Method and apparatus for conveniently setting a predetermined volume for re-breathing
First Claim
1. A device for calibrating a volume of a variable-length tubing loop for re-breathing use in a respiratory circuit, comprising:
- a card of substantially inelastic material comprising;
a first face;
a second face;
a first end configured for affixation with respect thereto of a portion of a tubing loop extending over one of the first face and the second face of the card;
a second end remote from the first end; and
a plurality of template indicia marked on said first face of said card between the first end and the second end corresponding to a plurality of volumes to which said tubing loop may be adjusted by adjustment of tubing loop length.
6 Assignments
0 Petitions
Accused Products
Abstract
The present invention provides a method and device for conveniently setting the volume of a variable-length tubing loop used in a re-breathing circuit to various selected predetermined values. The device includes a card of an inelastic, disposable material which is attachable to a portion of the tubing loop or adjacent structure and which has marked on it several positions to which the tubing loop can be extended to set the volume of the loop at selected predetermined values. The card is preferably formed of a substantially rigid material which may be configured to fold around the tubing loop and adjacent structures to provide support and protection during shipping and handling of the device. The card may include instructions for use of the tubing loop printed on an outer surface thereof. Some or all of the card may be detachable from the tubing loop so that once the desired tubing volume is set, all or a portion of the card may be removed and disposed of.
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Citations
23 Claims
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1. A device for calibrating a volume of a variable-length tubing loop for re-breathing use in a respiratory circuit, comprising:
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a card of substantially inelastic material comprising;
a first face;
a second face;
a first end configured for affixation with respect thereto of a portion of a tubing loop extending over one of the first face and the second face of the card;
a second end remote from the first end; and
a plurality of template indicia marked on said first face of said card between the first end and the second end corresponding to a plurality of volumes to which said tubing loop may be adjusted by adjustment of tubing loop length. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A volume-adjustable tubing loop and valve assembly for use in facilitating re-breathing by a patient, comprising:
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a valve;
a patient-end connection extending from said valve assembly;
a respiratory circuit-end connection extending from said valve assembly;
a tubing loop comprising a length of variable-length tubing attached at each of its ends to said valve;
an elongated structure attached proximate a first end thereof to said valve and extendable therefrom adjacent and substantially parallel to said tubing loop, and having marked thereon a plurality of indicia indicating positions to which said tubing loop may be extended over said elongated structure to obtain specified internal tubing volumes associated with said indicia. - View Dependent Claims (18, 19, 20, 21)
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22. A method of setting the length of a variable-length tubing loop for use in a ventilation circuit, comprising the steps of:
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fixing a portion of said tubing loop with respect to a structure bearing a plurality of templates, each said template of said plurality indicating a tubing loop length corresponding to an associated volume; and
adjusting said tubing loop length to substantially match one of said templates. - View Dependent Claims (23)
removing said template-bearing structure from proximity with said tubing loop after said tubing loop has been adjusted to a length indicated by a template.
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Specification