Method of monitoring dislodgement of venous needles in dialysis patients
First Claim
1. A method of detecting a dislodged needle in a hemodialysis procedure, comprising the steps of:
- measuring venous drip pressure for a patient undergoing dialysis;
with a computer-driven analyzer, analyzing the venous drip pressure and deriving intravascular blood pressure at a location of venous needle insertion into the patient;
using the analyzer, comparing the derived intravascular blood pressure to a standard;
repeating said measuring, analyzing and deriving steps to determine a plurality of intravascular blood pressures, and repeating said comparing step; and
if one of the plurality of intravascular blood pressures is within a specified range of the standard, determining with the analyzer that a needle has been dislodged in the hemodialysis procedure.
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Accused Products
Abstract
A method of detecting a dislodged needle in a hemodialysis procedure includes measuring venous drip pressure of the dialysis machine of a patient undergoing hemodialysis, analyzing the venous drip pressure and deriving intravascular blood pressure at a location of venous needle insertion into the patient, comparing the derived intravascular blood pressure to a standard, repeating the measuring, analyzing and deriving, and comparing steps and, if the intravascular blood pressure is within a specified range of the standard, determining that a needle has been dislodged in the hemodialysis procedure. A method of alerting the patient and medical personnel of a dislodged needle in a hemodialysis procedure includes detecting a drop in intravascular pressure derived from measured venous drip pressure, determining that a needle is dislodged, and alerting medical personnel of the dislodged needle.
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Citations
15 Claims
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1. A method of detecting a dislodged needle in a hemodialysis procedure, comprising the steps of:
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measuring venous drip pressure for a patient undergoing dialysis; with a computer-driven analyzer, analyzing the venous drip pressure and deriving intravascular blood pressure at a location of venous needle insertion into the patient; using the analyzer, comparing the derived intravascular blood pressure to a standard; repeating said measuring, analyzing and deriving steps to determine a plurality of intravascular blood pressures, and repeating said comparing step; and if one of the plurality of intravascular blood pressures is within a specified range of the standard, determining with the analyzer that a needle has been dislodged in the hemodialysis procedure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of detecting a dislodged needle in a hemodialysis procedure, comprising the steps of:
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measuring venous drip pressure for a patient undergoing dialysis; with a computer-driven analyzer, analyzing the venous drip pressure (VDP) and deriving venous access pressure (VAP) in proximity of a location of needle insertion into a patient'"'"'s body; using the analyzer, comparing the derived VAP to a standard; repeating said measuring, analyzing and deriving steps to determine a plurality of VAP values over multiple time periods, and repeating said comparing step; and if one of the plurality of VAP values is within a specified range of the standard, determining with the analyzer that a needle has been dislodged in the hemodialysis procedure. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification