CN111991062B - Nerve blocking needle with resistance feedback - Google Patents
Nerve blocking needle with resistance feedback Download PDFInfo
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- CN111991062B CN111991062B CN202010916261.3A CN202010916261A CN111991062B CN 111991062 B CN111991062 B CN 111991062B CN 202010916261 A CN202010916261 A CN 202010916261A CN 111991062 B CN111991062 B CN 111991062B
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- liquid inlet
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3401—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, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3403—Needle locating or guiding means
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00017—Electrical control of surgical instruments
- A61B2017/00115—Electrical control of surgical instruments with audible or visual output
- A61B2017/00119—Electrical control of surgical instruments with audible or visual output alarm; indicating an abnormal situation
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00017—Electrical control of surgical instruments
- A61B2017/00115—Electrical control of surgical instruments with audible or visual output
- A61B2017/00128—Electrical control of surgical instruments with audible or visual output related to intensity or progress of surgical action
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3403—Needle locating or guiding means
- A61B2017/3413—Needle locating or guiding means guided by ultrasound
Abstract
The invention relates to the field of medical instruments, and particularly discloses a nerve block needle with resistance feedback, which comprises a needle core, a needle seat, a pressure observation mechanism and an injection mechanism, wherein the pressure observation mechanism comprises a first cylinder, a second cylinder and a U-shaped tube pressure gauge; a first accommodating chamber is formed in the first cylinder, the second cylinder is arranged in the first accommodating chamber, and a second accommodating chamber is formed in the second cylinder; the elastic plugging mechanism is movably matched in the second accommodating cavity along the height direction, one end of the elastic plugging mechanism penetrates through the bottom of the second accommodating cavity and then is matched with the liquid inlet, and one end of the U-shaped tube pressure gauge is communicated with the liquid outlet. The nerve blocking needle is used for visually observing the liquid level in the U-shaped tube pressure gauge, so that an operator can conveniently master the resistance condition when injecting a medicine in real time, the judgment is made, the position of the needle core is adjusted, the injection of the medicine liquid is smoothly completed, and the nerve blocking needle has important clinical significance.
Description
Technical Field
The invention relates to the field of medical instruments, in particular to a nerve block needle with resistance feedback.
Background
At present, nerve block under ultrasonic guidance is widely developed clinically, and plays an important role in relieving postoperative pain of patients, reducing the use amount of central analgesic drugs and accelerating postoperative rehabilitation. The ultrasonic-guided visualization technology changes the mode of blind detection in the past, and is more accurate, safe and convenient for teaching.
However, ultrasound guidance also presents problems in that the operator is required to hold the ultrasound probe in one hand and operate the nerve block needle in the other hand during operation. Additional personnel are required to withdraw and bolus the medication. The double operation requires the assistant to have rich related experience to accurately sense whether the pressure of pushing the medicine is too large and the medicine injection speed is normal. However, in clinical work, an anesthesiologist can only seek the assistance of a nurse, and the resistance encountered during the drug injection is difficult to be accurately fed back to an operator, so that the operator is inconvenient to adjust quickly. Meanwhile, the speed of drug injection is difficult to be accurately grasped, thereby increasing the risk of drug injection in nerves and local anesthesia drug poisoning. How to avoid the risks has a profound influence on the success rate of nerve block under ultrasonic guidance.
Disclosure of Invention
In view of the above, the present invention is directed to overcoming the drawbacks of the prior art and providing a neural blocking needle with resistance feedback.
