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US 6,631,286 B2Granted
Device for the determination of tissue perfusion and operative use thereof
AssigneePulsion Medical Systems AG
InventorsUlrich J. Pfeiffer, Andreas Becker, Norbert Eder, Thorsten Burger, Christian Töns
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Abstract
A safety housing, into which an infrared laser light source is integrated together with the CCD camera, forms a compact unit for the determination of tissue perfusion. Rays from the infrared laser light source radiate the area of operation and indocyanin green, previously injected intravenously into the patient, is excited to fluorescence by the radiation, which is detected by the CCD camera.
Claims25
A device for the determination of tissue perfusion in applications in which the wearing of safety glasses would constitute a hindrance, said device including:
- a radiation source, said source generating an electromagnetic bundle of rays in a wavelength range corresponding to the wavelength range of the fluorescence excitation of a chromophore;
- an optical expansion unit;
- a safety housing;
- and
- an electronic camera with an optical filter, said filter being transparent to emitted light of the excited chromophore and opaque to the wavelength range of said generated bundle of rays;
- wherein said radiation source and said optical expansion unit are integrated into said safety housing adapted to allow only an expanded bundle of rays with an intensity not exceeding a limit value that excludes any risk to persons present in the vicinity of the device, to emerge from said safety housing, and said optical expansion unit enables the illumination of an operating area sufficiently large for non-microinvasive procedures.
3 more elements
Dependencies are inferred from the claim text.