This Article Résumé de cet Article Full Text Full Text (PDF) Submit a scholarly reply Alert me when this article is cited Alert me when eLetters are posted Alert me if a correction is posted Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Nishiyama, T. Search for Related Content PubMed PubMed Citation Articles by Nishiyama, T.

Pulse oximeters demonstrate different responses during hypothermia and changes in perfusion

[Les sphygmo-oxymètres affichent des réponses différentes pendant l’hypothermie et les changements de perfusion]

From the Department of Anesthesiology, Faculty of Medicine, The University of Tokyo, Tokyo, Japan.

Address correspondence to: Dr. Tomoki Nishiyama, 3-2-6-603, Kawaguchi, Kawaguchi-shi, Saitama, 332-0015, Japan. Phone: 81-3-5800-8668; Fax: 81-3-5800-9655; E-mail: nishit-tky{at}umin.ac.jp

Purpose: Several new pulse oximeters using updated algorithms are marketed as being resistant to motion and hypoperfusion. The purpose of this study was to compare the performance of three pulse oximeters under conditions of hypothermia and altered perfusion.

Methods: Ten male volunteers were enrolled in this study after Institutional approval and obtaining informed consent. The probe of the Dolphin 2100, Nellcor N-595, or Masimo SET radical version 4.2 was attached to the left index finger. Time from ‘power on’ to acquire the pulse wave and oxygen saturation (SpO₂), time from the application of air tourniquet with 250 mmHg on the upper arm to loss of pulse wave and SpO₂, and time from the release of the tourniquet to acquire the pulse wave and SpO₂ were measured. Then, the patient’s left hand and arm were cooled gradually to 27°C dermal temperature in a room at 19°C. The temperatures at loss of the pulse wave and SpO₂ were recorded.

Results: The Nellcor N-595 was the slowest to detect SpO₂ and pulse wave at ‘power on’. The Masimo SET showed pulse wave and SpO₂ longer than the other two monitors after ‘tourniquet on’. The Nellcor N-595 was the fastest to show pulse wave and SpO₂ following tourniquet release.

Conclusion: The Masimo SET was the slowest to respond to the changes in perfusion, and the Nellcor N-595 responded the fastest. However, the Nellcor N-595 was the slowest to show SpO₂ and pulse wave at ‘power on’.

This article has been cited by other articles:

				P. B. Batchelder and D. M. Raley Maximizing the Laboratory Setting for Testing Devices and Understanding Statistical Output in Pulse Oximetry Anesth. Analg., December 1, 2007; 105(6S_Suppl): S85 - S94. [Abstract] [Full Text] [PDF]