In order to solve the technical problems, the invention adopts the following technical scheme:
a nerve block needle with resistance feedback comprises a needle core, a needle seat, a pressure observation mechanism and an injection mechanism; the needle core is arranged on the needle seat, an inner chamber is arranged in the needle seat in a left-right through mode, two ends of the inner chamber are respectively communicated with the needle core and the injection mechanism, and the injection mechanism is used for injecting or withdrawing liquid medicine; the pressure observation mechanism comprises a first cylinder, a second cylinder and a U-shaped pipe pressure gauge; the first cylinder is arranged at the top of the needle seat, a first accommodating cavity is formed in the first cylinder, a liquid outlet is formed in the top of the first cylinder, a liquid inlet is formed in the bottom of the first cylinder, and the liquid inlet and the liquid outlet are both communicated with the first accommodating cavity; a liquid discharge hole communicated with the inner chamber is arranged on the needle seat and communicated with the liquid inlet; the second cylinder is arranged in the first accommodating chamber, a gap is formed between the second cylinder and the bottom wall of the first accommodating chamber, and a second accommodating chamber is formed in the second cylinder; the elastic plugging mechanism is movably matched in the second accommodating cavity along the height direction, and one end of the elastic plugging mechanism penetrates through the bottom of the second accommodating cavity and then is matched with the liquid inlet; the U-shaped tube pressure gauge is installed on the first barrel, and one end of the U-shaped tube pressure gauge is communicated with the liquid outlet.
Preferably, the elastic plugging mechanism comprises a baffle, a connecting rod, a plug and an elastic piece; the baffle, the connecting rod and the plug are sequentially connected from top to bottom, the baffle is movably matched in the second accommodating chamber along the height direction, and the connecting rod penetrates through the bottom of the second accommodating chamber in a sealing and sliding manner; the plug is used for plugging the liquid inlet; the elastic piece is arranged above the baffle, and two ends of the elastic piece respectively abut against the top wall of the second accommodating chamber and the baffle.
Preferably, the edge of the liquid inlet close to one end of the plug is provided with a chamfer, and the outer contour of the plug is provided with a conical surface matched with the chamfer.
Preferably, the top of the second cylinder is connected with the top wall of the first cylinder through a connecting column; the screw hole sequentially penetrates through the top of the first cylinder, the connecting column and the top of the second cylinder from top to bottom and is communicated with the second accommodating chamber; the adjusting mechanism comprises a pressing plate, a screw rod and a guide rod, the pressing plate is vertically and movably matched in the second accommodating cavity, and the pressing plate is positioned above the elastic piece; the screw is in threaded fit in the screw hole, one end of the screw is rotatably connected with the pressure plate, and the other end of the screw extends out of the first cylinder; the guide rod is vertically arranged on the top wall of the second accommodating cavity, a guide hole in sliding fit with the guide rod is formed in the pressing plate, and the guide rod is sleeved in the guide hole in a penetrating mode.
Preferably, a bracket is arranged on the needle seat, support lugs are arranged on two sides of the first cylinder body, the two support lugs are respectively and rotatably matched on the bracket, and the rotating axis of the first cylinder body is vertical to the central axis of the needle core; the bottom of the first cylinder is provided with a balancing weight; the liquid discharge hole is connected with the liquid inlet through a connecting hose.
Preferably, the injection mechanism comprises an injector, a push-pull plate, a pressure sensor, a pressure alarm device and a constant-speed driving assembly; the injector comprises a tube body, a piston and a push rod, wherein the tube body is fixed on the base and is connected with the inner chamber through a liquid inlet hose; the piston is movably matched in the tube body, and one end of the push rod is connected with the piston; the constant-speed driving assembly is arranged on the base, the push-pull plate is connected to the constant-speed driving assembly, one end of the push rod, far away from the piston, is connected to the push-pull plate, and the constant-speed driving assembly is used for driving the push-pull plate to move at a constant speed along the central axis direction of the pipe body; the pressure sensor is arranged between the push rod and the push-pull plate and connected with the pressure alarm device, and the pressure alarm device is arranged on the base.
Preferably, the constant-speed driving assembly comprises a motor, a screw rod, a nut, two supports and two sliding rods; the two supports are arranged on the base at intervals, two ends of the screw rod rotate on the two supports respectively, and one end of the screw rod penetrates through the support on the corresponding side and is connected with a first gear; the nut is in threaded fit with the screw rod and is fixed on the push plate; the motor is arranged on a support close to the first gear, a rotating shaft of the motor penetrates through the support and then is connected with a second gear, the second gear is in meshing transmission with the first gear, and the diameter of the first gear is larger than that of the second gear; the two sliding rods are arranged on two sides of the screw rod in parallel, and the two sliding rods are sleeved on the push plate in a penetrating mode.
