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WO1994017848A1 - Dispositif de voie respiratoire artificielle - Google Patents

Dispositif de voie respiratoire artificielle Download PDF

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Publication number
WO1994017848A1
WO1994017848A1 PCT/GB1993/000578 GB9300578W WO9417848A1 WO 1994017848 A1 WO1994017848 A1 WO 1994017848A1 GB 9300578 W GB9300578 W GB 9300578W WO 9417848 A1 WO9417848 A1 WO 9417848A1
Authority
WO
WIPO (PCT)
Prior art keywords
skirt
rim
formation
ring
plane
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/GB1993/000578
Other languages
English (en)
Inventor
Archibald Ian Jeremy Brain
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US08/003,900 external-priority patent/US5305743A/en
Application filed by Individual filed Critical Individual
Priority to AU39582/93A priority Critical patent/AU785501B2/en
Priority to CA002155112A priority patent/CA2155112C/fr
Publication of WO1994017848A1 publication Critical patent/WO1994017848A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/0033—Moulds or cores; Details thereof or accessories therefor constructed for making articles provided with holes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
    • A61M16/04—Tracheal tubes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
    • A61M16/04—Tracheal tubes
    • A61M16/0402—Special features for tracheal tubes not otherwise provided for
    • A61M16/0409—Special features for tracheal tubes not otherwise provided for with mean for closing the oesophagus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C37/0003—Discharging moulded articles from the mould
    • B29C37/0007—Discharging moulded articles from the mould using means operable from outside the mould for moving between mould parts, e.g. robots
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/753—Medical equipment; Accessories therefor
    • B29L2031/7546—Surgical equipment

