Continuous Versus 1-min Oscillometric Arterial BP Monitoring

Seoul National University

Status: Completed

Conditions: Anesthesia, General

Treatments: Device: 1-min interval oscillometric method; Device: arterial catheterization method

Study type: Interventional

Funder types: Other

Identifiers

NCT05792436

SPROUT-2

Details and patient eligibility

About

Hypotension is common during surgery and about one-third of hypotension occur during the period from anesthesia induction to skin incision. Therefore, monitoring blood pressure during this period is crucial.

Two methods are used for measuring blood pressure during surgery: the intermittent measurement method (oscillometric method) and the continuous measurement method (arterial catheterization method). The latter is frequently used in surgical patients who require meticulous hemodynamic management, although there is no clearly defined indication for its use. Despite the benefits of arterial catheterization, it is often delayed after induction of general anesthesia, and blood pressure is monitored intermittently using the oscillometric method.

A recent study showed that continuous arterial pressure monitoring using arterial catheterization method during the induction of general anesthesia reduced hypotension significantly compared to 2.5-min interval intermittent arterial pressure monitoring using oscillometric method. The study was conducted on patients scheduled for continuous arterial pressure monitoring during surgery and the group with continuous arterial pressure monitoring showed significantly lower incidence of hypotension during the first 15 minutes of anesthesia induction.

However, measuring blood pressure using the oscillometric method at 1-min interval, rather than 2.5-min interval, may not be significantly inferior to continuous monitoring via arterial catheterization in terms of hypotension occurrence. This study aims to compare hypotension incidence between arterial catheterization method and oscillometric method with 1-min interval during induction of anesthesia in non-cardiac surgery patients.

Enrollment: 258 patients

Sex: All

Ages: 19+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Adult patients aged 19 or older undergoing scheduled non-cardiac surgery with general anesthesia and continuous invasive arterial blood pressure monitoring via the radial artery

Exclusion criteria

• Arterial access is clinically necessary before induction of anesthesia (e.g., moderate or higher degree of aortic stenosis, moderate or higher degree of heart failure, coronary artery disease requiring revascularization, intracranial aneurysm with a significant risk of rupture, etc.)
• Emergency surgery
• American Society of Anesthesiologists (ASA) physical status 5 or 6
• Arterial access is required in a different artery other than the radial artery (e.g., the femoral artery)
• Electrocardiogram other than sinus rhythm
• Refusal to participate in the study

Trial design

Primary purpose: Prevention

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Triple Blind

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258 participants in 2 patient groups

1-min interval oscillometric method

Experimental group

Description:

1-min interval blood pressure monitoring using oscillometric method during induction of anesthesia

Treatment:

Device: 1-min interval oscillometric method

arterial catheterization method

Active Comparator group

Description:

Continuous blood pressure monitoring through arterial catheter during induction of anesthesia

Treatment:

Device: arterial catheterization method