Intraoperative Goal-directed Blood Pressure and Dexmedetomidine on Outcomes

NCT ID: NCT03933306

Last Updated: 2025-07-18

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

PHASE4

Total Enrollment

496 participants

Study Classification

INTERVENTIONAL

Study Start Date

2019-05-20

Study Completion Date

2024-05-30

Brief Summary

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Perioperative organ injuriy remain an important threat to patients undergoing major surgeries. Intraoperative hypotension is associated with an increase in postoperative morbidity and mortality. Whereas individualized intraoperative blood pressure management is likely to decrease the incidence of postoperative organ injury when compared with standard blood pressure management strategy. Dexmedetomidine, a highly selective alpha2 adrenergic agonist, has been shown to provide organ protective effects. This study aims to investigate the impact of intraoperative goal-directed blood pressure management and dexmedetomidine infusion on incidence of postoperative organ injury in high-risk patients undergoing major surgery.

Detailed Description

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The number of patients undergoing surgeries is increasing worldwide. However, some patients develop complications or even die after surgery. Perioperative organ injury is the leading cause of the unfavorable outcomes.

Hypotension is not uncommon during major surgery and is highly responsible for the inadequate perfusion and organ injury. A recent study showed that individualized blood pressure management decreases the incidence of postoperative organ injury when compared with standard blood pressure management strategy.

Dexmedetomidine is a highly selective alpha2 adrenergic agonist. Previous studies showed that dexmedetomidine provides organ protection in various conditions. In a recent meta-analysis, perioperative dexmedetomidine reduceds the occurrence of postoperative delirium. However, whether it can reduce postoperative complications remains inconclusive.

This study aims to investigate the impact of intraoperative goal-directed blood pressure management and dexmedetomidine infusion on the incidence of postoperative organ injury in high-risk patients undergoing major abdominal surgery.

Conditions

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Blood Pressure Dexmedetomidine High-risk Patients Abdominal Surgery Postoperative Complications

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

FACTORIAL

This is a 2x2 factorial trial
Primary Study Purpose

PREVENTION

Blinding Strategy

TRIPLE

Participants Investigators Outcome Assessors
For dexmedetomidine infusion, all the participants, care providers, investigators, outcomes assessors are masked. For blood pressure management, care providers, namely anesthesiologists, are not masked.

Study Groups

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Placebo+routine blood pressure management

Placebo (normal saline) is administered during anesthesia. Blood pressure is managed according to routine practice.

Group Type PLACEBO_COMPARATOR

Placebo

Intervention Type DRUG

Loading dose placebo administered before anesthesia induction, followed by a continuous infusion until 1 hour before the end of surgery.

Routine blood pressure management

Intervention Type OTHER

Blood pressure is maintained according to routine practice, i.e., systolic blood pressure \> 90 mmHg or within ±30% of baseline within intermittent ephedrine or phenylephrine.

Dexmedetomidine+routine blood pressure management

Dexmedetomidine is administered during anesthesia (0.6 mcg/kg for 10 min, then 0.5 mcg/kg/h). Blood pressure is managed according to routine practice.

Group Type EXPERIMENTAL

Dexmedetomidine

Intervention Type DRUG

Loading dose dexmedetomidine (0.6 mcg/kg for 10 min) administered before anesthesia induction, followed by a continuous infusion (0.5 mcg/kg/h) until 1 hour before the end of surgery.

Routine blood pressure management

Intervention Type OTHER

Blood pressure is maintained according to routine practice, i.e., systolic blood pressure \> 90 mmHg or within ±30% of baseline within intermittent ephedrine or phenylephrine.

Placebo+goal-directed blood pressure management

Placebo (normal saline) is administered during anesthesia. Blood pressure is maintained within ±10% of baseline with noradrenaline infusion and fluid management.

Group Type EXPERIMENTAL

Placebo

Intervention Type DRUG

Loading dose placebo administered before anesthesia induction, followed by a continuous infusion until 1 hour before the end of surgery.

Goal-directed blood pressure management

Intervention Type OTHER

Blood pressure is maintained within ±10% of baseline with noradrenaline infusion and fluid management.

Dexmedetomidine+goal-directed blood pressure management

Dexmedetomidine is administered during anesthesia (0.6 mcg/kg for 10 min, then 0.5 mcg/kg/h). Blood pressure is maintained within ±10% of baseline with noradrenaline infusion and fluid management.

Group Type EXPERIMENTAL

Dexmedetomidine

Intervention Type DRUG

Loading dose dexmedetomidine (0.6 mcg/kg for 10 min) administered before anesthesia induction, followed by a continuous infusion (0.5 mcg/kg/h) until 1 hour before the end of surgery.

Goal-directed blood pressure management

Intervention Type OTHER

Blood pressure is maintained within ±10% of baseline with noradrenaline infusion and fluid management.

Interventions

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Dexmedetomidine

Loading dose dexmedetomidine (0.6 mcg/kg for 10 min) administered before anesthesia induction, followed by a continuous infusion (0.5 mcg/kg/h) until 1 hour before the end of surgery.

Intervention Type DRUG

Placebo

Loading dose placebo administered before anesthesia induction, followed by a continuous infusion until 1 hour before the end of surgery.

Intervention Type DRUG

Goal-directed blood pressure management

Blood pressure is maintained within ±10% of baseline with noradrenaline infusion and fluid management.

Intervention Type OTHER

Routine blood pressure management

Blood pressure is maintained according to routine practice, i.e., systolic blood pressure \> 90 mmHg or within ±30% of baseline within intermittent ephedrine or phenylephrine.

Intervention Type OTHER

Other Intervention Names

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Dexmedetomidine hydrochloride injection Normal saline

Eligibility Criteria

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Inclusion Criteria

* Age 50 years or older;
* Scheduled to undergo abdominal surgery under general anesthesia with an expected duration of 2 hours or longer;
* With a preoperative acute kidney injury risk index of class III or higher (meet 4 or more of the following factors: age ≥56 years, male sex, active congestive heart failure, ascites, hypertension, emergency surgery, intraperitoneal surgery, mild or moderate renal insuffificiency, diabetes mellitus requiring oral or insulin therapy).

Exclusion Criteria

* Severe uncontrolled hypertension (SBP\>180 mmHg or diastolic blood pressure \>110 mmHg);
* Acute or decompensated heart failure, acute coronary syndrome, or stroke within 1 month;
* Severe bradycardia (heart rate \< 50 bpm), sick sinus syndrome, second-degree or higher atrioventricular block without pacemaker, atrial fibrillation, or frequent premature beats;
* Severe hepatic dysfunction (Child-Pugh C) or chronic kidney disease (glomerular filtration rate \<30 ml/min/1.73 m2 or dependent on renal replacement therapy) ;
* Pregnant;
* Receiving dexmedetomidine or norepinephrine infusion before surgery;
* Do not provide written informed consent.
Minimum Eligible Age

50 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Peking University First Hospital

OTHER

Sponsor Role lead

Responsible Party

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Dong-Xin Wang

Professor and Chairman, Department of Anaesthesiology and Critical Care Medicine

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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Dong-Xin Wang, MD, PhD

Role: PRINCIPAL_INVESTIGATOR

Peking University First Hospital

Locations

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Peking University First Hospital

Beijing, Beijing Municipality, China

Site Status

Countries

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China

References

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Other Identifiers

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2019-73

Identifier Type: -

Identifier Source: org_study_id

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