US4558708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Patient's airway adapter to withdraw a patient's gas samples for testing free of sputum mucus and/or condensed water, by utilizing a hollow cylindrical hydrophobic liquid baffle
Assignee: BIOCHEM INTERNATIONAL Inc W238 N1650 ROCKWOOD DRIVE WAUKESHA WISCONSIN 53186 A CORP OF DELAWARE
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Filing: 1984-10-24
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Granted: 1985-12-17
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Expires: 2004-10-24
Abstract
Abstract A patient's airway adapter is fitted into a patient's airway, which is a combined breathing air supply and exhaust gas fluid flow passageway. The housing of this patient's airway adapter connects directly to a standard tapered tracheostomy or endotracheal tube connection or standard tapered portions of other fittings, and in turn provides a standard tapered connection to a patient's airway. The main air and gas stream, respectively, going to and from a patient, continues to flow directly through the patient's airway adapter. Samples of the patient's gas are withdrawn through a smaller diameter sampling exhaust port in the housing. The sampled patient's gas, immediately upon leaving the main air and gas stream, passes from the interior of a hollow cylindrical hydrophobic liquid baffle, through the baffle, and then into the sampling cannula enroute to a monitor. This hydrophobic baffle is held in a sealed position within the surrounding housing. Any mucus, sputum, and/or condensed water is kept from entering the smaller diameter sampling exhaust port, and therefore from entering the sampling cannula, as it collects on the inside of a cylindrical hydrophobic liquid baffle. The hydrophobic baffle material is a hydrophobic, hollow cylindrical baffle, having an unobstructed internal diameter in all embodiments.
Inventors
- 👤 Lawrence L. Labuda
- 👤 Daniel W. Knodle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:34
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/08; A61M16/0816; A61M16/0833; A61M16/0841; A61M16/085; A61M2205/00; A61M2205/75; A61M2205/7536
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
229 words
A patient's airway adapter to withdraw a patient's gas samples from a patient's airway for testing in a respiratory monitor, free of sputum, mucus, and/or condensed water, comprising: (a) a housing having: an interior to continue the patient's airway passageways extending between a patient and respiratory sustaining equipment; a centered flow through interior receiving chamber within the interior of the housing to receive a hydrophobic membrane type liquid blocking but gas passing baffle; a passageway extending essentially radially outwardly through the housing from the centered flow through interior receiving chamber; a connector portion on this passageway extending through the housing, to receive a patient's gas sampling cannula; respective connector portions on the housing adapted to interfit with endotracheal or tracheal tubes or other airway components extending to a patient; respective connector portions on the housing adapted to interfit with tubes or other airway components extending to respiratory sustaining equipment; and (b) a hollow cylindrical hydrophobic membrane type baffle received in the centered flow through interior receiving chamber within the interior of the housing: to continue the interior of the patient's airway passageway; to block the radial passage of sputum, mucus, and/or water; and to allow the radial passage of the patient's gas through this hollow cylindrical hydrophobic membrane type baffle, through the radial passageway of the housing and beyond through a patient's gas sampling cannula to a respiratory monitor.
Claim 2
Dependent Claim
229 words
A patient's airway adapter to withdraw a patient's gas samples from a patient's airway for testing in a respiratory monitor, free of sputum, mucus, and/or condensed water, comprising: (a) a housing having: an interior to continue the patient's airway passageways extending between a patient and respiratory sustaining equipment; a centered flow through interior receiving chamber within the interior of the housing to receive a hydrophobic membrane type liquid blocking but gas passing baffle; a passageway extending essentially radially outwardly through the housing from the centered flow through interior receiving chamber; a connector portion on this passageway extending through the housing, to receive a patient's gas sampling cannula; respective connector portions on the housing adapted to interfit with endotracheal or tracheal tubes or other airway components extending to a patient; respective connector portions on the housing adapted to interfit with tubes or other airway components extending to respiratory sustaining equipment; and (b) a hollow cylindrical hydrophobic membrane type baffle received in the centered flow through interior receiving chamber within the interior of the housing: to continue the interior of the patient's airway passageway; to block the radial passage of sputum, mucus, and/or water; and to allow the radial passage of the patient's gas through this hollow cylindrical hydrophobic membrane type baffle, through the radial passageway of the housing and beyond through a patient's gas sampling cannula to a respiratory monitor.
Claim 3
Dependent Claim
134 words
A patient's airway adapter, as claimed in claim 1, wherein the housing is made of two pieces, one piece, serving as a baffle receiving piece, has: a centered flow through externally tapered receiver serving as a respective connector portion adapted to interfit with endotracheal or tracheal tubes or other airway components; a transverse radially positioned standard Luer connector serving as the connector portion to receive a patient's gas sampling cannula; a top circular shouldered entry to receive the other piece designated as a baffle securing piece; and the centered flow through interior receiving chamber, having in turn: a foot receiving internal circular abutment; and a shoulder receiving internal, circular abutment, which is axially adjacent to the top circular shouldered entry; whereby the abutments both serve to receive the hollow cylindrical hydrophobic membrane type baffle.
Claim 4
Dependent Claim
85 words
A patient's airway adapter, as claimed in claim 2, wherein the other piece of the housing, serving as a baffle securing piece, has: a top centered flow through internally tapered receiver, serving as a respective connector portion adapted to interfit with tubes or other airway components extending to respiratory sustaining equipment; a circular retaining shoulder near its bottom to bear against the hollow cylindrical hydrophobic membrane type baffle; and a circular rim to fit inside the top circular shouldered entry of the baffle receiving piece.
