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DVT detection

A technology for detection systems and parts, applied in blood flow measurement, diagnostic recording/measurement, medical science, etc., can solve problems such as not always reliable

Inactive Publication Date: 2007-09-19
KCI LICENSING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However plethysmography requires the patient to exercise during the test (which is not suitable for all patients) and the test requires a professional operator and is not always reliable

Method used

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Embodiment Construction

[0020] Referring to Figures 1 and 2, the present invention comprises a light transmission and detection system comprising a sensor 1, 2 comprising an LED and photodetector with suitable amplifiers 3, 4 as shown in Figure 2 . Once the sensors 1 , 2 are attached to the skin, the central control unit 5 calibrates the sensors by driving the LED 1 with a suitable voltage detecting the intermediate voltage from the photodetector 2 . The photodetector 2 signal is digitized by A / D1 and A / D2. The driving voltage for the LED is generated from the output of D / A1 and D / A2. Once the standard process is complete, the central control unit 5 collects data from the photodetectors 4 (Fig. 2) at a sampling rate appropriate for the application. For DVT detection, a sampling rate of 6 Hz is used. A user input device 6 such as a keypad and a display for output such as an LCD screen or LED indicators or the like are used. Input / output ports for PC connection, printer or other form of data entry d...

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PUM

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Abstract

A device comprising a light transmission and detection system having transducers (1, 2, 7, 8), control means (5) and output means (7). The transducers are placed at various sites on the body of a patient and the light absorbed and / or reflected at these sites is measured and signals related to vasomotor activity are collected. The output can take the form of a detailed display of the vasomotor signals collected from the transducers (1, 2, 7, 8) to a simple indication of a condition present or absent. For, example, the presence of a unilateral DVT can be detected by measuring the dissimilarity between two transducer signals from the soles of a patient's feet. The invention can also be used to provide an indication or not of for example, DVT and diabetic peripheral neuropathy.

Description

technical field [0001] The present invention relates to a method for detecting diseases including deep vein thrombosis (DVT) and diabetic peripheral neuropathy, critical limb ischemia, autonomic nervous function and arterial and venous diseases by assessing vasomotor activity in the microcirculation at individual parts of the body. A range of clinical conditions, and in particular detects deep vein thrombosis (DVT) and diabetic peripheral neuropathy. Background technique [0002] Deep vein thrombosis (DVT) in the legs is a condition in which a blood clot forms in a vein, causing a partial or complete blockage of the blood vessel. Embolic origin can be attributed to vascular injury due to periods of hemostasis caused by surgical procedures or trauma, or prolonged inactivity (eg, long-distance flight, disability). The apparent consequences of DVT can vary from mild pain and swelling to fatal pulmonary embolism. [0003] Known tests used in clinical practice to detect DVT inc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/026A61B5/00
CPCA61B5/0059A61B5/6829A61B5/02007A61B5/4035A61B5/02416
Inventor 奈杰尔·高夫
Owner KCI LICENSING INC
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