Preferably, the pressure alarm device comprises a signal amplifier, an A/D converter, a processor and an alarm; the pressure sensor is connected with the signal amplifier, the signal amplifier is connected with the A/D converter, the A/D converter is connected with the processor, and the processor is connected with the alarm.
Preferably, the forward rotation switch and the reverse rotation switch of the motor are both arranged on the needle base.
The invention has the beneficial effects that:
the invention discloses a nerve block needle with resistance feedback, wherein a needle seat is provided with a pressure observation mechanism, when an injection mechanism injects liquid medicine at a constant speed, the liquid medicine enters a needle core through an inner chamber, and when the needle core touches fascia or other soft tissues, the needle core can bear obvious resistance. At the moment, the liquid medicine is blocked by fascia or soft tissue, the pressure of the liquid medicine in the needle core and the inner chamber is increased, and the injection mechanism continues to keep a constant-speed injection state, so that the liquid medicine in the liquid discharge hole of the inner chamber can upwards push the elastic blocking mechanism to upwards contract under the action of pressure, so that the elastic blocking mechanism is separated from the liquid inlet, and the liquid medicine enters the first accommodating chamber from the liquid inlet.
Because the liquid outlet of the first accommodating cavity is communicated with the U-shaped tube pressure gauge, and the liquid inlet is plugged by the elastic plugging mechanism, the liquid medicine can compress the air in the first accommodating cavity after entering the first accommodating cavity, and pushes the air in the first accommodating cavity into the U-shaped tube pressure gauge from the liquid outlet, so that the liquid level in the U-shaped tube pressure gauge generates a height difference. If the liquid level difference in the U-shaped tube pressure gauge exceeds the early-stage experimental range, the situation that the position of the needle core is not good at the moment and the medicine injection resistance is increased is shown.
The nerve blocking needle is used for visually observing the liquid level in the U-shaped tube pressure gauge, so that an operator can conveniently master the resistance condition when injecting a medicine in real time, and make a judgment to adjust the position of the needle core so as to smoothly complete injection of the medicine liquid. The not enough in the communication when having avoided two people to operate, or because the misoperation that the assistant experience is not enough leads to, even single independent operation puncture, also can judge the position of nook closing member and inject the resistance condition that receives through pressure observation mechanism directly perceivedly to be convenient for make the adjustment rapidly, accomplish the liquid medicine accurately and inject, have important clinical meaning.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a schematic structural diagram of a nerve block needle with resistance feedback according to the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is a diagram showing the state of the liquid medicine entering the first accommodating chamber;
FIG. 4 is a schematic view of the structure of the first cylinder engaged with the bracket;
fig. 5 is a block diagram of a pressure alarm.
Reference numerals:
1-needle core, 2-needle seat, 21-inner chamber, 22-liquid discharge hole, 3-pressure observation mechanism, 31-first cylinder, 311-first containing chamber, 312-liquid outlet, 313-liquid inlet, 314-lug, 315-balancing weight, 32-second cylinder, 321-second containing chamber, 33-U-shaped tube pressure gauge, 34-connecting column, 4-injection mechanism, 41-injector, 411-tube body, 412-push rod, 42-push-pull plate, 43-pressure sensor, 44-pressure alarm device, 441-signal amplifier, 442-A/D converter, 443-processor, 444-alarm, 45-constant speed driving component, 451-motor, 452-screw rod, 453-nut, 454-support, 455-slide bar, 456-first gear, 457-second gear, 458-forward switch, 459-reverse switch, 5-elastic plugging mechanism, 51-baffle, 52-connecting rod, 53-plug, 54-elastic piece, 6-adjusting mechanism, 61-pressing plate, 62-screw rod, 63-guide rod, 7-support, 8-connecting hose, 9-base and 10-liquid inlet hose.
Detailed Description
The present invention will be described in further detail with reference to examples.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 and 2, the nerve block needle with resistance feedback of the present invention includes a needle core 1, a needle base 2, a pressure observation mechanism 3 and an injection mechanism 4; the needle core 1 is arranged on the needle seat 2, an inner chamber 21 is arranged in the needle seat 2 in a left-right through way, two ends of the inner chamber 21 are respectively communicated with the needle core 1 and the injection mechanism 4, and the injection mechanism 4 is used for injecting or withdrawing liquid medicine; the pressure observation mechanism 3 comprises a first cylinder 31, a second cylinder 32 and a U-shaped tube pressure gauge 33; the first cylinder 31 is arranged at the top of the needle base 2, a first accommodating cavity 311 is formed in the first cylinder 31, a liquid outlet 312 is arranged at the top of the first cylinder 31, a liquid inlet 313 is arranged at the bottom of the first cylinder 31, and both the liquid inlet 313 and the liquid outlet 312 are communicated with the first accommodating cavity 311; a liquid discharge hole 22 communicated with the inner chamber 21 is arranged on the needle seat 2, and the liquid discharge hole 22 is communicated with the liquid inlet 313; the second cylinder 32 is arranged in the first accommodating chamber 311, a gap is formed between the second cylinder 32 and the bottom wall of the first accommodating chamber 311, and a second accommodating chamber 321 is formed in the second cylinder 32; the elastic plugging device further comprises an elastic plugging mechanism 5, the elastic plugging mechanism 5 is movably matched in the second accommodating cavity 321 along the height direction, and one end of the elastic plugging mechanism 5 penetrates through the bottom of the second accommodating cavity 321 and then is matched with the liquid inlet 313; a U-tube pressure gauge 33 is mounted on the first cylinder 31, and one end of the U-tube pressure gauge 33 communicates with the liquid outlet 312.
The invention discloses a nerve block needle with resistance feedback, wherein a needle seat 2 is provided with a pressure observation mechanism 3, when an injection mechanism 4 injects liquid medicine at a constant speed, the liquid medicine enters a needle core 1 through an inner chamber 21, and when the needle core 1 touches fascia or other soft tissues, the needle core can bear obvious resistance. At this time, the pressure of the liquid medicine in the needle core 1 and the inner chamber 21 is increased due to the plugging of fascia or soft tissue, and the injection mechanism 4 continues to keep a constant-speed injection state, so that the liquid medicine in the liquid discharge hole 22 of the inner chamber 21 can push the elastic plugging mechanism 5 upwards to contract under the pressure, so that the elastic plugging mechanism 5 is separated from the liquid inlet 313, and the liquid medicine enters the first accommodating chamber 311 from the liquid inlet 313.
Since the liquid outlet 312 of the first accommodating chamber 311 is communicated with the U-tube pressure gauge 33 and the liquid inlet 313 is blocked by the elastic blocking mechanism 5, the liquid medicine enters the first accommodating chamber 311 and then compresses the air in the first accommodating chamber 311, and pushes the air in the first accommodating chamber 311 into the U-tube pressure gauge 33 from the liquid outlet 312, so that a height difference is generated in the liquid level in the U-tube pressure gauge 33. If the liquid level difference in the U-shaped tube pressure gauge 33 exceeds the early experimental range, the position of the needle core 1 is not good at the moment, and the medicine injection resistance is increased.
The nerve blocking needle is convenient for an operator to master the resistance condition of the medicine during injection in real time by visually observing the liquid level in the U-shaped tube pressure gauge 33, so that judgment is made, the position of the core 1 of the needle is adjusted, and the injection of the medicine liquid is smoothly completed. The not enough in the communication when having avoided two people to operate, or because the misoperation that the assistant experience is not enough leads to, even single independent operation puncture, also can judge the position of nook closing member and inject the resistance condition that receives through pressure observation mechanism 3 directly perceivedly to be convenient for make the adjustment rapidly, accomplish the liquid medicine accurately and inject, have important clinical meaning.
