Patent ID: 9095675
Filing Date: 2015-08-04
Classification: A61M,B01D

Abstract:
1. A filter to be used in an expiratory branch of a ventilator, comprising: a housing arranged with an inlet passage and an outlet passage; a dividing wall arranged inside said housing, dividing the interior of the housing in two compartments, one in communication with the inlet passage and one in communication with the outlet passage, which compartments are capable of collecting condensate on either side of the dividing wall; an opening arranged in the dividing wall; a main viral/bacteria filter element arranged in the compartment that is in communication with the outlet passage such that it is not contacting collected condensate, and attached to one side of the dividing wall along the edges of the opening; and a pre-filter member arranged in the compartment that is in communication with the inlet passage such that it is not contacting collected condensate, and placed in the opening in the dividing wall before said main filter element as seen in the flow direction, wherein the pre-filter comprises an air permeable material capable of collecting medicament droplets in the air stream through said main filter element, wherein said pre-filter member has a flexible foam meshed structure to provide a low pressure drop over the pre-filter.