Norepinephrine inhibits the pelvic pressure increase in response to flow perfusion

The Journal of Urology
Uffe HolstJ Mortensen

Abstract

We evaluated the effects of norepinephrine on transport pressures in the normal upper urinary tract of the pig during increasing perfusion rates. Anesthetized Danish landrace Yorkshire pigs weighing 38 to 40 kg were studied. Transparenchymally 2, 6Fr catheters were introduced into the left renal pelvis for pressure measurements and perfusion, respectively. An ultrasonic flow probe was inserted around the left renal artery to record blood flow. A 10Fr catheter was placed transurethrally for bladder drainage and the bladder was maintained empty during the entire study. In the 5 group 1 pigs the pelvic pressure increase was examined at increasing perfusion rates of the renal pelvis (2, 4, 6, 8, 10 and 15 ml per minute) in response to endoluminal administration of increasing concentrations of norepinephrine (0, 5, 50 and 100 microg/ml) in saline. In the 5 group 2 pigs the pressure flow study was also done 4 times per animal using isotonic saline. Endoluminal norepinephrine had a dose dependent effect on the pressure flow relationship. Perfusion with 5 and 50 microg/ml norepinephrine caused a delayed increase and a decrease in pelvic pressure in response to increasing flow rates, whereas perfusion with 100 microg/ml norepinephrine s...Continue Reading

References

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Citations

Nov 12, 2015·Current Opinion in Urology·Palle J S OstherHelene U Jung
Jun 20, 2018·World Journal of Urology·Theodoros TokasUNKNOWN Training and Research in Urological Surgery and Technology (T.R.U.S.T.)-Group
Nov 21, 2017·Urolithiasis·Palle J S Osther

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