Instrument for treating biological tissue, method for generating shock wave-like pressure waves in such an instrument
First Claim
1. An instrument for the treatment of biological tissue, comprising a housing in which are arranged a ballistic generator for generating extracorporeal shock wave pressure waves and a transfer element permanently placed on the biological tissue for coupling said pressure waves into the bodies of living beings, said transfer element coupling non-focused, ballistically generated, shock wave pressure waves into said biological tissue, which are generated by a reciprocating striking member accelerated to a final velocity of more than 5 meters/second by means of a pneumatic medium under working pressure in a pressure channel and striking said transfer element, a distal end of said pressure channel at which the transfer element is arranged being connected with a back-pressure chamber into which the pneumatic medium present distally of the striking member can flow as the striking member is accelerated towards the transfer element,wherein a quick-action valve releases the pneumatic medium under working pressure into the pressure channel, wherein a control circuit controls the opening period of the valve as a function of at least one or a combination of the parameters of working pressure, or pressure in the back-pressure chamber, resulting in the valve opening and/or closing as a function of at least one of the parameters of working pressure or pressure in the back-pressure chamber.
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Abstract
The invention relates to an instrument for treating biological tissue, including a housing, in which is disposed a ballistic device for generating extracorporeal shock wave-like pressure waves and a transfer element permanently placed on the biological tissue, said element coupling the pressure waves into the body of living creatures, wherein the transfer element couples non-focused, ballistically generated, shock wave-like pressure waves into the biological tissue, the waves generated by a striking member that is accelerated to a high final velocity of over 5 m/s by a pneumatic medium which is under an operating pressure in a pressure channel. A quick-acting valve releases the pneumatic medium, which is under working pressure, into the pressure channel, wherein a control circuit controls the duration of opening of the valve as a function of at least one or a combination of the following parameters: working pressure, impact frequency or pressure in the back-pressure chamber.
15 Citations
12 Claims
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1. An instrument for the treatment of biological tissue, comprising a housing in which are arranged a ballistic generator for generating extracorporeal shock wave pressure waves and a transfer element permanently placed on the biological tissue for coupling said pressure waves into the bodies of living beings, said transfer element coupling non-focused, ballistically generated, shock wave pressure waves into said biological tissue, which are generated by a reciprocating striking member accelerated to a final velocity of more than 5 meters/second by means of a pneumatic medium under working pressure in a pressure channel and striking said transfer element, a distal end of said pressure channel at which the transfer element is arranged being connected with a back-pressure chamber into which the pneumatic medium present distally of the striking member can flow as the striking member is accelerated towards the transfer element,
wherein a quick-action valve releases the pneumatic medium under working pressure into the pressure channel, wherein a control circuit controls the opening period of the valve as a function of at least one or a combination of the parameters of working pressure, or pressure in the back-pressure chamber, resulting in the valve opening and/or closing as a function of at least one of the parameters of working pressure or pressure in the back-pressure chamber.
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9. An instrument for the treatment of biological tissue, comprising a housing in which are arranged a ballistic generator for generating extracorporeal shock wave pressure waves and a transfer element permanently placed on the biological tissue for coupling said pressure waves into the bodies of living beings, said transfer element coupling non-focused, ballistically generated, shock wave pressure waves into said biological tissue, which are generated by a reciprocating striking member accelerated to a final velocity of more than 5 meters/second by means of a pneumatic medium under working pressure in a pressure channel and striking said transfer element, a distal end of said pressure channel at which the transfer element is arranged being connected with a back-pressure chamber into which the pneumatic medium present distally of the striking member can flow as the striking member is accelerated towards the transfer element, wherein a quick-action valve releases the pneumatic medium under working pressure into the pressure channel in dependence on the striking frequency set, wherein an opening in the back-pressure chamber limits the pressure building up in the back-pressure chamber,
wherein said opening of the back-pressure chamber is formed by a narrow orifice or by a pressure relief valve.
- 10. A method for generating shock wave pressure waves pressure waves in an instrument for the treatment of biological tissue, wherein a ballistic means generates extracorporeal shock wave pressure waves and a transfer element permanently placed on the biological tissue couples said pressure waves into the bodies of living beings, wherein non-focused, ballistically generated, shock wave pressure waves are coupled into said biological tissue, which are generated by a reciprocating striking member accelerated to a final velocity of more than 5 meters/second by means of a pneumatic medium under working pressure in a pressure channel and striking said transfer element, a distal end of said pressure channel at which the transfer element is arranged being connected with a back-pressure chamber into which the pneumatic medium present distally of the striking member is introduced during the stroke movement of the striking member towards the transfer element, characterized by controlling the opening period of a quick-acting valve, releasing the working pressure into the pressure channel, as a function of at least one or a combination of the parameters of working pressure or pressure in the back-pressure chamber.
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12. A method for generating shock wave pressure waves in an instrument for the treatment of biological tissue, wherein a ballistic means generates extracorporeal shock wave pressure waves and a transfer element permanently placed on the biological tissue couples said pressure waves into the bodies of living beings, wherein non-focused, ballistically generated, shock wave pressure waves are coupled into said biological tissue, which are generated by a reciprocating striking member accelerated to a final velocity of more than 5 meters/second by means of a pneumatic medium under working pressure in a pressure channel and striking said transfer element, a distal end of said pressure channel at which the transfer element is arranged being connected with a back-pressure chamber into which the pneumatic medium present distally of the striking member is introduced during the stroke movement of the striking member towards the transfer element, characterized by introducing the working pressure into the pressure channel by means of a quick-acting valve in dependence on an adjustable striking frequency and limiting the pressure in the back-pressure chamber by partly venting the back-pressure chamber as the pressure builds up wherein the venting is made by using an opening in the back-pressure chamber, wherein said opening of the back pressure chamber is formed by a narrow orifice or by a pressure relief valve.
Specification