CN210697745U

CN210697745U - Safety open-circuit cone

Info

Publication number: CN210697745U
Application number: CN201920227191.3U
Authority: CN
Inventors: 雷伟; 崔赓; 李启东
Original assignee: Fourth Military Medical University FMMU
Current assignee: Fourth Military Medical University FMMU
Priority date: 2018-11-19
Filing date: 2019-02-21
Publication date: 2020-06-09
Anticipated expiration: 2029-02-21

Abstract

The utility model discloses a safe open-circuit cone, which comprises a handle and a cone body arranged at the front end of the handle, wherein a detection device which is movably contacted with a contact object to feed back contact pressure is arranged in the cone body, and the front end of the detection device extends out of the front end part of the cone body; the handle is internally provided with a detection device for detecting the contact pressure and an acousto-optic reminding device for reminding according to the change of the contact pressure. The utility model discloses utilize detecting device, detection device and reputation reminding device to cooperate, at preparation screw nail way in-process, if the contact pressure value changes suddenly, then remind the doctor through the reputation, reach and avoid drilling too deeply to make the conical head pass the neural risk of bone injury patient, ensured the security of operation effectively.

Description

Safety open-circuit cone

Technical Field

The utility model belongs to the technical field of medical instrument, during concretely relates to during set screw among clinical medicine bone surgery, preparation screw nail way safety open a way awl of usefulness.

Background

When treating vertebral fractures in clinical medical procedures, it is often necessary to fix the fractured bones with screws, which requires the preparation of screw tunnels. At present, the screw nail path is prepared by an open cone in clinic. The existing open-circuit cone is conical and gradually becomes thinner from top to bottom, the cone is made of hard steel strips and steel with low flexibility as raw materials, the hardness is higher, and the front end of the cone is a flat cone head part. In the operation, a doctor holds the handle part of the open-circuit awl, inserts the awl into a bone needing to be provided with a nail channel, and uses manpower to push the open-circuit awl to drill forwards to a required depth.

However, the above drilling method has a fatal drawback that: the whole open-circuit cone is made of metal with high hardness, and no feedback is provided for the hardness condition of a drilled object, so that a doctor can distinguish the drilling depth only by virtue of own experience.

Disclosure of Invention

The utility model aims at providing a to the problem that causes medical accident easily that the awl exists of opening a way now, provide the safe awl of opening a way of feedback formula, remind the doctor when drilling position pressure rapid change to reduce the awl of opening a way and harm the nervous risk of patient in the use.

In order to realize the task, the utility model discloses a following technical scheme:

a safe open circuit cone comprises a handle and a cone body arranged at the front end of the handle, wherein a detection device used for movably contacting with a contact object to feed back contact pressure is arranged in the cone body, and the front end of the detection device extends out of the front end part of the cone body;

the handle is internally provided with a detection device for detecting the contact pressure and an acousto-optic reminding device for reminding according to the change of the contact pressure.

Furthermore, a hole passage penetrating through the front end part of the cone is formed in the cone, the detection device comprises a probe movably inserted in the hole passage, the front end of the probe extends out of the front end part of the cone, and the rear end of the probe is connected with the detection device.

Furthermore, the detection device comprises a pressure deformation module, a resistance strain gauge adhered to the pressure deformation module, and a PCB electrically connected with the resistance strain gauge, and the sound and light reminding device is connected to the PCB.

Further, the cone pass through connecting device and install at the handle front end, connecting device include snap ring and cone seat, be provided with second cone hole along the axial on the snap ring, be provided with third cone hole along the axial in the cone seat, the rear end of cone pass second cone hole and detachably cartridge on third cone hole, the rear end cartridge of cone seat be fixed in the handle on, with connecting device and handle fixed continuous.

