Patent ID: 7635359

Claim:
A receptacle for use with a medical suction device which is equipped with a rigid case for detachably holding and air-tightly surrounding at least a portion of said receptacle, and a patient-side tube for introducing waste liquid into said receptacle, and designed to create a negative pressure in both an interior space of said rigid case and an interior space of said receptacle so as to allow waste liquid to be sucked into said receptacle through said patient-side tube, said receptacle comprising: one port portion connected to said patient-side tube; a receptacle main body for holding waste fluid sucked through the port portion, said receptacle main body having a wall formed of sheets; and an air-pervious/liquid-impervious element having air perviousness and liquid imperviousness, said air-pervious/liquid-impervious element being provided in at least the portion of said receptacle main body, wherein said air-pervious/liquid-impervious element is adapted to discharge an air in the interior space of said receptacle to the interior space of said rigid case in response to the negative pressure created in the interior space of said rigid case, an outer peripheral portion of said port portion is detachably and air-tightly attachable to said rigid case, so that an entire region except for a part of said port portion is surrounded by said rigid case, said port portion includes a check valve adapted to allow waste liquid sucked from said patient-side tube to flow in, and prevents said waste liquid from flowing out to said patient-side tube, said receptacle main body has a folded portion that is located at a height position equal to or above said port portion in the state after said receptacle main body is held by said rigid case, and said folded portion being formed by folding sheets facing each other, and said air-previous/liquid-impervious element is located at a position below said port portion in the state after said receptacle main body is held by said rigid case, and a length of said receptacle main body in the state after said folded portion is expanded is set to be longer than said rigid case.