CN201079421Y - Pedicle of vertebral arch screw cone capable of early warning - Google Patents
Pedicle of vertebral arch screw cone capable of early warning Download PDFInfo
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- CN201079421Y CN201079421Y CNU2007200079856U CN200720007985U CN201079421Y CN 201079421 Y CN201079421 Y CN 201079421Y CN U2007200079856 U CNU2007200079856 U CN U2007200079856U CN 200720007985 U CN200720007985 U CN 200720007985U CN 201079421 Y CN201079421 Y CN 201079421Y
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Abstract
The utility model provides an early-warning vertebra bow base screw wimble, which relates to a surgery device. The utility model aims to solve the problems that the screw wimble wrongly enters into the vertebra tube of the patient or wrongly penetrates through the vertebra of the patient, and hurts the important nerves or blood vessel. The screw wimble is characterized in that a screw rod with a wedgy head is arranged on the front end of a wimble body; a hollow space is arranged in the wimble body, a pressure convertor and a prompter are fixedly arranged in the space; the tail part of the screw rod extends into the space, the pressure sensing end face of the pressure convertor is in axial contact with the tail part of the screw rod; the output part of the pressure convertor is connected with a prompter arranged on the tail part of the wimble body. When drilling during the vertebra bow base bolt surgery, before the screw wimble wrongly enters into the vertebra tube of the patient or wrongly penetrates through the vertebra of the patient, the pressure transmitted from the wimble rod increases and causes the output of the pressure convertor to produce a corresponding early-warning prompt on the prompter, the surgery recipient can change the incoming direction and the angle of the wimble according to the prompt.
Description
Technical field
This utility model relates to a kind of surgical apparatus, the pedicle of vertebral arch spiral shell awl that uses when particularly the spinal operation pedicle nail is implanted.
Background technology
Pedicle screw fixation is the most frequently used technology of spinal surgery, and accurately inserting screw is the operation key of success.Pedicle screw is inserted technology and is popularized at various big hospital, and domestic and international existing pedicle screw is inserted technology and mainly contained: 1, bone mark positioning mode, promptly free-hand operating technology; Insert in the vertebral body process at screw, by any other special equipment, this method does not have certain blindness, rely on fully the patient experience and feel to operate.2, the auxiliary perspective technology of X line; Before pedicle nail is inserted, in pedicle of vertebral arch, insert earlier a significant metal object, carry out the photography of X line with C shape arm or G shape arm then, determine to insert the position of thing by two-dimensional imaging.This method is commonly used at home, but these equipment volume are big, moves inconveniently, and patient and patient will be subjected to repeatedly roentgenization in the operation process, and the X line imaging only has bidimensionality, has certain limitation.3, image-guidance technology; It is the emerging operation method of spinal operation in recent years, the spinal operation navigation system is to obtain the local X line of spinal column, CT, MRI before the art, utilize digital image to reconstruct patient's threedimensional model image, operative doctor can be operated spinal surgery software and carry out planning before the art on this image basis, and can simulate process, actual pedicle nail is inserted the current location of the relative patient's anatomical structure of system's infrared pick-up head dynamic tracing operating theater instruments in the process, and clearly is presented on patient's the two dimension or 3-dimensional image data.This technology can only provide region of interest two dimensional navigation image, and complicated operation is loaded down with trivial details, and the cycle is long, and cost is high, is not suitable for the national conditions of China, uses not extensive now.