Definitions

  • This invention relates to an artificial airway device to facilitate lung ventilation in an unconscious patient, and more specifically to such a device designed for placing in the oropharynx of the patient in order to prevent airway obstruction, to permit either spontaneous or controlled ventilation and to prevent the inhalation into the lungs of extraneous matter such as blood.
  • an endotracheal tube which is a flexible tube of rubber or plastics, usually with an inflatable cuff around the distal end.
  • an oro- or naso-pharyngeal airway may be used, which is a flexible tube extending from the mouth or nose into the pharynx but not into the larynx, and which, unlike the endotracheal tube, is used in conjunction with a face mask. While preventing obstruction of the airway by the tongue, the oro- or naso-pharyngeal airway cannot conveniently be used for controlled ventilation and does not prevent inhalation of extraneous matter.
  • the endotracheal tube is introduced through the larynx into the trachea or windpipe, whereupon the cuff is inflated through a small auxiliary tube to seal against the wall of the trachea.
  • Introduction of the endotracheal tube is a skilled operation normally requiring use of a laryngoscope to guide the tube through the larynx, past the vocal cords and into the trachea.
  • the tube or the laryngoscope may cause damage to soft tissues or to the sensitive structures of the larynx. It is not always possible to see the larynx, making intubation difficult or impossible in some patients.
  • My British Patent Specification No. 2111394B describes an artificial airway device comprising a curved or flexible tube and a mask portion carried at one end of the tube.
  • the mask portion has a flexible annular peripheral formation which may be inflatable and which surrounds a hollow interior space or lumen of the mask portion.
  • Said annular peripheral formation of the mask portion is pre-formed with a roughly elliptical shape so as to be capable of conforming to, and of fitting readily within, the actual and potential space behind the larynx, thereby forming a seal around the circumference of the laryngeal inlet without having the device penetrate into the interior of the larynx.
  • the tube opens into the lumen of the mask portion to provide the airway, with the axis of the tube at an acute angle to the general plane of the annular peripheral formation and substantially aligned with the major axis of the roughly elliptical shape of the annular peripheral formation of the mask portion.
  • the device thus constitutes a laryngeal mask.
  • GB 2,205,499B in which there are provided two flexible cross-bars extending across the aperture in the peripheral annular flexible formation. These bars preferably extend substantially parallel with the major axis of the generally elliptical annular formation. As this patent explains, the parallel bars serve to prevent the epiglottis from blocking the airway passage of the mask.
  • the peripheral seal formation is an inflatable annulus which, when inflated, is a generally elliptical toroi-d.
  • Its manufacture presents difficulties, in that the process uses a so-called "floating core" within the outer or female part of the mould. This core is supported by a relatively small pin which ultimately defines the bore of the inflation inlet but which must maintain uniform spacing from the adjacent wall surface of the female mould.
  • the wall of the moulded annulus be uniformly thin 1 , for example, a selected single thickness in the range 0.4 to 1.0 mm, preferably 0.7 mm.
  • a further disadvantage of the existing manufacturing process is that it is highly labor-intensive, since the tubular airway portion of the device to which the peripheral annular formation is attached must be connected via a third part, or back plate.
  • This third part is separately moulded and forms an appropriate shape at one end to fit within the peripheral annular formation and at the other end to receive the tubular airway portion of-the device.
  • the back plate and the cut inner periphery of the inflatable ring must be so adhesively secured as to complete the inflatable integrity of the ring as well as the sealing effectiveness of the back plate to the inflatable ring.
  • the primary object of the present invention is to provide a manufacturing process which will avoid the unwanted movement of the mould core, thus permitting the manufacture of a peripheral annular formation with a significantly thinner wall, with greater precision and at lower cost.
  • Another object is to meet the above object with a process which lends itself to integrally connected moulding of the inflatable ring and back plate components of the mask in a single operation.
  • a further object is to meet the above objects with a process which further lends itself to integrally formed provision for an oesophagus-drainage feature in the mask structure.
  • the invention achieves these objects by providing a mould which is designed to produce a peripheral annular formation substantially identical to that described in my UK
  • Patent No. GB 2,205,499B but in an inverted form.
  • the moulded part must therefore be inverted before it takes up the desired shape.
  • This inversion is readily achieved provided the part is manufactured from flexible plastic or rubber material or any material which will permit inversion by virtue of its flexibility.
  • the advantage of manufacturing the peripheral annular formation in its inverted form is that the core of the mould required to form this shape does not "float" because, instead of being fixed in place by a relatively small pin, it has a large surface of attachment to remaining parts of the mould. This makes it possible to manufacture the inflatable part with a much thinner and more precisely formed wall since variations in wall thickness are less likely to occur.
  • a further possibility offered by the technique is the use of the core to form the inverted component by a dip-moulding process, in which the core only is dipped into the plastics or rubber material, in liquid form.
  • the second-stated object of the invention is realized by eliminating the need for a separate back plate part, in that the moulded back plate is an integral part of the peripheral annular formation.
  • Fig. 1 is a simplified view in perspective, showing a two-piece laryngeal mask of the invention, fitted to the distal end of an airway tube, the aspect being from the upstream or pharyangeal-cavity side of the mask;
  • Fig. 2 is a side view in perspective for a first moulded component part of the mask of Fog. 1, portions being broken away and in section, wherein the section plane is the vertical plane of symmetry of the component part;
  • Fig. 2A is a sectional view of a second component part of the mask of Fig. 1, the section plane being the same vertical plane of symmetry as in Fig. 2;
  • Fig. 3 is a perspective view of the moulded component part of Fig. 2 after inverting the lower portion thereof, the aspect being from the downstream or laryngeal side of the mask;
  • Fig. 4 is a simplified section through a mould for making the component part of Fig. 2;
  • Fig. 4 is a section in the vertical plane of symmetry as in Fig. 4, to show a slightly modified moulding-core element for use in a modified process for making the mask of Fig. 1;
  • Fig. 4B is vertical section in the plane of symmetry of Fig. 4A, and showing the product of moulding pursuant to Fig. 4A, in assembled relation to the back-plate component of Fig. 2A;
  • Fig. 5 is a side view in elevation showing a one-piece laryngeal mask of the invention, fitted to the distal end of an airway tube, a portion being broken-away and in section, wherein the section plane is the vertical plane of symmetry of the mask;
  • Fig. 6 is a view similar to Fig. 2, specific to the laryngeal mask of Fig. 5;
  • Fig. 7 is a view similar to Fig. 4, specific to the mask of Fig. 5;
  • Fig. 8 is a side view in elevation showing another laryngeal mask of the invention, fitted to the distal end of an airway tube, a portion being broken-away and in section, wherein the section plane is the vertical plane of symmetry of the mask;
  • Fig. 9 is a view similar to Figs. 2 and 6, but specific to the laryngeal mask of Fig. 8;
  • Fig. 10 is a view similar to Figs. 4 and 7, but specific to the laryngeal mask of Fig. 8.
  • the invention is shown in application to an inflatable/ deflatable laryngeal mask 10 fitted to the distal end of an airway tube 11, which will be understood to be relatively non-compliant and shaped for manipulated entry of mask 10 into intended position within a patient's pharyngeal cavity, with the proximal end of tube 11 accessible for ventilation via or outside the patient's mouth.
  • the mask 11 comprises a first moulded inflatable/deflatable part (Figs. 2 and 3) and a second moulded part or back plate 12 (Fig. 2A) .
  • a peripheral inflatable/deflatable element or ring 13 which is toroidal and generally elliptical, wherein the distal end 14 is more pointed and the proximal end 15 is more rounded, in general conformance with similar features of the flat base rim 16 of back plate 12.
  • the more pointed distal end will be understood to be for engagement with and location of the laryngeal mask via the oesophageal inlet, when the elliptical annulus 13 is poised for inflation, via a suitable air-supply line connection 17 at the proximal end of the annulus.
  • a flexible membrane 18 closes the lumen of the mask, all except for a passage established by plural adjacent openings which define longitudinal bars 19 between openings, for preventing the epiglottis from blocking the airway passage of the mask.
  • such outer elements are shown to comprise: a base 21 to which core 20 can be secured as by bolt means 22; right and left separable parts 23, 24, which will be understood to be clampable to each other and to plate 21 (by means not shown) but to be accurately located as by dowel pins 25; and a threaded removable pin 26 which enters a local bore 27 in core 20, in order to integrally form the air-supply feature 17.
  • this intermediate product comprises a thin-walled skirt 30, depending from an essentially flat but thicker annulus or flange 31, to the upper inner edge of which a thin-walled shallow dome (flexible membrane 18) effectively closes the lumen within annulus 31, all except for the plural apertures which define longitudinal bars or strips 19 near the proximal end of dome 32.
  • the skirt 30 is characterized by a peripherally continuous lower rim 33 of essentially the same peripheral extent as the outer edge of 1 annulus 31.
  • the moulded skirt 30 features a peripherally continuous radially outward convex bulge 34 which becomes concave near its juncture with annulus 31 and near the lower rim 33; in the case of the upper concave portion 35, juncture with annulus 31 is virtually normal to the plane of annulus 31, and in the case of the lower concave portion 36, termination at rim 33 is virtually normal to the geometric lower plane defined by rim 33.
  • the moulded longitudinal or major-axis span S-* of the lower end of skirt 30 is substantially equal to or less than the corresponding span S 2 between major-axis limits of the upper surface of annulus 31.
  • a radially short outward flange formation 37 is a feature of rim 33, resulting from a local mould-cavity feature 37' in the mould of Fig. 4, the same being adjacent to and defined in part by the flat upper surface of the mould base 21.
