US3908652A - Medical infusion apparatus - Google Patents

Medical infusion apparatus Download PDF

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US3908652A
US3908652A US395922A US39592273A US3908652A US 3908652 A US3908652 A US 3908652A US 395922 A US395922 A US 395922A US 39592273 A US39592273 A US 39592273A US 3908652 A US3908652 A US 3908652A
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infusion
valve
casing sections
needle
lever
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Hermann Weissinger
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/168Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
    • A61M5/172Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body electrical or electronic
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M39/00Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/22Valves or arrangement of valves
    • A61M39/26Valves closing automatically on disconnecting the line and opening on reconnection thereof
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/142Pressure infusion, e.g. using pumps
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/44Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests having means for cooling or heating the devices or media
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M2205/00General characteristics of the apparatus
    • A61M2205/36General characteristics of the apparatus related to heating or cooling
    • A61M2205/3653General characteristics of the apparatus related to heating or cooling by Joule effect, i.e. electric resistance
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S128/00Surgery
    • Y10S128/13Infusion monitoring

Definitions

  • a medical infusion apparatus has an infusion flask an 128/214 2, 7 infusion tube fastened to the flask and lying in a two DIG 12 1 6: part casing provided with an electrical control system and a drip valve or infusion pump, the flask being ex- [56] References Cited changeably fastened to the casing and the valve or NI D TAT P TENTS pump being exchangeably disposed at the bottom of U TE S ES A the casing. Heating means is provided to heat the liq- 1 534913 4 1925 Buck et 111. v.
  • the invention relates to infusion apparatus, particularly electrically monitored, having an infusion flask, an infusion tube fastened thereto and provided with a drip chamber, a casing for receiving the electrical control system, and a drip valve or an infusion pump.
  • Infusion devices of this kind are already known see for example applicable trade literature. In these devices gravity flow of an infusion solution is automatically controlled at a preselected rate of flow.
  • the problem underlying the invention therefore consists in so improving the apparatus of the kind first mentioned above that it can be used as universal apparatus.
  • the apparatus should permit in a simple manner the insertion of a complete commercially available infusion set, in such a way that it can work both with a drip valve and with an infusion pump without it being necessary, for example, to clip the drop sensor to the drip chamber.
  • apparatus is capable of universal use because the drip valve can be replaced by a pump, so that the same apparatus can be adapted to various requirements.
  • the casing is composed of two parts and for the infusion tube to be disposed between the two parts.
  • maximum integration of the casing magnet In this way a relatively small control magnet is sufficient to supply the necessary force in all cases so that the universal nature of the apparatus is further increased, since the most diverse tubes can be used without disadvantage.
  • the second clamp jaw it may also be very helpful for the second clamp jaw to be stationary but adjustable in position by means of an eccentric adjusting pin.
  • the invention provides an infusion apparatus having an infusion flask, an infusion tube fastened thereon and provided with a drip chamber, a casing to receive an electrical control system, and a drip valve or an infusion pump, said infusion flask being exchangeably fastened to the casing and that the drip valve or the infusion pump being exchangeably disposed at the bottom of the casing.
  • FIG. 1 is a diagrammatical front view of an apparatus in accordance with the invention
  • FIG. 2 a side view of the apparatus shown in FIG. 1,
  • FIG. 3 a front view of a replacement part for use with the apparatus shown in FIGS. 1 and 2,
  • FIG. 4 a side view of the replacement part shown in FIG. 3,
  • FIG. 5 a front view of another replacement part for use on the apparatus shown in FIGS. 1 and 2, and
  • FIG. 6 a side view of the replacement part shown in FIG. 5.
  • FIG. 7 is a longitudinal section, on a much larger scale, through the end of the infusion tube.
  • FIG. 8 shows the same as FIG. 7, but before fastening of the infusion tube.
  • FIG. 1 shows the completely assembled apparatus, comprising an infusion set consisting of an infusion flask l, a drip chamber 9 and an infusion tube 5, this set being incorporated in an apparatus comprising essentially two casing parts 2 and 3 together with a mounting flange 15.
  • the mounting flange 15 can, for example, be opened by means of a hinge in order to insert the infusion set.
  • the drip chamber 9 thus always lies in the region of a transmitter 26 and a receiver 27 of known construction, without it being necessary for these components to be clipped to the drip chamber.
  • the drip valve 4 which is operated by an electromagnet 12 the electric lead of which is designated 16.
  • This drip valve unit can be replaced by an infusion pump, as will be explained below more fully.
  • a number of switches namely a starting switch 28, a mains switch 29, and a drip pre-selector switch 32, are also provided on the casing. Furthermore, a mains pilot lamp 30 and an alarm lamp 31 are also indicated here.
  • Two screws 33 and 34 allow the drip valve unit to be replaced by a motor-driven infusion pump, as will be explained later on.
  • FIG. 3 shows the drip valve unit 4 in greater detail.