The pedicle of vertebral arch spiral shell awl that uses during pedicle of vertebral arch system internal fixation operation has the cone that grips for the doctor, and cone front end fixing head is the screw rod of wedge shape.In the process of before pedicle screw is inserted, holing, because the people has individual variation, vertebral body sclerotin hardness is also inequality, especially osteoporotic patient, the screw head of pedicle of vertebral arch spiral shell awl very easily penetrates the patient vertebral body, and damage vertebral body front or lateral important neural blood vessel, even be strayed into Spinal Cord in the canalis spinalis, cause paraplegia; Even deviation also appears in surgical technic superb and veteran doctor unavoidably.Because the limitation of the complexity of anatomy of spine and two dimensional image (referring to use CT or the back imaging of X line perspective in the operation process), the misplace rate of screw it is reported up to 20-30%.In addition, also need by C shape arm in the art, G shape arm and spiral CT scan the location, determine the position that pedicle screw is inserted, these equipment not only volume are big, move difficulty, cost is high, and patient body position's conversion is frequent in the use, prolonged operating time, increase the infection probability, and repeatedly behind the x radiation x, patient and medical personnel's health have been caused very macrolesion.
The utility model content
This utility model aims to provide and a kind ofly can send early warning automatically before spiral shell awl is strayed into patient's canalis spinalis or penetrates vertebral body, but avoids damaging the pedicle of vertebral arch spiral shell awl of the early warning of important nerve or blood vessel.
The technical solution of the utility model is: but the pedicle of vertebral arch spiral shell of early warning awl, and the setting of cone front end has the screw rod of wedge shape head; Establish the space of hollow in the cone, fixed installation pressure converter and prompting apparatus in this space; The afterbody of screw rod stretches in this space, and the pressure-sensitive end face of pressure converter axially contacts with the afterbody of screw rod; The efferent of pressure converter is connected with the prompting apparatus that is positioned at the cone afterbody.Pressure increase from the transmission of awl bar in operation makes the output of pressure converter produce corresponding early warning at prompting apparatus, and the patient can advance to bore direction and angle according to this prompting change.
A kind of enforcement structure is: described cone front end is established the axial jack of grafting screw rod tail, and this jack has draw-in groove; The side surface of screw rod tail is provided with the wing projection, and the afterbody of screw rod and wing projection thereof become to be slidingly matched with the jack and the draw-in groove thereof of cone front end.When screw head was stressed, the afterbody of screw rod can be slightly slides to the pressure-sensitive end face of piezoelectric sender, offset to the pressure-sensitive end face of piezoelectric sender the distortion after stressed; The counteracting force of screw rod can affact the pressure-sensitive end face of piezoelectric sender all the time in keeping performing the operation.
Particularly: the axial end of described screw rod tail is the semicircle sphere.The afterbody of screw rod forms safe point with the pressure-sensitive end face of piezoelectric sender and contacts.
The wedge shape splitter place of described screw head is flat or flat arcuation.Make screw rod have the effect of holing preferably.
A kind of embodiment is the processing method that adopts electronics: described pressure converter is a piezoelectric sender, and prompting apparatus is the alarm with alarm threshold value governor motion; The pressure-sensitive end face of piezoelectric sender axially contacts with the afterbody of screw rod; The output lead of piezoelectric sender becomes to be electrically connected with alarm; The alarm threshold value governor motion of alarm is located at the surface of cone.When the pressure of awl bar transmission made the electric energy of piezoelectric sender output surpass alarm threshold value governor motion preset threshold, the electric energy of piezoelectric sender output made alarm send the early warning alarm at once, and the prompting patient changes into awl direction and angle.
Described alarm is an audible-visual annunciator.Siren can send light warning and audible alarm simultaneously, and tangible early warning effect is arranged.
Another kind of embodiment is the processing method that adopts machinery: described pressure converter comprises pressure/shift transformation mechanism and displacement/rotational mapping device, and prompting apparatus is the dial gauge with pointer shaft; The pressure-sensitive end face of pressure converter is located at the front end of pressure/shift transformation mechanism, and the displacement efferent of pressure/shift transformation mechanism connects the displacement input part of displacement/rotational mapping device; The rotation efferent of displacement/rotational mapping device connects the pointer shaft of dial gauge.When in the pedicle screw operation, holing, the spiral shell awl is strayed into canalis spinalis or penetrates before the vertebral body, make the pressure/shift transformation mechanism of pressure converter produce displacement output from the pressure increase of awl bar transmission, this displacement output makes the output that rotates of displacement/rotational mapping device, this rotation output makes the throw of pointer of dial gauge, and the prompting patient changes into awl direction and angle
In preferred embodiment: described pressure/shift transformation mechanism has housing, baffle plate, spring and the baffle plate connecting rod of tubular; Baffle plate is that the pressure-sensitive end face of pressure converter is located in the opening of housing front end; Spring is located in the housing and the bottom of contact baffle plate and housing respectively, two ends; The front end of baffle plate connecting rod is fixed on the baffle plate, and the rear end of baffle plate connecting rod is the displacement input part that the displacement efferent of pressure/shift transformation mechanism passes the via hole connection displacement/rotational mapping device of housing bottom.Utilize the deformation force of spring, with pressure be converted to along cone axis to displacement; Simple in structure, be easy to realize.
In preferred embodiment: described displacement/rotational mapping device has housing, tooth bar, Knucle-gear and a pair of intermeshing conical gear of tubular; Tooth bar is that the displacement input part of displacement/rotational mapping device is located in the opening of housing front end and connects the baffle plate connecting rod of pressure/shift transformation mechanism; Knucle-gear and a conical gear are co-axially mounted in the opening of housing front end, the engagement of knuckle-tooth wheel and rack; The rotating shaft of another conical gear is the pointer shaft that the rotation efferent of displacement/rotational mapping device connects dial gauge.Utilize the combination of tooth bar and Knucle-gear, will along cone axis to displacement be converted to along the radial rotation of cone, utilize again a pair of intermeshing conical gear will along the radial rotation of cone be converted to along cone axis to rotation, the pointer of the dial gauge of cone afterbody is rotated, point out the variation of pressure intuitively.
But the pedicle of vertebral arch spiral shell of this utility model early warning awl is established the fixed in space setting pressure changer and the prompting apparatus of hollow in cone; The afterbody of screw rod stretches in this space and contacts with the pressure-sensitive end face axial of pressure converter; The efferent of pressure converter is connected with the prompting apparatus that is positioned at the cone afterbody.When holing in the pedicle screw operation, the spiral shell awl is strayed into canalis spinalis or penetrates before the vertebral body, makes the output of pressure converter produce corresponding early warning at prompting apparatus from the pressure increase of boring the bar transmission, and the patient can change according to this prompting advance to bore direction and angle.This utility model has overcome the blindness of original operation method, has solved the difficult problem that dynamics is difficult to grasp when holing before pedicle screw is inserted preferably, can obviously improve success rate of operation.And shortened operating time, avoided also that patient and medical personnel accept too much roentgen radiation x in the operation, had advantages such as practical, simple to operate, conveniently moving.
Description of drawings
But Fig. 1 is the cross-sectional view of an embodiment of pedicle of vertebral arch spiral shell awl of this utility model early warning.
Fig. 2 is the perspective view of screw rod among Fig. 1 embodiment.
Fig. 3 is the cross-sectional view of cone among Fig. 1 embodiment.
Fig. 4 is the perspective view of Fig. 1 embodiment.
But Fig. 5 bores the cross-sectional view of another embodiment for the pedicle of vertebral arch spiral shell of this utility model early warning.
But Fig. 6 bores the cross-sectional view of another embodiment for the pedicle of vertebral arch spiral shell of this utility model early warning.
The specific embodiment
One, embodiment one
But the structure of an embodiment of the pedicle of vertebral arch spiral shell of this utility model early warning awl, as shown in Figure 1.But the pedicle of vertebral arch spiral shell awl that is somebody's turn to do early warning is made up of screw rod 1, cone 2, piezoelectric sender 3, alarm 4 and bonnet 5.
The structure of screw rod 1 please see Figure 2.Columniform screw rod 1, its head 11 is wedge shape.For making screw rod 1 have the effect of holing preferably, flat or flat arcuation are made by the head 11 wedge shape splitter places of screw rod 1.Afterbody 12 enlarged diameter of screw rod 1, afterbody 12 side surfaces of screw rod 1 are provided with a pair of radially relative wing projection 13, and afterbody 12 axial ends 14 of screw rod 1 are the semicircle sphere.
The structure of cone 2 please see Figure 3.Columniform cone 2, anterior inwardly contracing left the axial jack 20 of a grafting screw rod 1 afterbody 12 backward along axis from front end face, and jack 20 is slidingly matched for 12 one-tenth with the afterbody of screw rod 1.Have a pair of radially relative draw-in groove 21 on the inwall of this jack 20; This is slidingly matched for 13 one-tenth with screw rod 1 afterbody 12 corresponding wing projectioies to draw-in groove 21.Set out space 22 enlarged diameter, hollow from jack 20 to the tailing edge axis in the cone 2, leave a pair of radially relative draw-in groove 23 on the inwall in this space 22.The sidewall at cone 2 rear portions has a shoulder hole 24, and the microcephaly of this shoulder hole 24 is communicated with the space 22 in the cone 2.The rear end 25 in this space 22 is to the rear end open of cone 2, and in the rear end of cone 2 enlarged diameter to the bottom surface of containing two draw-in grooves 23.
Get back to Fig. 1: screw rod 1 is arranged on the front end of cone 2, the afterbody 12 of screw rod 1 is plugged in the cone 2 forward jacks 20 and stretches in cone 2 volume inside 22, and two wing projectioies 13 of screw rod 1 afterbody 12 are stuck on the inwall of jack 20 of cone 2 in the corresponding draw-in groove 21.Order is installed columniform piezoelectric sender 3 and alarm 4 in cone 2 volume inside 22.Piezoelectric sender 3 is transformed to the device of electric energy for known technology with pressure, and for ease of fixing, we are provided with a pair of radially relative wing plate 32 at its side surface.Two wing plates 32 of piezoelectric sender 3 are stuck in the draw-in groove 23 corresponding on the inwall in space 22 in the cone 2 tightly, piezoelectric sender 3 is fixed in this space 22, and the pressure-sensitive end face 31 of piezoelectric sender 3 contacts to end face 14 with the afterbody of screw rod 1 12 semi-round ball oblique crank Zs.Alarm 4 is the audible-visual annunciator of known technology, the external alarm threshold value governor motion of its body 41 43, a light emitting diode 44 and a buzzer 45; Alarm threshold value governor motion 43 adopts variable resistance usually.Two wing plates 42 of columniform alarm 4 bodies 41 are stuck in the draw-in groove 23 corresponding on the inwall in space 22 in the cone 2 tightly, and the body 41 of alarm 4 is fixed in this space 22.And two output lead terminals 34 of piezoelectric sender 3 are electrically connected closely with two input terminals formation of alarm 4.The alarm threshold value governor motion 43 of alarm 4 is located in the major part of shoulder hole 24 on cone 1 surface, and the microcephaly that the connecting line of alarm threshold value governor motion 43 passes shoulder hole 24 is connected with body 41.The light emitting diode 44 of alarm 4 light warnings and the buzzer 45 of audible alarm are fixedly mounted on the bonnet 5, and bonnet 5 is fixedly mounted in the rear end 25 in cone 2 spaces 22.The connecting line of light emitting diode 44 and buzzer 45 is connected with body 41.
Stereochemical structure after the present embodiment assembling is finished please see Figure 4.
When implementing pedicle of vertebral arch system internal fixation operation: the patient ventricumbent position is flat crouches, pad " U " shape pad under the health.Need select epidural anesthesia or general anesthesia for use according to operation, after anesthesia comes into force.With behind the opening awl opening, utilize present embodiment boring more earlier.
Before using present embodiment, set the threshold value of the alarm threshold value governor motion 43 of alarm 4 according to the patient body situation, make awl bar 1 head 11 tips in the patient vertebral body during normal position, alarm 4 can not sounded and the flash of light of light warning.