Specifically, the elastic plugging mechanism 5 comprises a baffle 51, a connecting rod 52, a plug 53 and an elastic piece 54; the baffle 51, the connecting rod 52 and the plug 53 are sequentially connected from top to bottom, the baffle 51 is movably matched in the second accommodating chamber 321 along the height direction, and the connecting rod 52 hermetically and slidably penetrates through the bottom of the second accommodating chamber 321; the plug 53 is used for plugging the liquid inlet 313; the elastic member 54 is disposed above the baffle 51, and both ends of the elastic member 54 respectively abut against the top wall of the second accommodating chamber 321 and the baffle 51.
Through the previous experiment, the elastic member 54 with a proper elastic coefficient is selected, so that the liquid medicine in the liquid discharge hole 22 cannot push the plug 53 into the first accommodating chamber 311 in the normal pushing state. When the needle core 1 touches fascia or other soft tissues, the pressure of the liquid medicine in the needle core 1 and the inner chamber 21 is increased because the liquid medicine is blocked by the fascia or the soft tissues, and the injection mechanism 4 keeps a constant-speed injection state, so the liquid medicine in the liquid discharge hole 22 of the inner chamber 21 can be upwards pushed against the plug 53 under the action of pressure. Because there is a gap between the second cylinder 32 and the bottom wall of the first accommodating chamber 311, the plug 53 moves upward under the pushing of the liquid medicine and forms a gap with the liquid inlet 313, and the liquid medicine enters the first accommodating chamber 311 from the gap between the liquid inlet 313 and the plug 53.
In a specific embodiment, in order to facilitate the sealing engagement between the plug 53 and the liquid inlet 313, an edge of the liquid inlet 313 near one end of the plug 53 is provided with a chamfer, and the outer contour of the plug 53 is provided with a conical surface adapted to the chamfer.
In one embodiment, the top of the second cylinder 32 is connected to the top wall of the first cylinder 31 by a connecting column 34; the screw hole sequentially penetrates through the top of the first cylinder 31, the connecting column 34 and the top of the second cylinder 32 from top to bottom and is communicated with the second accommodating chamber 321; the adjusting mechanism 6 comprises a pressure plate 61, a screw 62 and a guide rod 63, wherein the pressure plate 61 is vertically and movably matched in the second accommodating chamber 321, and the pressure plate 61 is positioned above the elastic piece 54; the screw rod 62 is in threaded fit in the screw hole, one end of the screw rod 62 is rotatably connected with the pressure plate 61, and the other end of the screw rod 62 extends out of the first cylinder 31; the guide rod 63 is vertically arranged on the top wall of the second accommodating cavity 321, a guide hole in sliding fit with the guide rod 63 is formed in the pressing plate 61, and the guide rod 63 is sleeved in the guide hole in a penetrating mode. The screw 62 is operated to drive the pressing plate 61 to ascend or descend, and the distance between the baffle plate 51 and the pressing plate 61 is adjusted, so that the pressure of the elastic part 54 acting on the baffle plate 51 can be adjusted, and the tightness degree of the plugging of the plug 53 on the liquid inlet 313 is adjusted.
In a specific embodiment, the needle holder 2 is provided with a bracket 7, two sides of the first cylinder 31 are provided with support lugs 314, the two support lugs 314 are respectively and rotationally matched on the bracket 7, and the rotation axis of the first cylinder 31 is vertical to the central axis of the needle core 1; the bottom of the first cylinder 31 is provided with a balancing weight 315; the drain hole 22 is connected to the liquid inlet 313 via a connection hose 8. In the actual operation process, the positions of the puncture are different, so that the situation that the liquid level in the U-shaped tube pressure gauge 33 is blocked in the normal injection state or when the stylet 1 touches fascia or other soft tissues needs to be judged, and the first cylinder 31, the second cylinder 32 and the U-shaped tube pressure gauge 33 are always kept in the vertical state. Therefore, in the process of puncturing, when an operator holds the needle base 2 by hand, the side of the needle base 2 provided with the support 7 is required to be ensured to be always upward, and because the bottom of the first cylinder 31 is provided with the balancing weight 315 and the support lugs 314 on the two sides of the first cylinder 31 are rotatably matched on the support 7, the change of the puncturing angle of the needle core 1 cannot influence the first cylinder 31, the second cylinder 32 and the U-shaped tube pressure gauge 33 to be always kept in the vertical state. Due to the relative rotation between the first barrel 31 and the needle holder 2, the liquid discharge hole 22 is communicated with the liquid inlet 313 by the connecting hose 8.
Specifically, the injection mechanism 4 comprises an injector 41, a push-pull plate 42, a pressure sensor 43, a pressure alarm device 44 and a constant speed driving assembly 45; the injector 41 comprises a tube 411, a piston and a push rod 412, the tube 411 is fixed on the base 9, and the tube 411 is connected with the inner chamber 21 through a liquid inlet hose 10; the piston is movably matched in the tube body 411, and one end of the push rod 412 is connected with the piston; the constant-speed driving assembly 45 is installed on the base 9, the push-pull plate 42 is connected to the constant-speed driving assembly 45, one end of the push rod 412, far away from the piston, is connected to the push-pull plate 42, and the constant-speed driving assembly 45 is used for driving the push-pull plate 42 to move at a constant speed along the central axis direction of the pipe body 411; the pressure sensor 43 is arranged between the push rod 412 and the push-pull plate 42, the pressure sensor 43 is connected with the pressure alarm device 44, and the pressure alarm device 44 is arranged on the base 9. The uniform-speed driving assembly 45 drives the push plate to move at a uniform speed along the central axis direction of the tube body 411, so that the push plate can push/pull the push rod 412 at a uniform speed, thereby realizing the injection or the withdrawal of the liquid medicine and further enabling an operator to independently control the medicine to enter and exit.
Further, the constant speed driving assembly 45 comprises a motor 451, a screw rod 452, a nut 453, two supports 454 and two sliding rods 455; the two supports 454 are arranged on the base 9 at intervals, two ends of the screw rod 452 respectively rotate on the two supports 454, and one end of the screw rod 452 penetrates through the support 454 on the corresponding side and is connected with a first gear 456; a nut 453 is in threaded fit with the lead screw 452, and the nut 453 is fixed on the push-pull plate 42; the motor 451 is arranged on a support 454 close to the first gear 456, a second gear 457 is connected with the rotating shaft of the motor 451 after penetrating through the support 454, the second gear 457 is in meshing transmission with the first gear 456, and the diameter of the first gear 456 is larger than that of the second gear 457; two sliding rods 455 are arranged in parallel at two sides of the screw rod 452, and the two sliding rods 455 are sleeved on the push plate.
Because the diameter of the first gear 456 is larger than that of the second gear 457, when the motor 451 drives the first gear 456 to rotate, the first gear 456 drives the second gear 457 to rotate, and the rotation speed is reduced, so that the screw rod 452 rotates at a slow speed and a uniform speed. The rotation of the screw rod 452 drives the push plate to move stably and precisely along the central axis of the screw rod 452, so that the push plate can push/pull the push rod 412 at a constant speed, thereby injecting or withdrawing the liquid medicine.
When the needle core 1 touches fascia or other soft tissues, the pressure of the liquid medicine in the needle core 1 and the inner chamber 21 is increased due to the blockage of the fascia or the soft tissues, therefore, the thrust of the push plate acting on the push rod 412 is increased, the pressure sensor 43 inputs an electric signal to the pressure alarm device 44, and when the thrust of the push plate acting on the push rod 412 exceeds a maximum limited numerical value, the pressure alarm device 44 works to prompt an operator that the position of the needle core 1 is not good, the medicine injection is blocked, and the motor can be selected to be turned off. Through the combined action of the pressure sensor 43 and the pressure alarm device 44 on the injection mechanism 4 and the condition of the pressure observation mechanism 3 on the visual observation needle base 2, the position of the needle core 1 of an operator is convenient to prompt, and the medicine injection is not smooth.
Specifically, the pressure warning device 44 includes a signal amplifier 441, an a/D converter 442, a processor 443, and an alarm 444; the pressure sensor 43 is connected to a signal amplifier 441, the signal amplifier 441 is connected to an a/D converter 442, the a/D converter 442 is connected to a processor 443, and the processor 443 is connected to an alarm 444. The pressure sensor 43 converts the pushing force of the push plate on the push rod 412 into an electric signal, then the electric signal is input into the signal amplifier 441, the electric signal is amplified by the signal amplifier 441, then the analog signal is transmitted into the A/D converter 442 to be converted into a digital signal, the digital signal is introduced into the processor 443 to be processed, and when the pressure value calculated by the processor 443 is greater than the set pressure value, the alarm 444 works to remind an operator that the needle core 1 is possibly blocked by fascia or soft tissue, so that corresponding measures can be taken in time.
In one embodiment, in order to facilitate the operation of the injector 41 to withdraw or inject the medicine, thereby automatically controlling the medicine to enter or exit, or turning off the motor in time to stop the injection, the forward switch 458 and the reverse switch 459 of the motor 451 are both disposed on the needle holder 2, and of course, the forward switch 458 and the reverse switch 459 are both electrically connected to the motor 451.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (8)
1. A neural occlusion needle with resistance feedback, comprising: comprises a needle core, a needle seat, a pressure observation mechanism and an injection mechanism;
the needle core is arranged on the needle seat, an inner chamber is arranged in the needle seat in a left-right through mode, two ends of the inner chamber are respectively communicated with the needle core and the injection mechanism, and the injection mechanism is used for injecting or withdrawing liquid medicine;
the pressure observation mechanism comprises a first cylinder, a second cylinder and a U-shaped pipe pressure gauge; the first cylinder is arranged at the top of the needle seat, a first accommodating cavity is formed in the first cylinder, a liquid outlet is formed in the top of the first cylinder, a liquid inlet is formed in the bottom of the first cylinder, and the liquid inlet and the liquid outlet are both communicated with the first accommodating cavity; a liquid discharge hole communicated with the inner chamber is arranged on the needle seat and communicated with the liquid inlet;
the second cylinder is arranged in the first accommodating chamber, a gap is formed between the second cylinder and the bottom wall of the first accommodating chamber, and a second accommodating chamber is formed in the second cylinder; the elastic plugging mechanism is movably matched in the second accommodating cavity along the height direction, and one end of the elastic plugging mechanism penetrates through the bottom of the second accommodating cavity and then is matched with the liquid inlet;
the U-shaped pipe pressure gauge is arranged on the first cylinder, and one end of the U-shaped pipe pressure gauge is communicated with the liquid outlet;
the needle seat is provided with a bracket, two sides of the first cylinder are provided with support lugs, the two support lugs are respectively and rotationally matched on the bracket, and the rotation axis of the first cylinder is vertical to the central axis of the needle core; the bottom of the first cylinder is provided with a balancing weight;
the liquid discharge hole is connected with the liquid inlet through a connecting hose.
2. The nerve block needle of claim 1, wherein: the elastic plugging mechanism comprises a baffle plate, a connecting rod, a plug and an elastic piece;
the baffle, the connecting rod and the plug are sequentially connected from top to bottom, the baffle is movably matched in the second accommodating chamber along the height direction, and the connecting rod penetrates through the bottom of the second accommodating chamber in a sealing and sliding manner; the plug is used for plugging the liquid inlet;
the elastic piece is arranged above the baffle, and two ends of the elastic piece respectively abut against the top wall of the second accommodating chamber and the baffle.
3. The nerve block needle of claim 2, wherein: the edge of the liquid inlet close to one end of the plug is provided with a chamfer, and the outline of the plug is provided with a conical surface matched with the chamfer.
