After surgery, it is essential that clinicians become aware of patient deterioration and respiratory abnormalities as soon as possible so as to quickly administer appropriate treatment. Challenged by frequently low clinician-to-patient ratios and the intermittent nature of many current monitoring modalities, clinicians sometimes identify deterioration when it may be too late. Masimo’s integrated oxygenation and perioperative monitoring solutions help clinicians care for post-operative patients at risk of respiratory depression and other unforeseen complications.

Noninvasive and Continuous Respiratory Rate

Noninvasive and Continuous Respiratory Rate

Masimo - Root with O3 Sedline rainbow Lite ISA Nomoline

The National Institute for Clinical Excellence (NICE) states that respiratory rate is the most sensitive marker of a deteriorating patient and the first commonly observed indication of a problem.1 In addition, the Anesthesia Patient Safety Foundation (APSF) recommends continuous oxygenation and ventilation monitoring for all patients receiving opioid-based pain medications.2 However, current methods of respiration rate monitoring may be limited by shortcomings related to accuracy and patient tolerance.3,4

rainbow Acoustic Monitoring® is a noninvasive and continuous method of monitoring respiratory rate in post-operative patients that has the benefit of higher patient compliance.5,6 A Respiratory Acoustic Sensor applied to the patient’s neck – such as the small, lightweight RAS-45 – detects acoustic signals produced by turbulent airflow in the upper airway that occurs during inhalation and exhalation. Signal processing algorithms convert the acoustic patterns into breath cycles to calculate respiratory rate, which is displayed as a continuous RRa® measurement and real-time acoustic waveform on Masimo Pulse CO-Oximeters®.

While Masimo offers capnography solutions, rainbow Acoustic Monitoring may be more appropriate for some patients.

Comprehensive Oxygenation Monitoring

Comprehensive Oxygenation Monitoring


In addition to continuous respiratory rate monitoring with RRa, Masimo offers continuous SpO2 monitoring with SET® Measure-through Motion and Low Perfusion™ pulse oximetry. Integrating both continuous measurements into a single device not only provides clinicians more information regarding a patient’s oxygenation, but also reduces the need for multiple monitors in a crowded PACU. 

Performance During Motion and Low Perfusion9

Masimo - PLM-10660A Product Information, Masimo SET, US Chart

Masimo SET® had 3% missed true alarms and 5% false alarms versus 43% and 28%, respectively, using competitor technology.9

Results shown are calculated by combining sensitivity and specificity outcomes of machine-generated and volunteer-generated motion.

Two separate studies found that Masimo SET® pulse oximeters detected approximately 10 times more true events than other “Next Generation” pulse oximeters studied.7,8 In another study comparing the ability of three pulse oximetry technologies to detect hypoxic events, Masimo SET® pulse oximetry demonstrated the highest sensitivity and specificity during induced conditions of motion and low perfusion.9

A More Complete Picture of the Brain

A More Complete Picture of the Brain


In addition to respiratory rate and pulse oximetry, Masimo also offers solutions for brain function monitoring and cerebral oximetry.

As in the ICU, in the PACU subjective assessments of brain function may be unobtainable while patients are weaned from anesthesia and sedation.10 Next Generation SedLine® brain function monitoring may be useful in helping clinicians assess the sedation state of the brain, with the bilateral acquisition and processing of four leads of electroencephalogram (EEG) signals. Next Generation SedLine features an enhanced signal processing engine, driving a variety of performance improvements, and an enhanced Multitaper Density Spectral Array (DSA).

Next Generation SedLine can be used simultaneously with O3® regional oximetry on the Root® platform for a more complete picture of the brain during patient recovery. O3 may help clinicians monitor cerebral oxygenation of adult and pediatric patients in situations in which pulse oximetry alone may not be fully indicative of the oxygen in the brain.

Masimo - Root O3 Sedline rainbow lite ISA NomoLine



Masimo - Root Tall Stand

Masimo’s oxygenation and perioperative monitoring solutions are available together on Root, a highly customizable, expandable patient monitoring and connectivity platform that occupies a minimal footprint in the PACU. Compact yet powerful, Root provides multiple high-impact, innovative measurements on a single platform, providing clinicians with more information in one place.

Iris Gateway™ and Iris® ports in Root facilitate automated data transfer from Root and multiple standalone third-party monitors — such as IV pumps, ventilators, and anesthesia machines – to hospital EMRs, which may reduce the likelihood of transcription errors11 or incomplete case records.




PACU Solutions



  1. 1.

    NICE CG50: Recognition of and response to acute illness in adults in hospital. National Institute of Clinical Excellence. http:// (2007). Accessed 02 Feb 2014.

  2. 2.

    The Joint Commission Sentinel Event Alert. Issue 49, August 8, 2012. SEA_49_opioids_8_2_12_final.pdf

  3. 3.

    Ramsay MAE et al. Anesth Analg. 2013 Jul;117(1):69-75.

  4. 4.

    Applegate RA et al. Anesth Analg. 2016;122(4):1070-8.

  5. 5.

    Macknet MR et al. Anesthesiology. 2007;107:A84. (abstract).

  6. 6.

    Goudra BG et al. Open J Anesthesiol. 2013; 3:74-79.

  7. 7.

    Hay WW. J of Perinatol, 2002;22:360-36. 

  8. 8.

    Barker SJ. Anesth Analg. 2002;95(4):967-72.

  9. 9.

    Shah N. et al. J Clin Anesth. 2012 Aug;24(5):385-91.

  10. 10.

    Barr, Juliana et al. Critical Care Medicine 41, no. 1 (2013): 263-306.

  11. 11.

    The Value of Medical Device Interoperability. West Health Institute. 2013.


Masimo - Brochure RRa


Masimo - Product Information Masimo SET

Product Information

Masimo - Brochure Perioperative Care Solutions
Masimo - Brochure, Next Generation SedLine


Masimo - Product Information, Root with SedLine Brain Function Monitoring

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Masimo - Product Information, Root with O3 Regional Oximetry

Product Information

Masimo - Root Product Information

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Masimo - Brochure, Masimo Automation Platform


The O3 system with pediatric indication is not licensed for sale in Canada.

Caution: Federal (USA) law restricts this device to sale by or on the order of a physician. See instructions for use for full prescribing information, including indications, contraindications, warnings, and precautions.