CA2205985A1 - Ventilation of medical gases - Google Patents
Ventilation of medical gasesInfo
- Publication number
- CA2205985A1 CA2205985A1 CA002205985A CA2205985A CA2205985A1 CA 2205985 A1 CA2205985 A1 CA 2205985A1 CA 002205985 A CA002205985 A CA 002205985A CA 2205985 A CA2205985 A CA 2205985A CA 2205985 A1 CA2205985 A1 CA 2205985A1
- Authority
- CA
- Canada
- Prior art keywords
- patient
- face
- intake
- gas
- intakes
- 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
- A61M16/0087—Environmental safety or protection means, e.g. preventing explosion
- A61M16/009—Removing used or expired gases or anaesthetic vapours
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S128/00—Surgery
- Y10S128/91—Anesthesia gas scavenging system
Abstract
A downdraft system is used for withdrawing and collecting medical gases, fumes, mists and particulates from the vicinity of a patient's face. Two intakes (16) are located on respective sides of the patient's face, at the cheeks. The intakes extend from temple to chin. They are connected through a ducting system (28-46) to a source of vacuum (48) for collecting the medical gases. The ducting system is configured to allow the adjustment of the intake positions. The intakes create a flow of air across the patient's face from above the nose to below the mouth so that gases leaking during administration of gases or exhaled by the patient, and fumes, mists or low velocity particulates generated, for example, in orthodontic procedures, are captured in the flow across the patient's face into the intakes. This leaves the patient's mouth and nose fully exposed and unobstructed by the gas evacuation apparatus so that the administration of gases, dental treatments and any other procedures requiring access to the mouth and nose area may be carried out.
Description
CA 0220~98~ 1997-0~-23 WO 96/06651 PCT/CA9~00~;04 VENTILATION IC~F MEDICAL GASE$
FIELD OF THE I~IVENTION
The! present invention is concerned with the collection of gases, especially medlical gases, and airborne conta,-,inants, for example fumes, mists and partiolLJlates, from the vicinity of the face of a patient.
BACKGROUND
In the application of anesthetic or analgesic gases by means of a gas delivery m3sk to medical and dental patients, gas often escapes into the area around the patient's face and eventually dissipates into a wider area, exposing those in the vicinity to the gas. Studies of this problem are reported in Sass-Kortsak et al.: "Exposure of llospilal Operating Room Personnel to Potentially Harmful Environmental Agents". Am. Ind. Hyg. Assoc. J., Vol.
53, No. 3, Marc:h 1992, pp. 203-209 and Tran et al.: "Evaluation of Waste Anesthetic Gases Monitoring Strategies, and Correlations Between Nitrous Oxide Levels and Health Symptomsn. Am. Ind. Hyg. Assoc. J., Vol. 55, No.
1, January 19~4, pp. 37-41.
O1l13 aspect of the invention relates to a method of evacuating sases and airborne contar"ir-a"l:, from adjacent the face of a patient by creali~,g an an3;3 of low pressure adjacent the palienl's face and collecting gases flowing ilnto the low pressure area.
Another aspect of the invention relates to a medical gas evacuation appe-lratus for withdrawing gas from adjacent the face of a patient, the apparatus comprising gas intake means, support means for supporting the intake means alijacent the patient's face and suction means for drawing air and the medical gas into the inlet means and collecting the gas so drawn in.
CA 0220~98~ l997-0~-23 WO 96/06651 PCT/CA9~i/00504 A rnethod and an apparatus of the above type are disclosed in US patent 4,895,172, issued 23 January 1990 to Erik A. Lindkvist. This patent discloses a hollow cup that is set over a patient's chin and attached to the patient's head with a harness. Gases are drawn into openings in the front of the cup and thence to a vacuum source.
Various other proposals have been made for dealing with this problem. These include auxiliary ventilation, as reported in Mickelsen et al.:
"Auxiliary Ventilation for the Control of Nitrous Oxide in a Dental Clinicn.
