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Titolo:
Duplex ultrasound for assessment of superior mesenteric artery blood flow
Autore:
Perko, MJ;
Indirizzi:
Univ Copenhagen, Rigshosp, Dept Vasc Surg, Copenhagen, Denmark Univ Copenhagen Copenhagen Denmark Dept Vasc Surg, Copenhagen, Denmark Univ Copenhagen, Rigshosp, Dept Cardiothorac Surg, Copenhagen, Denmark Univ Copenhagen Copenhagen Denmark rdiothorac Surg, Copenhagen, Denmark
Titolo Testata:
EUROPEAN JOURNAL OF VASCULAR AND ENDOVASCULAR SURGERY
fascicolo: 2, volume: 21, anno: 2001,
pagine: 106 - 117
SICI:
1078-5884(200102)21:2<106:DUFAOS>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
HEAD-UP TILT; INDUCED CENTRAL HYPOVOLEMIA; DOPPLER-SHIFT WAVEFORMS; OCCLUSIVE DISEASE; PULSATILITY INDEX; PHYSIOLOGICAL INTERPRETATION; NONINVASIVE DIAGNOSIS; INTESTINAL ISCHEMIA; HEALTHY-SUBJECTS; CELIAC-DISEASE;
Keywords:
mesenteric circulation; mesenteric physiology; mesenteric surgery; ultrasonics;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
91
Recensione:
Indirizzi per estratti:
Indirizzo: Perko, MJ Univ Copenhagen, Rigshosp, Dept RT 2152, Blegdamsvej 9, Copenhagen, Denmark Univ Copenhagen Blegdamsvej 9 Copenhagen Denmark agen, Denmark
Citazione:
M.J. Perko, "Duplex ultrasound for assessment of superior mesenteric artery blood flow", EUR J VAS E, 21(2), 2001, pp. 106-117

Abstract

Duplex ultrasound (DU) is recognised as a valuable tool for the assessmentof blood flow in many vascular territories. The application of this technique to the superior mesenteric artery (SMA) has increased vapidly throughout the last decade. The purpose of this review is to collate currently available information on the utility of SMA DU, both in terms of research and clinical practice. Research investigations have revealed low intra- and interobserver variability in the estimation of Doppler variables, while reliable evaluation of B-mode dimensions requires repeated measurements. SMA blood flow velocity has been found to be dependent upon changes in central haemodynamics and in peripheral resistance, which was documented in studies with hypotension, medication and post-prandially. Food intake induces mesenteric vasorelaxation reflected by a 10-fold increase in the diastolic velocity. This feature hasbeen utilised in studies on mesenteric physiology which confirmed parasympathetic activity during hypovolaemia, and showed that exercise increases splanchnic resistance and reduces its blood flow following a 50% reduction inthe hepato-splenic and a 25% reduction in the mesenteric blood flow. Clinical studies have documented high sensitivity and specificity of DU indetection of disease in splanchnic arteries. Diastolic velocity was found to be the most accurate indicator of SMA stenosis, while an absent Doppler signal from a well visualised vessel has been found to be a reliable predictor of occlusion. The high predictive value of DU in the detection of mesenteric artery disease, together with its simplicity and non-invasiveness, suggests that DU should take precedence over arteriography in both clinical practice and laboratory investigations.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/01/20 alle ore 18:37:28