Device and method for locating anatomical cavity in a body
First Claim
1. Device for locating a region which is situated in a body, comprising:
- a hollow needle;
a fluid-filled reservoirs which is in communication with said needle;
pump means for pressurizing the fluid;
measuring means for creating a pressure-measurement signal which is related to the pressure prevailing in the fluid;
signal-conversion means for converting said pressure-measurement signal created by said measuring means into a form which is suitable for further processing, and reproduction means for emitting an acoustic signal which is related to said pressure-measurement signal which has been converted by said signal-conversion means, wherein said reproduction means are designed to emit said acoustic signal which is representative of the pressure prevailing in the fluid.
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Accused Products
Abstract
The invention describes a device (1) for locating an anatomical cavity (15) inside a body (10). The device comprises a fluid-filled reservoir (30) which is closed off in a sealed manner by a displaceable plunger (32) and is connected to a hollow puncture needle (20).
To measure the pressure prevailing in the fluid, the device comprises a pressure gauge (40). A signal converter (50) is used to convert a continuous pressure-measurement signal provided by the pressure gauge (40) into a form which is suitable for further processing. A synthesizer (60) is designed to process the converted pressure-measurement signal into a continuous sound signal which is representative of the pressure.
If, during a displacement of the puncture needle (20), a needle point (21) reaches the anatomical cavity (15), the result is a readily perceptible change in the sound signal.
The device comprises recording means for recording the pressure-measurement signal over the course of time.
50 Citations
35 Claims
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1. Device for locating a region which is situated in a body, comprising:
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a hollow needle;
a fluid-filled reservoirs which is in communication with said needle;
pump means for pressurizing the fluid;
measuring means for creating a pressure-measurement signal which is related to the pressure prevailing in the fluid;
signal-conversion means for converting said pressure-measurement signal created by said measuring means into a form which is suitable for further processing, and reproduction means for emitting an acoustic signal which is related to said pressure-measurement signal which has been converted by said signal-conversion means, wherein said reproduction means are designed to emit said acoustic signal which is representative of the pressure prevailing in the fluid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 35)
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30. Device for locating a region which is situated in a body, comprising:
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a hollow needle;
a fluid-filled reservoir which is in communication said needle;
pump means for pressurizing the fluid;
measuring means for creating a pressure-measurement signal which is related to the pressure prevailing in the fluid;
signal-conversion means for converting said pressure-measurement signal created by said measuring means into a form which is suitable for further processing, characterized by recording means which are designed to record said pressure-measurement signal over the course of time. - View Dependent Claims (31, 32)
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33. Method for signalling pressure in a body at the location of a needle point of a hollow needle located in said body to an observer, comprising the following steps:
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introducing fluid into the needle;
applying an elevated pressure to the fluid;
measuring the pressure in the fluid; and
generating an acoustic signal which is representative of the instantaneous pressure in the fluid. - View Dependent Claims (34)
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Specification