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Active interference-noise cancellation device, and a method in relation thereto

An active noise and equipment technology, applied in medical science, guide wires, sensors, etc., can solve problems such as limited shielding and damage, and achieve the effect of reducing leakage current

Inactive Publication Date: 2014-10-01
圣朱迪医疗合作中心公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the shielding provided is very limited and largely ineffective at low frequencies (<10kHz)
This makes sensor measurements vulnerable to corruption from 50 / 60Hz line voltage interference

Method used

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  • Active interference-noise cancellation device, and a method in relation thereto
  • Active interference-noise cancellation device, and a method in relation thereto
  • Active interference-noise cancellation device, and a method in relation thereto

Examples

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Embodiment Construction

[0044] Before turning to the drawings, which illustrate the exemplary embodiments in detail, it is to be understood that the application is not to be limited to the details or instrumentalities set forth in the description or shown in the drawings. It should also be understood that the terminology is for the purpose of description only and should not be regarded as limiting.

[0045] In one embodiment, an active noise cancellation device 2 for a medical device comprises an active circuit having a first input connection 8, a second input connection 10 and an output connection 12; adapted to communicate with a subject A low-impedance body connection electrode 4 in electrical contact with blood flow (eg of a human or animal body) and a feedback branch 14 connecting said output connection 12 with said first input connection 8 .

[0046] refer to Figure 5 , the basic principle of one embodiment of the active noise cancellation device is that the current limiting circuit 18 feeds ...

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Abstract

An active noise cancellation device (2) for a medical device includes an active circuit having a first input connection (8), a second input connection (10), and an output connection (12). The second input connection (10) is connected to at least one predetermined reference signal. The active noise cancellation device (2) further includes a low-impedance body connection electrode (4) adapted to be in electrical contact with a bloodstream of a subject, wherein the low-impedance body connection electrode (4) is connected to said first input connection (8), and a feedback branch (14) connecting the output connection (12) with the first input connection (8). The feedback branch (14) comprises a current limiting circuit (18) to limit a current through said feedback branch (14) to be lower than a predetermined current.

Description

[0001] Cross references to related patent applications [0002] This application claims priority to US Provisional Application No. 61 / 630,097, filed December 5, 2011, which is incorporated herein by reference in its entirety. Background technique [0003] The present invention relates to devices and methods for active noise cancellation applicable to medical intra-body sensors. [0004] During many medical procedures, various physiological conditions present in body cavities need to be monitored. These physiological conditions are usually physical properties - such as pressure, temperature, fluid flow rate, and provide the physician or medical technician with key information about the status of the patient's physiological condition. [0005] One device that is widely used to monitor physiological conditions is a blood pressure sensor. The blood pressure sensor senses the magnitude of the patient's blood pressure and converts it into a typical electrical signal transmitted to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/0215A61M25/09A61B5/00
CPCA61B5/14539A61B5/01A61B5/6851A61B5/065H03H11/12A61B5/026A61B5/7203A61B5/0215A61M25/09
Inventor 芒努斯·萨穆埃尔松
Owner 圣朱迪医疗合作中心公司
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