Doppler flow meter

Manufactured by ADInstruments

Sourced in United States

The Doppler flow meter is a lab equipment device that measures the velocity of fluid flow using the Doppler effect. It works by transmitting ultrasound waves into the fluid and analyzing the reflected signals to determine the flow rate. The core function of the Doppler flow meter is to provide accurate measurements of fluid flow in various laboratory settings.

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Lab products found in correlation

Powerlab 16sp, by ADInstruments (2 mentions)

2 protocols using doppler flow meter

Measuring Renal Vascular Conductance

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A midline laparotomy was carried out in order to isolate the left renal artery, and a miniaturized pulsed Doppler flow probe (0.8 mm in diameter, Iowa Doppler Products, Iowa City, IA, United States) was placed around this artery for indirect measurement of the blood flow and renal conductance (RC). The probe was connected to a Doppler flow meter (Department of Bioengineering, The University of Iowa, Iowa City, IA, United States), and the amplified signal was digitalized in a data acquisition system (PowerLab 16 SP, AD Instruments, Castle Hill, AU). Additional details about the Doppler technique, including the readability of this method for estimation of the blood velocity, were previously described by Haywood et al. (1981) . Relative renal vascular conductance was calculated as the ratio of Doppler shift (kHz) and mean arterial pressure (MAP, mmHg). The data were presented as percent change from the baseline [(final conductance–initial conductance)/initial conductance] × 100.

Lamy G.B., Cafarchio E.M., do Vale B., Antonio B.B., Venancio D.P., de Souza J.S., Maciel R.M., Giannocco G., Aronsson P, & Sato M.A. (2021). Lateral Preoptic Area Neurons Activated by Angiotensin-(1–7) Increase Intravesical Pressure: A Novel Feature in Central Micturition Control. Frontiers in Physiology, 12, 682711.

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Miniaturized Pulsed Doppler Flow Probe Protocol

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Rats underwent a midline laparotomy for placement of a miniaturized pulsed Doppler flow probe (0.8 mm in diameter, Iowa Doppler Products, Iowa City, IA, United States) around the left renal artery for indirect measurement of the blood flow. The probe was connected to a Doppler flowmeter (Department of Bioengineering, The University of Iowa, Iowa City, IA, United States), and the amplified signal was digitalized in a data acquisition system (PowerLab 16 SP, AD Instruments, Castle Hill, AU). Details about the readability of this method for estimation of the blood velocity and regarding the Doppler technique have been previously described by Haywood et al. (1981) (link). Relative renal vascular conductance was calculated as the ratio of Doppler shift (kHz) and MAP (mmHg). Results were presented as percent change from the baseline [(final conductance − initial conductance)/initial conductance × 100].

Lamy G.B., Cafarchio E.M., do Vale B., Antonio B.B., Venancio D.P., de Souza J.S., Maciel R.M., Giannocco G., Silva Neto A.F., Oyama L.M., Aronsson P, & Sato M.A. (2022). Unveiling the Angiotensin-(1–7) Actions on the Urinary Bladder in Female Rats. Frontiers in Physiology, 13, 920636.

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