Quantitative transcutaneous measurements of blood flow in carotid artery by means of pulse and continuous wave Doppler methods

Borodziński, K; Filipczyński, I.; Nowicki, Andrzej; Powałowski, T.

doi:10.1016/0301-5629(76)90036-3

Cited by 25 publications

(3 citation statements)

References 2 publications

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“…Our results in CCBF are very close to those reported by Olson (325 cm 3 • min '), 24 Borodzinsky ( 397 min -1 ) 13 and Keller (300 to 480 cm 3 • min -1 )' 4 who used similar range-gated Doppler technique. The system design differed by the angle between the ultrasonic beam and the vessel axis.…”

Section: Ccbfsupporting

confidence: 79%

Evaluation of human hemispheric blood flow based on non invasive carotid blood flow measurements using the range-gated Doppler technique.

Payen¹,

Lévy²,

Menegalli³

et al. 1982

Stroke

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SUMMARY Common carotid blood flow (CCBF) was measured in 11 anesthetised patients without extracranial arterial disease (nine acute subarachnoid haemorrhages and two cases of head injury). The range-gated Doppler flowmeter with an adjustable range-gated time system and a double transducer probe was used to determine diameter, blood velocity, and blood flow of the common carotid artery. Values were, respectively, 5.9 ± 1.1 mm, 13.8 ± 6.1 cm l33 Xenon inhalation technique) in 30 subjects with normal arterial flow conditions. Fairly high correlation coefficients were found between rCBF values and end diastolic velocities in internal carotid (r = 0.88) and in common carotid (r = 0.71).Previously reported results obtained by using continuous wave Doppler methods could not measure blood flow rates (cm 3 • min') but only blood flow velocity (cm • sec -1 ) because a continuous wave system cannot measure the arterial diameter and the mean cross sectional velocity. Prior studies with a range-gated technique measured blood flow rates in radial, 10 brachial," and common carotid 1214 arteries. The latter studies did not compare the results to the cerebral blood flow. The purpose of this paper is to describe a range-gated Doppler blood flowmetry technique and to

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Section: Ccbfsupporting

confidence: 79%

Evaluation of human hemispheric blood flow based on non invasive carotid blood flow measurements using the range-gated Doppler technique.

Payen¹,

Lévy²,

Menegalli³

et al. 1982

Stroke

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show abstract

“…This value is in the same range as those derived from cerebral blood flow measurements by other methods [20,21], thus refuting a relevant change of diameter of internal carotid artery with hypercapnia or hypocapnia. For these reasons we supposed that changes in carotid internal Vma would reflect changes in cerebral blood flow approximately, assuming a fairly constant flow profile [3,5,9,10,19]. Moreover, it is a physiological principle that peripheral tissue perfusion is regulated by the contractile arterioles, which are located anatomically behind the site of Doppler measurement.…”

Section: Discussionmentioning

confidence: 99%

Failure of autoregulation of cerebral blood flow in neonates studied by pulsed Doppler ultrasound of the internal carotid artery

Jorch

1987

Eur J Pediatr

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To reveal the influence of therapeutically induced changes of arterial blood pressure on cerebral circulation, pulsed Doppler measurements of blood velocity in the right internal carotid artery were performed in 23 neonates. A positive correlation between mean arterial blood pressure and time-averaged maximum blood velocity (change more than 0.5%/torr) could be noticed in 16 infants. These infants were supposed to have loss of autoregulation. The main characteristics in this non-autoregulating group were: gestational age less than 31 weeks, birth weight less than 1501 g and mean carotid blood velocity less than 20 cm/s. In accordance with animal experiments we assume that autoregulation does not work below a definite lower limit of brain perfusion, which is reflected by carotid blood velocity in our study. Patients below/equal 1500 g or 30 gestational weeks very often do not exceed this limit and thus do not reach the "range of autoregulation".

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“…Στις περιπτώσεις αυτές συνήθως γίνεται η θεώρηση ότι το αγγείο έχει κυκλική διατοµή και ότι χωρίζοντας την επιφάνεια της εγκάρσιας τοµής στα δύο, το κάθε τµήµα έχει την δική του αξονική συµµετρία µε τιµές ταχυτήτων αυτές του αντιστοίχου τµήµατος της ευθείας. Η αρχή αυτή έχει χρησιµοποιηθεί σε αρκετές µελέτες που χρησιµοποίησαν διάφορα όργανα, όπως Single gate (Histand, Miller et al 1973) και Multi gate Doppler (Borodzinski, Filipczynski et al 1976) καθώς και Color M-mode (Juul, Slordahl et al 1991;Picot and Embree 1994). Μια παραλλαγή της µεθόδου αυτής εξετάζει το παρόν κεφάλαιο της διατριβής χρησιµοποιώντας το color M-mode.…”

Section: μονοδιάστατο προφίλ ταχύτηταςunclassified

Μελέτη Του Τοπικού Αιμοδυναμικού Παράγοντα Στις Αρτηριοφλεβικές Αναστομώσεις

Manos¹,

Μάνος²

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Quantitative transcutaneous measurements of blood flow in carotid artery by means of pulse and continuous wave Doppler methods

Cited by 25 publications

References 2 publications

Evaluation of human hemispheric blood flow based on non invasive carotid blood flow measurements using the range-gated Doppler technique.

Evaluation of human hemispheric blood flow based on non invasive carotid blood flow measurements using the range-gated Doppler technique.

Failure of autoregulation of cerebral blood flow in neonates studied by pulsed Doppler ultrasound of the internal carotid artery

Μελέτη Του Τοπικού Αιμοδυναμικού Παράγοντα Στις Αρτηριοφλεβικές Αναστομώσεις

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