  • This Figure shows two mounting lugs 22 and 23 with fastening holes 24 and 25, by means of which the unit can be replaced as a whole with the aid of the screw 33 and 34 shown in FIG. I.
  • the infusion tube 5 is clamped between clamp jaws 7 and 8, which are rotatable about the screw 10.
  • the clampjaw 7 is generally made stationary, but can be adjusted by the action of an eccentric adjusting pin 13 on a long lever arm 35.
  • the other adjusting jaw 8 on the other hand, is adapted to be continuously moved by means of a magnet 12, which acts on the switch pin 36 on the long lever arm 11. The return movement is effected by means of the spring 14.
  • the long lever arm 11 has a length which is a multiple of that of the short lever arm between the clamp jaw 8 and the screw 10
  • the magnet 12 can be of relatively small dimensions, while it is nevertheless possible for the most diverse tubes 5 to be used with the infusion set.
  • FIG. 4 shows a side view of the fastening hole 24 behind which is provided a recess 37 suitably adapted to the casing 2, 3, so that the element can be fastened to the casing only by the two screws 33 and 34.
  • FIGS. 5 and 6 Exactly the same purpose is served by two fastening holes 18 and 19 in FIGS. 5 and 6, which are provided in a motor-driven infusion pump 55 shown there. These continuous action infusion pumps are known per se and need not be described in detail.
  • the arrows 38 and 39 above and below the infusion tube 5 indicate the direction of flow.
  • the motor 17a with its electric leads 17 is provided as drive means and is coupled by means of a coupling pin 54 through a worm drive, as can be seen in FIG. 6.
  • Mounting lugs 20 and 21 correspond to the mounting lugs 22 and 23 shown in FIG. 3.
  • the unit consisting of the drive motor 170 and the infusion pump can also be easily and simply mounted on the casing 2, 3.
  • another important feature of the invention is that provision may also be made for electronic elements or components in the casing 2, 3, to be replaced by other elements or components for different functions, so that the apparatus is suitable for the most diverse purposes, in accordance with a module principle.
  • FIG. 7 shows the end of the infusion tube 5, in which in a further embodiment of the invention a ball valve having the valve casing 43 is disposed, the valve casing containing a valve ball 47 loaded by a spring 38.
  • the ball 47 has been lifted off its valve seat 39 by an extension 40 of the injection needle 4] so that the flow in the direction of the needle 41 is permitted.
  • FIG. 8 shows the situation when the needle holder 44 has been pulled off the valve casing 43 in the downward direction, so that the valve ball 47 loaded by the spring 38 is pressed onto its seat 39 and the infusion liquid can no longer flow out.
  • FIG. 8 shows clearly that the injection needle 41 is provided with the previously mentioned extension 40.
  • the latter may also be formed by the use of a slightly longer needle, the inlet 45a of which however lies, at least in part, slightly lower than the end 45.
  • the dimensions are here shown greatly exaggerated, and inpractice the distance may amount to only a few millimetres.
  • an intermediate part may be disposed between the needle 41 and the mounting 46 of the valve casing 43, the latter being provided with an extension of this kind, namely the extension 40, in order to enable a conventional needle 41 to be used, in which case this needle need not have the extra length. This will be immediately understandable to the specialist, so that this arrangement need not be illustrated.
  • attachment or extension 40 ensures that the valve is closed immediately when the needle is pulled off.
  • the apparatus provides the advantage that accidental flow is reliably prevented and in addition the apparatus can be arranged in this case to give an alarm signal.
  • the ball is pressed back onto its valve seat by the spring, and the tube is immediately closed, so that no further infusion liquid can flow out.
  • the tube is thus immediately filled with liquid and an alarm signal may be operated by an electrical device, whereby staff can be summoned.
  • heat radiation source 42 as shown in FIGS. 1 and 2 there is the advantage that the infusion liquid does not need to be heated before commencement of the infusion but on the contrary the infusion can commence immediately.
  • the blood is heated on its path from the flask l to the tube 5.
  • the heat radiation source may also act over other regions of the flask 1 and/or of the tube 5, and also of the drip chamber 9. It is thus possible for the radiator to be disposed in other positions than those shown in FIGS. 1 and 2. It is also within the scope of the invention for the entire infusion flask to be heated.
  • drop sensor means mounted on the casing sections adjacent the top end thereof and operatively spanning the space between the casing sections
  • a drip chamber communicating with the infusion flask and positioned freely in the space between the casing sections for sensing by the drop sensor means
  • infusion outfeed control means mounted on the casing sections adjacent the bottom end thereof and operatively spanning the space between the casing sections
  • an infusion tube communicating with the drip chamber and extending downward therefrom freely through the space between the casing sections and operatively connected to the outfeed control means.
  • infusion apparatus of claim 1 wherein the infusion tube is provided at its outfeed end with a valve body housing a spring-loaded ball valve, an injection needle adapted for removable attachment to the valve body, and valve operator means operatively associated with the needle independently of the infeed end of the needle for engaging and unseating the ball valve when the needle is attached to the valve body, for the unobstructed flow of infusion liquid into the infeed end of the needle.
  • valve operator means comprises an arcuate segment extension of the wall of the injection needle.
  • the infusion outfeed control means comprises a drip valve including two clamp jaws of which at least one is connected to one end of an elongated lever provided with a pivot adjacent said end, and a control electro magnet engages the lever adjacent the opposite end thereof for pivoting the lever.
  • the infusion apparatus of claim 4 including spring means engaging the lever for returning the associated clamp jaw to unclamping position.

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  • Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Vascular Medicine (AREA)
  • Pulmonology (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

A medical infusion apparatus has an infusion flask an infusion tube fastened to the flask and lying in a two part casing provided with an electrical control system and a drip valve or infusion pump, the flask being exchangeably fastened to the casing and the valve or pump being exchangeably disposed at the bottom of the casing. Heating means is provided to heat the liquid being infused.

Description

United States Patent 1191 Weissinger 1 1 Sept. 30, 1975 [54] MEDICAL INFUSION APPARATUS 10/1963 Schoenfeld 128/214 E 4/1966 Seibert 128/214 A X [76] Inventor: Hermann Weissmger, Fuggerstr. 13 7/1968 Phelps at 128/214 E X 7000 Stuttgart 80, Germany 2/1969 Gordon et 111.. 128/214 E [22] Filed: Sept 10,1973 9 1974 Gregg 128/214 E [2]] Appl' 395922 Primary E.\'uminerDaltOn L. Truluck Attorney, Agent, or Firn1Oliver D Olson [52] US. Cl... 128/214 E; 128/214 A; 128/D1G. 13;
222/173; 222/185 S C I Cl. A61M 05 14 gz of Search 178/714 R A 714/13 A medical infusion apparatus has an infusion flask an 128/214 2, 7 infusion tube fastened to the flask and lying in a two DIG 12 1 6: part casing provided with an electrical control system and a drip valve or infusion pump, the flask being ex- [56] References Cited changeably fastened to the casing and the valve or NI D TAT P TENTS pump being exchangeably disposed at the bottom of U TE S ES A the casing. Heating means is provided to heat the liq- 1 534913 4 1925 Buck et 111. v. 128/214 R ux uid being inf/58 2254,833 2/1941 Askenaz 1. 128/213 2999499 9/1961 Willet 128/214 R 6 Claims, 8 Drawing Figures U.S. Patent Sept. 30,1975 Sheet2 of4 3,908,652
U.S. Patent Sept. 30,1975 Sheet 3 of4 3,908,652
Sept. 30,1975 Sheet 4 of 4 3,908,652
TQUD\\\\\\ L MEDICAL INFUSION APPARATUS BACKGROUND OF THE INVENTION The invention relates to infusion apparatus, particularly electrically monitored, having an infusion flask, an infusion tube fastened thereto and provided with a drip chamber, a casing for receiving the electrical control system, and a drip valve or an infusion pump.
Infusion devices of this kind are already known see for example applicable trade literature. In these devices gravity flow of an infusion solution is automatically controlled at a preselected rate of flow.
Through automatic self-control the known apparatus takes over the function of tube valves and clips. Infusion tubes of any desired thickness can be used, and the rate of flow is adjustable and is automatically maintained constant.
These devices however have the great disadvantage that the infusion flask is separate from an electronic control device, so that a drop sensor must be suspended on the infusion flask and kept separate from the device. Furthermore, various separate devices are required, depending on whether an infusion pump or a magnetic clip release device for flexible tubes is to be used.
Finally, the disadvantage also exists that when ordinary commercially available infusion tubes and complete infusion sets are used the flexibility of some tubes is so slight that a very large magnet is required for the known drip valves. Generally such commercially available tubes can not be used at all.
SUMMARY OF THE INVENTION The problem underlying the invention therefore consists in so improving the apparatus of the kind first mentioned above that it can be used as universal apparatus. This means that the apparatus should permit in a simple manner the insertion of a complete commercially available infusion set, in such a way that it can work both with a drip valve and with an infusion pump without it being necessary, for example, to clip the drop sensor to the drip chamber.
According to the invention this problem is solved by exchangeably fastening the infusion flask on the top of the casing and exchangeably disposing the drip valve or infusion pump at the bottom of the casing.
In this way the separate clipping of the drop sensor to the drip chamber is not necessary, since the invention provides for the apparatus and the infusion flask to form a unit, so that after the flask has been disposed on the apparatus and the tube clamped in position no further installation work is necessary. Furthermore, the
apparatus is capable of universal use because the drip valve can be replaced by a pump, so that the same apparatus can be adapted to various requirements.
As a further development of the invention provision is made for the casing to be composed of two parts and for the infusion tube to be disposed between the two parts. In this way maximum integration of the casing magnet. In this way a relatively small control magnet is sufficient to supply the necessary force in all cases so that the universal nature of the apparatus is further increased, since the most diverse tubes can be used without disadvantage. For this purpose it may also be very helpful for the second clamp jaw to be stationary but adjustable in position by means of an eccentric adjusting pin.
By means of this adjusting pin, adjustment to the most diverse thicknesses of tube can be achieved easily and simply.
The invention provides an infusion apparatus having an infusion flask, an infusion tube fastened thereon and provided with a drip chamber, a casing to receive an electrical control system, and a drip valve or an infusion pump, said infusion flask being exchangeably fastened to the casing and that the drip valve or the infusion pump being exchangeably disposed at the bottom of the casing. v
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagrammatical front view of an apparatus in accordance with the invention,
FIG. 2 a side view of the apparatus shown in FIG. 1,
FIG. 3 a front view of a replacement part for use with the apparatus shown in FIGS. 1 and 2,
FIG. 4 a side view of the replacement part shown in FIG. 3,
FIG. 5 a front view of another replacement part for use on the apparatus shown in FIGS. 1 and 2, and
FIG. 6 a side view of the replacement part shown in FIG. 5.
FIG. 7 is a longitudinal section, on a much larger scale, through the end of the infusion tube, and
FIG. 8 shows the same as FIG. 7, but before fastening of the infusion tube.
DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the completely assembled apparatus, comprising an infusion set consisting of an infusion flask l, a drip chamber 9 and an infusion tube 5, this set being incorporated in an apparatus comprising essentially two casing parts 2 and 3 together with a mounting flange 15. The mounting flange 15 can, for example, be opened by means of a hinge in order to insert the infusion set. The drip chamber 9 thus always lies in the region of a transmitter 26 and a receiver 27 of known construction, without it being necessary for these components to be clipped to the drip chamber.
As indicated in FIG. 1, no contact at all is made between these parts. In the lower region of the casing is indicated the drip valve 4, which is operated by an electromagnet 12 the electric lead of which is designated 16. This drip valve unit can be replaced by an infusion pump, as will be explained below more fully.
A number of switches, namely a starting switch 28, a mains switch 29, and a drip pre-selector switch 32, are also provided on the casing. Furthermore, a mains pilot lamp 30 and an alarm lamp 31 are also indicated here.
Two screws 33 and 34 allow the drip valve unit to be replaced by a motor-driven infusion pump, as will be explained later on.
FIG. 3 shows the drip valve unit 4 in greater detail. This Figure shows two mounting lugs 22 and 23 with fastening holes 24 and 25, by means of which the unit can be replaced as a whole with the aid of the screw 33 and 34 shown in FIG. I.
The infusion tube 5 is clamped between clamp jaws 7 and 8, which are rotatable about the screw 10.
The clampjaw 7 is generally made stationary, but can be adjusted by the action of an eccentric adjusting pin 13 on a long lever arm 35.
The other adjusting jaw 8, on the other hand, is adapted to be continuously moved by means of a magnet 12, which acts on the switch pin 36 on the long lever arm 11. The return movement is effected by means of the spring 14.
Owing to the fact that, as can clearly be seen in the drawing, the long lever arm 11 has a length which is a multiple of that of the short lever arm between the clamp jaw 8 and the screw 10, the magnet 12 can be of relatively small dimensions, while it is nevertheless possible for the most diverse tubes 5 to be used with the infusion set.
FIG. 4 shows a side view of the fastening hole 24 behind which is provided a recess 37 suitably adapted to the casing 2, 3, so that the element can be fastened to the casing only by the two screws 33 and 34.
Exactly the same purpose is served by two fastening holes 18 and 19 in FIGS. 5 and 6, which are provided in a motor-driven infusion pump 55 shown there. These continuous action infusion pumps are known per se and need not be described in detail. The arrows 38 and 39 above and below the infusion tube 5 indicate the direction of flow. The motor 17a with its electric leads 17 is provided as drive means and is coupled by means of a coupling pin 54 through a worm drive, as can be seen in FIG. 6. Mounting lugs 20 and 21 correspond to the mounting lugs 22 and 23 shown in FIG. 3.
As already mentioned, it is of great importance that by means of the two screws 33 and 34 the unit consisting of the drive motor 170 and the infusion pump can also be easily and simply mounted on the casing 2, 3. In addition, another important feature of the invention is that provision may also be made for electronic elements or components in the casing 2, 3, to be replaced by other elements or components for different functions, so that the apparatus is suitable for the most diverse purposes, in accordance with a module principle.
FIG. 7 shows the end of the infusion tube 5, in which in a further embodiment of the invention a ball valve having the valve casing 43 is disposed, the valve casing containing a valve ball 47 loaded by a spring 38. In FIG. 7 the ball 47 has been lifted off its valve seat 39 by an extension 40 of the injection needle 4] so that the flow in the direction of the needle 41 is permitted.
FIG. 8 on the other hand shows the situation when the needle holder 44 has been pulled off the valve casing 43 in the downward direction, so that the valve ball 47 loaded by the spring 38 is pressed onto its seat 39 and the infusion liquid can no longer flow out.
The lower part of FIG. 8 shows clearly that the injection needle 41 is provided with the previously mentioned extension 40. The latter may also be formed by the use of a slightly longer needle, the inlet 45a of which however lies, at least in part, slightly lower than the end 45. The dimensions are here shown greatly exaggerated, and inpractice the distance may amount to only a few millimetres.
In another embodiment which is not illustrated, an intermediate part may be disposed between the needle 41 and the mounting 46 of the valve casing 43, the latter being provided with an extension of this kind, namely the extension 40, in order to enable a conventional needle 41 to be used, in which case this needle need not have the extra length. This will be immediately understandable to the specialist, so that this arrangement need not be illustrated.
In all cases the attachment or extension 40 ensures that the valve is closed immediately when the needle is pulled off.
In this way the apparatus provides the advantage that accidental flow is reliably prevented and in addition the apparatus can be arranged in this case to give an alarm signal.
Because of the spring-loaded ball 47 the infusion tube is continuously closed when not in use and only when the doctor or nurse fastens the needle or the previously mentioned intermediate part to the valve will the valve ball be lifted off its seat and allow the infusion liquid to flow through.
If the connection between the tube and the needle or the abovementioned intermediate part should now be broken by the patient, the ball is pressed back onto its valve seat by the spring, and the tube is immediately closed, so that no further infusion liquid can flow out. The tube, is thus immediately filled with liquid and an alarm signal may be operated by an electrical device, whereby staff can be summoned.
Another problem arises in heating an infusion liquid, for example blood, before the infusion. It is already known for the blood to be brought to the temperature of about 37 before being introduced into the infusion flask. This however entails the disadvantage that a certain cooling occurs during the filling of the flask. Since the infusion is known to take a long time, the blood will in the meantime cool further.
Through the incorporation of heat radiation source 42 as shown in FIGS. 1 and 2 there is the advantage that the infusion liquid does not need to be heated before commencement of the infusion but on the contrary the infusion can commence immediately. The blood is heated on its path from the flask l to the tube 5. The heat radiation source may also act over other regions of the flask 1 and/or of the tube 5, and also of the drip chamber 9. It is thus possible for the radiator to be disposed in other positions than those shown in FIGS. 1 and 2. It is also within the scope of the invention for the entire infusion flask to be heated.
I claim:
1. Infusion apparatus comprising:
a. a pair of laterally spaced, hollow casing sections having top and bottom ends and defining a space between them,
b. an infusion flask mounting flange at the top end of the casing sections spanning the space between them,
0. an infusion flask mounted on the mounting flange in inverted position,
d. drop sensor means mounted on the casing sections adjacent the top end thereof and operatively spanning the space between the casing sections,
e. a drip chamber communicating with the infusion flask and positioned freely in the space between the casing sections for sensing by the drop sensor means,
f. infusion outfeed control means mounted on the casing sections adjacent the bottom end thereof and operatively spanning the space between the casing sections, and
g. an infusion tube communicating with the drip chamber and extending downward therefrom freely through the space between the casing sections and operatively connected to the outfeed control means.
2. The infusion apparatus of claim 1 wherein the infusion tube is provided at its outfeed end with a valve body housing a spring-loaded ball valve, an injection needle adapted for removable attachment to the valve body, and valve operator means operatively associated with the needle independently of the infeed end of the needle for engaging and unseating the ball valve when the needle is attached to the valve body, for the unobstructed flow of infusion liquid into the infeed end of the needle.
3. The infusion apparatus of claim 2 wherein the valve operator means comprises an arcuate segment extension of the wall of the injection needle.
4. The infusion apparatus of claim 1 wherein the infusion outfeed control means comprises a drip valve including two clamp jaws of which at least one is connected to one end of an elongated lever provided with a pivot adjacent said end, and a control electro magnet engages the lever adjacent the opposite end thereof for pivoting the lever.
5. The infusion apparatus of claim 4 wherein the other of said two clamp jaws is connected to one end of a second elongated lever provided adjacent said end with the same pivot as the first named lever, and an eccentric adjusting pin engages the second lever adjacent the opposite end thereof for adjusting the position of the second jaw.
6. The infusion apparatus of claim 4 including spring means engaging the lever for returning the associated clamp jaw to unclamping position. l l

Claims (6)

1. Infusion apparatus comprising: a. a pair of laterally spaced, hollow casing sections having top and bottom ends and defining a space between them, b. an infusion flask mounting flange at the top end of the casing sections spanning the space between them, c. an infusion flask mounted on the mounting flange in inverted position, d. drop sensor means mounted on the casing sections adjacent the top end thereof and operatively spanning the space between the casing sections, e. a drip chamber communicating with the infusion flask and positioned freely in the space between the casing sections for sensing by the drop sensor means, f. infusion outfeed control means mounted on the casing sections adjacent the bottom end thereof and operatively spanning the space between the casing sections, and g. an infusion tube communicating with the drip chamber and extending downward therefrom freely through the space between the casing sections and operatively connected to the outfeed control means.
2. The infusion apparatus of claim 1 wherein the infusion tube is provided at its outfeed end with a valve body housing a spring-loaded ball valve, an injection needle adapted for removable attachment to the valve body, and valve operator means operatively associated with the needle independently of the infeed end of the needle for engaging and unseating the ball valve when the needle is attached to the valve body, for the unobstructed flow of infusion liquid into the infeed end of the needle.
3. The infusion apparatus of claim 2 wherein the valve operator means comprises an arcuate segment extension of the wall of the injection needle.
4. The infusion apparatus of claim 1 wherein the infusion outfeed control means comprises a drip valve including two clamp jaws of which at least one is connected to one end of an elongated lever provided with a pivot adjacent said end, and a control electro magnet engages the lever adjacent the opposite end thereof for pivoting the lever.
5. The infusion apparatus of claim 4 wherein the other of said two clamp jaws is connected to one end of a second elongated lever provided adjacent said end with the same pivot as the first named lever, and an eccentric adjusting pin engages the second lever adjacent the opposite end thereof for adjusting the position of the second jaw.
6. The infusion apparatus of claim 4 including spring means engaging the lever for returning the associated clamp jaw to unclamping position.
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US4532414A (en) * 1980-05-12 1985-07-30 Data Chem., Inc. Controlled temperature blood warming apparatus
US4778450A (en) * 1979-07-12 1988-10-18 Baxter Travenol Laboratories, Inc. Fluid flow control system
US5395320A (en) * 1992-06-09 1995-03-07 Sabratek Corporation Programmable infusion pump with interchangeable tubing
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US5609575A (en) * 1994-04-11 1997-03-11 Graseby Medical Limited Infusion pump and method with dose-rate calculation
US5620312A (en) * 1995-03-06 1997-04-15 Sabratek Corporation Infusion pump with dual-latching mechanism
US5628619A (en) * 1995-03-06 1997-05-13 Sabratek Corporation Infusion pump having power-saving modes
US5637093A (en) * 1995-03-06 1997-06-10 Sabratek Corporation Infusion pump with selective backlight
US5795327A (en) * 1995-03-06 1998-08-18 Sabratek Corporation Infusion pump with historical data recording
WO1998038953A1 (en) * 1997-03-03 1998-09-11 Medical Solutions, Inc. Method and apparatus for pressure infusion and temperature control of infused liquids
US5904668A (en) * 1995-03-06 1999-05-18 Sabratek Corporation Cassette for an infusion pump
US6229957B1 (en) * 1999-05-14 2001-05-08 Joseph Baker Physiological fluid warming process and apparatus
WO2001056638A1 (en) * 2000-02-02 2001-08-09 A. Atlantis S.A. Heating system for warming a physiologic fluid to be infused into a patient
WO2001080928A3 (en) * 2000-04-21 2002-02-21 Schering Ag Fluid delivery systems, injector systems and methods of fluid delivery
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US20030004470A1 (en) * 2001-07-02 2003-01-02 Barry Hickerson Method and apparatus for managing temperature and flow of medical fluids
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US7090658B2 (en) 1997-03-03 2006-08-15 Medical Solutions, Inc. Temperature sensing device for selectively measuring temperature at desired locations along an intravenous fluid line
WO2007048414A1 (en) 2005-10-27 2007-05-03 Hotwatch Aps Portable device for heating intravenous fluids
WO2007075280A1 (en) * 2005-12-29 2007-07-05 Ethicon, Inc. Pressurized fluid reservoir for an infusion system
US7276675B2 (en) 1997-04-07 2007-10-02 Patented Medical Solutions, Llc Medical item thermal treatment systems and method of monitoring medical items for compliance with prescribed requirements
US7611504B1 (en) 2004-03-09 2009-11-03 Patented Medical Solutions Llc Method and apparatus for facilitating injection of medication into an intravenous fluid line while maintaining sterility of infused fluids
US7740611B2 (en) 2005-10-27 2010-06-22 Patented Medical Solutions, Llc Method and apparatus to indicate prior use of a medical item
US8226293B2 (en) 2007-02-22 2012-07-24 Medical Solutions, Inc. Method and apparatus for measurement and control of temperature for infused liquids
US8226605B2 (en) 2001-12-17 2012-07-24 Medical Solutions, Inc. Method and apparatus for heating solutions within intravenous lines to desired temperatures during infusion
US9108047B2 (en) 2010-06-04 2015-08-18 Bayer Medical Care Inc. System and method for planning and monitoring multi-dose radiopharmaceutical usage on radiopharmaceutical injectors
US9119912B2 (en) 2001-03-12 2015-09-01 Medical Solutions, Inc. Method and apparatus for controlling pressurized infusion and temperature of infused liquids
US9211381B2 (en) 2012-01-20 2015-12-15 Medical Solutions, Inc. Method and apparatus for controlling temperature of medical liquids
US9656029B2 (en) 2013-02-15 2017-05-23 Medical Solutions, Inc. Plural medical item warming system and method for warming a plurality of medical items to desired temperatures
CN110960750A (en) * 2019-11-11 2020-04-07 云南大学 Intelligent Internet of things monitoring system and method for intravenous drip
US10780258B2 (en) 2015-03-10 2020-09-22 Life Warmer Inc. Thermic infusion system
US11707580B2 (en) 2017-09-08 2023-07-25 Life Warmer Inc. Thermic infusion system dry tube detector

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Cited By (59)

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US4778450A (en) * 1979-07-12 1988-10-18 Baxter Travenol Laboratories, Inc. Fluid flow control system
US4532414A (en) * 1980-05-12 1985-07-30 Data Chem., Inc. Controlled temperature blood warming apparatus
US5395320A (en) * 1992-06-09 1995-03-07 Sabratek Corporation Programmable infusion pump with interchangeable tubing
US5609575A (en) * 1994-04-11 1997-03-11 Graseby Medical Limited Infusion pump and method with dose-rate calculation
WO1996005882A1 (en) * 1994-08-24 1996-02-29 Baxter International Inc. Medical tubing connector
US5628619A (en) * 1995-03-06 1997-05-13 Sabratek Corporation Infusion pump having power-saving modes
US5993420A (en) * 1995-03-06 1999-11-30 Sabratek Corporation Cassette for an infusion pump
US5637093A (en) * 1995-03-06 1997-06-10 Sabratek Corporation Infusion pump with selective backlight
US5766155A (en) * 1995-03-06 1998-06-16 Sabratek Corporation Infusion pump with selective backlight
US5791880A (en) * 1995-03-06 1998-08-11 Sabratek Corporation Infusion pump having power-saving modes
US5795327A (en) * 1995-03-06 1998-08-18 Sabratek Corporation Infusion pump with historical data recording
US5620312A (en) * 1995-03-06 1997-04-15 Sabratek Corporation Infusion pump with dual-latching mechanism
US5904668A (en) * 1995-03-06 1999-05-18 Sabratek Corporation Cassette for an infusion pump
US7090658B2 (en) 1997-03-03 2006-08-15 Medical Solutions, Inc. Temperature sensing device for selectively measuring temperature at desired locations along an intravenous fluid line
US8920387B2 (en) 1997-03-03 2014-12-30 Medical Solutions, Inc. Method and apparatus for pressure infusion and temperature control of infused liquids
WO1998038953A1 (en) * 1997-03-03 1998-09-11 Medical Solutions, Inc. Method and apparatus for pressure infusion and temperature control of infused liquids
US7540864B2 (en) 1997-03-03 2009-06-02 Medical Solutions, Inc. Temperature sensing device for selectively measuring temperature at desired locations along an intravenous fluid line
US8313462B2 (en) 1997-03-03 2012-11-20 Medical Solutions, Inc. Method and apparatus for pressure infusion and temperature control of infused liquids
US7942851B2 (en) 1997-03-03 2011-05-17 Medical Solutions, Inc. Method and apparatus for pressure infusion and temperature control of infused liquids
US6824528B1 (en) 1997-03-03 2004-11-30 Medical Solutions, Inc. Method and apparatus for pressure infusion and temperature control of infused liquids
US7276675B2 (en) 1997-04-07 2007-10-02 Patented Medical Solutions, Llc Medical item thermal treatment systems and method of monitoring medical items for compliance with prescribed requirements
US7417205B2 (en) 1997-04-07 2008-08-26 Patented Medical Solutions, Llc Medical item thermal treatment systems and method of monitoring medical items for compliance with prescribed requirements
US7041941B2 (en) 1997-04-07 2006-05-09 Patented Medical Solutions, Llc Medical item thermal treatment systems and method of monitoring medical items for compliance with prescribed requirements
US7307245B2 (en) 1997-04-07 2007-12-11 Patented Medical Solutions, Llc Medical item thermal treatment systems and method of monitoring medical items for compliance with prescribed requirements
US6468242B1 (en) 1998-03-06 2002-10-22 Baxter International Inc. Medical apparatus with patient data recording
US6566631B2 (en) 1999-03-30 2003-05-20 Medical Solutions, Inc. Method and apparatus for monitoring temperature of intravenously delivered fluids and other medical items
US6722782B2 (en) 1999-03-30 2004-04-20 Medical Solutions, Inc. Method and apparatus for monitoring temperature of intravenously delivered fluids and other medical items
US6467953B1 (en) 1999-03-30 2002-10-22 Medical Solutions, Inc. Method and apparatus for monitoring temperature of intravenously delivered fluids and other medical items
US8821011B2 (en) 1999-03-30 2014-09-02 Medical Solutions, Inc. Method and apparatus for monitoring temperature of intravenously delivered fluids and other medical items
US6229957B1 (en) * 1999-05-14 2001-05-08 Joseph Baker Physiological fluid warming process and apparatus
WO2001056638A1 (en) * 2000-02-02 2001-08-09 A. Atlantis S.A. Heating system for warming a physiologic fluid to be infused into a patient
US6471674B1 (en) 2000-04-21 2002-10-29 Medrad, Inc. Fluid delivery systems, injector systems and methods of fluid delivery
US6972001B2 (en) 2000-04-21 2005-12-06 Medrad, Inc. Fluid delivery system having pump systems, check valves and a removable patient interface
WO2001080928A3 (en) * 2000-04-21 2002-02-21 Schering Ag Fluid delivery systems, injector systems and methods of fluid delivery
US6699219B2 (en) 2000-04-21 2004-03-02 Medrad, Inc. Fluid delivery systems, injector systems and methods of fluid delivery
US9119912B2 (en) 2001-03-12 2015-09-01 Medical Solutions, Inc. Method and apparatus for controlling pressurized infusion and temperature of infused liquids
US20030004470A1 (en) * 2001-07-02 2003-01-02 Barry Hickerson Method and apparatus for managing temperature and flow of medical fluids
US8226605B2 (en) 2001-12-17 2012-07-24 Medical Solutions, Inc. Method and apparatus for heating solutions within intravenous lines to desired temperatures during infusion
US9492624B2 (en) 2001-12-17 2016-11-15 Medical Solutions, Inc. Method and apparatus for heating solutions within intravenous lines to desired temperatures during infusion
US8920372B2 (en) 2001-12-17 2014-12-30 Medical Solutions, Inc. Method and apparatus for heating solutions within intravenous lines to desired temperatures during infusion
US7611504B1 (en) 2004-03-09 2009-11-03 Patented Medical Solutions Llc Method and apparatus for facilitating injection of medication into an intravenous fluid line while maintaining sterility of infused fluids
US8845586B2 (en) 2004-03-09 2014-09-30 Patented Medical Solutions Llc Method and apparatus for facilitating injection of medication into an intravenous fluid line while maintaining sterility of infused fluids
WO2007048414A1 (en) 2005-10-27 2007-05-03 Hotwatch Aps Portable device for heating intravenous fluids
US20080281268A1 (en) * 2005-10-27 2008-11-13 Hotwatch Aps Portable Device for Heating Up Intravenous Fluids
US8444599B2 (en) 2005-10-27 2013-05-21 Patented Medical Solutions, Llc Method and apparatus to indicate prior use of a medical item
US8636691B2 (en) 2005-10-27 2014-01-28 Patented Medical Solutions, Llc Method and apparatus to indicate prior use of a medical item
US7740611B2 (en) 2005-10-27 2010-06-22 Patented Medical Solutions, Llc Method and apparatus to indicate prior use of a medical item
US7704230B2 (en) 2005-12-29 2010-04-27 Ethicon, Inc. Pressurized fluid reservoir for an infusion system
WO2007075280A1 (en) * 2005-12-29 2007-07-05 Ethicon, Inc. Pressurized fluid reservoir for an infusion system
US20070156103A1 (en) * 2005-12-29 2007-07-05 Etan Chatlynne Pressurized fluid reservoir for an infusion system
US8226293B2 (en) 2007-02-22 2012-07-24 Medical Solutions, Inc. Method and apparatus for measurement and control of temperature for infused liquids
US9108047B2 (en) 2010-06-04 2015-08-18 Bayer Medical Care Inc. System and method for planning and monitoring multi-dose radiopharmaceutical usage on radiopharmaceutical injectors
US9463335B2 (en) 2010-06-04 2016-10-11 Bayer Healthcare Llc System and method for planning and monitoring multi-dose radiopharmaceutical usage on radiopharmaceutical injectors
US9211381B2 (en) 2012-01-20 2015-12-15 Medical Solutions, Inc. Method and apparatus for controlling temperature of medical liquids
US9764100B2 (en) 2012-01-20 2017-09-19 Medical Solutions, Inc. Method and apparatus for controlling temperature of medical liquids
US9656029B2 (en) 2013-02-15 2017-05-23 Medical Solutions, Inc. Plural medical item warming system and method for warming a plurality of medical items to desired temperatures
US10780258B2 (en) 2015-03-10 2020-09-22 Life Warmer Inc. Thermic infusion system
US11707580B2 (en) 2017-09-08 2023-07-25 Life Warmer Inc. Thermic infusion system dry tube detector
CN110960750A (en) * 2019-11-11 2020-04-07 云南大学 Intelligent Internet of things monitoring system and method for intravenous drip

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