In operation, when screw head was stressed when boring at the tip of awl bar 1 head 11, the afterbody 12 of screw rod 1 can be slightly slides to the pressure-sensitive end face 31 of piezoelectric sender 3, offset to the pressure-sensitive end face of piezoelectric sender 3 31 distortion after stressed; The counteracting force of screw rod 1 can affact the pressure-sensitive end face 31 of piezoelectric sender 3 all the time in keeping performing the operation.In case the tip of awl bar 1 head 11 is strayed into patient's canalis spinalis or penetrates before the patient vertebral body, when the electric energy that the pressure that transmits from awl bar 1 is exported piezoelectric sender 3 surpasses alarm threshold value governor motion 43 preset threshold, the electric energy of piezoelectric sender 3 outputs gives the alarm alarm 4 at once, light emitting diode 44 glimmers at once and buzzer 45 sends the sound of warning at once, the prompting operator changes the angle and the degree of depth of spiral shell awl, after treating correct position, light emitting diode 44 stops to glimmer and buzzer 45 stops to send the sound of warning.After finishing boring, withdraw from the spiral shell awl of present embodiment.After the tapping, insert the pedicle screw that diameter is 6mm or 6.5mm, put connecting rod and cross bar then, after the locking.The flushing otch is sewed up subcutaneous tissue, skin successively, and operation finishes.
Two, embodiment two
But the pedicle of vertebral arch spiral shell of this utility model early warning is bored the structure of another embodiment, and as shown in Figure 5, but the pedicle of vertebral arch spiral shell of this early warning awl is made up of screw rod 6, cone 7, piezoelectric sender 8, alarm 9 and bonnet 10.
The head 61 of cylindrical screw rod 6 is wedge shape.For making screw rod 6 have the effect of holing preferably, flat or flat arcuation are made by the head 61 wedge shape splitter places of screw rod 6.
Screw rod 6 is arranged on the front end of cone 7, and the afterbody 62 of screw rod 6 is fixed in the cone 7 forward via holes and tail end stretches in cone 7 volume inside 71.Order is installed the piezoelectric sender 8 of known technology and the alarm 9 of known technology in the space 71 of cone 7.Piezoelectric sender 8 is fixed on the front portion in space 71 by the trip bolt in the cone 7 anterior sidewall screws 72.Pressure-sensitive end face 81 contacts with the axial end of screw rod 6 afterbodys 62.Alarm 9 is an audible-visual annunciator, the external light emitting diode of its body 91 92, a buzzer 93 and an alarm threshold value governor motion 94; Alarm threshold value governor motion 94 adopts variable resistance usually.The body 91 of alarm 9 is fixed on the middle part in space 71 by the trip bolt in the screw 73 of cone 7 middle part sidewalls, and two output lead terminals 82 of piezoelectric sender 8 are electrically connected closely with two input terminals formation of the body 91 of alarm 9.The alarm threshold value governor motion 94 of alarm 9 is located in the shoulder hole major part on cone 7 surfaces, and the microcephaly that the connecting line of alarm threshold value governor motion 94 passes this shoulder hole is connected with body 91.The light emitting diode 92 of alarm 9 light warnings and the buzzer 93 of audible alarm are fixedly mounted on the bonnet 10.Bonnet 10 is fixedly mounted on the rear end in cone 7 spaces 71.The connecting line of light emitting diode 92 and buzzer 93 is connected with body 91.
The using method of present embodiment is identical with last embodiment, and when the pressure that transmits from awl bar 6 made the electric energy of piezoelectric sender 8 outputs surpass alarm threshold value governor motion 94 preset threshold, the electric energy of piezoelectric sender 8 outputs gave the alarm alarm 9 at once.As space is limited so repeat no more.
Three, embodiment three
But the pedicle of vertebral arch spiral shell of this utility model early warning is bored the structure of another embodiment, as shown in Figure 6.But the pedicle of vertebral arch spiral shell awl that is somebody's turn to do early warning is made up of screw rod 100, cone 200, pressure/shift transformation mechanism 300, displacement/rotational mapping device 40 and dial gauge 500.
