Position testing device

Claim 1

A position testing device for a patient's body, comprising: an elongated tubular member having a lumen, a proximal end, and a distal end for placement in the patient's body; and a body member having a proximal end, a distal end, an outer surface defining an exterior of the body member, a shallow dish-shaped cavity recessed from said outer surface and exposed to the atmosphere to receive a testing liquid, an elongated tubular section at the distal end of the body member and being releasably received in the proximal end of the tubular member, said body member having a passageway communicating between a first opening at an inner portion of said cavity and a second opening at the distal end of said tubular section such that the passageway communicates with the lumen of the tubular member through said second opening, said passageway intermediate said first and second openings incuding a substantially linear portion and being closed to the exterior of the body member, said passageway being unobstructed intermediate said openings to permit passage of fluid in opposite directions between said first and second openings, said body member being capable of orientation in a testing position while attached to the tubular member and while said passageway linear portion is in a generally horizontal configuration with the cavity being exposed in a generally vertical direction above the body member, said cavity tapering toward said first opening, said cavity having a height between said first opening and said outer surface substantially less than the length of said linear passageway portion, and said cavity having a maximum width adjacent said outer surface substantially greater than the maximum height of the cavity in said testing position, whereby the testing liquid indicates whether the tubular member communicates with a positive or negative pressure inside the patient's body.