Evaluation of Transplant Renal Artery Blood Flow by Doppler Sound-Spectrum Analysis

Reinitz, Emanuel R.

doi:10.1001/archsurg.1983.01390040027006

Cited by 47 publications

(19 citation statements)

References 13 publications

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“…Hence, Orihashi et al reported that cerebral complications associated with selective cerebral perfusion in aortic surgeries can be predicted and evaluated by blood flow monitoring in the central retinal artery. 3 After Sampson 4 first performed arterial flow monitoring in a transplanted kidney using continuous wave Doppler monitoring in 1969, this technique has been performed widely to identify transplant rejection, [5][6][7] and has also been used to assess acute renal failure or renal transplants. [8][9][10][11] A recently developed Doppler guidewire enables Doppler measurements in the coronary arteries to be taken.…”

Section: Discussionmentioning

confidence: 99%

Novel Doppler Technique to Assess Systemic Vascular Resistance The Snuffbox Technique

Ban

Kochi

Imai

et al. 2005

Circ J

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lose monitoring of the peripheral circulation is critical for the management of intensive care unit (ICU) patients, including particularly those who have just had open-heart surgery. Although peripheral temperature monitoring of the extremities is a simple method to diagnose peripheral circulatory disturbance, it does not provide a quantitative assessment. The systemic vascular resistance (SVR) index (SVRI) is an objective and standard measure of the peripheral circulation, but calculation of SVRI requires the determination of cardiac output (CO; in L/min) through invasive examination or the use of sophisticated equipment. CO is estimated non-invasively from oxygen uptake during exercise, 1 but the calculation of SVR needs central venous pressure (CVP: in mmHg) or mean right atrial pressure measurements. 2 Therefore, the development of a quantitative method to evaluate peripheral circulatory disturbance non-invasively is important.Resistive index (RI) is a parameter that not only indicates the absolute value of blood flow velocity but also reflects changes in Doppler waveforms. In the urology field, RI is used in the evaluation of the severity of impaired blood circulation following renal transplantation and progressive nephropathy. However, RI has mainly been used for evaluating blood flow to a target organ, but not for hemodynamics. In patients with extreme hemodynamics, including those who have had open-heart surgery and following an emergency, it is very important to know the impairment of the peripheral circulation; therefore, if RI could be used simply to quantify systemic blood vessel resistance, it could be an important parameter for circulation control, based on a different perspective from that of cardiac output and oxygen saturation of mixed-venous blood. Here, we measured RI in the upper extremity arteries, examined the most effective point of measurement, and determined whether this technique allows for the quantitative evaluation of peripheral circulatory disturbance. Methods Measurements of RIAt each measurement point, a 7.5 MHz probe was positioned on the measurement surface and a target artery (simulated peripheral artery in vitro) was imaged in B mode. A site with the minimum ultrasonic incidence angle was selected in the artery on display and pulsed Doppler ultrasonography was conducted. The systolic maximum velocity (Vmax) and diastolic minimum velocity (Vmin) of the pulsed Doppler waveforms were determined and Background To explore an alternative to the systemic vascular resistance index (SVRI) for monitoring peripheral circulation in patients in the intensive care unit (ICU), the resistive index (RI) in the upper extremity arteries was measured by using surface Doppler ultrasound. Methods and ResultsThe correlation between RI and vascular resistance was assessed in vitro using a vessel phantom in a Donovan-type mock circulation system. In addition, 15 ICU patients who had undergone open-heart surgery were studied. Mean arterial pressure, central venous pressure and cardiac output were measu...

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Section: Discussionmentioning

confidence: 99%

Novel Doppler Technique to Assess Systemic Vascular Resistance The Snuffbox Technique

Ban

Kochi

Imai

et al. 2005

Circ J

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“…Plasma renin activity has little value in this type of patient, because it could be high in allograft rejection and in the presence of their own kidneys [26,33], Clinical suspicion of a functioning RAS, even without a decrease in renal function, is evident by the presence of a bruise in the allograft zone. Doppler sound spectrum analysis may offer great possibilities [28]. Morphologic confirmation of the stenosis is made with DIVAS and arteriography.…”

Section: Methodsmentioning

confidence: 99%

“…Clinically it resembles severe HT with a reduction of renal function with or without oliguria and, in the area of the graft, an arterial bruise appears. The diagnosis is suggested by angiogammagraphy and established by Doppler sound spectrum analysis [28]; morphologic confirmation is made by digi tal intravenous angiography (DIVAS) and, especially, ar teriography.…”

Section: Renal Artery Stenosis (Ras) As a Complication Of Renal Transmentioning

confidence: 99%

Renal Artery Stenosis in Transplanted Kidney: Management and Results in Six Patients

Serrallach¹,

Serrate²,

Franco³

et al. 1985

Eur Urol

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“…In the routine follow-up of kidney allografts, Duplex Doppler is widely used and permits diagnosis for vascu lar complications or blood flow velocity changes in epi sodes of renal allograft rejection [9][10][11], Also for the detection of renal artery stenosis with the Doppler method a sensitivity of 83% with a specificity of 97% is reported [12]. …”

Section: Introductionmentioning

confidence: 99%

Diagnosis of Renal Artery Occlusion by Duplex Sonography and Successful Lysis Therapy

Höbarth

Kratzik²,

Schurawitzki³

1991

Urol Int

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Evaluation of Transplant Renal Artery Blood Flow by Doppler Sound-Spectrum Analysis

Cited by 47 publications

References 13 publications

Novel Doppler Technique to Assess Systemic Vascular Resistance The Snuffbox Technique

Novel Doppler Technique to Assess Systemic Vascular Resistance The Snuffbox Technique

Renal Artery Stenosis in Transplanted Kidney: Management and Results in Six Patients

Diagnosis of Renal Artery Occlusion by Duplex Sonography and Successful Lysis Therapy

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