One-use device for directly taking a sample of expired air from a subject
First Claim
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1. One-use device for directly taking a sample of expired air from a subject, comprising, in combination:
- a rigid recipient (1), whose volume corresponds to that desired of the sample to be taken;
a stopper (3) adapted to take two axial positions on the recipient (1), ensuring obturation of an upper, open part thereof in one or the other of the two positions, which stopper is fast with a lateral tube (3c) whose inner opening is obturated by a wall of the recipient when said stopper has been brought to a lower axial position of seal;
a cannula (6) engaged to slide axially in the lateral tube (3c), the subject blowing into one of the ends of this cannula, while an opposite end which opens freely in the recipient (1) is provided with a blind, annular, projecting stop (7);
an evacuation pipe (10) of which the opening in the lateral tube (3c) is obturated by the blind annular stop (7) of the cannula (6) once the cannula has been displaced axially by an operator pulling;
and a control volume (11, 12,
13) which is connected to the free end of the evacuation pipe (10) and which is arranged to indicate to the operator that a sufficient volume of expired air has passed through and scavenged the recipient (1).
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Abstract
An apparatus to directly take a sample of expired air from a subject which utilizes a stopper (3) with two distinct position. When the stopper (3) is in the upper position, it allows air blown in via the cannula (6) to scavenge the interior space of the tube (1) until the control (11,12, or 13) has indicated a sufficient volume. The cannula (6) is then pulled by the operator so that a blind stop (7) obturates the opening of an evacuation pipe (10) connected to the control. The stopper is then moved to a lower position to seal the sample of air in the tube (1).
27 Citations
8 Claims
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1. One-use device for directly taking a sample of expired air from a subject, comprising, in combination:
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a rigid recipient (1), whose volume corresponds to that desired of the sample to be taken; a stopper (3) adapted to take two axial positions on the recipient (1), ensuring obturation of an upper, open part thereof in one or the other of the two positions, which stopper is fast with a lateral tube (3c) whose inner opening is obturated by a wall of the recipient when said stopper has been brought to a lower axial position of seal; a cannula (6) engaged to slide axially in the lateral tube (3c), the subject blowing into one of the ends of this cannula, while an opposite end which opens freely in the recipient (1) is provided with a blind, annular, projecting stop (7); an evacuation pipe (10) of which the opening in the lateral tube (3c) is obturated by the blind annular stop (7) of the cannula (6) once the cannula has been displaced axially by an operator pulling; and a control volume (11, 12,
13) which is connected to the free end of the evacuation pipe (10) and which is arranged to indicate to the operator that a sufficient volume of expired air has passed through and scavenged the recipient (1). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification