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Laser Doppler Flow

Modular construction...extreme flexibility

MP systems offer features to support nearly every physiological recording scenario. The following advanced features apply to the application you selected.

If you don't see an Advanced Feature that interests you, please contact BIOPAC so we can identify the best solution for your particular need.

Advantages of Laser Doppler Flowmetry

Principally, Laser Doppler Flowmetry (LDF) makes use of the fact that when a coherent, low-powered laser illuminates tissue, light is scattered in static structures as well as in moving blood cells within the microcirculatory beds. Photons, scattered by the moving blood cells, are spectrally broadened according to the Doppler effect. LDF is established as an […]

Allergies

The nasal skin and mucosa are often subject to allergic reaction. To evaluate micro-vascular blood flow of the skin, standard surface probes (TSD146) are suitable. To perform measurements on the nasal mucosa, use needle probes (TSD144, TSD145) with the appropriate clamp. Flow max Flow min Mean flow Heart rate

Automatic Data Reduction Using Epoch Analysis

Use the powerful Epoch Analysis data reduction function to reduce large (24-hour) data files to manageable sizes. Analyze both primary signals (such as arterial blood pressure) and derived data (such as Systolic BP). Extract basic measurements from fixed width segments of data. Set “epoch” width to any time interval and key off of scored event […]

Cerebral Blood Flow

Laser Doppler monitoring of cerebral blood flow can be performed with many different types of fiber-optic probes, dependent on the size and location of the area to be investigated. To measure subcutaneous micro-vascular blood flow, use needle (TSD144, TSD145) or disposable fiber (TSD147A or TSD147AL) probes. For cutaneous measurements, use surface (TSD140 or TSD146) or suturable […]

Irritants and Inflammation

Evaluate skin reactions resulting from hypersensitivity and inflammatory mediators. To measure micro-vascular blood flow on the skin surface, use the TSD140 or TSD146 probes. To objectively quantify the flow changes resulting from inflammation, take a real-time measurement of the mean or median value of the LDF100C flow signal. Flow max Flow min Mean flow Heart rate

Laser Doppler Flow Data Analysis

Full Online Pulsatile Flow Data Analysis The software will provide full online analysis of pulsatile flow data for each cardiac cycle. Use the automatic data reduction function to determine statistical measurements over a user-defined time period.

Planted Tissue

Flaps and planted tissues typically exhibit changes in blood flow after the planting procedure. The MP System can be programmed to control a visual or auditory alarm if the mean or peak-to-peak blood flow signals from the LDF100C drop below a specified level. Use AcqKnowledge to isolate pulsatile signals and evaluate the peak-to-peak values in real […]

Rheumatology

Research the micro-vascular blood flow changes resulting from different rheumatic disorders, such as rheumatoid arthritis, Raynauds phenomenon and connective tissue disease. For investigations of Raynauds phenomenon, use the digit probe (TSD142). To assess ischemia of the small intestine, use needle probes (TSD144, TSD145).

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Basic principles of physiological data collection covers fundamentals of data collection and equipment configuration equipment to help you refine experiment protocols and avoid costly missteps. Frazer Findlay, CEO of BIOPAC, discusses common mistakes with physiology recording and shares his secrets for collecting great data. Topics include: How to prep a subject and where to place electrodes; Which type of electrodes work for different body signals; Analog to Digital Conversion; Sample rates (correct vs. incorrect); Filtering; and Scaling and calibration.
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