Furthermore, a spring plate hole is formed in the side face, located on the second cone hole, of the clamping ring, and a pressing block hole which penetrates through the second cone hole and is communicated with the spring plate hole is formed in the outer wall of the clamping ring along the radial direction; the elastic sheet hole is internally provided with an elastic sheet, the pressing block hole is internally provided with a pressing block, one end of the pressing block is positioned outside the clamping ring, and the other end of the pressing block penetrates through the second cone hole and is connected with the elastic sheet;

the first cone hole is formed in the pressing block along the radial direction, the elastic sheet deforms after the pressing block is pressed down, the first cone hole is communicated with the second cone hole, and the cone sequentially penetrates through the first cone hole and the second cone hole.

Furthermore, the handle is of a split type hollow structure and comprises a front cover and a rear cover fixedly connected with the front cover, wherein a fixing hole communicated with the interior of the front cover is formed in the front end face of the front cover, the front cover and the rear cover are detachably connected through thread fit, a sealing ring is arranged at the joint, and the detection device and the acousto-optic reminding device are sealed in the handle;

the front cover is of a transparent structure.

Further, a disc-shaped pressure transmission steel sheet is fixed at the front end of the pressure deformation module, and the diameter of the pressure deformation steel sheet is larger than that of the fixing hole.

Further, a power supply used for supplying power to the detection device and the acousto-optic reminding device is arranged in the handle, the power supply comprises a battery seat fixed in the handle, and a battery is arranged on the battery seat.

Furthermore, a self-locking switch is mounted at the rear end of the handle, an indicator light is arranged on the self-locking switch, and when the self-locking switch is pressed down, the self-locking switch is in contact with the battery, and the indicator light is turned on; when the self-locking switch is pressed down again, the self-locking switch is separated from the battery, and the indicator light is turned off.

Furthermore, the sound and light reminding device comprises a buzzer and an LED lamp.

Compared with the prior art, the utility model has the following technical characteristics:

the utility model provides a safe open road awl, the awl head through opening a way the awl sets up the probe, and be connected the probe with the pressure deformation module of rear end, the pressure deformation module warp the resistance that makes resistance strain gauge changes, the circuit of rear end detects the resistance change and judges the current hardness condition at the contact site of probe of front end according to the information of prestoring, control reputation reminding device promptly and send acousto-optic warning when judging that probe contact site hardness reduces sharply, operating personnel stops continuation drilling according to this acousto-optic warning promptly, it is too deep to reach to prevent opening a way awl drilling, the awl head passes the neural risk of bone damage patient, the security of operation has effectively been ensured.

Drawings

FIG. 1 is a view of the assembly structure of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1;

FIG. 3 is a cross-sectional view of the present invention;

fig. 4 is one of the exploded views of the present invention;

fig. 5 is a second exploded view of the present invention.

The reference numbers in the figures illustrate: 1 cone, 2 probes, 3 pressing blocks, 31 first cone hole, 4 clamping rings, 41 second cone holes, 42 elastic sheet holes, 43 elastic sheets, 44 pressing block holes, 5 cone seats, 51 third cone holes, 52 bosses, 6 front covers, 61 fixing holes, 7 pressure deformation modules, 71 resistance strain gauges, 72 pressure transmission steel sheets, 8 fixing seats, 81PCB (printed circuit board), 82LED (light-emitting diode) lamps, 83 buzzers, 9 sealing rings, 91 metal steel rings, 10 rear covers, 101 battery seats, 102 batteries, 103 self-locking switches and 104 indicator lamps.

Detailed Description

The utility model discloses a safe open-circuit cone, which comprises a handle and a cone 1 arranged at the front end of the handle, wherein a detection device which is movably contacted with a contact object to feed back contact pressure is arranged in the cone 1, and the front end of the detection device extends out of the front end part of the cone 1;

As shown in fig. 1 to 5, the utility model discloses a safe awl of opening a way, its major structure includes cone 1 and handle, and cone 1 installs the front end at the handle, and cone 1 is whole to be cylindric component, and cone 1 middle part reduces to being close to anterior direction diameter gradually, and cone 1 front portion is flat column structure, and cone 1's preceding terminal surface is the circular arc type structure. In the scheme, the detection device is arranged in the cone 1 and is used for feeding back contact pressure of a contact object in the process of preparing the screw path of the cone 1. The contact object refers to human tissues, such as bones, nerves and the like, contacted with the front end of the detection device in the process of preparing the nail path of the cone 1. Because the front end of the detection device extends out of the front end part of the cone 1, the detection device can contact a deeper part of the nail path before the cone 1 when the nail path is prepared.

