Non-invasive Assessment of Arterial Blood Pressure and Functional Hemodynamic Parameters

An Evaluation of a New, Non-invasive Monitoring Device in Major Abdominal Surgery Patients

Cardiac output can be monitored using different invasive devices. Nexfin HD is a new, noninvasive device that uses model flow technology to measure stroke volume and thus computes cardiac output (CO). To evaluate this new device the investigators compared esophageal doppler CO to Nexfin HD CO in patients scheduled for elective abdominal surgery.

Inclusion Criteria:

• Age > 18 and < 80 years old
• Written informed consent obtained

Exclusion Criteria:

• Renal failure
• Heart failure (EF < 25%)
• Peripheral artery occlusion disease
• M. Raynaud
• Rhythms other than sinus