Appl. Occp. Environ. Hyg., Vol 8, No. 6, June 1993, pp. 56~570. That study concluded that air flow rates sufficiently high to cause noise problems or a hood relatively close to the patient would be required for adequate control. Neither high noise levels nor a hood close to a patient's face is acceptable in many, if not most, dental and surgical applications. For example, in dentistry full ~ccess to the patient's mouth, without obstruction, is required.
Other proposals are found in the following:
United States patent 5,195,512 issued March 23, 1993, which discloses a suction tube supported in position above the patient's face;
United States patent 4,807,617 issued February 28, 1989, which discloses a mask with a scavenging cup on its outer side;
United States patent 3,877,691 issued April 15, 1975, which discloses a hollow hood or shield, perforated on one side and connected to a suction line;
None of these devices is fully satisfactory. Hoods, shields and masks cover the face at least partially and are not useful in many applications. Suction devices sp~ced from the face are not exceptionally CA 0220~98~ 1997-0~-23 WO 96/0665~ PCTJCA9~;)DD5D4 erreclive as reported by Mickelsen et al. (supra). A suction arrangement at the chin, as prol~osed in Lindkvist will not adequately draw in gases leaking from a mask aroulnd the nose, because the mask, the hands of a dentist or other obstructions are in the flow path. A chin cup also obstructs access to the mouth for d0n,tal and the like lreal-,-ents.
The present invention is concerned with a method and an apparatus for the err~ e capturing of these medical gases, and fumes, mists and particulates generated during dental and surgical procedures, while allowing substantially full access to the patient's face, including mouth and nose, for dental Lreal..,e,)t, the admini~l~dlion of the gases or substantially any other purpose desired.
SUMMARY
Accalrding to the present invention there is provided a method of the type describeld above that is characterised in that low pressure areas are produced on opposite sides of the patient's face, beside the patient's cheeks.
The low pressure areas are created by placing gas intakes bilaterally at the cheeks of the patient. This withdraws gas across the face and down into thle inlets. Gases escaping from any area around a mask or nose cup or from a patient's mouth or nose during exhalation will be captured. The bilateral arrangement ensures that there are no dead zones around the moulth and nose area. The intakes, being at the cheeks, are well clear of the mout~h and nose, so that gases may be administered in the usual ways and there will be minimal interference with such things as dental procedures.
Acc:ording to another aspect of the present invention there is provided an evacuation apparatus as described above, characterised in that:
CA 0220~98~ 1997-0~-23 the gas intake means comprise two gas intakes; and the support means support the respective gas intakes on respective opposite sides of the patient's face, at the cheeks.
The gas collected will include escaping medical gases as well as ambient air and any airborne contaminants from a location as close as possible to the source from which they are emitted. Medical gases generally are denser than air and will naturally sink in air. The apparatus thus augments the natural flow of these gases when the patient is in the supine position normally adopted for dental and surgical procedures. This conlrasl~
with the withdrawal of gases against their natural flow and from some considerable spacing with overhead suction devices.
The intakes are preferably flat, flaring ducts with open inner sides facing the patient's cheeks, and open front ends facing forwards. The open front ends preferably extend from the temple to the chin of the patient.
It has been found that a front end width of 11/2 inches (3.8 cm) will draw a sufficient volume of air at a velocity low enough to minimize the noise produced. The intakes may be mounted for adjustment relative to the pdlient. This may be done by mounting the intakes for rotation on telescopic suction ducts that allow adjustment of the intakes laterally, towards and away from one another. It is also prefer,ed that the intakes are made from a relatively soft material that is at least slightly deformable to allow the intakes to be shaped to conform closely with the patient's face. This reduces the intake of air from locations other than along the patient's cheeks and thus improves efficiency.
CA 0220~98~ l997-0~-23 WO 96/06651 PC~J~A9SJ~050 In some applications, the apparatus may be installed permanently, lFor example on a dental chair. In other applications, the apparatus may be portable.
