DE2105453B2 - Medical volume metering device - Google Patents

Description

pulse generated, with the higher total weight- Embodiments of the invention are next-

worth the second switching position and which is explained in more detail by means of the drawing,

set lower weight value the first F i g. 1 shows a schematic representation of a

Switching position triggers. 55 first embodiment in which a scale is the weight of the patient determined;

F i g. 2 shows another embodiment at

where the scales determine the weight of the two containers

The invention relates to a medicinal quantity means.

dosing device, in which over to the patient 60 the abdominal cavity of the patient or another connected lines dosed amounts of blood, body area to which fluids are supplied and nutrients, Chemical solutions and other liquids to be taken are marked with 1. The fluids add or remove fluid from the patient, a chemical solution, is located in the obesen, with a in a higher position than the patient ren container 2, from which they are under the influence of arranged upper container, one in a deep 65 gravity via the supply line 3 to a Umren Position as the patient-arranged lower switching valve 4 flows in the form of a multi-way valve, container, one in the connecting line of this one arranged switching valve and a valve 4 run to area 1, and in this case

3 ⁴

a three-way valve is used. Depending on the switching container 6 on the scales 12 on the ceiling

position of the valve flows either the liquid depends on are.

Upper container to area 1 or from area 1 A rope 13 runs between these containers, see above

Via line 5 to the lower container 6. In Fig. 1 that the balance 12 is the total weight of the upper

leads from the multi-way valve eui own supply channel 7 5 and lower container determined. From the upper container

to area 1 and a ter separated from the supply channel runs the supply line 3, which is used for loading

Return channel 8 back to the valve. This arrangement area 1 and to one with the lower container 6 yer-

Voltage may be more beneficial than using tied line 5 branched with the Y-shaped

a single combined supply and return branch, a switching valve 4 is connected, the

kanais. io in the switching position shown in Figure 2 the above

The device is already working shut off the supply line 3 located in the desired branch

th way and can only under the influence and the outlet line 5 keeps open. In this switching

gravity and without a pump or drive, the liquid in area 1 empties into the

tor dosed amounts of liquid from the upper container lower container 6. If the switching position of the

to area 1 and is changed from area 1 to 15 switching valve 4, the supply line is

discharge lower container 6. However, the bypass 3 must be opened and the line 5 blocked so that

Switching valve 4 depending on the quantity dosing area 1 via the supply line 3 from the upper one

tion can be adjusted in time. Container liquid is supplied. The liquid

Fig. 1 shows an automatic metering device, supply and removal of the area 1 is thus

in which the switching valve 4 is controlled by an actuator 9 ao by switching the switching valve 4,

is controlled by means of a relay 10 and one wherein the switching is automatic by the

Amplifier 11 from an electronic pressure can scale 12 takes place. In this case it is possible there

scale 12 is controlled. to ensure that the scales with two different

With the help of the pressure can scales the chcn weight values are generated a control pulse. It Weight of the patient measured. It is assumed here that the entire preferably four measuring cells are used, each of which is located in the upper container 2 non-liquid. The scales ter a support of the hospital bed can be used. determines the total weight, for example 30 kg. In this case, the aim is to ensure that a. With this weight value, the balance generates a Correct amount of liquid, for example 1 liter per control pulse, which after its amplification the hour, the area 1 at fixed time intervals from the switching valve 4 from the in FIG. Turn over the position shown in FIG Container is fed. The balance shows this switches. Thereupon liquid flows from the upper one in the form of a weight increase and controls the container 2 to area 1, until the scales a low switchover valve such that liquid from the range 1 res indicates weight, for example 20 kg. Then taken and fed to the lower container 6, the balance generates a control pulse which, after its until the weight of the patient again increases the switching valve 4 to the position shown in FIG has reached the given value. The switching valve 4 brings switching position shown in the liquid from Bewird thus through the electronic scales that the rich 1 flows to the lower container 6 until the scales The weight of the patient is determined, and the first weight value is determined again by means of a clock, i.e. in the selected-controlled. The clock sets the 30 kg between the liquid case. Restore this cycle of operation elapsing time intervals, and the 40 catches up again and again, so that the liquid from Balance ensures that one of the supplied liquid upper container 2 in dosed quantities of 1 kg The corresponding amount of liquid flows into area 1 and then from area 1 to is taken. lower container 6 flows. From time to time the

F i g. 2 shows a further exemplary embodiment, with the lower container 6 being emptied and the upper container 2

which both the upper container 2 and the lower 45 are refilled.

1 sheet of drawings

Claims (3)

The transfusion channel that runs from the switch valve to the patent claim: ticQten, which is also due to the severe 1. Medical volume dosing device, with power and without a pump, the liquid supply which is connected to and removed from the patient to and from the patient with the help of the Lines dosed amounts of blood, nutrients, 5 umchemicals regulated according to the amount dosed Solutions and other liquids switching valve is feasible. feed or have removed from the patient, such devices are known (British Pamit a in a higher position than the patient tentschrift 1 053 397, USA.-Patent 2 077 774). arranged upper container, one in a deep By actuating the switch valve by hand is feren position as the patient arranged lower io thereby determines the beginning and end of the infusions. Container, a switch valve arranged in the connecting line of this automatic operation of this volume metering container and a device is not provided.
A device for kidney patients is known to run from the switching valve to the patient, whereby liquid chemicals are pumped out of the patient's abdominal cavity solely by the dosed amounts of liquid chemicals in and gravity and without a pump. Supply and withdrawal to and from the patient. This method requires the abdominal switching valve (4) from an actuator (9) through the patient's cavity, the use of an external electronic scale (12) being controlled, extremely expensive, conventional artificial kidney which measures the weight of the upper container (2) is avoided. However, a greater widening of this patient (1) or of the lower container (6) or a favorable method is associated with the cost of both containers determined together. the ones required to carry out the procedure 2. Dosing device according to claim 1. 25 opposite device. characterized in that the switching valve The object on which the invention is based is (4) is a three-way valve, to which the upper one stands, the device in simple and beBehälters (2) a feed line (3) leads and can be operated automatically in a reliable manner. the one line (5) to the lower container (6) This task is according to the invention in the men runs, with the three-way valve additionally 30 gdosiervorrichtung of the type described above via a single transfusion channel with the solved in that the switching valve of a Area (1) is connected in and out of the actuator controlled by an electronic scale the liquid is conveyed. is what the weight of the upper container, des 3. Quantity dosing device according to claim 1. patient or the lower container or both bed thereby characterized in that the upper container 35 determined holder together. (2) on the balance (12) and the lower container The device according to the invention can be 6. Is hung on the upper container and use the side and operate automatically without from the upper container (2) running downwards to be very expensive, since it is a simple AuI- Supply line (3) to the patient and to a construction and also has operational safety, to the lower container (6) running line 40. (5) is branched, that at the branch a device is neither a pump nor a drive motor adjustable changeover required between two switching positions. How the volume metering upstream valve works (4) is arranged, the one in the first direction is rather controlled by a scale, Switching position blocks the supply line (3) and which depends on the weight of the patient, the upper one Line (5) holds open and common position in the second switching 45 or lower container or both containers the line (S) shuts off and the supply line actuates the changeover valve automatically. device (3) keeps open, and that the control of the metering device according to the invention The changeover valve (4) provided in particular was used as a treatment device weight of the upper and lower container (2.6) developed by patients with kidney disease, but can averaging electronic scales (12) on two and 50 liquids for other treatment purposes feed or remove different weight values from a control in a patient,