Comparison of Perfusion Index Monitoring Using a Smartwatch and a Pulse Oximeter (PIWATCH)

Czech Technical University in Prague

Status: Not yet enrolling

Conditions: Perfusion Index

Treatments: Other: Movement artifacts; Other: Physical exercise; Other: Circulation constriction; Other: Resting conditions

Study type: Interventional

Funder types: Other

Identifiers

NCT06626217

NVT_02_2024

Details and patient eligibility

About

The aim of the study is to experimentally compare measured perfusion index values between smartwatch and a medical grade pulse oximeter in healthy subjects at rest and with and without motion artifacts and during exercise.

Full description

Perfusion index (PI) is one of the many vital signs monitored to assess the clinical status of a patient. PI is determined from the pulsatile part of the plethysmographic curve, with typical values measured on the fingers ranging from 0.02% to 20%. Although PI is a relatively newly measured parameter, it has already found application in many areas of clinical medicine. For example, continuous measurement of the perfusion index has been used to monitor changes in finger blood flow after finger replantation (surgical reattachment of the finger to the patient's body). As the ability to monitor the perfusion index begins to become part of the monitored parameters of smartwatches, this new feature could be used in situations where the use of finger sensors is not appropriate. However, no comparison of perfusion index measurements between smartwatch and pulse oximeter has been made to date.

Enrollment: 50 estimated patients

Sex: All

Ages: 18+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Healthy Adult Volunteer

Exclusion criteria

• Post-traumatic upper limb conditions affecting finger or arm perfusion
• Injuries or diseases of the skin of the fingers and arm
• Any acute phase of any disease

Trial design

Primary purpose: Diagnostic

Allocation: N/A

Interventional model: Single Group Assignment

Masking: None (Open label)

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50 participants in 1 patient group

Comparison of perfusion index monitoring using a smartwatch and a pulse oximeter

Experimental group

Description:

Placing the finger pulse oximeter sensor on the left middle finger and placing the Massimo Watch W1 on the volunteer's left wrist (2 cm from the processus styloideus). Four interventions subsequently follow (Resting condition, Movement artifacts and Circulation constriction, Physical Exercise).

Treatment:

Other: Resting conditions

Other: Circulation constriction

Other: Physical exercise

Other: Movement artifacts