CA2063583A1 - Tracheal tube assemblies - Google Patents
Tracheal tube assembliesInfo
- Publication number
- CA2063583A1 CA2063583A1 CA002063583A CA2063583A CA2063583A1 CA 2063583 A1 CA2063583 A1 CA 2063583A1 CA 002063583 A CA002063583 A CA 002063583A CA 2063583 A CA2063583 A CA 2063583A CA 2063583 A1 CA2063583 A1 CA 2063583A1
- Authority
- CA
- Canada
- Prior art keywords
- inner cannula
- outer tube
- cannula
- tube
- patient end
- 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.)
- Abandoned
Links
Classifications
-
- 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. mouth-to-mouth respiration; 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. mouth-to-mouth respiration; Tracheal tubes
- A61M16/04—Tracheal tubes
- A61M16/0402—Special features for tracheal tubes not otherwise provided for
- A61M16/0427—Special features for tracheal tubes not otherwise provided for with removable and re-insertable liner tubes, e.g. for cleaning
Abstract
A tracheal tube assembly has an outer tube (1) and an inner cannula (2) with a patient end (22) that is flared outwardly to a diameter greater than the internal diameter of the outer tube. When inserted in the outer tube, the patient end of the inner cannula is deformed inwardly and forms a wiping seal. The remainder of the inner cannula (2) has an external diameter less than the internal diameter of the outer tube (1) so that it is readily inserted.
The inner cannula may be coextruded with an outer layer (20) of a low friction material such as a polyolefine.
The inner cannula may be coextruded with an outer layer (20) of a low friction material such as a polyolefine.
Description
~- WO91/12B45 2 ~ PCT/GB9l/00235 ; " :.
- Tracheal tube ~ssemblies.
. . .
~: '. -.' This invention relates to tracheal tube assemblies of the kind having an outer tube an inner - cannula that is insertable within and removable from the outer tube.
'- .
~ . .
With such assemblies, the inner cannula is ~ "
removed and replaced periodically when secretions have built up on the cannula to an extent that there is a risk of blockage. Tracheal tube assemblies are described, for -example, in US 3948274, GB 2056285B, GB 1099277, GB 125754, WO 90/04992, FR 2539998A, DE 72467, DE 1268313, EP 0107779A, US 4817598, US 3659612, US 4009720, US 3088466, US 4315545, US 2765792, `
US 3169529, US 3263684, US 3334631, US 3587589, US 3688774, US 3731692, US 3889688, US 3948273, 1 US 3973569, US 3987798, US ~033353, US 4045058, i~ US 4235229, US 4471776, US 4593690.
j The inner surface of tracheal tubes, in use, tends i to accumulate a film of respiratory secretions and bacteria. This film can obstruct the bore of the tube and ~ reduce gas flow along it. It has been found that the film -l can also act as a site for build up of bacteria in :
~, quantities sufficient to cause infection if dislodged from ;~ the tube and subsequently inhaled. The use of an inner ;
. , .
WV91/12845 2 0 ~ 3 ~ 8 3 PCT/GB91/0023~
.
i cannula which is periodically removed and replaced, can reduce these effects but brings with it disadvantages. In particular, the thickness of the wall of the inner cannula will itself reduce the effective bore of the tube. This . ~ .
can be mitigated ~y making the external diameter of the inner cannula as close as possible to the internal diameter of the tube and making the cannula wall is as thin as possible in order to maximize the diameter of the gas passage through the tube assembly. It is also important to prevent passage of secretions between the outside of the cannula and the inside of the outer tube.
A close fitting inner cannula can, however, be difficult to insert because of friction with the bore of the tube. r-This can make inner cannula prone to kinking, especially if the wall of the cannula is thin. This difficulty is . . .
aggravated by the fact that the inner cannula is preferably made of material to which secretions will cling without becoming dislodged into the bronchii and that these materials, such as PVC, tend to have a relatively high coefficient of ~riction. These materials also tend to be relatively flexible, so that the cannula wall must i~ be made thick enough to prevent kinking on insertion.
~` j , .
It is an object o~ the present invention to provide an improved tracheal tube assembly.
