Abstract: Method and apparatus for collecting and/or growing anaerobic or aerobic biological specimens. A slidable inner rod and outer tube assembly is provided with rear, middle and front seals which define two coaxial sealed chambers of variable volume within the rod and tube assembly. The front chamber is controllably unsealed to receive a biological specimen. The front chamber is then resealed by manipulation of the tube and rod assembly which may also thereafter cause passage of a biological culture growth medium, transport materials, etc. from a rear chamber into the front chamber by reducing the volume of the rear chamber. The biological specimen is thus collected and may be transferred to a growth medium or the like in a completely protected environment immediately after its collection within an internal organ (for example) of a living body.
Abstract: Vaginal muscle contraction is sensed by change of pressure within a flexible, hollow tubular member that is adapted to be compressed in response to muscle contraction. A simple pressure transducer embodies a pressure tube connected with the tubular sensing member and having an end covered by a flexible diaphragm that expands in response to increased pressure so as to progressively block light transmitted to a photosensitive resistor. The resistor controls an electrical signal that is employed to provide an audible or visual display that provides a measure of relative strength of muscular contraction and which also may be used in a biofeedback loop to inform the user of the intensity of the contraction. Accuracy of the inexpensive transducer is increased by compensating the output electrical signal for both nonlinearity and hysteresis of the distensible rubber diaphragm.
December 3, 1982
Date of Patent:
October 16, 1984
David A. Giem, Barry L. Aaronson, Charles K. Jones
Abstract: An optical analyzer such as oximeter is provided including a source of light having a plurality of different wavelengths. At least two or more of the different wavelengths have a fixed relationship of light absorption after coaction with hemoglobin oxide. The light is directed at the subject tissue and received after coaction by an optical probe. A first signal representative of the degree of light absorption at a predetermined standard wavelength is determined and then an attempt is made to match a second wavelength having a fixed relationship of light absorption to the predetermined standard wavelength, e.g., equal absorption, to generate a second signal representative of the second wavelength, whereby the amount of hemoglobin oxide can be determined in the bloodstream.
Abstract: There is disclosed blood pressure measuring equipment comprising a sleeve with a chamber inflatable by fluid and a measurement transducer for determining the circumference of an arm to which the sleeve is attached. A pressure sensor is provided to detect pressure in the chamber and is electrically connected through electronic components with two analog stores for storage of measured pressure values representing systolic and diastolic blood pressure. An indicating control device is connected between the stores and a digital display unit and comprises a pressure value correcting device by means of which the pressure values can be corrected, in dependence on the circumference of the arm as determined by the transducer, during readout of the stores. As a result, errors in the pressure values due to different arm circumferences can be eliminated.
Abstract: Method and apparatus are disclosed for obtaining flow information of a conductive fluid by detecting the streaming potential and analyzing the resultant signal. In a particular embodiment for detecting abnormal blood velocities in the arterial tree, the apparatus includes a flexible sensor having two fixedly spaced apart electrodes and a common mode signal electrode. Each sensor electrode is connected to an input of a differential amplifier and the common electrode is connected to the common input of the differential amplifier. The output signal from the differential amplifier, after filtering and amplification is provided to a recorder or oscilloscope so that it can be compared with the normal or average signal.A particular embodiment of the method is used to detect blood flow abnormalities, either too fast or too slow compared with most healthy individuals of the same age.
April 7, 1981
Date of Patent:
January 17, 1984
James C. Conti, Elaine Strope, Eugene Findl, Cynthia Griffiths
Abstract: A collapsible respiratory exercising device for measuring the volume of air inhaled by the user. The device comprises a rigid upper plate, an orifice through the plate, an inhalation tube connected to the orifice, a tubular bellows attached beneath the plate and in communication with the orifice and tube, a lower plate attached to the lowermost end of the bellows which has sufficient mass to cause the bellows to fully expand, and measuring means with calibrated indicia attached to the upper plate for determining the change in volume of the bellows after inhalation, thereby indicating the amount of air that has been inhaled.
Abstract: In an exemplary embodiment, a magnetic field generator is arranged directly on the body or at an interval therefrom, and is designed in such manner that it generates a defined irregular field. For determining the field flux, a plurality of magnetic flux pick-ups with magnetic flux-dependent sensor elements are arranged on a carrier at an interval from one another in at least two, preferably in three, planes which stand perpendicular to one another. Moreover, the arrangement is executed in such manner that a free space is formed between the magnetic flux pick-ups corresponding to the intervals therebetween. The device is suited in particular for employment in dental medicine, and, namely, for the determination of lower jaw movements in a patient.