BRIEF DES~..IPIllON OF THE DRAWINGS
~ n the accompanying drawings, which illustrate an exemplary embodiment of 1:he present invention:
Figure 1 is a front view of an apparatus according to the present invention:
Fi~lJre 2 is a back view of the apparatus;
Fi!aure 3 is a top view of the apparatus;
Fi~ re 4 is a side view of the apparatus; and Figure 5 is an inside view of an intake.
DETAILED DESC:RIPTION
The terms "frontn, "backn, "top" and "side" are all used relative to a patient's head since the absolute orienlalion of the apparatus is dependent on 1:he actual orientation of the patient at the time of use.
Referring to the accompanying drawings, there is illustrated a gas evacuation apparatus 10 shown associated with the head rest of an existing dental chair 12, partially illustrated in broken lines. Figures 1 and 3of the drawings also show a patient's head 14 associated with the apparatus.
The evacuation apparatus includes two inlet intakes 16 that are, in use, positionled on opposite sides of the patient's head, adjacent the cheeks. Each iintake has an open inner side 18 confronting the adjacent cheek of the welarer, an open front end 20 and an opposite exhaust end 22.
Each intake is generally rectangular in cross section and flares in height from the exhaust end 22 to the front end 20. The intakes are made from a CA 0220~98~ 1997-0~-23 resilient rubber material that is somewhat deformable so that its shape can be altered to match that of the patient's face.
The exhaust end 22 of each intake is connected to a duct 24.
The duct has a l.dnsilion section 26 with a rectangular section front end 28 connected to the exhaust end 22 of the intake and a circular cross section back end 30. The duct has a rear cylindrical section 32 that slides telescopically, front to back, in an adjustment sleeve 34 SO that the fore and aft position of the intake can be adjusted. The cylindrical section 32 also rotates in the sleeve 34 SO that the intake can be arranged parallel to the adjacent cheek of a patient.
The adju~l."e"l sleeve 34 iS connected to an elbow 36 which in turn is connected to an upright duct section 38. The connections of the adjustment sleeve 34 to the intake and the elbow are efrecled by rubber seals that allow the lateral adjustment of the intake against the face of a patient.
The two duct sections 38 connect to inlets at the opposi~e ends of a lateral manifold 40. The manifold has a center outlet 44 connected to an exhaust duct 46 leading to a vacuum source 48 that creates a low pressure in the complete evacuation system, thus creali--g Iow pressure zones in the intakes, at the patient's cheeks.
In use, the intakes are located on opposite sides of the patient's head, at the cheeks. The intakes are surrici.:"ll~y wide that the low pressure area in them will create a flow of air across the patient's face from above the nose to the chin and following the contours of the face. Medical gases escaping from a nose cup, a face mask or exhaled by the patient, fumes, mists and particulates will thus be drawn across the patient's face and into the intakes, which are positioned to take advantage of their natural CA 0220~98~ 1997-0~-23 downward flow. The open inner side of the intake effectively uses the patient's face itself as the inner wall of the intake so as to provide a very large intake area and to minimize the opportunity for gas to escape along the patient's face.
With the use of this apparatus, the patient's face is minimally obstructed so 1hat the mouth and nose are accessible for the application of gas in a convenltional way or for such other procedures as dental Ireal~enl.
It has been found that the apparatus is also useful in evacuating the mists, fumes and low velocity particulates generated in surgical and dental procedures .
While one embodiment of the present invention has been described in the foregoing, it is to be understood that other embodiments are possible within the scope of the invention. For example, the illuslrdled embodiment is s;hown as attached to a chair such as used in a dental clinic.
In other applications, for example in operaling theaters, other physical arrangements of the evacuation ducting may be employed. Both permanent and portable irstallations are possible. The invention is therefore not to be considered limited to the exe""~la"~ embodiment described above, but only by the scope of the appended claims.