. .~
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.
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, ,, . . . ~ , -" . .,: . , - . . . . ... . .
~ 3 ~
According to the present invention there is --provided a tracheal tube assembly of the above-specified kind, characterised in that the inner cannula has at its patient end an external diameter that is greater than that of the major part of the inner cannula, that the external diameter at the patient end is at least equal to the internal diameter of the outer tube such that the inner cannula seals with the outer tube at its patient end, and that the external diameter of the major part of the inner cannula is less than the internal diameter of the outer tube so that the inner cannula is freely insertable . . . ~
along the outer tube.
. ': .
The patient end of the inner cannula is preferably deformable radially, before insertion in the outer tube the external diameter of the patient end of the inner cannula being greater than the internal diameter of the outer tube. The inner cannula is preferably flared outwardly at the patient end and may be of a plastic material. The inner cannula may have an inner surface to which respiratory secretions will cling and an outer surface of a different material with a lower coefficient of friction than the inner surface. The inner surface may be of PVC and the outer surface of polyolefine. The patient end of both the inner cannula and the outer tube may be bevelled.
...
' ~' ... . ..
: : :
WO91~12845 PCT/GB91/00235 .
An endotracheal tube assembly in accordance with the present invention, will now be described, by way of example, with reference to the accompanying drawings, in which:
-.
.
Figure l is a sectional side elevation of a part of the assembly;
:
Figure 2 is an enlarged side elevation section of a part of the assembly;
and Figure 3 is a transverse . sectional view along j the line III
' of Figure 2.
1, ~ .
,, .
, " , .... .... .
. ~.
The assembly comprises an outer endotracheal tube 1 of conventional construction and an inner cannula 2 which is insertable in, and removable from, the outer tube.
,", ' ' The outer tube 1 is of a constant radius curvature along its length and is made of PVC or a similar plastics material. At its forward, patient end, the tube 1 has a bevelled, open tip lO which, in use, is located in the trachea of the patient. Close to the forward end, a cuff 11 embraces the tube which is inflatable via a lumen 12 extending along the wall of the tube which communicates with an inflation line 13 and connector 14. A flange 15 is connected to the rear, machine end of tube 1 where it , emerges from the mouth of the patient.
The inner cannula 2 is of the same length as the outèr tube 1 and in preformed with the same curvature.
The inner cannula 2 is a coextrusion of two different materials. More particularly, the outer layer 20 is of a relatively low friction plastics material such as a polyolefine, for example, a low density polyethylene or polypropylene. The inner layer 21 is of a material with a higher coefficient of friction but which enables respiratory secretions and bacteria to cling to it. In this respect, the inner layer 21 may be of the same material as the outer tube 1, namely PVC. Various , . ,: . ~ . .
. ), . :' `` ' ~ "';
W091/12845 PCT/GB91/0023e 2~3~8~3 different factors determine the degree to which secretions will cling to the inner layer 21. For example, a highly polar material will improve adhesion as will the presence of microscopic surface formations. A hydrophilic material may also provide a better site for adhesion of the secretions.
, The outer layer 20 is more rigid that the inner layer 21 which is relatively flexible.
The inner cannula 2 is of circular shape and of !'' the same external diameter along the major part of its ~ ;
length, which is slightly less than the internal diameter ; of the outer tube. The clearance between the inner , cannula and the outer tube is sufficient to enable the inner cannula to be freely inserted and removed without 4l substantially reducing the internal diameter and hence the gas passage through the assembly. Insertion is further facilitated by the low friction outer surface of the cannula.
:
At its patient end, the cannula 2 is flared `
outwardly to form a portion 22 which, in its natural state, before insertion in the outer tube 1, has an external diameter slightly greater than the internal diameter of the outer tube.
.
"~, : ;
, . ,. ~
:
., ~ WO91/12845 2 ~ ~ 3 ~ ~ 3 PCT/GB91/00235 At its machine end, the cannula 2 has a coupling -23, the forward end of which mates with the machine end of the outer tube l. The rear end of the coupling is provided with a female luer tapered recess 24 that is adapted to receive a cooperating coupling (not shown) connected to a patient ventilator.
; : ' In use, the forward end of the inner cannula 2 is pushed into the machine end of the outer tube l, the bevel at the forward end of the cannula serving to aid initial insertion into the tube. The deformable nature of the inner cannula allows its forward portion 22 to be deformed inwardly by contact with the inside of the tube. In this way, the portion 22 forms a sliding, wiping seal with the tube l as it is pushed along it. The friction produced by contact of the portion 22 with the tube l is relatively small because of the small area of contact, so that there is little impediment to insertion. When fully inserted, the for~ard portion 22 of the inner cannula is a close, sealing fit with the bore o~ the tube l at its patient end. In this way, there is little risk of secretions .: , . :
passing between the inner cannula 2 and the outer tube l. ~
, . ' ~;, .'' . ,. :
.. .. .
WO91/12845 PCT/GB91/0023~- ;
~35~3 The nature of the inner surface 21 of the cannula 2 is such that respiratory secretions and bacteria will readily cling to it with only a low risk of dislodgement.
.:
The inner cannula 2 is periodically removed, when accumulated secretions have built up, and replaced by a ` new cannula, without the need to remove the outer tube.
The inner cannula 2 is removed at least once every twelve hours and preferably more frequently, such as every six ; hours. Conveniently, the cannula is replaced once every time there is a change in shift of nursing staff.
Previously, inner cannulae have been replaced only when secretions have reached the stage of threatening to block passage through the assembly, such as, once a day, or every other day. The importance of more frequent replacement in reduced bacterial infection has not heretofore been appreciated.
; Because the outer layer 20 of the inner cannula 2 is of a more rigid material than the inner layer 21, it ; enables the cannula to be made with a thinner wall than would be possible if it were made entirely from the material of the inner layer, and without the risk of the cannula kinking on insertion.
' .~; .
.',.~ ~
., . . . , :
WO91/12845 2~ 3 ~ ~ 3 PCT/GB91/00235 . It will be appreciated that the inner cannula 2 ---; need not be a coextrusion but that the inner or outer surface could be provided by treating or coating with a different material. The assembly could be a tracheostomy tube assembly instead of an endotracheal tube assembly.
'' ' ~'' ' " .'.:
, I, .. .. ..
~ '',.''', ' ~ l `
~,j . , : :
' '. ''' ' . .
~' ~
.,.~ ~ .
- Tracheal tube ~ssemblies.
. . .
~: '. -.' This invention relates to tracheal tube assemblies of the kind having an outer tube an inner - cannula that is insertable within and removable from the outer tube.
'- .
~ . .
With such assemblies, the inner cannula is ~ "
removed and replaced periodically when secretions have built up on the cannula to an extent that there is a risk of blockage. Tracheal tube assemblies are described, for -example, in US 3948274, GB 2056285B, GB 1099277, GB 125754, WO 90/04992, FR 2539998A, DE 72467, DE 1268313, EP 0107779A, US 4817598, US 3659612, US 4009720, US 3088466, US 4315545, US 2765792, `
US 3169529, US 3263684, US 3334631, US 3587589, US 3688774, US 3731692, US 3889688, US 3948273, 1 US 3973569, US 3987798, US ~033353, US 4045058, i~ US 4235229, US 4471776, US 4593690.
j The inner surface of tracheal tubes, in use, tends i to accumulate a film of respiratory secretions and bacteria. This film can obstruct the bore of the tube and ~ reduce gas flow along it. It has been found that the film -l can also act as a site for build up of bacteria in :
~, quantities sufficient to cause infection if dislodged from ;~ the tube and subsequently inhaled. The use of an inner ;
. , .
WV91/12845 2 0 ~ 3 ~ 8 3 PCT/GB91/0023~
.
i cannula which is periodically removed and replaced, can reduce these effects but brings with it disadvantages. In particular, the thickness of the wall of the inner cannula will itself reduce the effective bore of the tube. This . ~ .
can be mitigated ~y making the external diameter of the inner cannula as close as possible to the internal diameter of the tube and making the cannula wall is as thin as possible in order to maximize the diameter of the gas passage through the tube assembly. It is also important to prevent passage of secretions between the outside of the cannula and the inside of the outer tube.
A close fitting inner cannula can, however, be difficult to insert because of friction with the bore of the tube. r-This can make inner cannula prone to kinking, especially if the wall of the cannula is thin. This difficulty is . . .
aggravated by the fact that the inner cannula is preferably made of material to which secretions will cling without becoming dislodged into the bronchii and that these materials, such as PVC, tend to have a relatively high coefficient of ~riction. These materials also tend to be relatively flexible, so that the cannula wall must i~ be made thick enough to prevent kinking on insertion.
~` j , .
It is an object o~ the present invention to provide an improved tracheal tube assembly.
. .~
,, :.
.
.. . . . , :.. ~
, ,, . . . ~ , -" . .,: . , - . . . . ... . .
~ 3 ~
According to the present invention there is --provided a tracheal tube assembly of the above-specified kind, characterised in that the inner cannula has at its patient end an external diameter that is greater than that of the major part of the inner cannula, that the external diameter at the patient end is at least equal to the internal diameter of the outer tube such that the inner cannula seals with the outer tube at its patient end, and that the external diameter of the major part of the inner cannula is less than the internal diameter of the outer tube so that the inner cannula is freely insertable . . . ~
along the outer tube.
. ': .
The patient end of the inner cannula is preferably deformable radially, before insertion in the outer tube the external diameter of the patient end of the inner cannula being greater than the internal diameter of the outer tube. The inner cannula is preferably flared outwardly at the patient end and may be of a plastic material. The inner cannula may have an inner surface to which respiratory secretions will cling and an outer surface of a different material with a lower coefficient of friction than the inner surface. The inner surface may be of PVC and the outer surface of polyolefine. The patient end of both the inner cannula and the outer tube may be bevelled.
...
' ~' ... . ..
: : :
WO91~12845 PCT/GB91/00235 .
An endotracheal tube assembly in accordance with the present invention, will now be described, by way of example, with reference to the accompanying drawings, in which:
-.
.
Figure l is a sectional side elevation of a part of the assembly;
:
Figure 2 is an enlarged side elevation section of a part of the assembly;
and Figure 3 is a transverse . sectional view along j the line III
' of Figure 2.
1, ~ .
,, .
, " , .... .... .
. ~.
The assembly comprises an outer endotracheal tube 1 of conventional construction and an inner cannula 2 which is insertable in, and removable from, the outer tube.
,", ' ' The outer tube 1 is of a constant radius curvature along its length and is made of PVC or a similar plastics material. At its forward, patient end, the tube 1 has a bevelled, open tip lO which, in use, is located in the trachea of the patient. Close to the forward end, a cuff 11 embraces the tube which is inflatable via a lumen 12 extending along the wall of the tube which communicates with an inflation line 13 and connector 14. A flange 15 is connected to the rear, machine end of tube 1 where it , emerges from the mouth of the patient.
The inner cannula 2 is of the same length as the outèr tube 1 and in preformed with the same curvature.
The inner cannula 2 is a coextrusion of two different materials. More particularly, the outer layer 20 is of a relatively low friction plastics material such as a polyolefine, for example, a low density polyethylene or polypropylene. The inner layer 21 is of a material with a higher coefficient of friction but which enables respiratory secretions and bacteria to cling to it. In this respect, the inner layer 21 may be of the same material as the outer tube 1, namely PVC. Various , . ,: . ~ . .
. ), . :' `` ' ~ "';
W091/12845 PCT/GB91/0023e 2~3~8~3 different factors determine the degree to which secretions will cling to the inner layer 21. For example, a highly polar material will improve adhesion as will the presence of microscopic surface formations. A hydrophilic material may also provide a better site for adhesion of the secretions.
, The outer layer 20 is more rigid that the inner layer 21 which is relatively flexible.
The inner cannula 2 is of circular shape and of !'' the same external diameter along the major part of its ~ ;
length, which is slightly less than the internal diameter ; of the outer tube. The clearance between the inner , cannula and the outer tube is sufficient to enable the inner cannula to be freely inserted and removed without 4l substantially reducing the internal diameter and hence the gas passage through the assembly. Insertion is further facilitated by the low friction outer surface of the cannula.
:
At its patient end, the cannula 2 is flared `
outwardly to form a portion 22 which, in its natural state, before insertion in the outer tube 1, has an external diameter slightly greater than the internal diameter of the outer tube.
.
"~, : ;
, . ,. ~
:
., ~ WO91/12845 2 ~ ~ 3 ~ ~ 3 PCT/GB91/00235 At its machine end, the cannula 2 has a coupling -23, the forward end of which mates with the machine end of the outer tube l. The rear end of the coupling is provided with a female luer tapered recess 24 that is adapted to receive a cooperating coupling (not shown) connected to a patient ventilator.
; : ' In use, the forward end of the inner cannula 2 is pushed into the machine end of the outer tube l, the bevel at the forward end of the cannula serving to aid initial insertion into the tube. The deformable nature of the inner cannula allows its forward portion 22 to be deformed inwardly by contact with the inside of the tube. In this way, the portion 22 forms a sliding, wiping seal with the tube l as it is pushed along it. The friction produced by contact of the portion 22 with the tube l is relatively small because of the small area of contact, so that there is little impediment to insertion. When fully inserted, the for~ard portion 22 of the inner cannula is a close, sealing fit with the bore o~ the tube l at its patient end. In this way, there is little risk of secretions .: , . :
passing between the inner cannula 2 and the outer tube l. ~
, . ' ~;, .'' . ,. :
.. .. .
WO91/12845 PCT/GB91/0023~- ;
~35~3 The nature of the inner surface 21 of the cannula 2 is such that respiratory secretions and bacteria will readily cling to it with only a low risk of dislodgement.
.:
The inner cannula 2 is periodically removed, when accumulated secretions have built up, and replaced by a ` new cannula, without the need to remove the outer tube.
The inner cannula 2 is removed at least once every twelve hours and preferably more frequently, such as every six ; hours. Conveniently, the cannula is replaced once every time there is a change in shift of nursing staff.
Previously, inner cannulae have been replaced only when secretions have reached the stage of threatening to block passage through the assembly, such as, once a day, or every other day. The importance of more frequent replacement in reduced bacterial infection has not heretofore been appreciated.
; Because the outer layer 20 of the inner cannula 2 is of a more rigid material than the inner layer 21, it ; enables the cannula to be made with a thinner wall than would be possible if it were made entirely from the material of the inner layer, and without the risk of the cannula kinking on insertion.
' .~; .
.',.~ ~
., . . . , :
WO91/12845 2~ 3 ~ ~ 3 PCT/GB91/00235 . It will be appreciated that the inner cannula 2 ---; need not be a coextrusion but that the inner or outer surface could be provided by treating or coating with a different material. The assembly could be a tracheostomy tube assembly instead of an endotracheal tube assembly.
'' ' ~'' ' " .'.:
, I, .. .. ..
~ '',.''', ' ~ l `
~,j . , : :
' '. ''' ' . .
~' ~
.,.~ ~ .
Claims (8)
1. A tracheal tube assembly having an outer tube and an inner cannula that is insertable within and removable from the outer tube, characterised in that the inner cannula (2) has at its patient end (22) an external diameter that is greater than that of the major part of the inner cannula, that the external diameter at the patient end is at least equal to the internal diameter of the outer tube (1) such that the inner cannula (2) seals with the outer tube (1) at its patient end (10) and that the external diameter of the major part of the inner cannula (2) is less than the internal diameter of the outer tube (1) so that the inner cannula (2) is freely insertable along the outer tube.
2. A tracheal tube assembly according to Claim 1, characterised in that the patient end (22) of the inner cannula (2) is deformable radially, and that before insertion in the outer tube the external diameter of the patient end (22) of the inner cannula (2) is greater than the internal diameter of the outer tube 1.
3. A tracheal tube assembly according to Claim 1 or 2, characterised in that the inner cannula (2) is flared outwardly at the patient end (22).
4. A tracheal tube assembly according to anyone of the preceding claims, characterised in that the inner cannula is of a plastics material.
5. A tracheal tube assembly according to any one of the preceding claims, characterised in that the inner cannula (2) has an inner surface (21) to which respiratory secretions will cling, and an outer surface (20) of a different material with a lower coefficient of friction than the inner surface.
6. A tracheal tube assembly according to Claim 4 or 5, characterised in that the inner surface (21) is of PVC.
7. A tracheal tube assembly according to any one of Claims 4 to 6, characterised in that the outer surface is of a polyolefine.
8. A tracheal tube assembly according to any one of the precedins claims, characterised that the patient end of both the inner cannula (2) and the outer tube (1) are bevelled.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9003857.1 | 1990-02-21 | ||
| GB909003857A GB9003857D0 (en) | 1990-02-21 | 1990-02-21 | Medico-surgical tube assemblies |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2063583A1 true CA2063583A1 (en) | 1991-08-22 |
Family
ID=10671343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002063583A Abandoned CA2063583A1 (en) | 1990-02-21 | 1991-02-15 | Tracheal tube assemblies |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US5119811A (en) |
| EP (1) | EP0474802B1 (en) |
| JP (1) | JP2851944B2 (en) |
| AU (1) | AU7326891A (en) |
| CA (1) | CA2063583A1 (en) |
| DE (1) | DE69107376T2 (en) |
| GB (1) | GB9003857D0 (en) |
| WO (1) | WO1991012845A1 (en) |
Families Citing this family (49)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0507886B1 (en) * | 1990-02-21 | 1995-04-26 | Smiths Industries Public Limited Company | Tracheal tube assemblies |
| GB9100147D0 (en) * | 1991-01-04 | 1991-02-20 | Smiths Industries Plc | Tracheal tube assemblies and liners |
| US5287852A (en) * | 1993-01-13 | 1994-02-22 | Direct Trends International Ltd. | Apparatus and method for maintaining a tracheal stoma |
| US5709691A (en) * | 1996-03-11 | 1998-01-20 | Morejon; Orlando | Endotracheal tube cleaning device |
| US7669600B2 (en) * | 1996-03-11 | 2010-03-02 | Orlando Morejon | Endotracheal tube cleaning apparatus |
| US8557054B2 (en) * | 1996-03-11 | 2013-10-15 | Orlando Morejon | Endotracheal tube cleaning apparatus |
| US6055984A (en) | 1996-11-06 | 2000-05-02 | Brain; Archibald I. J. | Endotracheal tube construction |
| FR2758089B1 (en) * | 1997-01-06 | 1999-03-05 | Georges Boussignac | METHOD AND DEVICE FOR EXCHANGING RESPIRATORY TUBE IN THE TRACHEA OF A PATIENT |
| GB9705586D0 (en) * | 1997-03-18 | 1997-05-07 | Smiths Industries Plc | Laryngeal mask assemblies |
| US6575158B1 (en) | 1997-06-03 | 2003-06-10 | The Board Of Regents Of The University Of Texas System | Endotracheal tube guide and related tracheostomy surgical procedure |
| US5954636A (en) * | 1997-07-15 | 1999-09-21 | Schwartz; Roy E. | Pediatric endotracheal tube with bronchial blocker and method for selectively blocking respiratory airflow to a pediatric patient's lung |
| US6079409A (en) | 1997-07-25 | 2000-06-27 | Brain; Archibald Ian Jeremy | Intubating laryngeal mask |
| GB9817537D0 (en) | 1998-08-13 | 1998-10-07 | Brain Archibald Ian Jeremy | A laryngear mask airway with mutually independant laterally-placed ultra-flexible eastric access/discharge and airway tubes |
| US6135111A (en) * | 1998-08-31 | 2000-10-24 | Vital Signs Inc. | Tracheostomy tube with removable inner cannula |
| GB9821771D0 (en) | 1998-10-06 | 1998-12-02 | Brain Archibald Ian Jeremy | Improvements relating to laryngeal mask airway devices |
| US6705318B1 (en) | 1999-04-09 | 2004-03-16 | Archibald I. J. Brain | Disposable LMA |
| US6631720B1 (en) | 1999-10-07 | 2003-10-14 | Archibald I. J. Brain | Laryngeal mask with large-bore gastric drainage |
| US6629924B2 (en) * | 2000-12-15 | 2003-10-07 | Jayson D. Aydelotte | Enhanced endotracheal tube |
| US6792948B2 (en) | 2003-01-22 | 2004-09-21 | Archibald I. J. Brain | Laryngeal mask airway device with airway tube having flattened outer circumference and elliptical inner airway passage |
| GB0304851D0 (en) * | 2003-03-04 | 2003-04-09 | Intersurgical Ltd | Improvements relating to respiratory aids |
| US7134431B2 (en) | 2003-09-08 | 2006-11-14 | Indian Ocean Medical Inc. | Laryngeal mask airway device with position controlling tab |
| DE102005021470A1 (en) * | 2005-05-10 | 2006-11-16 | Tracoe Medical Gmbh | Introducer for percutaneous tracheostomy |
| GB0510951D0 (en) | 2005-05-27 | 2005-07-06 | Laryngeal Mask Company The Ltd | Laryngeal mask airway device |
| DE102006029599A1 (en) * | 2006-06-26 | 2007-12-27 | Tracoe Medical Gmbh | Device for introducing a tracheostomy tube into a tracheostoma |
| DE102007011930B3 (en) * | 2007-03-13 | 2008-02-07 | Willy Rüsch GmbH | Tracheal or tracheostomy tube arrangement for use in e.g. artificial respiration of patient, has supporting structure that supports flexible layer and is formed by hose-shaped netting having filaments and/or fibers made of plastic |
| US8104475B2 (en) * | 2008-11-05 | 2012-01-31 | Smiths Group Plc | Medical tube assemblies |
| GB0903654D0 (en) | 2009-03-03 | 2009-04-15 | Laryngeal Mask Company The Ltd | Artificial airway device |
| US9265904B2 (en) | 2009-07-06 | 2016-02-23 | Teleflex Life Sciences | Artificial airway |
| US9528897B2 (en) | 2009-08-13 | 2016-12-27 | Chimden Medical Pty Ltd | Pressure indicator |
| USD699348S1 (en) | 2010-01-27 | 2014-02-11 | Orlando Morejon | Handle |
| US20110186052A1 (en) * | 2010-02-01 | 2011-08-04 | Orlando Morejon | Cleaning assembly for an endotracheal tube |
| US20110197894A1 (en) * | 2010-02-18 | 2011-08-18 | Orlando Morejon | Endotracheal tube cleaning apparatus |
| GB201016562D0 (en) | 2010-10-01 | 2010-11-17 | Laryngeal Mask Company The Ltd | Artificial airway device |
| JP5922135B2 (en) | 2010-10-15 | 2016-05-24 | ザ ラリンジアル マスク カンパニー リミテッド | Artificial airway device |
| US10549054B2 (en) | 2011-02-02 | 2020-02-04 | Teleflex Life Sciences Unlimited Company | Artificial airway |
| JP2012170792A (en) * | 2011-02-24 | 2012-09-10 | Kawasumi Lab Inc | Tracheal cannula |
| GB201120628D0 (en) | 2011-11-30 | 2012-01-11 | Laryngeal Mask Company The Ltd | Endoscopy device |
| GB201303554D0 (en) | 2013-02-28 | 2013-04-10 | Smiths Medical Int Ltd | Tracheostomy tube assemblies and inner cannulae |
| GB201303553D0 (en) | 2013-02-28 | 2013-04-10 | Smiths Medical Int Ltd | Tracheostomy tube assemblies and inner cannulae |
| GB201405219D0 (en) * | 2014-03-22 | 2014-05-07 | Smiths Medical Int Ltd | Tracheostomy tube assemblies and inner cannulae |
| GB201407573D0 (en) | 2014-04-30 | 2014-06-11 | Smiths Medical Int Ltd | Tubes and their manuacture |
