Surgery – Truss – Pad
Patent
1982-10-28
1986-01-14
Howell, Kyle L.
Surgery
Truss
Pad
73631, A61B 1000
Patent
active
045640181
ABSTRACT:
An ultrasonic diagnostic scanner for obtaining ocular measurements is described. The ultrasonic diagnostic scanner generally comprises transmitter means for generating an ultrasonic signal, receiver means for receiving echo signals and for producing a peak signal at substantially the maximum amplitude of the echo signals when the echo signals exceed a predeterminable threshold level, programmable means for producing count signals indicative of the times between the transmission of the ultrasonic signal and the occurrence of a selected number of peak signals, and between the occurrence of predetermined peak signals, microcomputer means for controlling the transmitter and programmable means, and output means for generating a perceptible output indicative of the ocular parameter being measured. The ultrasonic diagnostic scanner also includes sensitivity adjustment means for maintaining a predetermined amplitude level of at least one of the echo signals under the control of the microcomputer means. Threshold adjustment means is also provided for adjusting the predeterminable threshold level under the control of the microcomputer means. A dot matrix liquid crystal display is also included for visually displaying an echo histogram of the echo signals.
REFERENCES:
patent: 4154114 (1979-05-01), Katz et al.
patent: 4261367 (1981-04-01), Freese
Storz Corneo-Scan Ultrasonic Pachymeter, Storz Instrument Company, 1982 Model CS1000.
Storz Compu-Scan Biometric Ruler, Storz Instrument Company, revised 5/82 Model U2020.
Kremer, F. B. et al., "Apparatus and Method for Performing Corneal Surgery," International Publ. No. WO82/02485, publ. Aug. 5, 1982.
Hutchison Stephen
Ritter J. Alan
Virkus Mark
Howell Kyle L.
Jaworski Francis J.
Storz Instrument Company
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