FIELD OF THE I~IVENTION
The! present invention is concerned with the collection of gases, especially medlical gases, and airborne conta,-,inants, for example fumes, mists and partiolLJlates, from the vicinity of the face of a patient.
BACKGROUND
In the application of anesthetic or analgesic gases by means of a gas delivery m3sk to medical and dental patients, gas often escapes into the area around the patient's face and eventually dissipates into a wider area, exposing those in the vicinity to the gas. Studies of this problem are reported in Sass-Kortsak et al.: "Exposure of llospilal Operating Room Personnel to Potentially Harmful Environmental Agents". Am. Ind. Hyg. Assoc. J., Vol.
53, No. 3, Marc:h 1992, pp. 203-209 and Tran et al.: "Evaluation of Waste Anesthetic Gases Monitoring Strategies, and Correlations Between Nitrous Oxide Levels and Health Symptomsn. Am. Ind. Hyg. Assoc. J., Vol. 55, No.
1, January 19~4, pp. 37-41.
O1l13 aspect of the invention relates to a method of evacuating sases and airborne contar"ir-a"l:, from adjacent the face of a patient by creali~,g an an3;3 of low pressure adjacent the palienl's face and collecting gases flowing ilnto the low pressure area.
Another aspect of the invention relates to a medical gas evacuation appe-lratus for withdrawing gas from adjacent the face of a patient, the apparatus comprising gas intake means, support means for supporting the intake means alijacent the patient's face and suction means for drawing air and the medical gas into the inlet means and collecting the gas so drawn in.
CA 0220~98~ l997-0~-23 WO 96/06651 PCT/CA9~i/00504 A rnethod and an apparatus of the above type are disclosed in US patent 4,895,172, issued 23 January 1990 to Erik A. Lindkvist. This patent discloses a hollow cup that is set over a patient's chin and attached to the patient's head with a harness. Gases are drawn into openings in the front of the cup and thence to a vacuum source.
Various other proposals have been made for dealing with this problem. These include auxiliary ventilation, as reported in Mickelsen et al.:
"Auxiliary Ventilation for the Control of Nitrous Oxide in a Dental Clinicn.
Appl. Occp. Environ. Hyg., Vol 8, No. 6, June 1993, pp. 56~570. That study concluded that air flow rates sufficiently high to cause noise problems or a hood relatively close to the patient would be required for adequate control. Neither high noise levels nor a hood close to a patient's face is acceptable in many, if not most, dental and surgical applications. For example, in dentistry full ~ccess to the patient's mouth, without obstruction, is required.
Other proposals are found in the following:
United States patent 5,195,512 issued March 23, 1993, which discloses a suction tube supported in position above the patient's face;
United States patent 4,807,617 issued February 28, 1989, which discloses a mask with a scavenging cup on its outer side;
United States patent 3,877,691 issued April 15, 1975, which discloses a hollow hood or shield, perforated on one side and connected to a suction line;
None of these devices is fully satisfactory. Hoods, shields and masks cover the face at least partially and are not useful in many applications. Suction devices sp~ced from the face are not exceptionally CA 0220~98~ 1997-0~-23 WO 96/0665~ PCTJCA9~;)DD5D4 erreclive as reported by Mickelsen et al. (supra). A suction arrangement at the chin, as prol~osed in Lindkvist will not adequately draw in gases leaking from a mask aroulnd the nose, because the mask, the hands of a dentist or other obstructions are in the flow path. A chin cup also obstructs access to the mouth for d0n,tal and the like lreal-,-ents.
The present invention is concerned with a method and an apparatus for the err~ e capturing of these medical gases, and fumes, mists and particulates generated during dental and surgical procedures, while allowing substantially full access to the patient's face, including mouth and nose, for dental Lreal..,e,)t, the admini~l~dlion of the gases or substantially any other purpose desired.
SUMMARY
Accalrding to the present invention there is provided a method of the type describeld above that is characterised in that low pressure areas are produced on opposite sides of the patient's face, beside the patient's cheeks.
The low pressure areas are created by placing gas intakes bilaterally at the cheeks of the patient. This withdraws gas across the face and down into thle inlets. Gases escaping from any area around a mask or nose cup or from a patient's mouth or nose during exhalation will be captured. The bilateral arrangement ensures that there are no dead zones around the moulth and nose area. The intakes, being at the cheeks, are well clear of the mout~h and nose, so that gases may be administered in the usual ways and there will be minimal interference with such things as dental procedures.
Acc:ording to another aspect of the present invention there is provided an evacuation apparatus as described above, characterised in that:
CA 0220~98~ 1997-0~-23 the gas intake means comprise two gas intakes; and the support means support the respective gas intakes on respective opposite sides of the patient's face, at the cheeks.
The gas collected will include escaping medical gases as well as ambient air and any airborne contaminants from a location as close as possible to the source from which they are emitted. Medical gases generally are denser than air and will naturally sink in air. The apparatus thus augments the natural flow of these gases when the patient is in the supine position normally adopted for dental and surgical procedures. This conlrasl~
with the withdrawal of gases against their natural flow and from some considerable spacing with overhead suction devices.
The intakes are preferably flat, flaring ducts with open inner sides facing the patient's cheeks, and open front ends facing forwards. The open front ends preferably extend from the temple to the chin of the patient.
It has been found that a front end width of 11/2 inches (3.8 cm) will draw a sufficient volume of air at a velocity low enough to minimize the noise produced. The intakes may be mounted for adjustment relative to the pdlient. This may be done by mounting the intakes for rotation on telescopic suction ducts that allow adjustment of the intakes laterally, towards and away from one another. It is also prefer,ed that the intakes are made from a relatively soft material that is at least slightly deformable to allow the intakes to be shaped to conform closely with the patient's face. This reduces the intake of air from locations other than along the patient's cheeks and thus improves efficiency.
CA 0220~98~ l997-0~-23 WO 96/06651 PC~J~A9SJ~050 In some applications, the apparatus may be installed permanently, lFor example on a dental chair. In other applications, the apparatus may be portable.
BRIEF DES~..IPIllON OF THE DRAWINGS
~ n the accompanying drawings, which illustrate an exemplary embodiment of 1:he present invention:
Figure 1 is a front view of an apparatus according to the present invention:
Fi~lJre 2 is a back view of the apparatus;
Fi!aure 3 is a top view of the apparatus;
Fi~ re 4 is a side view of the apparatus; and Figure 5 is an inside view of an intake.
DETAILED DESC:RIPTION
The terms "frontn, "backn, "top" and "side" are all used relative to a patient's head since the absolute orienlalion of the apparatus is dependent on 1:he actual orientation of the patient at the time of use.
Referring to the accompanying drawings, there is illustrated a gas evacuation apparatus 10 shown associated with the head rest of an existing dental chair 12, partially illustrated in broken lines. Figures 1 and 3of the drawings also show a patient's head 14 associated with the apparatus.
The evacuation apparatus includes two inlet intakes 16 that are, in use, positionled on opposite sides of the patient's head, adjacent the cheeks. Each iintake has an open inner side 18 confronting the adjacent cheek of the welarer, an open front end 20 and an opposite exhaust end 22.
Each intake is generally rectangular in cross section and flares in height from the exhaust end 22 to the front end 20. The intakes are made from a CA 0220~98~ 1997-0~-23 resilient rubber material that is somewhat deformable so that its shape can be altered to match that of the patient's face.
The exhaust end 22 of each intake is connected to a duct 24.
The duct has a l.dnsilion section 26 with a rectangular section front end 28 connected to the exhaust end 22 of the intake and a circular cross section back end 30. The duct has a rear cylindrical section 32 that slides telescopically, front to back, in an adjustment sleeve 34 SO that the fore and aft position of the intake can be adjusted. The cylindrical section 32 also rotates in the sleeve 34 SO that the intake can be arranged parallel to the adjacent cheek of a patient.
