CN209074766U - A kind of anterior cervical decompression trepan that depth automatically controls - Google Patents
A kind of anterior cervical decompression trepan that depth automatically controls Download PDFInfo
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- CN209074766U CN209074766U CN201821409712.9U CN201821409712U CN209074766U CN 209074766 U CN209074766 U CN 209074766U CN 201821409712 U CN201821409712 U CN 201821409712U CN 209074766 U CN209074766 U CN 209074766U
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- trepan
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- guide rod
- screw thread
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Abstract
The utility model discloses a kind of anterior cervical decompression trepan that depth automatically controls, the external trepan including internal guide rod and with internal guide rod suit；External trepan is hollow cavity, and the lower end of external trepan is provided with sawtooth, and upper end is provided with rotating handle, and cavity top is provided with internal screw thread；Internal guide rod lower part is provided with tapping screw thread, and top is provided with the fine thread with screw-internal thread fit；The major diameter of the tapping screw thread of internal guide rod is less than or equal to the internal diameter of external trepan；External trepan lower part is provided with observation window.The trepan is by being threadedly engaged the transmitting for realizing downward cutting force between mechanical device, rotating handle, which need to only be rotated, can be realized cutting to cervical vertebral body, trepan penetrates after sclerotin, fixed link can be at free state together with the annular bone column in trepan, rotation dynamics can weaken rapidly, even if continuing to rotate trepan, trepan depth will not increase, downward active force is no longer generated, guarantees Zhui pipe Nei Ji Marrow not by the damage of trepan.
Description
Technical field
The utility model relates to medical instruments fields, and in particular to a kind of anterior cervical decompression ring that depth automatically controls
Saw.
Background technique
Trepan is to treat instrument indispensable in the operation of cervical spondylosis anterior cervical decompression, and trepan used in the prior art is top
The round tube being serrated is held, needs firmly to press trepan end in surgical procedure, while rotating trepan and cutting cervical vertebra
It cuts, it is time-consuming and laborious, and full of spinal center nerve in cervical spinal canal, and the spinal center nerve for depressurizing corresponding position has been in
The clinical symptoms damaged in various degree are oppressed and occur, level of compression alreadys exceed the critical value of spinal cord injury.Cervical vertebra is at this time
Make the vibration occurred slightly that can also aggravate spinal cord injury symptom, therefore, anterior cervical decompression is highly difficult, high risk a behaviour
Make technology.Doctor is only the control for rule of thumb carrying out depth of cut in surgical procedure, does not observe the depth location of trepan,
It when trepan cuts through the moment of centrum, is easy to enter canalis spinalis under effect of inertia, damages intraspinal tube spinal nerve, cause patient high-order
Paralysis, causes great malpractice.To avoid trepan from damaging spinal cord, clinically the common approach is that after trepan cutting to a certain degree
It docks adnerval part using curet again to carry out to pressure object striking off, this method operates more troublesome, not only strikes off speed
Degree is made slow progress, and extends operating time, and doctor's operation is careless slightly, be may also lead to curet landing and is caused spinal injury.
Summary of the invention
To solve the above-mentioned problems, the utility model discloses a kind of anterior cervical decompression trepan that depth automatically controls, should
Trepan is by being threadedly engaged the transmitting for realizing downward cutting force between mechanical device, without the strength of downward push when application,
Need to rotate clockwise trepan handle；After trepan penetrates sclerotin, fixed link can be at together with the annular bone column in trepan
Free state, even if continuing to rotate trepan at this time, trepan depth will not increase, but the dynamics rotated can weaken rapidly, thus
Downward active force is no longer generated, guarantees Zhui pipe Nei Ji Marrow not by the damage of trepan.
A kind of anterior cervical decompression trepan that depth automatically controls, the outside including internal guide rod and with internal guide rod suit
Trepan；
The external trepan is hollow cavity, and the lower end of the external trepan is provided with sawtooth, and upper end is provided with
Rotating handle, the cavity top are provided with internal screw thread；
The internal guide rod lower part is provided with tapping screw thread, and top is provided with the fine thread with screw-internal thread fit；
The major diameter of the tapping screw thread of internal guide rod is less than or equal to the internal diameter of external trepan.
Preferably, the screw pitch of the fine thread and internal screw thread is 0.6~0.7mm；
Preferably, the external trepan lower part is provided with observation window；
Preferably, the horizontal width of the observation window is 10mm, and vertical height is 20mm；
Preferably, the diameter of the external trepan is 15mm；
Preferably, the tapping screw thread length is 8~10mm；
Preferably, the fine thread length is 30~50mm.
Specific use process is as follows for the device: internal guide rod is first fixed on to the cervical vertebra vertebra for needing to depressurize using tapping screw thread
On gap, external trepan is covered on internal guide rod, internal screw thread and fine thread cooperate, and rotate rotating handle, and external trepan exists
Realize the cutting to cervical spinal canal to promoting inside cervical spinal canal along internal guide rod while rotation, when external trepan penetrate sclerotin with
Afterwards, internal guide rod loses support, no longer generates downward active force rotating trepan at this time, guarantees that ridge Marrow is not in cervical spinal canal
Damage by trepan.
The utility model has the beneficial effects that
(1) by the cooperation of internal screw thread on fine thread on internal guide rod and external trepan, trepan can be made threadingly to revolve
It is longitudinally propelling while turning along guide rod realization, makes cervical spinal canal cutting operation easy-to-operate；
(2) setting of fine thread can increase centripetal force；
(3) advanced by being threadedly engaged the external trepan of realization along internal guide rod, no longer generated after trepan penetrates sclerotin
Downward active force guarantees Zhui pipe Nei Ji Marrow not by the damage of trepan.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of application for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the utility model overall structure diagram；
Fig. 2 is external trepan structural schematic diagram；
Fig. 3 is internal guide rod structure schematic diagram；
In figure: 1, rotating handle, 2, internal guide rod, 3, external trepan, 4, cervical vertebral body, 5, observation window, 6, internal screw thread, 7,
Fine thread, 8, tapping screw thread, 9, spinal cord, 10, cause pressure object, 11, canalis spinalis, 12, interverbebral disc.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Whole description, it is clear that described embodiments are only a part of embodiments of the present application, instead of all the embodiments.It is based on
Embodiments herein, every other reality obtained by those of ordinary skill in the art without making creative efforts
Example is applied, shall fall in the protection scope of this application.
In the description of the present invention, it should be understood that term "inner", "outside", "upper", "lower" instruction orientation
Or positional relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description the utility model and simplification is retouched
It states, rather than the device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation,
Therefore it should not be understood as limiting the present invention.
As described in the background art, when carrying out cutting operation to cervical vertebral body using common trepan, depth of cut can only
Experience by doctor is grasped, careless slightly to switch to nerve, will result in patient's paralysis.For this purpose, disclosure of the invention is as shown in Figs. 1-3
A kind of anterior cervical decompression trepan that depth automatically controls.The trepan includes internal guide rod 2 and external trepan 3；Internal guide rod 2
It is arranged with tapping screw thread 8, tapping screw thread length is preferably 8~10mm, and for guide rod to be fixed on cervical vertebral body, inside is led
The upper end of bar 2 is provided with fine thread 7, for cooperating with external trepan 3 so that while external trepan 3 threadingly rotates to
The feeding of 4 direction of cervical spinal canal.The preferred length of fine thread 7 is 30~50mm.
The diameter of external trepan 3 is 15mm, is hollow cavity, and the internal screw thread 6 of closely-pitched, the interior spiral shell is arranged in cavity internal upper part
Fine thread 7 on line 6 and internal guide rod 2 cooperates, and to increase feeding dynamics, accurately controls the amount of feeding, prevented large inflow
Cervical spinal canal is caused excessively to cut, screw pitch of fine thread 7 and internal screw thread 6 is preferably 0.6~0.7mm at this, by mutual
Screw-driven, realize trepan cutting feeding.For convenience of processing and replacing, one can be welded in the upper end of external trepan 3 herein
The wing nut of a closely-pitched makes the fine thread of the screw thread and internal guide rod 2 in wing nut by operating wing nut both wings
Feeding is realized in 7 cooperations.
The outer diameter of the tapping screw thread 8 of internal guide rod 2 is less than or equal to the internal diameter of external trepan 3, with size phase between the two
Together, realize that clearance fit is preferred embodiment in tolerance range.
