Abstract:
The invention relates to a sensor/guide wire device for biological pressure measurements having a guide wire (16, 17, 18, 21, 23) having a distal and a proximal end, and a pressure sensor device (19) mounted at the distal end of the guide wire. The distal portion can be a solid wire member (16) surrounded by a spiral member (18), and the sensor (19) can be an electrical sensor of a piezoresistive type. The sensor (19) is mounted on the solid wire (16). The sensor is mounted in a cantilevering fashion such that a pressure sensitive end of the sensor does not contact any structure other than its mount. This prevents forces (bending artifacts) from being exerted on the sensor, which could otherwise interfere with pressure measurements.
Abstract:
A multifunctional breath analyzer includes a receptor unit for receiving a breath sample from a test subject, a sensing unit providing a signal corresponding to the concentration of at least one volatile substance within the sample, elements for providing a signal indicative of the dilution of the breath sample, and an analyzing unit/processing unit for the identification and quantification of the volatile substance of the breath sample. The signal processing unit is configured to perform at least two different calculations for the quantification, and the signal processing unit is also configured to automatically display the result of a selected calculation, the selection being based on the signal indicating dilution.
Abstract:
A transmitter unit with an attachable energy source is provided for a sensor guidewire. The transmitter unit is adapted to be connected to a proximal end of a sensor guidewire provided, at its distal end, with a sensor to measure a physiological parameter inside a patient. In some embodiments, the transmitter unit is adapted to wirelessly communicate by a communication signal with a communication unit, arranged in connection with an external device, in order to transfer measured physiological data to the external device. The attachable energy source can be a battery pack or battery holder provided with connecting electrical connecting surfaces. Preferably, the connection is protected from penetrating fluids by a protective seal.
Abstract:
There is a sensor guide wire (1) for intravascular measurements of physiological variables in a living body. The sensor guide wire (1) comprises at least two elongate sections, a first tubular elongate section (2) being tubular in the longitudinal direction of the sensor guide wire (1), and a second elongate section (3) that is adapted to be inserted a predetermined distance (5) into said first tubular section (2), a sensor element (10) provided in the distal part of said sensor guide wire (1), for measuring the physiological variable and to generate a sensor signal in response to said variable, at least one signal transmitting cable connected to the sensor element (10) to transmit sensor signals to a male connector provided in the proximal part of said sensor guide wire (1). The tubular section (2) is provided with at least one through-going opening (4) in a direction perpendicular to the longitudinal direction of the guide wire (1) and positioned a second predetermined distance (6) from one end of the tubular section (2), wherein the guide wire (1) comprises a locking member (7) to be fitted into the opening (4) in order to join the sections (2, 3) together when the second elongate section (3) is inserted into the tubular section (2).
Abstract:
A sensor and guide wire assembly (21; 41; 61; 81) for intravascular measurements of a physiological variable in a living body includes a sensor element (22; 42; 62; 82) mounted at a distal sensor portion (23; 43; 63; 83) of a guide wire (24; 44; 64; 84), wherein the sensor portion exhibits a maximal cross-sectional dimension which is larger than a maximal cross-sectional dimension of guide wire portions (28, 30; 48, 50; 68, 70) located proximally of the sensor portion.
Abstract:
A sensor and insertion assembly 2 is used for intravascular measurement of pressure in a living body. The assembly includes, a sensor chip 6 having a substrate body 8 with a recess covered by a pressure sensitive film 10 thereby forming a cavity 12. A piezoelectric element, preferably in the form of a piezoelectric film 14, is arranged in connection with the pressure sensitive film, and energy is applied to the piezoelectric element such that acoustic waves are generated in the element. The piezoelectric element is arranged to generate an output signal, representing the pressure at the film, in dependence on the measured properties of the acoustic waves related to the deflection of the pressure sensitive film.
Abstract:
The invention relates to a device for measuring pressure, temperature and/or flow velocity. It includes a sensor (6) with a sensor support body (13) provided with a diaphragm (15) covering a cavity (14) formed in the support body (13). A pressure sensitive element (41) is mounted on the diaphragm, for recording pressure. Furthermore, a temperature sensitive resistor (42) is mounted in the vicinity of the pressure sensitive resistor and has a known temperature dependence, for recording temperature. It also includes an electrical circuit (43, 44, 45, 46) selectively outputting signals from either of the pressure sensitive element and the temperature sensitive resistor.
Abstract:
Medical system comprising a hollow catheter 14, for insertion into a human or animal body, and an elongated x-ray tube unit 12 provided with an x-ray tube 16 at its distal end and adapted to be inserted into the catheter. A distal pole 8 of the x-ray tube is connectable to a connection means 22 in said catheter, wherein the x-ray tube is energised via a single electrical conductor 18 in said x-ray tube unit connected to the proximal pole and via said connection means.
Abstract:
The invention relates to a device for measuring pressure, temperature and flow velocity. It comprises a sensor (6) with a sensor support body (13) provided with a diaphragm (15) covering a cavity (14) formed in the support body (13). A pressure sensitive element (41) is mounted on the diaphragm, for recording pressure. Furthermore, a temperature sensitive resistor (42) mounted in the vicinity of and having known temperature dependences, for recording temperature. It also comprises an electrical circuit (43, 44, 45, 46) selectively outputting signals from either of the pressure sensitive element and the temperature sensitive resistor.
Abstract:
The invention relates to an apparatus for the controlled delivery of ionizing radiation to a therapy location. It comprises a source (4) of ionizing radiation provided at the distal end of an elongated member (6). It also has a control unit (12) for controlling the movement of said radiation source (4) at the therapy location, via a driving unit (21, 22; 23, 24, 25, 26). A method according to the invention comprises controlling the radiation dose at the therapy location, by controlling the movement of the source.