| US10279137B1 (en) | 2014-06-27 | 2019-05-07 | Orlando Morejon | Connector assembly for a medical ventilator system |
| US11395897B1 (en) | 2014-06-27 | 2022-07-26 | Orlando Morejon | Connector assembly for a medical ventilator system |
| GB201510231D0 (en) | 2015-06-11 | 2015-07-29 | Smiths Medical Int Ltd | Tracheostomy tube assemblies and inner cannulae |
| GB201510230D0 (en) | 2015-06-11 | 2015-07-29 | Smiths Medical Int Ltd | Tracheostomy tube assemblie and inner cannulae |
| GB201512674D0 (en) | 2015-07-15 | 2015-08-26 | Smiths Medical Int Ltd | Tracheostomy tube assemblies and inner cannulae |
| GB201515450D0 (en) | 2015-08-29 | 2015-10-14 | Smiths Medical Int Ltd | Tracheostomy tube assemblies and inner cannulae |
| WO2020073141A1 (en) * | 2018-10-08 | 2020-04-16 | Maite Fernandez (1%) | Coaxial endotracheal tube |
| DE102020105522A1 (en) | 2020-03-02 | 2021-09-02 | Tracoe Medical Gmbh | Tracheal ventilation device with optimized cuff tube |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2765792A (en) * | 1953-04-17 | 1956-10-09 | Edgar B Nichols | Tracheal devices |
| US2786469A (en) * | 1953-12-18 | 1957-03-26 | Cohen William | Tracheal tube assembly and tracheal plug |
| US2923299A (en) * | 1957-10-17 | 1960-02-02 | Robert C Blackwood | Tracheostomy tube device |
| US3088466A (en) * | 1960-05-04 | 1963-05-07 | Edgar B Nichols | Tracheal devices |
| US3039469A (en) * | 1960-05-09 | 1962-06-19 | Josephine G Fountain | Direct suction tracheotomy tube |
| US3169529A (en) * | 1963-05-27 | 1965-02-16 | Norman Z Koenig | Tracheostomy tube |
| US3225767A (en) * | 1964-03-13 | 1965-12-28 | South Chester Corp | Tracheal tube device |
| US3334631A (en) * | 1964-09-11 | 1967-08-08 | Dow Corning | Tracheal tube assembly |
| US3443564A (en) * | 1965-06-22 | 1969-05-13 | Drager Otto H | Tracheal tube |
| US3606669A (en) * | 1969-05-26 | 1971-09-21 | Philip Morris Inc | Method of making tracheal tube device |
| US4315505A (en) * | 1980-04-07 | 1982-02-16 | Shiley, Inc. | Tracheostomy tube with disposable inner cannula |
| US4827925A (en) * | 1986-10-20 | 1989-05-09 | Vilasi Joseph A | Cuffless adjustable endotracheal tube |
| US5024220A (en) * | 1988-07-21 | 1991-06-18 | Board Of Regents, The University Of Texas System | Nasotracheal tube insertion connector |
-
1990
- 1990-02-21 GB GB909003857A patent/GB9003857D0/en active Pending
-
1991
- 1991-02-15 JP JP3504075A patent/JP2851944B2/en not_active Expired - Fee Related
- 1991-02-15 WO PCT/GB1991/000235 patent/WO1991012845A1/en active IP Right Grant
- 1991-02-15 CA CA002063583A patent/CA2063583A1/en not_active Abandoned
- 1991-02-15 EP EP91904016A patent/EP0474802B1/en not_active Expired - Lifetime
- 1991-02-15 DE DE69107376T patent/DE69107376T2/en not_active Expired - Fee Related
- 1991-02-15 AU AU73268/91A patent/AU7326891A/en not_active Abandoned
- 1991-02-19 US US07/656,434 patent/US5119811A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2851944B2 (en) | 1999-01-27 |
| WO1991012845A1 (en) | 1991-09-05 |
| EP0474802A1 (en) | 1992-03-18 |
| DE69107376D1 (en) | 1995-03-23 |
| JPH05504082A (en) | 1993-07-01 |
| GB9003857D0 (en) | 1990-04-18 |
| US5119811A (en) | 1992-06-09 |
| AU7326891A (en) | 1991-09-18 |
| EP0474802B1 (en) | 1995-02-15 |
| DE69107376T2 (en) | 1995-06-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |