CA2003826A1 - Valve device - Google Patents
Valve deviceInfo
- Publication number
- CA2003826A1 CA2003826A1 CA 2003826 CA2003826A CA2003826A1 CA 2003826 A1 CA2003826 A1 CA 2003826A1 CA 2003826 CA2003826 CA 2003826 CA 2003826 A CA2003826 A CA 2003826A CA 2003826 A1 CA2003826 A1 CA 2003826A1
- Authority
- CA
- Canada
- Prior art keywords
- valve device
- inflatable members
- branch lines
- members
- inflation
- 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
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B17/12099—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder
- A61B17/12109—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder in a blood vessel
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B17/12027—Type of occlusion
- A61B17/1204—Type of occlusion temporary occlusion
- A61B17/12045—Type of occlusion temporary occlusion double occlusion, e.g. during anastomosis
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B17/12131—Occluding by internal devices, e.g. balloons or releasable wires characterised by the type of occluding device
- A61B17/12136—Balloons
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B2017/12127—Double occlusion, e.g. for creating blood-free anastomosis site
Landscapes
- Health & Medical Sciences (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Reproductive Health (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
ABSTRACT
A valve device for providing an occlusion in a blood vessel to restrict or prevent blood flow to a site where surgery is being performed. The valve device comprising a delivery line 11 having two resiliently flexible branch lines 13 at one end. An inflatable member 15 is fitted onto the outer end of each branch line. The other end of the delivery line 11 is connected to a source 17 of inflation fluid for inflating the inflatable members. The inflatable members can be inserted into a blood vessel through a surgical incision in the vessel and on inflation the inflatable members sealingly engage the interior surface of the blood vessel to establish an occlusion on each side of the incision.
A valve device for providing an occlusion in a blood vessel to restrict or prevent blood flow to a site where surgery is being performed. The valve device comprising a delivery line 11 having two resiliently flexible branch lines 13 at one end. An inflatable member 15 is fitted onto the outer end of each branch line. The other end of the delivery line 11 is connected to a source 17 of inflation fluid for inflating the inflatable members. The inflatable members can be inserted into a blood vessel through a surgical incision in the vessel and on inflation the inflatable members sealingly engage the interior surface of the blood vessel to establish an occlusion on each side of the incision.
Description
FIELD OF THE INVENTION
THIS INVENTION relates to a valve device for temporarily blocking a fluid flow line.
BACKGRoUND TO THE INVENTION
The invention has been devised particularly, although not exclusively, for use in surgical applications where it is necessary to provide an occlusion in blood vessels such as arteries.
Where a patient is undergoing surgery and it is necessary to restrict or prevent blood flow to the surgical site, it is usual to provide occlusions in blood vessels in the locality of the site. Conventionally, the occlusions are provided by applying clamps, snares or tapes to the outside of the blood vessels and crimping the lumins of the blood vessels to block blood flow. This procedure has a number of disadvantages, one of which i~ that it is generally necessary to dissect the blood vessel from its anatomical position in the body of the patient to provide full circumferential access to the blood vessel to allow for the occlusion.
SUMMARY OF THE INVENTION
The present invention seeks to provide a novel and useful means for providing an occlusion in a fluid flow passage such as a blood vessel.
In one form the invention resides in a valve device comprising a pair of inflatable members, and a delivery line one~ end olf whicih is in communication with said inflatable members and the other end of which is connectable to a source of inflation fluid.
:
, :
, :~:
', : ~
~, . :.
Preferably said one end of the delivery line includes two branch lines each of which is connected to a respective one of the inflatable members.
Preferably, said branch lines are substantially rigid so as to maintain the inflatable members in spaced relationship while being sufficiently resilient to allow deflection for insertion of the inflatable members into, and removal of the inflation members from, a fluid flow ,. . ..
line.
': :
Preferably said branch lines are arranged in a substantially V formation when said inflation members are in said spaced relationship. -Preferably said branch lines can resiliently deflect towards eachother into substantially side-by-side relationship. -;~
Preferably said branch lines are of different lengths - -~
whereby said inflatable members are offset from one another when said branch lines are in said side-by-side relationship.
:: ~- - -Preferably, said inflatable members comprise balloons fitted onto the ends of the branch line. Conveniently, the baIloons are made of latex material.
PreferabIy, said delivery line is flexible.
