Pedicle of vertebral arch supersonic sounding instrumentTechnical field
The invention belongs to a kind of medical apparatus and instruments, particularly a kind of pedicle of vertebral arch supersonic sounding instrument of the pediculus arcus vertebrae boring for spinal surgery.
Background technology
The vertebral arch pedicle of vertebral column drill bit that uses clinically at present is simple metal borer,
Without any detection or navigation feature, when operator carried out vertebral arch pedicle of vertebral column boring, even deviation also easily appears in veteran spinal surgeons, the lighter was that the duct is incorrect, severe patient Spinal Cord nerve or trunk cause the generation of severe complication.
Therefore, in order to improve accuracy rate and the safety of vertebral arch pedicle of vertebral column boring, numerous medical personnels and biological engineering are an apprentice of stage construction, multi-angle is explored and study, strengthening guiding with monitoring in art is exactly major progress and the achievement that obtains in recent years, and wherein uses and report that more method has: the application of the application of somatosensory evoked potential and Motion Evoked Potential, electromagnetic field in art, monoplane X-ray examination, three-dimensional X-ray examination, computer navigation etc.In said method, electrophysiologic monitoring is round-about way, can not reflect intuitively the puncture of pedicle of vertebral arch and the position of screw, thereby and only have inaccurate when puncture or pedicle screw malposition and cause nerve injury just can produce later on electrophysiologic response providing caution, be the prompting of property afterwards, not forward-looking and real-time.Although and image-guided and the method for monitoring has certain objectivity and real-time, but still can not reflect the accuracy of vertebral pedicle puncture and the integrity in pedicle of vertebral arch bone duct fully, and it is expensive to waste time and energy, particularly not only price is high as computer navigation system, use complicated, and the empirical factor that is subjected to user affect very large, the simultaneously image-guided radiolesion that has increased patient and patient.Based on this, over nearly two, three years, there is the author to attempt adopting ultrasonic method to guide the placement of pedicle screw abroad.For the human body basic not damaged, and have better specific aim and definitiveness due to ultrasonic.But the ultrasonic method of external report has plenty of hypothesis pedicle of vertebral arch duct to be worn out, cause that by ultrasonic muscle contraction is monitored its electrophysiologic response on every side, having plenty of the pedicle of vertebral arch duct makes rear use cardiovascular ultrasonic probe and surveys, still do not have real-time and perspective, the same price is expensive, operates also more numerous and diverse.
Summary of the invention
The objective of the invention is to design a kind of pedicle of vertebral arch supersonic sounding instrument.Design principle of the present invention is the principle of ultra sonic imaging: in tissue, the acoustic impedance characteristic difference of different tissues is obvious, soft tissue average out to 1.524, and skeleton is 5.570, the acoustic impedance characteristic is lower, its ultra sonic imaging is more clear, according to the ultra sonic imaging principle, designs a kind of pedicle of vertebral arch supersonic sounding instrument.
What the present invention will solve is that deviation easily appears in existing normal aggregates bit bore, and utilizes CT, and X ray computer image navigation boring cost is high, the problem of complicated operation.
Technical scheme of the present invention is: the present invention includes pedicle of vertebral arch drill bit, computer, the display that is connected with computer, the pedicle of vertebral arch drill bit comprises drill body and handle, built-in at least one miniature ultrasonic probe in drill body top, the miniature ultrasonic control head is connected with the ultrasonic signal gain amplifier, the ultrasonic signal gain amplifier is connected with signal processor, and signal processor is connected with computer;
Miniature ultrasonic probe is used for emission and receives ultrasonic signal; The ultrasonic signal gain amplifier is used for the Probe Ultrasonic Searching signal that receives is amplified; Signal processor is for the treatment of the ultrasonic signal after amplifying and be converted to picture signal, and computer shows by display after being used for receiving picture signal and processing.
Advantage of the present invention is: 1, the application of pedicle of vertebral arch supersonic sounding instrument can be avoided the damage of spinal nerves, blood vessel and peripheral internal organs on the one hand, avoid on the other hand because of the blind repeated localised puncture of wearing, affect the curable grip and stability of screw, thereby accuracy and the safety that can greatly improve pediculus arcus vertebrae boring or put nail; 2, have simple to operate, easy to use, image is objective, and production cost and the advantage such as use cost is cheap; 3, ultrasound wave has safety, the characteristics that substantially have no side effect simultaneously.
Description of drawings
Fig. 1 is the structural representation of each assembly annexation of the present invention.
Fig. 2 is the structural representation of drill body of the present invention.
The specific embodiment
The present invention is further illustrated below in conjunction with drawings and the specific embodiments.
As shown in the figure, bag pedicle of vertebral arch drill bit of the present invention, computer, the display that is connected with computer.The pedicle of vertebral arch drill bit comprises drill body 1 and handle 2, the drill body 1 built-in miniature ultrasonic probe 6 of top one side, the built-in same miniature ultrasonic probe of corresponding opposite side.Miniature ultrasonic control head and ultrasonic signal gain amplifier lead to and connect.The ultrasonic signal gain amplifier is connected by wire 3 with signal processor 4, and signal processor 4 is connected with computer bywire 5.
Described ultrasonic signal amplifier is low noise ultrasonic signal amplifier, and it is built in handle hands 2.
Drill body 1 top is provided with the miniature ultrasonic probe installation cavity.Two miniature ultrasonic probe are installed in this installation cavity.Be provided with the ultrasonoscopy processing module for the treatment of picture signal in computer.Drill bit is provided with scale 7.
Miniature ultrasonic probe is used for emission and receives ultrasonic signal; The ultrasonic signal gain amplifier is used for the Probe Ultrasonic Searching signal that receives is amplified; Signal processor 4 is for the treatment of the ultrasonic signal after amplifying and be converted to picture signal, and computer shows by display after being used for receiving picture signal and processing.
operation principle of the present invention: large according to osseous tissue and soft tissue acoustic impedance property difference, the characteristics that osseous tissue acoustic impedance characteristic is strong, ultrasound wave is basic in osseous tissue is total reflection, be that its echo is stronger, and can not show preferably the soft tissue structure at osseous tissue rear, thereby when drill bit of the present invention is positioned at osseous tissue fully, be stronger echo, pass osseous tissue and work as drill bit, can show the soft tissue ultrasonogram when entering surrounding soft tissue, according to these characteristics, when the bit bore that uses with ultrasonic probe, the integrity in energy Real-Time Monitoring pedicle of vertebral arch bone duct, thereby in time adjust.