Agreement between non-invasive cuff and arterial line BP during anesthesia induction

Is this trial a fit for you?

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This observational study will enroll 120 patients at the Medical University of Graz to compare non-invasive oscillometric blood pressure measurements with intra-arterial BP readings during induction of general anesthesia. The aim is to quantify agreement between cuff measurements and arterial catheter readings when BP can change rapidly due to anesthesia agents, particularly in patients with vascular or heart disease or hypertension. Participants must require intra-arterial monitoring for clinical reasons and meet high-risk criteria, with measurements taken under supine positioning. The study uses standard non-invasive monitoring alongside the arterial catheter to assess concordance. Outcomes will inform whether cuff BP readings are reliable enough to guide management in this critical window.

Why it matters

Who can join: the full rules

Inclusion Criteria:

1. Intraarterial blood pressure monitoring prior to induction of anesthesia is necessary for clinical reasons
2. Surgery under general anesthesia
3. Provision of written informed consent
4. Less than a 5 mmHg difference between consecutive non-invasive oscillometric blood pressure measurements on the left and right arms
5. Supine positioning during induction of anesthesia possible and used for clinical reasons.
6. At least one of the following factors indicating high-risk of blood pressure changes during induction of anesthesia:

   1. Peripheral arterial disease
   2. Carotid artery disease
   3. Severe coronary artery disease
   4. Arterial hypertension requiring three or more antihypertensive agents

Exclusion Criteria:

1. Inability to insert the intraarterial catheter and venous catheter on the same arm (mandatory to be on the contralateral side of the non-invasive oscillometric measurement)
2. Pregnancy
3. Planned awake fiberoptic intubation
4. Previous enrollment in the study

Where it's running

• Medical University of Graz, Department of Anaesthesiology and Intensive Care Medicine
  Graz, Styria, Austria Recruiting

Study contacts

• Principal investigator: Michael Eichlseder, MD PhD — Medical University of Graz, Department of Anaesthesiology and Intensive Care Medicine
• Study coordinator: Michael Eichlseder, MD PhD
• Email: michael.eichlseder@medunigraz.at
• Phone: +43 316 385 81919

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How to take part

1. Review the eligibility criteria above with your treating physician.
2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.