AU2002335587A1 - Disposable for application in a device for heating a physiological fluid - Google Patents
Disposable for application in a device for heating a physiological fluidInfo
- Publication number
- AU2002335587A1 AU2002335587A1 AU2002335587A AU2002335587A AU2002335587A1 AU 2002335587 A1 AU2002335587 A1 AU 2002335587A1 AU 2002335587 A AU2002335587 A AU 2002335587A AU 2002335587 A AU2002335587 A AU 2002335587A AU 2002335587 A1 AU2002335587 A1 AU 2002335587A1
- Authority
- AU
- Australia
- Prior art keywords
- baffle
- bend
- conduit
- disposable
- disposable according
- 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.)
- Granted
Links
Description
Disposable for application in a device for heating a physiological fluid
The invention relates to a disposable that is suitable for application in a device for heating a physiological fluid, in particular blood, and is provided with a conduit for conducting fluid, which conduit comprises con- duit sections that are arranged next to each other and bends that connect the conduit sections.
A device for heating a physiological fluid using such a disposable is described in applicants' earlier patent application NL-A-1015999, which is not pre-published. In such a device for heating a physiological fluid the conduit is accommodated in an element that can be exchanged after use as disposable. The conduit is further embodied such that at least one side is permeable to infrared radiation to facilitate heating by means of, for example, an infrared lamp or another source of infrared radiation.
When heating the physiological fluid in the conduit in this manner, so-called hot spots' should be avoided. In the case of heating blood plasma, such hot spots may cause the disintegration of the heated blood cells. The conduit through which the physiological fluid to be heated is conducted, is relatively wide and shallow, so that heating will produce only a moderate temperature gradient in the fluid. It is the object of the invention to further improve the disposable referred to in the preamble so as to avoid the occurrence of temperature variations, in particular (but not exclusively) hot spots, and to effectively mix the physiological fluid in order to allow said fluid in the conduit to acquire a substantially uniform temperature.
This is realised in various aspects of the invention by using a disposable that complies with one or more of the appended claims.
In a first aspect of the invention the disposable is characterized in that in at least one of the bends a first turbulence-inducing obstruction is placed, preferably a baffle having a height of at least approximately 20% of the height of the conduit at the position of that baffle. Such a baffle causes a turbulence in the fluid stream such as to prevent the occurrence of hot spots . The invention is certainly not limited to a baffle of this kind, rather it is aimed at such obstructions in general that are suitable for producing sufficient turbulence. However, in order to be able to properly understand the invention, the same will be further explained with reference to the proposed use of a baffle or baffles. An important advantage of the embodiment with baffles is, moreover, that the disposable can be manufactured simply and at limited costs by injection moulding.
The first baffle (the first obstruction) is optimally effective if the same has a top edge which, viewed from the outer side of the at least one bend, slopes down- ward.
It is also shown to be advantageous that the first baffle is placed in the at least one bend at an angle in relation to the local direction of flow.
The effectiveness of the measures proposed in ac- cordance with the invention is further assisted by embodying the bends succeeding the conduit sections such that their width is substantially the same as their height, and by placing the first baffle in the at least one bend near the connection with the conduit portion preceding this bend and in its extended direction. More preferably said bends are embodied with a circular cross section. This sustains the turbulence in the bends as effectively as possible.
It is further desirable to provide the disposable with a second baffle in the at least one bend.
Preferably the second baffle also has a top edge which, viewed from the outer side of the at least one bend, slopes downward, and is this second baffle also placed at an angle in the at least one bend.
Viewed in the direction of flow of the bend, the second baffle is placed after the first baffle, in a manner so as to be positioned in the curve and exactly before the part of the bend that is succeeded in its extended di- rection by a further conduit section.
The invention will now be further elucidated with reference to the drawing or to a non-limiting exemplary embodiment .
The drawing shows in - Fig. 1 a schematic illustration of the administration of blood to a patient, and
- Figs. 2 and 3 in a top and side view respectively, a cross section of the disposable that can be applied in the heating device used in Fig. 1. Identical reference numbers in the figures indicate identical parts.
Referring first to Fig. 1, a schematic illustration of blood or another physiological fluid being administered to a patient is shown. The fluid to be introduced into the body of a patient 1 is contained in a storage bag 2. Under the influence of, for example gravity, said fluid from the storage bag 2 passes a filter 3, from where it is conducted to a heating device 4 comprising a disposable 5 in which the actual heating of the fluid takes place be- fore it is administered to the patient 1. As can be clearly seen in Fig. 2, this disposable 5 comprises a conduit 6 arranged in a flat plane. The conduit comprises conduit sections 6.1-6.10 arranged next to each other and in counterflow, and bends 6.12, 6.23, 6.34, etc., connect- ing the various conduit sections.
Basically, all bends are embodied the same but this is, of course, no prerequisite for the invention and it is also possible to embody just one or some of the bends in the manner explained hereafter in more detail, referring just to bend 6.12. As can be seen in Fig. 2, bend 6.12 comprises a first baffle 7 whose height, as Fig. 3 clearly shows, is approximately half that of the conduit's height at the position of the baffle 7. However, the inventors have found that a height of at least ap-
proximately 20% of the height of the conduit is also very effective.
Fig. 2 further shows that the bend 6.12 comprises a second baffle 8. Viewed from the outside of the bend 6.12, both the first baffle 7 and the second baffle 8 preferably have top edges that slope downward. This is clearly shown in Fig. 3. Fig. 2 shows that the first baffle 7 and the second baffle 8 are placed at an angle in relation to the bulk of the local direction of flow in the bend 6.12.
Fig. 3, in combination with Fig. 2 further shows clearly that the conduit sections 6.1 and 6.2 are wide and shallow, while the bend 6.12 is embodied with a width that is substantially the same as the height, with the first baffle 7 being placed in this bend 6.12 near its connection with the conduit portion 6.1 and in its extended direction immediately preceding the bend. It is further preferred for the bends to be embodied with a circular cross section. However, is it difficult to manufacture this; in contrast, the embodiment in which the width and height of the bends are the same is easy to manufacture, while the turbulence in the bends is sustained very well.
The second baffle 8, which viewed in the direction of flow of the disposable 5 succeeds the first baffle 7, is placed in the curve of the bend 6.12, just before the portion that in its extended direction forms the succeeding conduit portion 6.2.
As will be clear from the above explanation, various modifications of the disposable elucidated with reference to the exemplary embodiment shown in the drawing are possible. This explanation merely serves to clarify the appended claims, without limiting them to the specific design of the exemplary embodiment.
Claims (10)
1. A disposable that is suitable for application in a device for heating a physiological fluid, in particular blood, and is provided with a conduit for conducting fluid, which conduit comprises conduit sections that are arranged next to each other and bends that connect the conduit sections, characterised in that in at least one of the bends a first turbulence-inducing obstruction is placed.
2. A disposable according to claim 1, charac- terised in that as first obstruction a baffle is provided having a height of at least approximately 20% of the height of the conduit at the position of this first baffle.
3. A disposable according to claim 1 or 2, characterised in that the first baffle has a top edge which, viewed from the outer side of the at least one bend, slopes downward.
4. A disposable according to one of the claims 1-3, characterised in that the first baffle is placed in the at least one bend at an angle in relation to the local direction of flow.
5. A disposable according to one of the claims 1-4, characterised in that the conduit sections are wide and shallow and the bends are embodied with a width and height that in cross section are substantially the same, and in that the first baffle is placed in the at least one bend near the connection with the conduit portion and in its extended direction, preceding this bend.
6. A disposable according to one of the claims 1-5, characterised in that a second baffle is provided in the at least one bend.
7. A disposable according to claim 6, characterised in that the second baffle has a top edge which, viewed from the outer side of the at least one bend, slopes downward.
8. A disposable according to claim 6 or 7, characterised in that the second baffle is placed at an angle in relation to the local direction of flow in the at least one bend.
9. A disposable according to one of the claims
6-8, characterised in that viewed in the direction of flow, the second baffle is placed after the first baffle.
10. A disposable according to claim 9, characterised in that the second baffle is placed in the curve of the bend, exactly before the part of the bend that is succeeded in its extended direction by a further conduit section.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL1019347A NL1019347C2 (en) | 2001-11-12 | 2001-11-12 | Consumable for use in a device for heating a physiological fluid. |
NL1019347 | 2001-11-12 | ||
PCT/NL2002/000706 WO2003041773A1 (en) | 2001-11-12 | 2002-11-06 | Disposable for application in a device for heating a physiological fluid |
Publications (2)
Publication Number | Publication Date |
---|---|
AU2002335587A1 true AU2002335587A1 (en) | 2003-07-24 |
AU2002335587B2 AU2002335587B2 (en) | 2007-10-25 |
Family
ID=19774294
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU2002335587A Expired AU2002335587B2 (en) | 2001-11-12 | 2002-11-06 | Disposable for application in a device for heating a physiological fluid |
Country Status (13)
Country | Link |
---|---|
US (1) | US8142718B2 (en) |
EP (1) | EP1446179B1 (en) |
JP (1) | JP4228053B2 (en) |
KR (1) | KR100906354B1 (en) |
CN (1) | CN1305536C (en) |
AT (1) | ATE384544T1 (en) |
AU (1) | AU2002335587B2 (en) |
DE (1) | DE60224821T2 (en) |
DK (1) | DK1446179T3 (en) |
ES (1) | ES2298396T3 (en) |
NL (1) | NL1019347C2 (en) |
PT (1) | PT1446179E (en) |
WO (1) | WO2003041773A1 (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7236694B1 (en) * | 2006-01-27 | 2007-06-26 | Jacques Chammas | Blood and biological fluid warmer |
US8790303B2 (en) | 2009-03-09 | 2014-07-29 | Thermedx, Llc | Fluid management system heater assembly and cartridge |
US9474848B2 (en) | 2009-03-09 | 2016-10-25 | Thermedx, Llc | Fluid management system |
JP5321257B2 (en) * | 2009-06-09 | 2013-10-23 | 株式会社ジェイ・エム・エス | Medical heat exchanger, method for manufacturing the same, and oxygenator |
US7988666B2 (en) | 2009-08-04 | 2011-08-02 | Honeywell International, Inc. | Broadband infrared heating of medical fluids |
US9770541B2 (en) | 2014-05-15 | 2017-09-26 | Thermedx, Llc | Fluid management system with pass-through fluid volume measurement |
EP3791900B1 (en) * | 2017-05-11 | 2022-08-03 | Gambro Lundia AB | Container for fluids and apparatus for warming medical fluids |
WO2020264084A1 (en) | 2019-06-27 | 2020-12-30 | Boston Scientific Scimed, Inc. | Detection of an endoscope to a fluid management system |
US20210138146A1 (en) | 2019-11-08 | 2021-05-13 | Thermedx Llc | Fluid Management Systems and Methods |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DD206626A3 (en) * | 1981-12-15 | 1984-02-01 | Christoph Drechsler | BLOOD TREATMENT TRAIN IN A BLACK-WATER BAG |
IL79125A (en) * | 1986-06-16 | 1990-02-09 | Solmecs Corp Nv | Method and apparatus for modification of the rate of heat or mass transfer in a stream of liquid metal |
JPH0667408B2 (en) * | 1987-07-13 | 1994-08-31 | テルモ株式会社 | Multi-tube heat exchanger |
US5254259A (en) * | 1989-08-17 | 1993-10-19 | Bellhouse Brian John | Method and apparatus for effecting the transfer of heat or mass through a membrane involving the use of vortices |
US5381510A (en) * | 1991-03-15 | 1995-01-10 | In-Touch Products Co. | In-line fluid heating apparatus with gradation of heat energy from inlet to outlet |
FR2740687B1 (en) * | 1995-11-02 | 1997-12-05 | Boudu Sante Sarl | HEAT EXCHANGER FOR MEDICAL USE |
US6175688B1 (en) * | 1998-07-10 | 2001-01-16 | Belmont Instrument Corporation | Wearable intravenous fluid heater |
WO2000053246A1 (en) * | 1999-03-09 | 2000-09-14 | Augustine Medical, Inc. | Iv fluid warming system with detection of presence and alignment of cassette |
CN2424778Y (en) * | 2000-04-29 | 2001-03-28 | 宗波 | Heating means for transfusion |
NL1015999C2 (en) | 2000-08-23 | 2002-02-26 | A J Van Liebergen Holding B V | Device for heating blood or other physiological fluids. |
US6773670B2 (en) * | 2001-02-09 | 2004-08-10 | Cardiovention, Inc. C/O The Brenner Group, Inc. | Blood filter having a sensor for active gas removal and methods of use |
-
2001
- 2001-11-12 NL NL1019347A patent/NL1019347C2/en not_active IP Right Cessation
-
2002
- 2002-11-06 ES ES02770329T patent/ES2298396T3/en not_active Expired - Lifetime
- 2002-11-06 AT AT02770329T patent/ATE384544T1/en active
- 2002-11-06 EP EP02770329A patent/EP1446179B1/en not_active Expired - Lifetime
- 2002-11-06 PT PT02770329T patent/PT1446179E/en unknown
- 2002-11-06 KR KR1020047007125A patent/KR100906354B1/en active IP Right Grant
- 2002-11-06 DE DE60224821T patent/DE60224821T2/en not_active Expired - Lifetime
- 2002-11-06 WO PCT/NL2002/000706 patent/WO2003041773A1/en active IP Right Grant
- 2002-11-06 JP JP2003543659A patent/JP4228053B2/en not_active Expired - Lifetime
- 2002-11-06 AU AU2002335587A patent/AU2002335587B2/en not_active Expired
- 2002-11-06 CN CNB028224515A patent/CN1305536C/en not_active Expired - Lifetime
- 2002-11-06 DK DK02770329T patent/DK1446179T3/en active
-
2004
- 2004-04-30 US US10/837,390 patent/US8142718B2/en active Active
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