4. The nerve block needle of claim 2, wherein: the top of the second cylinder is connected with the top wall of the first cylinder through a connecting column; the screw hole sequentially penetrates through the top of the first cylinder, the connecting column and the top of the second cylinder from top to bottom and is communicated with the second accommodating chamber;
the adjusting mechanism comprises a pressing plate, a screw rod and a guide rod, the pressing plate is vertically and movably matched in the second accommodating cavity, and the pressing plate is positioned above the elastic piece; the screw is in threaded fit in the screw hole, one end of the screw is rotatably connected with the pressure plate, and the other end of the screw extends out of the first cylinder;
the guide rod is vertically arranged on the top wall of the second accommodating cavity, a guide hole in sliding fit with the guide rod is formed in the pressing plate, and the guide rod is sleeved in the guide hole in a penetrating mode.
5. The nerve block needle according to any one of claims 1 to 4, wherein: the injection mechanism comprises an injector, a push-pull plate, a pressure sensor, a pressure alarm device and a constant-speed driving assembly;
the injector comprises a tube body, a piston and a push rod, wherein the tube body is fixed on the base and is connected with the inner chamber through a liquid inlet hose; the piston is movably matched in the tube body, and one end of the push rod is connected with the piston;
the constant-speed driving assembly is arranged on the base, the push-pull plate is connected to the constant-speed driving assembly, one end of the push rod, far away from the piston, is connected to the push-pull plate, and the constant-speed driving assembly is used for driving the push-pull plate to move at a constant speed along the central axis direction of the pipe body; the pressure sensor is arranged between the push rod and the push-pull plate and connected with the pressure alarm device, and the pressure alarm device is arranged on the base.
6. The nerve block needle of claim 5, wherein: the constant-speed driving assembly comprises a motor, a screw rod, a nut, two supports and two sliding rods;
the two supports are arranged on the base at intervals, two ends of the screw rod rotate on the two supports respectively, and one end of the screw rod penetrates through the support on the corresponding side and is connected with a first gear; the nut is in threaded fit with the screw rod and is fixed on the push plate;
the motor is arranged on a support close to the first gear, a rotating shaft of the motor penetrates through the support and then is connected with a second gear, the second gear is in meshing transmission with the first gear, and the diameter of the first gear is larger than that of the second gear;
the two sliding rods are arranged on two sides of the screw rod in parallel, and the two sliding rods are sleeved on the push plate in a penetrating mode.
7. The nerve block needle of claim 5, wherein: the pressure alarm device comprises a signal amplifier, an A/D converter, a processor and an alarm; the pressure sensor is connected with the signal amplifier, the signal amplifier is connected with the A/D converter, the A/D converter is connected with the processor, and the processor is connected with the alarm.
8. The nerve block needle of claim 6, wherein: the forward rotation switch and the reverse rotation switch of the motor are both arranged on the needle base.
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| CN202010916261.3A CN111991062B (en) | 2020-09-03 | 2020-09-03 | Nerve blocking needle with resistance feedback |
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| CN202010916261.3A CN111991062B (en) | 2020-09-03 | 2020-09-03 | Nerve blocking needle with resistance feedback |
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| CN202974549U (en) * | 2012-11-22 | 2013-06-05 | 中航力源液压股份有限公司 | Online pressure detection device |
| CN205715032U (en) * | 2016-06-20 | 2016-11-23 | 象山融合流体技术有限公司 | A kind of tubular type hydraulic valve |
| KR102649586B1 (en) * | 2017-05-04 | 2024-03-22 | 마일스톤 사이언티픽 인코포레이티드 | Method and device for performing peripheral nerve block |
| CN108398257A (en) * | 2018-04-23 | 2018-08-14 | 黄葆华 | The dry envelope valve of disposable thoracic duction instrument closes performance test apparatus |
| CN211094973U (en) * | 2019-08-12 | 2020-07-28 | 云南中医药大学 | Physiological saline injection device for establishing rabbit brain thrombus by thrombus embolization method |
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