CA2311977A1 - Method for delivering a fluid into a vessel of a human body, and improved cannula useful for carrying out the method - Google Patents
Method for delivering a fluid into a vessel of a human body, and improved cannula useful for carrying out the method Download PDFInfo
- Publication number
- CA2311977A1 CA2311977A1 CA 2311977 CA2311977A CA2311977A1 CA 2311977 A1 CA2311977 A1 CA 2311977A1 CA 2311977 CA2311977 CA 2311977 CA 2311977 A CA2311977 A CA 2311977A CA 2311977 A1 CA2311977 A1 CA 2311977A1
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- CA
- Canada
- Prior art keywords
- fluid
- cannula
- vessel
- tubular body
- swirl
- 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
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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
- A61M25/00—Catheters; Hollow probes
- A61M25/0067—Catheters; Hollow probes characterised by the distal end, e.g. tips
- A61M25/0068—Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
-
- 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
- A61M25/00—Catheters; Hollow probes
-
- 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
- A61M25/00—Catheters; Hollow probes
- A61M25/0067—Catheters; Hollow probes characterised by the distal end, e.g. tips
- A61M25/0068—Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
- A61M2025/0073—Tip designed for influencing the flow or the flow velocity of the fluid, e.g. inserts for twisted or vortex flow
-
- 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
- A61M2210/00—Anatomical parts of the body
- A61M2210/12—Blood circulatory system
- A61M2210/127—Aorta
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biophysics (AREA)
- Pulmonology (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- External Artificial Organs (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
A method for delivering a fluid into a vessel, in particular into an aortic arch, includes the step of imposing on each fluid particle an axial motion as well as a whirling motion when entering the vessel. Hereby, a novel and inventive cannula which includes a tubular body; and a device for imposing a whirling motion on each fluid particle of a fluid entering through the tubular body into a vessel.
Description
METHOD FOR DELIVERING A FLUID INTO A VESSEL OF A
2 HUMAN BODY, AND IMPROVED CANNULA USEFUL FOR
CROSS-REFERENCES TO RELATED APPLICATIONS
7 This application claims the priority of German Patent Applications, Serial 8 No. 199 28 018.5, filed June 18, 1999, and Serial No. 199 33 171.5, filed July 15, 9 1999, the subject matter of which is incorporated herein by reference.
13 The present invention relates to a method for delivering a fluid into a 14 vessel of a human body, and to a cannula useful to carry out the method.
More particularly, the present invention relates to the delivery of a fluid, such as blood, 16 into blood vessel, preferably into an aortic arch.
18 Delivery of fluid into body vessels entails the risk that a fluid stream is 19 "jetted" out from a respective cannula and thereby exposes a proximate vessel wall to significant stress. In particular in older patients, this stress cause by the 21 exiting jet stream may dislodge sclerotic deposits which are then flushed into the 22 blood circulation. This may lead i.a, to a clogging of vessels and to embolism.
. CA 02311977 2000-06-19 1 To counter this, U.S_ Pat. Nos. 5,354,288 and 5,843,226 propose to 2 provide a deflector in the outlet zone of the cannula, whereby the deflector may 3 have a drop shape or include a deflector plate on the outlet side. Moreover, U.S.
4 Pat. No. 5,354,288 describes the provision of a diffuser in the outlet zone of the cannula in order to further thwart the formation of a pointedly directed jet stream.
SUMMARY OF THE INVENTION
9 It is thus an object of the present invention to provide an improved method for delivering a fluid into a vessel of the human body, obviating the afore-stated 11 drawbacks.
13 In particular, it is an object of the present invention to provide an improved 14 method for delivering a fluid into a vessel of the human body, by which the pressure applied by the outgoing fluid stream is significantly reduced compared 16 to cornentional methods.
18 These objects, and others which will becorne apparent hereinafter, are 19 attained in accordance with the present invention by a method for delivering a fluid into a vessel, in particular into an aortic arch, which method includes the 21 step of imposing an axial motion as well as a whirling motion upon each fluid 22 particle when the fluid enters the vessel.
1 Conventional methods are incapable to impose such a whirling motion 2 upon all fluid particles because the encountered velocities are too high in the 3 relatively short interactive pathway in order to be able to induce a whirling 4 motion. Moreover, conventional cannulae have parts incorporated therein which lead to a cross sectional constriction immediately before of the entry zone, 6 resulting in an increase of the flow velocity. However, a rise of the flow velocity is, 7 in general, undesired.
9 It is another object of the present invention to provide an improved cannula useful for carrying out the novel and inventive method according to the 11 present invention.
13 This object is attained in accordance with the present invention by 14 providing a tubular body, and a device for imposing a whirling motion upon each fluid particle of a fluid which flows through the lumen of the tubular body into the 16 vessel.
18 According to another feature of the present invention, a swirl-inducing 19 device is accommodated in the tubular body and sv positioned that the cross section of the outlet port of the cannula is not narrowed_ Suitably, the 21 swirl-inducing device should be positioned in an area of the tubular body which is 22 upstream of the narrower entry zone of the tubular body through an opening in 23 the vessel wall so as to prevent a further cross sectional constriction by the 1 swirl-inducing device in this narrower entry zone.
3 Suitably, such a whirling motion of the fluid should be induced before the 4 fluid enters the vessel and should not be generated only through interaction with the vessel.
7 According to another feature of the present invention, a whirling vector a associated to the whirling motion has a component which is oriented in the 9 direction of the remaining motion, i.e. linear motion, of the respective fluid particle. This results in a tendency of the fluid stream to substantially spread out, 11 thereby effectively reducing the stream pressure of the outgoing fluid flow.
13 The whirling motion can be induced in a simple and cost-effective manner 14 especially by a swirl-inducing device, whereby a sufficient interactive zone of the swirl-inducing device should be ensured to attain that all fluid particles are 16 exposed to the whirling motion. This is true in particular when positioning the 17 swirl-inducing device at the end of the cannula. On the other hand, it may be 18 possible to provide an equalizing zone behind the swirl-inducing device in flow 19 direction of the fluid. Fluid particles, already executing a whirling motion, can transmit the whirling motion in the equalizing zone to further fluid particles. Thus, 21 even a shortened interactive zone or a shorter swirl-inducing device can be used 22 while still ensuring that all fluid particles carry out a whirling motion.
The 23 equalizing zone may hereby have characteristics that further impact the flow 1 guidance.
3 It is also possible to provide the swirl-inducing device, as viewed in fluid 4 flow direction, upstream of an angled zone or bend of the cannula, thereby ensuring an improved flow guidance. Even though, various cannulae, in 6 particular aortic cannulae, may differ in the configuration of their angled zone, the 7 remaining zones are effectively standardized and identical. Thus, different 8 cannulae may use a same swirl-inducing device, thereby reducing production 9 costs. Of course, the angled zone may be utilized as equalizing zone as well.
11 According to another feature of the present invention, the swirl-inducing 12 device may be provided upstream of a tapered zone of the cannula, when viewed 13 in flow direction of the fluid_ This, too, results in a better flow guidance and an 14 improved inducement of the whirling motion_ Furthermore, the rotation is accelerated by this tapered configuration so that the whirling motion is 16 significantly higher when the fluid enters the vessel. Of course, such a tapered 17 zone may be combined with an equalizing zone andlor an angled zone of the 1 B tubular body.
BRIEF DESCRIPTION OF THE DRAWING
22 The above and other objects, features and advantages of the present 23 invention will be rnore readily apparent upon reading the following description of . CA 02311977 2000-06-19 1 preferred exemplified embodiments of the invention with reference to the 2 accompanying drawing, in which:
4 FIG. 1 is a schematic illustration of one embodiment of a cannula according to the present invention for delivering a fluid into a vessel; and 7 FIG. 2 is a schematic perspective illustration, on an enlarged scale 8 of another embodiment of a cannula according to the present invention for 9 delivering a fluid into a vessel.
13 Turning now to the drawing, and in particular to F1G. 1, there is shown a 14 schematic illustration of one embodiment of a cannula 2, e.g, an aortic cannula, according to the present invention, for delivering a fluid into a vessel 1, e.g. an 16 aortic arch. The cannula 2 has a generally tubular body which includes a lower 17 portion inserted through an oval opening 3, made through incision in the wall of 18 the aortic arch 1, so that an entry zone 4 of the lower portion of the cannula 2 is 19 positioned inside the aortic arch 1 while a rear portion 5 of the cannula 2 is positioned outside the aortic arch 1. The lower portion, which includes the entry 21 zone 4, has a cross section which is narrower than the remaining portion of the 22 tubular body so that the size of the opening 3 can be kept as small as possible.
23 The cross sectional constriction also results in an increase of the flow velocity in 1 the entry zone 4.
3 Non-rotatably positioned in the rear portion 5 of the cannula 2 is a 4 swirl=inducing device 6 which is suitably secured, e.g. press-fitted or glued, in the lumen of the tubular body and so configured that a whirling motion, i,e.
swirl, is 6 imposed on each fluid particle, moving in axial direction through the lumen of the 7 tubular body of the cannula 2. An equalizing zone 7 is provided between the 8 swirl-inducing device 6 and the narrowed entry zone 4 and represents a 9 transition zone between the wider rear portion 5 and the narrower entry zone 4_ 11 Approximately in the area of the opening 3 through the vessel wall of the 12 aortic arch 1, the tubular body of the cannula 2 has an angled zone or bend 8 to 13 form an arched configuration of the cannula 2 in this area: As clearly shown in 14 FIG. '1, the swirl-inducing device fi is disposed upstream of the bend 8, as viewed in flow direction of the fluid through the cannula 2. Since the cross section 16 upstream of the bend 8 is also narrowed, the swirl-inducing device 6 is suitably 17 disposed in fluid flow direction upstream of the tapered zone of the cannula 2, 19 ~ The swirl-inducing device may be of any suitable configuration that is capable to impose a whirling motion on a fluid stream, e.g., a body having a 21 plurality of guide blades attached to the body in suitable fashion.
23 Fluid, e.g, blood, perfusing through the lumen of the cannula 2, is imparted.
1 a whirling motion by the swirl-inducing device 6, and subsequently flows through 2 the tapered transition zone into the bend 8. These zones constitute also the 3 equalizing zone 7. When entering the aortic arch or vessel 1, each fluid particle 4 has therefore a substantially linear direction of motion as a consequence of the lumen of the tubular body, and a whirling motion as a consequence of the 6 whirling motion generated by the swirl-inducing device 6_ The whirling motion is 7 thereby defined by a whirling vector having a component in parallel relation to the 8 linear motion. This whirling motion results is a rapid spreading out of the exiting 9 stream without jetting so that the emanating fluid stream is gentle on the vessel wall and in particular a dislodging and flushing of sclerotic deposits can be 11 significantly reduced.
13 Turning now to FIG. 2, there is shown a schematic perspective illustration, 14 on an enlarged scale, of another embodiment of a cannula 12 according to the present invention for delivering a fluid into a vessel (not shown here). The 16 cannula 12 has a tubular body which accommodates a swirl-inducing device 16 17 for imposing a whirling motion, indicated by reference numeral 13, upon the fluid 18 flowing in direction of arrow ~ 9. In the nonlimiting example of FIG. 2, the 19 swirl-inducing device 16 has a screw-like or helical configuration, with a thread 16a extending along a central shaft 16b. Downstream of the swirl body 16, 21 the tubular body has in succession an equalizing zone 17, a tapered zone 11 and 22 an angled zone or bend 18. The bend 18 is suitably part of a plug 20, sealingly 23 received in the vessel-near end of the tubular body, and has an outlet port 1 through which the fluid stream 15 emanates from the cannula 12 and enters into 2 the vessel with a whirling motion 13 of the fluid, generated by the swirl-inducing 3 device 16. As a consequence of the whirling motion, the fluid stream has a 4 tendency to spread out so that the stream pressure is effectively reduced when the fluid exits the outlet port 14.
? While the invention has been illustrated and described as embodied in a 8 method for delivering a fluid into a vessel of a human body, and improved 9 cannuia useful for carrying out the method, it is not intended to be limited to the details shown since various modifications and structural changes may be made 11 without departing in any way from the spirit of the present invention.
13 What is claimed as new and desired to be protected by Letters Patent is 14 set forth in the appended claims:
7 This application claims the priority of German Patent Applications, Serial 8 No. 199 28 018.5, filed June 18, 1999, and Serial No. 199 33 171.5, filed July 15, 9 1999, the subject matter of which is incorporated herein by reference.
13 The present invention relates to a method for delivering a fluid into a 14 vessel of a human body, and to a cannula useful to carry out the method.
More particularly, the present invention relates to the delivery of a fluid, such as blood, 16 into blood vessel, preferably into an aortic arch.
18 Delivery of fluid into body vessels entails the risk that a fluid stream is 19 "jetted" out from a respective cannula and thereby exposes a proximate vessel wall to significant stress. In particular in older patients, this stress cause by the 21 exiting jet stream may dislodge sclerotic deposits which are then flushed into the 22 blood circulation. This may lead i.a, to a clogging of vessels and to embolism.
. CA 02311977 2000-06-19 1 To counter this, U.S_ Pat. Nos. 5,354,288 and 5,843,226 propose to 2 provide a deflector in the outlet zone of the cannula, whereby the deflector may 3 have a drop shape or include a deflector plate on the outlet side. Moreover, U.S.
4 Pat. No. 5,354,288 describes the provision of a diffuser in the outlet zone of the cannula in order to further thwart the formation of a pointedly directed jet stream.
SUMMARY OF THE INVENTION
9 It is thus an object of the present invention to provide an improved method for delivering a fluid into a vessel of the human body, obviating the afore-stated 11 drawbacks.
13 In particular, it is an object of the present invention to provide an improved 14 method for delivering a fluid into a vessel of the human body, by which the pressure applied by the outgoing fluid stream is significantly reduced compared 16 to cornentional methods.
18 These objects, and others which will becorne apparent hereinafter, are 19 attained in accordance with the present invention by a method for delivering a fluid into a vessel, in particular into an aortic arch, which method includes the 21 step of imposing an axial motion as well as a whirling motion upon each fluid 22 particle when the fluid enters the vessel.
1 Conventional methods are incapable to impose such a whirling motion 2 upon all fluid particles because the encountered velocities are too high in the 3 relatively short interactive pathway in order to be able to induce a whirling 4 motion. Moreover, conventional cannulae have parts incorporated therein which lead to a cross sectional constriction immediately before of the entry zone, 6 resulting in an increase of the flow velocity. However, a rise of the flow velocity is, 7 in general, undesired.
9 It is another object of the present invention to provide an improved cannula useful for carrying out the novel and inventive method according to the 11 present invention.
13 This object is attained in accordance with the present invention by 14 providing a tubular body, and a device for imposing a whirling motion upon each fluid particle of a fluid which flows through the lumen of the tubular body into the 16 vessel.
18 According to another feature of the present invention, a swirl-inducing 19 device is accommodated in the tubular body and sv positioned that the cross section of the outlet port of the cannula is not narrowed_ Suitably, the 21 swirl-inducing device should be positioned in an area of the tubular body which is 22 upstream of the narrower entry zone of the tubular body through an opening in 23 the vessel wall so as to prevent a further cross sectional constriction by the 1 swirl-inducing device in this narrower entry zone.
3 Suitably, such a whirling motion of the fluid should be induced before the 4 fluid enters the vessel and should not be generated only through interaction with the vessel.
7 According to another feature of the present invention, a whirling vector a associated to the whirling motion has a component which is oriented in the 9 direction of the remaining motion, i.e. linear motion, of the respective fluid particle. This results in a tendency of the fluid stream to substantially spread out, 11 thereby effectively reducing the stream pressure of the outgoing fluid flow.
13 The whirling motion can be induced in a simple and cost-effective manner 14 especially by a swirl-inducing device, whereby a sufficient interactive zone of the swirl-inducing device should be ensured to attain that all fluid particles are 16 exposed to the whirling motion. This is true in particular when positioning the 17 swirl-inducing device at the end of the cannula. On the other hand, it may be 18 possible to provide an equalizing zone behind the swirl-inducing device in flow 19 direction of the fluid. Fluid particles, already executing a whirling motion, can transmit the whirling motion in the equalizing zone to further fluid particles. Thus, 21 even a shortened interactive zone or a shorter swirl-inducing device can be used 22 while still ensuring that all fluid particles carry out a whirling motion.
The 23 equalizing zone may hereby have characteristics that further impact the flow 1 guidance.
3 It is also possible to provide the swirl-inducing device, as viewed in fluid 4 flow direction, upstream of an angled zone or bend of the cannula, thereby ensuring an improved flow guidance. Even though, various cannulae, in 6 particular aortic cannulae, may differ in the configuration of their angled zone, the 7 remaining zones are effectively standardized and identical. Thus, different 8 cannulae may use a same swirl-inducing device, thereby reducing production 9 costs. Of course, the angled zone may be utilized as equalizing zone as well.
11 According to another feature of the present invention, the swirl-inducing 12 device may be provided upstream of a tapered zone of the cannula, when viewed 13 in flow direction of the fluid_ This, too, results in a better flow guidance and an 14 improved inducement of the whirling motion_ Furthermore, the rotation is accelerated by this tapered configuration so that the whirling motion is 16 significantly higher when the fluid enters the vessel. Of course, such a tapered 17 zone may be combined with an equalizing zone andlor an angled zone of the 1 B tubular body.
BRIEF DESCRIPTION OF THE DRAWING
22 The above and other objects, features and advantages of the present 23 invention will be rnore readily apparent upon reading the following description of . CA 02311977 2000-06-19 1 preferred exemplified embodiments of the invention with reference to the 2 accompanying drawing, in which:
4 FIG. 1 is a schematic illustration of one embodiment of a cannula according to the present invention for delivering a fluid into a vessel; and 7 FIG. 2 is a schematic perspective illustration, on an enlarged scale 8 of another embodiment of a cannula according to the present invention for 9 delivering a fluid into a vessel.
13 Turning now to the drawing, and in particular to F1G. 1, there is shown a 14 schematic illustration of one embodiment of a cannula 2, e.g, an aortic cannula, according to the present invention, for delivering a fluid into a vessel 1, e.g. an 16 aortic arch. The cannula 2 has a generally tubular body which includes a lower 17 portion inserted through an oval opening 3, made through incision in the wall of 18 the aortic arch 1, so that an entry zone 4 of the lower portion of the cannula 2 is 19 positioned inside the aortic arch 1 while a rear portion 5 of the cannula 2 is positioned outside the aortic arch 1. The lower portion, which includes the entry 21 zone 4, has a cross section which is narrower than the remaining portion of the 22 tubular body so that the size of the opening 3 can be kept as small as possible.
23 The cross sectional constriction also results in an increase of the flow velocity in 1 the entry zone 4.
3 Non-rotatably positioned in the rear portion 5 of the cannula 2 is a 4 swirl=inducing device 6 which is suitably secured, e.g. press-fitted or glued, in the lumen of the tubular body and so configured that a whirling motion, i,e.
swirl, is 6 imposed on each fluid particle, moving in axial direction through the lumen of the 7 tubular body of the cannula 2. An equalizing zone 7 is provided between the 8 swirl-inducing device 6 and the narrowed entry zone 4 and represents a 9 transition zone between the wider rear portion 5 and the narrower entry zone 4_ 11 Approximately in the area of the opening 3 through the vessel wall of the 12 aortic arch 1, the tubular body of the cannula 2 has an angled zone or bend 8 to 13 form an arched configuration of the cannula 2 in this area: As clearly shown in 14 FIG. '1, the swirl-inducing device fi is disposed upstream of the bend 8, as viewed in flow direction of the fluid through the cannula 2. Since the cross section 16 upstream of the bend 8 is also narrowed, the swirl-inducing device 6 is suitably 17 disposed in fluid flow direction upstream of the tapered zone of the cannula 2, 19 ~ The swirl-inducing device may be of any suitable configuration that is capable to impose a whirling motion on a fluid stream, e.g., a body having a 21 plurality of guide blades attached to the body in suitable fashion.
23 Fluid, e.g, blood, perfusing through the lumen of the cannula 2, is imparted.
1 a whirling motion by the swirl-inducing device 6, and subsequently flows through 2 the tapered transition zone into the bend 8. These zones constitute also the 3 equalizing zone 7. When entering the aortic arch or vessel 1, each fluid particle 4 has therefore a substantially linear direction of motion as a consequence of the lumen of the tubular body, and a whirling motion as a consequence of the 6 whirling motion generated by the swirl-inducing device 6_ The whirling motion is 7 thereby defined by a whirling vector having a component in parallel relation to the 8 linear motion. This whirling motion results is a rapid spreading out of the exiting 9 stream without jetting so that the emanating fluid stream is gentle on the vessel wall and in particular a dislodging and flushing of sclerotic deposits can be 11 significantly reduced.
13 Turning now to FIG. 2, there is shown a schematic perspective illustration, 14 on an enlarged scale, of another embodiment of a cannula 12 according to the present invention for delivering a fluid into a vessel (not shown here). The 16 cannula 12 has a tubular body which accommodates a swirl-inducing device 16 17 for imposing a whirling motion, indicated by reference numeral 13, upon the fluid 18 flowing in direction of arrow ~ 9. In the nonlimiting example of FIG. 2, the 19 swirl-inducing device 16 has a screw-like or helical configuration, with a thread 16a extending along a central shaft 16b. Downstream of the swirl body 16, 21 the tubular body has in succession an equalizing zone 17, a tapered zone 11 and 22 an angled zone or bend 18. The bend 18 is suitably part of a plug 20, sealingly 23 received in the vessel-near end of the tubular body, and has an outlet port 1 through which the fluid stream 15 emanates from the cannula 12 and enters into 2 the vessel with a whirling motion 13 of the fluid, generated by the swirl-inducing 3 device 16. As a consequence of the whirling motion, the fluid stream has a 4 tendency to spread out so that the stream pressure is effectively reduced when the fluid exits the outlet port 14.
? While the invention has been illustrated and described as embodied in a 8 method for delivering a fluid into a vessel of a human body, and improved 9 cannuia useful for carrying out the method, it is not intended to be limited to the details shown since various modifications and structural changes may be made 11 without departing in any way from the spirit of the present invention.
13 What is claimed as new and desired to be protected by Letters Patent is 14 set forth in the appended claims:
Claims (11)
1. A method for delivering a fluid into a vessel, in particular into an aortic arch, comprising the step of imposing on each fluid particle an axial motion and a whirling motion when entering the vessel.
2. The method of claim 1 wherein a whirling vector associated to the whirling motion has a component in parallel relation to the remaining motion.
3. The method of claim 2 wherein the component is provided in parallel relation to a linear motion of the fluid particles of the fluid.
4. A cannula, in particular an aortic cannula, comprising a tubular body; and a device for imposing a whirling motion on each fluid particle of a fluid entering through the tubular body into a vessel.
5. The cannula of claim 4 wherein the device is a swirl-inducing device accommodated in the tubular body.
6. The cannula of claim 5 wherein the tubular body has an outlet port, said swirl-inducing device positioned to prevent a cross sectional constriction of the outlet port of the tubular body.
7. The cannula of claim 5 wherein the tubular body has an equalizing zone downstream of the swirl-inducing device in flow direction of the fluid.
8. The cannula of claim 5 wherein the tubular body has an angled zone, said swirl-inducing device located upstream of the angled zone in flow direction of the fluid.
9. The cannula of claim 5 wherein the tubular body has a tapered zone, said swirl-inducing device located upstream of the tapered zone in flow direction of the fluid.
10. The method of claim 4 wherein a whirling vector associated to the whirling motion has a component in parallel relation to the remaining motion.
11. The method of claim 10 wherein the component is provided in parallel relation to a linear motion of fluid particles of the fluid.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19928018 | 1999-06-18 | ||
| DE19928018.5 | 1999-06-18 | ||
| DE19933171.5 | 1999-07-15 | ||
| DE19933171A DE19933171A1 (en) | 1999-06-18 | 1999-07-15 | Blood perfusion into aortic bend twists each incoming particle in linear movement upstream of an angled sector tapering assisted by twist vector component parallel to linear flow. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2311977A1 true CA2311977A1 (en) | 2000-12-18 |
Family
ID=26053844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2311977 Abandoned CA2311977A1 (en) | 1999-06-18 | 2000-06-19 | Method for delivering a fluid into a vessel of a human body, and improved cannula useful for carrying out the method |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1066851A1 (en) |
| JP (1) | JP2001017552A (en) |
| CA (1) | CA2311977A1 (en) |
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| US7473245B2 (en) | 2003-01-30 | 2009-01-06 | Sorin Group Deutschland Gmbh | Aortic cannula |
| US7842123B2 (en) | 2006-10-31 | 2010-11-30 | Milo Ehud | Extraction of gas from infused liquid |
| US8900060B2 (en) | 2009-04-29 | 2014-12-02 | Ecp Entwicklungsgesellschaft Mbh | Shaft arrangement having a shaft which extends within a fluid-filled casing |
| US8926492B2 (en) | 2011-10-11 | 2015-01-06 | Ecp Entwicklungsgesellschaft Mbh | Housing for a functional element |
| US8932141B2 (en) | 2009-10-23 | 2015-01-13 | Ecp Entwicklungsgesellschaft Mbh | Flexible shaft arrangement |
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| US8979493B2 (en) | 2009-03-18 | 2015-03-17 | ECP Entwicklungsgesellscaft mbH | Fluid pump |
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| US9089670B2 (en) | 2009-02-04 | 2015-07-28 | Ecp Entwicklungsgesellschaft Mbh | Catheter device having a catheter and an actuation device |
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| US9314558B2 (en) | 2009-12-23 | 2016-04-19 | Ecp Entwicklungsgesellschaft Mbh | Conveying blades for a compressible rotor |
| US9328741B2 (en) | 2010-05-17 | 2016-05-03 | Ecp Entwicklungsgesellschaft Mbh | Pump arrangement |
| US9339596B2 (en) | 2009-12-23 | 2016-05-17 | Ecp Entwicklungsgesellschaft Mbh | Radially compressible and expandable rotor for a fluid pump |
| US9358330B2 (en) | 2009-12-23 | 2016-06-07 | Ecp Entwicklungsgesellschaft Mbh | Pump device having a detection device |
| US9416791B2 (en) | 2010-01-25 | 2016-08-16 | Ecp Entwicklungsgesellschaft Mbh | Fluid pump having a radially compressible rotor |
| US9416783B2 (en) | 2009-09-22 | 2016-08-16 | Ecp Entwicklungsgellschaft Mbh | Compressible rotor for a fluid pump |
| US9603983B2 (en) | 2009-10-23 | 2017-03-28 | Ecp Entwicklungsgesellschaft Mbh | Catheter pump arrangement and flexible shaft arrangement having a core |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2756862A1 (en) * | 2013-01-21 | 2014-07-23 | Rheinisch-Westfälisch-Technische Hochschule Aachen | Blood cannula |
| EP2996796B1 (en) | 2013-05-17 | 2020-12-09 | novalung GmbH | Oxygenator and its use |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4474206A (en) * | 1982-04-05 | 1984-10-02 | Imed Corporation | Apparatus for, and method of, controlling the flow of fluid |
| US4634434A (en) * | 1985-02-19 | 1987-01-06 | Biomedical Dynamics Corporation | Apparatus for regulating the flow of fluid in medical apparatus |
| US5354288A (en) | 1993-02-24 | 1994-10-11 | Minnesota Mining And Manufacturing Company | Low velocity aortic cannula |
| US5643226A (en) | 1993-02-24 | 1997-07-01 | Minnesota Mining And Manufacturing | Low velocity aortic cannula |
| GB9425493D0 (en) * | 1994-12-16 | 1995-02-15 | Imperial College | Modified cannula |
-
2000
- 2000-06-19 CA CA 2311977 patent/CA2311977A1/en not_active Abandoned
- 2000-06-19 EP EP00112879A patent/EP1066851A1/en not_active Withdrawn
- 2000-06-19 JP JP2000183496A patent/JP2001017552A/en not_active Withdrawn
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2001017552A (en) | 2001-01-23 |
| EP1066851A1 (en) | 2001-01-10 |
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