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extracorporeal blood treatment device

An extracorporeal blood treatment and blood technology, applied in blood filtration, other medical devices, suction devices, etc.

Active Publication Date: 2017-03-01
GAMBRO LUNDIA AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] - how long these patients will suffer from renal insufficiency is unknown; thus, the total treatment time is not known in advance and therefore, it cannot be used as a setting parameter;

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0212] Figure 5 A first example of implementation of the control process already described herein above is shown.

[0213] In this embodiment, the control process includes:

[0214] - Determined at detection point T i previous time period T retro The value V of fluid removed from the patient pfr_removed ;

[0215] - Determined at detection point T i After the time period T prosp The value V of the fluid that will be removed from the patient pfr_need , so as to realize the detection point T i previous time period T retro and detection point (T i ) after the time period T prosp The total time period fluid withdrawal rate Q pfr The set value Q of pfr_set ;exist Figure 5 Medium, T retro equal to T prosp : of course this can be the preferred choice, it should be noted that T retro Can also be used with T prosp different.

[0216] - Setpoint Q based on fluid withdrawal rate pfr_set , at the detection point (T i ) after the time period T prosp The value of the ...

example 2

[0239] Image 6 A second example of the implementation of the control process already described herein above is shown.

[0240] In this case, the procedure aims to achieve the most accurate patient fluid withdrawal over a predefined period of time. In this example, multiple time periods of constant duration ΔT are preset, starting at preset time T00:

[0241] T 00 ;T 00 +ΔT;…;T 00 +k·ΔT

[0242] and ends at the preset end time

[0243] T 00 +ΔT;T 00 +2ΔT;…;T 00 +(k+1)·ΔT.

[0244] In this variant, the purpose of the control unit 10 is to deliver precise patient fluid withdrawal instructions within a predefined time window, eg to match staff shifts or simply "on the hour" (13:00, 14:00, 15:00, ...).

[0245] When calculating the instantaneous Q pfr_new , the "detection point T" can be completed as follows i ":

[0246] - at each processing interruption (downtime);

[0247] - every time the flow setting is changed;

[0248] - at each predefined time window limit ...

example 3

[0283] The following example and example 2 (reference image 3 and Image 6 ) similarly, showing the effective part T eff is calculated and used, in this case by placing the detection point T i The duration of the subsequent time period is reduced by a first amount associated with the average bag change time expected to take in the following time period and a second amount associated with downtime due to an alarm condition to determine the effective portion T eff .

[0284] Apply algorithm (6) to image 3 device, assuming:

[0285] - Operator initial setting Q pfr_set =100ml / h;

[0286] - Predefined time windows: 0:00; 4:00; 8:00; 12:00; 16:00; 20:00;

[0287] - Detection time T i : 10:30;

[0288] - The actual fluid withdrawn within [4:00; 8:00] measured by scale 33 is V pfr(k-1) =396ml;

[0289] - The fluid actually withdrawn in [4:00; 10:30] measured by the scale 33 is V pfr(0) =245ml;

[0290] - The number of bag changes planned in [10:30; 12:00] is: N change...

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Abstract

An extracorporeal blood treatment device (1), comprising: a filter unit (2), a blood withdrawal line (6), a blood return line (7), a discharge fluid line (13), a pre-dilution fluid line connected to the blood withdrawal line and / or post-dilution fluid lines (15, 25), and dialysis fluid lines. Pumps (17, 18, 21, 22, 27) act on the fluid lines to regulate fluid flow. The control unit (10) is configured to periodically calculate a new value for the patient fluid withdrawal rate to be applied to the ultrafiltration actuator such that a predefined patient fluid withdrawal rate is maintained for a reference time interval, while the machine Downtime is irrelevant.

Description

technical field [0001] The present invention relates to an extracorporeal blood treatment device. Background technique [0002] Extracorporeal blood processing involves removing blood from a patient, processing the blood outside the patient, and returning the processed blood to the patient. Typically, extracorporeal blood treatment is used to withdraw undesirable substances or molecules from a patient's blood and add desirable substances or molecules to the blood. Extracorporeal blood treatment is suitable for patients who cannot effectively remove substances from their blood, such as when the patient suffers from temporary or permanent kidney failure. These and other patients may undergo extracorporeal blood treatment to add substances to or remove substances from their blood, eg, to maintain acid-base balance or to remove excess body fluids. [0003] Extracorporeal blood treatment is typically accomplished by, for example, removing blood from a patient in a continuous fl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61M1/16A61M1/34
CPCA61M1/1643A61M1/341A61M1/3431A61M1/3434A61M1/16A61M1/34A61M1/3413A61M2205/3393A61M2205/3334A61M1/3441A61M1/3451A61M2205/502A61M1/1605A61M1/361A61M1/3403A61M2205/18A61M2205/505A61M2205/52A61M1/1647A61M1/3638
Inventor 多米尼克·普丘林
Owner GAMBRO LUNDIA AB
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