{"product_id":"doppler-model-909-24v","title":"DOPPLER MODEL 909 24V","description":"\u003cp\u003eParks Bi-Directional Dual Frequency Doppler with meters and recorder output. \u003c\/p\u003e\n\u003cp\u003eParks Medical vascular Doppler probes are used for noninvasive assessment of blood flow in peripheral arteries and veins. Different probe frequencies help you evaluate both superficial and deeper vessels in a variety of vascular exams.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eProbes in the 8–9 MHz range are suited for vessels close to the skin, such as many ankle, foot, and upper‑extremity arteries. 4 MHz probes, with a larger tip, are intended for deeper arteries and veins.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eDual‑frequency directional probes\u003cbr\u003eParks dual‑frequency directional probes combine two frequencies in one probe to support both superficial and deep vessel assessment. Typical combinations include 4 MHz with 8 or 9 MHz, allowing you to switch frequency on the same exam based on vessel depth and signal quality.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eDirectional probes provide separate audio channels for forward and reverse flow, assisting in arterial and venous flow characterization when used with standard vascular lab protocols.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eItem comes with two pencil probes: \u003cstrong\u003eone high frequency pencil prob\u003c\/strong\u003ee \u003cmeta charset=\"utf-8\"\u003e(8.0-9.9 Mhz)\u003c\/p\u003e\n\u003cp\u003eand \u003cstrong\u003eone low frequency pencil probe \u003c\/strong\u003e\u003cmeta charset=\"utf-8\"\u003e(3.9-4.2 Mhz).\u003c\/p\u003e\n\u003cp\u003eSelect high and low frequency designations below. \u003c\/p\u003e\n\u003cp\u003eCompatibility\u003cbr\u003eEach Parks probe is designed to operate at a specific frequency or pair of frequencies and must be used with a matching Parks Doppler instrument. 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