  • the radially outer, upper edge of annulus 31 is notched to define a ledge 38 into which flange formation 37 can fit when skirt 30 is flexibly inverted or reversed so as to convert the convex bulge 34 into an outer concave contour which is smoothly contiguous to the concave portions 35 and 36, thereby resulting in virtual completion of the inflatable ring 13 of the mask of Fig. 1.
  • moulded apertures are shown in Fig. 4 to result from local rounded or ridge-like projecting formations, as at 29 in core 20.
  • Projections 29 will be understood to feature outer-surface convex contouring that conforms precisely to concave contouring of the outer-mould cavity, to and against which projections 29 fit and abut, upon proper mould closure.
  • mould- core (20) structure offers stabilizing reference to outer- mould structure (e.g., 23) for assurance of uniformly thin development of the moulded skirt 30 which must ultimately be reversed to define inflatable ring 13.
  • sprue material will readily part company from the thick wall of flange 31, and if such parting leaves a slight upwardly projecting fragment, such fragment will be exposed to view for visual spotting and ready removal, suitably after mould parts 23, 24, 26 have been removed and while the intermediate product of Fig. 2 remains unstripped from core 20.
  • a burr-equipped portable drill is a satisfactory tool for cleaning off any remnant sprue projection, and also for cleaning off any flashing or the like that may be observed at openings of membrane 18.
  • the moulded product is quickly and safely removed and is ready for the simple step of inversion, placing flange 37 into engagement or near-engagement at the peripheral notch 38 of flange 31.
  • the engageable surfaces of flanges 37 and 31 will have been first coated with suitable silicone adhesive, in readiness for adhesive completion of ring 13 upon reversal of the skirt 30, as above described.
  • the thus-reversed intermediate product of Fog. 2 will then have the appearance depicted in Fig. 3, as seen from the laryngeal-inlet side.
  • Fig. 1 The mask of Fig. 1 is then completed by assembling the separately moulded plate component 12 (Fig. 2A) thereto.
  • This component 12 is seen to be of thicker wall structure than skirt 30 and is therefore less compliant, although it may be moulded from the same silicone-rubber material as is the intermediate product of Fig. 2.
  • Its bottom surface 16 is a flat generally elliptical annulus, conforming to the profile of the flat upper surface of flange 31 and extending slightly beyond so as to additionally lap the flat underside of skirt flange 37, after skirt 30 reversal and assembly to notch 38.
  • a bead of silicone adhesive in the peripherally continuous groove 42 established by the adjacency of (a) the outer exposed generally elliptical limiting contour of plate 12 and (b) the now-inverted but previously lower rim of skirt 30.
  • the designation 42 in Fig. 1 will be understood to designate such a bead, which becomes a fillet between adjacent exposed surfaces of plate 12 and ring 13; as described more fully in my copending U.S. patent application Ser. No. 922,132, filed July 30, 1992, such a fillet aids in the desired collapse of ring 13 when evacuated for ease of insertion of the mask of Fig. 1 into and removal of the same from a patient.
  • Figs. 4A and 4B illustrate a simplified technique for manufacture of the described intermediate product, using essentially only the core piece 20 of Fig. 4.
  • the core piece 20' will be recognized as being identical to core piece 20, with the single exception that a threaded plug 44 has been engaged to a tapped hole at the base end of the bore 27 which will ultimately define the inflation/ deflation connection 17.
  • the point of Fig. 4A is that the depicted core piece 20' lends itself to so-called dip-moulding, namely, by manipulating core 20' via its base-mounting 21' such that it is inverted and dipped into a pool of liquid moulding material of appropriate viscosity.
  • the back-plate formation 50 is integrally moulded to and as part of the same process as that in which the skirt (Fig. 6) and its inflation/deflation connector 17 are formed, prior to inversion to establish a peripherally continuous inflatable ring 51.
  • the completed laryngeal mask (Fig. 5) is functionally the equivalent of the mask of Fig. 1 and is shown connected in the same way to airway tube 11 and to the supply tubing 41 for inflation/deflation of the inflatable ring 51.
  • the mould of Fig. 7, which enables one-step moulding of the entire mask of Fig. 5, is seen to comprise a core 52 having a large area base that is securely referenced to a flat outer-mould base 53 and retained as by bolt means 54.
  • the outer components of the mould are simplified to show establishment of a single cavity in outer-mould structure 55, supplied as by injection of liquid moulding material via one or more sprue passages, suggested at 56.
  • the back-plate portion 50 of the intermediate moulded product of Fig. 6 is seen to be of greater thickness than the uniformly thin flexible wall of the skirt formation 57 which integrally depends from the geometrical plane of juncture with back-plate 50; in Figs. 6 and 7 this geometrical plane is identified 58-58.
  • Features of skirt formation 57 may be identical to those of skirt 30 in Fig. 2. Therefore, the same reference numerals have been repeated for skirt 57 in Fig. 6 and for mould-cavity skirt-forming features in Fig. 7.
  • the mould-cavity profile 59 is seen to account for essentially the same back-plate external profile at 50 as for the separately moulded part of Fig. 2A.
