This trial is active, not recruiting.

Condition abdominal surgery
Sponsor Hospices Civils de Lyon
Start date October 2015
End date April 2016
Trial size 20 participants
Trial identifier NCT02817893, D22215


The waveform plethysmographic signal can be used to establish an index for predicting fluid responsiveness (∆POP: respiratory variation of the plethysmographic waveform of pulse oximetry). This index was validated in some studies and because of its non-invasiveness it seems very interesting in anesthesia.

However, in a previous study the investigators evaluated the correlation between the results provided by this index (∆POP) and those of the reference index (∆PP: pulse pressure variation), and the obtained results were significantly lower than what had been previously described. In this study, the index was calculated from a recording of a filtered signal. This unavoidable application of a filter on anesthesia monitors could contribute to the discrepancy between the ∆POP and the ∆PP.

The realization of a new study, comparing ∆PP and ∆POP obtained from an unfiltered plethysmographic signal, should answer the ∆POP ability to be used in place of ∆PP.

United States No locations recruiting
Other countries No locations recruiting

Study Design

Observational model cohort
Time perspective prospective

Primary Outcomes

∆PP: pulse pressure variation
time frame: Day 0
∆POP: respiratory variation of the plethysmographic waveform of pulse oximetry
time frame: Day 0

Eligibility Criteria

Male or female participants at least 18 years old.

Inclusion Criteria: - Hospital patient in general surgery and digestive department - Adult - Digestive sus mesocolic surgery with direct abdominal approach justifying a semi-invasive hemodynamic monitoring by arterial catheterization (liver, pancreatic, gastric and duodenal surgery) - Surgical approach by laparotomy - Patient under general anesthesia with mechanical ventilation - Agreeing to participate in the study after receiving information note Exclusion Criteria: - Known left systolic ventricular and/or diastolic failure - Arrhythmias - Surgery performed with thoracic approach - Surgery by laparoscopy - Emergency surgery - Hypersensitivity or allergic to any of the product used for usual anesthesia, hypersensitivity to soya or egg lecithin - Personal or familial history of malignant hyperthermia - Severe kidney impairment (creatinin clearance <30ml/min) - Patients who participated in the previous month to another study protocol - Pregnant women or nursing - Under-age

Additional Information

Official title Comparison of Respiratory Variations of the Pulse Oximetry Plethysmographic Raw Signal and Pulse Pressure During Abdominal Surgery (PLETHYSMO)
Trial information was received from ClinicalTrials.gov and was last updated in June 2016.
Information provided to ClinicalTrials.gov by Hospices Civils de Lyon.