Claim 5
Dependent Claim
135 words
A patient's airway adapter, as claimed in claim 3, wherein the hollow cylindrical hydrophobic membrane type baffle has: a foot portion to abut the foot receiving internal circular abutment of the baffle receiving piece of the two piece housing; a top shoulder portion to contact and to rest upon the shoulder receiving internal circular abutment of the baffle receiving piece; and a circumferential recessed exterior portion located between this foot portion and this top shoulder portion; which after installation of this baffle in this baffle receiving piece, forms a cylindrical ring collecting chamber in conjunction with the interior of this baffle receiving piece, whereby the patient's gas, essentially free of moisture, is collected in ample quantity to supply the radial flow of the patient's gas through the patient's gas sampling cannula to a respiratory monitor.
Claim 6
Dependent Claim
64 words
A patient's airway adapter, as claimed in claim 4, wherein, after the placement of the hollow cylindrical hydrophobic membrane type baffle into the baffle receiving piece of the housing and the subsequent interfitting of the baffle securing piece of the housing against this baffle and partially within the baffle receiving piece of the housing, then these two pieces of the housing are bonded together.
Claim 7
Dependent Claim
21 words
A patient's airway adapter, as claimed in claim 5, wherein the two piece housing is molded using high impact polystyrene material.
Claim 8
Dependent Claim
25 words
A patient's airway adapter, as claimed in claim 6, wherein the hollow cylindrical hydrophobic membrane type baffle is molded using a high density polyethylene material.
Claim 9
Dependent Claim
30 words
A patient's airway adapter, as claimed in claim 7, wherein the high density polyethylene material has micron pore sizes selected in a range of five to thirty micron pore sizes.
Claim 10
Dependent Claim
21 words
A patient's airway adapter, as claimed in claim 7, wherein the high density polyethylene material has a fifteen micron pore size.
Claim 11
Dependent Claim
63 words
A patient's airway adapter, as claimed in claim 1, wherein the exterior of the hollow cylindrical hydrophobic membrane type baffle and the centered flow through interior receiving chamber within the interior of the housing are complementary formed to create a collecting chamber for the patient's gas in an ample quantity to keep the patient's gas sampling cannula full during a respiratory monitoring period.
Claim 12
Dependent Claim
64 words
A patient's airway adapter, as claimed in claim 1, wherein the hollow cylindrical hydrophobic membrane type baffle has an exterior circumferential recessed portion, which together with the centered flow through interior receiving chamber within the interior of the housing, forms a collecting chamber for the patient's gas in an ample quantity to keep the patient's gas sampling cannula full during a respiratory monitoring period.
Claim 13
Dependent Claim
69 words
A patient's airway adapter, as claimed in claim 1, wherein the hollow cylindrical hydrophobic membrane type baffle has an exterior circumferential recessed portion, and the centered flow through interior of the housing has an interior circumferential recessed portion, and these circumferential recessed portions together form this collecting chamber of the patient's gas in an ample quantity to keep the patient's gas sampling cannula fall during a respiratory monitor period.
Claim 14
Dependent Claim
34 words
A patient's airway adapter as claimed in claim 1 comprising in addition integral portions of the patient's airway circuit, thereby making the patient's airway adapter housing an integral part of the patient's airway circuit.
Claim 15
Dependent Claim
40 words
A patient's airway adapter, as claimed in claim 1, comprising in addition integral portions of a tee connection used in the patient's airway circuit, thereby making the housing of the patient's airway adapter an integral part of this tee connection.
Claim 16
Dependent Claim
40 words
A patient's airway adapter as claimed in claim 1, comprising in addition integral portions of a Y connection used in the patient's airway circuit, thereby making the housing of the patient's airway adapter an integral part of this Y connection.
Claim 17
Dependent Claim
44 words
A hollow cylindrical hydrophobic membrane type baffle to continue the interior passageways of tubes of a patient's airway and to block the radial passage of sputum, mucus, and/or water, while allowing the radial passage of a patient's gas sampling cannula to a respirator monitor.
Claim 18
Dependent Claim
44 words
A hollow cylindrical hydrophobic membrane type baffle to continue the interior passageways of tubes of a patient's airway and to block the radial passage of sputum, mucus, and/or water, while allowing the radial passage of a patient's gas sampling cannula to a respirator monitor.
Claim 19
Dependent Claim
49 words
A hollow cylindrical hydrophobic membrane type baffle, as claimed in claim 16, wherein an outer circumferential recessed portion is formed in the baffle to create a collecting volume for an ample quantity of a patient's gas to keep a patient's gas sampling cannula full during a respirator monitoring period.
Claim 20
Dependent Claim
42 words
A hollow cylindrical hydrophobic membrane type baffle, as claimed in claim 16, wherein a high density polyethylene material is used as the baffle material in a range of five to thirty micron pore sizes, with a fifteen micron pore size being preferred.
Claim 21
Dependent Claim
42 words
A hollow cylindrical hydrophobic membrane type baffle, as claimed in claim 17, wherein a high density polyethylene material is used as the baffle material in a range of five to thirty micron pore sizes, with a fifteen micron pore size being preferred.
References Cited (Backward Citations)
US3330271A
Cited
US3631654A
Cited
US3544273A
Cited
US3667475A
Cited
US3910261A
Cited
US4090513A
Cited
US4356012A
Cited
US4298358A
Cited
US4406291A
Cited
US4327718A
Cited
US4393378A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-12-16 | 1989-06-17 | 1989-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-16 | 1993-06-17 | 1993-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-16 | 1997-06-17 | 1997-12-17 | $7700.00 | Window Closed / Lapsed |