Preferabay, thel' inflation fluid~is a liguid. Where ! bhe~
,.~ .,. ,:- . .:
valve apparatus is to be used in surgical applications, tho liquid preferably comprises an isotonic liquid.
Preferably, the source of inflation fluid comprises a syringe having inflation fluid in its barrel.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be better under6tood by reference to the following description of speclfic embodiment thereof and shown in the accompanying drawings in which:
Fig. 1 is a schematic perspective view (on an enlarged scale) of a valve device according to the embodiment;
Fig. 2 is a fragmentary view of the valve device showing the branch lines and inflatable members in spaced relationship;
,, Fig. 3 is a view similar to Fig. 2 except that the branch lines are shown in side-by-side relation;
Fig. 4 is a schematic view illustrating the valve device being inserted into a blood vessel through a surgical incision in the vessel;
Fig. 5 is a schematic view illustrating the valve device in position in the blood vessel prior to inflation of the inflatable members;
Fig. 6 is a view similar to Fig. 5 except that the inflatable members are shown in an inflated condition so as to provide an occlusion in the blood vessel; and Fig. 7 is a schematic view illustrating the valve device being withdrawn from the blood vessel towards the end of a grafting procedure.
DESCRIPTION OF PREFERRE~ EMBODIMENT
The embodiment shown in the drawings is directed to a valve device for surgical applications to provide an occlusion `in a~'bloodii ve6sel 6uch as,i an !~ artery, particularly for bypass grafting or vessel repair.
Th~e;~valve device compri6es a flexible fluid delivery line 11 having a pair of branch lines 13 at one of its ends.
: , ~
. , : :, -. . .: : ::
, ~
' ~ ~ ~ ,":';
::~
An inflatable member 15 in the form of a latex balloon is fitted onto the outer end of each branch line.
,~, ., The branch lines 13 are arranged in a V formation. The branch lines 13 are formed of resiliently flexible tube material which normally maintains the inflatable in spaced relationship ~as shown in Fig. 2) but which can resiliently deflect to allow the branch lines 13 to assume a position in which they are in side-by-side relation (as shown in Fig. 3). So that the inflatable members are ;~
off et from eachother when the branch lines 13 are in side-by-side relation (as best seen in Fig. 3), the branch lines are different from eachother in length. ~
' ~' ~ .', The end of the fluid delivery line 11 opposite the branch liens 13 is adapted for connection to a source 17 of `- -inflation fluid such as a syringe containing such fluid.
A reference mark 19 is provided on the syringe 17 and the position of the syringe is aligned with the reference mark when the inflatable members 15 are in the deflated condition. In this embodiment the inflation fluid comprises an isotonic liquid.
Operation of the valve devioe will now be described in -relation to a surgical operation which involves grafting a graft vessel 20 onto an existing blood vessel 21, as ~ , illustrated in in Pigs. 4 to 7 of the accompanying drawings-(where both the blood vessel and graft vessel are depicted by broken lines). During the surgical operation, it is necessary to provide an occlusion in the blood vessel ~1 and theldevice according to the~embodimentic!an be used to provide such occlusion. During the procedure, a surgiaal incision 23 is formed in the side wall of the blood vessel 21 and the branch lines 13 of the valve dsvice~ are inserted into the lumen of the blood ves~el 21 suoh~that one inflatable member 15 is disposed to each side of, and spaced inwardly from the incision 23, as illustrated in Figs. 4 and 5 of the drawings. ~he syringe 17 is then operated to introduce inflation fluid into the inflatable members 15 via the delivery line 11 and the branch lines 13. The inflatable members 15 expand and sealingly engage against the inner wall of the blood vessel 21 and block blood flow therealong, as illustrated in Fig. 6 of the drawings.
Because the inflatable members 15 are in fluid communication with eachother by way of the branch lines and the delivery line, the pressure within the chambers can equalise. This allows the inflatable members to accommodate situations where the vessel lumen differs in cross-section size on opposed sides of the surgical incision.
Once the occlusion has been established in the blood vessel, the graft vessel 20 can be sutured to the blood vessel 21 in conventional manner. ~he final few sutures are, however, left loose so that the occlusion can be removed. The plunger of the syringe i8 then retracted to the reference mark 19 so as to draw the inflation fluid back into the syringe and so deflate the inflatable members. Following their deflation, the inflatable members can be removed from the blood vessel by gently pulling on the delivery line. As the branch lines leave the blood vessel 21 they are urged towards eachother to asæume said side-by-side relation for convenient passage through the loose sutures. Because the inflatable members are offsèt from'eachother at this;stage, one follow8 the other through the loose sutures without damaging the suture8 or the grafted ve8sel8. When the valve device has been removed from the surgical site, the ioose sutures can be pulled tight and tied.
From the foregoing it is evident that the present :~ :
invention enables a temporary occlusion to be established in a blood vessel in a relatively convenient and easy , manner.
Although the invention has been described with reference to one specific embodiment it should be appreciated that ~ :
it is not limited to such embodiment and that the valve .
device may have applications in fields other than ~
formation of occlusions in blood vessels during surgical - ~ :
procedures.
:~: """'.,",'"", ~ - ~
t ~:
THIS INVENTION relates to a valve device for temporarily blocking a fluid flow line.
BACKGRoUND TO THE INVENTION
The invention has been devised particularly, although not exclusively, for use in surgical applications where it is necessary to provide an occlusion in blood vessels such as arteries.
Where a patient is undergoing surgery and it is necessary to restrict or prevent blood flow to the surgical site, it is usual to provide occlusions in blood vessels in the locality of the site. Conventionally, the occlusions are provided by applying clamps, snares or tapes to the outside of the blood vessels and crimping the lumins of the blood vessels to block blood flow. This procedure has a number of disadvantages, one of which i~ that it is generally necessary to dissect the blood vessel from its anatomical position in the body of the patient to provide full circumferential access to the blood vessel to allow for the occlusion.
SUMMARY OF THE INVENTION
The present invention seeks to provide a novel and useful means for providing an occlusion in a fluid flow passage such as a blood vessel.
In one form the invention resides in a valve device comprising a pair of inflatable members, and a delivery line one~ end olf whicih is in communication with said inflatable members and the other end of which is connectable to a source of inflation fluid.
:
, :
, :~:
', : ~
~, . :.
Preferably said one end of the delivery line includes two branch lines each of which is connected to a respective one of the inflatable members.
Preferably, said branch lines are substantially rigid so as to maintain the inflatable members in spaced relationship while being sufficiently resilient to allow deflection for insertion of the inflatable members into, and removal of the inflation members from, a fluid flow ,. . ..
line.
': :
Preferably said branch lines are arranged in a substantially V formation when said inflation members are in said spaced relationship. -Preferably said branch lines can resiliently deflect towards eachother into substantially side-by-side relationship. -;~
Preferably said branch lines are of different lengths - -~
whereby said inflatable members are offset from one another when said branch lines are in said side-by-side relationship.
:: ~- - -Preferably, said inflatable members comprise balloons fitted onto the ends of the branch line. Conveniently, the baIloons are made of latex material.
PreferabIy, said delivery line is flexible.
Preferabay, thel' inflation fluid~is a liguid. Where ! bhe~
,.~ .,. ,:- . .:
valve apparatus is to be used in surgical applications, tho liquid preferably comprises an isotonic liquid.
Preferably, the source of inflation fluid comprises a syringe having inflation fluid in its barrel.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be better under6tood by reference to the following description of speclfic embodiment thereof and shown in the accompanying drawings in which:
Fig. 1 is a schematic perspective view (on an enlarged scale) of a valve device according to the embodiment;
Fig. 2 is a fragmentary view of the valve device showing the branch lines and inflatable members in spaced relationship;
,, Fig. 3 is a view similar to Fig. 2 except that the branch lines are shown in side-by-side relation;
Fig. 4 is a schematic view illustrating the valve device being inserted into a blood vessel through a surgical incision in the vessel;
Fig. 5 is a schematic view illustrating the valve device in position in the blood vessel prior to inflation of the inflatable members;
Fig. 6 is a view similar to Fig. 5 except that the inflatable members are shown in an inflated condition so as to provide an occlusion in the blood vessel; and Fig. 7 is a schematic view illustrating the valve device being withdrawn from the blood vessel towards the end of a grafting procedure.
DESCRIPTION OF PREFERRE~ EMBODIMENT
The embodiment shown in the drawings is directed to a valve device for surgical applications to provide an occlusion `in a~'bloodii ve6sel 6uch as,i an !~ artery, particularly for bypass grafting or vessel repair.
Th~e;~valve device compri6es a flexible fluid delivery line 11 having a pair of branch lines 13 at one of its ends.
: , ~
. , : :, -. . .: : ::
, ~
' ~ ~ ~ ,":';
::~
An inflatable member 15 in the form of a latex balloon is fitted onto the outer end of each branch line.
,~, ., The branch lines 13 are arranged in a V formation. The branch lines 13 are formed of resiliently flexible tube material which normally maintains the inflatable in spaced relationship ~as shown in Fig. 2) but which can resiliently deflect to allow the branch lines 13 to assume a position in which they are in side-by-side relation (as shown in Fig. 3). So that the inflatable members are ;~
off et from eachother when the branch lines 13 are in side-by-side relation (as best seen in Fig. 3), the branch lines are different from eachother in length. ~
' ~' ~ .', The end of the fluid delivery line 11 opposite the branch liens 13 is adapted for connection to a source 17 of `- -inflation fluid such as a syringe containing such fluid.
A reference mark 19 is provided on the syringe 17 and the position of the syringe is aligned with the reference mark when the inflatable members 15 are in the deflated condition. In this embodiment the inflation fluid comprises an isotonic liquid.
Operation of the valve devioe will now be described in -relation to a surgical operation which involves grafting a graft vessel 20 onto an existing blood vessel 21, as ~ , illustrated in in Pigs. 4 to 7 of the accompanying drawings-(where both the blood vessel and graft vessel are depicted by broken lines). During the surgical operation, it is necessary to provide an occlusion in the blood vessel ~1 and theldevice according to the~embodimentic!an be used to provide such occlusion. During the procedure, a surgiaal incision 23 is formed in the side wall of the blood vessel 21 and the branch lines 13 of the valve dsvice~ are inserted into the lumen of the blood ves~el 21 suoh~that one inflatable member 15 is disposed to each side of, and spaced inwardly from the incision 23, as illustrated in Figs. 4 and 5 of the drawings. ~he syringe 17 is then operated to introduce inflation fluid into the inflatable members 15 via the delivery line 11 and the branch lines 13. The inflatable members 15 expand and sealingly engage against the inner wall of the blood vessel 21 and block blood flow therealong, as illustrated in Fig. 6 of the drawings.
Because the inflatable members 15 are in fluid communication with eachother by way of the branch lines and the delivery line, the pressure within the chambers can equalise. This allows the inflatable members to accommodate situations where the vessel lumen differs in cross-section size on opposed sides of the surgical incision.
Once the occlusion has been established in the blood vessel, the graft vessel 20 can be sutured to the blood vessel 21 in conventional manner. ~he final few sutures are, however, left loose so that the occlusion can be removed. The plunger of the syringe i8 then retracted to the reference mark 19 so as to draw the inflation fluid back into the syringe and so deflate the inflatable members. Following their deflation, the inflatable members can be removed from the blood vessel by gently pulling on the delivery line. As the branch lines leave the blood vessel 21 they are urged towards eachother to asæume said side-by-side relation for convenient passage through the loose sutures. Because the inflatable members are offsèt from'eachother at this;stage, one follow8 the other through the loose sutures without damaging the suture8 or the grafted ve8sel8. When the valve device has been removed from the surgical site, the ioose sutures can be pulled tight and tied.
From the foregoing it is evident that the present :~ :
invention enables a temporary occlusion to be established in a blood vessel in a relatively convenient and easy , manner.
Although the invention has been described with reference to one specific embodiment it should be appreciated that ~ :
it is not limited to such embodiment and that the valve .
device may have applications in fields other than ~
formation of occlusions in blood vessels during surgical - ~ :
procedures.
:~: """'.,",'"", ~ - ~
t ~:
Claims (10)
1. A valve device comprising a pair of inflatable members, and a delivery line one end of which is in communication with said inflatable members and the other end of which is connectable to a source of inflation fluid.
2. A valve device according to claim 1 wherein said one end of the delivery line includes two branch lines each of which is connected to a respective one of the inflatable members.
3. A valve device according to claim 2 wherein said branch lines are substantially rigid so as to maintain the inflatable members in spaced relationship while being sufficiently resilient to allow deflection for insertion of the inflatable members into, and removal of the inflation members from, a fluid flow line.
4. A valve device according to claim 2 or 3 wherein said branch lines are arranged in a substantially V
formation when said inflation members are in said spaced relationship.
formation when said inflation members are in said spaced relationship.
5. A valve device according to claim 4 wherein said branch lines can resiliently deflect towards eachother into substantially side-by-side relationship.
6. A valve device according to claim 5 wherein said branch lines are of different lengths whereby said inflatable members are offset from one another when said branch lines are in said side-by-side relationship.
7. A valve device according to any one of the preceding claims wherein said inflatable members comprise balloons fitted onto the ends of the branch line.
8. A valve device according to any one of the preceding claims wherein said delivery line is flexible.
9. A valve device according to any one of the preceding claims wherein the source of inflation fluid comprises a syringe having inflation fluid in its barrel.
10. A valve device substantially as herein described with reference to the accompanying drawings.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPJ168288 | 1988-11-25 | ||
| AUPJ1682 | 1988-11-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2003826A1 true CA2003826A1 (en) | 1990-05-25 |
Family
ID=3773543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2003826 Abandoned CA2003826A1 (en) | 1988-11-25 | 1989-11-24 | Valve device |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA2003826A1 (en) |
| WO (1) | WO1990006086A1 (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU1017900A (en) * | 1998-11-02 | 2000-05-22 | Pro-Med Technology Consult Medizinisch-Technische Gerate Gmb H | End piece for a catheter or the like, perfusion catheter and perfusion catheter systems |
| AT406336B (en) * | 1998-11-02 | 2000-04-25 | Pro Med Gmbh | Catheter for intravascular connection of two vessel sections |
| US6527761B1 (en) * | 2000-10-27 | 2003-03-04 | Pulmonx, Inc. | Methods and devices for obstructing and aspirating lung tissue segments |
| US9987153B2 (en) | 2010-06-08 | 2018-06-05 | The Regents Of The University Of Minnesota | Vascular elastance |
| US9017359B2 (en) | 2010-11-22 | 2015-04-28 | Aria Cv, Inc. | System and method for reducing pulsatile pressure |
| FR3016279A1 (en) * | 2014-01-15 | 2015-07-17 | Jacques Seguin | DEVICE FOR TREATING PULMONARY ARTERIAL HYPERTENSION |
| US9421017B2 (en) | 2014-01-15 | 2016-08-23 | Jacques Seguin | Methods and apparatus using branched balloon for treating pulmonary arterial hypertension |
| US9427236B2 (en) | 2014-01-31 | 2016-08-30 | Jacques Seguin | Methods and apparatus using an anchored balloon for treating pulmonary arterial hypertension |
| US8876850B1 (en) | 2014-06-19 | 2014-11-04 | Aria Cv, Inc. | Systems and methods for treating pulmonary hypertension |
| US11331105B2 (en) | 2016-10-19 | 2022-05-17 | Aria Cv, Inc. | Diffusion resistant implantable devices for reducing pulsatile pressure |
| EP4025287A1 (en) | 2019-09-06 | 2022-07-13 | Aria CV, Inc. | Diffusion and infusion resistant implantable devices for reducing pulsatile pressure |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2493326A (en) * | 1949-03-01 | 1950-01-03 | John H Trinder | Tampon for control of intractable nasal hemorrhages |
| US3411506A (en) * | 1966-04-11 | 1968-11-19 | Velasco Adolfo Guevara | Method and apparatus for hemostasis |
| CA976825A (en) * | 1969-11-21 | 1975-10-28 | James A. Hunter | Occlusion device and method and apparatus for inserting the same |
| US3850176A (en) * | 1972-02-07 | 1974-11-26 | G Gottschalk | Nasal tampon |
| US4149539A (en) * | 1977-08-03 | 1979-04-17 | The Kendall Company | Hemostatic device |
| US4230119A (en) * | 1978-12-01 | 1980-10-28 | Medical Engineering Corp. | Micro-hemostat |
| US4395806A (en) * | 1980-05-08 | 1983-08-02 | Sorenson Research Co., Inc. | Method of manufacturing a detachable balloon catheter assembly |
| US4404971A (en) * | 1981-04-03 | 1983-09-20 | Leveen Harry H | Dual balloon catheter |
| DE3118731C2 (en) * | 1981-05-12 | 1983-12-01 | MANIBS R. Mannesmann GmbH & ibs Nagel GmbH & Co KG, 5630 Remscheid | Device for shutting off a gas line |
-
1989
- 1989-11-24 CA CA 2003826 patent/CA2003826A1/en not_active Abandoned
- 1989-11-24 WO PCT/AU1989/000511 patent/WO1990006086A1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| WO1990006086A1 (en) | 1990-06-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |