CN1185983A

CN1185983A - Supersonic therapeutic instrument for cerebral thrombus

Info

Publication number: CN1185983A
Application number: CN97115899A
Authority: CN
Inventors: 宋世鹏; 江耀纯; 叶志频
Original assignee: Aowo International Science & Tech Development Co Ltd Shenzhen City
Current assignee: Aowo International Science & Tech Development Co Ltd Shenzhen City
Priority date: 1997-09-27
Filing date: 1997-09-27
Publication date: 1998-07-01

Abstract

An ultrasonic therapeutic apparatus for curing cerebral thrombosis has multiple ultrasonic probes generating ultrasonic waves to a common focus. Said ultrasonic probes are installed via slid block connectors to a semi-spherical or semi-ring geometry. They can move around the common focus in order to close to the head of the patient. The mechanical effect is primary and the heat and cavitation effects are secondary. Its advantage is less damage to blood vessel.

Description

The ultrasonic treatment unit that is used for the treatment of cerebral thrombosis

The present invention relates to a kind of ultrasonic treatment unit, especially for the stereoscopic ultrasonic directional radiotherapy apparatus of treatment cerebral thrombosis.

Ultrasonic therapy at present mainly utilizes hyperacoustic heat effect, and concentration ultrasonic can make tissue temperature moment surpass 70 ℃, is enough to the heat of the tumor tissues in the target area downright bad.But heating is confined to target tissue and prevents the normal surrounding tissue superheated, any have the doctor of hyperthermia treatment of carcinoma practical experience all to know, reach heat control to whole treatment volume, be very difficult technically, especially under the situation that quantity is few and probe does not move of popping one's head in, the problem of skin burn is unavoidable, and, the temperature measuring feed back control system also is need very high technical merit, makes device complicated undoubtedly.Under a few cases, also have and use that hyperacoustic cavitation effect treats, but cavitation effect to around the focus and the damage of the health tissues on the path of ultrasound wave process big and wayward, specification requirement that needs are higher.

For the treatment cerebral thrombosis, the shortcoming of existing ultrasonic treatment unit is just more obvious: owing to lack effective positioner, the more important thing is the destruction to blood vessel wall of heat effect and cavitation effect, existing ultrasonic treatment unit is to be used for the treatment of cerebral thrombosis class disease at all.

On the basis of the above-mentioned weak point of analyzing prior art; the present invention proposes a kind of device that adopts hyperacoustic mechanical effect that cerebral thrombosis is treated; make it simple in structure, easy to operate, the difficult problem having avoided temperature control and in the mediation thromboembolism, protected blood vessel wall.

For achieving the above object, the present invention takes following technical scheme: a kind of ultrasonic treatment unit, include a plurality of supersonic generators and ultrasound wave sound head 6, public focus O of 6 emitting sound wave directives of sound head is characterized in that: sound head 6 is installed on the hemispherical or semicircular solid 3 by slide block connector 5; Described hemispherical or semicircular solid 3 is again the arc-shaped guide rail of slide block 5 simultaneously, thereby sound head 6 can be rotated around public focus O; Sound head 6 can radially slide changing the position, so that sound head 6 can be close to patient's to be treated head 1 during treatment;

The main effects that the selection of the total sound intensity of the frequency of 6 ultrasonic waves transmitted of sound head and focus place makes its ultrasonic waves transmitted produce in the human body body is a mechanical effect, and heat effect and cavitation effect then are secondary efficacy.

Adopt after the such scheme because heat effect and cavitation effect are very little, thereby to health tissues particularly near the damage of the blood vessel the thromboembolism reduce greatly; And on the other hand,, thereby can reach therapeutic effect because the effect of mechanical effect is dredged the drift that forms thromboembolism.In addition,, can make sound head, shine from suitable position as far as possible near focus because the position of sound head 6 can be adjusted.

Fig. 1 is a sketch map of the present invention.

Below in conjunction with accompanying drawing and by embodiment the present invention is done further detailed description.

See Fig. 1, ultrasonic treatment unit in the present embodiment includes a plurality of supersonic generators and ultrasound wave sound head 6, public focus O of 6 emitting sound wave directives of sound head is characterized in that: sound head 6 is installed on the hemispherical or semicircular solid 3 by slide block connector 5; Described hemispherical or semicircular solid 3 is again the arc-shaped guide rail of slide block 5 simultaneously, thereby sound head 6 can be rotated around public focus O; Sound head 6 can radially slide changing the position, so that sound head 6 can be close to patient's to be treated head 1 during treatment;

Studies show that being suitable for suitable frequency range of the present invention is 100KHz～5MHz; Sound head 6 at total sound intensity at public focus O place at 150W/cm ²When following, cavitation effect is very little, much smaller than 150W/cm ²The time, the spreading effect of heat makes that the temperature rise at focus place can not be very big, can think that at this moment mechanical effect is a main effects.The present invention mainly utilizes hyperacoustic mechanical effect.In the present embodiment, frequency of ultrasonic is taken as 1MHz, and the radiant power of each sound head 6 is 2.5W/cm ², have 5 sound heads.

In actual use, according to the difference of focus locate mode, this device can also have different fixing and regulative modes.For example in the present embodiment, (also can be non-intrusion type) be realized by an intrusive mood headstock 2 in the location of focus.During actual therapeutic, load onto the headstock 2 in patient head earlier, alignment pin is tightened on the skull; Put on CT (or MRI) support, carry out CT (or MRI) imaging, utilize computer to pass through the coordinate position that treatment planning systems (TPS) provides focus; Take off CT (or MRI) support then, load onto described ultrasonic treatment unit, and be fixed on the headstock 2 by positioning clamping body 4; Data according to TPS are regulated several degree of freedom of popping one's head in, and make public focus O and focus overlap, and then treat.

During actual therapeutic, in order to reduce hyperacoustic decay, skull partly can be removed, thereby be made the ultrasound wave sound head directly contact (it is exactly for this purpose that sound head can radially slide in slide block 5 upper edges), can reduce skull so greatly hyperacoustic reflection and decay with meninges.Because treatment is to adopt hyperacoustic mechanical effect,, thereby also just can not produce harmful effect such as burn to the meninges of contact so sound head can be not overheated.

The embodiment that other can also be arranged certainly.

Claims

1, a kind of ultrasonic treatment unit includes a plurality of supersonic generators and ultrasound wave sound head (6), and public focus O of sound head (6) institute emitting sound wave directive is characterized in that; Sound head (6) is installed on the hemispherical or semicircular solid (3) by slide block connector (5); Described hemispherical or semicircular solid (3) is again the arc-shaped guide rail of slide block (5) simultaneously, thereby sound head (6) can be rotated around public focus O; Sound head (6) can radially slide changing the position, so that sound head (6) can be close to patient's to be treated head (1) during treatment;

The main effects that the selection of the total sound intensity of frequency and focus place of sound head (6) institute ultrasonic waves transmitted makes its ultrasonic waves transmitted produce in the human body body is a mechanical effect, and heat effect and cavitation effect then are secondary efficacy.

2, a kind of ultrasonic treatment unit as claimed in claim 1, it is characterized in that also comprising: a location clamping device (4), be used for and the headstock (2) links fixingly, the described headstock (2) is to be fixed in locating support on people's the skull by the mode of infection or other modes; A coordinate actuator (7) with the position of adjustment of treatment device on the headstock (2), thereby changes the position of public focus O with respect to the headstock (2), so that overlap at the auxiliary public focus O and the focus point to be treated of making down of treatment planning systems.

3, a kind of ultrasonic treatment unit as claimed in claim 1 or 2 is characterized in that: the frequency range of described ultrasound wave sound head (6) institute ultrasonic waves transmitted is 100KHz～5MHz, described sound head (6) at total sound intensity at public focus O place at 150W/cm ²Below.