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Probes
Moor Instruments manufacture a wide range of probes designed to help you assess flow from almost any tissue. We are more than happy to advise on your particular application but hope too that the following general notes are useful.
Skin probes are available with two main fibre configurations, twin or multi-fibre designs. Multi fibre designs usually contain a ring of up to eight collecting fibres around a central delivery fibre. This provides an averaged signal for a larger tissue area than would otherwise be provided by the conventional twin fibre model.
Skin probes are usually fixed to the skin with a probe holder and double sided adhesive discs, although they can be used in other applications (e.g. bone, visceral measurements) and with other equipment (e.g. Iontophoresis). Please refer to the Accessories and Iontophoresis catalogues.
DRT4/TREND users can specify combined laser Doppler and temperature probes.
The standard length for all probes is 2 metres. Longer lengths can be supplied on request (code PXL). The range of probe holders for these (and other) probes is described in the accessories page.
DP1T-V2
A combined temperature and optic probe that delivers light at a right angle to the probe cable
DP1T/7-V2
A combined temperature and optic probe that delivers light at a right angle to the probe cable with …
Needle probes are amongst the most versatile designs. They can be used for surface measurements, inserted into tissue or used for single vessel measurements. The compact design also lends itself to measurements in tissues with restricted access, e.g. teeth, conjunctiva and where micromanipulation is required.
Probes can be fixed in position over tissue with a normal laboratory manipulator by clamping onto the black acetal shank.
Deeper measurements are possible by inserting the probe tip into tissue bulk, for which finer needles are suitable (DP4s). The finest needles can be inserted directly with the application of gentle pressure. Larger needles can still be used although it may be necessary to puncture the tissue first.
The use of specific probe holders can extend the application range of needle probes further still. Wet stick probe tips can be used to aid adhesion to moist/ mucosal surfaces. Dental putty can be used to create an individual probe holder for tooth measurement. Angled needle probes can be used to access hind teeth.
Although laser Doppler is not usually advocated for assessment of flow in single vessels, there is a role for the technique in the assessment of flow changes in small individual vessels. Moor manufactures a range of probe holders to aid this measurement.
Endoscopic probes enable internal investigations of blood flow in tissue beds such as colon, bronchus and urethra. The probes are available in a wide range of diameters to fit the biopsy channel of most endoscopes. All are made from a flexible yet tough nylon sleeving.
The finer diameter probes, although generally more delicate, can be used with some naso-gastric tubes: the tip of the n.g. tube is removed to allow an end viewing probe to protrude for measurement.
The standard length for all endoscopic probes is three metres. Longer lengths can be supplied and are particularly useful for larger animals (e.g. horses)
DP6b
Endoscopic end delivery probe with a reduced fibre separation for shallower measurements
Low profile designs are either used where access is difficult (e.g. oral mucosa) or to reduce application pressure if the probe is to be covered by bandages. Various designs are available, including the titanium disc probe and the near flat silicon probe.
