Device and method for the removal of body substances

Details Device and method for the removal of body substances Device and method for the removal of body substances

1998-04-08

2000-02-22

Smith, Jeffrey A.

Surgery

Instruments

Light application

606 10, 606 11, 606170, 606171, A61B 1736, A61B 1732

Patent

active

06027493&

ABSTRACT:
An appliance for the removal of body substance, in particular an ophthalmological vitrectomy device, uses a mechanical cutting edge or laser radiation (18) for detaching vitreous body material. Detached parts of vitreous body material (22) are suctioned off by an aspiration cannula (10). To avoid traction in the vitreous body material (12), a control system (C) for the time sequence, energy and length of the laser pulses (18) and for the suction pump (P) is provided. The control is effected in such a way that a volume (22) of vitreous body material suctioned through the opening (14) is in each case detached free of traction, by one or more laser pulses, from the remaining vitreous body material (12) located in the eye, before a further volume of vitreous body material is suctioned in. The exit direction of the laser beam pulses (18) from the radiation conductor (16) is transverse to the aspiration direction.

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R. Kloti, "Glaskorperverlust--weniger gefahrlich mit dem Mikrostripper", Klin. Mbl. Augenheikunde (1982); 120: 447-450.
Jeffrey W. Berger, Thomas W. Bochow, Jonathan H. Talamo, Donald J. D'Amico, "Measurement and Modeling of Thermal Transients During Er:YAG Laser Irradiation of Vitreous", Lasers in Surgery and Medicine 19: 388-396 (1996).
H. Buttner, R. Machemer, "Erkrankungen am Glaskorper des Auge4s sind heilbar", Umschau, 1974, Bd. 74. Heft 22, S. 716-717.

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