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Ultrasound blood-flow monitoring

A blood flow and flow technology, which is applied in blood flow measurement devices, sonic diagnosis, infrasound diagnosis, etc., can solve problems such as expensive equipment and unaccompanied monitoring of patients.

Active Publication Date: 2019-04-16
CIMON MEDICAL AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this analysis must usually be performed by a skilled technician who must always be with the patient
The equipment used to perform this analysis can also be very expensive (eg, over a million dollars for a 3D ultrasound imaging system)
Therefore, these technologies are not suitable for unescorted monitoring of patients in hospital wards

Method used

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  • Ultrasound blood-flow monitoring

Examples

Experimental program
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Embodiment Construction

[0059] figure 1 An ultrasound based blood flow monitoring system 1 is shown. It comprises a piezoelectric ultrasound transducer 2 , a processing unit 3 and a display device 4 . The ultrasound transducer 2 has a single flat circular active element, approximately 10 mm in diameter, contained in a suitable housing. It is connected to the processing unit 3 by wires. The processing unit 3 is connected to a display device 4 .

[0060] The transducer 2 may transmit an ultrasonic plane wave (eg as a series of pulses) under the control of the processing unit 3 and may also receive reflections of the wave. The transducer 2 may be arranged to be secured to a patient 5, eg a premature infant, eg by one or more straps or adhesive pads.

[0061] The transducer 2 can be secured to the patient 5 by a clinician or technician and then left unattended so that the monitoring system 1 monitors microcirculatory blood flow. The monitoring system 1 can output real-time graph data such as blood f...

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Abstract

A system (1) for monitoring blood flow in a patient (5) comprises a first unit (2) having an ultrasound transducer and a fastener for fastening the unit to the patient. A controller subsystem comprises the first unit (2) and a separate second unit (3, 4). The controller subsystem (2, 3, 4) is configured to: control the ultrasound transducer to transmit plane-wave pulses into the patient (5) in a propagation direction; sample reflections of the plane-wave pulses, received at the ultrasound transducer, from a region (13) within the patient (5), to generate pulse-Doppler response signals; and process the pulse-Doppler response signals to estimate a series of values, over time, of a measure proportional, but not equal, to the total blood volume flow passing through the region (13). A monitoring subsystem (3, 4) is configured to monitor the series of values over time and to generate a signal if a set of one or more of the values satisfies a predetermined criterion.

Description

technical field [0001] The present invention relates to the use of ultrasound to monitor blood flow in living organisms. Background technique [0002] There are many clinical situations in which it is helpful to monitor peripheral blood flow in human or animal patients. For example, it may be important to monitor blood flow in the brain of prematurely born babies so that treatment can be initiated quickly if decreased blood flow is detected. It is also useful to monitor the patient's microcirculation in the hours following vascular surgery in order to detect occlusion of peripheral bypasses. [0003] Various techniques have been used to analyze blood flow. These include laser Doppler (Doppler) scanning, near-infrared spectroscopy, and Doppler ultrasound imaging. However, this analysis must usually be performed by a skilled technician who must always be present with the patient. The equipment used to perform this analysis can also be very expensive (eg, over a million dol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B8/06A61B8/08A61B8/00
CPCA61B8/4483A61B8/06A61B8/4236A61B8/54A61B8/4227A61B8/488A61B8/5223A61B8/0891G16H50/30
Inventor 汉斯·拓普托布约恩·赫尔古姆
Owner CIMON MEDICAL AS
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