Vertical probes

SS-1
[Click on probe to enlarge pictures]

Probes consist of one fibre that emits light from the laser/white light source into tissue (emission LF) and several detecting fibres (DF). The detecting fibre with the longest distance from the illuminating fibre measures most deeply.

For measurements in high depth of tissue particular big probes have been developed.

For more details see Technical Data.

The vertical probe can be applied on tissue with a special cap.

Choose your probes by

• way of application
• measurement depth

Connection to the O2C

The probes are connected to the O2C simply by plugging in one connector. No difficult connection of single fibres or screwing is necessary.

You can measure simultaneously with two different probes.

Application on the measurement site

The probes have to be applied without pressure to avoid influence on microcirculation, but firm enough on the tissue to avoid movement artifacts.

Vertical probes can also be applied by tape or can be held by hand. The cap helps avoiding pressure by increasing application surface. The vertical probe can be used for application sites like deep wounds and the mouth, where the flat probe has no access.

For exact measurement it is necessary to fix probes properly:

• Apply probe without pressure and without causing venous congestion (e.g. by fixation on finger with a tape). The probe is usually fixated properly, when hemoglobin amount and blood flow do not decrease after fixation.
• Fix the probe tubing with a strain relief to avoid movement artifacts. Check movement artifacts on display.

General construction of the probes

The probes consist of glass fibres, that send white light and laser light into tissue and that send the signal from tissue back to the main device.

They differ in

• the measurement volume: the higher the distance between illuminating and detecting fibre, the bigger the measurement volume.
• the way of application

If you want to know more about actual probe types available, please contact us. LEA Medizintechnik GmbH has many years of experience in developing sensor technology and measurement probes. Hence we have the know how and the abilities to develop and manufacture customized probes for your special needs.