  • a peripherally continuous shallow groove 61 is formed by a short inward flange feature 61', sized to provide for located reception of the lower flange 37 of the skirt 57, when inverted.
  • the core 52 rises with a convergent upper body portion which is profiled to establish internal features of the back-plate 50.
  • an acute-angle truncation which is at acute inclination to the plane 58-58 and to the axis 62 of airway-tube reception is provided with ridge formations 63 analogous to those at 29 in Fig. 4, to establish the spaced apertures in a membrane 64 for a ventilating flow through the completed mask.
  • the outer surfaces of formations 63 are flat and in the said plane of truncation, for clean fit to the flat truncated distal end 68' of a mould-cavity defining plug 68 which is retractably guided in a bore of outer-mould structure 55, and which has a shoulder 65' to define a limit stop at 65 in the airway-tube reception bore of plate formation 50.
  • skirt 57 of the intermediate moulded product of Fig. 6 will bring lower flange 37 into engagement with groove 61, for adhesively retained completion of the toroidal inflation ring 51.
  • the fitted adjacent surfaces of plate 50 and of the inverted skirt 57, near the lower end of the inverted skirt will accept the recommended provision of a silicone fillet, suggested at 67 in Fig. 5.
  • Fig. 8 and its manufacture are generally as described for the embodiment of Fig. 5, except for the additional provision for oesophagus drainage pursuant to the disclosure of pending U.S. patent application Ser. No. 919,289, filed July 24, 1992. Parts in Fig. 8 and in related Figs. 9 and 10 which correspond to those of Figs. 5, 6 and 7 are given the same reference numbers, so that description is thereby simplified.
  • the additional function of oesophagus drainage in Fig. 8 is provided by a re-entrant flexible drainage-tube formation 70, integrally formed with skirt 71 in the single moulding operation which creates the intermediate product of Fig. 9, and which upon skirt reversal, positions the drainage-tube formation 70 upon the upper surface of the back-plate 50' and poised for assembly of flexible tubing 72 thereto, for external evacuation of discharge(s) from the oesophagus.
  • the outer mould component 55' is shown to have a cylindrical bore 73, for removably connected accommodation of a plug element 74 which is coaxially spaced within bore 73 by reason of threaded mounting near the outer wall surface of outer-mould structure 55'.
  • the unthreaded end of plug element 74 is either in contact with the most distal bulge forming region 34' of the skirt cavity 28, or, as shown, is fitted into a local bore of core 52, so that core contouring around the open end of the bore can develop a smoothly rounded internal contour 69 (Fig. 9); in Fig. 8, the contour 69 of Fig. 9 is seen to account for the smoothly rounded inlet of the evacuation passage to tube 72.
  • a shallow groove formation 75 (see Fig. 9) at the distal end of the outer profile of back-plate formation 50' is sized for nested accommodation of the evacuation tube 72, when assembled to tubular formation 70.
  • a local arcuate "cut-out" 76 defined by a local outer-mould formation 76', enables the skirt 71', upon inversion, to fit over and around tubular formation 70, thus simplifying the process of securing and sealing the inflatable ring 71 which is produced by inversion of skirt 71'.
  • the inflatable cushion need merely cover the unsealed location of "cut-out" 76 around tubular formation 70, whereby to enable inflation of ring 71 to concurrently inflate the cushion, and deflation of ring 71 to concurrently deflate the cushion; however, for more reliable concurrent inflation of ring 71 and the cushion, it is preferred to drill an aperture 78 in the skirt of Fig. 9 near but offset above flange 37, for assured air communication between ring 71 and the cushion.
  • an aperture 78 in the skirt of Fig. 9 near but offset above flange 37, for assured air communication between ring 71 and the cushion.
  • the inflated condition of the cushion which may have a potentially inflated contour suggested by phantom line 77, enables the cushion to bear against the back wall of the pharynx for gently loaded application of inflatable ring 71 into its intended sealing engagement with the laryngeal inlet.
  • the cushion schematically indicated in Fig. 8 comprises ' a suitably cut shell of thin flexible material adhered peripherally to the equator (suggested at 79) of the inflatable ring 71 and suitably apertured to fit around and be adhesively sealed to the two tubular members 50' and 72.
  • wall thickness is circumferentially uniform accounts for natural circumferential uniformity in the ring section.
  • This uniform thickness can be reliably made thinner than the "nominal" greater thickness of prior constructions is responsible (a) for greater flexible collapse of the mask to a smaller, more pliable structure when evacuated (for insertion in or removal from a patient) , and (b) for more compliantly adapted conformability with abutting profile features of the laryngeal inlet when inflated in installed position.
  • the moulded inner surface of the skirt is of less circumferential extent than the circumferential extent of the moulded outer surface. But on skirt inversion, what was an inner surface of unstressed lesser circumferential extent becomes an outer surface of necessarily greater, but tension-stressed, circumferential extent; at the same time, on skirt inversion, what had been an outer surface of unstressed greater circumferential extent becomes an inner surface of necessarily lesser, but compression-stressed, circumferential extent.

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  • Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • Engineering & Computer Science (AREA)
  • Hematology (AREA)
  • Animal Behavior & Ethology (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Veterinary Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Emergency Medicine (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Robotics (AREA)
  • Mechanical Engineering (AREA)
  • Prostheses (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Accommodation For Nursing Or Treatment Tables (AREA)
  • Manipulator (AREA)

Abstract

Méthode de fabrication d'un masque laryngien (10), essentiellement comme décrit dans le Brevet 6B 2205499B. Cette méthode fait appel à un moule (20, 21, 23, 24) permettant de fabriquer la structure d'anneau gonflable (13) du dispositif selon une forme inversée. Ceci permet d'obtenir un noyau (20) plus rigide dans la cavité du moule, ou encore d'utiliser un procédé de moulage à plongeur, ce qui à son tour permet d'obtenir une plus grande précision dans le contrôle de l'épaisseur des parois. Une autre forme de moule rend superflu l'assemblage d'un autre composant, en incorporant ce dernier dans le même procédé de moulage unique. Selon encore une autre réalisation, le même procédé de moulage unique permet d'obtenir de plus un orifice de drainage de l'oesophage formé intégralement, indépendamment de la fonction de ventilation par le larynx proprement dite du masque.
PCT/GB1993/000578 1993-02-01 1993-03-22 Dispositif de voie respiratoire artificielle Ceased WO1994017848A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU39582/93A AU785501B2 (en) 1993-02-01 1993-03-22 Artificial airway device
CA002155112A CA2155112C (fr) 1993-02-01 1993-03-22 Dispositif de masque respiratoire

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US003,900 1993-02-01
US08/003,900 US5305743A (en) 1992-03-05 1993-02-01 Artificial airway device

Publications (1)

Publication Number Publication Date
WO1994017848A1 true WO1994017848A1 (fr) 1994-08-18

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1993/000578 Ceased WO1994017848A1 (fr) 1993-02-01 1993-03-22 Dispositif de voie respiratoire artificielle

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AU (1) AU785501B2 (fr)
CA (1) CA2155112C (fr)
WO (1) WO1994017848A1 (fr)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2359996A (en) * 2000-02-08 2001-09-12 Smiths Industries Plc Masks and their manufacture
WO2004089453A3 (fr) * 2003-04-11 2004-11-18 Ambu As Masque larynge et procede de fabrication
WO2007071429A3 (fr) * 2005-12-22 2007-10-25 Unomedical As Assemblage de masque laryngé
GB2438799A (en) * 2003-08-14 2007-12-05 Muhammed Aslam Nasir A method of manufacturing an airway device
US8181587B2 (en) 2002-07-02 2012-05-22 Createx S.A. Method of producing reinforced, formed fabrics
US8506739B2 (en) 2002-07-02 2013-08-13 Createx S.A. Method of producing sails using reinforced, formed fabrics
US9266268B2 (en) 2002-08-14 2016-02-23 Muhammed Aslam Nasir Method of manufacturing an airway device
US9265905B2 (en) 2010-06-24 2016-02-23 Ashkal Developments Limited Stopper device
USD761952S1 (en) 2012-07-27 2016-07-19 Docsinnovent Limited Airway device
US9592358B2 (en) 2008-06-04 2017-03-14 Intersurgical Ag Respiratory interface devices
US9937311B2 (en) 2012-01-27 2018-04-10 Ashkal Developments Limited Stopper device
USD842456S1 (en) 2015-12-15 2019-03-05 Intersurgical Ag Airway device
US10625037B2 (en) 2013-12-17 2020-04-21 Intersurgical Ag Intubating airway device
WO2022189995A1 (fr) * 2021-03-12 2022-09-15 Teleflex Life Sciences Pte. Ltd. Procédé et appareil de fabrication d'un dispositif médical à manchon
US11701484B2 (en) 2017-12-13 2023-07-18 Ashkal Developments Limited Airway device
USD1025348S1 (en) 2020-04-16 2024-04-30 Intersurgical Ag Airway device
USD1051359S1 (en) 2015-06-15 2024-11-12 Intersurgical Ag Airway device
USD1076060S1 (en) 2019-01-18 2025-05-20 Ashkal Developments Limited Airway device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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US8506739B2 (en) 2002-07-02 2013-08-13 Createx S.A. Method of producing sails using reinforced, formed fabrics
US8709186B2 (en) 2002-07-02 2014-04-29 Createx S.A. Method of producing reinforced, formed fabrics
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US9475223B2 (en) 2002-08-14 2016-10-25 Muhammed Aslam Nasir Method of manufacturing an airway device
US9266268B2 (en) 2002-08-14 2016-02-23 Muhammed Aslam Nasir Method of manufacturing an airway device
US7694682B2 (en) 2003-04-11 2010-04-13 Ambu A/S Laryngeal mask and a method manufacturing same
WO2004089453A3 (fr) * 2003-04-11 2004-11-18 Ambu As Masque larynge et procede de fabrication
GB2438799A (en) * 2003-08-14 2007-12-05 Muhammed Aslam Nasir A method of manufacturing an airway device
GB2438799B (en) * 2003-08-14 2008-05-21 Muhammed Aslam Nasir Improved airway device
WO2007071429A3 (fr) * 2005-12-22 2007-10-25 Unomedical As Assemblage de masque laryngé
US9592358B2 (en) 2008-06-04 2017-03-14 Intersurgical Ag Respiratory interface devices
US9265905B2 (en) 2010-06-24 2016-02-23 Ashkal Developments Limited Stopper device
US9937311B2 (en) 2012-01-27 2018-04-10 Ashkal Developments Limited Stopper device
USD769442S1 (en) 2012-01-27 2016-10-18 Ashkal Developments Limited Airway device
USD768846S1 (en) 2012-01-27 2016-10-11 Ashkal Developments Limited Airway device
USD761952S1 (en) 2012-07-27 2016-07-19 Docsinnovent Limited Airway device
US10625037B2 (en) 2013-12-17 2020-04-21 Intersurgical Ag Intubating airway device
USD1051359S1 (en) 2015-06-15 2024-11-12 Intersurgical Ag Airway device
USD842456S1 (en) 2015-12-15 2019-03-05 Intersurgical Ag Airway device
USD877888S1 (en) 2015-12-15 2020-03-10 Intersurgical Ag Airway device
US11701484B2 (en) 2017-12-13 2023-07-18 Ashkal Developments Limited Airway device
USD1076060S1 (en) 2019-01-18 2025-05-20 Ashkal Developments Limited Airway device
USD1025348S1 (en) 2020-04-16 2024-04-30 Intersurgical Ag Airway device
WO2022189995A1 (fr) * 2021-03-12 2022-09-15 Teleflex Life Sciences Pte. Ltd. Procédé et appareil de fabrication d'un dispositif médical à manchon

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CA2155112C (fr) 2003-12-23

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