When the detecting device is contacted with the contact object, contact pressure is generated at the contact part. Since the detecting device is not telescopic in the axial direction and is a rigid structure, the contact pressure is fed back to the movement of the detecting device along the axial direction. During the process of establishing the staple path, the detecting device contacts with a contact object, if the contact object density is low, for example, when the contact object contacts with nerves or tissues, the contact pressure is low, and the displacement of the detecting device along the axial direction is small; if the bone is contacted, the contact pressure is higher, and the displacement of the detection device along the axial direction is larger. The hardness of the contact object can be judged according to different moving distances of the detection device along the axial direction.

The utility model discloses an operating principle is, when setting up the nail way, holds the handle and exert force forward, utilizes the more detection device who leans on preceding tip position to carry out contact pressure's feedback, then passes through detection device measure contact pressure. For example, holes are drilled in the bone, and the hardness of the bone is certain, so that the change of the contact pressure is kept within a small range, and the acousto-optic reminding device does not work; when the position of drilling just penetrated the bone, detection device contacted other human tissues, will lead to contact pressure to diminish suddenly, carries out reputation through reputation reminding device and reminds this moment, and the doctor stops drilling through reminding the back to avoid haring neural.

The detection device converts the contact pressure into an electric signal and provides the electric signal for the sound-light reminding device. During drilling, in the interval T, if the change delta P of the contact pressure is larger than the set threshold value P₀The touch pressure is suddenly changed, and when the detection device detects the change, the sound and light reminding device carries out sound and light reminding. The threshold value P₀The change delta P of the contact pressure can be measured and determined by measuring the contact pressure of the bone, the interval time T is a fixed value, and the smaller the value of T is, the higher the sensitivity is.

The utility model discloses in, detecting device can have multiple structure, as long as can satisfy it and can follow 1 axial displacement of cone to be rigid structure at once. For example, the detection device may be a rod-like structure, a sheet-like structure, a cylindrical structure, or the like. The detection device is a device for converting displacement into an electric signal, and the sound and light reminding device can be, for example, a buzzer 83, an LED lamp 82 and the like.

As a further optimization of the above technical solution, in this embodiment, a duct penetrating through the front end of the cone 1 is formed in the cone 1, the detecting device includes a probe 2 movably inserted into the duct, the front end of the probe 2 extends out of the front end of the cone 1, and the rear end of the probe 2 is connected to the detecting device.

As shown in fig. 2 and 3, the hole channel is a channel axially opened in the cone 1, the channel penetrates through the front end and the rear end of the cone 1, the front end of the probe 2 penetrates through the hole channel and protrudes out of the front end of the cone 1, the rear end of the probe 2 penetrates through the rear end of the cone 1 to be connected with the detection device, and the probe 2 can move axially in the hole channel. The probe 2 is made of rigid material, such as medical stainless steel or medical corrosion-resistant alloy material. As shown in fig. 2, the front end of the probe 2 is processed into a spherical structure to avoid damage to human tissue.

As shown in fig. 4 and 5, in the present embodiment, the detecting device includes a pressure deformation module 7, a resistance strain gauge 71 adhered to the pressure deformation module 7, and a PCB 81 electrically connected to the resistance strain gauge 71, and the sound and light reminding device is connected to the PCB 81. Wherein the pressure deformation module 7 is a module which can be deformed under the action of pressure, such as a rubber block; the resistance strain gauge 71 is used for detecting the deformation of the pressure deformation module 7, converting the deformation into the change of the resistance, and finally outputting an electric signal. When the probe 2 moves, the rear end of the probe 2 deforms the pressure deformation module 7, and the deformation is different according to the difference of the pressure, so that the finally output electric signals are different; the PCB 81 is used for judging the size of the contact pressure according to the size of the electric signal and determining whether to remind through an acousto-optic reminding device according to the change of the contact pressure value.

In order to facilitate the installation of the detection device, a fixed seat 8 is clamped and fixed in the handle, the fixed seat 8 is two circular cavities which are axially connected in a large mode and a small mode, the pressure deformation module 7 and the resistance strain gauge 71 are located in the smaller cavity, and the PCB 81 is located in the larger cavity; the middle of the PCB 81 is perforated and screws are passed through the holes to secure the PCB 81 in the larger cavity.

As shown in fig. 3 to 5, in the present scheme, the cone 1 is mounted at the front end of the handle through a connecting device, the connecting device includes a snap ring 4 and a cone seat 5, and the snap ring 4 and the cone seat 5 are both cylindrical structures; a second cone hole 41 is axially arranged on the snap ring 4, a third cone hole 51 is axially arranged in the cone seat 5, the rear end of the cone 1 passes through the second cone hole 41 and is detachably inserted in the third cone hole 51, the rear end of the cone 1 is processed into a flat structure, and the third cone hole 51 is also a flat hole; the rear end of the cone seat 5 is inserted and fixed on the handle, and the connecting device is fixedly connected with the handle; specifically, the rear end of the cone seat 5 is provided with a cylindrical boss 52, the third cone hole 51 also penetrates through the boss 52, and the boss 52 is connected with the handle in a plug-in mode.

As shown in fig. 4 and 5, the handle is a split hollow structure and comprises a front cover 6 and a rear cover 10 fixedly connected with the front cover 6; in this embodiment, the front cover 6 and the rear cover 10 are both hollow frustum structures, wherein a fixing hole 61 communicated with the inside of the front cover 6 is formed in the front end surface of the front cover 6, and the boss 52 at the rear end of the cone seat 5 is inserted and fixed in the fixing hole 61 in an interference fit manner; since the cone base 5 is provided with the third cone hole 51, the rear end of the probe 2 will pass through the fixing hole 61 and enter the front cover 6 to connect with the detecting device.

The front cover 6 and the rear cover 10 are detachably connected in a threaded fit manner, a sealing ring 9 is arranged at the joint, and the detection device and the sound and light reminding device are sealed in the handle; because the acousto-optic reminding device is positioned in the handle, the front cover 6 is of a transparent structure so as to be convenient for a doctor to see an optical signal; when the LED lamp 82 in the acousto-optic reminding device is lightened, the doctor can see the light signal through the LED lamp.

In this scheme, cone 1, probe 2 be detachable structure, specifically: a spring sheet hole 42 is formed in the side face, located on the second cone hole 41, of the clamping ring 4, and a pressing block hole 44 which penetrates through the second cone hole 41 and is communicated with the spring sheet hole 42 is formed in the outer wall of the clamping ring 4 in the radial direction; the elastic sheet 43 is arranged in the elastic sheet hole 42, the pressing block 3 is arranged in the pressing block hole 44, one end of the pressing block 3 is positioned outside the clamping ring 4, and the other end of the pressing block 3 penetrates through the second cone hole 41 and is connected with the elastic sheet 43; the first cone hole 31 is radially formed in the pressing block 3, when the pressing block 3 is pressed down, the elastic sheet 43 deforms, the first cone hole 31 is communicated with the second cone hole 41, and the cone 1 sequentially penetrates through the first cone hole 31 and the second cone hole 41.

Under the condition of normal use, due to the elastic force provided by the elastic sheet 43, the first cone hole 31 and the second cone hole 41 are dislocated, and further, a large axial friction force is generated between the cone 1 and the first cone hole 31 and the second cone hole 41, so as to limit the position of the cone 1. When the cone 1 needs to be pulled out, the pressing block 3 is pressed down to enable the first cone hole 31 and the second cone hole 41 to be coaxial or nearly coaxial, and then the cone 1 is pulled out.

Further, a disk-shaped pressure transmission steel sheet 72 is fixed to the front end of the pressure deformation module 7, and the diameter of the pressure deformation steel sheet is larger than that of the fixing hole 61. Specifically, the pressure transmitting steel piece 72 is located inside the front cover 6 of the handle, and cannot pass through the fixing hole 61 because its diameter is larger than that of the fixing hole 61 of the front cover 6. Correspondingly, the back end of the probe 2 is provided with a disc-shaped top plate, and after the back end of the probe 2 passes through the fixing hole 61, the top plate is contacted with the pressure transmission steel sheet 72; when the probe 2 is displaced axially, the top sheet transmits a force to the pressure deformation block 7 through the pressure transmission steel sheet 72, so that the pressure deformation block 7 is deformed.

In the scheme, a power supply for supplying power to the detection device and the acousto-optic reminding device is arranged in the handle, the power supply comprises a battery seat 101 fixed in the handle, and a battery 102 is arranged on the battery seat 101; the battery 102 is a button battery 102 and is detachably mounted on the battery holder 101. The battery holder 101 is a disc-shaped structure and comprises an inner disc and an outer ring which are insulated from each other, one or more power contacts are fixed on the inner disc, one or more power contacts are fixed on the outer ring, the positive electrode and the negative electrode of the battery 102 are electrically connected to the power contacts of the inner disc and the outer ring respectively, and the power contacts of the inner disc and the outer ring are electrically connected to the PCB 81 through the metal steel ring 91.

In addition, according to the scheme, the self-locking switch 103 is arranged at the rear end of the handle, the self-locking switch 103 is provided with the indicating lamp 104, and when the self-locking switch 103 is pressed down, the indicating lamp 104 is in contact with the battery 102 and is lightened; when the self-locking switch 103 is pressed down again, the self-locking switch 103 is separated from the battery 102, and the indicator light 104 is turned off; the self-locking switch 103 is used for detecting whether the battery 102 works normally, so that the acousto-optic reminding device which is possibly caused by the problem of the battery 102 cannot work.

The utility model discloses when using, the doctor at first presses self-locking switch 103, and pilot lamp 104 lights then and shows that the awl global state of opening a way is normal, and the doctor can utilize this moment to open a way the awl and prepare the operation of screw nail way, and probe 2 is located cone 1 foremost, therefore it can direct contact to the contact that the awl of opening a way bored, differentiatees out the hardness condition of contact. When the awl of opening a way is about to bore through whole bone, the contact object pressure of the 2 contact of probe of front end reduces suddenly, probe 2 also reduces pressure transmission steel sheet 72, the deformation of pressure deformation module 7 diminishes, make resistance strain gauge 71 produce the signal of telecommunication that changes, this signal of telecommunication is to PCB board 81, PCB board 81 judges that the pressure value is greater than the threshold value, then drive buzzer 83 sends the sound of warning, and LED lamp 82 sends warning signal, the doctor can stop to continue drilling immediately according to this reputation warning, thereby reach and prevent to drill deeply, the cone 1 front end passes the neural risk of bone injury patient, the security of operation has been ensured powerfully. After use, the self-locking switch 103 is pressed again, and the indicator light 104 is turned off.

After the patient finishes using the device, the pressing block 3 is pressed down, the cone 1 is pulled out from the cone seat 5, the probe 2 is pulled out from the cone 1, the rear cover 10 is unscrewed, and the battery seat 101 and the battery 102 are removed. Due to the adoption of a detachable structure, the cone 1, the probe 2, the pressing block 3, the clamping ring 4, the cone seat 5 and the front cover 6 can be directly placed into a high-temperature disinfection furnace to be subjected to high-temperature disinfection treatment such as boiling, smoking and baking, so that iatrogenic cross infection among different patients is prevented.

