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[Venous pressure in the expulsive hemorrhages and loss of the vitreous (author's transl)].

It is insisted in the importance of the rising venous pressure as a cause of concause of the loss of the vitreous and the expulsive hemorrhages. We remind a simple way of measuring the venous pressure clinically and we recommend the inclined position of the patient as a prophylactic way to avoid the venous hyperpressure. While we do not have the operative tables that allow us to perform that inclination as low as oculists are used to operate sitting and with microscope, we suggest a simple way to obtain the inclination in a common low stretcher, with a triangular pillow. Some details are also advised, so the general anesthesia does not rise the venous pressure. The article specially pointing out the importance of the venous pressure, expressely omits the reminding of the surgical rules assigned to prevent the vitreous complications, because they are already known and exposed by the authors in other publications.