken for nerve block is prolonged due to the addition of the step of cleaning the inner core 3 externally, especially when the nerve block is performed for patients requiring an urgent operation.
For this purpose, as shown in fig. 5-6, in one embodiment, the cleaning part 6 further includes a cleaning part 6, where the cleaning part 6 includes a cleaning cylinder 61 and a blocking mechanism 62, the cleaning cylinder 61 is in a hollow conical cylinder 211, the cleaning cylinder 61 is located in the communication cavity 24, a plurality of slits 611 are formed at a lower section of the cleaning cylinder 61, and the cleaning cylinder 61 is made of an elastic material (the cleaning cylinder 61 may be made of a metal sheet specifically); the blocking mechanism 62 is provided on the inner wall of the communication cavity 24.
When the blood stain on the inner needle core 3 needs to be cleaned, the inner needle core 3 is only required to be inserted into the communication cavity 24 of the outer needle cap 2, the inner needle core 3 penetrates into the wiping cylinder 61, and when a certain friction force exists between the inner needle core 3 and the wiping cylinder 61, the friction force promotes the wiping cylinder 61 to move downwards, and then the lower section of the wiping cylinder 61 is deformed, so that the small end (bottom end) of the wiping cylinder 61 is tightened and contracted, the friction between the wiping cylinder 61 and the inner needle core 3 is aggravated, and the blood stain on the inner needle core 3 is wiped and cleaned by the small end of the wiping cylinder 61 (in order to improve the wiping effect, the wiping part 6 can be arranged at the small end of the wiping cylinder 61), so that the judgment of the inner needle core 3 is continuously utilized.
When the inner needle core 3 is drawn out from the inner needle tube, the upper section of the inner needle core 3 is firstly contacted with the small end of the wiping cylinder 61 to be rubbed, so that the wiping cylinder 61 moves upwards for a certain distance under the action of the friction force, the small end of the wiping cylinder 61 is loosened to be widened, the friction between the small end of the wiping cylinder 61 and the inner needle core 3 is greatly reduced, blood stains on the inner needle core 3 (the blood stains on the inner needle core 3 are positioned on the lower half section of the inner needle core 3) can be basically saved, and whether the needle tip penetrates through a blood vessel is judged by observing the blood stains on the inner needle core 3. While the blocking mechanism 62 limits the amount of upward movement of the wiping cylinder 61, preventing the wiping cylinder 61 from being accidentally withdrawn from the communicating cavity 24 with the inner core 3.
As shown in fig. 7, in one embodiment, the small end of the wiping cylinder 61 is provided with a convex wiping block 612 protruding toward the central axis and a liquid storage cavity 613, the convex wiping block 612 is of a flexible porous structure (such as cotton, etc.), the liquid storage cavity 613 stores a liquid for cleaning and disinfection, and the liquid storage cavity 613 is communicated with the convex wiping block 612. When the inner needle core 3 is inserted into the outer needle tube 1, the small end of the wiping cylinder 61 is contracted, so that the liquid storage cavity 613 is extruded, and then liquid (particularly alcohol or the like) in the liquid storage cavity 613 can flow into the convex wiping block 612, and the wiping effect of the convex wiping block 612 is improved.
In one embodiment, the blocking mechanism 62 includes an adjustment lever 625, a first slider 622, a second slider 623, a resilient member 624, and a chute 621. The chute 621 is arranged on the inner wall of the communication cavity 24; the first sliding block 622 is slidably fitted in the sliding groove 621, one end of the first sliding block 622 extends into the communication cavity 24, and a portion of the first sliding block 622 located in the communication cavity 24 is tapered; the second sliding block 623 is slidably disposed in the sliding slot 621; the elastic member 624 is disposed between the first slider 622 and the second slider 623, and is connected to the second slider 623 and the first slider 622; the adjusting rod 625 is screwed on the outer needle cap 2, and the end of the adjusting rod 625 abuts against the second slide block 623. The protruding first slider 622 can function as a stop for the wiping cylinder 61, avoiding that the wiping cylinder 61 is accidentally withdrawn from the communication cavity 24 with the inner needle 3.
In order to avoid the phenomena of local swelling, induration, tissue injury and the like of a patient caused by too high injection speed when the gunpowder is injected, in one embodiment, the injection device further comprises a pressure relief protection hole 626, wherein the pressure relief protection hole 626 is arranged on the outer needle cap 2, one end of the pressure relief protection hole 626 is communicated with the chute 621, and the other end of the pressure relief protection hole 626 is communicated with the outside. When the injection speed is too high, the liquid medicine of the gunpowder in the communication cavity 24 is high in hydraulic pressure (when the medicine is injected, the pushing rod of the injection device (such as an injector) needs to be pushed by external force, and the gunpowder is pressed into the outer needle tube 1 by the given pressure, so that when the given pressure is high, the injection speed is high), at the moment, the first slider 622 moves towards the left side in fig. 6 against the elastic force of the elastic piece 624 (a spring or a shrapnel and the like) under the hydraulic drive, and because the right side of the first slider 622 is conical, after the first slider 622 slides towards the left side, the pressure relief protection hole 626 is communicated with the communication cavity 24, so that the gunpowder can be discharged from the pressure relief protection hole 626, the liquid medicine pressure is reduced, and the medicine injection speed is reduced, and the patient is prevented from being injured due to the too high injection speed.
In addition, by adjusting the adjusting lever 625, the compression state of the elastic member 624 can be adjusted, and thus the pressure relief threshold of the pressure relief protection hole 626 can be adjusted.
In one embodiment, the wiping part 6 further comprises a connecting cord 63, one end of the connecting cord 63 is connected to the wiping cylinder 61, the other end of the connecting cord 63 is connected to the inner needle cap 4, and the connecting cord 63 is long enough to facilitate the withdrawal of the inner needle core 3 from the outer needle tube 1. When the inner needle core 3 is drawn out from the outer needle tube 1 and no blood stain exists on the inner needle core 3 through observing the inner needle core 3, the needle point is not penetrated through a blood vessel, and medicine injection can be performed, at the moment, only the inner needle core 3 and the inner needle cap 4 need to be further drawn out, because the wiping cylinder 61 is drawn out from the communication cavity 24 of the outer needle cap 2 under the traction of the connecting rope 63 through the connecting rope 63 and the inner needle cap 4 (the wiping cylinder 61 moves upwards under the action of the pulling force of the connecting rope 63, when the wiping cylinder 61 contacts the first slide block 622, the exposed end of the first slide block 622 is conical, so that a horizontal left component force can be generated by the upward acting force of the top of the wiping cylinder 61 on the first slide block 622, and the first slide block 622 is retracted into the slide groove 621 under the action of the component force, so that the wiping cylinder 61 can be drawn out from the communication cavity 24). By taking the wiper cylinder 61 out of the communication cavity 24 before injecting the medicine, the influence of the nerve block effect caused by the contamination of the medicine by blood stains accumulated at the bottom of the wiper cylinder 61 is avoided.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (7)
1. An ultrasonically enhanced nerve block needle, the ultrasonically enhanced nerve block needle comprising:
the outer needle tube is internally provided with a through hole;
The outer needle cap is connected with the outer needle tube, a communication cavity is arranged in the outer needle cap, and the communication cavity is connected with a through hole of the outer needle tube;
the inner needle core penetrates through the communication cavity and is inserted into the through hole of the outer needle tube;
the inner needle cap is connected with one end of the inner needle core, the inner needle cap can be buckled on the outer needle cap, and when the inner needle cap is buckled with the outer needle cap, the other end of the inner needle core extends out of the outer needle tube;
The communicating cavity is of a conical structure, the small end of the communicating cavity is aligned and communicated with the outer needle tube, and the diameter of the small end of the communicating cavity is consistent with the diameter of the through hole of the outer needle tube;
The cleaning device comprises a communication cavity, and is characterized by further comprising a cleaning part, wherein the cleaning part comprises a cleaning cylinder and a blocking mechanism, the cleaning cylinder is in a hollow conical cylinder shape, the cleaning cylinder is positioned in the communication cavity, a plurality of slits are formed in the lower section of the cleaning cylinder, and the cleaning cylinder is made of elastic materials; the blocking mechanism is arranged on the inner wall of the communication cavity, and plays a role in blocking the wiping cylinder, so that the wiping cylinder is prevented from being accidentally pulled out of the communication cavity along with the inner needle core;
The small end of the wiping cylinder is provided with a convex wiping block protruding towards the central axis and a liquid storage cavity, the convex wiping block is of a flexible porous structure, liquid for cleaning and disinfection is stored in the liquid storage cavity, and the liquid storage cavity is communicated with the convex wiping block.
2. An ultrasonically enhanced nerve block needle as claimed in claim 1, wherein:
The tail end of the inner needle core and the tail end of the outer needle tube are inclined planes, and an included angle between the inclined plane of the inner needle core and the central axis of the inner needle core is smaller than an included angle between the inclined plane of the outer needle tube and the axis of the outer needle tube.
3. An ultrasonically enhanced nerve block needle as claimed in claim 1, wherein:
one end of the outer needle cap, which is close to the inner needle cap, is provided with a positioning connection part, and the positioning connection part comprises a cylinder and a flash block arranged at the tail end of the cylinder; when the inner needle cap is buckled with the outer needle cap, the flash block abuts against the inner wall of the inner needle cap.
4. An ultrasonically enhanced nerve block needle as claimed in claim 1, wherein:
Still include the protective sheath, the protective sheath is cylindricly, outer needle cap keep away from the one end of interior needle cap is provided with chucking toper platform, the protective sheath cover is located outer needle tubing is outside, just the tip joint of protective sheath in on the chucking toper platform.
5. The ultrasonically enhanced nerve block needle of claim 1, wherein the blocking mechanism comprises:
the sliding groove is arranged on the inner wall of the communication cavity;
the first sliding block is in sliding fit in the sliding groove, one end of the first sliding block extends into the communication cavity, and the part of the first sliding block positioned in the communication cavity is conical;
The second sliding block is arranged in the sliding groove in a sliding way;
The elastic piece is arranged between the first sliding block and the second sliding block and is connected with the second sliding block and the first sliding block;
the adjusting rod is in threaded fit on the outer needle cap, and the tail end of the adjusting rod abuts against the second sliding block.
6. An ultrasonically enhanced nerve block needle as claimed in claim 5, wherein:
the pressure relief protection device is characterized by further comprising a pressure relief protection hole, wherein the pressure relief protection hole is arranged on the outer needle cap, one end of the pressure relief protection hole is communicated with the sliding groove, and the other end of the pressure relief protection hole is communicated with the outside.
7. An ultrasonically enhanced nerve block needle as claimed in claim 5, wherein:
The wiping part further comprises a connecting rope, one end of the connecting rope is connected with the wiping cylinder, the other end of the connecting rope is connected with the inner needle cap, and the connecting rope is long enough to facilitate the inner needle core to be pulled out of the outer needle tube.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410329181.6A CN118000860B (en) | 2024-03-21 | 2024-03-21 | Ultrasound-enhanced nerve block needle |
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|---|---|---|---|
| CN202410329181.6A CN118000860B (en) | 2024-03-21 | 2024-03-21 | Ultrasound-enhanced nerve block needle |
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| CN118000860A CN118000860A (en) | 2024-05-10 |
| CN118000860B true CN118000860B (en) | 2024-11-19 |
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| CN202410329181.6A Active CN118000860B (en) | 2024-03-21 | 2024-03-21 | Ultrasound-enhanced nerve block needle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN219439367U (en) * | 2023-04-04 | 2023-08-01 | 张鑫磊 | An Improved Nerve Blocking Needle |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009519104A (en) * | 2005-12-12 | 2009-05-14 | クック クリティカル ケア インコーポレーテッド | High intensity echo stimulation block needle |
| CN107530491A (en) * | 2015-05-12 | 2018-01-02 | 福建省百仕韦医用高分子股份有限公司 | The open indwelling needle of plane-of-weakness joint type protective case |
| CN212281551U (en) * | 2020-03-02 | 2021-01-05 | 嘉兴市第一医院 | An enhanced ultrasound imaging nerve block needle |
| CN213129800U (en) * | 2020-07-23 | 2021-05-07 | 中国人民解放军陆军军医大学第二附属医院 | Retraction detection type nerve blocking needle |
| CN215688318U (en) * | 2021-09-03 | 2022-02-01 | 华北理工大学 | Improved nerve block needle |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN219439367U (en) * | 2023-04-04 | 2023-08-01 | 张鑫磊 | An Improved Nerve Blocking Needle |
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