Claims

1. A safe open circuit cone comprises a handle and a cone body (1) arranged at the front end of the handle, and is characterized in that a detection device which is used for movably contacting with a contact object to feed back contact pressure is arranged in the cone body (1), and the front end of the detection device extends out of the front end part of the cone body (1);

2. The safe open-circuit cone according to claim 1, wherein the cone (1) is provided with a duct penetrating through the front end of the cone (1), the detecting device comprises a probe (2) movably inserted into the duct, the front end of the probe (2) extends out of the front end of the cone (1), and the rear end of the probe (2) is connected with the detecting device.

3. The safety open-circuit cone as claimed in claim 1, wherein the detecting device comprises a pressure deformation module (7), a resistance strain gauge (71) adhered on the pressure deformation module (7), and a PCB (81) electrically connected to the resistance strain gauge (71), and the sound and light reminding device is connected to the PCB (81).

4. The safety open-circuit cone as claimed in claim 1, wherein the cone (1) is mounted at the front end of the handle through a connecting device, the connecting device comprises a snap ring (4) and a cone seat (5), a second cone hole (41) is axially arranged on the snap ring (4), a third cone hole (51) is axially arranged in the cone seat (5), the rear end of the cone (1) passes through the second cone hole (41) and is detachably inserted in the third cone hole (51), and the rear end of the cone seat (5) is inserted and fixed on the handle to fixedly connect the connecting device and the handle.

5. The safety open-circuit cone as claimed in claim 4, characterized in that a spring plate hole (42) is formed on the side of the second cone hole (41) on the snap ring (4), and a pressing block hole (44) which penetrates through the second cone hole (41) and is communicated with the spring plate hole (42) is radially formed on the outer wall of the snap ring (4); an elastic sheet (43) is arranged in the elastic sheet hole (42), a pressing block (3) is assembled in the pressing block hole (44), one end of the pressing block (3) is positioned outside the clamping ring (4), and the other end of the pressing block penetrates through the second cone hole (41) and is connected with the elastic sheet (43);

the pressing block (3) is provided with a first cone hole (31) along the radial direction, when the pressing block (3) is pressed down, the elastic sheet (43) deforms, the first cone hole (31) and the second cone hole (41) are communicated, and the cone (1) sequentially penetrates through the first cone hole (31) and the second cone hole (41).

6. The safety open-circuit cone as claimed in claim 3, characterized in that the handle is of a split hollow structure, and comprises a front cover (6) and a rear cover (10) fixedly connected with the front cover (6), wherein a fixing hole (61) communicated with the interior of the front cover (6) is formed in the front end surface of the front cover (6), the front cover (6) and the rear cover (10) are detachably connected through thread fit, a sealing ring (9) is arranged at the joint, and the detecting device and the acousto-optic reminding device are sealed in the handle;

the front cover (6) is of a transparent structure.

7. The safety open-circuit cone according to claim 6, wherein the front end of the pressure deformation module (7) is fixed with a disc-shaped pressure transmission steel sheet (72) having a diameter larger than that of the fixing hole (61).

8. The safety open-circuit cone as claimed in claim 1, wherein a power supply is provided in the handle for supplying power to the detecting means and the acousto-optic warning device, the power supply comprises a battery holder (101) fixed in the handle, and a battery (102) is provided on the battery holder (101).

9. The safety open-circuit cone as claimed in claim 8, characterized in that the rear end of the handle is provided with a self-locking switch (103), the self-locking switch (103) is provided with an indicator light (104), when the self-locking switch (103) is pressed down, the indicator light (104) is turned on; when the self-locking switch (103) is pressed down again, the self-locking switch (103) is separated from the battery (102) and the indicator light (104) is turned off.

10. The safety open-circuit cone as claimed in claim 1, wherein the sound and light reminding device comprises a buzzer (83) and an LED lamp (82).