The adju~l."e"l sleeve 34 iS connected to an elbow 36 which in turn is connected to an upright duct section 38. The connections of the adjustment sleeve 34 to the intake and the elbow are efrecled by rubber seals that allow the lateral adjustment of the intake against the face of a patient.
The two duct sections 38 connect to inlets at the opposi~e ends of a lateral manifold 40. The manifold has a center outlet 44 connected to an exhaust duct 46 leading to a vacuum source 48 that creates a low pressure in the complete evacuation system, thus creali--g Iow pressure zones in the intakes, at the patient's cheeks.
In use, the intakes are located on opposite sides of the patient's head, at the cheeks. The intakes are surrici.:"ll~y wide that the low pressure area in them will create a flow of air across the patient's face from above the nose to the chin and following the contours of the face. Medical gases escaping from a nose cup, a face mask or exhaled by the patient, fumes, mists and particulates will thus be drawn across the patient's face and into the intakes, which are positioned to take advantage of their natural CA 0220~98~ 1997-0~-23 downward flow. The open inner side of the intake effectively uses the patient's face itself as the inner wall of the intake so as to provide a very large intake area and to minimize the opportunity for gas to escape along the patient's face.
With the use of this apparatus, the patient's face is minimally obstructed so 1hat the mouth and nose are accessible for the application of gas in a convenltional way or for such other procedures as dental Ireal~enl.
It has been found that the apparatus is also useful in evacuating the mists, fumes and low velocity particulates generated in surgical and dental procedures .
While one embodiment of the present invention has been described in the foregoing, it is to be understood that other embodiments are possible within the scope of the invention. For example, the illuslrdled embodiment is s;hown as attached to a chair such as used in a dental clinic.
In other applications, for example in operaling theaters, other physical arrangements of the evacuation ducting may be employed. Both permanent and portable irstallations are possible. The invention is therefore not to be considered limited to the exe""~la"~ embodiment described above, but only by the scope of the appended claims.
Claims (11)
1. A method of evacuating gases and airborne contaminants from adjacent the face of a patient, said method comprising creating an area of low pressure adjacent the patient's face and collecting gases flowing into the low pressure area, characterised in that low pressure areas are produced on opposite sides of the patient's face, beside the patient's cheeks.
2. A method according to Claim 1 comprising creating the low pressure aleas by placing gas intakes on respective opposite sides of the patient's head, and applying a suction to said intakes.
3. A method according to Claim 1 or 2 wherein the low pressure areas extend from temple to chin on the patient's face.
4. A medical gas evacuation apparatus for withdrawing gas from adjacenlt the face of a patient, said apparatus comprising gas intake means, support means for supporting the intake means adjacent the patient's face and suction means for drawing air and the medical gas into the inlet means and collecting the gas so drawn in, characterised in that:
the gas intake means comprise two gas intakes;
the support means support the respective gas intakes on respective opposite sides of the patient's face, at the cheeks.
the gas intake means comprise two gas intakes;
the support means support the respective gas intakes on respective opposite sides of the patient's face, at the cheeks.
5. Apparatus according to Claim 4 wherein each gas intake means comprises an intake with an open end and an open side and the suction means comprise a duct secured to an exhaust end of the intake opposite the open end.
6. Apparatus according to Claim 4 or 5 wherein the support means comprise means mounting the intake for selective movement with respect to the patient's face.
7. Apparatus according to Claim 6 wherein the support means comprise means mounting the intakes for movement laterally of the patient's face.
8. Apparatus according to Claim 6 or 7 wherein the support means comprise means mounting each intake for rotation of the intake.
9. Apparatus according to Claim 6, 7 or 8 wherein the support means comprise means for moving each intake fore and aft beside the patient's head.
10. Apparatus according to any one of Claims 5 to 9 wherein each intake is generally rectangular in cross section and flares in height from the exhaust end to the open end.