The structure of screw rod 100 is identical with screw rod 1 among first embodiment, can be referring to Fig. 2.Columniform screw rod 100, its head 110 are wedge shape and flat or flat arcuation are made by the splitter place.Afterbody 120 enlarged diameter of screw rod 100, afterbody 120 side surfaces of screw rod 100 are provided with a pair of radially relative wing projection 130, and afterbody 120 axial ends of screw rod 100 are the semicircle sphere.
The structure of cone 200 is identical with cone 2 among first embodiment, can be referring to Fig. 3.Columniform cone 200, anterior inwardly contracing left the axial jack 201 of a grafting screw rod 100 afterbodys 120 backward along axis from front end face, and jack 201 is slidingly matched for 120 one-tenth with the afterbody of screw rod 100.Have a pair of radially relative draw-in groove 210 on the inwall of this jack 201; This is slidingly matched for 130 one-tenth with screw rod 100 afterbodys 120 corresponding wing projectioies to draw-in groove 210.Set out space 220 enlarged diameter, hollow from jack 201 to the tailing edge axis in the cone 200, leave a pair of radially relative draw-in groove 230 on the inwall in this space 220.The rear end in this space 220 is to the rear end open of cone 200, and enlarged diameter arrives the bottom surface of containing two draw-in grooves 230 near the rear end of cone 200.
Get back to Fig. 6: screw rod 100 is arranged on the front end of cone 200, and the afterbody 120 of screw rod 100 is plugged in the cone 200 forward jacks 201 and stretches in cone 200 volume inside 220.Two wing projectioies 130 of screw rod 100 afterbodys 120 are stuck on the inwall of jack 201 of cone 200 in the corresponding draw-in groove 210.Order is installed columniform pressure/shift transformation mechanism 300, displacement/rotational mapping device 400 and dial gauge 500 in cone 200 volume inside 220.
Pressure/shift transformation mechanism 300 has the barrel-type casing of open front, and a via hole and a pilot hole are arranged at the bottom 301 of housing.The baffle plate 310 that can move in housing is located in the opening of housing front end; Spring 330 is located in the housing and the bottom 301 of contact baffle plate 310 and housing respectively, two ends.A middle part has the baffle plate connecting rod 340 of tooth bar, and the via hole that housing bottom 301 is passed in its front portion stretches in the housing, and its front end is fixed on the baffle plate 310.The via hole that guide rod 350 passes housing bottom 301 stretches in the housing, and its front end is fixed on the baffle plate 310.The case side surface is provided with a pair of radially relative wing plate 320.Two wing plates 320 of pressure/shift transformation mechanism 300 housings are stuck in the draw-in groove 230 corresponding on the inwall in space 220 in the cone 200 tightly, pressure/shift transformation mechanism 300 is fixed in this space 220, and baffle plate 310 contacts to end face with the afterbody 120 semi-round ball oblique crank Zs of screw rod 100 as the pressure-sensitive end face of pressure/shift transformation mechanism 300.
Displacement/rotational mapping device 400 comprises barrel-type casing, the tooth bar on the baffle plate connecting rod 340, Knucle-gear 420 and a pair of intermeshing conical gear 430,450 of open front.A via hole and an axis hole are arranged at the bottom 401 of housing; A rotating shaft 410 that radially is provided with is installed in the space 402 of housing open front; The bottom 401 that the sidewall of housing is crossed housing extends back, and forms a space 403 of opening wide backward.Knucle-gear 420 and conical gear 430 are installed in the interior rotating shaft 410 of preceding end spaces 402 openings of housing.The case side surface is provided with a pair of radially relative wing plate 440, and these two wing plates 440 are stuck in the draw-in groove 230 corresponding on the inwall in space 220 in the cone 200 tightly, and displacement/rotational mapping device 400 is fixed in this space 220.The pilot hole of housing bottom 401 is passed at the rear portion of baffle plate connecting rod 340, and the Knucle-gear 420 and the tooth bar at baffle plate connecting rod 340 middle parts are meshed; The axis hole connection dial gauge 500 of housing bottom 401 is passed in the rotating shaft 460 of another conical gear 450 along the axis of housing.
The body of dial gauge 500 is one and has graduated dial plate, is installed in the rear end of cone 200 inner spaces 220.There is an axis hole in the central authorities of this dial plate, and rotating shaft 460 rearward end of displacement/rotational mapping device 400 are passed this axis hole, stretch out backward; The pointer 510 of dial gauge 500 is installed in the rear end of rotating shaft 460.Dial gauge 500 also has a transparent protective cover 520, and protective cover 520 is installed in the rear end of cone 200 inner spaces 220.
In operation, when the tip of awl bar 100 heads 110 was subjected to axial resistance when boring, the afterbody 120 of screw rod 100 can slide to the baffle plate 310 of pressure/shift transformation mechanism 300, and pushing tow baffle plate 310 makes spring 330 compressions.The baffle plate connecting rod 340 of pressure/shift transformation mechanism 300 produces displacement output backward, this displacement output makes the Knucle-gear 420 of displacement/rotational mapping device 400 that baffle plate connecting rod 340 is converted to rotating shaft 410 along cone 200 radial rotations along cone 200 axial displacements, intermeshing conical gear 430,450 is converted to rotating shaft 460 along the axial rotation of cone 200 with rotating shaft 410 along cone 200 radial rotations, the direction deflection that the pointer 510 of the dial gauge 500 of cone 200 afterbodys is increased to scale value.Otherwise: when the tip of awl bar 100 heads 110 is subjected to axial resistance and reduces, the restoring force of spring 330 moves forward the baffle plate connecting rod 340 of pressure/shift transformation mechanism 300, drives the pointer 510 of dial gauge 500 to the little direction deflection of scale value by displacement/rotational mapping device 400.
In case the tip of awl bar 100 heads 110 is strayed into patient's canalis spinalis or penetrates before the patient vertebral body, the pressure that awl bar 100 transmits increases, and when making pointer 510 deflection amplitudes of dial gauge 500 surpass the scale of safety, the prompting operator changes the angle and the degree of depth of spiral shell awl.After treating correct position, the pointer 510 of dial gauge 500 is got back in the safe scale range.
The above only is preferred embodiment of the present utility model, yet does not limit the scope that this utility model is implemented with this, and the equivalence of doing according to the technical solution of the utility model and description changes and modification, all should belong to the scope that this utility model is contained.
Claims (9)
1. but the pedicle of vertebral arch spiral shell of early warning is bored, and the setting of cone front end has the screw rod of wedge shape head; It is characterized in that: establish the space of hollow in the cone, fixed installation pressure converter and prompting apparatus in this space; The afterbody of screw rod stretches in this space, and the pressure-sensitive end face of pressure converter axially contacts with the afterbody of screw rod; The efferent of pressure converter is connected with the prompting apparatus that is positioned at the cone afterbody.
2. but the pedicle of vertebral arch spiral shell of early warning according to claim 1 is bored, and it is characterized in that: described cone front end is established the axial jack of grafting screw rod tail, and this jack has draw-in groove; The side surface of screw rod tail is provided with the wing projection, and the afterbody of screw rod and wing projection thereof become to be slidingly matched with the jack and the draw-in groove thereof of cone front end.
3. but the pedicle of vertebral arch spiral shell of early warning according to claim 2 is bored, and it is characterized in that: the axial end of described screw rod tail is the semicircle sphere.
4. but the pedicle of vertebral arch spiral shell of early warning according to claim 3 is bored, and it is characterized in that: the wedge shape splitter place of described screw head is flat or flat arcuation.
