Agreement of the Nexfin™ Monitor With Non-invasive Blood Pressure Measurement

Agreement of the Nexfin™ Non-invasive Cardiac Output Monitor With Non-invasive Blood Pressure Measurement in Patients Undergoing Cesarean Delivery Under Spinal Anesthesia: a Pilot Observational Study

Currently, BP is measured using an inflatable cuff wrapped around the patient's upper arm. This can be set to inflate every minute, but measurement may fail due to patient movement or shivering. Failed measurement occurs in up to 38% of patients.

This study aims to determine how the Nexfin device - which measures BP using a cuff wrapped around a finger - compares to standard BP measurement.

This study aims to determine how the Nexfin device - which measures BP using a cuff wrapped around a finger - compares to standard BP measurement.

Inclusion Criteria:

• Healthy female pregnant patients
• ≥19 years old
• Undergoing elective Cesarean section under spinal or combined spinal-epidural anesthesia

Exclusion Criteria:

• Contraindication to wearing Nexfin cuff (upper limb vascular disease, amputated digits)
• Obesity (BMI > 38 kg/m2)
• Use of arterial line for BP measurement
• Inability to read and understand English