PATENT CLAIM ANALYSIS

Application Number: 15769654
Application Type: Utility
Filing Date: 2018-04
Publication Date: 2018-11
Patent Classification: ["702", "050000"]

Abstract:
A method for detecting an occlusion in an infusion line ( 3 ) connected to an infusion device ( 1 ) comprises: measuring a force (F) applied to a piston ( 21 ) by a pusher device ( 12 ) of an infusion device ( 1 ) for moving the piston ( 21 ) along a movement direction (X) into a cylindrical tube ( 20 ) in order to deliver a medical fluid from the cylindrical tube ( 21 ) towards an infusion line ( 3 ) connected to the cylindrical tube ( 20 ); calculating, from the measured force (F), a value indicative of a pressure (P) in the cylindrical tube ( 20 ), wherein for calculating said value indicative of said pressure (P) a frictional force value (FO) indicative of a friction of the piston ( 21 ) relative to the cylindrical tube ( 20 ) is taken into account; and comparing said value indicative of said pressure (P) to a threshold value to determine whether an occlusion is present in the infusion line ( 3 ). Herein, the frictional force value (F 0 ) is determined using a mathematical model modelling the friction of the piston ( 21 ) relative to the cylindrical tube ( 20 ) in dependence on the position of the piston ( 21 ) relative to the cylindrical tube ( 20 ) along the movement direction (X) and in dependence on the velocity by which the piston ( 21 ) is moved relative to the cylindrical tube ( 3 ). In this way a method for reliably detecting an occlusion in an infusion line during an infusion process is provided.

Claim (Index 15):
A method for detecting an occlusion in an infusion line connected to an infusion device comprising\n (a) measuring a force applied to a piston by a pusher device of an infusion device for moving the piston along a movement direction into a cylindrical tube in order to deliver a medical fluid from the cylindrical tube towards an infusion line connected to the cylindrical tube,\n calculating, from the measured force, a value indicative of a pressure in the cylindrical tube, wherein for calculating said value indicative of said pressure a frictional force value indicative of a friction of the piston relative to the cylindrical tube is taken into account, \n comparing said value indicative of said pressure to a threshold value to determine whether an occlusion is present in the infusion line, \n wherein the frictional force value is determined using a mathematical model modelling the friction of the piston relative to the cylindrical tube in dependence on a position of the piston relative to the cylindrical tube along the movement direction and in dependence on a velocity by which the piston is moved relative to the cylindrical tube. \n and \n (b) measuring a force applied to a piston by a pusher device of an infusion device for moving the piston along a movement direction into a cylindrical tube in order to\n deliver a medical fluid from the cylindrical tube towards an infusion line connected to the cylindrical tube, \n calculating, from the measured force, a value indicative of a pressure in the cylindrical tube, wherein for calculating said value indicative of said pressure a frictional force value indicative of a friction of the piston within the cylindrical tube is taken into account, \n comparing said value indicative of said pressure to a threshold value to determine whether an occlusion is present in the infusion line, \n determining, at a current position of the piston, a slope value associated with the measured force at the current position of the piston as the piston is moved along the movement direction, and \n if the slope value lies within a predetermined range, assuming that the frictional force value is equal to the measured force at a position prior to the current position for calculating said value indicative of said pressure \n wherein the steps of (a) and (b) are carried out in parallel during an infusion operation performed by the infusion device.

Metadata:
- Claim Count in Document: 32.0
- Percentile: 91.0
- Lexical Diversity: 3.41573
- Patent Class: 702.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['11323104', '14152150', '13099212', '14152423', '14688769']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.1786087633724928
- 35 USC 102 Novelty (BERT): 0.4929157503830822
- Combined Prediction Score: 0.2100394620735517
- Mean Citation Score: 191.9446
- Max Citation Score: 194.0792
- Similarity Product: 130.51100005865095

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 0

Dataset: test