11. Apparatus according to any one of Claims 5 to 10 wherein each intake is made from a deformable material.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US299,525 | 1994-09-01 | ||
| US08/299,525 US5513632A (en) | 1994-09-01 | 1994-09-01 | Ventilation of medical gases |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2205985A1 true CA2205985A1 (en) | 1996-03-07 |
Family
ID=23155187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002205985A Abandoned CA2205985A1 (en) | 1994-09-01 | 1995-09-01 | Ventilation of medical gases |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5513632A (en) |
| EP (1) | EP0935477A1 (en) |
| AU (1) | AU3250695A (en) |
| CA (1) | CA2205985A1 (en) |
| WO (1) | WO1996006651A1 (en) |
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6308707B1 (en) * | 1999-02-10 | 2001-10-30 | Li-Chow Lu | Vacuum equipment for medical tables |
| AU2003230855A1 (en) | 2002-04-08 | 2003-10-27 | Joseph Manne | Air curtain |
| AU2003259270A1 (en) * | 2002-07-26 | 2004-02-16 | University Of Medicine And Dentistry Of New Jersey | Method and apparatus for evacuating nitrous oxide |
| US20070044794A1 (en) * | 2003-11-10 | 2007-03-01 | Ivan Sabesky | Ventilation system for medical gases |
| US8001968B2 (en) * | 2007-05-09 | 2011-08-23 | Doty Robert H | Apparatus for delivering and/or scavenging gas in the nose/mouth area of a patient |
| US8291905B2 (en) * | 2008-11-19 | 2012-10-23 | Moenning Jr John Edward | Combination anesthesia and scavenger surgical mask |
| US8539953B2 (en) * | 2008-11-19 | 2013-09-24 | John E. Moenning, Jr. | Combination anesthesia and scavenger surgical mask |
| CA2844454C (en) | 2013-03-08 | 2017-07-11 | Teleflex Medical Incorporated | Exhalation scavenging therapy mask |
| US10537754B1 (en) * | 2016-04-18 | 2020-01-21 | Nicholas Vukelja | Personal air purification device and related methods |
| DK3360508T3 (en) * | 2017-02-13 | 2020-01-13 | Astradentium Health Tech S L | DENTAL TREATMENT ASSIST |
| US11571287B1 (en) * | 2020-04-19 | 2023-02-07 | David H. Roholt | System for removing aerosol contaminants created during a medical or dental procedure |
| US11786349B1 (en) * | 2020-05-15 | 2023-10-17 | James Mah | Protective devices for managing aerodynamics around dental patients |
| US11918068B2 (en) * | 2020-05-18 | 2024-03-05 | James Scott Hay | Sterilization systems and methods of use thereof |
| IT202000014245A1 (en) * | 2020-06-15 | 2021-12-15 | Airbox Srl | FLAP APPENDIX FOR SUCTION HOOD ON ARTICULATED ARM |
| US11358084B2 (en) * | 2020-07-16 | 2022-06-14 | Aerocontain Technologies Inc. | Patient aerosol protection |
| US11358011B2 (en) * | 2020-07-16 | 2022-06-14 | Aerocontain Technologies Inc. | Aerosol protection helmet |
| US20220062083A1 (en) * | 2020-08-28 | 2022-03-03 | Robert Hazany | Suction device for suctioning, aerosols, saliva, blood, serum and or any other liquid from procedures or surgeries done on humans or animals |
| DE102020122882B4 (en) | 2020-09-01 | 2023-01-26 | Sycotec Gmbh & Co. Kg | Device for discharging aerosols |
| US11534256B2 (en) | 2020-09-03 | 2022-12-27 | Mujahid A. Asamarai | Dental aerosol protection system |
| WO2022056178A1 (en) * | 2020-09-09 | 2022-03-17 | Loma Linda University | Evacuation dam frame |
