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Splanchnic Perfusion Monitoring in Septic Shock Using Doppler Ultrasound

7. Juli 2026 aktualisiert von: Esraa Tarek Mahmoud Ahmed, Assiut University

Splanchnic Perfusion Monitoring Using Doppler Ultrasound in Septic Shock Patients: Correlation With Lactate Clearance, Organ Dysfunction, and Enteral Feeding Intolerance

evaluation whether splanchnic Doppler ultrasound indices (SMA resistive index, portal vein pulsatility fraction, hepatic artery resistive index/flow parameters) can:

Reflect regional tissue perfusion in septic shock, as correlated with lactate clearance.
Associate with organ dysfunction severity and progression (SOFA dynamics).
Predict enteral feeding intolerance in ICU patients receiving enteral nutrition

Studienübersicht

Status

Noch keine Rekrutierung

Bedingungen

Septischer Schock

Detaillierte Beschreibung

Sepsis is a life-threatening condition caused by a dysregulated host response to infection, leading to severe organ dysfunction. Globally, sepsis accounts for approximately 48.9 million cases and 11 million deaths annually.

A central clinical challenge is hemodynamic incoherence, where systemic targets (e.g., mean arterial pressure [MAP]) may improve while regional tissue perfusion remains impaired. Conventional systemic markers, including blood lactate clearance and central venous oxygen saturation, reflect global metabolic status and may lag behind microvascular dysfunction within specific organ beds.

The hepatosplanchnic circulation is particularly vulnerable during septic shock and may contribute to progression toward multiple organ failure through a sustained inflammatory cascade. The splanchnic region has been described as the "motor" of multiple organ failure and the "canary" of the body.

Bedside Doppler ultrasound has emerged as a noninvasive tool to assess regional perfusion. Doppler-derived indices such as the resistive index (and related parameters including portal pulsatility fraction) may detect early hemodynamic impairment at the organ-bed level before systemic biomarkers change.

Accordingly, improved bedside perfusion monitoring especially for the splanchnic circulation-may help optimize resuscitation strategy and nutritional management, and may clarify relationships between regional perfusion, organ dysfunction, and enteral feeding tolerance.

Studientyp

Beobachtungs

Einschreibung (Geschätzt)

Kontakte und Standorte

Dieser Abschnitt enthält die Kontaktdaten derjenigen, die die Studie durchführen, und Informationen darüber, wo diese Studie durchgeführt wird.

Studienkontakt

Name: Esraa Tarek Ahmed
Telefonnummer: +201004590619
E-Mail: esraatarek062@Gmail.com

Teilnahmekriterien

Forscher suchen nach Personen, die einer bestimmten Beschreibung entsprechen, die als Auswahlkriterien bezeichnet werden. Einige Beispiele für diese Kriterien sind der allgemeine Gesundheitszustand einer Person oder frühere Behandlungen.

Zulassungskriterien

Studienberechtigtes Alter

Erwachsene
Älterer Erwachsener

Akzeptiert gesunde Freiwillige

N/A

Probenahmeverfahren

Nicht-Wahrscheinlichkeitsprobe

Studienpopulation

Adult patients (≥18 years) admitted to the ICU with septic shock according to Sepsis-3 criteria, who are eligible for enrollment and undergo splanchnic Doppler ultrasound evaluation 24 hours after ICU admission.

Beschreibung

Inclusion Criteria:

1. Adult patients (≥18 years). 2. ICU admission with septic shock (Sepsis-3 definitions).

Exclusion Criteria:

- 1. Advanced chronic liver disease. 2. Portal vein thrombosis. 3. Mesenteric ischemia (or clinical suspicion strongly suggesting it). 4. Severe right-sided heart failure. 5. Pregnancy. 6. Morbid obesity or any condition causing poor/unsafe ultrasound acoustic window.

7. Intra-abdominal conditions preventing adequate Doppler assessment. 8. Limitation of care / do-not-resuscitate orders. 9. Pre-existing major gastrointestinal bleeding/obstruction if that is relevant to enteral feeding intolerance outcomes in your ICU.

Studienplan

Dieser Abschnitt enthält Einzelheiten zum Studienplan, einschließlich des Studiendesigns und der Messung der Studieninhalte.

Wie ist die Studie aufgebaut?

Designdetails

Was misst die Studie?

Primäre Ergebnismessungen

Ergebnis Maßnahme	Maßnahmenbeschreibung	Zeitfenster
Association between portal vein PF and SOFA progression Zeitfenster: baseline through 72 hours after ICU admission	To evaluate the association between portal vein pulsatility fraction and progression in the Sequential Organ Failure Assessment (SOFA) score, defined as the difference between the baseline SOFA score and the SOFA score at 24 hours, or the peak SOFA score within 72 hours after ICU admission. The SOFA score ranges from 0 to 24, with higher scores indicating more severe organ dysfunction and a worse clinical outcome.	baseline through 72 hours after ICU admission
Lactate clearance (%) at 6 and 24 hours after ICU admission Zeitfenster: baseline through 24 hours after ICU admission	Lactate clearance, expressed as a percentage (%), calculated from serial arterial blood lactate concentrations measured at baseline, 6 hours, and 24 hours after ICU admission. Blood lactate concentration will be measured using standard arterial blood gas/laboratory analysis. The correlation between the baseline superior mesenteric artery (SMA) resistive index measured by Doppler ultrasound and lactate clearance at 6 and 24 hours will be evaluated.	baseline through 24 hours after ICU admission
Incidence of enteral feeding intolerance within 72 hours after ICU admission Zeitfenster: within 72 hours after ICU admission	Incidence (%) of enteral feeding intolerance occurring within 72 hours after ICU admission, assessed according to predefined clinical criteria (e.g., vomiting, abdominal distension, or interruption of enteral nutrition due to intolerance). Superior mesenteric artery resistive index (SMA RI), portal vein pulsatility fraction (PVPF), and hepatic artery resistive index (HARI), measured by Doppler ultrasound at 24 hours after ICU admission, will be correlated with the occurrence of enteral feeding intolerance.	within 72 hours after ICU admission

Sekundäre Ergebnismessungen

Ergebnis Maßnahme	Maßnahmenbeschreibung	Zeitfenster
Length of ICU Stay Zeitfenster: From ICU admission until ICU discharge	Length of ICU stay, measured in days from ICU admission until ICU discharge. Splanchnic Doppler ultrasound parameters, including superior mesenteric artery resistive index (SMA RI), portal vein pulsatility fraction (PVPF), and hepatic artery resistive index (HARI), measured 24 hours after ICU admission, will be evaluated for their predictive value for ICU length of stay.	From ICU admission until ICU discharge
Duration of Vasopressor Therapy Zeitfenster: From ICU admission until discontinuation of vasopressor therapy	Duration of vasopressor therapy, measured in days from ICU admission until permanent discontinuation of vasopressor support. Splanchnic Doppler ultrasound parameters, including superior mesenteric artery resistive index (SMA RI), portal vein pulsatility fraction (PVPF), and hepatic artery resistive index (HARI), measured 24 hours after ICU admission, will be evaluated for their predictive value for vasopressor therapy duration.	From ICU admission until discontinuation of vasopressor therapy
ICU Mortality Zeitfenster: From ICU admission until ICU discharge	ICU mortality, reported as the percentage of participants who die during the ICU stay. Splanchnic Doppler ultrasound parameters, including superior mesenteric artery resistive index (SMA RI), portal vein pulsatility fraction (PVPF), and hepatic artery resistive index (HARI), measured 24 hours after ICU admission, will be evaluated for their predictive value for ICU mortality.	From ICU admission until ICU discharge

Mitarbeiter und Ermittler

Hier finden Sie Personen und Organisationen, die an dieser Studie beteiligt sind.

Sponsor

Assiut University

Publikationen und hilfreiche Links

Die Bereitstellung dieser Publikationen erfolgt freiwillig durch die für die Eingabe von Informationen über die Studie verantwortliche Person. Diese können sich auf alles beziehen, was mit dem Studium zu tun hat.

Allgemeine Veröffentlichungen

] Singer M, Deutschman CS, Seymour CW, Shankar-Hari M, Annane D, Bauer M, Bellomo R, Bernard GR, Chiche JD, Coopersmith CM, Hotchkiss RS. The third international consensus definitions for sepsis and septic shock (Sepsis-3). Jama. 2016 Feb 23;315(8):801-10. [2] Rudd KE, Johnson SC, Agesa KM, Shackelford KA, Tsoi D, Kievlan DR, Colombara DV, Ikuta KS, Kissoon N, Finfer S, Fleischmann-Struzek C. Global, regional, and national sepsis incidence and mortality, 1990-2017: analysis for the Global Burden of Disease Study. The Lancet. 2020 Jan 18;395(10219):200-11. [3] Markwart R, Saito H, Harder T, Tomczyk S, Cassini A, Fleischmann-Struzek C, Reichert F, Eckmanns T, Allegranzi B. Epidemiology and burden of sepsis acquired in hospitals and intensive care units: a systematic review and meta-analysis. Intensive care medicine. 2020 Aug;46(8):1536-51. [4] Ince C. Hemodynamic coherence and the rationale for monitoring the microcirculation. Critical care. 2015 Dec 18;19(Suppl 3):S8. [5] Hariri G, Joffre J, Leblanc G, Bonsey M, Lavillegrand JR, Urbina T, Guidet B, Maury E, Bakker J, Ait-Oufella H. Narrative review: clinical assessment of peripheral tissue perfusion in septic shock. Annals of intensive care. 2019 Mar 13;9(1):37. [6] Huber W, Zanner R, Schneider G, Schmid R, Lahmer T. Assessment of regional perfusion and organ function: less and non-invasive techniques. Frontiers in medicine. 2019 Mar 22;6:50. [7] Asfar P, De Backer D, Meier-Hellmann A, Radermacher P, Sakka SG. Clinical review: influence of vasoactive and other therapies on intestinal and hepatic circulations in patients with septic shock. Critical care. 2003 Jun;8(3):170. [8] Dr D. The gastrointestinal tract. The canary of the body?. JAMA. 1993;270:1247-8. [9] Tavazzi G, Spiegel R, Rola P, Price S, Corradi F, Hockstein M. Multiorgan evaluation of perfusion and congestion using ultrasound in patients with shock. European Heart Journal: Acute Cardiovascular Care. 2023 May 4;12(5):344-52. [10] Buitr

Studienaufzeichnungsdaten

Diese Daten verfolgen den Fortschritt der Übermittlung von Studienaufzeichnungen und zusammenfassenden Ergebnissen an ClinicalTrials.gov. Studienaufzeichnungen und gemeldete Ergebnisse werden von der National Library of Medicine (NLM) überprüft, um sicherzustellen, dass sie bestimmten Qualitätskontrollstandards entsprechen, bevor sie auf der öffentlichen Website veröffentlicht werden.

Haupttermine studieren

Studienbeginn (Geschätzt)

1. September 2026

Primärer Abschluss (Geschätzt)

1. September 2027

Studienabschluss (Geschätzt)

1. Oktober 2027

Studienanmeldedaten

Zuerst eingereicht

2. Juli 2026

Zuerst eingereicht, das die QC-Kriterien erfüllt hat

7. Juli 2026

Zuerst gepostet (Tatsächlich)

13. Juli 2026

Studienaufzeichnungsaktualisierungen

Letztes Update gepostet (Tatsächlich)