5. but according to the pedicle of vertebral arch spiral shell awl of claim 1 or 2 or 3 or 4 described early warning, it is characterized in that: described pressure converter is a piezoelectric sender, and prompting apparatus is the alarm with alarm threshold value governor motion; The pressure-sensitive end face of piezoelectric sender axially contacts with the afterbody of screw rod; The output lead of piezoelectric sender becomes to be electrically connected with alarm; The alarm threshold value governor motion of alarm is located at the surface of cone.
6. but the pedicle of vertebral arch spiral shell of early warning according to claim 5 is bored, and it is characterized in that: described alarm is an audible-visual annunciator.
7. but according to the pedicle of vertebral arch spiral shell awl of claim 1 or 2 or 3 or 4 described early warning, it is characterized in that: described pressure converter comprises pressure/shift transformation mechanism and displacement/rotational mapping device, and prompting apparatus is the dial gauge with pointer shaft; The pressure-sensitive end face of pressure converter is located at the front end of pressure/shift transformation mechanism, and the displacement efferent of pressure/shift transformation mechanism connects the displacement input part of displacement/rotational mapping device; The rotation efferent of displacement/rotational mapping device connects the pointer shaft of dial gauge.
8. but the pedicle of vertebral arch spiral shell of early warning according to claim 7 is bored, and it is characterized in that: described pressure/shift transformation mechanism has housing, baffle plate, spring and the baffle plate connecting rod of tubular; Baffle plate is that the pressure-sensitive end face of pressure converter is located in the opening of housing front end; Spring is located in the housing and the bottom of contact baffle plate and housing respectively, two ends; The front end of baffle plate connecting rod is fixed on the baffle plate, and the rear end of baffle plate connecting rod is the displacement input part that the displacement efferent of pressure/shift transformation mechanism passes the via hole connection displacement/rotational mapping device of housing bottom.
9. but the pedicle of vertebral arch spiral shell of early warning according to claim 8 is bored, and it is characterized in that: described displacement/rotational mapping device has housing, tooth bar, Knucle-gear and a pair of intermeshing conical gear of tubular; Tooth bar is that the displacement input part of displacement/rotational mapping device is located in the opening of housing front end and connects the baffle plate connecting rod of pressure/shift transformation mechanism; Knucle-gear and a conical gear are co-axially mounted in the opening of housing front end, the engagement of knuckle-tooth wheel and rack; The rotating shaft of another conical gear is the pointer shaft that the rotation efferent of displacement/rotational mapping device connects dial gauge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200079856U CN201079421Y (en) | 2007-08-17 | 2007-08-17 | Pedicle of vertebral arch screw cone capable of early warning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200079856U CN201079421Y (en) | 2007-08-17 | 2007-08-17 | Pedicle of vertebral arch screw cone capable of early warning |
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| Publication Number | Publication Date |
|---|---|
| CN201079421Y true CN201079421Y (en) | 2008-07-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200079856U Expired - Fee Related CN201079421Y (en) | 2007-08-17 | 2007-08-17 | Pedicle of vertebral arch screw cone capable of early warning |
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| Country | Link |
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| CN (1) | CN201079421Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104287821A (en) * | 2013-08-19 | 2015-01-21 | 池永龙 | Alarm channel drilling device |
| CN109674506A (en) * | 2018-11-19 | 2019-04-26 | 中国人民解放军第四军医大学 | Safe passage-opening awl |
-
2007
- 2007-08-17 CN CNU2007200079856U patent/CN201079421Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104287821A (en) * | 2013-08-19 | 2015-01-21 | 池永龙 | Alarm channel drilling device |
| CN104287821B (en) * | 2013-08-19 | 2018-08-17 | 池永龙 | Alarm open circuit device |
| CN109674506A (en) * | 2018-11-19 | 2019-04-26 | 中国人民解放军第四军医大学 | Safe passage-opening awl |
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Assignee: Double Engine Medical Material Co., Ltd. Assignor: Wang Zongjiang|Lin Bin Contract record no.: 2010350000065 Denomination of utility model: Pedicle of vertebral arch screw cone capable of early warning Granted publication date: 20080702 License type: Exclusive License Record date: 20100427 |
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