Simple shift in needle placement could make blood pressure monitoring more reliable
NCT ID NCT06566456
First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This completed study tested whether placing an arterial line 1.5-2.5 cm higher than the usual wrist site reduces problems like kinking or blockage. 486 adults having elective surgery were randomly assigned to the modified or traditional site. The goal was to see if the new spot leads to more stable blood pressure readings and fewer line failures.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- What this could lead to
- If successful, this could lead to a simple change in standard practice for arterial line placement, reducing catheter problems and improving monitoring accuracy during surgery.
- What could go wrong
- This is a completed study, so results are available but not yet widely adopted. The benefit may be small or not apply to all patients or settings.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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486 people
The number who actually took part.
- Started
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Sep 2025
- Finished
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Nov 2025
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 to 75 years
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
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Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion criteria 1. Patients 18-75 years of age undergoing elective surgery who require radial artery cannulation; 2. Patients positioned in supine, lithotomy, or other face-up surgical postures; 3. American Society of Anesthesiologists (ASA) physical status classification: Grades I to III. Exclusion criteria 1. Abnormal results from the modified Allen test; 2. Patients with a history of radial artery cannulation within the past 3 months, or with infection/trauma at or adjacent to the puncture site; 3. Coagulopathy or hypercoagulable state; 4. Patients undergoing anticoagulant therapy; 5. Comorbid vascular diseases (e.g., vasculitis); 6. Patients undergoing surgical procedures involving the same anatomic region; 7. Preoperative hemodynamic instability (including patients already on vasoactive medications, or with atrial fibrillation, atrial flutter, atrioventricular block of grade II or higher, multifocal ventricular premature beats, or ventricular premature beats with R-on-T phenomenon); 8. Patients lacking legal capacity to sign informed consent.
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As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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the Sixth Affiliated Hospital, Sun Yat-sen University
Guangzhou, Guangdong, 510655, China