Abstract: A collapsible and deployable filter for blocking debris and passing blood in a blood vessel in a patient's body, the filter including; a framework of a flexible material, constructed to have a radially compressed state, in which the framework is radially compressed by radial deforming forces, and a radially expanded state to obdurate an artery; and a flexible filter material secured to said framework and having pores dimensioned to prevent the passage of debris therethrough while allowing the passage of blood. The filter has, in the radially expanded state of the framework, a generally conical or frustoconical form with a large diameter end, a small diameter end opposite to the large diameter end, and a side surface extending between the ends. The filter has an opening that is free of filter material at the small diameter end or in the side surface.

Abstract: A device for treating conditions causing obstructions in a body passage. The device is composed of: a first catheter dimensioned to be insertable into the body passage and having a lateral wall, a proximal end and a distal end; and a first balloon carried by the first catheter and extending outwardly from the lateral wall. The first catheter is provided internally with not more than three fluid conducting passages, including: a blood bypass flow passage extending at least from a first point located between the first balloon and the proximal end to a second point at the distal end and communicating at the first point with a region surrounding the first catheter; a balloon inflation passage communicating with the first balloon; and a delivery/aspiration passage opening at the lateral wall at a location between the first point and the first balloon.

Abstract: An external cardiac compression alarm system is disclosed comprising an inflatable balloon which may be inserted through the esophagus into the chest region of a patient undergoing cardiac arrest, said balloon being connected by a tube to a pressure gauge. The pressure gauge, in turn, is connected to a speaker which may emit two tones. There are two switches provided on the pressure gauge, one switch corresponding to a desired minimum degree of pressure to be exerted on the patient and the second switch corresponding to a desired maximum degree of pressure such that when the first switch is activated by the pressure gauge, the speaker emits one tone and when the second switch is activated, the speaker emits a second tone, thereby providing both audio and visual feedback immediately to a person performing external cardiac compression.