Family Cites Families (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US870407A (en) * | 1907-05-17 | 1907-11-05 | A L Trevaskis | Fresh-air conveyer. |
| US3130722A (en) * | 1959-09-08 | 1964-04-28 | Protective Treat S Inc | Respiratory mask |
| US3625207A (en) * | 1970-06-18 | 1971-12-07 | Boyd F Agnew | Respiratory mask and ducting |
| US3804086A (en) * | 1971-11-12 | 1974-04-16 | B Agnew | Surgical vacuum apparel |
| US3820536A (en) * | 1972-01-10 | 1974-06-28 | W Anspach | Apparatus for providing clean air at a surgical area |
| US3877691A (en) * | 1972-09-12 | 1975-04-15 | Beatrice D Foster | Shield for venting gases away from anesthesiologist |
| US4015598A (en) * | 1975-09-05 | 1977-04-05 | Brown Glenn E | Anaesthesic system |
| US4109651A (en) * | 1975-11-19 | 1978-08-29 | Steigerwald Allan M | Anesthetic gas exhaust system |
| US4082092A (en) * | 1976-05-11 | 1978-04-04 | Foster Beatrice D | Vacuum cabinet and gas venting shield |
| GB2048081B (en) * | 1979-05-01 | 1983-05-18 | Douglas A S M | Apparatus for controlling exhaled breath |
| JPS6057345B2 (en) * | 1981-09-04 | 1985-12-14 | 義一 多田 | Contamination purification method and contamination purification device for dental clinic |
| US4468825A (en) * | 1983-01-28 | 1984-09-04 | Hobbs James R | Oxygen removal system for a bed |
| SE449442B (en) * | 1984-10-04 | 1987-05-04 | Allan Lindkvist | DEVICE FOR PREPARING OR REMOVING EXHAUST AIR FROM PATIENTS |
| US4848366A (en) * | 1986-08-12 | 1989-07-18 | Cybernetic Systems, Inc. | Exhaust mask system and device |
| US4840169A (en) * | 1986-11-13 | 1989-06-20 | Fred Folsom | Ventilation system for artists |
| US4807617A (en) * | 1988-02-01 | 1989-02-28 | Massachusetts Eye And Ear Infirmary | Scavenging mask |
| US4865049A (en) * | 1988-03-21 | 1989-09-12 | Gatti John E | Smoke eliminating shield for electrocautery surgery |
| SE463494B (en) * | 1988-04-22 | 1990-12-03 | Boerje Williamsson | EXHAUST COVER FOR EXHAUST AIR |
| US5127411A (en) * | 1988-10-12 | 1992-07-07 | Arnold Schoolman | Oral appliance for removing aerosols produced during dentistry |
| US4949714A (en) * | 1989-07-26 | 1990-08-21 | Viratek Inc. | Scavenging medical hood |
| US5195512A (en) * | 1991-12-31 | 1993-03-23 | Sunny Rosso | Apparatus for evacuating excess gases from surgery patient's face |
| DE4307754A1 (en) * | 1992-07-23 | 1994-04-07 | Johannes Dipl Ing Geisen | System and method for the controlled supply or removal of breathing air |
| US5267557A (en) * | 1992-08-17 | 1993-12-07 | Her Mou Lin | Nose mask with a filtering device |
-
1994
- 1994-09-01 US US08/299,525 patent/US5513632A/en not_active Expired - Fee Related
-
1995
- 1995-09-01 AU AU32506/95A patent/AU3250695A/en not_active Abandoned
- 1995-09-01 EP EP95928926A patent/EP0935477A1/en not_active Withdrawn
- 1995-09-01 WO PCT/CA1995/000504 patent/WO1996006651A1/en not_active Application Discontinuation
- 1995-09-01 CA CA002205985A patent/CA2205985A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| US5513632A (en) | 1996-05-07 |
| WO1996006651A1 (en) | 1996-03-07 |
| EP0935477A1 (en) | 1999-08-18 |
| AU3250695A (en) | 1996-03-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |