Needle dislodgement detection
First Claim
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1. An apparatus for detecting dislodgement of a needle inserted into a patient comprising:
- a sensor having a capacitive sensor, the capacitive sensor configured to detect wetness due to blood; and
a barrier pad capable of absorbing blood lost from the patient due to the dislodgment of the needle; and
a sensor holder configured to secure the sensor and the barrier pad adjacent to the needle, wherein the sensor holder secures the barrier pad between the sensor and the needle such that the sensor detects blood absorbed within the barrier pad.
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Abstract
An apparatus for detecting dislodgement of a needle inserted into a patient includes a sensor for detecting wetness due to blood and a sensor holder to secure the sensor to the patient such that the sensor detects wetness due to blood loss from the patient upon dislodgement of the needle. Methods and apparatuses for detecting, monitoring and/or controlling blood loss from a patient due to needle dislodgement are also provided.
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Citations
29 Claims
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1. An apparatus for detecting dislodgement of a needle inserted into a patient comprising:
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a sensor having a capacitive sensor, the capacitive sensor configured to detect wetness due to blood; and a barrier pad capable of absorbing blood lost from the patient due to the dislodgment of the needle; and a sensor holder configured to secure the sensor and the barrier pad adjacent to the needle, wherein the sensor holder secures the barrier pad between the sensor and the needle such that the sensor detects blood absorbed within the barrier pad. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus for detecting needle dislodgement during hemodialysis comprising:
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a sensor holder having a cavity; a barrier pad configured to absorb blood lost from the patient due to the dislodgment of the needle; and a capacitive sensor comprising an electrode enclosed within the cavity of the sensor holder such that the capacitive sensor is positioned to detect wetness absorbed within the barrier pad from blood due to needle dislodgement during hemodialysis such that the capacitive sensor detects blood absorbed within the barrier pad. - View Dependent Claims (9, 10, 11)
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12. An apparatus for controlling blood loss from a patient during hemodialysis comprising:
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a barrier pad configured to absorb blood lost from the patient due to the dislodgment of the needle; a capacitive sensor configured to detect wetness due to blood; a sensor holder configured to secure the sensor and the barrier pad adjacent to the patient such that the sensor produces a signal indicative of wetness detected within the barrier due to blood loss from the patient upon dislodgement of a venous needle inserted into the patient wherein the capacitive sensor detects blood absorbed within the barrier pad; and a controller capable of processing the signal to prevent blood flow through the venous needle such that blood loss from the patient due to dislodgement of the venous needle is minimized. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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21. A method of detecting needle dislodgement comprising the steps of:
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providing a barrier pad to absorb blood lost from the patient due to the dislodgment of the needle; and providing a capacitive sensor configured to detect wetness due to blood wherein the sensor detects blood absorbed within the barrier pad; inserting a needle into a patient; and securing the sensor and the barrier pad to the patient such that the sensor detects blood absorbed within the barrier pad on the patient upon dislodgement of the needle. - View Dependent Claims (22)
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23. A method of controlling blood loss from a patient due to needle dislodgement comprising the steps of:
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providing a capacitive sensor configured to detect wetness due to blood; providing a barrier pad to absorb blood lost from the patient due to the dislodgment of the needle; and inserting a needle into the patient; securing the sensor and the barrier pad adjacent to the patient such that the sensor produces a signal indicative of wetness within the barrier pad due to blood loss from the patient upon dislodgement of the needle and detects blood absorbed within the barrier pad; and processing the signal to prevent blood flow through the venous needle such that blood loss from the patient due to needle dislodgement is minimized. - View Dependent Claims (24, 25, 26, 27)
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28. A method of providing dialysis to a patient comprising the steps of:
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providing a barrier pad; providing a capacitive sensor to detect wetness due to blood wherein the sensor does not contact blood upon detection thereof; inserting a venous needle into the patient; securing the sensor and the barrier pad in juxtaposition to the venous needle; passing blood through the venous needle via a hemodialysis machine; and detecting wetness within the barrier pad indicative of blood loss from the patient upon dislodgement of the venous needle such that the sensor detects blood absorbed within the barrier pad. - View Dependent Claims (29)
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Specification