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Correlation Between Monitoring Renal Hemodynamics by Esophageal Ultrasound and Acute Kidney Injury After Heart Surgery

4. januar 2019 opdateret af: Jin Dong Liu, Xuzhou Medical University

Correlation Between Monitoring Renal Hemodynamics by Esophageal Ultrasound and Acute Kidney Injury After Heart Surgery.

Acute kidney injury (AKI) is a common complication of cardiac surgery, which seriously affects the postoperative complication rate and mortality of patients.Acute kidney injury occurs in 5-30% of patients after cardiac surgery, but severe acute kidney injury requiring dialysis is relatively rare.At present, the diagnosis of AKI is based on serum creatinine (Scr) or urine volume. However, the changes of serum creatinine value have hysteresis, and the increase of serum creatinine level lags behind kidney injury for 48 ~ 72 h.Some drugs can also affect creatinine levels.Urine volume is also affected by many factors.Due to the lack of sensitivity and specificity of SCr, it is very important to find and adopt new early AKI markers.Kidney is an important metabolic organ of human body. Different from cerebrovascular system, kidney lacks automatic regulation ability and is easily affected by perfusion flow.Previous experiments have shown that placing a multi-plane esophageal probe into the human stomach through the esophagus can monitor the changes of left renal blood flow before, during and after cardiovascular surgery extracorporeal circulation, and has good repeatability, which may become an effective means to monitor renal blood flow during cardiovascular surgery.

In conclusion, this study intends to use esophageal ultrasound as a means to monitor renal blood flow, observe the changes of intraoperative renal hemodynamic indexes, and use KDIGO ( Kidney Disease:Improving Global Outcomes)as the standard of renal injury to explore the correlation between intraoperative hemodynamic changes and postoperative AKI, providing a new perspective for the pathophysiological study of AKI after cardiopulmonary bypass.

Studieoversigt

Status

Ukendt

Betingelser

Detaljeret beskrivelse

The mechanism of acute kidney injury after CPB has not been fully elucidated, and current studies suggest that the main mechanisms are as follows:

(1) endogenous/exogenous nephrotoxic substances;(2) metabolic factors: mainly reflected in the preoperative status of patients, such as obesity, low body weight, etc.;(3) hemodynamic factors: hemodynamic instability is an important mechanism for further renal injury process such as ischemia reperfusion, which is mainly reflected in: a.preoperative and postoperative hypotension: cardiogenic shock caused by cardiac insufficiency and low cardiac displacement;Non-cardiogenic shock (vasoactive drugs/allergies/postoperative bleeding);b. hemodynamic instability of intraoperative intervention: deep anesthesia, intraoperative blood loss, CPB-related intraoperative low perfusion (long CPB time, low circulation flow, low mean arterial pressure in CPB), embolic release (atherosclerotic emboli/air emboli), aorta and distal arteriotomy;(4) neurohumoral system factors: hormones such as epinephrine, norepinephrine, renin and thyroxine change to varying degrees during cardiac surgery and CPB, thus affecting the body state and systemic blood vessels;(5) inflammation and oxidative stress.

Kidney is an important metabolic organ of human body. Different from cerebrovascular system, kidney lacks automatic regulation ability and is easily affected by perfusion flow.For patients at high risk of postoperative acute kidney injury, appropriate intraoperative perfusion may reduce the incidence of postoperative acute kidney injury.

Esophageal ultrasound was used as a means of monitoring renal blood flow to observe the changes in intraoperative renal hemodynamic indexes. Meanwhile, KDIGO was used as the standard for renal injury. AKI was divided into two groups according to whether postoperative AKI occurred, and the correlation between intraoperative hemodynamic changes and postoperative AKI in the two groups was discussed.It provides new ideas for the early diagnosis of postoperative acute kidney injury.

Undersøgelsestype

Observationel

Tilmelding (Forventet)

60

Kontakter og lokationer

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Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

18 år til 70 år (Voksen, Ældre voksen)

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Alle

Prøveudtagningsmetode

Sandsynlighedsprøve

Studiebefolkning

60 patients undergoing elective cardiac surgery in the Affiliated Hospital of Xuzhou Medical University.

Beskrivelse

Inclusion Criteria:

  • Aged between 18 and 70;
  • Elective cardiopulmonary bypass for patients undergoing cardiac surgery

Exclusion Criteria:

  • Acute myocardial infarction surgery within 7 days
  • Emergency surgery
  • Known renal artery stenosis, renal malformation;Renal failure
  • Congenital esophageal malformation
  • Patients with previous history of stomach and esophagus should avoid intraoperative esophageal ultrasound examination
  • Existing acute kidney injury, kidney transplantation, chronic kidney disease and glomerular filtration rate less than 30 ml/min,
  • Pregnancy

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
AUC(RI)
Tidsramme: RI monitored 30 minutes after cardiopulmonary bypass termination
ROC curve（receiver operating characteristic curve）will be drawn according to the incidence of renal resistance index (RI) monitored by TEE and the incidence of postoperative AKI in patients, and AUC value(Area Under Curve) will be statistically analyzed.
RI monitored 30 minutes after cardiopulmonary bypass termination
AUC(PI)
Tidsramme: PI monitored 30 minutes after cardiopulmonary bypass termination
ROC curve will be drawn according to the incidence of renal pulsatility index (PI) monitored by TEE and the incidence of postoperative AKI in patients, and AUC value will be statistically analyzed.
PI monitored 30 minutes after cardiopulmonary bypass termination

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Changes in biomarkers
Tidsramme: Before surgery and at 4 hours, 12 hours, and 24 hours after surgery
Analysis of insulin-like growth factor-binding protein 7 (IGFBP7) and tissue inhibitor of metalloproteinases-2 (TIMP-2) concentrations (both induction factors for G1 cell cycle arrest are associated with acute kidney injury and are predicted as biomarkers).
Before surgery and at 4 hours, 12 hours, and 24 hours after surgery
Length of ICU stay
Tidsramme: an average of 2 days
All patients are routinely transferred to ICU after surgery
an average of 2 days
Length of hospital stay
Tidsramme: an average of 10 days
All patients are routinely transferred to ICU after surgery
an average of 10 days
Use of renal replacement therapy
Tidsramme: Until 3 months after discharge
The use of postoperative renal replacement therapy depends on the diagnosis and treatment of ICU staff.
Until 3 months after discharge
Survival rate
Tidsramme: At 1, 7 and 30 days after discharge
Record the survival rate after hospital discharged.
At 1, 7 and 30 days after discharge

Samarbejdspartnere og efterforskere

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Sponsor

Xuzhou Medical University

Efterforskere

  • Studieleder: Jin Dong Liu, M.S, The Affiliated Hospital of Xuzhou Medical University

Publikationer og nyttige links

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Generelle publikationer

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Forventet)

2. januar 2019

Primær færdiggørelse (Forventet)

30. august 2019

Studieafslutning (Forventet)

30. september 2019

Datoer for studieregistrering

Først indsendt

1. januar 2019

Først indsendt, der opfyldte QC-kriterier

4. januar 2019

Først opslået (Faktiske)

9. januar 2019

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

9. januar 2019

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

4. januar 2019

Sidst verificeret

1. december 2018

Mere information

Begreber relateret til denne undersøgelse

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • XYFY-2018-0008

Plan for individuelle deltagerdata (IPD)

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UBESLUTET

IPD-planbeskrivelse

Individual Participant Data(IPD) will be available when this trial is finished and the article have been published.

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