External 3 lower end of trepan is provided with the sawtooth for cutting operation, and upper end is provided with the rotation for operating trepan feeding
Handle 1 is changed hands, in order to observe the trepan amount of feeding, the lower part of external trepan 3 is provided with observation window, the level of observation window is wide
Degree is 10mm, and vertical height is 20mm.
Tapping screw thread 8 on internal guide rod 2 when in use, is first fixed on cervical vertebra vertebra using the principle of thread tapping by the device
At interverbebral disc 12 on body 4, pierce it is deep-controlled in 8~10mm, then by 3 sets of external trepan on internal guide rod 2, this
Sample internal screw thread 6 and fine thread 7 cooperate, and rotate rotating handle 1, and external trepan 3 is while rotating along internal guide rod 2 to cervical vertebra
It is fed inside centrum 4, realizes cutting to cervical vertebral body, after external trepan 3 penetrates sclerotin, internal guide rod 2 is together with being cut
The cervical vertebra vertebra and cervical vertebral body overall separation cut off, internal guide rod 2 lose support, and operation doctor can feel rotation moment
Turn diminished strength, even if rotating external trepan 3 at this time, due to itself rotating the rotation that external trepan is horizontal circumferencial direction,
It will not make power downwards, so the active force towards 4 direction of cervical vertebral body will not be generated again, guarantee the Nei Ji Marrow 9 of canalis spinalis 11 not
Damage by external trepan.Doctor lifts trepan upwards at this time, and external trepan 3 is together with internal guide rod 2 and is cut neck
Vertebra vertebra takes out together, then pressure object 10 will be caused to take out, that is, completes the decompression operation operation of anterior cervical vertebrae.
The foregoing description of the disclosed embodiments makes professional and technical personnel in the field can be realized or use the application.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the application.Therefore, the application
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (7)
1. the anterior cervical decompression trepan that a kind of depth automatically controls, which is characterized in that led including internal guide rod (2) and with inside
The external trepan (3) of rod set dress；
The external trepan (3) is hollow cavity, and the lower end of the external trepan (3) is provided with sawtooth, upper end setting
Have rotating handle (1), the cavity top is provided with internal screw thread；
Described internal guide rod (2) lower part is provided with tapping screw thread (8), and top is provided with and the fine thread of screw-internal thread fit (7)；
The major diameter of the tapping screw thread (8) of internal guide rod (2) is less than or equal to the internal diameter of external trepan (3).
2. the anterior cervical decompression trepan that a kind of depth as described in claim 1 automatically controls, which is characterized in that the closely-pitched
The screw pitch of screw thread and internal screw thread is 0.6~0.7mm.
3. the anterior cervical decompression trepan that a kind of depth as described in claim 1 automatically controls, which is characterized in that the outside
Trepan lower part is provided with observation window (5).
4. the anterior cervical decompression trepan that a kind of depth as claimed in claim 3 automatically controls, which is characterized in that the observation
The horizontal width of window is 10mm, and vertical height is 20mm.
5. the anterior cervical decompression trepan that a kind of depth as described in claim 1 automatically controls, which is characterized in that the outside
The diameter of trepan is 15mm.
6. the anterior cervical decompression trepan that a kind of depth as described in claim 1 automatically controls, which is characterized in that the self tapping
The length of screw thread is 8~10mm.
7. the anterior cervical decompression trepan that a kind of depth as described in claim 1 automatically controls, which is characterized in that the closely-pitched
The length of screw thread is 30~50mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821409712.9U CN209074766U (en) | 2018-08-30 | 2018-08-30 | A kind of anterior cervical decompression trepan that depth automatically controls |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821409712.9U CN209074766U (en) | 2018-08-30 | 2018-08-30 | A kind of anterior cervical decompression trepan that depth automatically controls |
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| CN209074766U true CN209074766U (en) | 2019-07-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109044478A (en) * | 2018-08-30 | 2018-12-21 | 山东中医药大学 | A kind of anterior cervical decompression trepan that depth automatically controls |
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- 2018-08-30 CN CN201821409712.9U patent/CN209074766U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109044478A (en) * | 2018-08-30 | 2018-12-21 | 山东中医药大学 | A kind of anterior cervical decompression trepan that depth automatically controls |
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